Mark the packages whose tests read files outside their directory, found by the review (issue 1935)

Reviewed-on: #452

.gitignore

@@ -2,9 +2,11 @@
 
 # A built binary. The lab writes one here when pointed at the repository root by mistake;
 # built artifacts belong in build/, which is already ignored.
-/mesh-builder
 /mesh-controller
 /postgres-provisioner
 /redis-provisioner
 # And where `go build` in cmd/mesh-controller leaves it (novox/hq issue 233).
 /cmd/mesh-controller/mesh-controller
+
+# No repository commits its dependencies (issue 1305).
+vendor/

Dockerfile

@@ -21,17 +21,15 @@ ARG GO_BASE=golang@sha256:8ac98ca534ac3f51e1f420a1dd2c15e74c75cfa0f23f3ad27eb5d7
 FROM ${GO_BASE} AS build
 WORKDIR /src
 
-# **Nothing is fetched** (novox/hq to-be 45 Phase 1): every dependency is in vendor/, committed, so
-# the image builds from this repository alone — the host's validator among them, whose module no
-# public proxy is asked for. Dependencies first, so a change to the source does not re-copy them.
+# **No dependency is committed** (issue 1305): go.sum names each one's version and checksum, and the build
+# resolves them with -mod=mod. Dependencies first, so a change to the source does not re-copy them.
 COPY go.mod go.sum ./
-COPY vendor/ vendor/
 
 # `COPY . .` brings `.git` along, so Go is told not to stamp the commit: the version is said by -X, and a
 # rebuild of an unchanged program is the same bytes (novox/hq ADR 0267 rule 6, issue 363).
 COPY . .
 ARG VERSION=development
-RUN CGO_ENABLED=0 GOFLAGS=-mod=vendor GOPROXY=off go build -trimpath -buildvcs=false \
+RUN CGO_ENABLED=0 GOFLAGS=-mod=mod go build -trimpath -buildvcs=false \
         -ldflags "-s -w -X main.version=${VERSION}" \
         -o /mesh-controller ./cmd/mesh-controller
 

Makefile

@@ -46,17 +46,6 @@ image:
 	@echo
 	@docker image inspect $(IMAGE) --format 'built {{.RepoTags}}  {{.Size}} bytes'
 
-# The builder ships as an image too, because it is a module the mesh assigns rather than a program
-# somebody starts on a machine by hand.
-BUILDER_IMAGE ?= mesh-builder:$(VERSION)
-BUILDER_DEV_TAG ?= mesh-builder:development
-
-builder-image:
-	@test -n "$(GO_BASE)" || { echo "no GO_BASE; pass GO_BASE=<image>"; exit 1; }
-	docker build --build-arg GO_BASE=$(GO_BASE) -f cmd/mesh-builder/Dockerfile -t $(BUILDER_IMAGE) -t $(BUILDER_DEV_TAG) .
-	@echo
-	@docker image inspect $(BUILDER_IMAGE) --format 'built {{.RepoTags}}  {{.Size}} bytes'
-
 # The provisioner ships as an image too, because it is the thing that makes a sealed credential
 # true on a machine -- and the mesh cannot, having discarded the plaintext.
 PROVISIONER_IMAGE ?= mesh-provision-postgres:$(VERSION)
@@ -90,35 +79,6 @@ redis-provisioner-image:
 	@echo
 	@docker image inspect $(REDIS_PROVISIONER_IMAGE) --format 'built {{.RepoTags}}  {{.Size}} bytes'
 
-# The proxy that turns a route grant into traffic reaching a workload.
-PROXY_IMAGE ?= mesh-route-proxy:$(VERSION)
-PROXY_DEV_TAG ?= mesh-route-proxy:development
-
-proxy-image:
-	docker build --build-arg GO_BASE=$(GO_BASE) -f modules/route-proxy/Dockerfile -t $(PROXY_IMAGE) -t $(PROXY_DEV_TAG) .
-	@echo
-	@docker image inspect $(PROXY_IMAGE) --format 'built {{.RepoTags}}  {{.Size}} bytes'
-
-# The whole check. Raises a database, runs the repository's own check against it -- merge-check.sh,
-# the very script `mesh/repo-check` runs -- and takes the database down again, including when the
-# check fails, which is why the teardown is not conditional and the script's exit status is the
-# target's.
-#
-# **It calls the script rather than restating it** (novox/hq issue 431): this target used to list its
-# own steps, its formatting step walked vendor/ where the script's does not, and it failed on
-# third-party code no change could fix -- so a developer's check and the gate disagreed, and the steps
-# after formatting never ran through it. The script is the one list of steps; this target only gives it
-# a database (MESH_TEST_POSTGRES, exported above).
-#
-# **Two levels** (issue 895): the unit level, `go test ./...` untagged, timed and held to a bound; and the integration
-# level, `-tags integration`, the tests that start a bus, a store or another process. Each is said with its time.
-#
-# **Packages in parallel, under the race detector, each test on a bus of its own** (internal/testbus),
-# as the script runs them: a bus per test, of the release the mesh runs, makes the suite the same in any
-# order, and the timeout bounds a hang to a failure with a stack, never a stalled gate.
-check: postgres
-	@sh merge-check.sh ; status=$$? ; docker rm -f $(PG_CONTAINER) >/dev/null 2>&1 || true ; exit $$status
-
 # The unit level alone (untagged: no bus, no store, no other process), which a developer runs continuously. The tests
 # that need a bus or the store carry `//go:build integration` and run in `check`, not here; without a database the
 # store's tests would skip rather than fail anyway.
@@ -128,14 +88,13 @@ test:
 vet:
 	go vet ./...
 
-# Quick steps for a developer, not part of `check`. The directories gofmt reads must be the ones
-# merge-check.sh lists, never `.`, which walks vendor/ (novox/hq issue 431).
+# A quick step for a developer: the checker runs the build module's own formatting and vet (ADR 0501 §5, D7).
 fmt:
 	@unformatted=$$(gofmt -l cmd internal examples) ; \
 	if [ -n "$$unformatted" ] ; then echo "not gofmt'd:" ; echo "$$unformatted" ; exit 1 ; fi
 
 postgres:
-	@docker rm -f $(PG_CONTAINER) >/dev/null 2>&1 || true
+	@docker rm -f -v $(PG_CONTAINER) >/dev/null 2>&1 || true
 	@docker run -d --name $(PG_CONTAINER) -e POSTGRES_PASSWORD=check \
 		-p 127.0.0.1:$(PG_PORT):5432 $(PG_IMAGE) >/dev/null
 	@printf 'waiting for postgres'
@@ -147,7 +106,7 @@ postgres:
 	echo ' — never came up' ; docker logs $(PG_CONTAINER) | tail -20 ; exit 1
 
 postgres-stop:
-	@docker rm -f $(PG_CONTAINER) >/dev/null 2>&1 || true
+	@docker rm -f -v $(PG_CONTAINER) >/dev/null 2>&1 || true
 
 clean:
 	rm -rf build/

RELEASE-57.md

@@ -1,6 +0,0 @@
-# Release 57: config and provisioning
-
-This branch carries the work of hq design 57 (ADR 0348, ADR 0349) in this repository. Each package
-merges here through its own reviewed pull request; the branch reaches main as one pull request, in one
-delivery group with the branch of the same name in mesh-controller, mesh-host, mesh-sdk, mesh-catalog
-and hq, after a rehearsal in the lab. This file is deleted by the last commit before that pull request.

check-nested-modules.sh

@@ -1,29 +0,0 @@
-#!/bin/sh
-# The unit tests of every Go module of its own below this repository's root, run from the root, for merge-check.sh
-# and for the test that tries it on a tree (merge_check_nested_test.go). Its own file so that the test needs no
-# particular merge-check.sh: the check that judges a change to merge-check.sh is main's.
-set -eu
-cgo="${cgo:-0}"
-race="${race:-}"
-
-# nested_modules vets and tests every Go module of its own below the root, `modules/<name>/go.mod` (novox/hq ADR 0420
-# §5, issue 1025): `./...` stops at a nested go.mod, so a module that lives whole in this repository would have its
-# unit tests run by nobody. None is a pass. Each runs in its own directory, outside the vendor directory this
-# repository's own packages are built from; a nested module vendors what the forge holds (its own `vendor/`, so the
-# check runs offline), as this repository's root module does (issue 1019). A failing module fails the check; the others are still run.
-nested_modules() {
-	nested=0
-	for gomod in modules/*/go.mod; do
-		[ -e "$gomod" ] || continue
-		dir=$(dirname "$gomod")
-		echo "nested module $dir:"
-		if ! (cd "$dir" && GOFLAGS= CGO_ENABLED=0 go vet ./... &&
-			GOFLAGS= CGO_ENABLED="${cgo:-0}" go test ${race:-} -count=1 -timeout 30m ./...); then
-			echo "nested module $dir FAILED"
-			nested=1
-		fi
-	done
-	return $nested
-}
-
-nested_modules

cmd/mesh-builder/Dockerfile

@@ -1,22 +0,0 @@
-ARG ALPINE_BASE=alpine:3
-ARG GO_BASE=golang:1.25-alpine
-# The builder, as a module ships one.
-#
-# Not FROM scratch, unlike the control plane: this one runs git and a container client, so it
-# needs a filesystem with them on it. That is the honest cost of a machine whose job is to build —
-# and it is why building is a MODULE on a machine that has a runtime rather than something the
-# control plane does (novox/hq ADR 0005).
-FROM ${GO_BASE} AS build
-WORKDIR /src
-COPY go.mod go.sum ./
-RUN go mod download
-COPY . .
-RUN CGO_ENABLED=0 go build -trimpath -buildvcs=false -ldflags '-s -w' -o /mesh-builder ./cmd/mesh-builder
-
-FROM ${ALPINE_BASE}
-# git to clone what it is asked to build, and the docker client to build and push it. The daemon
-# is the machine's, reached through its socket — a build machine shares the runtime it was given
-# rather than running one inside itself.
-RUN apk add --no-cache git docker-cli
-COPY --from=build /mesh-builder /usr/local/bin/mesh-builder
-ENTRYPOINT ["/usr/local/bin/mesh-builder"]

cmd/mesh-builder/busy.go

@@ -1,146 +0,0 @@
-package main
-
-import (
-	"errors"
-	"fmt"
-	"os"
-	"path/filepath"
-	"strings"
-	"time"
-)
-
-// **The build agent says whether it is busy, and being asked drains it** (novox/hq ADR 0335 §1, §5). Its
-// container declares `busy` as `mesh-builder busy`: the node-engine runs it inside the container before it
-// replaces it. It exits 0 while a build is in hand and 1 when none is; and from the first ask the agent takes
-// no new build request, so its answer ends once the build in hand ends — a replaced builder finishes the check
-// it runs, instead of the build queue handing it out again from the start (issue 594).
-//
-// Two marks in the container's own temporary directory, as the ready mark (ready.go): a new container starts
-// without them, and a restarted one removes them before it takes work again.
-//
-//   - in hand: written by the agent when it claims a request, before it reads whether it is drained; removed
-//     when the build ends.
-//   - drained: written by the ask, before it reads whether a build is in hand.
-//
-// Each side writes its own mark before it reads the other's, so an ask racing a fetch sees the build in hand,
-// or the agent sees the drain and hands the request back; never neither.
-
-func inHandMark() string { return filepath.Join(os.TempDir(), "mesh-builder.in-hand") }
-func drainMark() string  { return filepath.Join(os.TempDir(), "mesh-builder.drained") }
-
-// The drain lapses when no ask has come for drainLapse: the node-engine asks every 20 seconds for as long as it
-// really waits, so an agent whose replacement was withdrawn — the declaration put back, the walk stopped —
-// takes work again rather than staying drained for ever (review of ADR 0335). And an agent drained for longer
-// than the node-engine's bound and the slack says it is not ready: the replacement it was drained for never
-// came, which is a fault to see.
-const (
-	drainLapse   = 2 * time.Minute
-	drainTooLong = 15*time.Minute + 5*time.Minute
-)
-
-// drainedAt is when the drain began and when it was last asked, from its mark; false when there is no mark.
-func drainedAt() (began, asked time.Time, ok bool) {
-	info, err := os.Stat(drainMark())
-	if err != nil {
-		return time.Time{}, time.Time{}, false
-	}
-	asked = info.ModTime()
-	began = asked
-	if raw, err := os.ReadFile(drainMark()); err == nil {
-		if t, err := time.Parse(time.RFC3339, strings.TrimSpace(string(raw))); err == nil && !t.After(asked) {
-			began = t
-		}
-	}
-	return began, asked, true
-}
-
-// drained says the agent was asked whether it is busy within drainLapse: it takes no new build request.
-func drained() bool { return drainedSince(time.Now()) }
-
-func drainedSince(now time.Time) bool {
-	_, asked, ok := drainedAt()
-	return ok && now.Sub(asked) < drainLapse
-}
-
-// drainedTooLong is the health check's second half: nil unless the agent has been drained, asked all along, for
-// longer than its node-engine's bound and the slack.
-func drainedTooLong(now time.Time) error {
-	began, asked, ok := drainedAt()
-	if !ok || now.Sub(asked) >= drainLapse || now.Sub(began) <= drainTooLong {
-		return nil
-	}
-	return fmt.Errorf("drained since %s and still asked: the replacement its node-engine waits for has not come "+
-		"within %s (novox/hq ADR 0335)", began.UTC().Format(time.RFC3339), drainTooLong)
-}
-
-// claim marks a request in hand, unless the agent is drained: then nothing is in hand, and the request goes
-// back to the queue.
-func claim() bool {
-	// Made, never written over: one build at a time, and a mark already there is a build in hand.
-	f, err := os.OpenFile(inHandMark(), os.O_WRONLY|os.O_CREATE|os.O_EXCL, 0o644)
-	if err != nil {
-		// Unmarked, an ask would say idle while this build runs: the build is not taken.
-		fmt.Fprintf(os.Stderr, "cannot mark a build in hand (%s), so it is handed back: %v\n", inHandMark(), err)
-		return false
-	}
-	_, err = f.WriteString(time.Now().UTC().Format(time.RFC3339) + "\n")
-	if closeErr := f.Close(); err == nil {
-		err = closeErr
-	}
-	if err != nil {
-		_ = os.Remove(inHandMark())
-		fmt.Fprintf(os.Stderr, "cannot mark a build in hand (%s), so it is handed back: %v\n", inHandMark(), err)
-		return false
-	}
-	if drained() {
-		_ = os.Remove(inHandMark())
-		fmt.Fprintln(os.Stderr, "asked whether busy, so this agent takes no new build: handed back")
-		return false
-	}
-	return true
-}
-
-// holding says what is in hand, for the ask to print: written once the request is read.
-func holding(what string) {
-	_ = os.WriteFile(inHandMark(), []byte(time.Now().UTC().Format(time.RFC3339)+" "+what+"\n"), 0o644)
-}
-
-// released ends the build in hand.
-func released() {
-	if err := os.Remove(inHandMark()); err != nil && !errors.Is(err, os.ErrNotExist) {
-		fmt.Fprintf(os.Stderr, "cannot remove the mark of the build in hand (%s): %v\n", inHandMark(), err)
-	}
-}
-
-// undrained clears both marks at the start of a holder: a container started again is asked afresh.
-func undrained() error {
-	for _, mark := range []string{drainMark(), inHandMark()} {
-		if err := os.Remove(mark); err != nil && !errors.Is(err, os.ErrNotExist) {
-			return fmt.Errorf("cannot remove %s: %w", mark, err)
-		}
-	}
-	return nil
-}
-
-// busy is the ask: it drains the agent, then says whether a build is in hand. Nil — exit 0 — while one is.
-func busy() (string, error) {
-	// The mark keeps when the drain began while it is asked within drainLapse, and is written again on every
-	// ask: its time is the last ask.
-	began := time.Now().UTC()
-	if was, _, ok := drainedAt(); ok && drained() {
-		began = was.UTC()
-	}
-	if err := os.WriteFile(drainMark(), []byte(began.Format(time.RFC3339)+"\n"), 0o644); err != nil {
-		// Not drained, it could take the next build: said, and answered busy only for what is in hand now.
-		fmt.Fprintf(os.Stderr, "cannot mark this agent drained (%s): %v\n", drainMark(), err)
-	}
-	held, err := os.ReadFile(inHandMark())
-	if err != nil {
-		return "", errors.New("idle: no build in hand, and this agent takes no new one")
-	}
-	since, what, _ := strings.Cut(strings.TrimSpace(string(held)), " ")
-	if what == "" {
-		what = "a build"
-	}
-	return fmt.Sprintf("busy: %s, in hand since %s; taking no new build", what, since), nil
-}

cmd/mesh-builder/busy_test.go

@@ -1,162 +0,0 @@
-package main
-
-import (
-	"os"
-	"strings"
-	"sync"
-	"testing"
-	"time"
-)
-
-// `mesh-builder busy` answers 0 while a build is in hand and non-zero when idle, and after its first ask the
-// agent takes no new build request (novox/hq ADR 0335 §5).
-func TestBusyAnswersWhileABuildIsInHandAndDrainsTheAgent(t *testing.T) {
-	t.Setenv("TMPDIR", t.TempDir())
-	if err := undrained(); err != nil {
-		t.Fatal(err)
-	}
-	if drained() {
-		t.Fatal("an agent never asked is drained")
-	}
-	// A build is claimed and runs.
-	if !claim() {
-		t.Fatal("an agent never asked refused a build")
-	}
-	holding("novox/mesh-controller (check-280)")
-	said, err := busy()
-	if err != nil || !strings.Contains(said, "novox/mesh-controller (check-280)") {
-		t.Fatalf("an agent with a build in hand did not answer busy with what it holds: %q %v", said, err)
-	}
-	// From that ask on it takes nothing new: the fetch is not made, and one fetched is handed back.
-	if !drained() {
-		t.Fatal("the ask did not drain the agent")
-	}
-	if claim() {
-		t.Fatal("a drained agent took a new build")
-	}
-	// The build in hand is still in hand after the refused claim, and busy goes on saying so.
-	if _, err := busy(); err != nil {
-		t.Fatalf("a refused claim ended the build in hand: %v", err)
-	}
-	// It ends: idle, and still drained.
-	released()
-	if _, err := busy(); err == nil {
-		t.Fatal("an agent with nothing in hand answered busy")
-	}
-	if claim() {
-		t.Fatal("a drained agent took a build after its last one ended")
-	}
-	// Started again, it is asked afresh.
-	if err := undrained(); err != nil {
-		t.Fatal(err)
-	}
-	if drained() || !claim() {
-		t.Fatal("a holder started again is still drained")
-	}
-	released()
-}
-
-// An ask racing a fetch sees the build in hand, or the agent sees the drain and hands the request back: never
-// neither, which would replace the container under a build just taken.
-func TestAnAskRacingAFetchNeverMissesTheBuild(t *testing.T) {
-	t.Setenv("TMPDIR", t.TempDir())
-	for i := 0; i < 200; i++ {
-		if err := undrained(); err != nil {
-			t.Fatal(err)
-		}
-		var claimed bool
-		var askErr error
-		var wg sync.WaitGroup
-		wg.Add(2)
-		go func() { defer wg.Done(); claimed = claim() }()
-		go func() { defer wg.Done(); _, askErr = busy() }()
-		wg.Wait()
-		if claimed && askErr != nil {
-			t.Fatalf("round %d: the agent took a build and the ask said idle", i)
-		}
-		released()
-	}
-}
-
-// A drain no longer asked lapses: an agent whose replacement was withdrawn after the first ask (a put-back, a
-// revert, a stopped walk) takes work again after drainLapse, rather than staying drained with its health green.
-func TestADrainNoLongerAskedLapses(t *testing.T) {
-	t.Setenv("TMPDIR", t.TempDir())
-	if err := undrained(); err != nil {
-		t.Fatal(err)
-	}
-	if _, err := busy(); err == nil {
-		t.Fatal("an idle agent answered busy")
-	}
-	if !drained() || claim() {
-		t.Fatal("an agent just asked takes work")
-	}
-	// The last ask was three minutes ago.
-	old := time.Now().Add(-3 * time.Minute)
-	if err := os.Chtimes(drainMark(), old, old); err != nil {
-		t.Fatal(err)
-	}
-	if drained() {
-		t.Fatal("a drain no longer asked for three minutes still holds")
-	}
-	if !claim() {
-		t.Fatal("an agent whose drain lapsed takes no work")
-	}
-	released()
-}
-
-// An agent drained, and asked all along, for longer than its node-engine's bound and the slack is not ready: the
-// replacement it was drained for never came. One asked again after a lapse starts a new drain.
-func TestAnAgentDrainedTooLongIsNotReady(t *testing.T) {
-	t.Setenv("TMPDIR", t.TempDir())
-	if err := undrained(); err != nil {
-		t.Fatal(err)
-	}
-	taking("mesh-build-machine")
-	if _, err := busy(); err == nil {
-		t.Fatal("an idle agent answered busy")
-	}
-	now := time.Now()
-	if err := drainedTooLong(now); err != nil {
-		t.Fatalf("an agent drained a moment ago is not ready: %v", err)
-	}
-	// The drain began 25 minutes ago, and the node-engine asked a moment ago.
-	began := now.Add(-25 * time.Minute).UTC().Format(time.RFC3339)
-	if err := os.WriteFile(drainMark(), []byte(began+"\n"), 0o644); err != nil {
-		t.Fatal(err)
-	}
-	err := drainedTooLong(time.Now())
-	if err == nil || !strings.Contains(err.Error(), "has not come") {
-		t.Fatalf("an agent drained for 25 minutes reads ready: %v", err)
-	}
-	// Each ask keeps when the drain began.
-	if _, err := busy(); err == nil {
-		t.Fatal("an idle agent answered busy")
-	}
-	if err := drainedTooLong(time.Now()); err == nil {
-		t.Fatal("an ask started the drain again")
-	}
-	// The asks stopped: the drain lapsed, and so did the fault.
-	old := time.Now().Add(-3 * time.Minute)
-	if err := os.Chtimes(drainMark(), old, old); err != nil {
-		t.Fatal(err)
-	}
-	if err := drainedTooLong(time.Now()); err != nil {
-		t.Fatalf("a lapsed drain still reads not ready: %v", err)
-	}
-}
-
-// An ask this build does not know exits non-zero: an older image asked `busy` reads idle, not busy for the
-// node-engine's whole bound.
-func TestAnUnknownCommandFails(t *testing.T) {
-	was := os.Args
-	t.Cleanup(func() { os.Args = was })
-	os.Args = []string{"mesh-builder", "some-later-word"}
-	if err := run(); err == nil {
-		t.Fatal("an unknown command exited 0")
-	}
-	os.Args = []string{"mesh-builder", "help"}
-	if err := run(); err != nil {
-		t.Fatalf("help failed: %v", err)
-	}
-}

cmd/mesh-builder/check_spec_test.go

@@ -1,38 +0,0 @@
-package main
-
-import (
-	"testing"
-
-	"github.com/novox/mesh-controller/internal/builder"
-	"github.com/novox/mesh-controller/internal/link"
-)
-
-// The build seat hands the check the judge cache the build agent declares (MESH_JUDGE_CACHE), never a path of its own.
-func TestTheBuildSeatHandsTheCheckTheJudgeCacheItDeclares(t *testing.T) {
-	t.Setenv("MESH_JUDGE_CACHE", "/var/lib/mesh/build-agent/judge-cache")
-	if got := judgeCache(); got != "/var/lib/mesh/build-agent/judge-cache" {
-		t.Fatalf("the judge cache the manifest declares is read as %q", got)
-	}
-	t.Setenv("MESH_JUDGE_CACHE", "")
-	if got := judgeCache(); got != "" {
-		t.Fatalf("with no judge cache declared, %q is used", got)
-	}
-}
-
-// The siblings a check is asked to read reach the build seat's spec and, as read, the outcome (novox/hq ADR 0382).
-func TestTheSiblingsAnAskNamesReachTheSpecAndTheOutcome(t *testing.T) {
-	spec := checkSpecOf(link.BuildRequest{Check: &link.CheckRequest{Owner: "novox", Repo: "mesh-host", Base: "main",
-		Siblings:        []link.CheckSibling{{Repository: "novox/mesh-controller", Number: 346, Head: "a", Base: "main", Dir: "mesh-controller"}},
-		SiblingsUnknown: "why"}})
-	if len(spec.Siblings) != 1 || spec.Siblings[0] != (builder.Sibling{Repository: "novox/mesh-controller", Number: 346,
-		Head: "a", Base: "main", Dir: "mesh-controller"}) || spec.SiblingsUnknown != "why" {
-		t.Fatalf("the spec reads %+v", spec)
-	}
-	out := siblingsOut([]builder.JudgedSibling{{Repository: "novox/mesh-controller", Number: 346, Head: "a", Base: "main", BaseCommit: "b"}})
-	if len(out) != 1 || out[0].BaseCommit != "b" || out[0].Number != 346 {
-		t.Fatalf("the outcome reads %+v", out)
-	}
-	if plain := checkSpecOf(link.BuildRequest{Check: &link.CheckRequest{Owner: "o", Repo: "r"}}); plain.Siblings != nil {
-		t.Fatalf("a request that names none has siblings %+v", plain.Siblings)
-	}
-}

cmd/mesh-builder/holder.go

@@ -1,433 +0,0 @@
-package main
-
-import (
-	"context"
-	"encoding/json"
-	"errors"
-	"fmt"
-	"os"
-	"os/exec"
-	"path/filepath"
-	"strings"
-	"sync"
-	"time"
-
-	"github.com/nats-io/nats.go/micro"
-
-	"git.novox.be/novox/mesh-sdk/go/catalogue"
-	"github.com/novox/mesh-controller/internal/builder"
-	"github.com/novox/mesh-controller/internal/link"
-)
-
-// What a holder of the build seat answers for, on its own machine (novox/hq ADR 0219).
-//
-// **The queue is the controller's; the build running here is this machine's.** The controller can
-// see and change what waits in the seat's queue, but an ask a holder already took is a process tree
-// on this machine and containers in this machine's runtime, and only this machine can end them. So
-// the holder serves four verbs on the seat's subjects for this machine: what it is building, kill
-// it, pause, resume.
-//
-// **One build at a time** (ADR 0190), which is also what builder.Said assumes — a package global
-// set per build — so "the build running here" is one or none, and kill names it by id so a call
-// that arrives as one build ends and the next begins cannot end the wrong one.
-
-// holder is this machine's state as a holder of the build seat.
-type holder struct {
-	on, seat string
-	// workspace is where the paused flag is kept, so a holder restarted while paused stays paused
-	// rather than silently taking work again.
-	workspace string
-	// say publishes this machine's state: whether it takes work (link.HolderState).
-	say func(link.HolderState) error
-	// remove runs what a kill needs outside the build: the containers left behind.
-	remove builder.Runner
-	// scratch is where check builds are kept (novox/hq ADR 0350 §5): what the week's sweep lets go of. Nil where
-	// this machine publishes to no artifact store.
-	scratch builder.Scratch
-
-	mu      sync.Mutex
-	paused  bool
-	running *running
-}
-
-// running is the build this machine is doing.
-type running struct {
-	request link.BuildRequest
-	step    string
-	started time.Time
-	cancel  context.CancelFunc
-	killed  bool
-	// returned is the build's own work having ended, before a kill or not; outcome is what was then
-	// announced, and announced whether it went out.
-	returned  bool
-	outcome   string
-	announced bool
-	done      chan struct{}
-}
-
-// pausedFile is where the flag lives in the workspace.
-func pausedFile(workspace string) string { return filepath.Join(workspace, ".mesh-builder-paused") }
-
-// newHolder reads the paused flag the workspace keeps.
-func newHolder(on, seat, workspace string, say func(link.HolderState) error) *holder {
-	h := &holder{on: on, seat: seat, workspace: workspace, say: say, remove: plainRun}
-	if _, err := os.Stat(pausedFile(workspace)); err == nil {
-		h.paused = true
-	}
-	return h
-}
-
-// Paused is asked by the taking loop before every fetch.
-func (h *holder) Paused() bool {
-	h.mu.Lock()
-	defer h.mu.Unlock()
-	return h.paused
-}
-
-// setPaused records the flag in the workspace first and then in memory, so what this holder says
-// it is and what it would be after a restart never differ.
-func (h *holder) setPaused(paused bool) error {
-	path := pausedFile(h.workspace)
-	if paused {
-		if err := os.MkdirAll(h.workspace, 0o755); err != nil {
-			return err
-		}
-		if err := os.WriteFile(path, []byte(time.Now().UTC().Format(time.RFC3339)+"\n"), 0o644); err != nil {
-			return fmt.Errorf("cannot keep the paused flag in %s: %w", path, err)
-		}
-	} else if err := os.Remove(path); err != nil && !errors.Is(err, os.ErrNotExist) {
-		return fmt.Errorf("cannot remove the paused flag %s: %w", path, err)
-	}
-	h.mu.Lock()
-	h.paused = paused
-	h.mu.Unlock()
-	h.announce()
-	return nil
-}
-
-// announce says whether this machine takes work. Never fatal: the flag is kept either way, and the
-// controller reading an older state is a plan read as late rather than a build lost.
-func (h *holder) announce() {
-	if h.say == nil {
-		return
-	}
-	if err := h.say(link.HolderState{On: h.on, Paused: h.Paused(), At: time.Now().UTC().Format(time.RFC3339Nano)}); err != nil {
-		fmt.Fprintf(os.Stderr, "cannot say whether this machine takes builds: %v\n", err)
-	}
-}
-
-// stateWhilePaused says this machine's state at start, and again every while it stays paused, so
-// a pause outlives the events stream's retention.
-func (h *holder) stateWhilePaused(ctx context.Context, every time.Duration) {
-	h.announce()
-	tick := time.NewTicker(every)
-	defer tick.Stop()
-	for {
-		select {
-		case <-ctx.Done():
-			return
-		case <-tick.C:
-			if h.Paused() {
-				h.announce()
-			}
-		}
-	}
-}
-
-// expireChecks lets go of every check build older than a week (novox/hq ADR 0350 §5), at start and every while
-// after. Every holder sweeps the one store; what one let go of, another finds gone.
-func (h *holder) expireChecks(ctx context.Context, every time.Duration, now func() time.Time) {
-	sweep := func() {
-		if h.scratch == nil {
-			return
-		}
-		n, err := h.scratch.Expire(ctx, builder.CheckBuildsKept, now())
-		switch {
-		case err != nil:
-			fmt.Fprintf(os.Stderr, "check builds older than %s: %d let go of, and not all: %v\n", builder.CheckBuildsKept, n, err)
-		case n > 0:
-			fmt.Fprintf(os.Stderr, "check builds older than %s: %d check(s)' builds let go of\n", builder.CheckBuildsKept, n)
-		}
-	}
-	sweep()
-	tick := time.NewTicker(every)
-	defer tick.Stop()
-	for {
-		select {
-		case <-ctx.Done():
-			return
-		case <-tick.C:
-			sweep()
-		}
-	}
-}
-
-// begin records the build this machine took, with the cancel that ends it.
-func (h *holder) begin(request link.BuildRequest, cancel context.CancelFunc) *running {
-	r := &running{request: request, started: time.Now(), cancel: cancel, done: make(chan struct{})}
-	h.mu.Lock()
-	h.running = r
-	h.mu.Unlock()
-	return r
-}
-
-// end clears it, and lets a kill waiting on it know it is over.
-func (h *holder) end(r *running) {
-	h.mu.Lock()
-	if h.running == r {
-		h.running = nil
-	}
-	h.mu.Unlock()
-	close(r.done)
-}
-
-// stepped records the step a build is at, for `current`.
-func (h *holder) stepped(r *running, step string) {
-	h.mu.Lock()
-	r.step = step
-	h.mu.Unlock()
-}
-
-// currentBuild is what `current` answers.
-type currentBuild struct {
-	On      string `json:"on"`
-	Paused  bool   `json:"paused"`
-	Running *struct {
-		ID         string `json:"id"`
-		Repository string `json:"repository"`
-		Path       string `json:"path,omitempty"`
-		Ref        string `json:"ref,omitempty"`
-		Step       string `json:"step,omitempty"`
-		Started    string `json:"started"`
-		Elapsed    string `json:"elapsed"`
-	} `json:"running,omitempty"`
-	Said string `json:"said"`
-}
-
-func (h *holder) current() currentBuild {
-	h.mu.Lock()
-	defer h.mu.Unlock()
-	out := currentBuild{On: h.on, Paused: h.paused}
-	taking := "taking builds"
-	if h.paused {
-		taking = "paused, taking no new build"
-	}
-	if h.running == nil {
-		out.Said = fmt.Sprintf("%s is building nothing; %s", h.on, taking)
-		return out
-	}
-	r := h.running
-	elapsed := time.Since(r.started).Round(time.Second)
-	out.Running = &struct {
-		ID         string `json:"id"`
-		Repository string `json:"repository"`
-		Path       string `json:"path,omitempty"`
-		Ref        string `json:"ref,omitempty"`
-		Step       string `json:"step,omitempty"`
-		Started    string `json:"started"`
-		Elapsed    string `json:"elapsed"`
-	}{r.request.ID, r.request.Repository, r.request.Path, r.request.Ref, r.step,
-		r.started.UTC().Format(time.RFC3339), elapsed.String()}
-	out.Said = fmt.Sprintf("%s is building %s (%s) at %s for %s; %s",
-		h.on, r.request.Repository, r.request.ID, orNothing(r.step), elapsed, taking)
-	return out
-}
-
-// The bounds a kill keeps: each pass removing containers, and the wait for the build to end between
-// them. The worst case — 15s, 20s, 15s — is inside what the controller waits for the answer
-// (killAnswer in the controller's queue.go, 75s).
-var (
-	killRemoves = 15 * time.Second
-	killWaits   = 20 * time.Second
-)
-
-// kill ends the build with this id, if it is the one running here and still working: its context
-// cancelled — which kills each command's process group — and the containers it started removed by
-// their label, once at once and again after the build has ended, so one created while it was being
-// killed is not left. The build's own goroutine announces it failed, killed by hand, and settles the
-// ask so it is not redelivered; the answer says whether that happened.
-func (h *holder) kill(id string) (string, error) {
-	h.mu.Lock()
-	r := h.running
-	if r == nil || r.request.ID != id {
-		doing := "nothing"
-		if r != nil {
-			doing = r.request.ID
-		}
-		h.mu.Unlock()
-		return "", fmt.Errorf("%s is not building %s; it is building %s. `queue` says where an ask is", h.on, id, doing)
-	}
-	if r.returned {
-		h.mu.Unlock()
-		return "", fmt.Errorf("%s on %s has already ended on its own and is saying how; `builds` shows it", id, h.on)
-	}
-	r.killed = true
-	cancel, done := r.cancel, r.done
-	h.mu.Unlock()
-
-	cancel()
-	removed, removeErr := h.removeContainers(id)
-	ended := false
-	select {
-	case <-done:
-		ended = true
-	case <-time.After(killWaits):
-	}
-	again, againErr := h.removeContainers(id)
-	removed += again
-	if removeErr == nil {
-		removeErr = againErr
-	}
-	containers := fmt.Sprintf("%d container(s) it started removed", removed)
-	if removeErr != nil {
-		containers = "its containers could not all be listed or removed: " + removeErr.Error()
-	}
-	if !ended {
-		return fmt.Sprintf("killed %s on %s: %s; the build has not finished ending yet — `builds` says when "+
-			"its outcome is in", id, h.on, containers), nil
-	}
-	h.mu.Lock()
-	outcome, announced := r.outcome, r.announced
-	h.mu.Unlock()
-	if !announced {
-		return fmt.Sprintf("killed %s (%s) on %s: its commands ended and %s, and its outcome could not be "+
-			"announced — the ask is not settled and will be handed out again", id, r.request.Repository, h.on,
-			containers), nil
-	}
-	return fmt.Sprintf("killed %s (%s) on %s: its commands ended, %s, and its outcome announced as failed, %s — "+
-		"settled, so it is not handed to another machine", id, r.request.Repository, h.on, containers, outcome), nil
-}
-
-// removeContainers is one pass of removing what the build left, bounded.
-func (h *holder) removeContainers(id string) (int, error) {
-	cleanup, stop := context.WithTimeout(context.Background(), killRemoves)
-	defer stop()
-	return builder.RemoveContainersOf(cleanup, h.remove, id)
-}
-
-// removeLeftBehind removes, once, what earlier holders on this machine left — called before anything is
-// taken, so none of it is this holder's — and says what it did. A runtime that cannot be asked is said
-// and the holder takes work all the same: what is left is waste, not a reason to stop building.
-func (h *holder) removeLeftBehind() int {
-	cleanup, stop := context.WithTimeout(context.Background(), killRemoves)
-	defer stop()
-	n, err := builder.RemoveLeftBehind(cleanup, h.remove)
-	switch {
-	case err != nil:
-		fmt.Fprintf(os.Stderr, "could not look for containers earlier builds left on %s: %v\n", h.on, err)
-	case n > 0:
-		fmt.Fprintf(os.Stderr, "removed %d container(s) earlier builds left on %s\n", n, h.on)
-	}
-	return n
-}
-
-// returned records that the build's work ended, and says whether a kill came first — only then is
-// the build killed; an error it ended with on its own is its own outcome.
-func (h *holder) returned(r *running) bool {
-	h.mu.Lock()
-	defer h.mu.Unlock()
-	r.returned = true
-	return r.killed
-}
-
-// said records the outcome announced, and whether it went out, for a kill to answer with.
-func (h *holder) said(r *running, outcome string, announced bool) {
-	h.mu.Lock()
-	r.outcome, r.announced = outcome, announced
-	h.mu.Unlock()
-}
-
-// handlers are the seat's verbs, as this machine answers them.
-func (h *holder) handlers() map[string]link.ToolHandler {
-	return map[string]link.ToolHandler{
-		"current": func(context.Context, json.RawMessage) (any, error) { return h.current(), nil },
-		"kill": func(_ context.Context, raw json.RawMessage) (any, error) {
-			var args struct {
-				ID string `json:"id"`
-			}
-			if err := json.Unmarshal(raw, &args); err != nil || strings.TrimSpace(args.ID) == "" {
-				return nil, errors.New("kill needs the build's id")
-			}
-			said, err := h.kill(strings.TrimSpace(args.ID))
-			if err != nil {
-				return nil, err
-			}
-			return map[string]any{"said": said}, nil
-		},
-		"pause": func(context.Context, json.RawMessage) (any, error) {
-			if err := h.setPaused(true); err != nil {
-				return nil, err
-			}
-			said := h.on + " is paused: it takes no new build until resumed"
-			if c := h.current(); c.Running != nil {
-				said += "; " + c.Running.ID + " runs on and finishes"
-			}
-			return map[string]any{"said": said, "paused": true}, nil
-		},
-		"resume": func(context.Context, json.RawMessage) (any, error) {
-			if err := h.setPaused(false); err != nil {
-				return nil, err
-			}
-			return map[string]any{"said": h.on + " takes builds again", "paused": false}, nil
-		},
-	}
-}
-
-func orNothing(s string) string {
-	if s == "" {
-		return "its start"
-	}
-	return s
-}
-
-// plainRun runs a command outside any build: no line reaches a build's log, because the build whose
-// log it would be is the one being ended.
-func plainRun(ctx context.Context, dir, name string, args ...string) (string, error) {
-	cmd := exec.CommandContext(ctx, name, args...)
-	cmd.Dir = dir
-	out, err := cmd.CombinedOutput()
-	if err != nil {
-		return string(out), fmt.Errorf("%s %s: %w: %s", name, strings.Join(args, " "), err, strings.TrimSpace(string(out)))
-	}
-	return string(out), nil
-}
-
-// announcement is what this holder answers discovery with (novox/hq ADR 0195, ADR 0197): this
-// machine's verbs of the seat, in the shape every tool runtime announces a seat's verb — kind seat,
-// the module answering, the seat, scope node, the machine, its description and argument schema — so
-// the console finds `<node>/node-build-agent.kill` by searching, as it finds any seat's verb.
-//
-// One service per machine, named for the seat and identified by the machine, so the answer is this
-// machine's four verbs and nothing more. The verbs are the compiled seat row's: a build machine has no
-// store, and what it serves is what this binary was built to serve.
-func announcement(seat, module, node string) micro.Info {
-	s, _ := catalogue.SeatNamed(seat)
-	var endpoints []micro.EndpointInfo
-	for _, v := range s.Serves {
-		schema, _ := json.Marshal(v.Input)
-		endpoints = append(endpoints, micro.EndpointInfo{
-			Name:    seat + "__" + v.Name,
-			Subject: link.NodeSeatToolSubject(seat, v.Name, node),
-			// The queue group the verbs are served in, as every runtime announces its own.
-			QueueGroup: "seat." + seat,
-			Metadata: map[string]string{
-				"kind": "seat", "module": module, "tool": v.Name, "seat": seat, "scope": "node",
-				"node": node, "interchangeable": "false", "description": v.Description, "schema": string(schema),
-			},
-		})
-	}
-	return micro.Info{
-		ServiceIdentity: micro.ServiceIdentity{Name: seat, ID: node, Version: "0.1.0",
-			Metadata: map[string]string{"seat": seat, "scope": "node", "node": node, "module": module}},
-		Description: "what the build running on " + node + " is, and ending, pausing and resuming it (novox/hq ADR 0219)",
-		Endpoints:   endpoints,
-	}
-}
-
-// moduleOf is the module a credential was issued for: its user is `<node>.<module>`.
-func moduleOf(user string) string {
-	if _, module, ok := strings.Cut(user, "."); ok && module != "" {
-		return module
-	}
-	return "build-agent"
-}

cmd/mesh-builder/holder_test.go

@@ -1,172 +0,0 @@
-package main
-
-import (
-	"context"
-	"encoding/json"
-	"errors"
-	"strings"
-	"testing"
-
-	"github.com/novox/mesh-controller/internal/link"
-)
-
-// A holder paused stays paused across its restart: the flag is kept in its workspace (novox/hq ADR
-// 0219), and what it says about itself follows.
-func TestAPausedHolderStaysPausedAcrossARestart(t *testing.T) {
-	workspace := t.TempDir()
-	var said []link.HolderState
-	h := newHolder("ace", link.TheBuildMachine, workspace, func(s link.HolderState) error {
-		said = append(said, s)
-		return nil
-	})
-	if h.Paused() {
-		t.Fatal("a new holder starts paused")
-	}
-	if _, err := h.handlers()["pause"](context.Background(), json.RawMessage(`{}`)); err != nil {
-		t.Fatal(err)
-	}
-	if !h.Paused() || len(said) != 1 || !said[0].Paused || said[0].On != "ace" {
-		t.Fatalf("paused: %v, said %+v", h.Paused(), said)
-	}
-	again := newHolder("ace", link.TheBuildMachine, workspace, nil)
-	if !again.Paused() {
-		t.Fatal("restarted, the holder forgot it was paused")
-	}
-	if _, err := again.handlers()["resume"](context.Background(), json.RawMessage(`{}`)); err != nil {
-		t.Fatal(err)
-	}
-	if newHolder("ace", link.TheBuildMachine, workspace, nil).Paused() {
-		t.Fatal("resumed, the holder came back paused")
-	}
-}
-
-// kill ends the build with that id — its context, which ends its commands — removes what it left by
-// label, and refuses an id it is not building.
-func TestKillEndsTheBuildRunningHereAndNoOther(t *testing.T) {
-	h := newHolder("ace", link.TheBuildMachine, t.TempDir(), nil)
-	var removed []string
-	h.remove = func(_ context.Context, _ string, name string, args ...string) (string, error) {
-		removed = append(removed, name+" "+strings.Join(args, " "))
-		if args[0] == "ps" {
-			return "c1\n", nil
-		}
-		return "", nil
-	}
-	kill := h.handlers()["kill"]
-	if _, err := kill(context.Background(), json.RawMessage(`{"id":"build-1"}`)); err == nil {
-		t.Fatal("killed a build while none ran")
-	}
-
-	building, cancel := context.WithCancel(context.Background())
-	r := h.begin(link.BuildRequest{ID: "build-1", Repository: "novox/a"}, cancel)
-	h.stepped(r, "image")
-	if c := h.current(); c.Running == nil || c.Running.ID != "build-1" || c.Running.Step != "image" {
-		t.Fatalf("current says %+v", c)
-	}
-	if _, err := kill(context.Background(), json.RawMessage(`{"id":"build-2"}`)); err == nil ||
-		!strings.Contains(err.Error(), "build-1") {
-		t.Fatalf("killed another id: %v", err)
-	}
-	// The build's own goroutine: it ends when its context does, as a build's commands do, and
-	// announces what came of it.
-	go func() {
-		<-building.Done()
-		if h.returned(r) {
-			h.said(r, link.KilledByHand, true)
-		}
-		h.end(r)
-	}()
-	answer, err := kill(context.Background(), json.RawMessage(`{"id":"build-1"}`))
-	if err != nil {
-		t.Fatal(err)
-	}
-	if building.Err() == nil {
-		t.Fatal("the build's context was not cancelled")
-	}
-	if !r.killed {
-		t.Error("the build is not marked killed, so it would be announced as an ordinary failure")
-	}
-	said := answer.(map[string]any)["said"].(string)
-	if !strings.Contains(said, "2 container(s)") || !strings.Contains(said, "announced as failed") || !strings.Contains(said, link.KilledByHand) {
-		t.Errorf("kill said %q", said)
-	}
-	// Removed at the kill and again once the build had ended: a container made in between is caught.
-	if len(removed) != 4 || !strings.Contains(removed[0], "label=mesh.build=build-1") || !strings.Contains(removed[2], "label=mesh.build=build-1") {
-		t.Errorf("removed %v", removed)
-	}
-	if c := h.current(); c.Running != nil {
-		t.Errorf("after the kill current says %+v", c)
-	}
-}
-
-// A holder announces this machine's verbs of the seat as the console reads a seat's verb, and no more.
-func TestAHolderAnnouncesItsMachinesVerbsForTheConsole(t *testing.T) {
-	info := announcement(link.TheBuildMachine, moduleOf("ace.build-agent"), "ace")
-	if info.Name != "node-build-agent" || info.ID != "ace" || len(info.Endpoints) != 4 {
-		t.Fatalf("announced %s/%s with %d endpoints", info.Name, info.ID, len(info.Endpoints))
-	}
-	kill := info.Endpoints[1]
-	md := kill.Metadata
-	if kill.Subject != "mesh.seat.node-build-agent.tool.kill.ace" || kill.QueueGroup != "seat.node-build-agent" || md["kind"] != "seat" || md["seat"] != "node-build-agent" ||
-		md["scope"] != "node" || md["node"] != "ace" || md["tool"] != "kill" || md["module"] != "build-agent" ||
-		!strings.Contains(md["description"], "killed by hand") || !strings.Contains(md["schema"], `"id"`) {
-		t.Fatalf("kill is announced as %+v", kill)
-	}
-	body, err := json.Marshal(info)
-	if err != nil || len(body) > 8*1024 {
-		t.Fatalf("the answer is %d bytes (%v)", len(body), err)
-	}
-}
-
-// A build that ended on its own as the kill arrived says what it did: the kill is refused, and its
-// own error is its outcome. One whose outcome could not be announced is not said to be settled.
-func TestAKillArrivingAfterTheBuildEndedIsRefusedAndAnUnannouncedKillSaysSo(t *testing.T) {
-	h := newHolder("ace", link.TheBuildMachine, t.TempDir(), nil)
-	h.remove = func(context.Context, string, string, ...string) (string, error) { return "", nil }
-	_, cancel := context.WithCancel(context.Background())
-	r := h.begin(link.BuildRequest{ID: "build-1"}, cancel)
-	if killed := h.returned(r); killed {
-		t.Fatal("a build nobody killed reads as killed")
-	}
-	if _, err := h.kill("build-1"); err == nil || !strings.Contains(err.Error(), "ended on its own") {
-		t.Fatalf("killed a build that had ended: %v", err)
-	}
-	h.end(r)
-
-	building, cancel := context.WithCancel(context.Background())
-	r = h.begin(link.BuildRequest{ID: "build-2"}, cancel)
-	go func() {
-		<-building.Done()
-		if h.returned(r) {
-			h.said(r, link.KilledByHand, false)
-		}
-		h.end(r)
-	}()
-	said, err := h.kill("build-2")
-	if err != nil || strings.Contains(said, "announced as failed") || !strings.Contains(said, "could not be announced") {
-		t.Fatalf("kill said %q (%v)", said, err)
-	}
-}
-
-// **Issue 306**: a holder starting removes the containers earlier builds left on its machine, through
-// the runner a kill uses, and a runtime that cannot be asked does not stop it.
-func TestAHolderStartingRemovesWhatEarlierBuildsLeftHere(t *testing.T) {
-	h := newHolder("novox", link.TheBuildMachine, t.TempDir(), nil)
-	var removed []string
-	h.remove = func(_ context.Context, _ string, name string, args ...string) (string, error) {
-		removed = append(removed, name+" "+strings.Join(args, " "))
-		if args[0] == "ps" {
-			return "c1 build-1\nc2 build-1\nc3 check-here-2\n", nil
-		}
-		return "", nil
-	}
-	if n := h.removeLeftBehind(); n != 2 || len(removed) != 2 || removed[1] != "docker rm -f c1 c2" {
-		t.Fatalf("removed %d: %v", n, removed)
-	}
-	h.remove = func(context.Context, string, string, ...string) (string, error) {
-		return "", errors.New("no runtime")
-	}
-	if n := h.removeLeftBehind(); n != 0 {
-		t.Errorf("a runtime that cannot be asked removed %d", n)
-	}
-}

cmd/mesh-builder/main.go

@@ -1,936 +0,0 @@
-// mesh-builder — the thing a build machine runs.
-//
-// It takes work from the mesh, turns a repository into artifacts, publishes them, and says what
-// came out. It is **not** the control plane and it is **not** the host:
-//
-//   - the control plane decides and never touches a machine. Building runs commands on one, and
-//     what the control plane may send a machine is bounded by the declaration language
-//     (novox/hq ADR 0005). "Run this build" is not in it, and widening the language so it could
-//     be would make the control plane able to run anything anywhere.
-//   - the host applies declarations and holds no opinion about what they contain. A host that
-//     also built things would need a container runtime and git, on every machine, to do something
-//     almost none of them will ever do.
-//
-// So it is a module: a program a machine runs because the mesh told it to, holding its own broker
-// credential and nothing else. Compromise of a build machine is compromise of a build machine.
-package main
-
-import (
-	"context"
-	"encoding/json"
-	"errors"
-	"fmt"
-	"log"
-	"net/url"
-	"os"
-	"os/signal"
-	"sort"
-	"strings"
-	"sync"
-	"sync/atomic"
-	"syscall"
-	"time"
-
-	"github.com/nats-io/nats.go"
-
-	"github.com/novox/mesh-controller/internal/broker"
-	"github.com/novox/mesh-controller/internal/builder"
-	"github.com/novox/mesh-controller/internal/link"
-)
-
-// version is set at build time.
-var version = "development"
-
-func main() {
-	if err := run(); err != nil {
-		fmt.Fprintf(os.Stderr, "mesh-builder: %v\n", err)
-		os.Exit(1)
-	}
-}
-
-const usage = `mesh-builder — builds modules for the mesh
-
-It consumes build requests and answers with what it made. Nothing is listened on and nothing
-is dialled except the broker.
-
-  MESH_BROKER_FILE   a file the mesh sealed to this machine holding the same
-  MESH_REGISTRY      host:port to publish artifacts to, when the mesh has not said
-  MESH_BINDING       a file the mesh wrote saying where the artifact store is
-  MESH_PACKAGE_BINDING  a file the mesh wrote saying where the package registry is
-  MESH_NPM_TOKEN_FILE   a file the mesh sealed holding the token for it
-  MESH_GENESIS_PACKAGE_REGISTRY  the document the installer sealed at genesis, read while no
-                     binding is present (novox/hq ADR 0336)
-  MESH_NPM_REGISTRY  a package registry URL, when the mesh has not said (a person, the bootstrap)
-  MESH_NPM_TOKEN     the token for it, likewise
-  MESH_NPM_SCOPE     the scope it answers for (default: @novox)
-  MESH_WORKSPACE     where to clone and build (default: a temporary directory)
-
-It also builds one module and stops, which is how a mesh is raised — before there is a
-broker to take work from or a registry to publish into:
-
-  mesh-builder build <repository> [--path P] [--ref COMMIT] [--registry HOST:PORT]
-
-Without --registry the artifacts stay in this machine's container runtime, named by the
-digest of their own configuration. The result is printed as JSON.
-
-  mesh-builder ready
-
-exits 0 once the agent running in this container is bound to its build work and pulls it, and
-1 before: its container's health check.
-
-  mesh-builder busy
-
-exits 0 while the agent running in this container has a build in hand, and 1 when it has none;
-from the first ask the agent takes no new build: its container's busy command, asked before the
-container is replaced (novox/hq ADR 0335).
-`
-
-func run() error {
-	if len(os.Args) > 1 {
-		switch os.Args[1] {
-		case "version":
-			fmt.Println(version)
-			return nil
-		case "build":
-			return buildOnce(context.Background(), os.Args[2:])
-		case "ready":
-			// The container's health check (novox/hq issue 544): exits non-zero until the agent takes work, and
-			// once it has been drained longer than its node-engine would wait to replace it (ADR 0335).
-			if err := ready(); err != nil {
-				return err
-			}
-			return drainedTooLong(time.Now())
-		case "busy":
-			// The container's busy command (novox/hq ADR 0335): drains the agent, and exits non-zero once
-			// nothing is in hand.
-			said, err := busy()
-			if err != nil {
-				return err
-			}
-			fmt.Println(said)
-			return nil
-		case "help", "-h", "--help":
-			fmt.Print(usage)
-			return nil
-		default:
-			// **An ask this build does not know fails** (novox/hq ADR 0335): an image older than `busy`, asked
-			// it, must read as idle — exiting 0 would hold its container for the node-engine's whole bound.
-			fmt.Fprint(os.Stderr, usage)
-			return fmt.Errorf("%q is not a command this mesh-builder knows", os.Args[1])
-		}
-	}
-
-	if err := notReady(); err != nil {
-		return err
-	}
-	// **The builder's own version is part of every reuse key** (novox/hq ADR 0350 §1): a builder that builds
-	// differently never takes a build another one made.
-	builder.Version = builder.SelfVersion(version)
-	if err := undrained(); err != nil {
-		return err
-	}
-	credential, err := brokerFrom()
-	if err != nil {
-		return err
-	}
-	registry, err := whereToPublish()
-	if err != nil {
-		return err
-	}
-	workspace := os.Getenv("MESH_WORKSPACE")
-	if workspace == "" {
-		workspace = os.TempDir() + "/mesh-builder"
-	}
-	// **The mesh's name for this machine, not the container's.** A build is reported to the rest
-	// of the mesh, and a report whose origin reads `104cb10e105b` names something no other module
-	// can look up. The mesh already knows the answer and has a way to say it — `${machine:name}`
-	// in the environment file this module is handed — so the hostname is only what is left when
-	// nobody said.
-	on := os.Getenv("MESH_NODE")
-	if on == "" {
-		hostname, err := os.Hostname()
-		if err != nil {
-			return fmt.Errorf("this build machine has no name: nothing said MESH_NODE and the host would not say either: %w", err)
-		}
-		on = hostname
-	}
-
-	ctx, stop := signal.NotifyContext(context.Background(), syscall.SIGINT, syscall.SIGTERM)
-	defer stop()
-
-	js, seat, err := dialFor(credential)
-	if err != nil {
-		return err
-	}
-	defer js.Close()
-
-	// **This machine's holder: paused or not, and the build it is running** (novox/hq ADR 0219). The
-	// paused flag is read from the workspace before anything is taken, so a holder restarted while
-	// paused takes nothing.
-	h := newHolder(on, seat, workspace, func(state link.HolderState) error {
-		body, err := json.Marshal(state)
-		if err != nil {
-			return err
-		}
-		_, err = js.Context().Publish(link.BuildPausedOf(seat, on), body)
-		return err
-	})
-	if h.Paused() {
-		fmt.Fprintf(os.Stderr, "paused (kept in %s): taking no build until resumed\n", pausedFile(workspace))
-	}
-	// **What an earlier holder here left goes before anything is taken** (novox/hq issue 306): a holder
-	// recreated mid-check left the check's store and bus running, and the ask went to another machine.
-	h.removeLeftBehind()
-	// Paused or drained, it takes nothing new (novox/hq ADR 0219, ADR 0335): a drained agent finishes the build
-	// in hand and then says idle, and its container is replaced between builds.
-	machine := link.MachineOverNATSWith(js, on, seat, link.MachineOptions{
-		Paused: func() bool { return h.Paused() || drained() },
-		Taking: func() { taking(seat) },
-		Claim:  claim,
-	})
-	defer machine.Close()
-
-	// The seat's verbs, on this machine's subjects. Only the seat that declares them: the retired
-	// one serves none, and a subscription its holder has no grant for would be refused for ever.
-	if seat == link.TheBuildMachine {
-		stopServing, err := link.OverNATS{Conn: js.Conn()}.ServeNodeSeatTools(seat, on, h.handlers(),
-			log.New(os.Stderr, "", 0))
-		if err != nil {
-			return err
-		}
-		defer stopServing()
-		// And says so, for the console to find (novox/hq ADR 0197).
-		stopAnnouncing, err := link.OverNATS{Conn: js.Conn()}.Announce(
-			announcement(seat, moduleOf(credential.User), on), log.New(os.Stderr, "", 0))
-		if err != nil {
-			return err
-		}
-		defer stopAnnouncing()
-		go h.stateWhilePaused(ctx, time.Hour)
-	}
-
-	fmt.Fprintf(os.Stderr, "building for the mesh, publishing to %s\n", registry)
-	publisher := builder.Registry{Address: registry, Run: builder.Command}
-	// Check builds are let go of after a week (novox/hq ADR 0350 §5).
-	h.scratch = publisher
-	go h.expireChecks(ctx, time.Hour, time.Now)
-
-	return machine.Take(ctx, func(ctx context.Context, work link.Build) {
-		defer released()
-		holding(work.Request().Repository + " (" + work.Request().ID + ")")
-		answer(ctx, publisher, on, workspace, work, h)
-	})
-}
-
-// dialFor opens this machine's link to whichever bus the mesh is on, and says which build seat it
-// holds.
-//
-// **One place chooses**, as everywhere else the bus change went (novox/hq ADR 0116 step 5): a build
-// machine told about both would take work from one and answer on the other, and every log line would
-// say it was fine.
-func dialFor(credential Credential) (*broker.JetStream, string, error) {
-	// **The credential names the bus, and there is one** (novox/hq ADR 0131, design 28 task 5.5).
-	// A credential for the mesh's bus carries user, password and fingerprint beside the address,
-	// and that is enough to dial it, pinned.
-	if !credential.onTheNewBus() {
-		return nil, "", fmt.Errorf("the credential at hand names %q, which is not the mesh's bus", credential.URL)
-	}
-	// Named for what it is, not the controller whose code dials it (novox/hq issue 327).
-	host, _ := os.Hostname()
-	js, err := broker.DialPinned(credential.natsURL(), credential.Fingerprint, nats.Name("build agent on "+host))
-	if err != nil {
-		return nil, "", err
-	}
-	// **The seat this machine serves is the one its credential claims** (novox/hq ADR 0190, the
-	// handover): the mesh issues a build machine's credential naming the seat its module claims,
-	// and one binary serves the old role as `builder` and the new as `build-agent` from that alone.
-	seat := link.BuildSeatClaimed(credential.seatsClaimed())
-	fmt.Fprintf(os.Stderr, "taking build work as a holder of %s\n", seat)
-	return js, seat, nil
-}
-
-// answer does one build and says what happened, whichever way it went.
-func answer(ctx context.Context, publisher builder.Publisher, on, workspace string, work link.Build, h *holder) {
-	request := work.Request()
-
-	// **Its own context, so it can be killed alone** (novox/hq ADR 0219): cancelled by `kill`, it ends
-	// this build's commands and nothing else; the machine's own context ending — a SIGTERM — still
-	// reaches it through the parent, and that keeps today's meaning below.
-	building, cancel := context.WithCancel(ctx)
-	defer cancel()
-	var mine *running
-	if h != nil {
-		mine = h.begin(request, cancel)
-		defer h.end(mine)
-	}
-
-	// **First thing, and to stdout.** A build request that arrives and produces no visible line until
-	// it either finishes or fails is indistinguishable from one that never arrived — which cost a long
-	// diagnosis against a running mesh, chasing "the handler never fired" when the truth was only that
-	// the handler said nothing until the end.
-	fmt.Fprintf(os.Stderr, "a build request arrived for %s (%s)\n", request.Repository, request.ID)
-
-	// **Everything a build says goes two ways**: to stderr, as always, and onto the bus as the
-	// role's own events under the build's id (novox/hq ADR 0157) — so whoever asked, and anybody
-	// watching, reads the same lines this container's log holds, live, and after the fact from the
-	// stream. Said first, before anything runs, so a build that hangs is one that visibly started.
-	// One line at a time: a check's builds for its merge say their lines while its tests say theirs (novox/hq
-	// issue 716).
-	var saying sync.Mutex
-	say := func(step, message string) {
-		saying.Lock()
-		defer saying.Unlock()
-		fmt.Fprintf(os.Stderr, "  [%s] %s\n", step, message)
-		work.Say(step, message)
-		if mine != nil && step != "run" && step != "output" {
-			h.stepped(mine, step)
-		}
-	}
-	builder.Said = say
-	defer func() { builder.Said = nil }()
-	if err := work.Began(ctx); err != nil {
-		fmt.Fprintf(os.Stderr, "cannot say a build started: %v\n", err)
-	}
-	// **A running check watches its pull request's key** (novox/hq ADR 0406 §4, issue 974): when the head or the trunk
-	// commit in it moves, the check is for a state nobody wants any more, and ends itself — nothing is asked of the forge
-	// (issue 726). A group's check, a try and a build watch nothing.
-	var superseded atomic.Bool
-	if w, ok := work.(interface {
-		WatchPull(context.Context, func(link.PullKey)) (func(), error)
-	}); ok && request.Check != nil {
-		stopWatching, err := w.WatchPull(building, func(k link.PullKey) {
-			superseded.Store(true)
-			say("superseded", fmt.Sprintf("the pull request's key moved to %.12s on %.12s while this checked %.12s on %.12s: stopped",
-				k.Head, k.Trunk, request.Ref, request.Check.Trunk))
-			cancel()
-		})
-		if err != nil {
-			fmt.Fprintf(os.Stderr, "the key of %s/%s#%d could not be watched, so its check runs on if the key moves: %v\n",
-				request.Check.Owner, request.Check.Repo, request.Check.Number, err)
-		} else {
-			defer stopWatching()
-		}
-	}
-
-	result := link.BuildResult{
-		ID: request.ID, Repository: request.Repository, Path: request.Path,
-		Ref: request.Ref, On: on, Source: request.Source, DryRun: request.DryRun,
-	}
-	what := "building " + request.Repository
-	if request.Path != "" {
-		what += " at " + request.Path
-	}
-	if request.Ref != "" {
-		what += " on " + request.Ref
-	}
-	say("build", what)
-
-	npmrc, err := packagesFrom(on)
-	if err == nil {
-		say("packages", saysRegistry(npmrc))
-	}
-	registryHere, isRegistry := publisher.(builder.Registry)
-	var built builder.Result
-	if request.Check != nil {
-		// **A pull request's merge check, not a build** (novox/hq to-be 45 §9): nothing is built,
-		// published or registered; the verdict is the outcome.
-		result.Checked = request.Check
-		registry := ""
-		if r, ok := publisher.(builder.Registry); ok {
-			registry = r.Address
-		}
-		spec := checkSpecOf(request)
-		// The judge cache the build agent declares as its own data, never in the workspace: only judge builds and
-		// mesh-lab's replays mount it, never a check's containers, so no pull request's script can write what a judge
-		// is built with or kept as, or what the replays run (novox/hq ADR 0358 §6, issue 709).
-		spec.JudgeCache = judgeCache()
-		// What the merge would move, built by the check for the walk to take (novox/hq ADR 0350 §1): into the
-		// scratch namespace. **Never with the package registry's credential**: this is code nobody has approved
-		// yet, and a recipe could read the credential it is handed (issue 462). A module that resolves packages
-		// at build time has no reuse key anyway, so nothing is lost by refusing it here.
-		if isRegistry && len(spec.Builds) > 0 {
-			spec.BuildWith = &builder.CheckBuilding{Publish: publisher, Scratch: registryHere, Held: request.Held,
-				Running: request.Check.Running, Seats: request.Seats, Named: namedOf(request.Check.Named)}
-		}
-		var v builder.CheckVerdict
-		v, err = builder.Check(building, builder.Command, spec, workspace, registry, forgeFrom(), say)
-		if err == nil {
-			result.Check = &link.CheckOutcome{Verdict: v.Verdict, Summary: v.Summary, Report: v.Report,
-				Took: v.Took.Round(time.Second).String(), Gate: layerOf(v.Gate), RepoCheck: layerOf(v.Repo),
-				Head: v.Head, Trunk: v.Trunk, Beside: v.Beside, Built: checkBuiltOf(v.Built),
-				Validator: v.Validator, Siblings: siblingsOut(v.Siblings), SiblingsUnknown: v.SiblingsUnknown, JudgeFrom: v.JudgeFrom}
-			// What each of a group's heads was judged as (novox/hq ADR 0323 §6).
-			for _, m := range v.Members {
-				result.Check.Members = append(result.Check.Members, link.CheckedMember{Owner: m.Owner, Repo: m.Repo,
-					Commit: m.Head, Trunk: m.Trunk})
-			}
-			// A branch tried before its pull request reads its outcome from this log, whole (novox/hq issue 686).
-			if request.Check.Try {
-				if line, err := json.Marshal(triedOf(v)); err == nil {
-					say(link.StepTried, string(line))
-				}
-			}
-		}
-	} else if err == nil {
-		// The package-registry credential is a build input, so it is resolved before the clone: a
-		// build that could not have resolved its dependencies is refused in front of the reason, not
-		// after a clone that then fails at npm ci.
-		// Every container it starts is labelled with its id, so a kill finds what outlived the
-		// docker client (ADR 0219).
-		if request.Reuse != nil && isRegistry && !request.DryRun {
-			// **A walk's build takes the check's build of the same key** (novox/hq ADR 0350 §2).
-			reuse := builder.Reuse{Scratch: registryHere}
-			for _, p := range request.Reuse.Pulls {
-				reuse.Pulls = append(reuse.Pulls, builder.PullRef{Owner: p.Owner, Repo: p.Repo, Number: p.Number})
-			}
-			// Only what a verdict names is taken (ADR 0350 §2).
-			reuse.Named = namedOf(request.Reuse.Builds)
-			built, err = builder.BuildReusing(building, builder.Labelled(builder.Command, request.ID), publisher, reuse,
-				request.Repository, request.Path, request.Ref, workspace, request.Held, npmrc,
-				forgeFrom(), say, request.Seats)
-		} else {
-			built, err = builder.Build(building, builder.Labelled(builder.Command, request.ID), publisher,
-				request.Repository, request.Path, request.Ref, workspace, request.Held, npmrc,
-				forgeFrom(), say, request.Seats)
-		}
-	}
-	// What it copied into the store, whatever became of the build (novox/hq ADR 0257).
-	result.Mirrored = built.Mirrored
-	// Only a build the kill ended: the kill came before its work did. One that finished — built, or
-	// failed on its own — in the moment the kill arrived says what it did, and the kill is refused.
-	killed := false
-	if mine != nil {
-		killed = h.returned(mine) && err != nil
-	}
-	if superseded.Load() && err != nil {
-		// Ended by its own key moving on (ADR 0406 §4): said as the check's failure, as a kill is.
-		result.Failed = link.SupersededByKey
-		say("failed", link.SupersededByKey)
-	} else if killed {
-		// **Killed by hand is the outcome, whatever the build was doing** (novox/hq ADR 0219): the
-		// error it ended with is the kill's consequence, not a fault of the source.
-		result.Failed = link.KilledByHand
-		say("failed", link.KilledByHand)
-	} else if err != nil {
-		// A failure is a result. A build that fails and says nothing is indistinguishable from a
-		// builder that is not running, and those want completely different responses.
-		result.Failed = err.Error()
-		say("failed", err.Error())
-	} else if request.Check != nil {
-		say("checked", result.Check.Verdict+": "+result.Check.Summary)
-	} else {
-		manifest, marshalErr := json.Marshal(built.Manifest)
-		if marshalErr != nil {
-			result.Failed = marshalErr.Error()
-		} else {
-			result.Commit = built.Commit
-			result.Manifest = manifest
-			for _, made := range built.Built {
-				result.Made = append(result.Made, link.MadeArtifact{
-					Name: made.Name, Kind: made.Kind, Reference: made.Reference,
-				})
-			}
-			result.Against = built.Against
-			result.SourceFingerprint = built.Source
-			result.SourceInputs = built.SourceInputs
-			// What the walk did instead of building, or why it built (novox/hq ADR 0350 §3, §4).
-			result.ReuseKey = built.ReuseKey
-			if built.Reused != nil {
-				f := built.Reused.From
-				result.Reused = built.Reused.Words()
-				result.ReusedFrom = &link.ReusedFrom{Pull: link.PullRef{Owner: f.Pull.Owner, Repo: f.Pull.Repo,
-					Number: f.Pull.Number}, Head: f.Head, Trunk: f.Trunk, Check: f.Check, Key: f.Key}
-			} else if request.Reuse != nil {
-				result.BuiltWhy = built.Why
-				if result.BuiltWhy == "" {
-					result.BuiltWhy = "it has no artifact to build"
-				}
-			}
-			result.Trunk, result.OnTrunk, result.Branches = built.Trunk, built.OnTrunk, built.Branches
-			for _, r := range built.Read {
-				result.Read = append(result.Read, link.ReadRepository{Repository: r.Repository, Ref: r.Ref})
-			}
-			for _, s := range built.Sources {
-				result.Sources = append(result.Sources, link.BuildSource{Repository: s.Repository, Ref: s.Ref, Paths: s.Paths})
-			}
-			// The list of predefined keys the manifest was judged against, for the controller to publish
-			// (novox/hq ADR 0348 §7).
-			if p := built.Predefined; p != nil {
-				result.Predefined = &link.PredefinedList{Keys: p.Keys, Generation: p.Generation}
-			}
-			say("built", built.Manifest.Module+" from "+short(built.Commit))
-		}
-	}
-
-	// A killed build is announced on a context of its own: the build's was the one cancelled, and the
-	// outcome must go out and the ask be settled — acknowledged, never redelivered to another machine
-	// to be built again. A machine being stopped is the other case and keeps its meaning: the
-	// parent's context is gone, nothing is announced or settled, and the ask is redelivered.
-	announcing := ctx
-	if killed {
-		fresh, stop := context.WithTimeout(context.Background(), 30*time.Second)
-		defer stop()
-		announcing = fresh
-	}
-	announceErr := work.Announce(announcing, result)
-	if mine != nil {
-		h.said(mine, result.Failed, announceErr == nil)
-	}
-	if err := announceErr; err != nil {
-		// Said, not fatal: the build happened. A build reported as failed because announcing it
-		// failed is a lie about work that was done — and the request stays unsettled below only if
-		// nothing was said at all, so another machine can try.
-		fmt.Fprintf(os.Stderr, "cannot say what came of a build: %v\n", err)
-		return
-	}
-
-	// Settled only once the outcome is away, so a machine that dies before answering leaves the work
-	// for another rather than losing it.
-	if err := work.Done(); err != nil {
-		fmt.Fprintf(os.Stderr, "the outcome is away and the request could not be settled: %v\n", err)
-	}
-}
-
-// checkSpecOf is a check request as the builder runs it.
-func checkSpecOf(request link.BuildRequest) builder.CheckSpec {
-	c := request.Check
-	spec := builder.CheckSpec{ID: request.ID, Repository: request.Repository, Ref: request.Ref,
-		Owner: c.Owner, Repo: c.Repo, Number: c.Number, Paths: c.Paths, Beside: map[string]builder.Beside{},
-		Modules: c.Modules, New: c.New, Manifests: c.Manifests, Judge: c.Judge, Base: c.Base,
-		Toolchain: builder.ToolchainOf(request.Held), Toolchains: builder.ToolchainsOf(request.Held),
-		Tests: c.Tests, StoreOnly: c.StoreOnly, SiblingsUnknown: c.SiblingsUnknown}
-	for _, s := range c.Siblings {
-		spec.Siblings = append(spec.Siblings, builder.Sibling{Repository: s.Repository, Number: s.Number, Head: s.Head,
-			Base: s.Base, Dir: s.Dir})
-	}
-	for dir, b := range c.Beside {
-		spec.Beside[dir] = builder.Beside{Repository: b.Repository, Ref: b.Ref}
-	}
-	for _, b := range c.Builds {
-		spec.Builds = append(spec.Builds, builder.CheckBuildSpec{Module: b.Module, Repository: b.Repository, Path: b.Path,
-			Ref: b.Ref, Merged: b.Merged, Tier: b.Tier, Skip: b.Skip})
-	}
-	for _, m := range c.Members {
-		spec.Group = append(spec.Group, builder.GroupHead{Owner: m.Owner, Repo: m.Repo, Repository: m.Repository,
-			Ref: m.Ref, Paths: m.Paths, Base: m.Base})
-	}
-	return spec
-}
-
-// siblingsOut is the siblings a check read as the outcome carries them (novox/hq ADR 0382 §4).
-func siblingsOut(read []builder.JudgedSibling) []link.CheckSibling {
-	var out []link.CheckSibling
-	for _, s := range read {
-		out = append(out, link.CheckSibling{Repository: s.Repository, Number: s.Number, Head: s.Head, Base: s.Base,
-			BaseCommit: s.BaseCommit})
-	}
-	return out
-}
-
-// judgeCache is the judge cache the build agent's manifest declares (MESH_JUDGE_CACHE, novox/hq ADR 0358 §6): a
-// directory mounted at the same path on the host, so a judge build's mounts name what the agent sees. Empty when the
-// agent declares none, and every judge is then built cold under its check's root.
-func judgeCache() string { return os.Getenv("MESH_JUDGE_CACHE") }
-
-// triedOf is a try's outcome as its log line says it (novox/hq issue 686): the repository's own check's verdict,
-// or the check's where that did not run — a head that does not merge — and the lines naming what failed.
-func triedOf(v builder.CheckVerdict) link.Tried {
-	t := link.Tried{Verdict: v.Verdict, Summary: v.Summary, Took: v.Took.Round(time.Second).String(),
-		Head: v.Head, Trunk: v.Trunk}
-	if v.Repo != nil && (v.Gate == nil || v.Gate.Verdict == "pass") {
-		t.Verdict, t.Summary = v.Repo.Verdict, v.Repo.Summary
-	}
-	if v.Repo != nil && v.Repo.Failed != "" {
-		t.Failed = strings.Split(v.Repo.Failed, "\n")
-	}
-	if t.Verdict == "" {
-		t.Verdict = "error"
-	}
-	return t
-}
-
-// namedOf are the builds the seat's verdicts name, as the builder believes a scratch record by them (novox/hq ADR
-// 0350 §2, issue 703): each module's key with every artifact's digest.
-func namedOf(builds []link.CheckedBuild) []builder.NamedBuild {
-	var out []builder.NamedBuild
-	for _, b := range builds {
-		named := builder.NamedBuild{Pull: builder.PullRef{Owner: b.Pull.Owner, Repo: b.Pull.Repo,
-			Number: b.Pull.Number}, Check: b.Check, Module: b.Built.Module, Key: b.Built.Key,
-			Digests: map[string]string{}}
-		for _, m := range b.Built.Made {
-			named.Digests[m.Name] = builder.DigestOf(m.Reference)
-		}
-		out = append(out, named)
-	}
-	return out
-}
-
-// checkBuiltOf is a check's builds for its merge as the outcome carries them (novox/hq ADR 0350 §1).
-func checkBuiltOf(built []builder.CheckBuilt) []link.CheckBuilt {
-	var out []link.CheckBuilt
-	for _, b := range built {
-		c := link.CheckBuilt{Module: b.Module, Key: b.Key, NotBuilt: b.NotBuilt, Took: b.Took.Round(time.Second).String(),
-			Kept: b.Kept, Same: b.Same, SameAs: b.SameAs}
-		for _, m := range b.Made {
-			c.Made = append(c.Made, link.MadeArtifact{Name: m.Name, Kind: m.Kind, Reference: m.Reference})
-		}
-		out = append(out, c)
-	}
-	return out
-}
-
-// layerOf is one layer of a check as the outcome carries it.
-func layerOf(l *builder.Layer) *link.CheckLayer {
-	if l == nil {
-		return nil
-	}
-	return &link.CheckLayer{Verdict: l.Verdict, Summary: l.Summary, Modules: l.Modules}
-}
-
-// packagesFrom is where a build resolves the mesh's own published packages — the SDK above all
-// (novox/hq ADR 0076, issue 053) — on this machine.
-//
-// **The binding wins, then the genesis document** (novox/hq ADR 0336 §3, §4). The build agent's
-// npm-package-registry requirement is optional: on genesis's node, before the gitea module is assigned,
-// nothing provides it, and the installer sealed the forge it raised to this agent as one document
-// instead. Once the requirement binds, the binding names the endpoint the way the artifact store's
-// does and a sealed token file the credential, and the genesis document is left unread. A binding
-// file named and absent is a requirement not bound here, never a fault: the environment names the
-// path whether or not the mesh wrote it.
-//
-// The environment variables remain for a builder run by a person. With none of the three the result
-// is disabled and says this machine, so a build that needs the registry is refused naming it (§6),
-// and a build that needs none builds anyway.
-func packagesFrom(machine string) (builder.Npmrc, error) {
-	scope := strings.TrimSpace(os.Getenv("MESH_NPM_SCOPE"))
-	if scope == "" {
-		scope = "@novox"
-	}
-	none := builder.Npmrc{Machine: machine}
-
-	if path := strings.TrimSpace(os.Getenv("MESH_PACKAGE_BINDING")); path != "" {
-		raw, err := os.ReadFile(path)
-		switch {
-		case errors.Is(err, os.ErrNotExist):
-			// Not bound on this machine: the genesis document, or nothing.
-		case err != nil:
-			return none, fmt.Errorf("cannot read what the mesh said about the package registry: %w", err)
-		default:
-			return fromBinding(path, raw, scope, machine)
-		}
-	}
-	if path := strings.TrimSpace(os.Getenv("MESH_GENESIS_PACKAGE_REGISTRY")); path != "" {
-		raw, err := os.ReadFile(path)
-		switch {
-		case errors.Is(err, os.ErrNotExist):
-			// Not this mesh's genesis node, or the installer has not sealed it yet.
-		case err != nil:
-			return none, fmt.Errorf("cannot read the genesis document for the package registry: %w", err)
-		default:
-			return fromGenesis(path, raw, scope, machine)
-		}
-	}
-
-	// A builder run by a person.
-	registry := strings.TrimSpace(os.Getenv("MESH_NPM_REGISTRY"))
-	secret := strings.TrimSpace(os.Getenv("MESH_NPM_TOKEN"))
-	username := strings.TrimSpace(os.Getenv("MESH_NPM_USER"))
-	if registry == "" && secret == "" {
-		return none, nil
-	}
-	n := builder.Npmrc{Scope: scope, Registry: registry, From: builder.FromEnvironment, Machine: machine}
-	if username != "" {
-		n.Username, n.Password = username, secret
-	} else {
-		n.Token = secret
-	}
-	return n, nil
-}
-
-// fromBinding composes the registry from the npm-package-registry binding the mesh wrote and the
-// credential it sealed beside it. The mesh authenticates the ordinary way — a generated password the
-// provider only applies (novox/hq ADR 0048) — so with a username the secret is a password (basic
-// auth); without one it is a bearer token a provider minted.
-func fromBinding(path string, raw []byte, scope, machine string) (builder.Npmrc, error) {
-	none := builder.Npmrc{Machine: machine}
-	var told struct {
-		From   string         `json:"from"`
-		At     string         `json:"at"`
-		As     string         `json:"as"`
-		Serves map[string]any `json:"serves"`
-	}
-	if err := json.Unmarshal(raw, &told); err != nil {
-		return none, fmt.Errorf("%s is not a binding: %w", path, err)
-	}
-	if told.At == "" {
-		return none, fmt.Errorf(
-			"%s says the package registry is on %q and gives no address for it", path, told.From)
-	}
-	// Composed from what the provider serves, so nothing here knows gitea's URL shape from
-	// another registry's: it states its port, the path its registry answers on, and the scheme.
-	scheme := "https"
-	if s, ok := told.Serves["scheme"]; ok {
-		scheme = fmt.Sprintf("%v", s)
-	}
-	port, ok := told.Serves["port"]
-	if !ok {
-		return none, fmt.Errorf("%s says nothing about which port the package registry answers on", path)
-	}
-	npmPath, ok := told.Serves["npm-path"]
-	if !ok {
-		return none, fmt.Errorf("%s says nothing about the path the package registry answers on", path)
-	}
-	secret := strings.TrimSpace(os.Getenv("MESH_NPM_TOKEN"))
-	if file := strings.TrimSpace(os.Getenv("MESH_NPM_TOKEN_FILE")); file != "" {
-		raw, err := os.ReadFile(file)
-		if err != nil {
-			return none, fmt.Errorf("cannot read this builder's package-registry credential: %w", err)
-		}
-		secret = strings.TrimSpace(string(raw))
-	}
-	n := builder.Npmrc{Scope: scope, Registry: fmt.Sprintf("%s://%s:%v%v", scheme, told.At, port, npmPath),
-		From: builder.FromBinding, Machine: machine}
-	if told.As != "" {
-		n.Username, n.Password = told.As, secret
-	} else {
-		n.Token = secret
-	}
-	return n, nil
-}
-
-// GenesisRegistry is the genesis document (novox/hq ADR 0336 §3): what the installer sealed to the
-// build agent on its node at genesis's packages step, as the `genesis-package-registry` own-secret —
-// the forge it raised, the port this node gave the package registry, its npm path, and the account it
-// made with that account's password. mesh-host writes it; the field names are the two repositories'
-// agreement.
-type GenesisRegistry struct {
-	Scheme   string `json:"scheme"`
-	At       string `json:"at"`
-	Port     int    `json:"port"`
-	NpmPath  string `json:"npm-path"`
-	As       string `json:"as"`
-	Password string `json:"password"`
-}
-
-// fromGenesis composes the registry from the genesis document.
-func fromGenesis(path string, raw []byte, scope, machine string) (builder.Npmrc, error) {
-	none := builder.Npmrc{Machine: machine}
-	var g GenesisRegistry
-	if err := json.Unmarshal(raw, &g); err != nil {
-		return none, fmt.Errorf("%s is not the genesis document for the package registry: %w", path, err)
-	}
-	var missing []string
-	for name, value := range map[string]string{"at": g.At, "npm-path": g.NpmPath, "as": g.As, "password": g.Password} {
-		if strings.TrimSpace(value) == "" {
-			missing = append(missing, name)
-		}
-	}
-	if g.Port <= 0 {
-		missing = append(missing, "port")
-	}
-	if len(missing) > 0 {
-		sort.Strings(missing)
-		return none, fmt.Errorf("%s, the genesis document for the package registry, says nothing of %s",
-			path, strings.Join(missing, ", "))
-	}
-	scheme := g.Scheme
-	if scheme == "" {
-		scheme = "http"
-	}
-	return builder.Npmrc{Scope: scope, Registry: fmt.Sprintf("%s://%s:%d%s", scheme, g.At, g.Port, g.NpmPath),
-		Username: g.As, Password: g.Password, From: builder.FromGenesis, Machine: machine}, nil
-}
-
-// saysRegistry is the line each build's log carries about the package registry (novox/hq ADR 0336
-// §4): which of the binding and the genesis document it resolved from, or that it has neither here.
-func saysRegistry(n builder.Npmrc) string {
-	if n.Enabled() {
-		return "the package registry is resolved from " + n.From
-	}
-	machine := n.Machine
-	if machine == "" {
-		machine = "this machine"
-	}
-	return fmt.Sprintf("no package registry: %s is unbound on %s and no genesis document is here; "+
-		"a build needing it is refused", builder.RegistryRequirement, machine)
-}
-
-// forgeFrom is the git credential this builder may offer a clone, composed from the same binding
-// and sealed secret its package-registry half already reads: the forge that answers npm is the
-// forge that hosts the repositories, and its provisioner applies one password to one user for
-// both. Anything missing means no credential, and every clone stays anonymous — which is all a
-// mesh of public repositories ever needs.
-//
-// The URL names the binding's own address — the machine the mesh says the forge is on — so a
-// private repository is registered and built by that address, and a clone of anything else is
-// never shown this credential (git's credential store matches the whole origin).
-func forgeFrom() builder.GitCredential {
-	path := strings.TrimSpace(os.Getenv("MESH_PACKAGE_BINDING"))
-	if path == "" {
-		return builder.GitCredential{}
-	}
-	raw, err := os.ReadFile(path)
-	if err != nil {
-		return builder.GitCredential{}
-	}
-	var told struct {
-		At     string         `json:"at"`
-		As     string         `json:"as"`
-		Serves map[string]any `json:"serves"`
-	}
-	if err := json.Unmarshal(raw, &told); err != nil || told.At == "" || told.As == "" {
-		return builder.GitCredential{}
-	}
-	secret := strings.TrimSpace(os.Getenv("MESH_NPM_TOKEN"))
-	if file := strings.TrimSpace(os.Getenv("MESH_NPM_TOKEN_FILE")); file != "" {
-		if raw, err := os.ReadFile(file); err == nil {
-			secret = strings.TrimSpace(string(raw))
-		}
-	}
-	if secret == "" {
-		return builder.GitCredential{}
-	}
-	scheme := "https"
-	if s, ok := told.Serves["scheme"]; ok {
-		scheme = fmt.Sprintf("%v", s)
-	}
-	host := told.At
-	if port, ok := told.Serves["port"]; ok {
-		host = fmt.Sprintf("%s:%v", told.At, port)
-	}
-	made := url.URL{Scheme: scheme, User: url.UserPassword(told.As, secret), Host: host}
-	return builder.GitCredential{URL: made.String()}
-}
-
-func short(commit string) string {
-	if len(commit) > 8 {
-		return commit[:8]
-	}
-	return commit
-}
-
-// whereToPublish is the artifact store this builder uses.
-//
-// **Preferably from the mesh.** A builder that is a module requires an artifact store, and the
-// mesh writes it a file saying which machine answers that and on what port — the same binding any
-// consumer of any provision gets. Reading it means the address is not a setting somebody keeps in
-// step by hand, and moving the store is an ordinary reassignment rather than an edit on every
-// build machine.
-//
-// The environment variable remains for a builder run by a person, which is how this started and
-// how it is still run while being developed.
-func whereToPublish() (string, error) {
-	binding := strings.TrimSpace(os.Getenv("MESH_BINDING"))
-	if binding == "" {
-		registry := strings.TrimSpace(os.Getenv("MESH_REGISTRY"))
-		if registry == "" {
-			return "", fmt.Errorf("neither MESH_BINDING nor MESH_REGISTRY: a built artifact " +
-				"nobody can fetch is not built")
-		}
-		return registry, nil
-	}
-
-	raw, err := os.ReadFile(binding)
-	if err != nil {
-		return "", fmt.Errorf("cannot read what the mesh said about the artifact store: %w", err)
-	}
-	var told struct {
-		From   string         `json:"from"`
-		At     string         `json:"at"`
-		Serves map[string]any `json:"serves"`
-	}
-	if err := json.Unmarshal(raw, &told); err != nil {
-		return "", fmt.Errorf("%s is not a binding: %w", binding, err)
-	}
-	if told.At == "" {
-		// The provider is not on the private network, so there is no name to reach it by. Said
-		// rather than falling back to the machine's own name, which would publish to a store on
-		// the wrong machine and be found out much later.
-		return "", fmt.Errorf(
-			"%s says the artifact store is on %q and gives no address for it", binding, told.From)
-	}
-	port, ok := told.Serves["port"]
-	if !ok {
-		return "", fmt.Errorf("%s says nothing about which port the artifact store answers on",
-			binding)
-	}
-	return fmt.Sprintf("%s:%v", told.At, port), nil
-}
-
-// brokerFrom is where this builder connects, and with what.
-//
-// **Preferably from a file the mesh sealed to this machine.** A builder that is a module is given
-// its credential the way every other module is given one: generated or accepted centrally, sealed
-// to the machine, written by the host. Putting it in an environment variable instead would mean
-// the one copy that matters passing through a terminal and a process listing.
-//
-// The variable remains for a builder run by a person.
-func brokerFrom() (Credential, error) {
-	if path := strings.TrimSpace(os.Getenv("MESH_BROKER_FILE")); path != "" {
-		raw, err := os.ReadFile(path)
-		if err != nil {
-			return Credential{}, fmt.Errorf("cannot read this builder's credential: %w", err)
-		}
-		said := strings.TrimSpace(string(raw))
-		if said == "" {
-			// An empty credential file is a machine that will connect as nobody and be refused,
-			// with the reason three layers away.
-			return Credential{}, fmt.Errorf("%s is empty, so this builder has no credential", path)
-		}
-		var held Credential
-		if err := json.Unmarshal([]byte(said), &held); err == nil && held.URL != "" {
-			return held, nil
-		}
-		// A file holding only a URL, which is what a person writing one by hand produces. The
-		// broker is then verified against whatever this machine already trusts.
-		return Credential{URL: said}, nil
-	}
-	return Credential{}, fmt.Errorf(
-		"no MESH_BROKER_FILE: a build machine with no credential for the bus has nothing to build")
-}
-
-// Credential is what a build machine is given so it can reach the broker.
-//
-// Two things, because reaching a broker over TLS needs both: who to connect as, and what to check
-// the certificate against. A mesh's broker presents a certificate of the mesh's own, which is in
-// no public trust store, so a URL alone can only connect to a broker somebody else vouches for.
-//
-// **The same shape a node gets, for the same reason** (novox/hq ADR 0004): the fingerprint travels
-// out of band — here, sealed with the credential — and the endpoint is verified once at connect.
-type Credential struct {
-	URL         string `json:"url"`
-	Fingerprint string `json:"fingerprint,omitempty"`
-	// User and Password ride beside the address on the bus being built (design 25): a credential
-	// embedded in a URL leaks into every log line that prints a connection, so the mesh seals them
-	// as two fields and this machine joins them once, here, to dial.
-	User     string `json:"user,omitempty"`
-	Password string `json:"password,omitempty"`
-	// Claims are the seats the module this credential was issued for claims, as the mesh writes
-	// them beside the credential (novox/hq ADR 0159). The first is the build role this machine
-	// serves; a credential naming none is from before claims travelled in it.
-	Claims []struct {
-		Seat string `json:"seat"`
-	} `json:"claims,omitempty"`
-}
-
-// seatsClaimed is the seats the credential names, in order.
-func (c Credential) seatsClaimed() []string {
-	out := make([]string, 0, len(c.Claims))
-	for _, claim := range c.Claims {
-		out = append(out, claim.Seat)
-	}
-	return out
-}
-
-// onTheNewBus is whether a credential is for the bus being built: its address says so, and the
-// mesh only ever seals such a credential with the user and password beside it.
-func (c Credential) onTheNewBus() bool { return strings.HasPrefix(strings.TrimSpace(c.URL), "nats://") }
-
-// natsURL is the address with this machine's credential in it, for the one dial that needs it.
-func (c Credential) natsURL() string {
-	rest := strings.TrimPrefix(strings.TrimSpace(c.URL), "nats://")
-	if c.User == "" {
-		return "nats://" + rest
-	}
-	return "nats://" + c.User + ":" + c.Password + "@" + rest
-}

cmd/mesh-builder/once.go

@@ -1,188 +0,0 @@
-package main
-
-import (
-	"context"
-	"encoding/json"
-	"errors"
-	"flag"
-	"fmt"
-	"os"
-	"strings"
-
-	"github.com/novox/mesh-controller/internal/builder"
-)
-
-// buildOnce is the builder doing one build and stopping, with no broker and no mesh.
-//
-// **This is how a mesh is raised** (novox/hq ADR 0073). The installer carries this program and runs
-// it once, before anything else exists, to produce the control plane from the same repository and
-// path that every later rebuild of it will use. What raises the mesh is therefore the same thing
-// that maintains it — not a second mechanism that has to be kept in step with the first and is
-// exercised once per new mesh, which is how often enough to rot.
-//
-// It takes no work from a queue and answers nobody: there is no broker yet, and the only thing
-// waiting for the answer is the installer that started it. So the result goes to standard output as
-// JSON, which is what the installer reads.
-//
-// With no --registry it publishes nowhere and the image stays in this machine's container runtime,
-// named by the digest of its own configuration (see builder.Local). That is the genesis case. With
-// one, it publishes as it always does — the same command is how an operator builds a module by hand
-// on a mesh that already exists.
-func buildOnce(ctx context.Context, args []string) error {
-	set := flag.NewFlagSet("build", flag.ContinueOnError)
-	path := set.String("path", "", "the module's directory inside the repository (default: its root)")
-	ref := set.String("ref", "", "the commit to build; a branch is a moving target somebody else controls")
-	registry := set.String("registry", "",
-		"host:port to publish to. Without it the artifacts stay in this machine's container runtime, which is the genesis case")
-	workspace := set.String("workspace", "", "where to clone and build (default: a temporary directory)")
-	on := multiple(set, "on",
-		"a base this build stands on, as <module>/<artifact>=<reference>. Repeatable")
-	positionals, err := parseAround(set, args)
-	if err != nil {
-		return err
-	}
-	if len(positionals) != 1 {
-		return errors.New("mesh-builder build <repository> [--path P] [--ref COMMIT] [--registry HOST:PORT]")
-	}
-	repository := positionals[0]
-
-	where := *workspace
-	if where == "" {
-		where = os.TempDir() + "/mesh-builder-once"
-	}
-
-	// What this build may stand on, said on the command line because there is no mesh to ask.
-	//
-	// **This is the genesis case and it is meant to be awkward.** On a running mesh the control
-	// plane answers this, because only it knows what this mesh holds. Here nothing has been built
-	// yet, so whoever runs this says what to use — and for the control plane, which is the one
-	// module raised before anything else exists, the answer is ordinarily nothing at all.
-	bases := map[string]string{}
-	for _, pair := range *on {
-		key, reference, found := strings.Cut(pair, "=")
-		if !found || key == "" || reference == "" {
-			return fmt.Errorf(
-				"--on takes <module>/<artifact>=<reference>, and %q is not that", pair)
-		}
-		bases[key] = reference
-	}
-
-	// Local unless told otherwise, because the moment this exists for has nowhere to publish. A
-	// default pointing at a registry would mean genesis failing at a push to something that is not
-	// there yet, one step away from the thing that could explain it.
-	var publisher builder.Publisher = builder.Local{Run: builder.Command}
-	if *registry != "" {
-		publisher = builder.Registry{Address: *registry, Run: builder.Command}
-	}
-
-	fmt.Fprintf(os.Stderr, "building %s", repository)
-	if *path != "" {
-		fmt.Fprintf(os.Stderr, " at %s", *path)
-	}
-	if *ref != "" {
-		fmt.Fprintf(os.Stderr, " at %s", *ref)
-	}
-	fmt.Fprintln(os.Stderr)
-
-	machine := os.Getenv("MESH_NODE")
-	if machine == "" {
-		machine, _ = os.Hostname()
-	}
-	npmrc, err := packagesFrom(machine)
-	if err != nil {
-		return err
-	}
-	fmt.Fprintf(os.Stderr, "  [packages] %s\n", saysRegistry(npmrc))
-	built, buildErr := builder.Build(ctx, builder.Command, publisher, repository, *path, *ref, where, bases, npmrc,
-		forgeFrom(),
-		func(step, message string) { fmt.Fprintf(os.Stderr, "  [%s] %s\n", step, message) })
-	if buildErr != nil {
-		return buildErr
-	}
-
-	// To standard output, and everything else to standard error, so the caller can read this
-	// without having to separate it from progress.
-	out := onceResult{
-		Module:     built.Manifest.Module,
-		Commit:     built.Commit,
-		Repository: repository,
-		Path:       *path,
-		Ref:        *ref,
-		Manifest:   built.Manifest,
-		Against:    built.Against,
-		Source:     built.Source,
-	}
-	for _, r := range built.Read {
-		out.Read = append(out.Read, readRepository{Repository: r.Repository, Ref: r.Ref})
-	}
-	for _, made := range built.Built {
-		out.Made = append(out.Made, madeArtifact{Name: made.Name, Kind: made.Kind, Reference: made.Reference})
-	}
-	body, err := json.MarshalIndent(out, "", "  ")
-	if err != nil {
-		return err
-	}
-	fmt.Println(string(body))
-	fmt.Fprintf(os.Stderr, "  built %s from %s\n", built.Manifest.Module, short(built.Commit))
-	return nil
-}
-
-// onceResult is what one build reports to whoever started it.
-//
-// The same fields the mesh records for a build, so a reader comparing a genesis build against an
-// ordinary one is comparing the same thing said the same way.
-type onceResult struct {
-	Module     string           `json:"module"`
-	Commit     string           `json:"commit"`
-	Repository string           `json:"repository"`
-	Path       string           `json:"path,omitempty"`
-	Ref        string           `json:"ref,omitempty"`
-	Manifest   any              `json:"manifest"`
-	Made       []madeArtifact   `json:"made"`
-	Against    []string         `json:"against,omitempty"`
-	Read       []readRepository `json:"read,omitempty"`
-	Source     string           `json:"source-fingerprint,omitempty"`
-}
-
-// readRepository is a repository this build read source from besides the module's own.
-type readRepository struct {
-	Repository string `json:"repository"`
-	Ref        string `json:"ref,omitempty"`
-}
-
-type madeArtifact struct {
-	Name      string `json:"name"`
-	Kind      string `json:"kind"`
-	Reference string `json:"reference"`
-}
-
-// parseAround lets flags appear on either side of the repository, because a person writing this by
-// hand will put them wherever reads best and the standard parser stops at the first thing that is
-// not a flag. The same helper the control plane's commands use, for the same reason.
-func parseAround(set *flag.FlagSet, args []string) ([]string, error) {
-	var positionals []string
-	rest := args
-	for {
-		if err := set.Parse(rest); err != nil {
-			return nil, err
-		}
-		rest = set.Args()
-		if len(rest) == 0 {
-			return positionals, nil
-		}
-		positionals = append(positionals, rest[0])
-		rest = rest[1:]
-	}
-}
-
-// multiple is a flag that may be given more than once.
-type repeated []string
-
-func (r *repeated) String() string     { return strings.Join(*r, ", ") }
-func (r *repeated) Set(v string) error { *r = append(*r, v); return nil }
-
-func multiple(set *flag.FlagSet, name, usage string) *[]string {
-	var values repeated
-	set.Var(&values, name, usage)
-	return (*[]string)(&values)
-}

cmd/mesh-builder/packages_test.go

@@ -1,102 +0,0 @@
-package main
-
-import (
-	"os"
-	"path/filepath"
-	"strings"
-	"testing"
-
-	"github.com/novox/mesh-controller/internal/builder"
-)
-
-// The build agent's package registry (novox/hq ADR 0336, issue 121): its npm-package-registry
-// requirement is optional, so the binding may be absent, and on genesis's node the installer seals
-// the forge it raised as one genesis document instead.
-
-// registryFiles names the three paths the build agent's environment always names, writing only those
-// given.
-func registryFiles(t *testing.T, binding, token, genesis string) {
-	t.Helper()
-	dir := t.TempDir()
-	for env, content := range map[string]string{
-		"MESH_PACKAGE_BINDING":          binding,
-		"MESH_NPM_TOKEN_FILE":           token,
-		"MESH_GENESIS_PACKAGE_REGISTRY": genesis,
-	} {
-		path := filepath.Join(dir, env)
-		t.Setenv(env, path)
-		if content != "" {
-			if err := os.WriteFile(path, []byte(content), 0o600); err != nil {
-				t.Fatal(err)
-			}
-		}
-	}
-	for _, env := range []string{"MESH_NPM_REGISTRY", "MESH_NPM_TOKEN", "MESH_NPM_USER", "MESH_NPM_SCOPE"} {
-		t.Setenv(env, "")
-	}
-}
-
-const (
-	aBinding = `{"from":"gitea","at":"anchor.mesh","as":"anchor-agent",
-	  "serves":{"scheme":"http","port":3000,"npm-path":"/api/packages/novox/npm/"}}`
-	aGenesisDocument = `{"scheme":"http","at":"127.0.0.1","port":3100,"npm-path":"/api/packages/novox/npm/",
-	  "as":"mesh-builder","password":"genesis-secret"}`
-)
-
-func TestUntilTheRequirementBindsTheGenesisDocumentIsRead(t *testing.T) {
-	registryFiles(t, "", "", aGenesisDocument)
-	n, err := packagesFrom("anchor")
-	if err != nil {
-		t.Fatalf("an absent binding beside a genesis document was refused: %v", err)
-	}
-	if n.From != builder.FromGenesis || n.Registry != "http://127.0.0.1:3100/api/packages/novox/npm/" ||
-		n.Username != "mesh-builder" || n.Password != "genesis-secret" || n.Scope != "@novox" {
-		t.Fatalf("the genesis document was not what the registry came from: %+v", n)
-	}
-	file, err := n.File()
-	if err != nil || !strings.Contains(file, "//127.0.0.1:3100/api/packages/novox/npm/:username=mesh-builder") {
-		t.Fatalf("the .npmrc is not written from the genesis document: %v\n%s", err, file)
-	}
-	if got := saysRegistry(n); !strings.Contains(got, "genesis document") {
-		t.Errorf("the log does not say the genesis document: %s", got)
-	}
-}
-
-func TestARealBindingWinsOverTheGenesisDocument(t *testing.T) {
-	registryFiles(t, aBinding, "bound-secret\n", aGenesisDocument)
-	n, err := packagesFrom("anchor")
-	if err != nil {
-		t.Fatal(err)
-	}
-	if n.From != builder.FromBinding || n.Registry != "http://anchor.mesh:3000/api/packages/novox/npm/" ||
-		n.Username != "anchor-agent" || n.Password != "bound-secret" {
-		t.Fatalf("the binding did not win over the genesis document: %+v", n)
-	}
-	if got := saysRegistry(n); !strings.Contains(got, "binding") {
-		t.Errorf("the log does not say the binding: %s", got)
-	}
-}
-
-func TestWithNeitherTheAgentHasNoRegistryAndSaysWhere(t *testing.T) {
-	registryFiles(t, "", "", "")
-	n, err := packagesFrom("workstation")
-	if err != nil {
-		t.Fatalf("an unbound optional requirement was a fault: %v", err)
-	}
-	if n.Enabled() || n.Machine != "workstation" {
-		t.Fatalf("a registry came from nowhere: %+v", n)
-	}
-	got := saysRegistry(n)
-	for _, want := range []string{"npm-package-registry", "unbound", "workstation"} {
-		if !strings.Contains(got, want) {
-			t.Errorf("the log does not say %q: %s", want, got)
-		}
-	}
-}
-
-func TestAGenesisDocumentMissingAFieldIsRefusedByName(t *testing.T) {
-	registryFiles(t, "", "", `{"at":"127.0.0.1","port":3000,"npm-path":"/api/packages/novox/npm/","as":"mesh-builder"}`)
-	if _, err := packagesFrom("anchor"); err == nil || !strings.Contains(err.Error(), "password") {
-		t.Fatalf("a genesis document with no password was taken: %v", err)
-	}
-}

cmd/mesh-builder/ready.go

@@ -1,44 +0,0 @@
-package main
-
-import (
-	"errors"
-	"fmt"
-	"os"
-	"path/filepath"
-)
-
-// **The build agent says it is ready** (novox/hq issue 544). It listens on nothing, so no http or tcp
-// check can see it work; it writes a mark once it is bound to its worker and pulls build work, and its
-// container's health check runs `mesh-builder ready`, which passes only while the mark is there. Without
-// it the node-engine could judge the agent only alive, and every walk that moved it waited out the whole
-// grace on each machine.
-//
-// The mark lives in the container's own temporary directory, never in the workspace the machine keeps:
-// a new container starts without it, and a restarted one removes it before it binds again.
-func readyMark() string { return filepath.Join(os.TempDir(), "mesh-builder.ready") }
-
-// notReady removes the mark: a holder starting is not taking work until it says so again.
-func notReady() error {
-	if err := os.Remove(readyMark()); err != nil && !errors.Is(err, os.ErrNotExist) {
-		return fmt.Errorf("cannot remove the mark that this agent takes build work (%s): %w", readyMark(), err)
-	}
-	return nil
-}
-
-// taking writes the mark. A mark that cannot be written is said, and the agent goes on building: its
-// check then says it is not ready, which is the truth the gate should hear.
-func taking(seat string) {
-	if err := os.WriteFile(readyMark(), []byte(seat+"\n"), 0o644); err != nil {
-		fmt.Fprintf(os.Stderr, "cannot mark that this agent takes build work (%s): %v\n", readyMark(), err)
-		return
-	}
-	fmt.Fprintf(os.Stderr, "taking build work from %s\n", seat)
-}
-
-// ready is the health check: nil when this container's agent is bound and pulling build work.
-func ready() error {
-	if _, err := os.Stat(readyMark()); err != nil {
-		return fmt.Errorf("not taking build work yet: %s is not there", readyMark())
-	}
-	return nil
-}

cmd/mesh-builder/ready_test.go

@@ -1,32 +0,0 @@
-package main
-
-import (
-	"os"
-	"testing"
-)
-
-// The health check passes only between the agent saying it takes work and its next start (novox/hq
-// issue 544).
-func TestTheAgentIsReadyOnlyOnceItTakesWork(t *testing.T) {
-	t.Setenv("TMPDIR", t.TempDir())
-	if err := ready(); err == nil {
-		t.Fatal("an agent that never took work is ready")
-	}
-	taking("mesh-build-machine")
-	if err := ready(); err != nil {
-		t.Fatalf("an agent taking work is not ready: %v", err)
-	}
-	// Started again, it is not ready until it binds again.
-	if err := notReady(); err != nil {
-		t.Fatal(err)
-	}
-	if err := ready(); err == nil {
-		t.Fatal("an agent starting again is ready before it takes work")
-	}
-	if err := notReady(); err != nil {
-		t.Fatalf("removing a mark that is not there failed: %v", err)
-	}
-	if _, err := os.Stat(readyMark()); err == nil {
-		t.Fatal("the mark is still there")
-	}
-}

cmd/mesh-builder/seat_test.go

@@ -1,27 +0,0 @@
-package main
-
-import (
-	"encoding/json"
-	"testing"
-
-	"github.com/novox/mesh-controller/internal/link"
-)
-
-// The seat a build machine serves comes from its credential (novox/hq ADR 0190 handover).
-func TestTheCredentialSaysWhichBuildRoleThisMachineServes(t *testing.T) {
-	var held Credential
-	if err := json.Unmarshal([]byte(`{"url":"nats://bus:4222","user":"anchor.builder","password":"x",
-		"claims":[{"seat":"mesh-build-machine","scope":"mesh","serves":[]}]}`), &held); err != nil {
-		t.Fatal(err)
-	}
-	if got := link.BuildSeatClaimed(held.seatsClaimed()); got != "mesh-build-machine" {
-		t.Errorf("the old builder's credential serves %q", got)
-	}
-	var bare Credential
-	if err := json.Unmarshal([]byte(`{"url":"nats://bus:4222","user":"anchor.build-agent","password":"x"}`), &bare); err != nil {
-		t.Fatal(err)
-	}
-	if got := link.BuildSeatClaimed(bare.seatsClaimed()); got != link.TheBuildMachine {
-		t.Errorf("a credential without claims serves %q, want %s", got, link.TheBuildMachine)
-	}
-}

cmd/mesh-builder/stdout_test.go

@@ -1,45 +0,0 @@
-package main
-
-import (
-	"os"
-	"strings"
-	"testing"
-)
-
-// **The genesis path writes its result to stdout and nothing else there.** The installer captures
-// stdout alone and parses it as JSON; one stray log line makes that fail with "invalid character"
-// — exactly what a builder fmt.Printf caused, breaking a build that had worked. This keeps
-// diagnostics on stderr so a future print cannot repeat it silently.
-func TestBuilderDiagnosticsStayOffStdout(t *testing.T) {
-	allowed := map[string]bool{
-		"string(body)": true, // once.go: the result JSON, which IS stdout
-		"version)":     true, // --version
-		`"stopping")`:  true, // the loop.s shutdown line
-		"usage)":       true, // --help text, for a human
-		"said)":        true, // busy: the answer its node-engine reads (novox/hq ADR 0335)
-	}
-	for _, file := range []string{"once.go", "main.go"} {
-		src, err := os.ReadFile(file)
-		if err != nil {
-			t.Fatal(err)
-		}
-		for i, raw := range strings.Split(string(src), "\n") {
-			line := strings.TrimSpace(raw)
-			if !strings.HasPrefix(line, "fmt.Printf(") &&
-				!strings.HasPrefix(line, "fmt.Println(") &&
-				!strings.HasPrefix(line, "fmt.Print(") {
-				continue
-			}
-			ok := false
-			for token := range allowed {
-				if strings.Contains(line, token) {
-					ok = true
-				}
-			}
-			if !ok {
-				t.Errorf("%s:%d writes a diagnostic to stdout, which the installer parses as JSON:\n  %s",
-					file, i+1, line)
-			}
-		}
-	}
-}

cmd/mesh-builder/tried_test.go

@@ -1,31 +0,0 @@
-package main
-
-import (
-	"testing"
-	"time"
-
-	"github.com/novox/mesh-controller/internal/builder"
-)
-
-// A try's outcome, as the build seat says it in the build's log (novox/hq issue 686): the repository's own
-// check's verdict, how long it took, and each line naming what failed.
-func TestATrysOutcomeNamesWhatFailed(t *testing.T) {
-	tried := triedOf(builder.CheckVerdict{Verdict: "pass", Summary: "the change touches no module", Took: 303 * time.Second,
-		Head: "c0ffee", Trunk: "ca3f43c", Gate: &builder.Layer{Verdict: "pass"},
-		Repo: &builder.Layer{Verdict: "fail", Summary: "its merge-check.sh failed: TestX",
-			Failed: "--- FAIL: TestX (0.01s)\n    x_test.go:12: got 1, want 2"}})
-	if tried.Verdict != "fail" || tried.Took != "5m3s" || len(tried.Failed) != 2 || tried.Trunk != "ca3f43c" ||
-		tried.Summary != "its merge-check.sh failed: TestX" {
-		t.Fatalf("a failed try: %+v", tried)
-	}
-	// A head that does not merge fails both layers: the check's own word.
-	conflict := triedOf(builder.CheckVerdict{Verdict: "fail", Summary: "does not merge", Gate: &builder.Layer{Verdict: "fail"},
-		Repo: &builder.Layer{Verdict: "fail", Summary: "does not merge"}})
-	if conflict.Verdict != "fail" || conflict.Summary != "does not merge" {
-		t.Fatalf("a try that does not merge: %+v", conflict)
-	}
-	// No verdict is an error, never a pass.
-	if none := triedOf(builder.CheckVerdict{}); none.Verdict != "error" {
-		t.Fatalf("a try with no verdict: %+v", none)
-	}
-}

cmd/mesh-builder/where_test.go

@@ -1,225 +0,0 @@
-package main
-
-import (
-	"crypto/ed25519"
-	"crypto/rand"
-	"crypto/sha256"
-	"crypto/tls"
-	"crypto/x509"
-	"crypto/x509/pkix"
-	"encoding/hex"
-	"math/big"
-	"net"
-	"os"
-	"path/filepath"
-	"strings"
-	"testing"
-	"time"
-
-	"github.com/novox/mesh-controller/internal/broker"
-)
-
-// Where a builder publishes.
-//
-// Preferably from the mesh: a builder that is a module requires an artifact store, and the mesh
-// writes it a binding saying which machine answers and on what port. Reading it means the address
-// is not a setting somebody keeps in step by hand.
-
-func binding(t *testing.T, body string) string {
-	t.Helper()
-	path := filepath.Join(t.TempDir(), "artifact-store.json")
-	if err := os.WriteFile(path, []byte(body), 0o644); err != nil {
-		t.Fatal(err)
-	}
-	return path
-}
-
-func TestTheMeshSaysWhereToPublish(t *testing.T) {
-	t.Setenv("MESH_BINDING", binding(t, `{"binding":1,"provision":"artifact-store",
-		"from":"anchor","at":"anchor.internal","serves":{"port":5000,"scheme":"http"}}`))
-	where, err := whereToPublish()
-	if err != nil {
-		t.Fatal(err)
-	}
-	if where != "anchor.internal:5000" {
-		t.Fatalf("got %q", where)
-	}
-}
-
-func TestABindingWithNoAddressIsRefused(t *testing.T) {
-	// The provider is not on the private network, so there is no name to reach it by. Falling
-	// back to anything would publish to a store on the wrong machine and be found out much later.
-	t.Setenv("MESH_BINDING", binding(t, `{"binding":1,"from":"anchor","serves":{"port":5000}}`))
-	_, err := whereToPublish()
-	if err == nil {
-		t.Fatal("a binding with nowhere to reach was accepted")
-	}
-	if !strings.Contains(err.Error(), "anchor") {
-		t.Fatalf("the failure does not name the machine: %v", err)
-	}
-}
-
-func TestABindingWithNoPortIsRefused(t *testing.T) {
-	t.Setenv("MESH_BINDING", binding(t, `{"binding":1,"from":"a","at":"a.internal","serves":{}}`))
-	if _, err := whereToPublish(); err == nil {
-		t.Fatal("a binding saying nothing about a port was accepted")
-	}
-}
-
-func TestTheVariableStillWorksForABuilderRunByAPerson(t *testing.T) {
-	// Which is how this started and how it is still run while being developed.
-	t.Setenv("MESH_BINDING", "")
-	t.Setenv("MESH_REGISTRY", "127.0.0.1:5000")
-	where, err := whereToPublish()
-	if err != nil {
-		t.Fatal(err)
-	}
-	if where != "127.0.0.1:5000" {
-		t.Fatalf("got %q", where)
-	}
-}
-
-func TestNeitherIsRefusedRatherThanGuessed(t *testing.T) {
-	t.Setenv("MESH_BINDING", "")
-	t.Setenv("MESH_REGISTRY", "")
-	if _, err := whereToPublish(); err == nil {
-		t.Fatal("a builder with nowhere to publish reported somewhere")
-	}
-}
-
-func TestTheCredentialComesFromAFileTheMeshSealed(t *testing.T) {
-	// A builder that is a module is given its credential the way every module is: sealed to the
-	// machine and written by the host. An environment variable instead would put the one copy
-	// that matters through a terminal and a process listing.
-	path := filepath.Join(t.TempDir(), "broker")
-	if err := os.WriteFile(path, []byte("amqps://a-builder:secret@broker.internal:5671/\n"), 0o600); err != nil {
-		t.Fatal(err)
-	}
-	t.Setenv("MESH_BROKER_FILE", path)
-	t.Setenv("MESH_BROKER_AMQP", "amqp://should-not-be-used@nowhere/")
-
-	got, err := brokerFrom()
-	if err != nil {
-		t.Fatal(err)
-	}
-	if got.URL != "amqps://a-builder:secret@broker.internal:5671/" {
-		t.Fatalf("got %q", got.URL)
-	}
-}
-
-// The credential the mesh seals carries what to check the broker's certificate against, because a
-// mesh's broker presents a certificate of the mesh's own and no public trust store has it. A URL
-// alone can only reach a broker somebody else vouches for.
-func TestTheSealedCredentialCarriesWhatVerifiesTheBroker(t *testing.T) {
-	path := filepath.Join(t.TempDir(), "broker")
-	if err := os.WriteFile(path, []byte(
-		`{"url":"amqps://a-builder:secret@broker.internal:5671/","fingerprint":"abc123"}`),
-		0o600); err != nil {
-		t.Fatal(err)
-	}
-	t.Setenv("MESH_BROKER_FILE", path)
-	t.Setenv("MESH_BROKER_AMQP", "")
-
-	got, err := brokerFrom()
-	if err != nil {
-		t.Fatal(err)
-	}
-	if got.URL != "amqps://a-builder:secret@broker.internal:5671/" {
-		t.Fatalf("the url was lost: %q", got.URL)
-	}
-	if got.Fingerprint != "abc123" {
-		t.Fatal("the builder was given nothing to check the broker against, so it can only " +
-			"connect to a broker some public authority vouches for")
-	}
-}
-
-func TestAnEmptyCredentialFileIsRefused(t *testing.T) {
-	// Otherwise the builder connects as nobody and is refused, with the reason three layers away.
-	path := filepath.Join(t.TempDir(), "broker")
-	if err := os.WriteFile(path, []byte("\n"), 0o600); err != nil {
-		t.Fatal(err)
-	}
-	t.Setenv("MESH_BROKER_FILE", path)
-	t.Setenv("MESH_BROKER_AMQP", "")
-	if _, err := brokerFrom(); err == nil {
-		t.Fatal("an empty credential was accepted")
-	}
-}
-
-func TestABuilderWithNoCredentialAtAllSaysSo(t *testing.T) {
-	t.Setenv("MESH_BROKER_FILE", "")
-	t.Setenv("MESH_BROKER_AMQP", "")
-	if _, err := brokerFrom(); err == nil {
-		t.Fatal("a builder with no broker reported one")
-	}
-}
-
-// The pin is compared in the spelling the mesh writes it.
-//
-// A bare digest against a written fingerprint never matches, and the failure is indistinguishable
-// from being pointed at the wrong broker — which is the one thing this check exists to report
-// truthfully. It cost a lab run.
-func TestThePinIsComparedInTheSpellingTheMeshWritesIt(t *testing.T) {
-	certificate, key := aServerCertificate(t)
-	der := certificate.Certificate[0]
-	sum := sha256.Sum256(der)
-	written := "sha256:" + hex.EncodeToString(sum[:])
-
-	listener, err := tls.Listen("tcp", "127.0.0.1:0", &tls.Config{
-		Certificates: []tls.Certificate{certificate}, MinVersion: tls.VersionTLS12,
-	})
-	if err != nil {
-		t.Fatal(err)
-	}
-	defer listener.Close()
-	go func() {
-		for {
-			conn, err := listener.Accept()
-			if err != nil {
-				return
-			}
-			_ = conn.(*tls.Conn).Handshake()
-			conn.Close()
-		}
-	}()
-	_ = key
-
-	// The pin the mesh wrote must be accepted.
-	if err := handshakeWith(listener.Addr().String(), written); err != nil {
-		t.Fatalf("the broker this builder was told about was refused: %v", err)
-	}
-	// And a different one refused, or the check reports nothing.
-	other := "sha256:" + strings.Repeat("ab", 32)
-	if err := handshakeWith(listener.Addr().String(), other); err == nil {
-		t.Fatal("a broker this builder was not told about was accepted")
-	}
-}
-
-// handshakeWith runs the pin check the builder dials with against an address.
-func handshakeWith(address, pin string) error {
-	conn, err := tls.Dial("tcp", address, broker.PinnedToFingerprint(pin))
-	if err != nil {
-		return err
-	}
-	return conn.Close()
-}
-
-func aServerCertificate(t *testing.T) (tls.Certificate, ed25519.PrivateKey) {
-	t.Helper()
-	public, private, err := ed25519.GenerateKey(rand.Reader)
-	if err != nil {
-		t.Fatal(err)
-	}
-	template := &x509.Certificate{
-		SerialNumber: big.NewInt(1),
-		Subject:      pkix.Name{CommonName: "a broker"},
-		NotBefore:    time.Now().Add(-time.Hour),
-		NotAfter:     time.Now().Add(time.Hour),
-		IPAddresses:  []net.IP{net.ParseIP("127.0.0.1")},
-	}
-	der, err := x509.CreateCertificate(rand.Reader, template, template, public, private)
-	if err != nil {
-		t.Fatal(err)
-	}
-	return tls.Certificate{Certificate: [][]byte{der}, PrivateKey: private}, private
-}

cmd/mesh-controller/addresses_integration_test.go

@@ -221,8 +221,4 @@ func TestOnANodeWithNoNetworkTheStoreIsReachedByLoopback(t *testing.T) {
 	if image != "127.0.0.1:5100/postgres/runtime@"+aDigest {
 		t.Fatalf("on the store's own node, off any network, the image is fetched as %v", image)
 	}
-	held := heldBy(ctx)
-	if got := held["postgres/runtime"]; got != "127.0.0.1:5100/postgres/runtime@"+aDigest {
-		t.Fatalf("a builder beside the store is handed the base %q", got)
-	}
 }

cmd/mesh-controller/addresses_test.go

@@ -1,12 +1,9 @@
 package main
 
 import (
-	"encoding/json"
 	"strings"
-	"testing"
 
 	"git.novox.be/novox/mesh-sdk/go/catalogue"
-	"github.com/novox/mesh-controller/internal/link"
 )
 
 // An address is read from the node's settings where it is used, never recorded with a port
@@ -14,62 +11,6 @@ import (
 
 var aDigest = "sha256:" + strings.Repeat("e", 64)
 
-// **A build is recorded by digest and path**, whatever address the builder pushed to — what it
-// made and what it stood on both; an image the module runs from elsewhere is left where it says.
-func TestABuildIsRecordedWithoutTheStoresAddress(t *testing.T) {
-	manifest, _ := json.Marshal(map[string]any{
-		"module": "gitea", "version": "1",
-		"resources": []map[string]any{
-			{"id": "server", "type": "container", "name": "mesh-gitea",
-				"image": "anchor.internal:5100/gitea/server@" + aDigest},
-			{"id": "config", "type": "archive", "path": "/etc/gitea", "digest": aDigest,
-				"source": "http://anchor.internal:5100/v2/gitea/config/blobs/" + aDigest},
-			{"id": "cache", "type": "container", "name": "mesh-gitea-cache",
-				"image": "valkey/valkey@" + aDigest},
-		},
-	})
-	kept := buildFrom(link.BuildResult{
-		ID: "b1", Repository: "https://forge.example/gitea.git", Commit: "abc", On: "laptop",
-		Manifest: manifest,
-		Made: []link.MadeArtifact{
-			{Name: "server", Kind: "image", Reference: "anchor.internal:5100/gitea/server@" + aDigest},
-			{Name: "config", Kind: "archive", Reference: "http://anchor.internal:5100/v2/gitea/config/blobs/" + aDigest},
-		},
-		Against: []string{"anchor.internal:5100/mesh-tools/runtime@" + aDigest},
-	})
-	if kept.Module != "gitea" {
-		t.Fatalf("the module was not read from the recorded manifest: %q", kept.Module)
-	}
-	if kept.Made[0].Reference != catalogue.ArtifactStoreScheme+"gitea/server@"+aDigest {
-		t.Errorf("the image is recorded as %q, address and all", kept.Made[0].Reference)
-	}
-	if kept.Made[1].Reference != catalogue.ArtifactStoreScheme+"gitea/config/blobs/"+aDigest {
-		t.Errorf("the archive is recorded as %q, address and all", kept.Made[1].Reference)
-	}
-	recorded, err := catalogue.ParseManifest(kept.Manifest)
-	if err != nil {
-		t.Fatal(err)
-	}
-	if got := recorded.Resources[0]["image"]; got != catalogue.ArtifactStoreScheme+"gitea/server@"+aDigest {
-		t.Errorf("the recorded manifest's image is %v", got)
-	}
-	if got := recorded.Resources[1]["source"]; got != catalogue.ArtifactStoreScheme+"gitea/config/blobs/"+aDigest {
-		t.Errorf("the recorded manifest's archive is %v", got)
-	}
-	if got := recorded.Resources[2]["image"]; got != "valkey/valkey@"+aDigest {
-		t.Errorf("an image the build did not make was rewritten: %v", got)
-	}
-	if strings.Contains(string(kept.Manifest), "anchor.internal:5100") {
-		t.Errorf("the recorded manifest still carries the store's address:\n%s", kept.Manifest)
-	}
-	// What the build stood on is an edge to another module's artifact, and it is recorded the way
-	// that artifact is: by path in the store, so the edge still names the same thing when the
-	// store answers at another address.
-	if kept.Against[0] != catalogue.ArtifactStoreScheme+"mesh-tools/runtime@"+aDigest {
-		t.Errorf("what the build stood on was recorded by address: %v", kept.Against)
-	}
-}
-
 // aStore is a module offering the artifact store on 5000, published the long way as the
 // distribution module does, so a node may be given another number for it.
 func aStore() catalogue.Manifest {

cmd/mesh-controller/ask_bus_look_integration_test.go

@@ -1,134 +0,0 @@
-//go:build integration
-
-package main
-
-import (
-	"context"
-	"fmt"
-	"strings"
-	"testing"
-	"time"
-
-	"git.novox.be/novox/mesh-sdk/go/catalogue"
-	"github.com/novox/mesh-controller/internal/inventory"
-)
-
-// Issue 1334, the look: when the bus did not answer an ask of any module of a tier, no build is in flight and no event follows,
-// so the look itself comes back (it fails, and the looker retries it), asks the modules again, and past the bound fails the plan.
-func TestALookComesBackForATierTheBusRefusedWhole(t *testing.T) {
-	open := aMesh(t)
-	ctx := t.Context()
-	inv := open.inventory
-	for _, name := range []string{"a", "b"} {
-		if err := inv.RegisterModule(ctx, catalogue.Manifest{Module: name, Version: "1"},
-			inventory.Source{Repository: "novox/" + name, Seat: "git", Ref: "main", BuiltFrom: "c0", Head: "c0"}); err != nil {
-			t.Fatal(err)
-		}
-	}
-	p := inventory.Plan{ID: "plan-bus", Repository: "novox/a", Branch: "main", Commit: "c1", Created: time.Now().UTC(),
-		State: inventory.PlanBuilding, Tiers: [][]string{{"a", "b"}}, Modules: map[string]*inventory.PlanModule{"a": {}, "b": {}}}
-	if err := inv.SavePlan(ctx, &p); err != nil {
-		t.Fatal(err)
-	}
-	bus := false
-	was := askABuild
-	askABuild = func(_ context.Context, source buildSource, _, _ string) (string, error) {
-		if !bus {
-			return "", fmt.Errorf("%w: nats: no responders available for request", inventory.ErrNoChain)
-		}
-		return "build-" + source.Repository, nil
-	}
-	t.Cleanup(func() { askABuild = was })
-	look := func() bool {
-		t.Helper()
-		release, err := inv.HoldPlans(ctx, true)
-		if err != nil {
-			t.Fatal(err)
-		}
-		defer release()
-		return advanceHeld(ctx, open)
-	}
-	read := func() inventory.Plan {
-		t.Helper()
-		got, err := inv.PlanByID(ctx, "plan-bus")
-		if err != nil {
-			t.Fatal(err)
-		}
-		return got
-	}
-
-	// Every module refused: the look says it failed, which has the looker come back; the plan is building and says why.
-	if !look() {
-		t.Fatal("a look that left the whole tier unasked for the bus did not fail, so nothing would come back to it")
-	}
-	if got := read(); got.State != inventory.PlanBuilding || !strings.Contains(got.Note, "bus did not answer") ||
-		got.Modules["a"].State != "" || got.Modules["b"].State != "" {
-		t.Fatalf("the plan after a refused tier: %s %q %+v %+v", got.State, got.Note, got.Modules["a"], got.Modules["b"])
-	}
-	// Again, still refused: the same fact is not saved again, and the look still comes back.
-	before := read().Revision
-	if !look() || read().Revision != before {
-		t.Fatalf("a second refused look failed to come back or saved the plan again (revision %d, was %d)", read().Revision, before)
-	}
-
-	// The bus answers at the next look: both are asked, and nothing waits any more.
-	bus = true
-	if look() {
-		t.Fatal("a look that asked the whole tier failed")
-	}
-	if got := read(); got.Modules["a"].State != "asked" || got.Modules["b"].State != "asked" || got.Modules["a"].BusWaitFrom != nil {
-		t.Fatalf("the tier was not asked once the bus answered: %+v %+v", got.Modules["a"], got.Modules["b"])
-	}
-}
-
-func TestALookFailsTheTierTheBusRefusedPastTheBound(t *testing.T) {
-	open := aMesh(t)
-	ctx := t.Context()
-	inv := open.inventory
-	if err := inv.RegisterModule(ctx, catalogue.Manifest{Module: "a", Version: "1"},
-		inventory.Source{Repository: "novox/a", Seat: "git", Ref: "main", BuiltFrom: "c0", Head: "c0"}); err != nil {
-		t.Fatal(err)
-	}
-	long := time.Now().UTC().Add(-busWaitBound - time.Minute)
-	p := inventory.Plan{ID: "plan-bus", Repository: "novox/a", Branch: "main", Commit: "c1", Created: time.Now().UTC(),
-		State: inventory.PlanBuilding, Tiers: [][]string{{"a"}}, Modules: map[string]*inventory.PlanModule{"a": {BusWaitFrom: &long}}}
-	if err := inv.SavePlan(ctx, &p); err != nil {
-		t.Fatal(err)
-	}
-	was := askABuild
-	askABuild = func(context.Context, buildSource, string, string) (string, error) {
-		return "", fmt.Errorf("%w: nats: no responders available for request", inventory.ErrNoChain)
-	}
-	t.Cleanup(func() { askABuild = was })
-	release, err := inv.HoldPlans(ctx, true)
-	if err != nil {
-		t.Fatal(err)
-	}
-	advanceHeld(ctx, open)
-	release()
-	got, err := inv.PlanByID(ctx, "plan-bus")
-	if err != nil {
-		t.Fatal(err)
-	}
-	if got.State != inventory.PlanFailed || !strings.Contains(got.Note, "the bus did not answer an ask for 10m0s (since ") {
-		t.Fatalf("a bus silent past its bound did not fail the plan in words: %s %q", got.State, got.Note)
-	}
-
-	// Rebuilt by hand while the bus still reloads: said as waiting, not as a failure and not with an empty reason.
-	joined, said, err := joinAPlan(ctx, open, "a")
-	if err != nil || !joined || !strings.Contains(said, "not asked yet: the bus did not answer") {
-		t.Fatalf("a rebuild left for the bus is said as %v %q %v", joined, said, err)
-	}
-	// And retried by hand: the module is named as waiting, not as asked again.
-	got, _ = inv.PlanByID(ctx, "plan-bus")
-	if got.State == inventory.PlanFailed {
-		got.Modules["a"].State, got.Modules["a"].Why = "failed", "x"
-		if err := inv.SavePlan(ctx, &got); err != nil {
-			t.Fatal(err)
-		}
-		said, err := retryPlan(ctx, open, "plan-bus")
-		if err != nil || !strings.Contains(said, "not asked yet: the bus did not answer") {
-			t.Fatalf("a retry left for the bus is said as %q %v", said, err)
-		}
-	}
-}

cmd/mesh-controller/ask_bus_moment_test.go

@@ -1,139 +0,0 @@
-package main
-
-import (
-	"context"
-	"errors"
-	"fmt"
-	"strings"
-	"testing"
-	"time"
-
-	"github.com/novox/mesh-controller/internal/inventory"
-)
-
-// Issue 1334: a bus that does not answer for a moment (it reloads its user list, and JetStream's API has no responder for a few
-// seconds) is not a failed build. The module is left unasked and the plan building, and the next look asks it again; only a
-// module's own fault, or a bus silent for ten minutes, fails the plan.
-
-func aTierOfThree() (*inventory.Plan, map[string]inventory.Entry) {
-	p := &inventory.Plan{ID: "plan-1", State: inventory.PlanBuilding, Tiers: [][]string{{"a", "b", "c"}},
-		Modules: map[string]*inventory.PlanModule{}}
-	byName := map[string]inventory.Entry{}
-	for _, m := range []string{"a", "b", "c"} {
-		byName[m] = inventory.Entry{Source: inventory.Source{Repository: "novox/" + m, Seat: "git", Ref: "main"}}
-	}
-	return p, byName
-}
-
-func TestABusThatDoesNotAnswerForAMomentDoesNotFailTheTier(t *testing.T) {
-	p, byName := aTierOfThree()
-	bus := false
-	was := askABuild
-	askABuild = func(_ context.Context, source buildSource, _, _ string) (string, error) {
-		if source.Repository == "novox/b" && !bus {
-			return "", fmt.Errorf("%w: the bucket mesh-controller_builds is not on the bus: nats: no responders available for request",
-				inventory.ErrNoChain)
-		}
-		return "build-" + source.Repository, nil
-	}
-	t.Cleanup(func() { askABuild = was })
-
-	for _, m := range []string{"a", "b", "c"} {
-		askModule(t.Context(), p, m, byName)
-	}
-	if p.State != inventory.PlanBuilding {
-		t.Fatalf("a bus that did not answer for a moment failed the plan: %s, %q", p.State, p.Note)
-	}
-	if p.Modules["a"].State != "asked" || p.Modules["c"].State != "asked" {
-		t.Fatalf("the modules the bus did answer for were not asked: %+v %+v", p.Modules["a"], p.Modules["c"])
-	}
-	if s := p.Modules["b"]; s.State != "" {
-		t.Fatalf("the module the bus did not answer for is %q, not left unasked", s.State)
-	}
-	if got := unaskedOf(*p); len(got) != 1 || got[0] != "b" {
-		t.Fatalf("the next look would ask %v, not b", got)
-	}
-	if !strings.Contains(p.Note, "bus did not answer") {
-		t.Fatalf("the plan says nothing of the wait: %q", p.Note)
-	}
-
-	// The next look, the bus answering: b is asked and the plan goes on.
-	bus = true
-	for _, m := range unaskedOf(*p) {
-		askModule(t.Context(), p, m, byName)
-	}
-	if p.State != inventory.PlanBuilding || p.Modules["b"].State != "asked" || p.Modules["b"].Build == "" {
-		t.Fatalf("b was not asked once the bus answered: %s %+v", p.State, p.Modules["b"])
-	}
-}
-
-func TestABusSilentForTenMinutesFailsTheTierAsBefore(t *testing.T) {
-	p, byName := aTierOfThree()
-	was := askABuild
-	askABuild = func(context.Context, buildSource, string, string) (string, error) {
-		return "", fmt.Errorf("%w: nats: no responders available for request", inventory.ErrNoChain)
-	}
-	t.Cleanup(func() { askABuild = was })
-	askModule(t.Context(), p, "a", byName)
-	if p.State != inventory.PlanBuilding {
-		t.Fatalf("the first refusal failed the plan: %q", p.Note)
-	}
-	long := time.Now().Add(-busWaitBound - time.Minute)
-	p.Modules["a"].BusWaitFrom = &long
-	askModule(t.Context(), p, "a", byName)
-	if p.State != inventory.PlanFailed || p.Modules["a"].State != "failed" {
-		t.Fatalf("a bus silent past its bound did not fail the plan: %s %+v", p.State, p.Modules["a"])
-	}
-	// Said in plain words: the bus, the wait, and since when.
-	want := "a could not be asked for: the bus did not answer an ask for 10m0s (since " + long.UTC().Format(time.RFC3339) +
-		"): this kind of record lives on the bus"
-	if !strings.HasPrefix(p.Note, want) || p.Modules["a"].Why != strings.TrimPrefix(want, "a could not be asked for: ")+p.Note[len(want):] {
-		t.Fatalf("the plan says %q, not words starting %q", p.Note, want)
-	}
-	// The wait has ended: a Retry made while the bus still reloads waits again, and does not fail at its first refusal.
-	if p.Modules["a"].BusWaitFrom != nil {
-		t.Fatalf("a failed module still holds the start of its wait: %v", p.Modules["a"].BusWaitFrom)
-	}
-	p.State = inventory.PlanBuilding
-	askModule(t.Context(), p, "a", byName)
-	if p.State != inventory.PlanBuilding || p.Modules["a"].State != "" || p.Modules["a"].BusWaitFrom == nil {
-		t.Fatalf("a retry made while the bus is silent did not wait afresh: %s %+v", p.State, p.Modules["a"])
-	}
-}
-
-func TestAPlanWithAModuleWaitingForTheBusIsOneTheLookComesBackTo(t *testing.T) {
-	p, _ := aTierOfThree()
-	if busWaiting(*p) {
-		t.Fatal("a plan whose modules are not asked yet waits for the bus")
-	}
-	now := time.Now()
-	p.Modules["b"] = &inventory.PlanModule{BusWaitFrom: &now}
-	p.Modules["a"] = &inventory.PlanModule{State: "asked"}
-	if got := busWaitingIn(*p); len(got) != 1 || got[0] != "b" {
-		t.Fatalf("the modules waiting for the bus are %v, not b", got)
-	}
-	p.State = inventory.PlanFailed
-	if busWaiting(*p) {
-		t.Fatal("a plan that is not open is waited for")
-	}
-}
-
-func TestAModulesOwnFaultStillFailsThePlan(t *testing.T) {
-	p, byName := aTierOfThree()
-	delete(byName, "a")
-	askModule(t.Context(), p, "a", byName)
-	if p.State != inventory.PlanFailed || !strings.Contains(p.Note, "no longer in the catalogue") {
-		t.Fatalf("a module gone from the catalogue did not fail the plan: %s %q", p.State, p.Note)
-	}
-
-	p, byName = aTierOfThree()
-	was := askABuild
-	askABuild = func(context.Context, buildSource, string, string) (string, error) {
-		return "", errors.New("git.example/novox/a is no repository the catalogue builds a module from")
-	}
-	t.Cleanup(func() { askABuild = was })
-	askModule(t.Context(), p, "a", byName)
-	if p.State != inventory.PlanFailed || p.Modules["a"].State != "failed" {
-		t.Fatalf("a module's own refusal did not fail the plan: %s %+v", p.State, p.Modules["a"])
-	}
-}

cmd/mesh-controller/ask_bus_wait.go

@@ -1,16 +1,12 @@
 package main
 
 import (
-	"errors"
 	"fmt"
 	"slices"
 	"sort"
 	"strings"
 	"time"
 
-	"github.com/nats-io/nats.go"
-	"github.com/nats-io/nats.go/jetstream"
-
 	"github.com/novox/mesh-controller/internal/inventory"
 )
 
@@ -18,37 +14,6 @@ import (
 // (issue 1334).
 const busWaitBound = 10 * time.Minute
 
-// busDidNotAnswer says an ask failed because the bus's JetStream had no responder at that moment, as it has for a few seconds
-// when the bus reloads its user list (novox/hq issue 353), and not because of the module: the same ask is made again.
-func busDidNotAnswer(err error) bool {
-	if err == nil {
-		return false
-	}
-	if errors.Is(err, nats.ErrNoResponders) || errors.Is(err, nats.ErrJetStreamNotEnabled) ||
-		errors.Is(err, jetstream.ErrJetStreamNotEnabled) || errors.Is(err, inventory.ErrNoChain) {
-		return true
-	}
-	// An error that crossed a boundary as text only.
-	text := err.Error()
-	return strings.Contains(text, "no responders available") || strings.Contains(text, "jetstream not enabled")
-}
-
-// waitForTheBus leaves a module whose ask the bus did not answer unasked, the plan building, and says so in the plan's note: the
-// next look asks the tier's unasked modules again. It says false, so the caller fails the plan as for any refusal, once the bus
-// has been silent for busWaitBound.
-func waitForTheBus(p *inventory.Plan, state *inventory.PlanModule, name string, err error, now time.Time) bool {
-	if state.BusWaitFrom == nil {
-		state.BusWaitFrom = &now
-	}
-	if now.Sub(*state.BusWaitFrom) > busWaitBound {
-		return false
-	}
-	state.State, state.Why = "", ""
-	p.Note = fmt.Sprintf("tier %d: %s not asked: the bus did not answer (%v); asked again at the next look, failing after %s",
-		p.Tier, name, firstLine(err.Error()), busWaitBound)
-	return true
-}
-
 // busWaiting says an open plan has a module of its current tier that the bus did not answer an ask of: the look must come back
 // for it, as nothing else will when no build of the tier is in flight (issue 1334).
 func busWaiting(p inventory.Plan) bool {

cmd/mesh-controller/ask_bus_wait_test.go

@@ -0,0 +1,23 @@
+package main
+
+import (
+	"strings"
+	"testing"
+	"time"
+
+	"github.com/novox/mesh-controller/internal/inventory"
+)
+
+// A retry of a plan failed past the bus's bound, whose module the bus still does not answer, names that module as waiting:
+// read while the plan still says failed, it was named nowhere, and the retry said "asked" with nothing after it (issue
+// 1403, met again once the hand rebuild no longer resumed the plan first).
+func TestARetryNamesTheModulesStillWaitingForTheBus(t *testing.T) {
+	since := time.Now().UTC()
+	p := inventory.Plan{ID: "plan-bus", State: inventory.PlanFailed, Tiers: [][]string{{"a"}},
+		Modules: map[string]*inventory.PlanModule{"a": {BusWaitFrom: &since}}}
+	waiting := busWaitingOnRetry(p)
+	_, said := retryWords(p, []string{"a"}, nil, waiting)
+	if !strings.Contains(said, "a not asked yet: the bus did not answer") || strings.Contains(said, "asked ;") {
+		t.Fatalf("a retry left for the bus is said as %q", said)
+	}
+}

cmd/mesh-controller/asker.go

@@ -645,6 +645,10 @@ func doesWords(act conditions.Action) string {
 		return "the delivery is stopped"
 	case act.Verb == broker.ControllerSeat+".plans" && act.Arguments["retry"] != "":
 		return "the failed builds are asked again"
+	case act.Verb == broker.ControllerSeat+".push" && act.Arguments["node"] != "":
+		return "the held builds are sent to " + act.Arguments["node"]
+	case act.Verb == broker.ControllerSeat+".upgrade" && act.Arguments["release-backlog"] != "":
+		return "the builds held after the failed delivery are released"
 	case strings.HasSuffix(act.Verb, ".restart"):
 		return "its service is restarted on " + act.Machine
 	}

cmd/mesh-controller/asker_retry_integration_test.go

@@ -33,7 +33,7 @@ func TestAWarrantForRetryRetriesAFailedPlanInTheStoreAndEndsItsCondition(t *test
 		Note:     "a failed to build in tier 0",
 		Delivery: &inventory.PlanDelivery{},
 		Modules: map[string]*inventory.PlanModule{"a": {State: "failed", AskedAt: &before, Build: "build-1",
-			Why: link.KilledByHand}},
+			Why: "killed by hand"}},
 		Times: &inventory.PlanTimes{Cut: &before, Started: &before, Ended: &ended, Class: inventory.ClassLeaf}}
 	if err := open.inventory.SavePlan(ctx, &failed); err != nil {
 		t.Fatal(err)

cmd/mesh-controller/away_integration_test.go

@@ -66,17 +66,8 @@ func TestAPlanGoesOnWithoutAMachineAwayWhenItsTierIsSent(t *testing.T) {
 
 	// The build machine and the machines, as far as the plan meets them: an ask is counted, a send is recorded and kept.
 	var mu sync.Mutex
-	var asks []string
 	var sends [][]string
-	wasAsk := askABuild
-	askABuild = func(_ context.Context, source buildSource, _, _ string) (string, error) {
-		mu.Lock()
-		defer mu.Unlock()
-		id := link.NewBuildID(time.Now().Add(time.Duration(len(asks)) * time.Millisecond))
-		asks = append(asks, source.Repository+"#"+id)
-		return id, nil
-	}
-	t.Cleanup(func() { askABuild = wasAsk })
+	everyKeyDone(t) // the builds of the tiers: each module is taken from a done key as soon as the walk reaches it
 	digests := 0
 	wasSend := sendRollout
 	sendRollout = func(ctx context.Context, open *stores, names []string) ([]string, error) {
@@ -198,13 +189,7 @@ func TestAPlanGoesOnWithoutAMachineAwayWhenItsTierIsSent(t *testing.T) {
 	if !strings.Contains(moved, "laptop was away: sent when it is heard again") || strings.Contains(moved, "anchor") {
 		t.Errorf("1161/AC2: the plan says %q; want laptop named away and not anchor", moved)
 	}
-	// The ask for tier 1's build is the next step, and records its build id on the module.
-	eventually(t, "tier 1 asked", func() bool { m := plan().Modules["b"]; return m != nil && m.Build != "" })
-	b := plan().Modules["b"]
-	askedAt, _ := link.BuildAskedAt(b.Build)
-	record(b.Build, "b", "c2", askedAt)
-	register("b", "c2", askedAt)
-	planBuilt(ctx, open, "b", "c2", "", askedAt, b.Build)
+	// Tier 1's module is taken from its key, which the walk's look does by itself.
 	eventually(t, "tier 1 sent to anchor alone", func() bool {
 		mu.Lock()
 		defer mu.Unlock()

cmd/mesh-controller/batches.go

@@ -232,8 +232,8 @@ func (f following) hearMerge(ctx context.Context, m link.SourceMoved, now time.T
 		fmt.Print(nothingReadsIt(repository, m))
 		return nil
 	}
-	// **A module the merge adds is asked for now** (novox/hq issue 1617), not when the batch is cut.
-	askNewModulesAtHearing(ctx, inv, m, entries, read, facts.from)
+	// A module the merge adds is registered from the builder's first done key of it, which the builder's write wakes
+	// (novox/hq ADR 0501 §6): nothing is asked here.
 	// **Its delivery group's word, before the plans are held** (ADR 0306 decision 2): a slow answer holds up no walk.
 	own := ownPath(touches)
 	waits, holding, err := groupWaitHolding(ctx, inv, m, deliverySeatHeld(entries))
@@ -800,6 +800,9 @@ type keptMerge struct {
 	// FirstBuild says the merge is a first merge into a repository the mesh builds nothing from, kept to ask the first
 	// build of its modules once mesh-delivery's word on it is kept (novox/hq ADR 0432, issue 1146).
 	FirstBuild bool `json:"first_build,omitempty"`
+	// Held says which first builds of the merge were refused for a word the running build-agent does not read: the merge
+	// waits for a build-agent that reads them, and is never failed (novox/hq ADR 0482 §5, issue 1173).
+	Held []heldFirstBuild `json:"held,omitempty"`
 }
 
 // announcedOf is a kept merge as the forge announced it, and what it moved; empty where the record says none.

cmd/mesh-controller/batches_test.go

@@ -264,7 +264,7 @@ func TestAPlanLineNamesWhatItMoves(t *testing.T) {
 		}
 		return nil
 	}
-	if got, want := planLineOn(p, now, pauseView{}, tierAtLeast, running),
+	if got, want := planLineOn(p, now, tierAtLeast, running),
 		"mesh-catalog #175 a tap shows its outcome · messenger, telegram → novox · tier 1 of 1, building for 2m0s"; got != want {
 		t.Fatalf("the line reads %q, want %q", got, want)
 	}

cmd/mesh-controller/build_seat_test.go

@@ -1,43 +0,0 @@
-package main
-
-import (
-	"testing"
-
-	"git.novox.be/novox/mesh-sdk/go/catalogue"
-	"github.com/novox/mesh-controller/internal/inventory"
-	"github.com/novox/mesh-controller/internal/link"
-)
-
-func claiming(module, seat string, on ...string) inventory.Entry {
-	return inventory.Entry{
-		Manifest: catalogue.Manifest{Module: module, Claims: []catalogue.Claim{{Name: seat}}},
-		On:       on,
-	}
-}
-
-// The controller asks the build role that has a holder (novox/hq ADR 0190 handover): the retired
-// one while only the builder is assigned, the current one from the first build-agent on, and the
-// current one when nothing holds either — where every ask goes once the handover is done.
-func TestTheControllerAsksTheBuildRoleThatHasAHolder(t *testing.T) {
-	onlyTheBuilder := []inventory.Entry{
-		claiming("builder", link.TheBuildMachineBefore, "anchor"),
-		claiming("build-agent", link.TheBuildMachine), // registered, assigned nowhere yet
-	}
-	if got := buildSeatAmong(onlyTheBuilder); got != link.TheBuildMachineBefore {
-		t.Errorf("with only the builder assigned, asked %q", got)
-	}
-	bothHeld := []inventory.Entry{
-		claiming("builder", link.TheBuildMachineBefore, "anchor"),
-		claiming("build-agent", link.TheBuildMachine, "home-server"),
-	}
-	if got := buildSeatAmong(bothHeld); got != link.TheBuildMachine {
-		t.Errorf("with a build-agent assigned anywhere, asked %q", got)
-	}
-	neither := []inventory.Entry{claiming("builder", link.TheBuildMachineBefore)}
-	if got := buildSeatAmong(neither); got != link.TheBuildMachine {
-		t.Errorf("with no holder of either, asked %q, want the current role", got)
-	}
-	if got := buildSeatAmong(nil); got != link.TheBuildMachine {
-		t.Errorf("an empty catalogue asks %q", got)
-	}
-}

cmd/mesh-controller/build_source.go

@@ -7,6 +7,7 @@ import (
 	"fmt"
 	"os"
 	"regexp"
+	"slices"
 	"strings"
 	"time"
 
@@ -188,25 +189,13 @@ func (f *sourceForms) same(aRepository, aSeat, bRepository, bSeat string) bool {
 	return f.canonical(aRepository, aSeat) == f.canonical(bRepository, bSeat)
 }
 
-// buildsFrom says the catalogue builds some module from this repository.
-func (f *sourceForms) buildsFrom(entries []inventory.Entry, repository, seat string) bool {
-	for _, e := range entries {
-		if e.Provided || e.Source.Repository == "" {
-			continue
-		}
-		if f.same(e.Source.Repository, e.Source.Seat, repository, seat) {
-			return true
-		}
-	}
-	return false
-}
-
 // forgeFacts is what the mesh's forge says of a repository a module is registered from (novox/hq ADR 0266).
 type forgeFacts struct {
 	// ID is the forge's own id of the repository: what tells it from one deleted and made again by its name.
 	ID int64
-	// Guarded is whether the branch is protected as a module's trunk must be: no direct push, at least one
-	// required status, and no administrator merging past one. Why says what is missing when it is not.
+	// Guarded is whether the branch is protected as a module's trunk must be: no direct push, a merge whitelist naming
+	// the tools' account and no agent's account, and no administrator merging past the rule (novox/hq ADR 0534 §6; no
+	// required status, which the forge no longer asks, §1). Why says what is missing when it is not.
 	Guarded bool
 	Why     string
 }
@@ -361,46 +350,68 @@ func askTheForgeOnce(ctx context.Context, owner, repo, branch string) (forgeFact
 	return facts, nil
 }
 
+// forgeToolsAccount is the forge tools' account, which main's merge whitelist names for mesh-delivery (novox/hq ADR 0398
+// §2, the gitea module's tools-account.ts TOOLS_ACCOUNT); beside it the whitelist names only people's own logins, the
+// operator's (ADR 0534 §2), never an agent's account.
+const forgeToolsAccount = "mesh-tools"
+
+// isAgentAccount is whether a forge login is a node's agent's account, agent-<node> (novox/hq ADR 0398 §1): one that
+// may never merge into a module's trunk by itself.
+func isAgentAccount(login string) bool { return strings.HasPrefix(login, "agent-") }
+
 // protectionRule is a branch protection rule as the forge's tool summarises it.
 type protectionRule struct {
 	Rule             string   `json:"rule"`
 	Push             bool     `json:"push"`
 	RequiredStatuses []string `json:"required_statuses"`
 	AdminMayOverride bool     `json:"admin_may_override"`
+	// MergeWhitelist is who may merge into the branch; nil when the rule keeps no merge whitelist (anyone who writes).
+	MergeWhitelist []string `json:"merge_whitelist"`
 }
 
 // judgedRule judges the one rule the forge applies to a branch, as the forge picks it: the rule named for the
 // branch, else the first glob rule, in the forge's order, that covers it (gitea's first matching rule). Never a
-// later rule that happens to be stronger: the forge does not read it.
+// later rule that happens to be stronger: the forge does not read it. A trunk is trusted for who can land a commit on
+// it, not for a status it requires (novox/hq ADR 0534 §6): no push, a merge whitelist naming the tools' account and
+// beside it only people's own logins, never an agent's, and no administrator merging past the rule; then a commit lands
+// there through mesh-delivery, on a passing mesh/check and the operator's Approve (ADR 0534 §4), or by the operator's
+// own hand at the forge (§2).
 func judgedRule(rules []protectionRule, branch string) forgeFacts {
-	var applied *protectionRule
-	for i := range rules {
-		if rules[i].Rule == branch {
-			applied = &rules[i]
-			break
-		}
-	}
-	if applied == nil {
-		for i := range rules {
-			if ruleCovers(rules[i].Rule, branch) {
-				applied = &rules[i]
-				break
-			}
-		}
-	}
-	switch r := applied; {
+	switch r := appliedRule(rules, branch); {
 	case r == nil:
 		return forgeFacts{Why: fmt.Sprintf("no protection rule covers %s", branch)}
 	case r.Push:
 		return forgeFacts{Why: fmt.Sprintf("the rule %s lets a person push to %s directly", r.Rule, branch)}
-	case len(r.RequiredStatuses) == 0:
-		return forgeFacts{Why: fmt.Sprintf("the rule %s requires no status before a merge into %s", r.Rule, branch)}
+	case r.MergeWhitelist == nil || len(r.MergeWhitelist) == 0:
+		return forgeFacts{Why: fmt.Sprintf("the rule %s keeps no merge whitelist naming %s alone for %s", r.Rule, forgeToolsAccount, branch)}
+	case !slices.Contains(r.MergeWhitelist, forgeToolsAccount):
+		return forgeFacts{Why: fmt.Sprintf("the rule %s lets %s merge into %s, and not %s", r.Rule,
+			strings.Join(r.MergeWhitelist, ", "), branch, forgeToolsAccount)}
+	case slices.ContainsFunc(r.MergeWhitelist, isAgentAccount):
+		return forgeFacts{Why: fmt.Sprintf("the rule %s lets an agent's account merge into %s: %s", r.Rule, branch,
+			strings.Join(r.MergeWhitelist, ", "))}
 	case r.AdminMayOverride:
-		return forgeFacts{Why: fmt.Sprintf("the rule %s lets an administrator merge into %s past a status", r.Rule, branch)}
+		return forgeFacts{Why: fmt.Sprintf("the rule %s lets an administrator merge into %s past it", r.Rule, branch)}
 	}
 	return forgeFacts{Guarded: true}
 }
 
+// appliedRule is the one rule the forge applies to a branch: the rule named for it, else the first glob rule, in the
+// forge's order, that covers it; nil when none does.
+func appliedRule(rules []protectionRule, branch string) *protectionRule {
+	for i := range rules {
+		if rules[i].Rule == branch {
+			return &rules[i]
+		}
+	}
+	for i := range rules {
+		if ruleCovers(rules[i].Rule, branch) {
+			return &rules[i]
+		}
+	}
+	return nil
+}
+
 // ruleCovers says a protection rule's name — a branch, or a glob of them — covers a branch, as the forge reads it.
 func ruleCovers(rule, branch string) bool {
 	if rule == branch {
@@ -463,14 +474,42 @@ func (f *sourceForms) onTheForge(repository, seat string) (owner, name string, o
 //   - from the module's registered repository — the same repository by the forge's own id, not only its name; or,
 //     for a module new to the catalogue, from a repository the catalogue builds another module from;
 //   - and from a repository on the mesh's forge whose trunk is protected as a trunk must be: no direct push, at
-//     least one required status, no administrator merging past one.
+//     a merge whitelist naming the tools' account and no agent's, no administrator merging past the rule (ADR 0534 §6).
 //
 // Anything else only when the build request was kept as asked at the controller's terminal, for this very
 // repository and path; or, for the build of a merge, when mesh-delivery announced it on the operator's Approve of
 // that head (novox/hq ADR 0420 §7 for a moved module, ADR 0432 for a new one), the forge's checks still holding. path is the module's directory as built; branch the trunk it is registered from.
 func mayRegisterFrom(ctx context.Context, inv *inventory.Inventory, module string, built inventory.Source,
-	buildID, path, branch string) (int64, error) {
-	return mayRegisterIn(ctx, inv, newSourceForms(ctx, inv), module, built, buildID, path, branch)
+	ask registrationAsk, path, branch string) (int64, error) {
+	return mayRegisterIn(ctx, inv, newSourceForms(ctx, inv), module, built, ask, path, branch)
+}
+
+// registrationAsk is what a registration's warrant is read from (novox/hq ADR 0501 §3): the build an outcome answers,
+// whose kept request says whether it was asked at the terminal or for a merge (build-agent's outcome, the builder's own
+// module until R4g); or, for a take-in from the builder's done key, the merge the indexer's trunk value names and
+// whether the operator asked the registration at the controller's terminal (ADR 0501 §4). A key asks no build, so it
+// keeps no request.
+type registrationAsk struct {
+	// Build is the build whose kept request is read; empty for a take-in from a key.
+	Build string
+	// Merge is the commit of the merge a key's module is registered from (the indexer's trunk value); empty for an
+	// outcome, whose request names it.
+	Merge string
+	// Terminal is a key registration the operator asked at the controller's terminal for this repository and path.
+	Terminal bool
+}
+
+// String is the ask as the registration's words name it.
+func (a registrationAsk) String() string {
+	switch {
+	case a.Build != "":
+		return a.Build
+	case a.Terminal:
+		return "the registration asked at the terminal"
+	case a.Merge != "":
+		return fmt.Sprintf("the merge %.8s", a.Merge)
+	}
+	return "a key"
 }
 
 // catalogueReader is the catalogue's manifests, as the router's records are found in them.
@@ -490,15 +529,19 @@ type registrations interface {
 
 // mayRegisterIn is mayRegisterFrom on what it reads of the mesh handed in.
 func mayRegisterIn(ctx context.Context, inv registrations, forms *sourceForms, module string, built inventory.Source,
-	buildID, path, branch string) (int64, error) {
+	ask registrationAsk, path, branch string) (int64, error) {
+	buildID := ask.String()
 	was, err := inv.SourceOf(ctx, module)
 	isNew := errors.Is(err, inventory.ErrNoSuchModule)
 	if err != nil && !isNew {
 		return 0, err
 	}
-	terminal, err := askedHereFor(ctx, inv, forms, buildID, built, path)
-	if err != nil {
-		return 0, err
+	terminal := ask.Terminal
+	if ask.Build != "" {
+		var err error
+		if terminal, err = askedHereFor(ctx, inv, forms, ask.Build, built, path); err != nil {
+			return 0, err
+		}
 	}
 	refuse := func(why string) (int64, error) {
 		return 0, fmt.Errorf("%w: %s. A module is registered from such a source only by a build asked at the "+
@@ -542,7 +585,7 @@ func mayRegisterIn(ctx context.Context, inv registrations, forms *sourceForms, m
 	// The forge's protection and the repository's identity are checked below as for every registration.
 	movedWhy := ""
 	if why != "" && !terminal {
-		accepted, err := approvedMove(ctx, inv, forms, buildID, built)
+		accepted, err := approvedMove(ctx, inv, forms, ask, built)
 		switch {
 		case err == nil:
 			movedWhy, why = accepted, ""
@@ -661,65 +704,3 @@ func sourceWords(repository, seat string) string {
 	}
 	return buildSource{Repository: repository, Seat: seat}.String()
 }
-
-// firstBuildWarrant is what the controller checked before it asks the first build of the modules a merge adds to a
-// repository nothing is built from: the merge was made on the operator's Approve of its head (approvedAnnounced). It
-// travels in the context of that ask alone, in this process, so no verb carries one.
-type firstBuildWarrant struct {
-	repository string // owner/name on the git seat
-	paths      map[string]bool
-	why        string
-}
-
-type firstBuildWarrantKey struct{}
-
-// withFirstBuildWarrant is ctx carrying the warrant for asking the first builds of paths in repository.
-func withFirstBuildWarrant(ctx context.Context, repository string, paths []string, why string) context.Context {
-	w := &firstBuildWarrant{repository: repository, paths: map[string]bool{}, why: why}
-	for _, p := range paths {
-		w.paths[strings.Trim(p, "/")] = true
-	}
-	return context.WithValue(ctx, firstBuildWarrantKey{}, w)
-}
-
-func firstBuildWarrantIn(ctx context.Context) *firstBuildWarrant {
-	w, _ := ctx.Value(firstBuildWarrantKey{}).(*firstBuildWarrant)
-	return w
-}
-
-// covers says the warrant is for exactly this ask: the repository on the git seat, and a module path the merge holds.
-func (w *firstBuildWarrant) covers(source buildSource, path string) bool {
-	return w != nil && source.Seat == gitSeat && strings.EqualFold(strings.Trim(source.Repository, "/"), w.repository) &&
-		w.paths[strings.Trim(path, "/")]
-}
-
-// verbMayAsk refuses, for a call through a verb, a build of a repository the catalogue builds no module from
-// (novox/hq ADR 0266): the build node would run what an agent wrote, and its outcome could never be
-// registered anyway. url is the repository as it is cloned. At the terminal anything may be asked.
-func verbMayAsk(ctx context.Context, source buildSource, url, path string) error {
-	if startedAtTheTerminal() {
-		return nil
-	}
-	// **Or the first build of a module a merge adds on the operator's Approve** (novox/hq ADR 0432, issue 1146): the
-	// controller's own ask, carrying the warrant it checked, for that repository and the module paths the merge holds.
-	if firstBuildWarrantIn(ctx).covers(source, path) {
-		return nil
-	}
-	open, err := openStores(ctx)
-	if err != nil {
-		return err
-	}
-	defer open.Close()
-	entries, err := open.inventory.Catalogued(ctx)
-	if err != nil {
-		return err
-	}
-	forms := newSourceForms(ctx, open.inventory)
-	if forms.buildsFrom(entries, source.Repository, source.Seat) || forms.buildsFrom(entries, url, "") {
-		return nil
-	}
-	return terminalRefusal("%s is no repository the catalogue builds a module from, and a build of any other is "+
-		"asked at the controller's terminal only, never through a verb: a build node runs what the repository "+
-		"says, and its outcome would register a module the next push sends — whoever may call a verb includes "+
-		"agents (novox/hq ADR 0266). Nothing was asked", source)
-}

cmd/mesh-controller/build_source_integration_test.go

@@ -129,27 +129,6 @@ func TestADeliveryFromTheRegisteredRepositoryIsRegistered(t *testing.T) {
 	}
 }
 
-func TestAVerbAsksNoBuildOfARepositoryTheCatalogueDoesNotBuildFrom(t *testing.T) {
-	theCatalogue(t)
-	ctx := t.Context()
-	t.Setenv(verbVar, "build")
-	t.Setenv(link.CallerVar, "node-tools.anchor, through the mesh-controller seat")
-	err := verbMayAsk(ctx, buildSource{Repository: "agent/sudo", Seat: "git"}, "http://forge.internal:20000/agent/sudo.git", "")
-	var policy *heldAtTheTerminal
-	if !errors.As(err, &policy) {
-		t.Fatalf("a verb's build of an agent's repository was asked: %v", err)
-	}
-	if err := verbMayAsk(ctx, buildSource{Repository: "novox/mesh-catalog", Seat: "git"},
-		"http://forge.internal:20000/novox/mesh-catalog.git", ""); err != nil {
-		t.Fatalf("a verb's build of the catalogue repository was refused: %v", err)
-	}
-	t.Setenv(verbVar, "")
-	t.Setenv(link.CallerVar, "")
-	if err := verbMayAsk(ctx, buildSource{Repository: "agent/sudo", Seat: "git"}, "", ""); err != nil {
-		t.Fatalf("the terminal was refused: %v", err)
-	}
-}
-
 func TestARollbackNeverPutsBackABuildFromAnotherRepository(t *testing.T) {
 	open := theCatalogue(t)
 	ctx := t.Context()

cmd/mesh-controller/build_source_test.go

@@ -102,16 +102,17 @@ func init() {
 // The forge applies one rule to a branch: the rule named for it, else the first glob that covers it. A stronger
 // rule later in the list is not what guards the branch, and is not read as if it were (the confirmation review).
 func TestTheRuleJudgedIsTheOneTheForgeApplies(t *testing.T) {
-	guarded := protectionRule{Rule: "*", RequiredStatuses: []string{"mesh/merge-gate"}}
-	open := protectionRule{Rule: "main", Push: true, RequiredStatuses: []string{"mesh/merge-gate"}}
+	tools := []string{forgeToolsAccount}
+	guarded := protectionRule{Rule: "*", MergeWhitelist: tools}
+	open := protectionRule{Rule: "main", Push: true, MergeWhitelist: tools}
 	if f := judgedRule([]protectionRule{guarded, open}, "main"); f.Guarded {
 		t.Error("an exact rule letting pushes was passed over for a glob that guards")
 	}
-	if f := judgedRule([]protectionRule{{Rule: "ma*", RequiredStatuses: nil}, {Rule: "*", RequiredStatuses: []string{"x"}}},
+	if f := judgedRule([]protectionRule{{Rule: "ma*", MergeWhitelist: nil}, {Rule: "*", MergeWhitelist: tools}},
 		"main"); f.Guarded || !strings.Contains(f.Why, "ma*") {
 		t.Errorf("the first glob covering the branch was not the one judged: %+v", f)
 	}
-	if f := judgedRule([]protectionRule{{Rule: "release/*"}, {Rule: "main", RequiredStatuses: []string{"x"}}}, "main"); !f.Guarded {
+	if f := judgedRule([]protectionRule{{Rule: "release/*"}, {Rule: "main", MergeWhitelist: tools}}, "main"); !f.Guarded {
 		t.Errorf("the rule named for the branch was not judged: %+v", f)
 	}
 	if f := judgedRule(nil, "main"); f.Guarded {
@@ -119,6 +120,39 @@ func TestTheRuleJudgedIsTheOneTheForgeApplies(t *testing.T) {
 	}
 }
 
+// **A module's trunk is trusted when it takes no push, only the tools' account and people's own logins merge into it,
+// and no administrator merges past its rule** (novox/hq ADR 0534 §2, §6): the forge requires no status to merge (§1), so
+// a rule requiring none is trusted; one with no merge whitelist, no tools' account in it, an agent's account in it, a
+// push allowed or an administrator's override is not.
+func TestATrunkIsTrustedForItsMergersNotForAStatus(t *testing.T) {
+	tools := []string{forgeToolsAccount}
+	for _, c := range []struct {
+		name string
+		rule protectionRule
+		want bool
+		why  string
+	}{
+		{"no status, no push, the tools alone merge", protectionRule{Rule: "main", MergeWhitelist: tools}, true, ""},
+		{"a status required as well", protectionRule{Rule: "main", MergeWhitelist: tools, RequiredStatuses: []string{"mesh/check"}}, true, ""},
+		{"no merge whitelist", protectionRule{Rule: "main"}, false, "merge whitelist"},
+		{"an empty merge whitelist", protectionRule{Rule: "main", MergeWhitelist: []string{}}, false, "merge whitelist"},
+		{"the operator's own login beside the tools", protectionRule{Rule: "main", MergeWhitelist: []string{forgeToolsAccount, "jschoubben"}}, true, ""},
+		{"an agent's account in the whitelist", protectionRule{Rule: "main", MergeWhitelist: []string{forgeToolsAccount, "agent-ace"}}, false, "agent-ace"},
+		{"an agent's account alone", protectionRule{Rule: "main", MergeWhitelist: []string{"agent-ace"}}, false, "agent-ace"},
+		{"a person's login without the tools", protectionRule{Rule: "main", MergeWhitelist: []string{"jschoubben"}}, false, forgeToolsAccount},
+		{"a push allowed", protectionRule{Rule: "main", Push: true, MergeWhitelist: tools}, false, "push"},
+		{"an administrator's override", protectionRule{Rule: "main", MergeWhitelist: tools, AdminMayOverride: true}, false, "administrator"},
+	} {
+		f := judgedRule([]protectionRule{c.rule}, "main")
+		if f.Guarded != c.want || !strings.Contains(f.Why, c.why) {
+			t.Errorf("%s: %+v, want guarded %v saying %q", c.name, f, c.want, c.why)
+		}
+		if strings.Contains(f.Why, "requires no status") {
+			t.Errorf("%s: a trunk is still judged on a required status: %s", c.name, f.Why)
+		}
+	}
+}
+
 // An id the forge could not give keeps the id already recorded.
 
 // **The operator's Approve of a reviewed group registers a moved module from its new repository** (novox/hq ADR 0420 §7,

cmd/mesh-controller/build_test.go

@@ -2,12 +2,10 @@ package main
 
 import (
 	"bytes"
-	"reflect"
 	"strings"
 	"testing"
 	"time"
 
-	sdkdelivery "git.novox.be/novox/mesh-sdk/go/delivery"
 	"github.com/novox/mesh-controller/internal/inventory"
 	"github.com/novox/mesh-controller/internal/link"
 )
@@ -68,12 +66,3 @@ func TestBuildsSaysTheSourceFingerprint(t *testing.T) {
 		t.Errorf("the other lines changed:\n%s\nwant\n%s", plain.String(), want)
 	}
 }
-
-// 1215/AC4: what the builder said of the inputs is what the controller keeps of the build.
-func TestTheControllerKeepsTheInputsABuilderSaid(t *testing.T) {
-	in := &sdkdelivery.SourceInputs{Module: "mailu", Tree: "t", Toolchains: map[string]string{"code": "ts sha256:aa 01"}}
-	kept := buildFrom(link.BuildResult{ID: "build-1", Repository: "r", Commit: "c", SourceFingerprint: "src1:x", SourceInputs: in})
-	if !reflect.DeepEqual(kept.SourceInputs, in) {
-		t.Errorf("the controller keeps %+v, the builder said %+v", kept.SourceInputs, in)
-	}
-}

cmd/mesh-controller/builder_on_the_bus_test.go

@@ -0,0 +1,109 @@
+//go:build integration
+
+package main
+
+import (
+	"context"
+	"testing"
+
+	sdkdelivery "git.novox.be/novox/mesh-sdk/go/delivery"
+	"github.com/nats-io/nats.go/jetstream"
+	"github.com/novox/mesh-controller/internal/broker"
+	"github.com/novox/mesh-controller/internal/testbus"
+)
+
+// builderOnTheBus is the builder's and the indexer's buckets on a test's own bus, which the controller's connection for
+// the moment (servingBus) reaches: what a take-in from a key reads (R4e, issue 1851).
+type builderOnTheBus struct {
+	js                         *broker.JetStream
+	builds, modules, manifests jetstream.KeyValue
+}
+
+func aBuilderOnTheBus(t *testing.T) builderOnTheBus {
+	t.Helper()
+	js, err := broker.Dial(testbus.URL(t))
+	if err != nil {
+		t.Fatal(err)
+	}
+	t.Cleanup(js.Close)
+	api, err := jetstream.New(js.Conn())
+	if err != nil {
+		t.Fatal(err)
+	}
+	ctx := t.Context()
+	b := builderOnTheBus{js: js}
+	for _, c := range []struct {
+		into    *jetstream.KeyValue
+		bucket  string
+		history uint8
+	}{
+		{&b.builds, sdkdelivery.BuilderBuildsBucket, sdkdelivery.BuilderBuildsHistory},
+		{&b.modules, sdkdelivery.ModulesBucket, sdkdelivery.ModulesHistory},
+		{&b.manifests, sdkdelivery.ManifestsBucket, 1},
+	} {
+		kv, err := api.CreateKeyValue(ctx, jetstream.KeyValueConfig{Bucket: c.bucket, History: c.history})
+		if err != nil {
+			t.Fatal(err)
+		}
+		*c.into = kv
+	}
+	servingBus.Store(js)
+	t.Cleanup(func() { servingBus.Store(nil) })
+	withTrunkList(t, true)
+	// The indexer on this bus is read, not the "not held" a mesh with no bus reads (aMeshOnTheStore).
+	wasIndexed := indexedModule
+	indexedModule = theIndexedModule
+	t.Cleanup(func() { indexedModule = wasIndexed })
+	return b
+}
+
+// indexed writes the indexer's trunk value of module at commit, naming fp, and its manifest: a module of one archive.
+func (b builderOnTheBus) indexed(t *testing.T, module, version, repository, path, commit, fp string) string {
+	t.Helper()
+	keys, trunk := aKeyFor(module, version, fp, repository, path, commit)
+	raw := keys.manifests[trunk.Manifest]
+	value, err := sdkdelivery.EncodeManifest(sdkdelivery.Manifest{Module: module, JSON: raw})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if _, err := b.manifests.Put(context.Background(), trunk.Manifest, value); err != nil {
+		t.Fatal(err)
+	}
+	trunk.FP = "src1:" + fp[len("src2:"):]
+	encoded, err := sdkdelivery.EncodeModule(trunk)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if _, err := b.modules.Put(context.Background(), module, encoded); err != nil {
+		t.Fatal(err)
+	}
+	return trunk.Manifest
+}
+
+// built writes the builder's key of module at fp: done, its one archive named with a reference, or in another state.
+func (b builderOnTheBus) built(t *testing.T, module, version, fp, manifest, state string) {
+	t.Helper()
+	keys, _ := aKeyFor(module, version, fp, "", "", "")
+	v := keys.keys[module].Build
+	v.Manifest = manifest
+	if state != sdkdelivery.BuildDone {
+		v = sdkdelivery.BuilderBuild{State: state, By: "ace"}
+		if state == sdkdelivery.BuildFailed {
+			v.Error = "digests differ: ace sha256:1, g14 sha256:2"
+		}
+	}
+	value, err := sdkdelivery.EncodeBuilderBuild(v)
+	if err != nil {
+		t.Fatal(err)
+	}
+	key, err := sdkdelivery.BuilderBuildKey(module, fp)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if _, err := b.builds.Put(context.Background(), key, value); err != nil {
+		t.Fatal(err)
+	}
+}
+
+// theIndexedModule is the look at the indexer as the controller makes it, kept before any test replaces it.
+var theIndexedModule = indexedModule

cmd/mesh-controller/catch_up.go

@@ -241,10 +241,9 @@ func mergeAskPrefix(number int, head string) string {
 	return fmt.Sprintf("merge-%d-%s-", number, head)
 }
 
-// askersOfMerges are the askers a merge's warrant is read under: the teller, and mesh-delivery for a merge before release 3e
-// (ADR 0437 §6). Release 4's controller work stops accepting mesh-delivery (ADR 0450 §8); a merge asked under it earlier is
-// still found here until then.
-func askersOfMerges() []string { return []string{sdkdelivery.TellerModule, theDelivery} }
+// askersOfMerges are the askers a merge's warrant is read under: the teller alone (ADR 0437 §6), since R4e stopped taking
+// mesh-delivery's (ADR 0450 §8; issue 1318).
+func askersOfMerges() []string { return []string{sdkdelivery.TellerModule} }
 
 // caughtUpWarrant judges a chosen merge ask of the router as the warrant of a merge: the ask is the operator's, the warrant
 // answers that very ask as it was published, and it is the operator's Approve proved by the channel it came through (ADR 0437
@@ -391,9 +390,6 @@ var findMergeWarrant = func(ctx context.Context, inv catalogueReader, owner, rep
 			if asker == sdkdelivery.TellerModule && !strings.HasPrefix(id, sdkdelivery.AskKindMerge+"-") {
 				continue
 			}
-			if asker == theDelivery && !named {
-				continue
-			}
 			ask, w, err := closedRecordOf(ctx, inv, asker, id)
 			if err != nil {
 				return "", false, "", err

cmd/mesh-controller/catch_up_test.go

@@ -69,12 +69,12 @@ func TestAForgeThatDoesNotAnswerIsAnErrorNotAnEmptyTrunk(t *testing.T) {
 
 func TestACaughtUpMergeIsAcceptedOnTheSameWarrantAsAnAnnouncedOne(t *testing.T) {
 	ok := approvedMerge(t)
-	for _, asker := range []string{sdkdelivery.TellerModule, theDelivery} {
-		w := ok.warrant
-		w.Asker = asker
-		if _, err := caughtUpWarrant(asker, &ok.ask, &w); err != nil {
-			t.Errorf("the operator's Approve under %s was refused: %v", asker, err)
-		}
+	if _, err := caughtUpWarrant(sdkdelivery.TellerModule, &ok.ask, &ok.warrant); err != nil {
+		t.Errorf("the operator's Approve under the teller was refused: %v", err)
+	}
+	// 1318 (ADR 0450 §8): mesh-delivery's warrant of before the gate is no longer taken.
+	if _, err := caughtUpWarrant(theDelivery, &ok.ask, &ok.warrant); err == nil {
+		t.Error("a warrant under mesh-delivery was accepted")
 	}
 	if _, err := caughtUpWarrant("keycloak", &ok.ask, &ok.warrant); err == nil {
 		t.Error("a warrant of an asker the controller takes none from was accepted")
@@ -229,34 +229,6 @@ func TestAGroupsWarrantIsFoundByTheAsksWordsForThePullRequestAndItsHead(t *testi
 	}
 }
 
-// Keycloak's merge was asked as mesh-delivery.merge-378-b9104454f9a5-1, before release 3e: the id names the pull request and
-// the first twelve digits of its head, and the warrant is found by them under mesh-delivery.
-func TestAWarrantAskedUnderMeshDeliveryIsFoundByThePullRequestAndItsHead(t *testing.T) {
-	ok := approvedMerge(t)
-	head := "b9104454f9a5e0c4d3b2a1f0e9d8c7b6a5948372"
-	askID := "merge-378-b9104454f9a5-1"
-	ask, w := ok.ask, ok.warrant
-	ask.ID, w.Ask, w.Asker = askID, askID, theDelivery
-	w.AskDigest = ask.Digest()
-	withRouter(t, map[string]map[string]aRouterRecord{theDelivery: {
-		"merge-377-aaaaaaaaaaaa-1": {},
-		askID:                      {ask, w},
-	}})
-	why, found, reason, err := findMergeWarrant(t.Context(), nil, "novox", "mesh-catalog", 378, head)
-	if err != nil || !found || !strings.Contains(why, askID) {
-		t.Fatalf("the warrant was not found: %q %v %q %v", why, found, reason, err)
-	}
-	// Another head names another ask, and none is found.
-	if _, found, _, _ := findMergeWarrant(t.Context(), nil, "novox", "mesh-catalog", 378, "ffffffffffff0000"); found {
-		t.Fatal("another head found a warrant")
-	}
-	// A router that cannot be read is an error, never "no warrant".
-	routerAskIDs = func(context.Context, catalogueReader, string) ([]string, error) { return nil, errors.New("no answer") }
-	if _, found, _, err := findMergeWarrant(t.Context(), nil, "novox", "mesh-catalog", 378, head); found || err == nil {
-		t.Fatalf("an unreadable router read as no warrant: %v %v", found, err)
-	}
-}
-
 // A trunk shorter than a page, or with none, is read without a fault: the pages end when the forge's do.
 func TestAShortTrunkIsReadWholeAndAnEmptyOneIsNoMerges(t *testing.T) {
 	was := trunkCommitsPage

cmd/mesh-controller/chain.go

@@ -51,55 +51,13 @@ func attachTheChain(ctx context.Context, inv *inventory.Inventory, server *link.
 		fmt.Printf("chain: the builds are not laid out under their modules yet, and none is read until they are: %v\n", err)
 		go layBuildsOutSoon(ctx, inv)
 	}
-	// And the requests the move of delivery 1 found never handed over, asked again once (askAgain), once it is serving.
-	go askAgainSoon(ctx, inv)
+	// The requests the move of delivery 1 found never handed over are not asked again: the controller asks no build
+	// (novox/hq ADR 0501; issue 1851, A10), and the builder builds every fingerprint the indexer writes.
 	// And what delivery 1 recorded of what each machine was sent, copied onto the keys of the assignments (CopySentBuilds).
 	go copySentBuildsSoon(ctx, inv)
 	return nil
 }
 
-// askAgain asks once more for each build request the move found never handed over (novox/hq issue 981 note 7 Q5): the
-// requests a merge could not ask for, which a person's hand `build` would otherwise have to repeat. **At most once**: a
-// request is claimed before it is asked and settled after, so a crash between loses the ask, which is where it stood.
-func askAgain(ctx context.Context, inv *inventory.Inventory) {
-	pending, err := inv.RequestsToAskAgain(ctx)
-	if err != nil {
-		fmt.Printf("chain: the requests never handed over cannot be read: %v\n", err)
-		return
-	}
-	for _, r := range pending {
-		if claimed, err := inv.ClaimToAskAgain(ctx, r.ID); err != nil || !claimed {
-			if err != nil {
-				fmt.Printf("chain: %s cannot be claimed to be asked again: %v\n", r.ID, err)
-			}
-			continue
-		}
-		id, err := askABuild(ctx, buildSource{Repository: r.Repository, Seat: r.Seat}, r.Path, r.Ref)
-		if err != nil {
-			if serr := inv.AskedAgainAs(ctx, r.ID, "not asked again: "+err.Error()); serr != nil {
-				fmt.Printf("chain: %s was not asked again, and that could not be kept: %v\n", r.ID, serr)
-			}
-			fmt.Printf("chain: %s was never handed over and cannot be asked again: %v\n", r.ID, err)
-			continue
-		}
-		recordBuildRequest(ctx, inv, inventory.BuildRequest{ID: id, Repository: r.Repository, Seat: r.Seat, Path: r.Path,
-			Ref: r.Ref, Commit: r.Commit, For: r.For})
-		if err := inv.AskedAgainAs(ctx, r.ID, id); err != nil {
-			fmt.Printf("chain: %s was asked again as %s, and that could not be kept: %v\n", r.ID, id, err)
-		}
-		fmt.Printf("chain: %s, never handed over, is asked again as %s\n", r.ID, id)
-	}
-}
-
-// askAgainSoon waits for the controller to be serving, which an ask needs, and then asks again.
-func askAgainSoon(ctx context.Context, inv *inventory.Inventory) {
-	select {
-	case <-ctx.Done():
-	case <-time.After(time.Minute):
-		askAgain(ctx, inv)
-	}
-}
-
 // kindSentBuildsNotCopied is the condition of the one-time copy of node.sent_builds onto the assignments' keys that has not
 // succeeded: until it has, a module an assignment pulled in may be missing from what a machine is read to run.
 const kindSentBuildsNotCopied = "sent-builds-not-copied"

cmd/mesh-controller/chain_integration_test.go

@@ -14,7 +14,6 @@ import (
 	"github.com/novox/mesh-controller/internal/chain"
 	"github.com/novox/mesh-controller/internal/inventory"
 	"github.com/novox/mesh-controller/internal/lease"
-	"github.com/novox/mesh-controller/internal/link"
 )
 
 // **Acceptance 10 of design 47: one read of an assignment names the commit, the build and the rollout that put it there,
@@ -80,7 +79,7 @@ func TestOneReadOfAnAssignmentNamesItsCommitBuildAndRolloutAndOneReadOfTheRollou
 	if err != nil {
 		t.Fatal(err)
 	}
-	for try := 0; try < 3 && (asking.Modules["notes"] == nil || asking.Modules["notes"].Build == ""); try++ {
+	for try := 0; try < 6 && (asking.Modules["notes"] == nil || asking.Modules["notes"].Build == "" || asking.Modules["notes"].State == "asked"); try++ {
 		advancePlans(ctx, open)
 		if asking, err = inv.PlanByID(ctx, rollout); err != nil {
 			t.Fatal(err)
@@ -90,13 +89,6 @@ func TestOneReadOfAnAssignmentNamesItsCommitBuildAndRolloutAndOneReadOfTheRollou
 	if buildID == "" || len(*asked) != 1 || !strings.HasSuffix((*asked)[0], "#"+buildID) {
 		t.Fatalf("the walk asked %v, and notes' build is %q", *asked, buildID)
 	}
-	digest := "sha256:" + strings.Repeat("a", 64)
-	result := outcome(buildID, "modules/notes", "c-notes", "notes", "")
-	result.ReuseKey = "rk-notes"
-	result.Made = []link.MadeArtifact{{Name: "notes", Kind: "image", Reference: "artifact-store://notes/notes@" + digest}}
-	if err := (builds{inv: inv, open: open}).Built(ctx, result); err != nil {
-		t.Fatal(err)
-	}
 
 	// The walk sends the tier to its first machine.
 	for try := 0; try < 3 && len(sent) == 0; try++ {
@@ -116,9 +108,9 @@ func TestOneReadOfAnAssignmentNamesItsCommitBuildAndRolloutAndOneReadOfTheRollou
 	if wireguard, pulled := assignmentOf(on, "mesh-wireguard"); pulled && (wireguard.Build != "" || wireguard.Rollout != "") {
 		t.Fatalf("a module this rollout did not send names a build or a rollout: %+v", wireguard)
 	}
-	if a.Module != "notes" || a.Commit != "c-notes" || a.Build != buildID || a.Rollout != rollout || a.Artifact != digest ||
+	if a.Module != "notes" || a.Commit != "c-notes" || a.Build != buildID || a.Rollout != rollout ||
 		a.Since.IsZero() || a.Assigned.IsZero() || !a.Stands() {
-		t.Fatalf("the assignment names %+v, not commit c-notes, build %s, artifact %s, rollout %s", a, buildID, digest, rollout)
+		t.Fatalf("the assignment names %+v, not commit c-notes, build %s, rollout %s", a, buildID, rollout)
 	}
 	// One read of the rollout.
 	p, err := inv.PlanByID(ctx, rollout)
@@ -130,16 +122,11 @@ func TestOneReadOfAnAssignmentNamesItsCommitBuildAndRolloutAndOneReadOfTheRollou
 		p.Steps[0].Node != "anchor" || p.Steps[0].Sent == nil {
 		t.Fatalf("the rollout lists changed %+v, builds %v, steps %+v; want %+v", p.Changed, p.Builds, p.Steps, wantChange)
 	}
-	// And one read of the build names the same commit, with what it published and its reuse key.
+	// And one read of the build names the same commit.
 	built, found, err := inv.BuildByID(ctx, buildID)
 	if err != nil || !found || built.Commit != "c-notes" || built.Module != "notes" {
 		t.Fatalf("the build: %+v %v %v", built, found, err)
 	}
-	lately, err := inv.Builds(ctx, "notes", 1)
-	if err != nil || len(lately) != 1 || lately[0].ReuseKey != "rk-notes" || lately[0].Published == nil ||
-		lately[0].Published.Artifact != digest {
-		t.Fatalf("what the build published: %+v %v", lately, err)
-	}
 	// The verbs say the links.
 	if lines := changedLines(p); len(lines) != 2 || !strings.Contains(lines[1], "anchor/notes") ||
 		!strings.Contains(lines[1], buildID) {

cmd/mesh-controller/chain_no_table_integration_test.go

@@ -6,8 +6,6 @@ import (
 	"strings"
 	"testing"
 	"time"
-
-	"github.com/novox/mesh-controller/internal/link"
 )
 
 // **Acceptance 12 of design 47: no table in the controller's store holds builds, rollouts or assignments** (novox/hq ADR
@@ -34,7 +32,7 @@ func TestNoTableOfTheControllersStoreHoldsBuildsRolloutsOrAssignments(t *testing
 	if err != nil {
 		t.Fatal(err)
 	}
-	for try := 0; try < 3 && (asking.Modules["notes"] == nil || asking.Modules["notes"].Build == ""); try++ {
+	for try := 0; try < 6 && (asking.Modules["notes"] == nil || asking.Modules["notes"].Build == "" || asking.Modules["notes"].State == "asked"); try++ {
 		advancePlans(ctx, open)
 		if asking, err = inv.PlanByID(ctx, rollout); err != nil {
 			t.Fatal(err)
@@ -44,12 +42,6 @@ func TestNoTableOfTheControllersStoreHoldsBuildsRolloutsOrAssignments(t *testing
 	if buildID == "" || len(*asked) != 1 {
 		t.Fatalf("the walk asked %v, and notes' build is %q", *asked, buildID)
 	}
-	digest := "sha256:" + strings.Repeat("b", 64)
-	result := outcome(buildID, "modules/notes", "c-notes", "notes", "")
-	result.Made = []link.MadeArtifact{{Name: "notes", Kind: "image", Reference: "artifact-store://notes/notes@" + digest}}
-	if err := (builds{inv: inv, open: open}).Built(ctx, result); err != nil {
-		t.Fatal(err)
-	}
 
 	// What the live path made is in the chain.
 	if built, found, err := inv.BuildByID(ctx, buildID); err != nil || !found || built.Commit != "c-notes" {

cmd/mesh-controller/changeplan.go

@@ -190,32 +190,3 @@ func summaryOf(p link.ChangePlan) string {
 	}
 	return strings.Join(parts, "; ")
 }
-
-// planText is a change plan as a person reads it, for the pull request's comment.
-func planText(p link.ChangePlan) string {
-	var b strings.Builder
-	fmt.Fprintf(&b, "change plan of %s at %.8s into %s: %s\n", p.Repository, p.Head, p.Base, p.Summary)
-	for i, tier := range p.Tiers {
-		fmt.Fprintf(&b, "  tier %d: %s\n", i, strings.Join(tier, ", "))
-	}
-	for _, m := range p.Machines {
-		line := "  " + m.Machine + ": "
-		if len(m.Receives) > 0 {
-			line += "receives " + strings.Join(m.Receives, ", ")
-		}
-		if len(m.Waits) > 0 {
-			if len(m.Receives) > 0 {
-				line += "; "
-			}
-			line += "waits for a person: " + strings.Join(m.Waits, ", ")
-		}
-		b.WriteString(line + "\n")
-	}
-	for _, s := range p.Steps {
-		b.WriteString("  - " + s + "\n")
-	}
-	if len(p.Unread) > 0 {
-		fmt.Fprintf(&b, "  read by no module's build: %s\n", strings.Join(p.Unread, ", "))
-	}
-	return b.String()
-}

cmd/mesh-controller/changeplan_test.go

@@ -72,7 +72,4 @@ func TestAChangePlanSaysWhatEachMachineReceives(t *testing.T) {
 	if !strings.HasPrefix(p.Summary, "builds nothing") || len(p.Machines) != 0 || strings.Join(p.Unread, ",") != "merge-check.sh" {
 		t.Errorf("a root file's plan reads %+v", p)
 	}
-	if !strings.Contains(planText(p), "read by no module's build: merge-check.sh") {
-		t.Errorf("the plan's text does not say why nothing is built:\n%s", planText(p))
-	}
 }

cmd/mesh-controller/check_builds.go

@@ -1,87 +0,0 @@
-package main
-
-import (
-	"context"
-	"errors"
-	"fmt"
-	"os"
-	"strconv"
-
-	"github.com/novox/mesh-controller/internal/builder"
-	"github.com/novox/mesh-controller/internal/inventory"
-)
-
-// A pull request's check builds go when it closes (novox/hq ADR 0350 §5): the build seat keeps them in the artifact
-// store's scratch namespace for the walk of its merge to take. **Let go of where the moment is heard**: the
-// controller ends the walk answering a merge — after that walk took what it reuses — and the delivery's owner, which
-// hears the forge say a pull request closed unmerged, asks the `forget-checks` verb; both let go through the store,
-// as the controller's own collection does. The build seat's holders let go of anything a week old on their own,
-// so a word lost here leaves a week's builds, never more.
-
-// checkBuildsIn is the scratch namespace as the controller reaches the artifact store.
-func checkBuildsIn(ctx context.Context, inv *inventory.Inventory) (builder.Scratch, error) {
-	shelf, err := inv.Catalogue(ctx)
-	if err != nil {
-		return nil, err
-	}
-	address, err := artifactStoreAddress(ctx, inv, shelf, "")
-	if err != nil {
-		return nil, err
-	}
-	if address == "" {
-		return nil, errors.New("the artifact store is not on the mesh's network")
-	}
-	return builder.Registry{Address: address}, nil
-}
-
-// forgetChecks lets go of a pull request's check builds and answers what it did.
-var forgetChecks = func(ctx context.Context, inv *inventory.Inventory, pull builder.PullRef) (string, error) {
-	scratch, err := checkBuildsIn(ctx, inv)
-	if err != nil {
-		return "", err
-	}
-	n, err := scratch.Forget(ctx, pull)
-	if err != nil {
-		return "", fmt.Errorf("%s: %d check(s)' builds let go of, and not all: %w", pull, n, err)
-	}
-	return fmt.Sprintf("%s: %d check(s)' builds let go of", pull, n), nil
-}
-
-// forgetChecksOfWalk lets go, on the save that ends a walk, of the check builds of every pull request whose merge
-// it answers: the walk took what it reuses. Said, never fatal.
-func forgetChecksOfWalk(ctx context.Context, inv *inventory.Inventory, p inventory.Plan) {
-	if p.WalkSaid != inventory.WalkEnded || p.Delivery == nil {
-		return
-	}
-	for _, pull := range reuseAskOf(&p).Pulls {
-		said, err := forgetChecks(ctx, inv, builder.PullRef{Owner: pull.Owner, Repo: pull.Repo, Number: pull.Number})
-		if err != nil {
-			fmt.Fprintf(os.Stderr, "%s: its check builds stay until the week's sweep: %v\n", p.ID, err)
-			continue
-		}
-		fmt.Printf("%s: %s\n", p.ID, said)
-	}
-}
-
-// forgetChecksCommand is `forget-checks <owner> <repo> <number>`: the verb the delivery's owner asks when the forge
-// says a pull request closed unmerged (novox/hq ADR 0350 §5).
-func forgetChecksCommand(ctx context.Context, args []string) error {
-	if len(args) != 3 {
-		return errors.New("forget-checks <owner> <repo> <number>")
-	}
-	number, err := strconv.Atoi(args[2])
-	if err != nil || number <= 0 {
-		return fmt.Errorf("%q is not a pull request's number", args[2])
-	}
-	open, err := openStores(ctx)
-	if err != nil {
-		return err
-	}
-	defer open.Close()
-	said, err := forgetChecks(ctx, open.inventory, builder.PullRef{Owner: args[0], Repo: args[1], Number: number})
-	if err != nil {
-		return err
-	}
-	fmt.Println(said)
-	return nil
-}

cmd/mesh-controller/check_builds_integration_test.go

@@ -1,102 +0,0 @@
-//go:build integration
-
-package main
-
-import (
-	"encoding/json"
-	"reflect"
-	"strings"
-	"testing"
-	"time"
-
-	"git.novox.be/novox/mesh-sdk/go/catalogue"
-	"github.com/novox/mesh-controller/internal/inventory"
-	"github.com/novox/mesh-controller/internal/link"
-)
-
-func TestOnlyAWalksAskTakesAChecksBuildAndADryRunNever(t *testing.T) {
-	p := &inventory.Plan{Delivery: &inventory.PlanDelivery{Merges: []inventory.PlanMerge{
-		{Repository: "novox/shop", Number: 7}, {Repository: "http://forge.invalid/novox/web.git", Number: 3},
-		{Repository: "novox/shop", Number: 7}, {Repository: "novox/shop"}}}}
-	asked := reuseAskOf(p)
-	if want := []link.PullRef{{Owner: "novox", Repo: "shop", Number: 7}, {Owner: "novox", Repo: "web", Number: 3}}; !reflect.DeepEqual(asked.Pulls, want) {
-		t.Fatalf("the walk names %+v", asked.Pulls)
-	}
-	walk := withReuse(t.Context(), asked)
-	if reuseAsked(walk, false) != asked {
-		t.Fatal("a walk's ask does not carry its leave")
-	}
-	if reuseAsked(walk, true) != nil {
-		t.Fatal("a dry run carries a leave to take a check's build")
-	}
-	if reuseAsked(t.Context(), false) != nil {
-		t.Fatal("an ask that is not a walk's carries a leave")
-	}
-}
-
-func TestAReusedCheckBuildIsRegisteredByItsDigestAndGatedAsABuiltOne(t *testing.T) {
-	withTheGate(t) // the first-machine gate's own path (novox/hq ADR 0360 keeps it for earlier walks)
-	g := aGateMesh(t)
-	ctx := t.Context()
-	inv := g.open.inventory
-	gateEvery = 0
-
-	digest := "sha256:" + strings.Repeat("c", 64)
-	reused := func(id, reference string) link.BuildResult {
-		manifest := mustJSON(t, catalogue.Manifest{Module: "app", Version: "c3", Resources: []map[string]any{
-			{"id": "svc", "type": "container", "name": "app", "image": reference}}})
-		return link.BuildResult{ID: id, Repository: "novox/mesh-catalog", Path: "modules/app", Ref: "main", On: "anchor",
-			Commit: "c3", Manifest: manifest, Trunk: "main", OnTrunk: true, Branches: []string{"main"},
-			Made:   []link.MadeArtifact{{Name: "server", Kind: "image", Reference: reference}},
-			Source: &link.SourceOnSeat{Seat: "git", Repository: "novox/mesh-catalog"},
-			Reused: "reused from the check of novox/mesh-catalog#9 at head abcdefabcdef (merged into trunk 123456123456): server " + digest,
-			ReusedFrom: &link.ReusedFrom{Pull: link.PullRef{Owner: "novox", Repo: "mesh-catalog", Number: 9},
-				Head: "abcdefabcdef", Trunk: "123456123456", Key: "r1:" + strings.Repeat("1", 64)}}
-	}
-	if _, _, err := takeIn(ctx, inv, reused(link.NewBuildID(time.Now()), "store.internal:5000/scratch/app/server@"+digest)); err == nil ||
-		!strings.Contains(err.Error(), "scratch") {
-		t.Fatalf("a build in the scratch namespace was registered: %v", err)
-	}
-	id := link.NewBuildID(time.Now().Add(time.Second))
-	result := reused(id, "store.internal:5000/app/server@"+digest)
-	if _, _, err := takeIn(ctx, inv, result); err != nil {
-		t.Fatal(err)
-	}
-	current, err := inv.CurrentBuilds(ctx)
-	if err != nil || current["app"].Commit != "c3" {
-		t.Fatalf("the reused build is not what app is registered at: %+v %v", current["app"], err)
-	}
-	shelf, err := inv.Catalogue(ctx)
-	if err != nil {
-		t.Fatal(err)
-	}
-	raw, _ := json.Marshal(shelf["app"].Resources)
-	if !strings.Contains(string(raw), "app/server@"+digest) {
-		t.Fatalf("app is registered as %s, not by the check's digest in its own namespace", raw)
-	}
-
-	// The walk asked it: the walk keeps what its build did, and its gate judges the registered build.
-	asked := time.Now().UTC()
-	p := g.plan(t)
-	p.Commit = "c3"
-	p.Modules["app"] = &inventory.PlanModule{State: "asked", AskedAt: &asked, Build: id}
-	if err := inv.SavePlan(ctx, &p); err != nil {
-		t.Fatal(err)
-	}
-	planBuiltSaying(ctx, g.open, "app", "c3", "", asked, id, result.MadeWords())
-	p = g.plan(t)
-	if m := p.Modules["app"]; m.State != "built" || !strings.HasPrefix(m.Made, "reused from the check of novox/mesh-catalog#9") {
-		t.Fatalf("the walk keeps %+v", m)
-	}
-	for i := 0; i < 6; i++ {
-		advancePlans(ctx, g.open)
-	}
-	p = g.plan(t)
-	gate := p.Modules["app"].Gate
-	if gate == nil || gate.To != "c3" || gate.Verdict != inventory.GatePassed {
-		t.Fatalf("the gate judged %+v, not the reused build", gate)
-	}
-	if sent, _, _ := inv.SentBuilds(ctx, "anchor"); sent["app"] != "c3" {
-		t.Fatalf("the first machine was sent %v, not the reused build", sent)
-	}
-}

cmd/mesh-controller/check_builds_test.go

@@ -1,193 +0,0 @@
-package main
-
-import (
-	"context"
-	"errors"
-	"reflect"
-	"strings"
-	"testing"
-
-	"git.novox.be/novox/mesh-sdk/go/catalogue"
-	"github.com/novox/mesh-controller/internal/builder"
-	"github.com/novox/mesh-controller/internal/inventory"
-	"github.com/novox/mesh-controller/internal/link"
-)
-
-// One build per change (novox/hq ADR 0350), as the controller asks it and takes it in.
-
-// The check of a change is asked to build what a merge of it would move, in the walk's order: a module of the
-// repository checked from the merge, one standing on it from its own repository as the walk builds it, and one
-// that reads the repository through a context not at all. A change that moves no module builds nothing.
-func TestACheckIsAskedToBuildWhatTheMergeWouldMove(t *testing.T) {
-	entries := []inventory.Entry{
-		{Manifest: catalogue.Manifest{Module: "app"}, Source: inventory.Source{Repository: "novox/shop", Seat: "git", Path: "modules/app"}},
-		{Manifest: catalogue.Manifest{Module: "web"}, Source: inventory.Source{Repository: "novox/web", Seat: "git", Ref: "main"}},
-		{Manifest: catalogue.Manifest{Module: "docs"}, Source: inventory.Source{Repository: "novox/docs", Seat: "git"}},
-	}
-	p := link.PullUpdated{Owner: "novox", Repo: "shop", Number: 7, Base: "main", Commit: "abc"}
-	scope := checkScope{Reach: mergeReach{Packaging: entries[2:], Plan: inventory.Plan{Tiers: [][]string{{"app", "docs"}, {"web"}}}}}
-	clone := func(s inventory.Source) (string, error) { return "http://forge.invalid/" + s.Repository + ".git", nil }
-
-	got := checkBuildsOf(p, scope, entries, clone)
-	want := []link.CheckBuild{
-		{Module: "app", Path: "modules/app", Merged: true, Tier: 0},
-		{Module: "docs", Tier: 0, Skip: "its build reads novox/shop through a context, which a check cannot hand the merge"},
-		{Module: "web", Repository: "http://forge.invalid/novox/web.git", Ref: "main", Tier: 1},
-	}
-	if !reflect.DeepEqual(got, want) {
-		t.Fatalf("the check is asked to build\n%+v\nwant\n%+v", got, want)
-	}
-	if got := checkBuildsOf(p, checkScope{}, entries, clone); got != nil {
-		t.Fatalf("a change that moves no module asks for builds: %+v", got)
-	}
-}
-
-// A walk's ask carries its leave to take a check's build, naming the pull requests of the merges it answers; a dry
-// run never does, and neither does an ask that is not a walk's.
-
-// A walk ended lets go of its merges' check builds — only once it ended, after it took what it reuses.
-func TestAWalkEndedLetsGoOfItsMergesCheckBuilds(t *testing.T) {
-	var forgot []builder.PullRef
-	was := forgetChecks
-	forgetChecks = func(_ context.Context, _ *inventory.Inventory, pull builder.PullRef) (string, error) {
-		forgot = append(forgot, pull)
-		return "", nil
-	}
-	t.Cleanup(func() { forgetChecks = was })
-	p := inventory.Plan{ID: "plan-1", Delivery: &inventory.PlanDelivery{Merges: []inventory.PlanMerge{
-		{Repository: "novox/shop", Number: 7}}}}
-
-	p.WalkSaid = inventory.WalkStarted
-	forgetChecksOfWalk(t.Context(), nil, p)
-	p.WalkSaid = ""
-	forgetChecksOfWalk(t.Context(), nil, p)
-	if len(forgot) != 0 {
-		t.Fatalf("a walk not ended let go of %v, which it may still take", forgot)
-	}
-	p.WalkSaid = inventory.WalkEnded
-	forgetChecksOfWalk(t.Context(), nil, p)
-	if want := []builder.PullRef{{Owner: "novox", Repo: "shop", Number: 7}}; !reflect.DeepEqual(forgot, want) {
-		t.Fatalf("the walk ended let go of %v", forgot)
-	}
-}
-
-// A build in the scratch namespace is never registered: only the walk's copy in the module's own namespace is.
-func TestABuildInTheScratchNamespaceIsNeverRegistered(t *testing.T) {
-	if got := inScratch([]link.MadeArtifact{{Name: "server", Reference: "store.internal:5000/app/server@sha256:aa"}}); got != "" {
-		t.Fatalf("a module's own build reads as a scratch build: %s", got)
-	}
-	scratch := "store.internal:5000/scratch/app/server@sha256:aa"
-	if got := inScratch([]link.MadeArtifact{{Name: "server", Reference: scratch}}); got != scratch {
-		t.Fatalf("a scratch build was not found: %q", got)
-	}
-	if got := inScratch([]link.MadeArtifact{{Name: "look", Reference: "http://store.internal:5000/v2/scratch/app/look/blobs/sha256:bb"}}); got == "" {
-		t.Fatal("a scratch archive was not found")
-	}
-}
-
-// The walk says per module what it did: "reused from …" or "built: <why>" — and a build seat from before says
-// neither, which is said.
-func TestAWalksBuildSaysWhetherItReusedOrBuilt(t *testing.T) {
-	if got := (link.BuildResult{Reused: "reused from the check of novox/shop#7"}).MadeWords(); got != "reused from the check of novox/shop#7" {
-		t.Fatalf("said %q", got)
-	}
-	if got := (link.BuildResult{BuiltWhy: "no check built it"}).MadeWords(); got != "built: no check built it" {
-		t.Fatalf("said %q", got)
-	}
-	if got := (link.BuildResult{}).MadeWords(); !strings.Contains(got, "predates ADR 0350") {
-		t.Fatalf("said %q", got)
-	}
-}
-
-// A walk's module the check's build stood in for is registered by the digest the check built — the copy in the
-// module's namespace — and the walk keeps "reused from …" for it; its first-node gate judges that registered
-// build as it judges one the walk built. A scratch reference is refused. Needs the store (MESH_TEST_POSTGRES), and
-// is named in testdata/store-tests.
-
-// A walk's leave names the builds its own pull requests' verdicts made at the head each merge merged — never an
-// earlier head's — read once per walk, and none when they cannot be read: the builder takes nothing a verdict does
-// not name (novox/hq ADR 0350 §2, issue 703).
-func TestAWalksLeaveNamesTheBuildsItsPullRequestsVerdictsMade(t *testing.T) {
-	was := checkedBuildsOf
-	forgetWalkVerdicts()
-	t.Cleanup(func() { checkedBuildsOf = was; forgetWalkVerdicts() })
-	var asked [][]link.PullRef
-	pull := link.PullRef{Owner: "novox", Repo: "shop", Number: 7}
-	atHead := link.CheckedBuild{Pull: pull, Check: "build-2", Head: "bbbbbbbbbbbb", Built: link.CheckBuilt{Module: "app", Key: "r1:2"}}
-	earlier := link.CheckedBuild{Pull: pull, Check: "build-1", Head: "aaaaaaaaaaaa", Built: link.CheckBuilt{Module: "app", Key: "r1:1"}}
-	checkedBuildsOf = func(_ context.Context, pulls []link.PullRef) ([]link.CheckedBuild, error) {
-		asked = append(asked, pulls)
-		return []link.CheckedBuild{atHead, earlier}, nil
-	}
-	pulls := []link.PullRef{pull}
-	heads := map[link.PullRef]string{pull: "bbbbbbbbbbbb0123456789"}
-	for range 3 {
-		if got := reuseWithVerdicts(t.Context(), "plan-1", &link.ReuseAsk{Pulls: pulls}, heads); !reflect.DeepEqual(got.Builds,
-			[]link.CheckedBuild{atHead}) {
-			t.Fatalf("the leave names %+v, not only the merged head's build", got.Builds)
-		}
-	}
-	if !reflect.DeepEqual(asked, [][]link.PullRef{pulls}) {
-		t.Fatalf("the verdicts were read %d times for one walk: %v", len(asked), asked)
-	}
-	// A merge whose head was not said takes nothing.
-	if got := reuseWithVerdicts(t.Context(), "plan-1", &link.ReuseAsk{Pulls: pulls}, nil); got.Builds != nil {
-		t.Fatalf("a merge of no said head names %+v", got.Builds)
-	}
-	checkedBuildsOf = func(context.Context, []link.PullRef) ([]link.CheckedBuild, error) {
-		return nil, errors.New("no bus")
-	}
-	if got := reuseWithVerdicts(t.Context(), "plan-2", &link.ReuseAsk{Pulls: pulls}, heads); got.Builds != nil {
-		t.Fatalf("verdicts that could not be read named %+v", got.Builds)
-	}
-}
-
-// A check is handed only the builds earlier checks of its own pull request at its own head made: another pull
-// request's build, or an earlier head's, is never kept (novox/hq issue 703). None when they cannot be read.
-func TestACheckIsHandedOnlyItsOwnHeadsBuilds(t *testing.T) {
-	was := checkedBuildsOf
-	t.Cleanup(func() { checkedBuildsOf = was })
-	pull := link.PullRef{Owner: "novox", Repo: "shop", Number: 7}
-	mine := link.CheckedBuild{Pull: pull, Check: "build-1", Head: "bbbbbbbbbbbb", Built: link.CheckBuilt{Module: "app", Key: "r1:1"}}
-	earlier := link.CheckedBuild{Pull: pull, Check: "build-0", Head: "aaaaaaaaaaaa", Built: link.CheckBuilt{Module: "app", Key: "r1:1"}}
-	another := link.CheckedBuild{Pull: link.PullRef{Owner: "novox", Repo: "shop", Number: 8}, Check: "build-9",
-		Head: "bbbbbbbbbbbb", Built: link.CheckBuilt{Module: "app", Key: "r1:1"}}
-	var asked [][]link.PullRef
-	checkedBuildsOf = func(_ context.Context, pulls []link.PullRef) ([]link.CheckedBuild, error) {
-		asked = append(asked, pulls)
-		return []link.CheckedBuild{mine, earlier, another}, nil
-	}
-	p := link.PullUpdated{Owner: "novox", Repo: "shop", Number: 7, Commit: "bbbbbbbbbbbb0123456789"}
-	builds := []link.CheckBuild{{Module: "app"}}
-	if got := namedForTheCheck(t.Context(), p, builds); !reflect.DeepEqual(got, []link.CheckedBuild{mine}) ||
-		!reflect.DeepEqual(asked, [][]link.PullRef{{pull}}) {
-		t.Fatalf("the check is handed %+v, read for %v", got, asked)
-	}
-	checkedBuildsOf = func(context.Context, []link.PullRef) ([]link.CheckedBuild, error) {
-		return nil, errors.New("no bus")
-	}
-	if got := namedForTheCheck(t.Context(), p, builds); got != nil {
-		t.Fatalf("verdicts that could not be read named %+v", got)
-	}
-}
-
-func forgetWalkVerdicts() {
-	walkVerdicts.Lock()
-	defer walkVerdicts.Unlock()
-	walkVerdicts.read = map[string]verdictsRead{}
-}
-
-// A walk's merged heads are the forge's word for each merge; a merge announced without its head, or a pull request
-// merged at two heads in one walk, has none, and its walk takes no check's build (novox/hq issue 703).
-func TestAWalksMergedHeadsAreTheForgesWord(t *testing.T) {
-	merge := func(number int, head string) inventory.PlanMerge {
-		return inventory.PlanMerge{Repository: "novox/shop", Number: number, Head: head}
-	}
-	p := &inventory.Plan{Delivery: &inventory.PlanDelivery{Merges: []inventory.PlanMerge{
-		merge(7, "aaaaaaaaaaaa1"), merge(8, ""), merge(9, "bbbbbbbbbbbb"), merge(9, "cccccccccccc")}}}
-	heads := mergedHeadsOf(p)
-	shop := func(n int) link.PullRef { return link.PullRef{Owner: "novox", Repo: "shop", Number: n} }
-	if heads[shop(7)] != "aaaaaaaaaaaa1" || heads[shop(8)] != "" || heads[shop(9)] != "" {
-		t.Fatalf("merged heads %v", heads)
-	}
-}

cmd/mesh-controller/check_here.go

@@ -1,203 +0,0 @@
-package main
-
-import (
-	"context"
-	"errors"
-	"flag"
-	"fmt"
-	"os"
-	"os/exec"
-	"path/filepath"
-	"strings"
-	"time"
-
-	"git.novox.be/novox/mesh-sdk/go/catalogue"
-	"github.com/novox/mesh-controller/internal/builder"
-	"github.com/novox/mesh-controller/internal/link"
-)
-
-// `check-here` is a pull request's merge check run on the machine at hand **exactly as the build seat
-// runs it** (novox/hq issue 286): the same code (builder.Check), the same ask the controller would make of
-// the seat — the gate's modules and judge by the planner's own answer over the facts snapshot, the
-// repositories beside it at the refs the snapshot says the seat clones them at — in the toolchain image
-// the mesh holds, as the user the build seat runs as, against a throwaway store and bus of the versions
-// the mesh runs.
-//
-// **The build seat is the reference.** A merge-check.sh that passed on an agent's machine failed on the
-// seat for three reasons that were each the agent's environment, never the change: a newer Go whose gofmt
-// lays a file out differently, a sibling checkout at the agent's feature branch where the seat had the
-// commit the mesh runs, and a different user. Run here, a check sees what the seat will.
-//
-//	check-here [--tree <checkout>] [--base main] [--registry <artifact store>] [--forge <url of the owner>]
-//	           [--number <n>] [--user uid:gid] [--facts store|<file>] [--keep]
-//
-// The checkout's HEAD is what is checked, and it must be committed: the seat checks a commit, never a
-// working tree.
-func checkHereCommand(ctx context.Context, args []string) error {
-	set := flag.NewFlagSet("check-here", flag.ContinueOnError)
-	tree := set.String("tree", ".", "the change's checkout; its HEAD is checked")
-	base := set.String("base", "main", "the branch the change would merge into")
-	registry := set.String("registry", os.Getenv("MESH_REGISTRY"), "the artifact store holding the facts and the toolchains")
-	forge := set.String("forge", "", "where the repositories beside it are cloned from, as <forge>/<repository>.git; "+
-		"the checkout's origin without its own name when not given")
-	number := set.Int("number", 0, "the pull request's number, when there is one")
-	// The build seat's service runs as root, and its check containers run as the builder does.
-	user := set.String("user", "0:0", "the user the check's containers run as: the build seat's")
-	keep := set.Bool("keep", false, "keep the workspace afterwards")
-	factsFrom := set.String("facts", "store", "the facts snapshot: `store`, the one the artifact store holds — "+
-		"what the seat reads — or a file")
-	if _, err := parseAround(set, args); err != nil {
-		return err
-	}
-	if *registry == "" {
-		return errors.New("check-here reads the facts and the toolchains from the artifact store: --registry <host:port> or MESH_REGISTRY")
-	}
-	dir, err := filepath.Abs(*tree)
-	if err != nil {
-		return err
-	}
-	git := func(args ...string) (string, error) {
-		cmd := exec.CommandContext(ctx, "git", args...)
-		cmd.Dir = dir
-		out, err := cmd.Output()
-		return strings.TrimSpace(string(out)), err
-	}
-	if dirty, err := git("status", "--porcelain", "--untracked-files=no"); err != nil {
-		return fmt.Errorf("%s is not a checkout: %w", dir, err)
-	} else if dirty != "" {
-		return errors.New("the checkout has changes not committed: the build seat checks a commit, so commit first")
-	}
-	head, err := git("rev-parse", "HEAD")
-	if err != nil {
-		return err
-	}
-	origin, err := git("remote", "get-url", "origin")
-	if err != nil {
-		return fmt.Errorf("the checkout has no origin to say which repository it is: %w", err)
-	}
-	owner, repo, prefix := ownerRepoOf(origin)
-	if *forge == "" {
-		*forge = prefix
-	}
-	if _, err := git("fetch", "--quiet", "origin", *base); err != nil {
-		return fmt.Errorf("cannot fetch %s to say what the change touches: %w", *base, err)
-	}
-	// Without rename detection, so a file moved out of a build source is said under its old name as well:
-	// its going is a change to the build that held it (novox/hq ADR 0267).
-	changedText, err := git("diff", "--name-only", "--no-renames", "origin/"+*base+"...HEAD")
-	if err != nil {
-		return err
-	}
-	var paths, removed []string
-	for _, p := range strings.Split(changedText, "\n") {
-		if p = strings.TrimSpace(p); p == "" {
-			continue
-		}
-		paths = append(paths, p)
-		if _, err := os.Stat(filepath.Join(dir, p)); os.IsNotExist(err) {
-			removed = append(removed, p)
-		}
-	}
-
-	_ = os.Setenv("MESH_REGISTRY", *registry)
-	f, err := readFacts(ctx, *factsFrom)
-	if err != nil {
-		return fmt.Errorf("the facts snapshot cannot be read: %w", err)
-	}
-	entries, read, edges, err := graphOfFacts(f)
-	if err != nil {
-		return err
-	}
-	p := link.PullUpdated{Owner: owner, Repo: repo, Number: *number, Base: *base, Commit: head, Paths: paths,
-		Removed: removed, ModuleDirs: moduleDirsIn(dir, paths), ModuleDirsSaid: true}
-	scope := pullScope(p, entries, read, edges)
-	_, scriptErr := os.Stat(filepath.Join(dir, builder.CheckScript))
-	if !scope.gated() && !scope.Mesh {
-		fmt.Printf("%s: %s, and the repository is not the mesh's: the build seat runs nothing for it\n",
-			owner+"/"+repo, noModuleTouched)
-		return nil
-	}
-	if !scope.gated() && scriptErr != nil {
-		fmt.Printf("%s: %s; %s\n", owner+"/"+repo, noModuleTouched, noMergeCheck)
-		return nil
-	}
-
-	toolchains := map[string]string{}
-	for language, reference := range f.Versions.Toolchains {
-		toolchains[language] = catalogue.Rerouted(reference, *registry)
-	}
-	if len(toolchains) == 0 {
-		return errors.New("the facts snapshot names no toolchain: it was taken by a controller from before " +
-			"issue 286, and the seat's toolchain cannot be known here")
-	}
-	beside := map[string]builder.Beside{}
-	for d, ref := range f.Beside {
-		from := d
-		if d == "mesh-controller-main" {
-			from = "mesh-controller"
-		}
-		beside[d] = builder.Beside{Repository: strings.TrimSuffix(*forge, "/") + "/" + from + ".git", Ref: ref}
-	}
-	id := fmt.Sprintf("check-here-%d", time.Now().UnixNano())
-	spec := builder.CheckSpec{ID: id, Repository: dir, Ref: head, Owner: owner, Repo: repo, Number: *number,
-		Paths: paths, Beside: beside, Modules: scope.Modules, New: scope.New, Manifests: scope.Manifests,
-		Base: *base, Judge: scope.Judge, Toolchain: toolchains["go"], Toolchains: toolchains, User: *user}
-
-	workspace, err := os.MkdirTemp("", "mesh-check-here-")
-	if err != nil {
-		return err
-	}
-	if !*keep {
-		defer removeWorkspace(spec.Toolchain, workspace, *user)
-	}
-	fmt.Fprintf(os.Stderr, "checking %s/%s at %.8s as the build seat would, against the facts of %s, in %s\n",
-		owner, repo, head, f.Taken.Format(time.RFC3339), workspace)
-	v, err := builder.Check(ctx, builder.Command, spec, workspace, *registry, builder.GitCredential{},
-		func(step, message string) {
-			if step != "output" {
-				fmt.Fprintf(os.Stderr, "  [%s] %s\n", step, message)
-			}
-		})
-	if err != nil {
-		return fmt.Errorf("the check could not run — on the seat an error, never a pass: %w", err)
-	}
-	fmt.Println(v.Report)
-	fmt.Println()
-	fmt.Printf("mesh/merge-gate: %s — %s\n", strings.ToUpper(v.Gate.Verdict), v.Gate.Summary)
-	if v.Repo != nil {
-		fmt.Printf("mesh/repo-check: %s — %s\n", strings.ToUpper(v.Repo.Verdict), v.Repo.Summary)
-	}
-	for _, l := range []*builder.Layer{v.Gate, v.Repo} {
-		if l != nil && l.Verdict != "pass" && l.Verdict != "warning" {
-			return errors.New("the build seat would not pass this change")
-		}
-	}
-	return nil
-}
-
-// ownerRepoOf reads owner, repository and the owner's URL from a remote: ssh://git@host:222/novox/mesh-host.git
-// → novox, mesh-host, ssh://git@host:222/novox.
-func ownerRepoOf(remote string) (string, string, string) {
-	trimmed := strings.TrimSuffix(strings.TrimSuffix(remote, "/"), ".git")
-	cut := strings.LastIndexAny(trimmed, "/:")
-	if cut < 0 {
-		return "", trimmed, ""
-	}
-	repo, prefix := trimmed[cut+1:], trimmed[:cut]
-	owner := prefix
-	if at := strings.LastIndexAny(prefix, "/:"); at >= 0 {
-		owner = prefix[at+1:]
-	}
-	return owner, repo, prefix
-}
-
-// removeWorkspace removes what the check left, written as the seat's user: by a container of that user
-// when it is not this one.
-func removeWorkspace(image, workspace, user string) {
-	if image != "" && user != fmt.Sprintf("%d:%d", os.Getuid(), os.Getgid()) {
-		// Everything in it — the check's HOME is the workspace, so the toolchain's own files are there too.
-		_ = exec.Command("docker", "run", "--rm", "--user", user, "--volume", workspace+":/workspace", image,
-			"sh", "-c", "rm -rf /workspace/* /workspace/.[!.]*").Run()
-	}
-	_ = os.RemoveAll(workspace)
-}

cmd/mesh-controller/check_pulls_test.go

@@ -1,44 +0,0 @@
-package main
-
-import (
-	"reflect"
-	"testing"
-
-	"github.com/novox/mesh-controller/internal/inventory"
-	"github.com/novox/mesh-controller/internal/link"
-)
-
-// 1212/AC1 and AC2: the check request names the pulls bucket of each module claiming the delivery seat, in the order
-// of the claimants' names.
-func TestACheckNamesThePullsBucketsOfTheSeatsClaimants(t *testing.T) {
-	for name, c := range map[string]struct {
-		entries []inventory.Entry
-		want    []string
-	}{
-		"only the gate":    {[]inventory.Entry{claimingTheSeat("mesh-delivery-gate"), namedOnly("mesh-delivery")}, []string{"mesh-delivery-gate_pulls"}},
-		"only today's":     {[]inventory.Entry{claimingTheSeat("mesh-delivery"), namedOnly("gitea")}, []string{"mesh-delivery_pulls"}},
-		"both, name order": {[]inventory.Entry{claimingTheSeat("mesh-delivery-gate"), claimingTheSeat("mesh-delivery")}, []string{"mesh-delivery_pulls", "mesh-delivery-gate_pulls"}},
-		"none":             {[]inventory.Entry{namedOnly("gitea")}, nil},
-	} {
-		if got := pullsBucketsOf(c.entries); !reflect.DeepEqual(got, c.want) {
-			t.Errorf("%s: %v, want %v", name, got, c.want)
-		}
-	}
-}
-
-// 1212/AC1 and AC2: the check a request carries names those buckets (the wiring, not only the helper).
-func TestTheCheckRequestCarriesThePullsBuckets(t *testing.T) {
-	for name, c := range map[string]struct {
-		entries []inventory.Entry
-		want    []string
-	}{
-		"only the gate":    {[]inventory.Entry{claimingTheSeat("mesh-delivery-gate")}, []string{"mesh-delivery-gate_pulls"}},
-		"only today's":     {[]inventory.Entry{claimingTheSeat("mesh-delivery")}, []string{"mesh-delivery_pulls"}},
-		"both, name order": {[]inventory.Entry{claimingTheSeat("mesh-delivery-gate"), claimingTheSeat("mesh-delivery")}, []string{"mesh-delivery_pulls", "mesh-delivery-gate_pulls"}},
-	} {
-		got := checkOf(link.PullUpdated{Owner: "novox", Repo: "a", Number: 7}, checkScope{}, c.entries, nil, nil, nil, nil)
-		if !reflect.DeepEqual(got.Pulls, c.want) || got.Owner != "novox" || got.Number != 7 {
-			t.Errorf("%s: %+v, want pulls %v", name, got, c.want)
-		}
-	}
-}

cmd/mesh-controller/check_siblings.go

@@ -1,165 +0,0 @@
-package main
-
-import (
-	"context"
-	"fmt"
-	"regexp"
-	"sort"
-	"strings"
-
-	"github.com/novox/mesh-controller/internal/inventory"
-	"github.com/novox/mesh-controller/internal/link"
-)
-
-// **A delivery group's member is checked beside the other members' heads** (novox/hq ADR 0382, issue 867).
-//
-// A mesh-host change and a mesh-controller change that need each other could not both pass their own merge checks:
-// each was read beside the other's repository at the commit the mesh runs, which holds neither change. So the
-// controller asks mesh-delivery's `groups` once for every pull request's check it asks (§1), and names, in the ask,
-// the group's other open pull requests into a base of the same name, in a repository the build seat reads beside the
-// check — mesh-lab never — each with its whole head. The build seat reads those repositories at the sibling's merge (§2).
-// A pull request for which mesh-delivery answered and named no sibling is asked exactly as before (§7).
-
-// wholeCommit is a commit as the forge says a head: forty hexadecimal characters.
-var wholeCommit = regexp.MustCompile(`^[0-9a-f]{40}$`)
-
-// besideRepositories are the repositories (lower case, owner/repo) a check reads beside its own, by the directory each
-// is found under — the core's, as besideOf clones them, and mesh-sdk beside the controller; never mesh-lab, which is
-// always read at its trunk.
-func besideRepositories(entries []inventory.Entry) map[string]string {
-	read := map[string]string{}
-	for _, e := range entries {
-		dir, core := coreModules[e.Manifest.Module]
-		if !core || e.Provided || e.Source.Repository == "" {
-			continue
-		}
-		read[nameOf(e.Source.Repository)] = dir
-		if dir == "mesh-controller" && e.Source.Seat != "" {
-			read[nameOf(siblingOf(e.Source.Repository, "mesh-sdk"))] = "mesh-sdk"
-		}
-	}
-	delete(read, "")
-	return read
-}
-
-// nameOf is a recorded repository as owner/repo in lower case, empty when it names no owner.
-func nameOf(repository string) string {
-	owner, repo := sourceOwner(repository), sourceName(repository)
-	if owner == "" || repo == "" {
-		return ""
-	}
-	return strings.ToLower(owner + "/" + repo)
-}
-
-// siblingsFor is the pull request's siblings, as mesh-delivery's groups say them (ADR 0382 §1): the other members of
-// the group its head branch names that are open, unmerged and into a base of its own base's name, in a repository the
-// check reads beside it (beside: the directories the ask already names). The second answer is why they could not be
-// learned, empty when they could: the group's members carry no head or base — a mesh-delivery from before the rule.
-func siblingsFor(p link.PullUpdated, entries []inventory.Entry, beside map[string]link.CheckedOut,
-	lines []groupsLine) ([]link.CheckSibling, string) {
-	own := strings.ToLower(p.Owner + "/" + p.Repo)
-	var group *groupsLine
-	if p.Head == "" {
-		// A recheck (mesh-delivery's `recheck` through `delivery check`) carries no head branch name: the group is the one
-		// whose members hold this very pull request, by repository and number.
-		learnable := false
-		for i := range lines {
-			for _, m := range lines[i].Details {
-				learnable = true
-				if p.Number != 0 && m.Number == p.Number && strings.ToLower(m.Repository) == own {
-					group = &lines[i]
-				}
-			}
-		}
-		if group == nil {
-			for _, l := range lines {
-				if len(l.Details) == 0 && len(l.Members) > 0 && !learnable {
-					return nil, "mesh-delivery named the groups' members without their pull requests (a mesh-delivery from before novox/hq ADR 0382): " +
-						"the group of a pull request announced without its head branch cannot be found"
-				}
-			}
-			return nil, "" // a lone pull request
-		}
-	} else {
-		for i := range lines {
-			if lines[i].ID == p.Head {
-				group = &lines[i]
-			}
-		}
-		if group == nil {
-			return nil, ""
-		}
-	}
-	if len(group.Details) == 0 && len(group.Members) > 0 {
-		return nil, "mesh-delivery named the group's members without their heads and bases (a mesh-delivery from before novox/hq ADR 0382)"
-	}
-	read := besideRepositories(entries)
-	var siblings []link.CheckSibling
-	for _, m := range group.Details {
-		repository := strings.ToLower(m.Repository)
-		if repository == own {
-			continue
-		}
-		if !m.Open {
-			continue
-		}
-		if m.Head == "" || m.Base == "" {
-			return nil, "mesh-delivery named " + m.ID + " without its head or base (a mesh-delivery from before novox/hq ADR 0382)"
-		}
-		dir, readBeside := read[repository]
-		if m.Base != p.Base || !readBeside || dir == "mesh-lab" {
-			continue
-		}
-		if _, there := beside[dir]; !there {
-			continue
-		}
-		head := strings.ToLower(m.Head)
-		if !wholeCommit.MatchString(head) {
-			return nil, fmt.Sprintf("mesh-delivery named %s with a head that is not a whole commit (%q)", m.ID, m.Head)
-		}
-		siblings = append(siblings, link.CheckSibling{Repository: m.Repository, Number: m.Number, Head: head, Base: m.Base, Dir: dir})
-	}
-	sort.Slice(siblings, func(i, j int) bool { return siblings[i].Dir < siblings[j].Dir })
-	return siblings, ""
-}
-
-// withSiblings asks mesh-delivery's `groups` once and says in the request the pull request's siblings, or why they
-// could not be learned (ADR 0382 §1): a check never waits on mesh-delivery past groupAskWithin and never fails for it,
-// so a fix to mesh-delivery is still checked without it.
-func withSiblings(ctx context.Context, request *link.BuildRequest, p link.PullUpdated, entries []inventory.Entry) {
-	lines, err := groupsAsked(ctx, deliverySeatHeld(entries))
-	siblingsFrom(request, p, entries, lines, err)
-}
-
-// siblingsFrom is withSiblings from mesh-delivery's answer already had.
-func siblingsFrom(request *link.BuildRequest, p link.PullUpdated, entries []inventory.Entry, lines []groupsLine, err error) {
-	if request.Check == nil {
-		return
-	}
-	if err != nil {
-		request.Check.SiblingsUnknown = fmt.Sprintf("mesh-delivery did not say the group's pull requests (%v): "+
-			"the check reads no siblings", err)
-		return
-	}
-	request.Check.Siblings, request.Check.SiblingsUnknown = siblingsFor(p, entries, request.Check.Beside, lines)
-}
-
-// composedMember says the pull request is a member of a delivery group whose gate is the composed check's (novox/hq
-// ADR 0403 clauses 1 and 7): the group has two members or more and mesh-delivery says so on its line. The group is
-// found as siblingsFor finds it, by its head branch name, or, for a recheck that carries none, by the pull request's
-// repository and number — not by siblings, which name only what the check reads beside it.
-func composedMember(p link.PullUpdated, lines []groupsLine) bool {
-	own := strings.ToLower(p.Owner + "/" + p.Repo)
-	for _, l := range lines {
-		found := p.Head != "" && l.ID == p.Head
-		for _, m := range l.Details {
-			if p.Head == "" && p.Number != 0 && m.Number == p.Number && strings.ToLower(m.Repository) == own {
-				found = true
-			}
-		}
-		if found {
-			return l.ComposedGate && max(len(l.Details), len(l.Members)) >= 2
-		}
-	}
-	return false
-}

cmd/mesh-controller/check_siblings_test.go

@@ -1,248 +0,0 @@
-package main
-
-import (
-	"context"
-	"encoding/json"
-	"errors"
-	"strings"
-	"testing"
-
-	"git.novox.be/novox/mesh-sdk/go/catalogue"
-	"github.com/novox/mesh-controller/internal/inventory"
-	"github.com/novox/mesh-controller/internal/link"
-)
-
-// **A delivery group's member is checked beside the other members' heads** (novox/hq ADR 0382 §1, §7, issue 867): the
-// controller asks mesh-delivery's `groups` once for every check it asks, and names in the ask the group's other open
-// pull requests into a base of the same name, in a repository the build seat reads beside it — mesh-lab never.
-
-const (
-	headHost       = "1111111111111111111111111111111111111111"
-	headController = "2222222222222222222222222222222222222222"
-	headSDK        = "3333333333333333333333333333333333333333"
-	headLab        = "4444444444444444444444444444444444444444"
-	headHq         = "5555555555555555555555555555555555555555"
-)
-
-func theCoreOnTheGitSeat() []inventory.Entry {
-	onSeat := func(module, repository string) inventory.Entry {
-		e := fromRepo(module, repository, "")
-		e.Source.Seat = "git"
-		return e
-	}
-	nats := onSeat("nats", "novox/mesh-catalog")
-	nats.Source.Path = "modules/nats"
-	held := catalogue.Manifest{Module: "mesh-delivery", Claims: []catalogue.Claim{{Name: catalogue.DeliverySeat, Scope: catalogue.ScopeMesh}}}
-	return []inventory.Entry{onSeat("mesh-controller", "novox/mesh-controller"), onSeat("mesh-host", "novox/mesh-host"),
-		onSeat("node-tools", "novox/mesh-tools"), nats, {Manifest: held, On: []string{"anchor"}}}
-}
-
-func besideTheCore() map[string]link.CheckedOut {
-	return map[string]link.CheckedOut{"mesh-controller": {Repository: "c"}, "mesh-host": {Repository: "h"},
-		"mesh-tools": {Repository: "t"}, "mesh-catalog": {Repository: "k"}, "mesh-sdk": {Repository: "s"}, "mesh-lab": {Repository: "l"}}
-}
-
-func member(repository string, number int, head, base string, open bool) memberLine {
-	return memberLine{ID: repository + "@" + head[:12], Repository: repository, State: "checked", Number: number, Head: head,
-		Base: base, Open: open}
-}
-
-func group(id string, members ...memberLine) groupsLine {
-	line := groupsLine{ID: id, Details: members}
-	for _, m := range members {
-		line.Members = append(line.Members, m.ID+" ("+m.State+")")
-	}
-	return line
-}
-
-func TestASiblingIsTheGroupsOtherOpenPullRequestIntoABaseOfTheSameName(t *testing.T) {
-	entries := theCoreOnTheGitSeat()
-	pull := link.PullUpdated{Owner: "novox", Repo: "mesh-host", Number: 114, Base: "main", Head: "feat/x", Commit: headHost}
-	for _, c := range []struct {
-		what    string
-		lines   []groupsLine
-		want    []string
-		unknown string
-	}{
-		{"the other member, open, same base", []groupsLine{group("feat/x",
-			member("novox/mesh-host", 114, headHost, "main", true), member("novox/mesh-controller", 346, headController, "main", true))},
-			[]string{"mesh-controller=novox/mesh-controller#346@" + headController + " onto main"}, ""},
-		{"a member into a base of another name is not one", []groupsLine{group("feat/x",
-			member("novox/mesh-host", 114, headHost, "main", true), member("novox/mesh-controller", 346, headController, "release", true))},
-			nil, ""},
-		{"a member not open (merged or closed) is not one", []groupsLine{group("feat/x",
-			member("novox/mesh-host", 114, headHost, "main", true), member("novox/mesh-controller", 346, headController, "main", false))},
-			nil, ""},
-		{"mesh-lab is never one", []groupsLine{group("feat/x",
-			member("novox/mesh-host", 114, headHost, "main", true), member("novox/mesh-lab", 5, headLab, "main", true))},
-			nil, ""},
-		{"a repository the check reads nothing of is not one", []groupsLine{group("feat/x",
-			member("novox/mesh-host", 114, headHost, "main", true), member("novox/hq", 9, headHq, "main", true))},
-			nil, ""},
-		{"mesh-sdk, read beside the controller, is one", []groupsLine{group("feat/x",
-			member("novox/mesh-host", 114, headHost, "main", true), member("novox/mesh-sdk", 7, headSDK, "main", true))},
-			[]string{"mesh-sdk=novox/mesh-sdk#7@" + headSDK + " onto main"}, ""},
-		{"another group is none of its business", []groupsLine{group("feat/y",
-			member("novox/mesh-host", 114, headHost, "main", true), member("novox/mesh-controller", 346, headController, "main", true))},
-			nil, ""},
-		{"a group of its own alone has none", []groupsLine{group("feat/x", member("novox/mesh-host", 114, headHost, "main", true))},
-			nil, ""},
-		{"an older mesh-delivery names no heads", []groupsLine{{ID: "feat/x",
-			Members: []string{"novox/mesh-host@111111111111 (checked)", "novox/mesh-controller@222222222222 (checked)"}}},
-			nil, "without their heads and bases"},
-		{"a member without its base", []groupsLine{group("feat/x",
-			member("novox/mesh-host", 114, headHost, "main", true), member("novox/mesh-controller", 346, headController, "", true))},
-			nil, "without its head or base"},
-		{"a head that is no commit", []groupsLine{group("feat/x",
-			member("novox/mesh-host", 114, headHost, "main", true), member("novox/mesh-controller", 346, headController[:12]+"zzzzzzzzzzzzzzzzzzzzzzzzzzzz", "main", true))},
-			nil, "not a whole commit"},
-	} {
-		got, unknown := siblingsFor(pull, entries, besideTheCore(), c.lines)
-		var said []string
-		for _, s := range got {
-			said = append(said, s.Dir+"="+s.Repository+"#"+itoa(s.Number)+"@"+s.Head+" onto "+s.Base)
-		}
-		if strings.Join(said, ";") != strings.Join(c.want, ";") {
-			t.Errorf("%s: siblings %v, wanted %v", c.what, said, c.want)
-		}
-		if (c.unknown == "") != (unknown == "") || !strings.Contains(unknown, c.unknown) {
-			t.Errorf("%s: could not learn %q, wanted %q", c.what, unknown, c.unknown)
-		}
-	}
-	// A pull request into a release branch has siblings into the release branch of the same name (ADR 0358 §1).
-	release := pull
-	release.Base = "feat/57"
-	lines := []groupsLine{group("feat/x", member("novox/mesh-host", 114, headHost, "feat/57", true),
-		member("novox/mesh-controller", 346, headController, "feat/57", true), member("novox/mesh-tools", 8, headLab, "main", true))}
-	if got, _ := siblingsFor(release, entries, besideTheCore(), lines); len(got) != 1 || got[0].Dir != "mesh-controller" {
-		t.Errorf("into a release branch: %+v", got)
-	}
-	// A recheck announces the pull request without its head branch: its group is the one holding it (repository, number).
-	pull.Head = ""
-	got, unknown := siblingsFor(pull, entries, besideTheCore(), lines)
-	if len(got) != 1 || got[0].Dir != "mesh-tools" || unknown != "" {
-		t.Errorf("a recheck of a group member: %+v %q", got, unknown)
-	}
-	// A pull request in no group, rechecked, is alone: no sibling, and nothing said.
-	pull.Number = 999
-	if got, unknown := siblingsFor(pull, entries, besideTheCore(), lines); got != nil || unknown != "" {
-		t.Errorf("a lone pull request: %+v %q", got, unknown)
-	}
-	if got, unknown := siblingsFor(pull, entries, besideTheCore(), nil); got != nil || unknown != "" {
-		t.Errorf("no groups at all: %+v %q", got, unknown)
-	}
-	// A mesh-delivery that names members without their pull requests cannot find the group of a recheck: it says so.
-	older := []groupsLine{{ID: "feat/x", Members: []string{"novox/mesh-host@111111111111 (checked)"}}}
-	pull.Number = 114
-	if got, unknown := siblingsFor(pull, entries, besideTheCore(), older); got != nil || unknown == "" {
-		t.Errorf("an older mesh-delivery: %+v %q", got, unknown)
-	}
-}
-
-func itoa(n int) string { b, _ := json.Marshal(n); return string(b) }
-
-// Every check asks mesh-delivery's `groups` once; the ask names the sibling's repository, head and base.
-func TestEveryCheckAsksMeshDeliveryOnceAndNamesItsSiblings(t *testing.T) {
-	entries := theCoreOnTheGitSeat()
-	asked := 0
-	was := groupsAsked
-	t.Cleanup(func() { groupsAsked = was })
-	groupsAsked = func(_ context.Context, held bool) ([]groupsLine, error) {
-		asked++
-		if !held {
-			t.Error("the seat is held, yet it was asked as not held")
-		}
-		return []groupsLine{group("feat/x", member("novox/mesh-host", 114, headHost, "main", true),
-			member("novox/mesh-controller", 346, headController, "main", true))}, nil
-	}
-	request := link.BuildRequest{Check: &link.CheckRequest{Owner: "novox", Repo: "mesh-host", Base: "main", Beside: besideTheCore()}}
-	withSiblings(t.Context(), &request, link.PullUpdated{Owner: "novox", Repo: "mesh-host", Base: "main", Head: "feat/x"}, entries)
-	if asked != 1 {
-		t.Fatalf("mesh-delivery was asked %d times for one check", asked)
-	}
-	want := link.CheckSibling{Repository: "novox/mesh-controller", Number: 346, Head: headController, Base: "main", Dir: "mesh-controller"}
-	if got := request.Check.Siblings; len(got) != 1 || got[0] != want || request.Check.SiblingsUnknown != "" {
-		t.Fatalf("the ask names siblings %+v, unknown %q", got, request.Check.SiblingsUnknown)
-	}
-	body, _ := json.Marshal(request.Check)
-	if !strings.Contains(string(body), `"siblings":[{"repository":"novox/mesh-controller","number":346,"head":"`+headController+
-		`","base":"main","dir":"mesh-controller"}]`) {
-		t.Fatalf("on the wire: %s", body)
-	}
-}
-
-// When mesh-delivery does not answer in time (or is not held, or answered without the fields), the check reads no
-// sibling and its request says it could not learn them, so a fix to mesh-delivery is still checked without it.
-func TestWhenMeshDeliveryDoesNotAnswerTheCheckReadsNoSiblingAndSaysSo(t *testing.T) {
-	was := groupsAsked
-	t.Cleanup(func() { groupsAsked = was })
-	for _, c := range []struct {
-		what string
-		err  error
-		held bool
-	}{{"it did not answer", context.DeadlineExceeded, true}, {"nothing serves it", errors.New("nothing serves mesh-delivery.groups"), true},
-		{"no holder on record", errors.New("no holder of mesh-delivery is on record to say it"), false}} {
-		entries := theCoreOnTheGitSeat()
-		if !c.held {
-			entries = entries[:4]
-		}
-		groupsAsked = func(_ context.Context, held bool) ([]groupsLine, error) {
-			if held != c.held {
-				t.Errorf("%s: held %v", c.what, held)
-			}
-			return nil, c.err
-		}
-		request := link.BuildRequest{Check: &link.CheckRequest{Owner: "novox", Repo: "mesh-host", Base: "main", Beside: besideTheCore()}}
-		withSiblings(t.Context(), &request, link.PullUpdated{Owner: "novox", Repo: "mesh-host", Base: "main", Head: "feat/x"}, entries)
-		if len(request.Check.Siblings) != 0 || !strings.Contains(request.Check.SiblingsUnknown, c.err.Error()) ||
-			!strings.Contains(request.Check.SiblingsUnknown, "reads no siblings") {
-			t.Errorf("%s: siblings %+v, unknown %q", c.what, request.Check.Siblings, request.Check.SiblingsUnknown)
-		}
-	}
-}
-
-// **A pull request for which mesh-delivery answered and named no sibling is asked exactly as before** (ADR 0382 §7):
-// byte for byte the request it was without the rule.
-func TestAPullRequestWithNoSiblingIsAskedByteForByteAsBefore(t *testing.T) {
-	entries := theCoreOnTheGitSeat()
-	was := groupsAsked
-	t.Cleanup(func() { groupsAsked = was })
-	for _, answer := range [][]groupsLine{nil, {group("feat/other", member("novox/mesh-controller", 346, headController, "main", true))},
-		{group("feat/x", member("novox/mesh-host", 114, headHost, "main", true), member("novox/hq", 3, headHq, "main", true))}} {
-		groupsAsked = func(context.Context, bool) ([]groupsLine, error) { return answer, nil }
-		build := func() link.BuildRequest {
-			return link.BuildRequest{ID: "build-1", Repository: "r", Ref: headHost, Check: &link.CheckRequest{Owner: "novox",
-				Repo: "mesh-host", Number: 114, Base: "main", Beside: besideTheCore(), Modules: []string{"mesh-host"}, Judge: "validator"}}
-		}
-		before, _ := json.Marshal(build())
-		after := build()
-		withSiblings(t.Context(), &after, link.PullUpdated{Owner: "novox", Repo: "mesh-host", Base: "main", Head: "feat/x"}, entries)
-		got, _ := json.Marshal(after)
-		if string(before) != string(got) {
-			t.Fatalf("the request changed:\nbefore %s\nafter  %s", before, got)
-		}
-	}
-}
-
-// What the build seat's verdict says of its siblings reaches the forge's holder in the controller's `checked`.
-func TestTheVerdictCarriesTheSiblingsAndWhereTheJudgeCameFrom(t *testing.T) {
-	read := []link.CheckSibling{{Repository: "novox/mesh-controller", Number: 346, Head: headController, Base: "main", BaseCommit: headHost}}
-	c := checkedOf(link.BuildResult{ID: "b", Ref: headHost, Checked: &link.CheckRequest{Owner: "novox", Repo: "mesh-host", Number: 114},
-		Check: &link.CheckOutcome{Verdict: "pass", Summary: "ok", Siblings: read, JudgeFrom: "sibling novox/mesh-controller#346 merge abc",
-			Validator: "the change's own validator"}})
-	if len(c.Siblings) != 1 || c.Siblings[0] != read[0] || c.JudgeFrom == "" || c.Validator == "" {
-		t.Fatalf("the verdict says %+v", c)
-	}
-	body, _ := json.Marshal(c)
-	for _, want := range []string{`"siblings":[{"repository":"novox/mesh-controller","number":346,"head":"` + headController +
-		`","base":"main","base_commit":"` + headHost + `"}]`, `"judge_from":"sibling novox/mesh-controller#346 merge abc"`} {
-		if !strings.Contains(string(body), want) {
-			t.Fatalf("the verdict lacks %s:\n%s", want, body)
-		}
-	}
-	unknown := checkedOf(link.BuildResult{ID: "b", Check: &link.CheckOutcome{Verdict: "pass", SiblingsUnknown: "mesh-delivery did not answer"}})
-	if body, _ := json.Marshal(unknown); !strings.Contains(string(body), `"siblings_unknown":"mesh-delivery did not answer"`) ||
-		strings.Contains(string(body), `"siblings":`) {
-		t.Fatalf("the verdict that could not learn them says %s", body)
-	}
-}

cmd/mesh-controller/checks.go

@@ -2,8 +2,6 @@ package main
 
 import (
 	"context"
-	"encoding/json"
-	"fmt"
 	"io"
 	"os"
 	"path"
@@ -12,46 +10,18 @@ import (
 	"slices"
 	"sort"
 	"strings"
-	"time"
 
-	"git.novox.be/novox/mesh-sdk/go/catalogue"
-	"github.com/novox/mesh-controller/internal/broker"
 	"github.com/novox/mesh-controller/internal/inventory"
 	"github.com/novox/mesh-controller/internal/link"
 )
 
-// A pull request's merge check (novox/hq to-be 45 §9, ADR 0237 as amended 2026-10-06): the forge
-// announces every pull request's new head, the controller decides what is checked, asks the build seat to
-// check it, and says the verdict as `checked`, which the forge's holder sets as the pull request's
-// statuses. **Before merge, never after**: every check the mesh had ran after a merge, on a machine.
-//
-// **The mesh's module graph decides, not the repository.** The controller holds the graph — every module,
-// the repository and directory it is built from — and maps the pull request's changed paths onto it by
-// the planner's own answer (reachOfMerge, touchedBy — the one place a changed file is mapped onto modules,
-// for the merge handler, the release planner, the merge gate and this check; issue 280): **a changed file
-// touches exactly the modules whose build reads it** — a module's own directory (the whole repository for
-// one built from its root), or a repository its recipe packages. A file no build reads — a script at the
-// root, a README — touches no module. A directory the change adds a module.json in, which the graph does
-// not hold yet (said by the head, issue 278), is a new module and is checked too.
-//
-//   - touches a module: the build seat runs **the gate** — `mesh/merge-gate`, the touched manifests, every
-//     machine composed with the change, the replays — and the repository's own merge-check.sh beside it;
-//   - touches none, in a repository that is the mesh's (it sources a module on some branch, or shares the
-//     core's owner): the gate is a pass that says so — a fact, not a missing check — and the repository's
-//     own merge-check.sh runs as `mesh/repo-check`, a warning when it has none;
-//   - touches none, anywhere else: the gate is a pass that says so, and nothing more is said.
-//
-// What is checked is decided here and run there (internal/builder/check.go).
-
-// checkTimeout is how long one check may run on the build seat. Said here so the ask's watchdog (S6)
-// and the builder agree on what late means.
-const checkTimeout = 45 * time.Minute
-
-// noModuleTouched is the gate's word for a change that touches nothing of the graph.
-const noModuleTouched = "the change touches no module of the mesh's graph"
-
-// noMergeCheck is the repository layer's word for a repository of the mesh with no merge-check.sh.
-const noMergeCheck = "the repository declares no merge-check.sh: none of its own tests run before it merges"
+// What a pull request reaches of the mesh's graph (novox/hq to-be 45 §9, issue 280). The controller no longer checks a
+// pull request or says a verdict on it (R4g, ADR 0503 §3, ADR 0501 §5): the checker judges the heads, and mesh-delivery
+// asks the operator's Approve on its verdict. What stays here is the mapping of a pull request's changed paths onto the
+// mesh's module graph by the planner's own answer (reachOfMerge, touchedBy), which the delivery verbs (`delivery order`,
+// the change plan) and the head's declared config (tellPullDeclares) read: **a changed file touches exactly the modules
+// whose build reads it** — a module's own directory (the whole repository for one built from its root), or a repository
+// its recipe packages — and a directory the change adds a module.json in is a new module.
 
 // coreModules are the modules whose repositories are the mesh's core, by the directory a check finds
 // each beside it — and whose owner is the mesh's own.
@@ -75,8 +45,6 @@ type checkScope struct {
 	// Mesh says the repository is the mesh's: modules are built from it on some branch, its owner is the
 	// core's, or the change adds a module to it.
 	Mesh bool
-	// Judge is who judges the gate (link.JudgeSelf, or the running controller).
-	Judge string
 	// From is a module built from the repository, for how the mesh clones it; nil when none is.
 	From *inventory.Entry
 	// Reach is the planner's whole answer, which the change plan is made from.
@@ -98,10 +66,6 @@ func pullScope(p link.PullUpdated, entries []inventory.Entry, read map[string][]
 		Width: len(r.Plan.Modules), Tiers: len(r.Plan.Tiers), Reach: r}
 	for _, e := range append(append([]inventory.Entry{}, r.Touched...), r.Deleted...) {
 		s.Manifests = append(s.Manifests, path.Join(strings.Trim(e.Source.Path, "/"), moduleManifestFile))
-		switch e.Manifest.Module {
-		case "mesh-controller":
-			s.Judge = link.JudgeSelf
-		}
 	}
 	for _, d := range r.Added {
 		s.Manifests = append(s.Manifests, path.Join(d, moduleManifestFile))
@@ -137,315 +101,37 @@ func sourceOwner(repository string) string {
 	return strings.ToLower(parts[len(parts)-2])
 }
 
-// PullUpdated decides a pull request's merge check, and asks for it when there is something to run.
+// PullUpdated hears a pull request's new head. It asks no check and says no verdict (pullUpdated).
 func (f following) PullUpdated(ctx context.Context, p link.PullUpdated) error {
-	_, err := f.pullUpdated(ctx, p, os.Stdout)
-	return err
+	return f.pullUpdated(ctx, p, os.Stdout)
 }
 
-// pullUpdated is PullUpdated saying what it did to w. It returns the id of the check it asked of the build seat, or
-// "" when it said a verdict itself and asked nothing. A command that answers JSON on standard output (`delivery
-// check`) gives it standard error, so its output stays the document alone (novox/hq issue 1311).
-func (f following) pullUpdated(ctx context.Context, p link.PullUpdated, w io.Writer) (string, error) {
+// pullUpdated is PullUpdated saying what it did to w. It asks nothing of anybody and says no verdict (R4g; ADR 0503 §3, §5,
+// ADR 0527): the checker judges every repository whose trunk requires `mesh/check`, hq included. All it still does is tell
+// mesh-config what the head declares (ADR 0502), whatever judges it.
+func (f following) pullUpdated(ctx context.Context, p link.PullUpdated, w io.Writer) error {
 	inv := f.open.inventory
 	entries, err := inv.Catalogued(ctx)
 	if err != nil {
-		return "", err
+		return err
 	}
 	read, err := readForPlanning(ctx, inv)
 	if err != nil {
-		return "", err
+		return err
 	}
 	edges, err := inv.Dependencies(ctx)
 	if err != nil {
-		return "", err
+		return err
 	}
 	scope := pullScope(p, entries, read, edges)
-	// **A cycle of edges fails the check, naming every module and edge** (novox/hq ADR 0419 clause 6), a lone pull
-	// request's as a group's composed check is: no order exists for what it changes.
-	alone := orderMember{ID: p.Owner + "/" + p.Repo + "@" + twelve(p.Commit), Repository: p.Owner + "/" + p.Repo, Base: p.Base,
-		Head: p.Commit, Number: p.Number, Paths: p.Paths, PathsTruncated: p.PathsTruncated, Removed: p.Removed, BaseSHA: p.BaseSHA}
-	if failing, cyclic, err := cycleVerdict(ctx, "", []orderMember{alone},
-		map[string]orderReach{alone.ID: {Moved: scope.Modules}}, edges, entries); err != nil {
-		return "", err
-	} else if cyclic {
-		failing.Commit, failing.Trunk = p.Commit, twelve(p.BaseSHA)
-		fmt.Fprintf(w, "%s/%s#%d (%.8s): %s\n", p.Owner, p.Repo, p.Number, p.Commit, failing.Summary)
-		sayChecked(ctx, w, failing)
-		return "", nil
+	this := pullAtOf(p)
+	if this.Truncated {
+		this.Paths, this.Truncated = truncatedPaths(entries, p.Owner, p.Repo, scope.Modules), false
 	}
-	// **A member of a group whose gate is the composed check's runs its repository's check alone** (novox/hq ADR 0403
-	// clause 1): mesh-delivery is asked once, and says so on the group's line. Told nothing, the pull request is
-	// checked alone, gate included (clause 6).
-	lines, groupsErr := groupsAsked(ctx, deliverySeatHeld(entries))
-	composed := groupsErr == nil && composedMember(p, lines)
-	// The change plan of the commit at hand (ADR 0238): what a merge of it would build and send, posted
-	// with the verdict whatever the verdict is.
-	plan := changePlanOf(p.Owner+"/"+p.Repo, p.Base, p.Commit, scope.Reach, entries, func(module string) (inventory.Upgrade, bool) {
-		u, err := inv.UpgradeOf(ctx, module)
-		return u, err == nil
-	})
-	fmt.Fprint(w, planText(plan))
-	direct := directVerdict(p, plan)
-	if composed {
-		scope.Modules, scope.Dependents, scope.New, scope.Manifests = nil, nil, nil, nil
-		composedGate(&direct)
+	if scope.gated() || holdsModules(entries, p.Owner, p.Repo) {
+		tellPullDeclares(ctx, w, []pullAt{this})
 	}
-	switch {
-	case !scope.gated() && !scope.Mesh:
-		fmt.Fprintf(w, "%s/%s#%d (%.8s): %s, and the repository is not the mesh's: said, nothing run\n",
-			p.Owner, p.Repo, p.Number, p.Commit, noModuleTouched)
-		sayChecked(ctx, w, direct)
-		return "", nil
-	case !scope.gated() && p.MergeCheckSaid && !p.MergeCheck:
-		direct.RepoCheck = &link.CheckLayer{Verdict: "warning", Summary: noMergeCheck}
-		fmt.Fprintf(w, "%s/%s#%d (%.8s): %s; %s\n", p.Owner, p.Repo, p.Number, p.Commit, noModuleTouched, noMergeCheck)
-		sayChecked(ctx, w, direct)
-		return "", nil
-	}
-	request, err := checkRequestFor(ctx, f.open, p, scope, entries)
-	if err != nil {
-		return "", err
-	}
-	request.Check.Plan = &plan
-	request.Check.Composed = composed
-	// **The group's other open pull requests are read beside it** (novox/hq ADR 0382 §1).
-	siblingsFrom(&request, p, entries, lines, groupsErr)
-	seat := buildSeatHeld(ctx)
-	ask, err := askOverOn(seat)
-	if err != nil {
-		return "", err
-	}
-	defer ask.Close()
-	if err := ask.Ask(ctx, request); err != nil {
-		return "", err
-	}
-	// **A newer request replaces the one still waiting, and a newer key stops the one running** (novox/hq ADR 0406 §3, §4,
-	// issue 974): the check queue keeps one request a pull request, and a running check watches its key. Nothing is asked
-	// of the forge here (issue 726).
-	what := "its own merge-check.sh alone: " + noModuleTouched
-	if composed {
-		what = "its own merge-check.sh alone: the gate is its group's composed check's"
-	}
-	if scope.gated() {
-		what = fmt.Sprintf("the gate over %s (a merge would build %d module(s) in %d tier(s))",
-			strings.Join(append(append([]string{}, scope.Modules...), prefixedAll("new:", scope.New)...), ", "),
-			scope.Width, scope.Tiers)
-	}
-	fmt.Fprintf(w, "%s/%s#%d (%.8s): asked %s to check it before it merges — %s — as %s\n", p.Owner, p.Repo, p.Number,
-		p.Commit, seat, what, request.ID)
-	return request.ID, nil
-}
-
-// composedWords is what a group member's own verdict says of its gate layer (novox/hq ADR 0403 clause 1).
-const composedWords = "judged by its group's composed check"
-
-// gateComposed is a gate layer's verdict when no gate was run for the member alone: never a pass. Mesh-delivery reads it
-// as the composed check's to judge, and the forge's holder sets no mesh/merge-gate from it.
-const gateComposed = "composed"
-
-// composedGate says a group member's own verdict has no gate of its own: its gate layer, and the verdict that is
-// the gate's, read "composed" in place of a pass.
-func composedGate(c *link.Checked) {
-	c.Verdict, c.Summary = gateComposed, composedWords
-	c.Gate = &link.CheckLayer{Verdict: gateComposed, Summary: composedWords}
-}
-
-// directVerdict is the verdict of a change no build judges — it touches no module, and either the repository is not
-// the mesh's or the head holds no merge-check.sh. **It names the trunk commit it holds for** (novox/hq ADR 0323 §3):
-// the base branch's head the forge announced with the head, so the merge tool can weigh it against the trunk's head
-// and does not refuse it for ever (a verdict naming no trunk is never the trunk's head's). Nothing was built to
-// judge: the trunk commit is the one the forge said the change was announced against.
-func directVerdict(p link.PullUpdated, plan link.ChangePlan) link.Checked {
-	trunk := p.BaseSHA
-	if len(trunk) > 12 {
-		trunk = trunk[:12]
-	}
-	if trunk != "" {
-		plan.Trunk = trunk
-	}
-	return link.Checked{Owner: p.Owner, Repo: p.Repo, Number: p.Number, Commit: p.Commit,
-		ID: link.NewBuildID(time.Now()), Verdict: "pass", Summary: noModuleTouched,
-		Gate: &link.CheckLayer{Verdict: "pass", Summary: noModuleTouched}, Plan: &plan, Trunk: trunk}
-}
-
-// checkRequestFor is the ask for one pull request's head: the repository as the mesh clones it, the head,
-// and what is read beside it.
-func checkRequestFor(ctx context.Context, open *stores, p link.PullUpdated, scope checkScope,
-	entries []inventory.Entry) (link.BuildRequest, error) {
-	shelf := map[string]catalogue.Manifest{}
-	for _, e := range entries {
-		shelf[e.Manifest.Module] = e.Manifest
-	}
-	world, err := restOfTheMesh(ctx, open, shelf, "")
-	if err != nil {
-		return link.BuildRequest{}, err
-	}
-	clone := func(s inventory.Source) (string, error) {
-		if s.Seat == "" {
-			return s.Repository, nil
-		}
-		return clonedFromSeat(world, s.Seat, s.Repository)
-	}
-	// As the mesh clones a module built from it; a repository no module is built from, from the forge.
-	source := inventory.Source{Seat: gitSeat, Repository: p.Owner + "/" + p.Repo}
-	if scope.From != nil {
-		source = scope.From.Source
-	}
-	repository, err := clone(source)
-	if err != nil {
-		return link.BuildRequest{}, err
-	}
-	current, err := open.inventory.CurrentBuilds(ctx)
-	if err != nil {
-		return link.BuildRequest{}, err
-	}
-	beside, err := besideOf(entries, func(module string) string { return current[module].Commit }, clone)
-	if err != nil {
-		return link.BuildRequest{}, err
-	}
-	builds := checkBuildsOf(p, scope, entries, clone)
-	return link.BuildRequest{
-		ID:         link.NewBuildID(time.Now()),
-		Repository: repository,
-		Ref:        p.Commit,
-		Held:       heldBy(ctx),
-		Seats:      seatBases(ctx),
-		Source:     sourceOnSeat(source),
-		Check:      checkOf(p, scope, entries, beside, builds, namedForTheCheck(ctx, p, builds), runningBy(ctx)),
-	}, nil
-}
-
-// checkOf is the check a request carries: the pull request, what the change touches, and the buckets of the pull
-// requests' keys of the modules claiming the delivery seat (novox/hq ADR 0437 §3, issue 1212).
-func checkOf(p link.PullUpdated, scope checkScope, entries []inventory.Entry, beside map[string]link.CheckedOut,
-	builds []link.CheckBuild, named []link.CheckedBuild, running map[string]string) *link.CheckRequest {
-	return &link.CheckRequest{Pulls: pullsBucketsOf(entries), Owner: p.Owner, Repo: p.Repo, Number: p.Number, Base: p.Base,
-		Trunk: p.BaseSHA, Ready: p.Ready, Paths: p.Paths, Beside: beside, Modules: scope.Modules, Dependents: scope.Dependents,
-		New: scope.New, Manifests: scope.Manifests, Judge: scope.Judge, Builds: builds, Named: named, Running: running}
-}
-
-// besideOf is what a check reads beside its own repository, by the directory it is found under: each core repository
-// by the module the mesh builds from it, at besideRefs. running is the commit the mesh runs of a module.
-func besideOf(entries []inventory.Entry, running func(module string) string,
-	clone func(inventory.Source) (string, error)) (map[string]link.CheckedOut, error) {
-	beside := map[string]link.CheckedOut{}
-	for _, e := range entries {
-		dir, core := coreModules[e.Manifest.Module]
-		if !core || e.Provided || e.Source.Repository == "" {
-			continue
-		}
-		url, err := clone(e.Source)
-		if err != nil {
-			return nil, err
-		}
-		refs := besideRefs(dir, running(e.Manifest.Module))
-		beside[dir] = link.CheckedOut{Repository: url, Ref: refs[dir]}
-		if dir == "mesh-controller" {
-			// The controller's main stays its main: it judges only a check the running controller predates.
-			beside["mesh-controller-main"] = link.CheckedOut{Repository: url, Ref: refs["mesh-controller-main"]}
-			if e.Source.Seat != "" {
-				for _, sibling := range []string{"mesh-lab", "mesh-sdk"} {
-					if url, err := clone(inventory.Source{Seat: e.Source.Seat, Repository: siblingOf(e.Source.Repository,
-						sibling)}); err == nil {
-						beside[sibling] = link.CheckedOut{Repository: url, Ref: refs[sibling]}
-					}
-				}
-			}
-		}
-	}
-	return beside, nil
-}
-
-// trunkOf is the branch a module's source follows: main when it records none, or records a commit.
-func trunkOf(s inventory.Source) string {
-	if t := strings.TrimSpace(followedBranch(s.Ref)); t != "" {
-		return t
-	}
-	return "main"
-}
-
-// sourceName is the name of a recorded repository, a path on the git seat or a URL: novox/mesh-host → mesh-host.
-func sourceName(repository string) string {
-	parts := strings.Split(strings.Trim(strings.TrimSuffix(repository, ".git"), "/"), "/")
-	if len(parts) < 2 {
-		return ""
-	}
-	return parts[len(parts)-1]
-}
-
-// namedForTheCheck are the builds earlier checks of the same pull request at the same head named, read once for the
-// check (novox/hq issue 703): asked again because only the trunk moved, the check keeps what they built of a key
-// still the same. Another pull request's build, or one of an earlier head, is never kept. None when they cannot be
-// read, and the check builds, as before.
-func namedForTheCheck(ctx context.Context, p link.PullUpdated, builds []link.CheckBuild) []link.CheckedBuild {
-	if len(builds) == 0 || p.Commit == "" {
-		return nil
-	}
-	pull := link.PullRef{Owner: p.Owner, Repo: p.Repo, Number: p.Number}
-	read, err := checkedBuildsOf(ctx, []link.PullRef{pull})
-	if err != nil {
-		fmt.Printf("  the earlier checks' builds of %s/%s#%d could not be read, so the check builds: %v\n",
-			p.Owner, p.Repo, p.Number, err)
-		// empty-on-error: said above; a check handed no named build builds every module, as before issue 703
-		return nil
-	}
-	var named []link.CheckedBuild
-	for _, b := range read {
-		if b.Pull == pull && link.SameHead(b.Head, p.Commit) {
-			named = append(named, b)
-		}
-	}
-	return named
-}
-
-// checkBuildsOf are the modules a merge of the change would build, in the walk's order, as the check builds them
-// for the walk to take (novox/hq ADR 0350 §1): a module built from the repository checked, at the branch it merges
-// into, from the merge the check makes; any other — a module standing on one — from its own repository at the
-// branch it follows, as the walk builds it. A module whose build reads the repository checked through a context,
-// or that the merge deletes, cannot be built as the walk would: said, and nothing after it is built. A change that
-// moves no module builds nothing.
-func checkBuildsOf(p link.PullUpdated, scope checkScope, entries []inventory.Entry,
-	clone func(inventory.Source) (string, error)) []link.CheckBuild {
-	if len(scope.Reach.Plan.Tiers) == 0 {
-		return nil
-	}
-	m := link.SourceMoved{Owner: p.Owner, Repo: p.Repo, Base: p.Base, CloneURL: p.CloneURL}
-	byName := map[string]inventory.Entry{}
-	for _, e := range entries {
-		byName[e.Manifest.Module] = e
-	}
-	skip := map[string]string{}
-	for _, e := range scope.Reach.Packaging {
-		skip[e.Manifest.Module] = "its build reads " + p.Owner + "/" + p.Repo + " through a context, which a check " +
-			"cannot hand the merge"
-	}
-	for _, e := range scope.Reach.Deleted {
-		skip[e.Manifest.Module] = "the merge deletes it"
-	}
-	var out []link.CheckBuild
-	for tier, names := range scope.Reach.Plan.Tiers {
-		for _, name := range names {
-			e, known := byName[name]
-			b := link.CheckBuild{Module: name, Tier: tier, Skip: skip[name]}
-			switch {
-			case !known:
-				b.Skip = "the catalogue does not hold it"
-			case b.Skip != "":
-			case sourceIs(e.Source, m):
-				b.Merged, b.Path = true, e.Source.Path
-			default:
-				url, err := clone(e.Source)
-				if err != nil {
-					b.Skip = "its repository cannot be cloned: " + err.Error()
-					break
-				}
-				b.Repository, b.Path, b.Ref = url, e.Source.Path, followedBranch(e.Source.Ref)
-			}
-			out = append(out, b)
-		}
-	}
-	return out
+	return nil
 }
 
 // besideRefs is the ref each repository is cloned at beside a check, by the directory it is found under:
@@ -501,186 +187,5 @@ func sdkPinned() string {
 	return "main"
 }
 
-// siblingOf is another repository of the same owner: novox/mesh-controller → novox/mesh-lab.
-func siblingOf(repository, name string) string {
-	if cut := strings.LastIndex(repository, "/"); cut >= 0 {
-		return repository[:cut+1] + name
-	}
-	return name
-}
-
-// sourceOnSeat is a source's seat form, nil for one on no seat.
-func sourceOnSeat(s inventory.Source) *link.SourceOnSeat {
-	if s.Seat == "" {
-		return nil
-	}
-	return &link.SourceOnSeat{Seat: s.Seat, Repository: s.Repository}
-}
-
 // checkEvents is where the serving controller says a check's verdict; nil in a command.
 var checkEvents link.Bus
-
-// maxCheckReport is how much of a check's report travels in its verdict: enough for the failures and
-// the machines, never a log.
-const maxCheckReport = 60 << 10
-
-// checked says a merge check's verdict as the controller's `checked`. Nothing is recorded or
-// registered: a check builds nothing (issue 240's rule for a dry run, kept for a check).
-func checked(ctx context.Context, result link.BuildResult) {
-	// **A check stopped by its key says nothing** (novox/hq ADR 0406 §4, issue 974, review 2): it stopped because the head or
-	// the trunk commit moved on, and the newer request will judge. Said as an error it would name the live head — red
-	// statuses on the forge, a delivery refused — and written to the key it would stand in the newer request's way.
-	if result.Failed == link.SupersededByKey {
-		fmt.Printf("%s: stopped, its pull request's key moved on; the newer check will judge\n", result.ID)
-		return
-	}
-	sayChecked(ctx, os.Stdout, checkedOf(result))
-}
-
-// checkedOf is what a check's outcome says: each layer, and an error — never a pass — for a check that
-// could not run.
-func checkedOf(result link.BuildResult) link.Checked {
-	c := link.Checked{ID: result.ID, On: result.On, Commit: result.Ref}
-	if result.Checked != nil {
-		c.Owner, c.Repo, c.Number = result.Checked.Owner, result.Checked.Repo, result.Checked.Number
-	}
-	switch {
-	case result.Check != nil:
-		c.Verdict, c.Summary, c.Report = result.Check.Verdict, result.Check.Summary, result.Check.Report
-		c.Gate, c.RepoCheck = result.Check.Gate, result.Check.RepoCheck
-		// What was judged (novox/hq ADR 0323 §3): the head merged into the trunk commit, and the commits of the
-		// repositories read beside it.
-		c.Trunk, c.Beside, c.Took = result.Check.Trunk, result.Check.Beside, result.Check.Took
-		c.Built = result.Check.Built
-		c.Validator = result.Check.Validator
-		c.Siblings, c.SiblingsUnknown, c.JudgeFrom = result.Check.Siblings, result.Check.SiblingsUnknown, result.Check.JudgeFrom
-		if c.Gate == nil {
-			// A build seat from before the layers: its verdict is the gate's.
-			c.Gate = &link.CheckLayer{Verdict: c.Verdict, Summary: c.Summary}
-		}
-	case result.Failed != "":
-		// The check could not run: an error, never read as a pass — on both layers it was asked for.
-		c.Verdict, c.Summary = "error", "the check could not run: "+firstLine(result.Failed)
-	default:
-		c.Verdict, c.Summary = "error", "the build seat answered the check with no verdict"
-	}
-	if c.Verdict == "" {
-		c.Verdict = "error"
-	}
-	if result.Check == nil {
-		c.Gate = &link.CheckLayer{Verdict: c.Verdict, Summary: c.Summary}
-		c.RepoCheck = &link.CheckLayer{Verdict: c.Verdict, Summary: c.Summary}
-	}
-	// **A group member's own check has no gate of its own** (novox/hq ADR 0403 clause 1): what ran was the repository's
-	// check alone, and its gate layer is "composed", never a pass. A failure or an error stays what it was.
-	if result.Checked != nil && result.Checked.Composed && result.Check != nil && c.Gate != nil &&
-		(c.Gate.Verdict == "pass" || c.Gate.Verdict == "warning") {
-		composedGate(&c)
-	}
-	if result.Checked != nil && c.Gate != nil && len(c.Gate.Modules) == 0 {
-		c.Gate.Modules = append(append([]string{}, result.Checked.Modules...), prefixedAll("new:", result.Checked.New)...)
-	}
-	if result.Checked != nil && c.Gate != nil && len(c.Gate.Dependents) == 0 {
-		c.Gate.Dependents = result.Checked.Dependents
-	}
-	if result.Checked != nil {
-		c.Plan = result.Checked.Plan
-		if c.Plan != nil && c.Trunk != "" {
-			// The kept delivery plan records the trunk commit with its other inputs (ADR 0323 §3).
-			plan := *c.Plan
-			plan.Trunk = c.Trunk
-			c.Plan = &plan
-		}
-		// A delivery group's composed check (novox/hq ADR 0239): every head it judged, this one first.
-		if g := result.Checked; g.Group != "" {
-			c.Group = g.Group
-			c.Members = append(c.Members, link.CheckedMember{Owner: g.Owner, Repo: g.Repo, Number: g.Number,
-				Commit: result.Ref, Trunk: c.Trunk})
-			for _, m := range g.Members {
-				c.Members = append(c.Members, link.CheckedMember{Owner: m.Owner, Repo: m.Repo, Number: m.Number,
-					Commit: m.Ref, Trunk: memberTrunk(result.Check, m)})
-			}
-		}
-	}
-	for _, l := range []*link.CheckLayer{c.Gate, c.RepoCheck} {
-		if l != nil && l.Verdict == "" {
-			l.Verdict = "error"
-		}
-	}
-	// **A check run again says so** (novox/hq issue 594). The summaries are the lines the pull request
-	// shows, clipped by the forge to a few words, so they get only a short marker after the verdict's own
-	// words; the report gets the whole sentence. Layers copied, so the build's own outcome is left as it came.
-	if mark := link.RunMarker(result.Delivery); mark != "" {
-		c.Summary += " " + mark
-		for _, l := range []**link.CheckLayer{&c.Gate, &c.RepoCheck} {
-			if *l != nil {
-				layer := **l
-				layer.Summary += " " + mark
-				*l = &layer
-			}
-		}
-		c.Report = link.Restarted(result.Delivery) + "\n\n" + c.Report
-	}
-	if len(c.Report) > maxCheckReport {
-		c.Report = "…" + c.Report[len(c.Report)-maxCheckReport:]
-	}
-	return c
-}
-
-// memberTrunk is the trunk commit the build seat merged one of a group's heads into (novox/hq ADR 0323 §6), empty
-// when it said none.
-func memberTrunk(outcome *link.CheckOutcome, m link.GroupMember) string {
-	if outcome == nil {
-		return ""
-	}
-	for _, j := range outcome.Members {
-		if strings.EqualFold(j.Owner, m.Owner) && strings.EqualFold(j.Repo, m.Repo) && strings.HasPrefix(m.Ref, j.Commit) {
-			return j.Trunk
-		}
-	}
-	return ""
-}
-
-func prefixedAll(prefix string, items []string) []string {
-	out := make([]string, 0, len(items))
-	for _, i := range items {
-		out = append(out, prefix+i)
-	}
-	return out
-}
-
-// sayChecked says a merge check's verdict on the bus, where the forge's holder hears it.
-func sayChecked(ctx context.Context, w io.Writer, c link.Checked) {
-	repo := "none"
-	if c.RepoCheck != nil {
-		repo = strings.ToUpper(c.RepoCheck.Verdict) + " — " + c.RepoCheck.Summary
-	}
-	judged := ""
-	if c.Trunk != "" {
-		judged = " merged into trunk " + c.Trunk
-	}
-	fmt.Fprintf(w, "%s: %s/%s#%d at %.8s%s checked on %s: gate %s — %s; repository %s\n", c.ID, c.Owner, c.Repo, c.Number,
-		c.Commit, judged, orSomewhere(c.On), strings.ToUpper(c.Verdict), c.Summary, repo)
-	if checkEvents == nil {
-		return
-	}
-	body, err := json.Marshal(c)
-	if err != nil {
-		return
-	}
-	stating, stop := context.WithTimeout(context.WithoutCancel(ctx), 10*time.Second)
-	defer stop()
-	if err := checkEvents.PublishSeatEvent(stating, link.MeshControllerSeat, link.KeyChecked, body); err != nil {
-		fmt.Fprintf(w, "%s: the verdict could not be said, so the pull request is not told it: %v\n", c.ID, err)
-	}
-}
-
-// pullsBucketsOf are the buckets of the pull requests' keys a check names for the build agent: one per module
-// claiming the delivery seat, in the order of their names (novox/hq ADR 0437 §3, issue 1212).
-func pullsBucketsOf(entries []inventory.Entry) []string {
-	var out []string
-	for _, m := range claimantsOf(entries, catalogue.DeliverySeat) {
-		out = append(out, broker.BucketName(m, "pulls"))
-	}
-	return out
-}

cmd/mesh-controller/checks_integration_test.go

@@ -1,56 +0,0 @@
-//go:build integration
-
-package main
-
-import (
-	"encoding/json"
-	"testing"
-	"time"
-
-	"github.com/nats-io/nats.go"
-	"github.com/novox/mesh-controller/internal/broker"
-	"github.com/novox/mesh-controller/internal/link"
-	"github.com/novox/mesh-controller/internal/testbus"
-)
-
-func TestACheckStoppedByItsKeyIsAnnouncedAsNoVerdict(t *testing.T) {
-	js, err := broker.Dial(testbus.URL(t))
-	if err != nil {
-		t.Fatal(err)
-	}
-	t.Cleanup(js.Close)
-	if err := broker.AssertMeshStreams(js); err != nil {
-		t.Fatal(err)
-	}
-	legacy, err := js.Conn().JetStream()
-	if err != nil {
-		t.Fatal(err)
-	}
-	was := checkEvents
-	checkEvents = link.OverNATS{Conn: js.Conn(), JS: legacy}
-	t.Cleanup(func() { checkEvents = was })
-	heard := make(chan *nats.Msg, 4)
-	sub, err := js.Conn().ChanSubscribe(link.SeatEventSubject(link.MeshControllerSeat, link.KeyChecked), heard)
-	if err != nil {
-		t.Fatal(err)
-	}
-	defer func() { _ = sub.Unsubscribe() }()
-	asked := &link.CheckRequest{Owner: "novox", Repo: "mesh-catalog", Number: 3}
-	checked(t.Context(), link.BuildResult{ID: "stopped", Ref: "abc", Checked: asked, Failed: link.SupersededByKey})
-	checked(t.Context(), link.BuildResult{ID: "broken", Ref: "abc", Checked: asked, Failed: "the facts snapshot cannot be read"})
-	select {
-	case m := <-heard:
-		var c link.Checked
-		_ = json.Unmarshal(m.Data, &c)
-		if c.ID != "broken" || c.Verdict != "error" {
-			t.Fatalf("the first verdict said is %+v; want only the broken check's error", c)
-		}
-	case <-time.After(5 * time.Second):
-		t.Fatal("nothing was said")
-	}
-	select {
-	case m := <-heard:
-		t.Fatalf("a second verdict was said: %s", m.Data)
-	case <-time.After(300 * time.Millisecond):
-	}
-}

cmd/mesh-controller/checks_queue_test.go

@@ -1,97 +0,0 @@
-//go:build integration
-
-package main
-
-import (
-	"context"
-	"encoding/json"
-	"fmt"
-	"testing"
-
-	"github.com/nats-io/nats.go"
-
-	"git.novox.be/novox/mesh-sdk/go/catalogue"
-	"github.com/novox/mesh-controller/internal/broker"
-	"github.com/novox/mesh-controller/internal/inventory"
-	"github.com/novox/mesh-controller/internal/link"
-)
-
-// Acceptance 5 of milestone 2 (novox/hq ADR 0406 §3, issue 974), live, with the store and a real bus: two merges into one
-// repository within a minute, with two open pull requests, leave each pull request with exactly one queued check, by the
-// stream's rule. Each merge moves the trunk, and mesh-delivery asks the controller to check both open pull requests again
-// against it (`delivery check`, which is the controller's own path for a head announced); nothing moves a request, nothing
-// asks the forge, and the queue is read back whole.
-func TestTwoMergesWithinAMinuteLeaveEachOpenPullRequestOneQueuedCheck(t *testing.T) {
-	open := aMesh(t)
-	ctx := t.Context()
-	js, _ := aBuildQueue(t)
-	servingBus.Store(js)
-	t.Cleanup(func() { servingBus.Store(nil) })
-	holdTheDeliverySeat(t, open)
-	was := askDeliveryOwner
-	t.Cleanup(func() { askDeliveryOwner = was })
-	askDeliveryOwner = func(_ context.Context, _ *nats.Conn, verb string, _ map[string]any) (json.RawMessage, error) {
-		if verb != "groups" {
-			t.Fatalf("asked the owner %s", verb)
-		}
-		return json.RawMessage(`[]`), nil
-	}
-	// The repository the two pull requests are into, as a module the mesh builds from it.
-	if err := open.inventory.RegisterModule(ctx, catalogue.Manifest{Module: "mesh-controller", Version: "1"},
-		inventory.Source{Repository: "novox/mesh-controller", Ref: "main", BuiltFrom: "c0", Head: "c0"}); err != nil {
-		t.Fatal(err)
-	}
-
-	heads := map[int]string{7: "7777777777777777777777777777777777777777", 8: "8888888888888888888888888888888888888888"}
-	check := func(number int, trunk string) {
-		t.Helper()
-		p := orderMember{ID: fmt.Sprintf("novox/mesh-controller@%.12s", heads[number]), Repository: "novox/mesh-controller",
-			Base: "main", Head: heads[number], Number: number, Paths: []string{"main.go"}, ModuleDirsSaid: true,
-			BaseSHA: trunk, Ready: number == 8}.pull()
-		p.MergeCheck, p.MergeCheckSaid = true, true
-		if err := (following{open: open, oneShot: true}).PullUpdated(ctx, p); err != nil {
-			t.Fatal(err)
-		}
-	}
-	// Announced against the trunk as it stands, then asked again after each of two merges.
-	for _, trunk := range []string{"1111111111111111111111111111111111111111", "2222222222222222222222222222222222222222",
-		"3333333333333333333333333333333333333333"} {
-		check(7, trunk)
-		check(8, trunk)
-	}
-
-	q, err := link.ReadQueue(ctx, js, link.TheBuildMachine)
-	if err != nil {
-		t.Fatal(err)
-	}
-	seen := map[int]string{}
-	for _, a := range q.Asks {
-		c := a.Request.Check
-		if c == nil {
-			t.Fatalf("%s is no check", a.ID)
-		}
-		if _, twice := seen[c.Number]; twice {
-			t.Errorf("pull request %d has two queued checks", c.Number)
-		}
-		seen[c.Number] = c.Trunk
-		if a.State != link.AskWaiting {
-			t.Errorf("%s is %s", a.ID, a.State)
-		}
-		if want := "3333333333333333333333333333333333333333"; c.Trunk != want {
-			t.Errorf("pull request %d is queued against %.8s; want the newest trunk %.8s", c.Number, c.Trunk, want)
-		}
-	}
-	if len(seen) != 2 {
-		t.Fatalf("queued checks for %v; want one for each of the two open pull requests", seen)
-	}
-	// By the streams' own count: the ready one on its stream, the other on its.
-	for stream, want := range map[string]uint64{broker.ChecksReadyStream: 1, broker.ChecksOtherStream: 1} {
-		info, err := js.Context().StreamInfo(stream)
-		if err != nil {
-			t.Fatal(err)
-		}
-		if info.State.Msgs != want {
-			t.Errorf("%s holds %d request(s); want %d", stream, info.State.Msgs, want)
-		}
-	}
-}

cmd/mesh-controller/checks_test.go

@@ -1,7 +1,6 @@
 package main
 
 import (
-	"errors"
 	"strings"
 	"testing"
 
@@ -76,8 +75,8 @@ func TestThePullRequestIsMappedOntoTheModuleGraph(t *testing.T) {
 				t.Errorf("%s: %s %q, wanted %q", c.what, what, got[i], want[i])
 			}
 		}
-		if s.Mesh != c.mesh || s.Judge != c.judge {
-			t.Errorf("%s: the mesh's %v judged by %q, wanted %v by %q", c.what, s.Mesh, s.Judge, c.mesh, c.judge)
+		if s.Mesh != c.mesh {
+			t.Errorf("%s: the mesh's %v, wanted %v", c.what, s.Mesh, c.mesh)
 		}
 		if s.gated() != (c.modules != "" || c.new != "") {
 			t.Errorf("%s: gated %v", c.what, s.gated())
@@ -95,28 +94,6 @@ func TestAPullRequestTouchesWhatPackagesItsRepository(t *testing.T) {
 	}
 }
 
-// Each layer is said; a check that could not run is an error on both, never a pass; a build seat from
-// before the layers is read as the gate.
-func TestAChecksLayersAreEachSaidAndAnErrorIsNeverAPass(t *testing.T) {
-	asked := &link.CheckRequest{Owner: "novox", Repo: "mesh-catalog", Number: 3, Modules: []string{"gitea"}}
-	c := checkedOf(link.BuildResult{ID: "b", Ref: "abc", Checked: asked, Failed: "the facts snapshot cannot be read"})
-	if c.Verdict != "error" || c.Gate == nil || c.Gate.Verdict != "error" || c.RepoCheck == nil || c.RepoCheck.Verdict != "error" {
-		t.Fatalf("a check that could not run said %+v", c)
-	}
-	if strings.Join(c.Gate.Modules, ",") != "gitea" {
-		t.Errorf("the gate names %v", c.Gate.Modules)
-	}
-	c = checkedOf(link.BuildResult{ID: "b", Ref: "abc", Checked: asked, Check: &link.CheckOutcome{Verdict: "warning", Summary: "wide"}})
-	if c.Gate == nil || c.Gate.Verdict != "warning" || c.RepoCheck != nil {
-		t.Fatalf("an outcome without layers said %+v", c)
-	}
-	c = checkedOf(link.BuildResult{ID: "b", Ref: "abc", Checked: asked, Check: &link.CheckOutcome{Verdict: "pass",
-		Gate: &link.CheckLayer{Verdict: "pass"}, RepoCheck: &link.CheckLayer{Verdict: "fail", Summary: "its merge-check.sh failed"}}})
-	if c.RepoCheck.Verdict != "fail" || c.Gate.Verdict != "pass" {
-		t.Fatalf("the layers said %+v / %+v", c.Gate, c.RepoCheck)
-	}
-}
-
 // **The check asks the planner, never a mapping of its own** (novox/hq ADR 0238): what a pull request
 // reaches is reachOfMerge's answer — the same that plans a merge — so a file at the root touches no
 // module in both, and what stands on a touched module is named as its dependents in both.
@@ -171,123 +148,5 @@ func TestAPullRequestReachesWhatAMergeOfItWouldPlan(t *testing.T) {
 	}
 }
 
-// **Only a commit on the trunk is published** (novox/hq ADR 0238): a build of a commit off its repository's
-// default branch — a pull request's head, a branch built by hand, a rebuild or replay of one — is recorded
-// and never registered, so nothing can send it; a check or a dry run never is either.
-func TestABuildOffTheTrunkIsNeverPublished(t *testing.T) {
-	on := link.BuildResult{ID: "b", Commit: "abc", Trunk: "main", OnTrunk: true}
-	if err := publishable(on, ""); err != nil {
-		t.Errorf("a build on the trunk was refused: %v", err)
-	}
-	off := link.BuildResult{ID: "b", Commit: "abc", Trunk: "main"}
-	if err := publishable(off, ""); !errors.Is(err, errOffTheTrunk) || !strings.Contains(err.Error(), "main") {
-		t.Errorf("a build off the trunk was let through: %v", err)
-	}
-	for _, r := range []link.BuildResult{
-		{ID: "c", Trunk: "main", OnTrunk: true, Check: &link.CheckOutcome{Verdict: "pass"}},
-		{ID: "d", Trunk: "main", OnTrunk: true, Checked: &link.CheckRequest{}},
-		{ID: "e", Trunk: "main", OnTrunk: true, DryRun: true},
-	} {
-		if publishable(r, "") == nil {
-			t.Errorf("%s, a check or a dry run, was publishable", r.ID)
-		}
-	}
-	// A module that follows a branch other than the default: that branch is its trunk, and the default
-	// is not.
-	follows := link.BuildResult{ID: "g", Commit: "abc", Trunk: "master", Branches: []string{"nox-mesh"}}
-	if err := publishable(follows, "nox-mesh"); err != nil {
-		t.Errorf("a commit on the branch a module follows was refused: %v", err)
-	}
-	if err := publishable(link.BuildResult{ID: "h", Commit: "abc", Trunk: "master", OnTrunk: true,
-		Branches: []string{"master"}}, "nox-mesh"); err == nil {
-		t.Error("a commit on the default but not on the branch the module follows was published")
-	}
-	if err := publishable(link.BuildResult{ID: "i", Commit: "abc", Trunk: "main", Branches: []string{"feat/x"}}, ""); err == nil {
-		t.Error("a feature branch's commit was published")
-	}
-	// A build seat older than the rule says nothing: let through and said, so the rule can reach the mesh.
-	if err := publishable(link.BuildResult{ID: "f", Commit: "abc"}, ""); err != nil {
-		t.Errorf("a build seat that said nothing was refused: %v", err)
-	}
-}
-
-// **A verdict names the trunk commit it judged** (novox/hq ADR 0323 §3, issue 341): the controller's `checked`
-// carries the head and the trunk commit the build seat merged it into, the commits of the repositories read beside
-// it, how long it took, and the kept delivery plan records the trunk commit with its other inputs. A group's
-// composed check names, per member, the trunk commit that head was merged into (§6).
-func TestAVerdictNamesTheTrunkCommitItJudged(t *testing.T) {
-	plan := &link.ChangePlan{Repository: "novox/mesh-host", Base: "main", Head: "dfb1415aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
-		Summary: "builds mesh-host"}
-	asked := &link.CheckRequest{Owner: "novox", Repo: "mesh-host", Number: 66, Base: "main", Plan: plan}
-	c := checkedOf(link.BuildResult{ID: "b", Ref: "dfb1415aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa", Checked: asked,
-		Check: &link.CheckOutcome{Verdict: "pass", Took: "4m12s", Head: "dfb1415aaaaa", Trunk: "d28ca95bbbbb",
-			Gate: &link.CheckLayer{Verdict: "pass"}, RepoCheck: &link.CheckLayer{Verdict: "pass"},
-			Beside: map[string]string{"mesh-catalog": "0123456789ab", "mesh-lab": "ba9876543210"}}})
-	if c.Trunk != "d28ca95bbbbb" || c.Commit != "dfb1415aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" {
-		t.Fatalf("the verdict names head %s and trunk %q", c.Commit, c.Trunk)
-	}
-	if c.Beside["mesh-catalog"] != "0123456789ab" || c.Beside["mesh-lab"] != "ba9876543210" {
-		t.Fatalf("the verdict names the repositories read beside it as %v", c.Beside)
-	}
-	if c.Took != "4m12s" {
-		t.Fatalf("the verdict says it took %q", c.Took)
-	}
-	if c.Plan == nil || c.Plan.Trunk != "d28ca95bbbbb" || c.Plan.Head != plan.Head {
-		t.Fatalf("the kept plan records %+v", c.Plan)
-	}
-	if plan.Trunk != "" {
-		t.Fatal("the plan the controller asked with was changed: the verdict's is a copy")
-	}
-
-	group := &link.CheckRequest{Owner: "novox", Repo: "mesh-controller", Number: 7, Base: "main", Group: "feat/x",
-		Members: []link.GroupMember{{Owner: "novox", Repo: "mesh-host", Number: 8, Ref: "cccccccccccc0000", Base: "main"}}}
-	c = checkedOf(link.BuildResult{ID: "g", Ref: "aaaaaaaaaaaa0000", Checked: group, Check: &link.CheckOutcome{
-		Verdict: "pass", Head: "aaaaaaaaaaaa", Trunk: "111111111111", Gate: &link.CheckLayer{Verdict: "pass"},
-		Members: []link.CheckedMember{{Owner: "novox", Repo: "mesh-host", Commit: "cccccccccccc", Trunk: "222222222222"}}}})
-	if len(c.Members) != 2 || c.Members[0].Trunk != "111111111111" || c.Members[1].Trunk != "222222222222" ||
-		c.Members[1].Commit != "cccccccccccc0000" {
-		t.Fatalf("the composed check names its members %+v", c.Members)
-	}
-}
-
-// **The merge made for a check is never registered** (novox/hq ADR 0323 §2): a build of it — a commit on no branch
-// of the forge — is refused, naming the trunk. The rule of ADR 0238 §1 stands unchanged; this holds it for the
-// merge commit a check makes.
-func TestABuildOfACheckMergeIsRefusedNamingTheTrunk(t *testing.T) {
-	merge := link.BuildResult{ID: "b", Commit: "4b5c6d7e8f90aabbccddeeff0011223344556677", Trunk: "main"}
-	err := publishable(merge, "")
-	if !errors.Is(err, errOffTheTrunk) || !strings.Contains(err.Error(), "not on main") {
-		t.Fatalf("a build of a check's merge was answered %v", err)
-	}
-}
-
-// **A verdict no build judges names its trunk commit too** (novox/hq ADR 0323 §3): a change touching no module of a
-// repository with no merge-check.sh (novox/mesh-tools-go) is answered by the controller itself. Naming no trunk, the
-// merge tool refused it, asked again, got the same verdict, and refused for ever.
-func TestADirectVerdictNamesTheTrunkTheForgeAnnounced(t *testing.T) {
-	p := link.PullUpdated{Owner: "novox", Repo: "mesh-tools-go", Number: 3, Base: "main", Commit: "1a2b3c4d5e6f7a8b9c0d",
-		BaseSHA: "7a8b9c0d1e2f3a4b5c6d7e8f9a0b1c2d3e4f5a6b"}
-	c := directVerdict(p, link.ChangePlan{Repository: "novox/mesh-tools-go", Base: "main", Head: p.Commit})
-	if c.Trunk != "7a8b9c0d1e2f" || c.Plan == nil || c.Plan.Trunk != "7a8b9c0d1e2f" {
-		t.Fatalf("the direct verdict names trunk %q, its plan %+v", c.Trunk, c.Plan)
-	}
-	if c.Verdict != "pass" || c.Commit != p.Commit {
-		t.Fatalf("the direct verdict is %+v", c)
-	}
-	if c := directVerdict(link.PullUpdated{Owner: "novox", Repo: "x", Commit: "abc"}, link.ChangePlan{}); c.Trunk != "" {
-		t.Fatalf("a forge that said no base head gave the trunk %q", c.Trunk)
-	}
-}
-
-// A head checked again through mesh-delivery (`delivery check --members`, a recheck) reaches the same direct verdict:
-// it names the base head the forge last announced, kept on the member, or the merge tool would refuse it for ever.
-func TestARecheckedHeadsDirectVerdictNamesItsTrunk(t *testing.T) {
-	m := orderMember{ID: "novox/mesh-tools-go@1a2b3c4d5e6f", Repository: "novox/mesh-tools-go", Base: "main",
-		Head: "1a2b3c4d5e6f7a8b9c0d", Number: 3, BaseSHA: "7a8b9c0d1e2f3a4b5c6d7e8f9a0b1c2d3e4f5a6b"}
-	if c := directVerdict(m.pull(), link.ChangePlan{}); c.Trunk != "7a8b9c0d1e2f" {
-		t.Fatalf("a rechecked head's direct verdict names trunk %q", c.Trunk)
-	}
-}
-
 // A check stopped by its pull request's key moving on says no verdict (issue 974, review 2): an error said for it would name the
 // live head, and the newer request is the one that judges. A check that failed for any other reason still says its error.

cmd/mesh-controller/collect.go

@@ -4,7 +4,9 @@ import (
 	"context"
 	"errors"
 	"fmt"
+	"io"
 	"os"
+	"strings"
 	"time"
 
 	"github.com/novox/mesh-controller/internal/artifacts"
@@ -215,27 +217,34 @@ func collect(ctx context.Context, inv *inventory.Inventory) {
 	}
 
 	r := sweep(ctx, inv, artifacts.Store{Address: address}, references, kept, afterBuild)
+	sayCollected(os.Stderr, r)
+}
+
+// sayCollected says what one sweep after a build did.
+func sayCollected(w io.Writer, r sweepResult) {
 	if r.HoldersWritten > 0 {
-		fmt.Fprintf(os.Stderr, "the artifact store now holds %d more kept archive(s) by a manifest\n", r.HoldersWritten)
+		fmt.Fprintf(w, "the artifact store now holds %d more kept archive(s) by a manifest\n", r.HoldersWritten)
 	}
 	if r.Missing > 0 {
-		fmt.Fprintf(os.Stderr, "%d archive(s) the mesh keeps are not in the artifact store at all; "+
+		fmt.Fprintf(w, "%d archive(s) the mesh keeps are not in the artifact store at all; "+
 			"`collection` lists them\n", r.Missing)
 	}
 	if len(r.LetGo) > 0 {
-		fmt.Fprintf(os.Stderr, "the artifact store let go of %d artifact(s) the mesh no longer keeps\n", len(r.LetGo))
+		// **Each one named** (novox/hq issue 1933): a count could not say which archive a machine's 404 was let go of.
+		fmt.Fprintf(w, "the artifact store let go of %d artifact(s) the mesh no longer keeps: %s\n", len(r.LetGo),
+			strings.Join(r.LetGo, ", "))
 	}
 	if r.Stopped != "" && !r.Bounded {
-		fmt.Fprintln(os.Stderr, r.Stopped)
+		fmt.Fprintln(w, r.Stopped)
 	}
 	if r.Held && r.Left > 0 {
-		fmt.Fprintf(os.Stderr, "%d more to collect; the next build asks again\n", r.Left)
+		fmt.Fprintf(w, "%d more to collect; the next build asks again\n", r.Left)
 	}
 	if r.Skipped > 0 {
-		fmt.Fprintf(os.Stderr, "%d artifact(s) the sweep will not address were skipped\n", r.Skipped)
+		fmt.Fprintf(w, "%d artifact(s) the sweep will not address were skipped\n", r.Skipped)
 	}
 	if r.Indexes > 0 {
-		fmt.Fprintf(os.Stderr, "%d eligible index(es) wait for a collect a person confirms, which takes their platforms too\n", r.Indexes)
+		fmt.Fprintf(w, "%d eligible index(es) wait for a collect a person confirms, which takes their platforms too\n", r.Indexes)
 	}
 }
 

cmd/mesh-controller/compose_sdk.go

@@ -239,7 +239,11 @@ func markUnresolvable(err error) error {
 // still names anything foreseen is refused, said, and never sent.
 func composeSend(ctx context.Context, open *stores, node string) (sendable, error) {
 	declared, _, err := composeSendValidated(ctx, open, node)
-	return declared, err
+	if err != nil {
+		return declared, err
+	}
+	// Never a declaration naming an image the store does not hold (novox/hq issue 1742): that module is left out.
+	return withoutMissingImages(ctx, open, node, declared), nil
 }
 
 // composeSendValidated is composeSend and what the node-engine's validator refuses of the declaration it composed, for the

cmd/mesh-controller/composed_member_check_test.go

@@ -1,68 +0,0 @@
-//go:build integration
-
-package main
-
-import (
-	"context"
-	"strings"
-	"testing"
-
-	"git.novox.be/novox/mesh-sdk/go/catalogue"
-	"github.com/novox/mesh-controller/internal/inventory"
-	"github.com/novox/mesh-controller/internal/link"
-)
-
-// A member of a group whose gate is the composed check's is asked of the build seat with no module: its repository's
-// check alone (novox/hq ADR 0403 clause 1). With no word from mesh-delivery, or one that does not say the gate is
-// composed, it is checked alone with its gate (clause 6).
-
-func askedForMember(t *testing.T, answer []groupsLine, answerErr error) link.CheckRequest {
-	t.Helper()
-	open := aMesh(t)
-	ctx := t.Context()
-	js, _ := aBuildQueue(t)
-	servingBus.Store(js)
-	t.Cleanup(func() { servingBus.Store(nil) })
-	if err := open.inventory.RegisterModule(ctx, catalogue.Manifest{Module: "mesh-controller", Version: "1"},
-		inventory.Source{Repository: "novox/mesh-controller", Ref: "main", BuiltFrom: "c0", Head: "c0"}); err != nil {
-		t.Fatal(err)
-	}
-	was := groupsAsked
-	groupsAsked = func(context.Context, bool) ([]groupsLine, error) { return answer, answerErr }
-	t.Cleanup(func() { groupsAsked = was })
-	p := link.PullUpdated{Owner: "novox", Repo: "mesh-controller", Number: 346, Base: "main", Head: "feat/x", Commit: headController,
-		Paths: []string{"main.go"}, ModuleDirsSaid: true, MergeCheck: true, MergeCheckSaid: true}
-	if err := (following{open: open, oneShot: true}).PullUpdated(ctx, p); err != nil {
-		t.Fatal(err)
-	}
-	q, err := link.ReadQueue(ctx, js, link.TheBuildMachine)
-	if err != nil || len(q.Asks) != 1 {
-		t.Fatalf("asks %d: %v", len(q.Asks), err)
-	}
-	return *q.Asks[0].Request.Check
-}
-
-func TestAComposedMembersCheckIsItsRepositoryChecksAlone(t *testing.T) {
-	line := group("feat/x", member("novox/mesh-controller", 346, headController, "main", true), member("novox/mesh-catalog", 350, headHost, "main", true))
-	line.ComposedGate = true
-	c := askedForMember(t, []groupsLine{line}, nil)
-	if len(c.Modules) != 0 || len(c.New) != 0 || len(c.Dependents) != 0 || !c.Composed {
-		t.Fatalf("the member's check is asked as %+v; want no module and composed", c)
-	}
-}
-
-func TestAMemberOfAGroupOfAnOlderMeshDeliveryKeepsItsOwnGate(t *testing.T) {
-	line := group("feat/x", member("novox/mesh-controller", 346, headController, "main", true), member("novox/mesh-catalog", 350, headHost, "main", true))
-	c := askedForMember(t, []groupsLine{line}, nil)
-	if !strings.Contains(strings.Join(c.Modules, ","), "mesh-controller") || c.Composed {
-		t.Fatalf("an older mesh-delivery's member is asked as %+v; want its own gate", c)
-	}
-}
-
-func TestAMemberWhoseGroupCannotBeLearnedIsCheckedAloneWithItsGate(t *testing.T) {
-	c := askedForMember(t, nil, context.DeadlineExceeded)
-	if !strings.Contains(strings.Join(c.Modules, ","), "mesh-controller") || c.Composed ||
-		!strings.Contains(c.SiblingsUnknown, "reads no siblings") {
-		t.Fatalf("the member is asked as %+v; want its gate and why its siblings are unknown", c)
-	}
-}

cmd/mesh-controller/composed_verdict_test.go

@@ -1,136 +0,0 @@
-package main
-
-import (
-	"context"
-	"encoding/json"
-	"strings"
-	"testing"
-
-	"git.novox.be/novox/mesh-sdk/go/catalogue"
-	"github.com/novox/mesh-controller/internal/inventory"
-	"github.com/novox/mesh-controller/internal/link"
-)
-
-// A delivery group's gate is the composed check's, and its members' own checks run their repository's check alone
-// (novox/hq ADR 0403 clauses 1 and 7). Pure: no store, no bus.
-
-// A member of a group whose line says composed_gate is a composed member; one whose group says nothing of it (an older
-// mesh-delivery), one of a group of a single pull request and a lone pull request are not.
-func TestAMemberOfAComposedGroupIsKnownByTheGroupsLine(t *testing.T) {
-	two := func(composed bool) groupsLine {
-		l := group("feat/x", member("novox/mesh-host", 114, headHost, "main", true), member("novox/mesh-controller", 346, headController, "main", true))
-		l.ComposedGate = composed
-		return l
-	}
-	p := link.PullUpdated{Owner: "novox", Repo: "mesh-host", Number: 114, Base: "main", Head: "feat/x", Commit: headHost}
-	recheck := link.PullUpdated{Owner: "novox", Repo: "mesh-host", Number: 114, Base: "main", Commit: headHost}
-	for name, c := range map[string]struct {
-		p     link.PullUpdated
-		lines []groupsLine
-		want  bool
-	}{
-		"composed":                 {p, []groupsLine{two(true)}, true},
-		"a recheck, by its number": {recheck, []groupsLine{two(true)}, true},
-		"an older mesh-delivery":   {p, []groupsLine{two(false)}, false},
-		"another group":            {p, []groupsLine{group("feat/y", member("novox/mesh-host", 1, headHost, "main", true))}, false},
-		"no group":                 {p, nil, false},
-	} {
-		if got := composedMember(c.p, c.lines); got != c.want {
-			t.Errorf("%s: composed %v, want %v", name, got, c.want)
-		}
-	}
-	alone := group("feat/x", member("novox/mesh-host", 114, headHost, "main", true))
-	alone.ComposedGate = true
-	if composedMember(p, []groupsLine{alone}) {
-		t.Error("a group of a single pull request is composed")
-	}
-}
-
-// A composed member's verdict never says its gate passed: the gate layer, and the verdict that is the gate's, read
-// "composed"; a failure or an error stays what it was.
-func TestAComposedMembersVerdictHasNoPassingGate(t *testing.T) {
-	asked := &link.CheckRequest{Owner: "novox", Repo: "mesh-host", Number: 114, Composed: true}
-	pass := link.BuildResult{ID: "b", Ref: headHost, Checked: asked, Check: &link.CheckOutcome{Verdict: "pass", Summary: "no module touched",
-		Gate: &link.CheckLayer{Verdict: "pass", Summary: "no module touched"}, RepoCheck: &link.CheckLayer{Verdict: "pass", Summary: "ok"}}}
-	c := checkedOf(pass)
-	if c.Gate == nil || c.Gate.Verdict != "composed" || c.Verdict != "composed" || c.RepoCheck == nil || c.RepoCheck.Verdict != "pass" {
-		t.Fatalf("the member's verdict says %+v gate %+v", c, c.Gate)
-	}
-	asked.Composed = false
-	if c := checkedOf(pass); c.Gate.Verdict != "pass" || c.Verdict != "pass" {
-		t.Fatalf("a member of no composed group has its own gate: %+v", c.Gate)
-	}
-	asked.Composed = true
-	failing := pass
-	failing.Check = &link.CheckOutcome{Verdict: "fail", Summary: "conflict", Gate: &link.CheckLayer{Verdict: "fail", Summary: "conflict"},
-		RepoCheck: &link.CheckLayer{Verdict: "fail", Summary: "conflict"}}
-	if c := checkedOf(failing); c.Gate.Verdict != "fail" || c.Verdict != "fail" {
-		t.Fatalf("a failure was read as composed: %+v", c.Gate)
-	}
-	broken := link.BuildResult{ID: "b", Ref: headHost, Checked: asked, Failed: "the facts snapshot cannot be read"}
-	if c := checkedOf(broken); c.Verdict != "error" || c.Gate.Verdict != "error" {
-		t.Fatalf("an error was read as composed: %+v", c)
-	}
-}
-
-// The composed verdict on the bus carries every member, each with its trunk commit, for the forge's holder to set each
-// member's mesh/merge-gate from it.
-func TestTheComposedVerdictCarriesEveryMember(t *testing.T) {
-	asked := &link.CheckRequest{Owner: "novox", Repo: "mesh-host", Number: 114, Group: "feat/x",
-		Members: []link.GroupMember{{Owner: "novox", Repo: "mesh-controller", Number: 346, Ref: headController}}}
-	c := checkedOf(link.BuildResult{ID: "g", Ref: headHost, Checked: asked, Check: &link.CheckOutcome{Verdict: "pass", Summary: "ok",
-		Trunk: "aaaaaaaaaaaa", Members: []link.CheckedMember{{Owner: "novox", Repo: "mesh-controller", Commit: headController[:12], Trunk: "bbbbbbbbbbbb"}}}})
-	body, _ := json.Marshal(c)
-	for _, want := range []string{`"group":"feat/x"`, `"members":[{"owner":"novox","repo":"mesh-host","number":114,"commit":"` + headHost + `","trunk":"aaaaaaaaaaaa"}`,
-		`{"owner":"novox","repo":"mesh-controller","number":346,"commit":"` + headController + `","trunk":"bbbbbbbbbbbb"}`} {
-		if !strings.Contains(string(body), want) {
-			t.Fatalf("the composed verdict lacks %s:\n%s", want, body)
-		}
-	}
-}
-
-// Members whose manifests order their modules in a cycle fail the composed check, naming every module and edge, and no
-// ask is made of the build seat.
-func TestAGroupInACycleFailsItsComposedCheckWithoutABuild(t *testing.T) {
-	members := []orderMember{
-		{ID: "novox/x@" + headHost[:12], Repository: "novox/x", Base: "main", Head: headHost, Number: 7, Paths: []string{"module.json"}},
-		{ID: "novox/y@" + headController[:12], Repository: "novox/y", Base: "main", Head: headController, Number: 9, Paths: []string{"module.json"}},
-	}
-	reach := map[string]orderReach{members[0].ID: {Moved: []string{"mx"}}, members[1].ID: {Moved: []string{"my"}}}
-	was, wasParent := manifestAt, parentOf
-	t.Cleanup(func() { manifestAt, parentOf = was, wasParent })
-	parentOf = func(context.Context, string, string, string) (string, error) { return "", nil }
-	manifestAt = func(_ context.Context, _, repo, _, ref string) (catalogue.Manifest, bool, error) {
-		if ref == "main" {
-			return catalogue.Manifest{}, false, nil // what the pull requests merge into holds no such manifest
-		}
-		if repo == "x" {
-			return catalogue.Manifest{Module: "mx", DefinesSeats: []catalogue.SeatDeclaration{{Name: "s", Serves: []catalogue.Verb{{Name: "a"}}}},
-				Invokes: []string{"seat:s.b"}}, true, nil
-		}
-		return catalogue.Manifest{Module: "my", DefinesSeats: []catalogue.SeatDeclaration{{Name: "s", Serves: []catalogue.Verb{{Name: "b"}}}},
-			Invokes: []string{"seat:s.a"}}, true, nil
-	}
-	c, cyclic, err := cycleVerdict(context.Background(), "feat/cycle", members, reach, []inventory.Edge(nil), nil)
-	if err != nil || !cyclic {
-		t.Fatalf("no cycle found: %v", err)
-	}
-	if c.Verdict != "fail" || c.Group != "feat/cycle" || len(c.Members) != 2 || c.Gate == nil || c.Gate.Verdict != "fail" {
-		t.Fatalf("the verdict is %+v", c)
-	}
-	for _, w := range []string{"mx", "my", "s.a", "s.b"} {
-		if !strings.Contains(c.Summary, w) {
-			t.Errorf("the cycle does not name %s: %s", w, c.Summary)
-		}
-	}
-	// Members with no edge between them are no cycle.
-	manifestsReadMu.Lock()
-	clear(manifestsRead)
-	manifestsReadMu.Unlock()
-	manifestAt = func(context.Context, string, string, string, string) (catalogue.Manifest, bool, error) {
-		return catalogue.Manifest{}, false, nil
-	}
-	if _, cyclic, err := cycleVerdict(context.Background(), "feat/cycle", members, reach, nil, nil); err != nil || cyclic {
-		t.Fatalf("a cycle where there is none: %v %v", cyclic, err)
-	}
-}

cmd/mesh-controller/declared_packages_integration_test.go

@@ -0,0 +1,89 @@
+//go:build integration
+
+package main
+
+import (
+	"encoding/json"
+	"testing"
+
+	"git.novox.be/novox/mesh-sdk/go/catalogue"
+	"github.com/novox/mesh-controller/internal/inventory"
+)
+
+// 1840/AC5 (ADR 0507 §5): the source of the declared-packages mirror composes each node and names, for a package two modules
+// declare and one declared absent, the modules that declare it; the same records give the same bytes on a second pass, so
+// the mirror writes nothing; a node with no package has a key that says so.
+func TestTheDeclaredPackagesMirrorNamesWhatEachNodesModulesDeclare(t *testing.T) {
+	open := aMesh(t)
+	ctx := t.Context()
+	register(t, open, catalogue.Manifest{Module: "viewer", Version: "1", Resources: []map[string]any{
+		{"id": "pkg-curl", "type": "package", "package": "curl"},
+		{"id": "pkg-nano", "type": "package", "package": "nano", "absent": true}}})
+	register(t, open, catalogue.Manifest{Module: "fetcher", Version: "1", Resources: []map[string]any{
+		{"id": "pkg-curl", "type": "package", "package": "curl"}}})
+	for _, module := range []string{"viewer", "fetcher"} {
+		if _, err := assign(ctx, open, "anchor", module); err != nil {
+			t.Fatalf("assign anchor %s: %v", module, err)
+		}
+	}
+	source := declaredPackagesMirror(open)
+	first, err := source(ctx)
+	if err != nil {
+		t.Fatal(err)
+	}
+	var got inventory.DeclaredPackagesMirrored
+	if err := json.Unmarshal(first["anchor"], &got); err != nil {
+		t.Fatalf("anchor has no value: %v", err)
+	}
+	// Every node also runs the mesh's own modules, which declare packages of their own: curl and nano are looked
+	// up by name, and no package names viewer or fetcher but those they declare.
+	byName := map[string]inventory.PackageDeclared{}
+	for _, p := range got.Packages {
+		byName[p.Package] = p
+	}
+	same := func(a, b []string) bool {
+		if len(a) != len(b) {
+			return false
+		}
+		for i := range a {
+			if a[i] != b[i] {
+				return false
+			}
+		}
+		return true
+	}
+	for _, p := range []inventory.PackageDeclared{{Package: "curl", Modules: []string{"fetcher", "viewer"}},
+		{Package: "nano", Modules: []string{"viewer"}, Absent: true}} {
+		if g, ok := byName[p.Package]; !ok || g.Absent != p.Absent || !same(g.Modules, p.Modules) {
+			t.Errorf("anchor declares %s as %+v, want %+v (all: %+v)", p.Package, g, p, got.Packages)
+		}
+	}
+	for _, p := range got.Packages {
+		if p.Package == "curl" || p.Package == "nano" {
+			continue
+		}
+		for _, m := range p.Modules {
+			if m == "viewer" || m == "fetcher" {
+				t.Errorf("%s is said to be declared by %s, which does not declare it", p.Package, m)
+			}
+		}
+	}
+	var laptop inventory.DeclaredPackagesMirrored
+	if err := json.Unmarshal(first["laptop"], &laptop); err != nil || laptop.Node != "laptop" || laptop.Packages == nil {
+		t.Errorf("a node assigned neither module has no value of its own: %s (%v)", first["laptop"], err)
+	}
+	for _, p := range laptop.Packages {
+		if p.Package == "curl" || p.Package == "nano" {
+			t.Errorf("laptop is assigned neither module and declares %+v", p)
+		}
+	}
+	second, err := source(ctx)
+	if err != nil {
+		t.Fatal(err)
+	}
+	for node, value := range first {
+		if string(second[node]) != string(value) {
+			t.Errorf("the value of %s changed between two passes over the same records:\n%s\n%s", node, value, second[node])
+		}
+	}
+}

cmd/mesh-controller/delivery.go

@@ -815,20 +815,21 @@ func deliveryPlanDocument(m orderMember, entries []inventory.Entry, read map[str
 //	delivery walks [-n 50] [--plan <id>]
 func deliveryCommand(ctx context.Context, args []string) error {
 	if len(args) == 0 {
-		return errors.New("delivery plan|order|check|go|stop|walks")
+		return errors.New("delivery order|go|stop|walks")
 	}
 	sub, rest := args[0], args[1:]
+	if sub == "plan" {
+		// Removed (ADR 0450 §8; issue 1318): refused by name before any flag is read, naming its replacement.
+		return removedByName("delivery-plan")
+	}
+	if sub == "check" {
+		// Removed (ADR 0503 §3, ADR 0527; issue 1318): the checker judges every head, so the controller asks nothing.
+		return removedByName("delivery-check")
+	}
 	set := flag.NewFlagSet("delivery "+sub, flag.ContinueOnError)
-	repository := set.String("repository", "", "owner/repository")
-	base := set.String("base", "main", "the branch it merges into")
-	head := set.String("head", "", "the commit at hand")
-	paths := set.String("paths", "", "the files it changes, comma-separated")
-	moduleDirs := set.String("module-dirs", "", "the directories holding a module.json at the head, comma-separated")
-	removed := set.String("removed", "", "the files it deletes, comma-separated")
 	membersJSON := set.String("members", "", "a group's members, as JSON")
 	membersFile := set.String("members-file", "", "a file of a group's members, as JSON: the same as --members, for a list "+
 		"too long for an argument (novox/hq issue 1272)")
-	group := set.String("group", "", "a delivery group's id")
 	ready := set.Bool("ready", false, "the head's pull request is marked ready: its check is queued before every other check "+
 		"(novox/hq ADR 0406 §3)")
 	by := set.String("by", catalogue.DeliverySeat, "who says it")
@@ -872,19 +873,6 @@ func deliveryCommand(ctx context.Context, args []string) error {
 		return enc.Encode(v)
 	}
 	switch sub {
-	case "plan":
-		if *repository == "" || *head == "" && *paths == "" {
-			return errors.New("delivery plan --repository owner/repo --head <commit> --paths a,b")
-		}
-		m := changeMember(*repository, *base, *head, splitList(*paths), splitList(*removed), moduleDirsOf(*moduleDirs))
-		entries, read, edges, err := theGraph(ctx, inv)
-		if err != nil {
-			return err
-		}
-		return answer(deliveryPlanDocument(m, entries, read, edges, func(module string) (inventory.Upgrade, bool) {
-			u, err := inv.UpgradeOf(ctx, module)
-			return u, err == nil
-		}))
 	case "order":
 		if len(members) == 0 {
 			return errors.New("delivery order --members <json>: a group has members")
@@ -898,27 +886,6 @@ func deliveryCommand(ctx context.Context, args []string) error {
 			return fmt.Errorf("what the members say of their manifests cannot be read: %w", err)
 		}
 		return answer(orderOf(members, reachOfMembers(members, entries, read, edges), edges, changes))
-	case "check":
-		if *group == "" && len(members) == 1 {
-			// One head, checked again as the forge's announcement would have it (a recheck): the controller's
-			// own path for a pull request, run because the delivery's owner asked.
-			return recheckOneHead(members[0].ID, answer, func() (string, error) {
-				var asked string
-				err := sayingOnTheBus(ctx, inv, func() (err error) {
-					asked, err = (following{open: open, oneShot: true}).pullUpdated(ctx, members[0].pull(), os.Stderr)
-					return err
-				})
-				return asked, err
-			})
-		}
-		if *group == "" || len(members) < 2 {
-			return errors.New("delivery check --group <id> --members <json> (two heads or more), or --members <one head>")
-		}
-		id, err := askGroupCheck(ctx, open, *group, members)
-		if err != nil {
-			return err
-		}
-		return answer(map[string]any{"asked": id, "group": *group})
 	case "go":
 		if len(positionals) != 1 {
 			return errors.New("delivery go <plan> [--by <who>] [--why <text>]")
@@ -1093,133 +1060,6 @@ func theGraph(ctx context.Context, inv *inventory.Inventory) ([]inventory.Entry,
 	return entries, read, edges, nil
 }
 
-// cycleVerdict is the failing verdict of a group whose modules are ordered in a cycle, and whether there is one: the
-// group's composed check, said without a build. The manifests' change is read from the forge; an answer it cannot give
-// is an error, never read as no cycle.
-func cycleVerdict(ctx context.Context, group string, members []orderMember, reach map[string]orderReach,
-	edges []inventory.Edge, entries []inventory.Entry) (link.Checked, bool, error) {
-	changes, err := changesOf(ctx, changeSourcesOf(members, entries, reach))
-	if err != nil {
-		return link.Checked{}, false, fmt.Errorf("what the group's members say of their manifests cannot be read: %w", err)
-	}
-	var moved []string
-	for _, m := range members {
-		moved = appendNew(moved, reach[m.ID].Moved...)
-	}
-	said := orderEdges(moved, changes, edges).CycleSaid()
-	if said == "" {
-		return link.Checked{}, false, nil
-	}
-	first := members[0].pull()
-	c := link.Checked{ID: link.NewBuildID(time.Now()), Owner: first.Owner, Repo: first.Repo, Number: first.Number,
-		Commit: first.Commit, Verdict: "fail", Summary: said, Report: said, Group: group,
-		Gate: &link.CheckLayer{Verdict: "fail", Summary: said}}
-	for _, m := range members {
-		if group == "" {
-			break // a lone pull request's verdict names no group and no member
-		}
-		p := m.pull()
-		c.Members = append(c.Members, link.CheckedMember{Owner: p.Owner, Repo: p.Repo, Number: p.Number, Commit: p.Commit,
-			Trunk: twelve(p.BaseSHA)})
-	}
-	return c, true, nil
-}
-
-// twelve is a commit as twelve characters.
-func twelve(c string) string {
-	if len(c) > 12 {
-		return c[:12]
-	}
-	return c
-}
-
-// groupPrimary is the head a group's composed check is run from: the one moving the controller, which then
-// judges the group by itself; else the one moving the node-engine, whose validator judges; else the first.
-func groupPrimary(members []orderMember, reach map[string]orderReach) int {
-	for _, want := range []string{"mesh-controller", "mesh-host"} {
-		for i, m := range members {
-			if slices.Contains(reach[m.ID].Moved, want) {
-				return i
-			}
-		}
-	}
-	return 0
-}
-
-// askGroupCheck asks the build seat for a group's composed check: every head laid over the mesh in turn,
-// judged as one future state (novox/hq ADR 0239). The verdict comes back as `checked` with the group's id,
-// for mesh-delivery; the forge's holder sets no status from it.
-func askGroupCheck(ctx context.Context, open *stores, group string, members []orderMember) (string, error) {
-	entries, read, edges, err := theGraph(ctx, open.inventory)
-	if err != nil {
-		return "", err
-	}
-	reach := reachOfMembers(members, entries, read, edges)
-	// **A cycle of edges fails the group's composed check, naming every module and edge** (novox/hq ADR 0419 clause 6),
-	// before the build seat is asked: no composition of the heads has an order to be sent in.
-	if failing, cyclic, err := cycleVerdict(ctx, group, members, reach, edges, entries); err != nil {
-		return "", err
-	} else if cyclic {
-		sayChecked(ctx, os.Stderr, failing)
-		return failing.ID, nil
-	}
-	primary := groupPrimary(members, reach)
-	p := members[primary].pull()
-	scope := pullScope(p, entries, read, edges)
-	// The gate runs over what any member moves; a judge from the primary alone.
-	for _, m := range members {
-		r := reach[m.ID]
-		scope.Modules = appendNew(scope.Modules, r.Moved...)
-		scope.Dependents = appendNew(scope.Dependents, r.Dependents...)
-	}
-	request, err := checkRequestFor(ctx, open, p, scope, entries)
-	if err != nil {
-		return "", err
-	}
-	request.Check.Group = group
-	// A group's check is queued as ready when any member's pull request is marked ready.
-	request.Check.Ready = slices.ContainsFunc(members, func(m orderMember) bool { return m.Ready })
-	world, err := restOfTheMesh(ctx, open, shelfOf(entries), "")
-	if err != nil {
-		return "", err
-	}
-	for i, m := range members {
-		if i == primary {
-			continue
-		}
-		mp := m.pull()
-		// As the mesh clones a module built from it; a repository no module is built from, from the forge.
-		source := inventory.Source{Seat: gitSeat, Repository: mp.Owner + "/" + mp.Repo}
-		for _, e := range entries {
-			if !e.Provided && sameRepository(e.Source.Repository, link.SourceMoved{Owner: mp.Owner, Repo: mp.Repo}) {
-				source = e.Source
-				break
-			}
-		}
-		url := source.Repository
-		if source.Seat != "" {
-			url, err = clonedFromSeat(world, source.Seat, source.Repository)
-		}
-		if err != nil {
-			return "", fmt.Errorf("%s cannot be cloned for the group's check: %w", m.ID, err)
-		}
-		request.Check.Members = append(request.Check.Members, link.GroupMember{Owner: mp.Owner, Repo: mp.Repo,
-			Number: mp.Number, Repository: url, Ref: mp.Commit, Paths: mp.Paths, Base: mp.Base})
-	}
-	seat := buildSeatHeld(ctx)
-	ask, err := askOverOn(seat)
-	if err != nil {
-		return "", err
-	}
-	defer ask.Close()
-	if err := ask.Ask(ctx, request); err != nil {
-		return "", err
-	}
-	fmt.Fprintf(os.Stderr, "group %s: asked %s to check %d head(s) composed together, as %s\n", group, seat,
-		len(members), request.ID)
-	return request.ID, nil
-}
-
 // appendNew appends what is not there yet.
 func appendNew(to []string, items ...string) []string {
 	for _, i := range items {
@@ -1230,15 +1070,6 @@ func appendNew(to []string, items ...string) []string {
 	return to
 }
 
-// shelfOf is the catalogue's manifests by name.
-func shelfOf(entries []inventory.Entry) map[string]catalogue.Manifest {
-	shelf := map[string]catalogue.Manifest{}
-	for _, e := range entries {
-		shelf[e.Manifest.Module] = e.Manifest
-	}
-	return shelf
-}
-
 // sayPlanMoved says a walk kept in a new state as the controller's `plan-moved`, the plan whole: what the
 // delivery it walks reads its steps from. Never in the way of the walk: said beside it, and a save that could
 // not be said is logged — the delivery's owner, which also asks for the walks it follows, finds it by
@@ -1380,25 +1211,3 @@ func overNATS(conn *nats.Conn) (link.Bus, error) {
 	}
 	return link.OverNATS{Conn: conn, JS: js}, nil
 }
-
-// recheckAnswer is what `delivery check` answers for one head: the id of the check asked of the build seat (empty when
-// the controller said the verdict itself and asked nothing), which mesh-delivery reads, and the head rechecked.
-func recheckAnswer(asked, member string) map[string]any {
-	return map[string]any{"asked": asked, "rechecked": member}
-}
-
-// recheckOneHead runs a one-head `delivery check` and answers it as data. Standard output is the answer's JSON alone,
-// or the seat verb reads no answer from it (novox/hq issue 1311): while the check runs, whatever it prints to standard
-// output (the controller's own path prints its prose there, as do the stores it reads) goes to standard error.
-func recheckOneHead(member string, answer func(any) error, ask func() (string, error)) error {
-	real := os.Stdout
-	os.Stdout = os.Stderr
-	asked, err := func() (string, error) {
-		defer func() { os.Stdout = real }()
-		return ask()
-	}()
-	if err != nil {
-		return err
-	}
-	return answer(recheckAnswer(asked, member))
-}

cmd/mesh-controller/delivery_check_answer_test.go

@@ -1,85 +0,0 @@
-package main
-
-import (
-	"bytes"
-	"context"
-	"encoding/json"
-	"fmt"
-	"os"
-	"strings"
-	"testing"
-
-	"github.com/novox/mesh-controller/internal/link"
-)
-
-// `delivery check` with one head answers the id of the check it asked, as data (novox/hq issue 1311): the prose
-// the check says goes to standard error, so standard output is the document alone and answerOf reads it.
-func TestDeliveryCheckOfOneHeadAnswersTheRequestID(t *testing.T) {
-	argv := []string{"delivery", "check", "--members", "[]"}
-	doc, err := json.Marshal(recheckAnswer("check-42", "novox/x@abc"))
-	if err != nil {
-		t.Fatal(err)
-	}
-	// Seen failing first: the prose the command used to print on standard output before the document.
-	polluted := append([]byte("novox/x#7 (abc): asked the build seat as check-42\n"), doc...)
-	if got := answerOf(argv, polluted, "", true); got.Answer != nil {
-		t.Fatalf("prose before the document should leave no answer; got %v", got.Answer)
-	}
-	got := answerOf(argv, doc, "novox/x#7 (abc): asked the build seat as check-42\n", true)
-	m, ok := got.Answer.(map[string]any)
-	if !ok || m["asked"] != "check-42" || m["rechecked"] != "novox/x@abc" {
-		t.Fatalf("the answer is %v; want asked check-42 and rechecked novox/x@abc", got.Answer)
-	}
-	if !strings.Contains(got.Output, "asked the build seat") {
-		t.Fatalf("the prose is still said in the text: %q", got.Output)
-	}
-}
-
-// The text of the other callers does not change: sayChecked writes the same line to the writer it is given, and
-// the controller's own path still gives PullUpdated standard output.
-func TestSayCheckedWritesTheSameLineToItsWriter(t *testing.T) {
-	var w bytes.Buffer
-	sayChecked(context.Background(), &w, link.Checked{ID: "c1", Owner: "novox", Repo: "x", Number: 7, Commit: "0123456789abcdef",
-		Verdict: "pass", Summary: "fine"})
-	want := "c1: novox/x#7 at 01234567 checked on a machine that did not say which: gate PASS — fine; repository none\n"
-	if w.String() != want {
-		t.Fatalf("sayChecked said %q; want %q", w.String(), want)
-	}
-}
-
-// Whatever the check prints to standard output while it runs (checks.go namedForTheCheck, the inventory's pointer
-// repair) must not reach the answer's standard output: it is exactly one JSON document (novox/hq issue 1311).
-func TestOneHeadRecheckLeavesStandardOutputTheAnswerAlone(t *testing.T) {
-	r, w, err := os.Pipe()
-	if err != nil {
-		t.Fatal(err)
-	}
-	e, ew, err := os.Pipe()
-	if err != nil {
-		t.Fatal(err)
-	}
-	realOut, realErr := os.Stdout, os.Stderr
-	os.Stdout, os.Stderr = w, ew
-	runErr := recheckOneHead("novox/x@abc", func(v any) error { return json.NewEncoder(os.Stdout).Encode(v) },
-		func() (string, error) {
-			fmt.Println("  the earlier checks' builds could not be read, so the check builds")
-			fmt.Fprintln(os.Stdout, "repaired a pointer")
-			return "check-42", nil
-		})
-	os.Stdout, os.Stderr = realOut, realErr
-	w.Close()
-	ew.Close()
-	if runErr != nil {
-		t.Fatal(runErr)
-	}
-	var out, errOut bytes.Buffer
-	_, _ = out.ReadFrom(r)
-	_, _ = errOut.ReadFrom(e)
-	var doc map[string]any
-	if err := json.Unmarshal(out.Bytes(), &doc); err != nil || doc["asked"] != "check-42" || doc["rechecked"] != "novox/x@abc" {
-		t.Fatalf("standard output %q is not the answer alone (%v)", out.String(), err)
-	}
-	if !strings.Contains(errOut.String(), "repaired a pointer") {
-		t.Fatalf("the prose should be on standard error: %q", errOut.String())
-	}
-}

cmd/mesh-controller/delivery_conditions.go

@@ -41,7 +41,7 @@ type stalledLine struct {
 	// waiting for the owner's word and what holds it (novox/hq issues 362, 529).
 	Walk string `json:"walk,omitempty"`
 	// Waiting are the merge checks a line of the state `unanswered` waits on, as mesh-delivery says each:
-	// "mesh/merge-gate pending since <UTC time>", "mesh/repo-check never set" (novox/hq issue 438).
+	// "mesh/check pending since <UTC time>", "mesh/check never set" (novox/hq issue 438).
 	Waiting []string `json:"waiting,omitempty"`
 	// Checks are the same merge checks as data, which the controller words in the operator's own time (novox/hq
 	// issue 443): a time inside a finished sentence cannot be said again in another zone. A mesh-delivery from before
@@ -58,8 +58,17 @@ type stalledLine struct {
 	// Severity is "urgent" for a group held or half merged and a refused member (novox/hq issues 1275, 1278); empty
 	// or anything else is a warning, as before.
 	Severity string `json:"severity,omitempty"`
+	// Needs is "new-head" for a delivery whose cure is its author's new head (novox/hq ADR 0505 §5), Author that author
+	// as the operator reads it ("the author of feat/x", with the session that pushed it when its pull request names one)
+	// and Branch its branch. A mesh-delivery from before says none, and the words are as before.
+	Needs  string `json:"needs,omitempty"`
+	Author string `json:"author,omitempty"`
+	Branch string `json:"branch,omitempty"`
 }
 
+// needsNewHead is what a stalled line needs when its cure is its author's new head (ADR 0505 §5).
+const needsNewHead = "new-head"
+
 // severity is the condition's severity a stalled line asks: urgent when it says so, a warning otherwise.
 func (l stalledLine) severity() conditions.Severity {
 	if l.Severity == string(conditions.Urgent) {

cmd/mesh-controller/delivery_edges_test.go

@@ -181,32 +181,3 @@ func TestATruncatedChangeIsReadAsChangingTheManifestsOfWhatItMoves(t *testing.T)
 		t.Fatalf("the member's change is read as %+v", src)
 	}
 }
-
-// A lone pull request's cycle fails its check, naming every module and edge, with no group and no members.
-func TestALonePullRequestInACycleFailsWithNoGroup(t *testing.T) {
-	was, wasParent := manifestAt, parentOf
-	t.Cleanup(func() { manifestAt, parentOf = was, wasParent })
-	manifestsReadMu.Lock()
-	clear(manifestsRead)
-	manifestsReadMu.Unlock()
-	const head = "3333333333333333333333333333333333333333"
-	parentOf = func(context.Context, string, string, string) (string, error) { return "", nil }
-	manifestAt = func(_ context.Context, _, _, file, ref string) (catalogue.Manifest, bool, error) {
-		if ref == "main" {
-			return catalogue.Manifest{}, false, nil
-		}
-		if file == "modules/x/module.json" {
-			return catalogue.Manifest{Module: "mx", DefinesSeats: []catalogue.SeatDeclaration{{Name: "s", Serves: []catalogue.Verb{{Name: "a"}}}},
-				Invokes: []string{"seat:s.b"}}, true, nil
-		}
-		return catalogue.Manifest{Module: "my", DefinesSeats: []catalogue.SeatDeclaration{{Name: "s", Serves: []catalogue.Verb{{Name: "b"}}}},
-			Invokes: []string{"seat:s.a"}}, true, nil
-	}
-	m := orderMember{ID: "novox/r@" + head[:12], Repository: "novox/r", Base: "main", Head: head, Number: 5,
-		Paths: []string{"modules/x/module.json", "modules/y/module.json"}}
-	c, cyclic, err := cycleVerdict(context.Background(), "", []orderMember{m}, map[string]orderReach{m.ID: {Moved: []string{"mx", "my"}}}, nil, nil)
-	if err != nil || !cyclic || c.Verdict != "fail" || c.Group != "" || len(c.Members) != 0 || !strings.Contains(c.Summary, "s.a") ||
-		!strings.Contains(c.Summary, "my") {
-		t.Fatalf("the verdict is %+v (cyclic %v, %v)", c, cyclic, err)
-	}
-}

cmd/mesh-controller/delivery_integration_test.go

@@ -59,6 +59,18 @@ func TestAMergeWaitsForItsDeliverysWordAndThePersonsWordWorksWithoutIt(t *testin
 		}
 	}
 
+	// heardOf has this mesh's own view of the plans take in the plan as the bucket holds it. A verb of the
+	// controller (deliveryCommand, plansCommand) opens an inventory of its own and writes the plan there; this
+	// mesh's inventory learns of the write from the bucket's watch, a moment later, and a loaded machine makes the
+	// moment long enough for advanceHeld to read the plan as it was, still waiting for its word, and ask nothing
+	// (issue 1399). Reading the plan from the bucket puts it into the view at once, with no wait to bound.
+	heardOf := func(id string) {
+		t.Helper()
+		if _, err := inv.PlanByID(ctx, id); err != nil {
+			t.Fatal(err)
+		}
+	}
+
 	// No holder on record: the merge starts its walk, as before.
 	p := merge("c1aaaaaaaa", "modules/app/index.ts")
 	if p.Waiting() || len(*asked) != 1 {
@@ -90,6 +102,7 @@ func TestAMergeWaitsForItsDeliverysWordAndThePersonsWordWorksWithoutIt(t *testin
 	if err := deliveryCommand(ctx, []string{"go", p.ID}); err == nil {
 		t.Fatal("a walk was let go twice")
 	}
+	heardOf(p.ID)
 	advanceHeld(ctx, open)
 	if len(*asked) != 2 {
 		t.Fatalf("the word did not start the walk: %v", *asked)
@@ -119,6 +132,7 @@ func TestAMergeWaitsForItsDeliverysWordAndThePersonsWordWorksWithoutIt(t *testin
 	if err := plansCommand(ctx, []string{"go", p.ID, "--why", "mesh-delivery is down"}); err != nil {
 		t.Fatal(err)
 	}
+	heardOf(p.ID)
 	advanceHeld(ctx, open)
 	got, _ = inv.PlanByID(ctx, p.ID)
 	if got.Waiting() || !strings.HasPrefix(got.Delivery.By, "a person") || len(*asked) < 4 {

cmd/mesh-controller/delivery_test.go

@@ -136,10 +136,6 @@ func TestTheDeliveryVerbsComposeTheirCommands(t *testing.T) {
 		{"delivery-walks", map[string]any{}, []string{"delivery", "walks"}},
 		{"delivery-walks", map[string]any{"plan": "plan-1"}, []string{"delivery", "walks", "--plan", "plan-1"}},
 		{"delivery-order", map[string]any{"members": "[]"}, []string{"delivery", "order", "--members", "[]"}},
-		{"delivery-check", map[string]any{"group": "feat/x", "members": "[]"},
-			[]string{"delivery", "check", "--group", "feat/x", "--members", "[]"}},
-		{"delivery-plan", map[string]any{"repository": "novox/a", "paths": "x", "head": "c0"},
-			[]string{"delivery", "plan", "--repository", "novox/a", "--paths", "x", "--head", "c0"}},
 		{"plans", map[string]any{"go": "plan-1", "why": "down"}, []string{"plans", "go", "plan-1", "--why", "down"}},
 	} {
 		got, err := argvFor(c.verb, c.args)

cmd/mesh-controller/dependents_test.go

@@ -35,16 +35,6 @@ func TestAMergeOfABaseTakesWhatStandsOnItAlong(t *testing.T) {
 			t.Fatalf("%s was rebuilt and stands on nothing that moved (%v)", n, names)
 		}
 	}
-	// The dependents come in base order when the merge orders them: the runtime, then shop, then
-	// the plugin that stands on shop.
-	ordered := orderByBases(append([]inventory.Entry{entry("mesh-tools")}, got...), against)
-	pos := map[string]int{}
-	for i, e := range ordered {
-		pos[e.Manifest.Module] = i
-	}
-	if !(pos["mesh-tools"] < pos["shop"] && pos["shop"] < pos["shop-plugin"]) {
-		t.Fatalf("not in base order: %v", ordered)
-	}
 	// Nothing moved: nothing follows.
 	if more := dependentsOf(nil, entries, against); len(more) != 0 {
 		t.Fatalf("with nothing moved, %d module(s) were rebuilt", len(more))

cmd/mesh-controller/doctor.go

@@ -669,7 +669,7 @@ func localDoctor(ctx context.Context) (*doctor, func(), error) {
 	if err != nil {
 		return nil, nil, err
 	}
-	js, err := dialTheBus()
+	js, err := aBus()
 	if err != nil {
 		open.Close()
 		return nil, nil, err

cmd/mesh-controller/dry_run_integration_test.go

@@ -1,20 +0,0 @@
-//go:build integration
-
-package main
-
-import (
-	"encoding/json"
-	"testing"
-
-	"github.com/novox/mesh-controller/internal/link"
-)
-
-func TestADryRunsOutcomeIsTakenInByNothing(t *testing.T) {
-	err := builds{}.Built(t.Context(), link.BuildResult{
-		ID: "build-1", Repository: "ssh://forge/app.git", Ref: "unreviewed", Module: "app", DryRun: true,
-		Manifest: json.RawMessage(`{"module":"app","version":"1"}`),
-	})
-	if err != nil {
-		t.Fatalf("a dry run's outcome was not simply set aside: %v", err)
-	}
-}

cmd/mesh-controller/dry_run_test.go

@@ -1,29 +0,0 @@
-package main
-
-import (
-	"encoding/json"
-	"testing"
-
-	"github.com/novox/mesh-controller/internal/link"
-)
-
-// A dry run's outcome is looked at, never taken in (novox/hq issue 240). The daemon here holds no
-// store at all, so anything that tried to record or register would fail rather than pass quietly.
-
-// The mark survives the wire both ways: asked as a dry run, answered as one.
-func TestTheDryRunMarkTravelsWithTheBuild(t *testing.T) {
-	raw, _ := json.Marshal(link.BuildRequest{ID: "build-1", Repository: "r", DryRun: true})
-	var asked link.BuildRequest
-	if err := json.Unmarshal(raw, &asked); err != nil || !asked.DryRun {
-		t.Fatalf("the request lost its dry-run mark: %s", raw)
-	}
-	raw, _ = json.Marshal(link.BuildResult{ID: "build-1", DryRun: true})
-	var answered link.BuildResult
-	if err := json.Unmarshal(raw, &answered); err != nil || !answered.DryRun {
-		t.Fatalf("the outcome lost its dry-run mark: %s", raw)
-	}
-	raw, _ = json.Marshal(link.BuildResult{ID: "build-2"})
-	if string(raw) != `{"id":"build-2","repository":"","on":""}` {
-		t.Fatalf("an ordinary outcome carries a dry-run mark: %s", raw)
-	}
-}

cmd/mesh-controller/durations.go

@@ -12,7 +12,6 @@ import (
 	"time"
 
 	"github.com/novox/mesh-controller/internal/inventory"
-	"github.com/novox/mesh-controller/internal/link"
 )
 
 // What the core's bounds are set from (novox/hq to-be 45 Phase 0).
@@ -24,25 +23,6 @@ import (
 // controller as it hears each — a send's first report, a machine's next word, a plan leaving a tier, a
 // build's outcome — and summarised here per machine, repository or module.
 
-// recordBuildDuration measures one build from its ask to its outcome heard.
-func recordBuildDuration(ctx context.Context, inv *inventory.Inventory, result link.BuildResult, asked time.Time) {
-	if asked.IsZero() || result.ID == "" {
-		return
-	}
-	subject := result.Module
-	if subject == "" {
-		subject = result.Repository
-	}
-	detail := "built"
-	if result.Failed != "" {
-		detail = "failed: " + firstLine(result.Failed)
-	}
-	if err := inv.RecordDuration(ctx, inventory.Duration{Kind: inventory.DurationBuild, Subject: subject,
-		Node: result.On, Ref: result.ID, Started: asked, Took: time.Since(asked), Detail: detail}); err != nil {
-		fmt.Fprintf(os.Stderr, "%s: how long it took could not be recorded: %v\n", result.ID, err)
-	}
-}
-
 // durationSummary is one subject's measurements of one kind.
 type durationSummary struct {
 	Kind    string `json:"kind"`

cmd/mesh-controller/facts.go

@@ -19,7 +19,6 @@ import (
 	snapshot "git.novox.be/novox/mesh-sdk/go/facts"
 	"github.com/novox/mesh-controller/internal/artifacts"
 	"github.com/novox/mesh-controller/internal/broker"
-	"github.com/novox/mesh-controller/internal/builder"
 	"github.com/novox/mesh-controller/internal/inventory"
 	"github.com/novox/mesh-controller/internal/link"
 )
@@ -241,17 +240,6 @@ func gatherFacts(ctx context.Context, open *stores, busVersion string) (snapshot
 		scrub.Site(o.Site)
 	}
 
-	// What a merge check runs in and reads beside it, as the build seat would be asked for it.
-	if held, err := inv.Held(ctx); err == nil {
-		for language, reference := range builder.ToolchainsOf(held) {
-			if f.Versions.Toolchains == nil {
-				f.Versions.Toolchains = map[string]string{}
-			}
-			f.Versions.Toolchains[language] = catalogue.Recorded(reference)
-		}
-	} else {
-		return snapshot.Facts{}, err
-	}
 	for _, e := range entries {
 		if dir, core := coreModules[e.Manifest.Module]; core && !e.Provided && e.Source.Repository != "" {
 			for d, ref := range besideRefs(dir, current[e.Manifest.Module].Commit) {

cmd/mesh-controller/first_build_ask_integration_test.go

@@ -1,84 +0,0 @@
-//go:build integration
-
-package main
-
-import (
-	"context"
-	"errors"
-	"testing"
-	"time"
-
-	"git.novox.be/novox/mesh-sdk/go/asks"
-	"git.novox.be/novox/mesh-sdk/go/catalogue"
-	"github.com/novox/mesh-controller/internal/broker"
-	"github.com/novox/mesh-controller/internal/identity"
-	"github.com/novox/mesh-controller/internal/link"
-)
-
-// aForgeAndABuildSeat gives a test what a real ask of a build needs: the forge holding the git seat, assigned to anchor, so
-// the clone URL composes; the identity store; the build seat's queue on a real bus; and the environment of the serving controller, which is
-// never the controller's terminal (a verb's, in effect: startedAtTheTerminal is false).
-func aForgeAndABuildSeat(t *testing.T, open *stores) *broker.JetStream {
-	t.Helper()
-	js, _ := aBuildQueue(t)
-	// The ask signs what it sends with the controller's identity, as the serving controller does.
-	identity.ForTest(t)
-	forge, err := catalogue.ParseManifest([]byte(`{"module":"gitea","version":"1",
-	  "claims":[{"name":"git","scope":"mesh"}],"provides":[{"name":"git","scope":"mesh"}],
-	  "serves":{"git":{"scheme":"http","port":3000}}}`))
-	if err != nil {
-		t.Fatal(err)
-	}
-	register(t, open, forge)
-	if _, err := assign(t.Context(), open, "anchor", "gitea"); err != nil {
-		t.Fatal(err)
-	}
-	t.Setenv(servedVar, "1")
-	return js
-}
-
-// 1146/AC9, through the real ask (askABuild, buildOneAsked, verbMayAsk) and a real bus: the first build of a module a
-// merge adds on the operator's Approve is queued on the build seat; the same ask without that warrant, and the warrant's
-// ask for a path the merge does not hold, are refused by the guard of a build through a verb.
-func TestTheApprovedFirstBuildPassesTheGuardOfAVerbAndIsQueued(t *testing.T) {
-	const head, commit = "a1a1a1a1a1a1a1a1a1a1a1a1a1a1a1a1a1a1a1a1", "0177ea7a00000000"
-	open := aMesh(t)
-	ctx := t.Context()
-	js := aForgeAndABuildSeat(t, open)
-
-	a := aDeliveryMergeOf(t, head, map[string]string{"novox/mesh-delivery@a1a1a1a1a1a1": head})
-	wasKept, wasAsk := keptDeliveryMerge, routerAskOf
-	keptDeliveryMerge = func(context.Context, string, string, int, string) (deliveryMerge, bool, error) {
-		return a.merge, true, nil
-	}
-	routerAskOf = func(context.Context, catalogueReader, string, string) (*asks.Ask, *asks.Warrant, error) {
-		return &a.ask, &a.warrant, nil
-	}
-	t.Cleanup(func() { keptDeliveryMerge, routerAskOf = wasKept, wasAsk })
-
-	// Without the warrant the guard refuses, whatever the repository holds.
-	_, err := askABuild(ctx, buildSource{Repository: "novox/mesh-delivery", Seat: "git"}, "", "main")
-	var policy *heldAtTheTerminal
-	if !errors.As(err, &policy) {
-		t.Fatalf("1146/AC9: a first build asked without the warrant was not refused: %v", err)
-	}
-	// And a path the merge does not hold is refused on the warrant.
-	warranted := withFirstBuildWarrant(ctx, "novox/mesh-delivery", []string{""}, "the Approve")
-	if _, err := askABuild(warranted, buildSource{Repository: "novox/mesh-delivery", Seat: "git"}, "other", "main"); !errors.As(err, &policy) {
-		t.Fatalf("1146/AC9: the warrant covered a path the merge does not hold: %v", err)
-	}
-
-	m := link.SourceMoved{Owner: "novox", Repo: "mesh-delivery", Base: "main", HeadSHA: head, Commit: commit, Number: 7,
-		MergedAt: time.Now().Add(-time.Hour).UTC().Format(time.RFC3339Nano), Paths: []string{"module.json", "main.go"},
-		ModuleDirs: []string{"."}, ModuleDirsSaid: true}
-	if err := (following{open: open}).SourceMoved(ctx, m); err != nil {
-		t.Fatal(err)
-	}
-	queue, err := link.ReadQueue(ctx, js, link.TheBuildMachine)
-	if err != nil {
-		t.Fatal(err)
-	}
-	if len(queue.Asks) != 1 {
-		t.Fatalf("1146/AC9: the build queue holds %+v, want the one first build", queue)
-	}
-}

cmd/mesh-controller/first_build_warrant_test.go

@@ -1,29 +0,0 @@
-package main
-
-import "testing"
-
-// 1146/AC9: the warrant the controller checked covers exactly the repository on the git seat and the module paths the
-// merge holds; nothing else passes verbMayAsk on it.
-func TestTheFirstBuildWarrantCoversOnlyItsRepositoryAndItsModulePaths(t *testing.T) {
-	ctx := withFirstBuildWarrant(t.Context(), "novox/mesh-delivery", []string{"", "view"}, "the Approve")
-	w := firstBuildWarrantIn(ctx)
-	for _, c := range []struct {
-		source buildSource
-		path   string
-		covers bool
-	}{
-		{buildSource{Repository: "novox/mesh-delivery", Seat: "git"}, "", true},
-		{buildSource{Repository: "novox/mesh-delivery", Seat: "git"}, "/view/", true},
-		{buildSource{Repository: "novox/mesh-delivery", Seat: "git"}, "other", false},
-		{buildSource{Repository: "agent/mesh-delivery", Seat: "git"}, "", false},
-		{buildSource{Repository: "novox/mesh-delivery"}, "", false},
-		{buildSource{Repository: "novox/mesh-delivery", Seat: "elsewhere"}, "", false},
-	} {
-		if got := w.covers(c.source, c.path); got != c.covers {
-			t.Errorf("1146/AC9: %v at %q covered = %v, want %v", c.source, c.path, got, c.covers)
-		}
-	}
-	if firstBuildWarrantIn(t.Context()).covers(buildSource{Repository: "novox/mesh-delivery", Seat: "git"}, "") {
-		t.Error("1146/AC9: a context with no warrant covers an ask")
-	}
-}

cmd/mesh-controller/first_builds.go

@@ -5,6 +5,7 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
+	"regexp"
 	"strings"
 	"time"
 
@@ -46,7 +47,7 @@ func (f following) firstBuilds(ctx context.Context, m link.SourceMoved, entries
 	case len(added) == 0:
 		return false, nil
 	}
-	if err := askFirstBuilds(ctx, inv, m, now, added, why); err != nil {
+	if err := askFirstBuilds(ctx, f.open, m, now, added, why); err != nil {
 		return true, notNow(err)
 	}
 	return true, nil
@@ -67,27 +68,35 @@ func keepFirstMerge(ctx context.Context, inv *inventory.Inventory, m link.Source
 	return err
 }
 
-// askFirstBuilds keeps the merge, asks the builds, and marks the merge as no longer waiting for them.
-func askFirstBuilds(ctx context.Context, inv *inventory.Inventory, m link.SourceMoved, now time.Time, added []string,
+// askFirstBuilds keeps the merge as answered and registers its modules from the builder's done keys (novox/hq ADR 0501
+// §3, §6): nothing asks their first builds. The merge kept is the registration's warrant (approvedMove reads it by the
+// commit the indexer's trunk value names); a module whose key is not done yet is registered when the key's write wakes
+// the take-in (new_modules.go).
+func askFirstBuilds(ctx context.Context, open *stores, m link.SourceMoved, now time.Time, added []string,
 	why string) error {
+	inv := open.inventory
 	repository := m.Owner + "/" + m.Repo
 	if err := keepFirstMerge(ctx, inv, m, now, false); err != nil {
 		return err
 	}
-	fmt.Printf("%s merged into %s (%.8s) on the operator's Approve (%s): the mesh builds nothing from it yet, so the "+
-		"first build of %s is asked\n", repository, m.Base, m.Commit, why, strings.Join(added, ", "))
-	// The ask carries the warrant just checked, for this repository and these module paths alone: the guard of a build
-	// through a verb (verbMayAsk) lets exactly that through.
-	paths := make([]string, 0, len(added))
-	for _, dir := range added {
-		if dir == "." {
-			dir = ""
-		}
-		paths = append(paths, dir)
+	fmt.Printf("%s merged into %s (%.8s) on the operator's Approve (%s): the mesh builds nothing from it yet, so %s "+
+		"are registered from the builder's done keys, asking no build\n", repository, m.Base, m.Commit, why,
+		strings.Join(added, ", "))
+	// Answered: it no longer waits, so the word's arrival again does nothing twice.
+	if err := inv.AnswerMerge(ctx, repository, m.Commit, inventory.WaitingRecord, false); err != nil {
+		return err
 	}
-	askBuilds(withFirstBuildWarrant(ctx, repository, paths, why), inv, m, buildSource{Repository: repository, Seat: gitSeat}, added)
-	// Answered: it no longer waits, so the word's arrival again asks nothing twice.
-	return inv.AnswerMerge(ctx, repository, m.Commit, inventory.WaitingRecord, false)
+	modules, err := newModulesOf(ctx, repository)
+	switch {
+	case err != nil:
+		// Said, not failed: the merge is answered, and the look at every module when a controller starts, or the next
+		// write of the builder or the indexer for one of them, registers them.
+		fmt.Printf("  the indexer's modules of %s cannot be read now (%v): they are registered when the builder's next "+
+			"write of one wakes the take-in\n", repository, err)
+	case len(modules) > 0:
+		inBackground(func() { takeNewModules(context.WithoutCancel(ctx), open, modules...) })
+	}
+	return nil
 }
 
 // resumeFirstBuilds runs firstBuilds for the first merges waiting for the word mesh-delivery just announced for a pull
@@ -102,7 +111,7 @@ func (f following) resumeFirstBuilds(ctx context.Context, d deliveryMerge) error
 	}
 	for _, w := range waiting {
 		k := announcedOf(w)
-		if !k.FirstBuild || !strings.EqualFold(k.Owner+"/"+k.Repo, d.Owner+"/"+d.Repo) || k.Number != d.Number ||
+		if !k.FirstBuild || len(k.Held) > 0 || !strings.EqualFold(k.Owner+"/"+k.Repo, d.Owner+"/"+d.Repo) || k.Number != d.Number ||
 			k.HeadSHA != d.HeadSHA {
 			continue
 		}
@@ -125,7 +134,7 @@ func (f following) resumeFirstBuilds(ctx context.Context, d deliveryMerge) error
 		case err != nil:
 			return notNow(err)
 		case len(added) > 0:
-			if err := askFirstBuilds(ctx, inv, k.SourceMoved, time.Now().UTC(), added, why); err != nil {
+			if err := askFirstBuilds(ctx, f.open, k.SourceMoved, time.Now().UTC(), added, why); err != nil {
 				return notNow(err)
 			}
 		}
@@ -172,6 +181,29 @@ func firstBuildsOf(ctx context.Context, inv catalogueReader, m link.SourceMoved,
 	return nil, "", err
 }
 
+// heldFirstBuild says a first build was refused because its manifest uses a word the running build-agent does not read,
+// and its merge is kept waiting for a build-agent that reads it (novox/hq ADR 0482 §5, issue 1173). Read from a merge kept
+// before R4e, never written since: nothing asks a first build (ADR 0501 §6), and a controller that starts answers such a
+// merge and registers its modules from their keys (answerHeldMerges).
+type heldFirstBuild struct {
+	Module string    `json:"module"`
+	Path   string    `json:"path"`
+	Word   string    `json:"word"`
+	At     time.Time `json:"at"`
+}
+
+// unknownWord is how the strict reading of a manifest says a word is not one it knows: encoding/json's own words, which
+// the build-agent's answer carries whole. The build's answer has no typed field for it (Failed is the builder's words).
+var unknownWord = regexp.MustCompile(`json: unknown field "([^"]+)"`)
+
+// refusedWord is the word a build's failure says the reader did not know; empty when it says none.
+func refusedWord(failed string) string {
+	if m := unknownWord.FindStringSubmatch(failed); m != nil {
+		return m[1]
+	}
+	return ""
+}
+
 // probeFirstBuildsID is the probe that reads the first merges waiting for mesh-delivery's word.
 const probeFirstBuildsID = "D18"
 
@@ -203,9 +235,10 @@ func firstBuildObservations(waiting []inventory.BatchedMerge, now time.Time) []c
 			Headline: fmt.Sprintf("The first build of %s is not asked: no Approve was announced", repository),
 			Explanation: fmt.Sprintf("The merge %.8s into %s adds modules the mesh builds nothing from yet. It registers them "+
 				"only when mesh-delivery announces that it merged the pull request on your Approve of that head, and no such "+
-				"announcement has come in %s. The merge is kept, and the builds are asked the moment the announcement is kept.",
+				"announcement has come in %s. The merge is kept, and the modules are registered from the builder's keys the moment "+
+				"the announcement is kept.",
 				k.Commit, repository, for_),
-			Resolved: "mesh-delivery announces the merge, or a hand `build` registers the modules",
+			Resolved: "mesh-delivery announces the merge, or the operator registers the modules at the controller's terminal",
 		})
 	}
 	return out
@@ -217,5 +250,28 @@ func probeFirstBuilds(ctx context.Context, d *doctor) ([]conditions.Observation,
 	if err != nil {
 		return nil, err
 	}
-	return firstBuildObservations(waiting, time.Now().UTC()), nil
+	now := time.Now().UTC()
+	return append(firstBuildObservations(waiting, now), newModuleObservations(now)...), nil
+}
+
+// answerHeldMerges answers every merge a controller of before held for a build-agent that reads its new modules'
+// manifests (issue 1173): nothing asks their first builds any more, and the look at every module when this controller
+// starts registers them from their keys (ADR 0501 §6, §7).
+func answerHeldMerges(ctx context.Context, inv *inventory.Inventory) {
+	waiting, err := inv.WaitingMerges(ctx)
+	if err != nil {
+		fmt.Printf("the merges held for a newer build-agent could not be read: %v\n", err)
+		return
+	}
+	for _, w := range waiting {
+		if k := announcedOf(w); len(k.Held) > 0 {
+			if err := inv.AnswerMerge(ctx, w.Repository, w.Commit, inventory.WaitingRecord, false); err != nil {
+				fmt.Printf("the merge %.8s of %s held for a newer build-agent could not be answered: %v\n", w.Commit,
+					w.Repository, err)
+				continue
+			}
+			fmt.Printf("the merge %.8s of %s was held for a newer build-agent; its modules are registered from the "+
+				"builder's keys instead\n", w.Commit, w.Repository)
+		}
+	}
 }

cmd/mesh-controller/first_builds_integration_test.go

@@ -5,71 +5,48 @@ package main
 import (
 	"context"
 	"encoding/json"
-	"slices"
-	"sync"
 	"testing"
 	"time"
 
 	"github.com/nats-io/nats.go/jetstream"
 
 	"git.novox.be/novox/mesh-sdk/go/catalogue"
+	sdkdelivery "git.novox.be/novox/mesh-sdk/go/delivery"
 	"github.com/novox/mesh-controller/internal/broker"
 	"github.com/novox/mesh-controller/internal/inventory"
 	"github.com/novox/mesh-controller/internal/link"
-	"github.com/novox/mesh-controller/internal/testbus"
 )
 
-// 1146/AC7, whole against a real bus and the store, in both orders of the two events (novox/hq ADR 0432, issue 1146):
-// mesh-delivery #7 merged on the operator's Approve into a repository the mesh builds nothing from. The forge's merge,
-// heard as the controller hears it (SourceMoved), and mesh-delivery's word, published on the subject the controller
-// consumes with the router's record of the ask in its bucket, come in either order; each way the first build of the
-// module the merge commit holds is asked exactly once, its outcome registers the module, and it is in the catalogue.
-// Without the Approve in the record nothing is asked. Store-backed: skips without one.
-func TestAMergeOnTheApproveIntoANewRepositoryAsksTheFirstBuildAndItsOutcomeRegistersTheModule(t *testing.T) {
+// 1146/AC7 on keys (ADR 0501 §3, §6; issue 1851, A5), whole against a real bus and the store, in both orders of the two
+// events: mesh-delivery #7 merged on the operator's Approve into a repository the mesh builds nothing from. The forge's
+// merge, heard as the controller hears it (SourceMoved), and mesh-delivery's word, published on the subject the
+// controller consumes with the router's record of the ask in its bucket, come in either order; each way the module the
+// merge commit holds is registered from the builder's done key of it, and nothing asks a build. Without the Approve in
+// the record it is not registered. Store-backed: skips without one.
+func TestAMergeOnTheApproveIntoANewRepositoryRegistersItsModuleFromItsKey(t *testing.T) {
 	const head, commit = "a1a1a1a1a1a1a1a1a1a1a1a1a1a1a1a1a1a1a1a1", "0177ea7a00000000"
 	for _, c := range []struct {
-		what        string
-		wordFirst   bool
-		approved    bool // the router's record holds the operator's Approve of the merged head
-		wantRegiter bool
+		what         string
+		wordFirst    bool
+		approved     bool // the router's record holds the operator's Approve of the merged head
+		wantRegister bool
 	}{
-		{what: "the forge's merge before mesh-delivery's word", approved: true, wantRegiter: true},
-		{what: "mesh-delivery's word before the forge's merge", wordFirst: true, approved: true, wantRegiter: true},
+		{what: "the forge's merge before mesh-delivery's word", approved: true, wantRegister: true},
+		{what: "mesh-delivery's word before the forge's merge", wordFirst: true, approved: true, wantRegister: true},
 		{what: "a word whose record holds no Approve", wordFirst: true},
 	} {
 		t.Run(c.what, func(t *testing.T) {
 			open := aMesh(t)
 			ctx := t.Context()
 			inv := open.inventory
-			// The real ask, guard and queue included: only its answers are kept, so the build's outcome can be matched.
-			aForgeAndABuildSeat(t, open)
-			// Written by the controller's merge path on its own goroutine, read by the test: under one lock.
-			var mu sync.Mutex
-			var asks [][3]string
-			var ids []string
-			asked := func() [][3]string { mu.Lock(); defer mu.Unlock(); return slices.Clone(asks) }
-			realAsk := askABuild
-			askABuild = func(c context.Context, source buildSource, path, ref string) (string, error) {
-				id, err := realAsk(c, source, path, ref)
-				if err == nil {
-					mu.Lock()
-					asks = append(asks, [3]string{source.Repository, path, ref})
-					ids = append(ids, id)
-					mu.Unlock()
-				}
-				return id, err
-			}
-			t.Cleanup(func() { askABuild = realAsk })
+			noBuildAsked(t)
+			b := aBuilderOnTheBus(t)
+			js := b.js
 			if err := inv.RegisterModule(ctx, catalogue.Manifest{Module: "operator-channel", Version: "1",
 				DefinesSeats: []catalogue.SeatDeclaration{{Name: broker.AsksSeat, Records: []string{"asks"}}}},
 				inventory.Source{Repository: "novox/mesh-catalog", Seat: "git", Path: "modules/operator-channel", BuiltFrom: "c0ffee"}); err != nil {
 				t.Fatal(err)
 			}
-			js, err := broker.Dial(testbus.URL(t))
-			if err != nil {
-				t.Fatal(err)
-			}
-			t.Cleanup(js.Close)
 			if err := broker.AssertMeshStreams(js); err != nil {
 				t.Fatal(err)
 			}
@@ -87,10 +64,14 @@ func TestAMergeOnTheApproveIntoANewRepositoryAsksTheFirstBuildAndItsOutcomeRegis
 			a := aDeliveryMergeOf(t, head, map[string]string{"novox/mesh-delivery@a1a1a1a1a1a1": head})
 			if c.approved {
 				record, _ := json.Marshal(map[string]any{"state": "closed", "ask": a.ask, "warrant": a.warrant})
-				if _, err := records.Put(ctx, theDelivery+"."+a.merge.AskID, record); err != nil {
+				if _, err := records.Put(ctx, sdkdelivery.TellerModule+"."+a.merge.AskID, record); err != nil {
 					t.Fatal(err)
 				}
 			}
+			// The indexer's value and the builder's done key of the module the merge commit holds.
+			fp := fpOf('9')
+			manifest := b.indexed(t, "mesh-delivery-view", "1", "novox/mesh-delivery", ".", commit, fp)
+			b.built(t, "mesh-delivery-view", "1", fp, manifest, sdkdelivery.BuildDone)
 
 			following := following{open: open}
 			server := link.ConnectNats(js, nil, noListener{})
@@ -104,8 +85,6 @@ func TestAMergeOnTheApproveIntoANewRepositoryAsksTheFirstBuildAndItsOutcomeRegis
 			done := make(chan struct{})
 			go func() { defer close(done); _ = server.Serve(serving) }()
 			t.Cleanup(func() { stop(); <-done })
-			servingBus.Store(js)
-			t.Cleanup(func() { servingBus.Store(nil) })
 
 			word := func() {
 				t.Helper()
@@ -133,37 +112,27 @@ func TestAMergeOnTheApproveIntoANewRepositoryAsksTheFirstBuildAndItsOutcomeRegis
 				forge()
 			} else {
 				forge()
-				if len(asked()) != 0 {
-					t.Fatalf("1146/AC7: the merge asked %v before mesh-delivery's word was kept", asked())
+				time.Sleep(300 * time.Millisecond)
+				if _, known := inventoryHolds(t, inv, "mesh-delivery-view"); known {
+					t.Fatal("1146/AC7: registered before mesh-delivery's word was kept")
 				}
 				word()
 			}
-			if !c.wantRegiter {
-				if len(asked()) != 0 {
-					t.Fatalf("1146/AC7: a merge whose record holds no Approve asked %v", asked())
+			if !c.wantRegister {
+				time.Sleep(time.Second)
+				if _, known := inventoryHolds(t, inv, "mesh-delivery-view"); known {
+					t.Fatal("1146/AC7: a merge whose record holds no Approve registered its module")
 				}
 				return
 			}
-			want := [3]string{"novox/mesh-delivery", "", "main"}
-			becomes(t, 10*time.Second, "the first build asked", func() bool { return len(asked()) >= 1 })
-			if got := asked(); len(got) != 1 || got[0] != want {
-				t.Fatalf("1146/AC7: the merge asked %v, want %v once", got, want)
-			}
-			mu.Lock()
-			first := ids[0]
-			mu.Unlock()
-			build := onTrunk(first, "novox/mesh-delivery", "git", "", map[string]any{"module": "mesh-delivery-view", "version": "1"})
-			build.Commit = commit
-			if _, _, err := takeIn(ctx, inv, build); err != nil {
-				t.Fatalf("1146/AC7: the outcome of the first build was refused: %v", err)
-			}
+			becomes(t, 10*time.Second, "the module registered", func() bool {
+				_, known := inventoryHolds(t, inv, "mesh-delivery-view")
+				return known
+			})
 			src, err := inv.SourceOf(ctx, "mesh-delivery-view")
 			if err != nil || src.Repository != "novox/mesh-delivery" {
 				t.Fatalf("1146/AC7: the module is built from %q (%v)", src.Repository, err)
 			}
-			if _, known := inventoryHolds(t, inv, "mesh-delivery-view"); !known {
-				t.Fatal("1146/AC7: the module is not in the catalogue")
-			}
 		})
 	}
 }

cmd/mesh-controller/forge_address_test.go

@@ -64,7 +64,7 @@ func registerFrom(t *testing.T, forms *sourceForms) (int64, error) {
 	mesh := &aMeshRegisteredFromTheURL{anEmptyMesh{asked: true,
 		request: inventory.BuildRequest{ID: "build-1", Repository: aRepoOnTheForge, For: "build"}}, aRepoOnTheForge}
 	return mayRegisterIn(t.Context(), mesh, forms, "mesh-delivery-view", inventory.Source{Repository: aRepoOnTheForge},
-		"build-1", "", "main")
+		registrationAsk{Build: "build-1"}, "", "main")
 }
 
 // 1277/AC2: an address unread twice, then read, is waited out and the forge is asked.
@@ -112,7 +112,7 @@ func TestAKnownAddressAndAnotherHostIsStillNotOnTheForge(t *testing.T) {
 	const elsewhere = "http://elsewhere.example/x/y.git"
 	mesh := &aMeshRegisteredFromTheURL{anEmptyMesh{asked: true, request: inventory.BuildRequest{ID: "build-1", For: "build"}}, elsewhere}
 	_, err := mayRegisterIn(t.Context(), mesh, sourceFormsRead(context.Background(), time.Now, read), "mesh-delivery-view",
-		inventory.Source{Repository: elsewhere}, "build-1", "", "main")
+		inventory.Source{Repository: elsewhere}, registrationAsk{Build: "build-1"}, "", "main")
 	if !errors.Is(err, errNotItsSource) || !strings.Contains(err.Error(), "is not on the mesh's forge") {
 		t.Fatalf("1277/AC4: the refusal changed: %v", err)
 	}

cmd/mesh-controller/forge_wait_test.go

@@ -68,7 +68,7 @@ func TestTheForgeNotAnsweringInTimeIsNotAskedAgain(t *testing.T) {
 // An ask that hangs past the bound is cut off at the bound, not at its own wait, and the failure still says it
 // waited: the receive loop is held no longer than the bound (novox/hq issue 486).
 func TestAnAskHangingPastTheBoundIsCutOffAtIt(t *testing.T) {
-	w := waitOut{bound: 200 * time.Millisecond, first: 10 * time.Millisecond, most: 50 * time.Millisecond,
+	w := waitOut{bound: 100 * time.Millisecond, first: 10 * time.Millisecond, most: 50 * time.Millisecond,
 		now: time.Now, sleep: sleepOrDone}
 	asked := 0
 	began := time.Now()

cmd/mesh-controller/gate_integration_test.go

@@ -444,8 +444,12 @@ func TestAMergeThatDeletesAModulePlansNothingToBuildForIt(t *testing.T) {
 	if err := inv.SavePlan(ctx, &plan); err != nil {
 		t.Fatal(err)
 	}
-	planBuilt(ctx, open, "kept", "", "http://forge/novox/mesh-catalog.git has no module.json at modules/kept, so "+
-		"there is nothing saying what it is: open …/module.json: no such file or directory", asked0, "build-k")
+	if err := inv.RecordBuild(ctx, inventory.Build{ID: "build-k", Module: "kept", Repository: "novox/mesh-catalog",
+		At: time.Now().UTC(), Asked: asked0, Failed: "http://forge/novox/mesh-catalog.git has no module.json at modules/kept, so " +
+			"there is nothing saying what it is: open …/module.json: no such file or directory"}); err != nil {
+		t.Fatal(err)
+	}
+	advancePlans(ctx, open)
 	p, _ := inv.PlanByID(ctx, "plan-deleted")
 	if p.State == inventory.PlanFailed || p.Modules["kept"].State != planDeleted {
 		t.Fatalf("a module deleted at its source failed the plan: %s %+v", p.State, p.Modules["kept"])

cmd/mesh-controller/grants.go

@@ -0,0 +1,168 @@
+package main
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"sort"
+	"strings"
+
+	sdkdelivery "git.novox.be/novox/mesh-sdk/go/delivery"
+	"github.com/nats-io/nats.go/jetstream"
+
+	"github.com/novox/mesh-controller/internal/broker"
+	"github.com/novox/mesh-controller/internal/inventory"
+)
+
+// The grants issued (novox/hq ADR 0528 clause 2, ADR 0429 §6 rule 6, issue 1394): what the assigner's sixth rule reads,
+// that a module's bus credential for a fingerprint exists. A module's permissions on the bus are what the bus's user list
+// composes from its registered manifest (inv.BusRecords), and a module's manifest is registered at a fingerprint when the
+// controller takes it in from the builder's key; so once the list is sent to the machine that runs the bus, the
+// credential of every module it carried is issued at the fingerprint of the build it is registered at. The controller
+// writes `<module>.<fingerprint hex>` then, naming the accounts it composed for the module, never removed. A module one
+// of whose accounts has no password yet (the list leaves it out) has no grant until a later send carries it.
+
+// grantsFrom is the grant of every module whose accounts all have a password in hashes, at the fingerprint current names
+// for it; a module whose current build names no fingerprint of the new form has none. principals are the bus's users
+// as broker.Users composes them.
+func grantsFrom(principals []broker.Principal, hashes map[string]string, current map[string]string) map[string]sdkdelivery.ControllerGrant {
+	accounts, missing := map[string][]string{}, map[string]bool{}
+	for _, p := range principals {
+		if p.Module == "" || (p.Kind != broker.KindModule && p.Kind != broker.KindProcess) {
+			continue
+		}
+		if hashes[p.Username()] == "" {
+			missing[p.Module] = true
+			continue
+		}
+		accounts[p.Module] = append(accounts[p.Module], p.Username())
+	}
+	out := map[string]sdkdelivery.ControllerGrant{}
+	for module, fp := range current {
+		if missing[module] || !strings.HasPrefix(fp, sdkdelivery.SourcePrefix2) {
+			continue
+		}
+		key, err := sdkdelivery.ControllerGrantKey(module, fp)
+		if err != nil {
+			continue
+		}
+		names := accounts[module]
+		sort.Strings(names)
+		out[key] = sdkdelivery.ControllerGrant{Accounts: names}
+	}
+	return out
+}
+
+// currentFingerprints is, by module, the fingerprint of the build each registered module is registered at: its
+// manifest's commit (built_from), that commit's newest successful build, and the fingerprint that build names.
+func currentFingerprints(ctx context.Context, inv *inventory.Inventory) (map[string]string, error) {
+	builds, err := inv.CurrentBuilds(ctx)
+	if err != nil {
+		return nil, err
+	}
+	out := map[string]string{}
+	for module, b := range builds {
+		if b.Commit == "" {
+			continue
+		}
+		id, err := inv.BuildOf(ctx, module, b.Commit)
+		if err != nil || id == "" {
+			continue
+		}
+		build, found, err := inv.BuildByID(ctx, id)
+		if err != nil || !found {
+			continue
+		}
+		out[module] = build.SourceFingerprint
+	}
+	return out, nil
+}
+
+// grantsKV is what writing the grants needs of their bucket.
+type grantsKV interface {
+	Get(ctx context.Context, key string) (jetstream.KeyValueEntry, error)
+	Create(ctx context.Context, key string, value []byte, opts ...jetstream.KVCreateOpt) (uint64, error)
+	Update(ctx context.Context, key string, value []byte, revision uint64) (uint64, error)
+}
+
+// keepGrants writes every grant the list just sent issued that the bucket does not hold as it is: a create for a new one,
+// a compare-and-set for one whose accounts changed. It answers how many it wrote.
+func keepGrants(ctx context.Context, kv grantsKV, grants map[string]sdkdelivery.ControllerGrant) (int, error) {
+	keys := make([]string, 0, len(grants))
+	for k := range grants {
+		keys = append(keys, k)
+	}
+	sort.Strings(keys)
+	wrote := 0
+	var errs []error
+	for _, key := range keys {
+		value, err := sdkdelivery.EncodeControllerGrant(grants[key])
+		if err != nil {
+			errs = append(errs, fmt.Errorf("%s: %w", key, err))
+			continue
+		}
+		e, err := kv.Get(ctx, key)
+		switch {
+		case errors.Is(err, jetstream.ErrKeyNotFound):
+			_, err = kv.Create(ctx, key, value)
+		case err != nil:
+		default:
+			if before, derr := sdkdelivery.DecodeControllerGrant(e.Value()); derr == nil && sdkdelivery.SameControllerGrant(before, withVersion(grants[key])) {
+				continue
+			}
+			_, err = kv.Update(ctx, key, value, e.Revision())
+		}
+		if err != nil {
+			errs = append(errs, fmt.Errorf("%s: %w", key, err))
+			continue
+		}
+		wrote++
+	}
+	return wrote, errors.Join(errs...)
+}
+
+func withVersion(g sdkdelivery.ControllerGrant) sdkdelivery.ControllerGrant {
+	g.V = sdkdelivery.Version
+	return g
+}
+
+// grantsIssued writes the grants the bus's user list just sent to its machine issued (ADR 0528 clause 2). Said, never
+// fatal: a grant not written now is written at the next send of the list, and the assigner's wants wait for it.
+func grantsIssued(ctx context.Context, inv *inventory.Inventory, js jetstream.JetStream, indent string) {
+	kv, err := js.KeyValue(ctx, broker.GrantsBucket)
+	if err != nil {
+		fmt.Printf("%sthe grants issued are not written: the bucket %s: %v\n", indent, broker.GrantsBucket, err)
+		return
+	}
+	records, err := inv.BusRecords(ctx)
+	if err != nil {
+		fmt.Printf("%sthe grants issued are not written: %v\n", indent, err)
+		return
+	}
+	principals, err := broker.Users(records)
+	if err != nil {
+		fmt.Printf("%sthe grants issued are not written: %v\n", indent, err)
+		return
+	}
+	kept, err := inv.BusUsers(ctx)
+	if err != nil {
+		fmt.Printf("%sthe grants issued are not written: %v\n", indent, err)
+		return
+	}
+	hashes := make(map[string]string, len(kept))
+	for name, u := range kept {
+		hashes[name] = u.PasswordHash
+	}
+	current, err := currentFingerprints(ctx, inv)
+	if err != nil {
+		fmt.Printf("%sthe grants issued are not written: %v\n", indent, err)
+		return
+	}
+	wrote, err := keepGrants(ctx, kv, grantsFrom(principals, hashes, current))
+	if wrote > 0 {
+		fmt.Printf("%s%d grant(s) issued written for the assigner\n", indent, wrote)
+	}
+	if err != nil {
+		fmt.Printf("%ssome grants issued are not written: %v\n", indent, err)
+	}
+}

cmd/mesh-controller/grants_integration_test.go

@@ -0,0 +1,91 @@
+//go:build integration
+
+package main
+
+import (
+	"context"
+	"testing"
+
+	"git.novox.be/novox/mesh-sdk/go/catalogue"
+	sdkdelivery "git.novox.be/novox/mesh-sdk/go/delivery"
+	"github.com/nats-io/nats.go"
+	"github.com/nats-io/nats.go/jetstream"
+
+	"github.com/novox/mesh-controller/internal/broker"
+	"github.com/novox/mesh-controller/internal/inventory"
+	"github.com/novox/mesh-controller/internal/link"
+	"github.com/novox/mesh-controller/internal/testbus"
+)
+
+// 1394/AC1 of C9 (ADR 0528 clause 2): when the controller has issued mesh-x's credential for fingerprint F (mesh-x
+// registered at a build of F, its account minted, the bus's machine sent its declaration with the user list, through
+// overTheBus.declare as a push sends it), then grants.mesh-x.F exists on the bus,
+// and a second pass writes it again as nothing new.
+func TestTheGrantOfAnIssuedCredentialIsOnTheBus(t *testing.T) {
+	open := aMesh(t)
+	ctx := t.Context()
+	inv := open.inventory
+	fp := grantFP('d')
+	m := catalogue.Manifest{Module: "mesh-x", Version: "1", OwnSecrets: catalogue.OwnSecrets{"broker": {Path: "/var/lib/mesh-x/broker"}}}
+	if err := inv.RecordBuild(ctx, inventory.Build{ID: "build-x1", Repository: "novox/mesh-x", Module: "mesh-x", Commit: "c0ffee1",
+		SourceFingerprint: fp}); err != nil {
+		t.Fatal(err)
+	}
+	if err := inv.RegisterModule(ctx, m, inventory.Source{Repository: "novox/mesh-x", BuiltFrom: "c0ffee1", Head: "c0ffee1"}); err != nil {
+		t.Fatal(err)
+	}
+	if _, err := assign(ctx, open, "anchor", "mesh-x"); err != nil {
+		t.Fatal(err)
+	}
+	user := broker.Principal{Kind: broker.KindModule, Node: "anchor", Module: "mesh-x"}.Username()
+	if _, err := inv.MintBusPassword(ctx, inventory.BusUser{Username: user, Kind: inventory.BusModule, Node: "anchor", Module: "mesh-x"}); err != nil {
+		t.Fatal(err)
+	}
+	conn, err := nats.Connect(testbus.URL(t))
+	if err != nil {
+		t.Fatal(err)
+	}
+	t.Cleanup(conn.Close)
+	js, err := jetstream.New(conn)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if err := broker.OnConn(conn).EnsureControllerBuckets(); err != nil {
+		t.Fatal(err)
+	}
+	// The live path: a send of the bus's machine's declaration carrying the user list (overTheBus.declare), which records
+	// the list sent and then writes the grants it issued.
+	legacy, err := conn.JetStream()
+	if err != nil {
+		t.Fatal(err)
+	}
+	_ = js.DeleteStream(ctx, "GRANTS_DECLARED")
+	if _, err := js.CreateStream(ctx, jetstream.StreamConfig{Name: "GRANTS_DECLARED", Subjects: []string{link.DeclareSubject("anchor")}}); err != nil {
+		t.Fatal(err)
+	}
+	t.Cleanup(func() { _ = js.DeleteStream(context.Background(), "GRANTS_DECLARED") })
+	send := overTheBus{open: open, server: link.SendingOn(link.OverNATS{Conn: conn, JS: legacy}), signer: aSignerOfZeros{}}
+	ready := readyNode{node: "anchor", declared: sendable{BusUsers: "the user list the bus's machine is sent"}}
+	if _, err := send.declare(ctx, ready, []byte(`{}`)); err != nil {
+		t.Fatalf("the send of the bus's machine: %v", err)
+	}
+	kv, err := js.KeyValue(ctx, broker.GrantsBucket)
+	if err != nil {
+		t.Fatal(err)
+	}
+	key, _ := sdkdelivery.ControllerGrantKey("mesh-x", fp)
+	e, err := kv.Get(ctx, key)
+	if err != nil {
+		t.Fatalf("no grant %s after the list was issued: %v", key, err)
+	}
+	g, err := sdkdelivery.DecodeControllerGrant(e.Value())
+	if err != nil || len(g.Accounts) != 1 || g.Accounts[0] != user {
+		t.Fatalf("the grant reads %+v, %v; want the account %s", g, err, user)
+	}
+	if _, err := send.declare(ctx, ready, []byte(`{}`)); err != nil {
+		t.Fatalf("the second send: %v", err)
+	}
+	if again, _ := kv.Get(ctx, key); again.Revision() != e.Revision() {
+		t.Errorf("a second pass wrote the grant again (revision %d, was %d)", again.Revision(), e.Revision())
+	}
+}

cmd/mesh-controller/grants_step_test.go

@@ -9,9 +9,7 @@ import (
 	"strings"
 	"testing"
 
-	"git.novox.be/novox/mesh-sdk/go/catalogue"
 	"github.com/novox/mesh-controller/internal/inventory"
-	"github.com/novox/mesh-controller/internal/link"
 )
 
 // The grants reach the bus before the gate (novox/hq issue 490).
@@ -176,35 +174,3 @@ func TestTheGrantsStepKeepsOneMachinesBuilds(t *testing.T) {
 		t.Error("the grants step keeps the builds of a machine it does not send")
 	}
 }
-
-// The delivery plan says the step before the merge.
-func TestAChangePlanSaysTheGrantsStep(t *testing.T) {
-	const catalogue_ = "http://forge.internal:20000/novox/mesh-catalog.git"
-	entry := func(name string, on ...string) inventory.Entry {
-		e := fromRepo(name, catalogue_, "modules/"+name)
-		e.Source.BuiltFrom = "old"
-		e.On = on
-		return e
-	}
-	nats := entry("nats", "novox")
-	nats.Manifest.BusUsers = "/etc/nats/users.conf"
-	nats.Manifest.Claims = []catalogue.Claim{{Name: catalogue.BrokerSeat, Scope: catalogue.ScopeMesh}}
-	restic := entry("restic", "ace", "novox", "shanks")
-	only := entry("bus-tools", "novox")
-	entries := []inventory.Entry{nats, restic, only}
-	rollsOut := func(string) (inventory.Upgrade, bool) { return inventory.Upgrade{RollOut: true}, true }
-	plan := func(paths ...string) link.ChangePlan {
-		m := link.SourceMoved{Owner: "novox", Repo: "mesh-catalog", Base: "main", Commit: "head", Paths: paths}
-		return changePlanOf("novox/mesh-catalog", "main", "head", reachOfMerge(m, entries, nil, nil), entries, rollsOut)
-	}
-
-	text := planText(plan("modules/restic/module.json"))
-	if !strings.Contains(text, "grants step: if this changes what the bus's user list says (a new tool, subject or "+
-		"user), novox is sent that list alone, every build there kept, before restic is judged on its first machine") {
-		t.Errorf("the change plan does not say the grants step:\n%s", text)
-	}
-	// A module only on the bus's machine goes there with the list in its own send: no step of its own.
-	if text := planText(plan("modules/bus-tools/module.json")); strings.Contains(text, "grants step") {
-		t.Errorf("a module on the bus's machine alone reads:\n%s", text)
-	}
-}

cmd/mesh-controller/grants_test.go

@@ -0,0 +1,106 @@
+package main
+
+import (
+	"context"
+	"strings"
+	"testing"
+	"time"
+
+	sdkdelivery "git.novox.be/novox/mesh-sdk/go/delivery"
+	"github.com/nats-io/nats.go/jetstream"
+
+	"github.com/novox/mesh-controller/internal/broker"
+)
+
+func grantFP(c byte) string { return sdkdelivery.SourcePrefix2 + strings.Repeat(string(c), 64) }
+
+// 1394/AC (unit half): the list sent issues the credential of every module whose accounts all have a password, at the
+// fingerprint its build names; a module with an account the list leaves out, and one registered at a fingerprint not of
+// the new form, get no grant; a module with no account of its own is granted with none.
+func TestTheGrantsAListIssues(t *testing.T) {
+	x := broker.Principal{Kind: broker.KindModule, Node: "novox", Module: "mesh-x"}
+	xp := broker.Principal{Kind: broker.KindProcess, Node: "novox", Module: "mesh-x", Process: "run"}
+	y := broker.Principal{Kind: broker.KindModule, Node: "ace", Module: "mesh-y"}
+	node := broker.Principal{Kind: broker.KindNode, Node: "novox"}
+	hashes := map[string]string{x.Username(): "h1", xp.Username(): "h2", node.Username(): "h3"}
+	got := grantsFrom([]broker.Principal{x, xp, y, node}, hashes,
+		map[string]string{"mesh-x": grantFP('a'), "mesh-y": grantFP('b'), "web": grantFP('c'), "old": "src1:abc"})
+	xKey, _ := sdkdelivery.ControllerGrantKey("mesh-x", grantFP('a'))
+	webKey, _ := sdkdelivery.ControllerGrantKey("web", grantFP('c'))
+	if len(got) != 2 {
+		t.Fatalf("grants = %v, want mesh-x's and web's", got)
+	}
+	if g := got[xKey]; len(g.Accounts) != 2 || g.Accounts[0] != x.Username() && g.Accounts[1] != x.Username() {
+		t.Errorf("mesh-x's grant = %+v, want both its accounts", g)
+	}
+	if g, ok := got[webKey]; !ok || len(g.Accounts) != 0 {
+		t.Errorf("web, with no account of its own, is granted %+v, %v", g, ok)
+	}
+}
+
+// fakeGrants is the grants bucket in memory.
+type fakeGrants struct {
+	values  map[string][]byte
+	creates int
+	updates int
+}
+
+type fakeEntry struct {
+	key   string
+	value []byte
+	rev   uint64
+}
+
+func (e fakeEntry) Bucket() string                  { return broker.GrantsBucket }
+func (e fakeEntry) Key() string                     { return e.key }
+func (e fakeEntry) Value() []byte                   { return e.value }
+func (e fakeEntry) Revision() uint64                { return e.rev }
+func (e fakeEntry) Created() time.Time              { return time.Time{} }
+func (e fakeEntry) Delta() uint64                   { return 0 }
+func (e fakeEntry) Operation() jetstream.KeyValueOp { return jetstream.KeyValuePut }
+
+func (f *fakeGrants) Get(_ context.Context, key string) (jetstream.KeyValueEntry, error) {
+	v, ok := f.values[key]
+	if !ok {
+		return nil, jetstream.ErrKeyNotFound
+	}
+	return fakeEntry{key: key, value: v, rev: 1}, nil
+}
+
+func (f *fakeGrants) Create(_ context.Context, key string, value []byte, _ ...jetstream.KVCreateOpt) (uint64, error) {
+	if _, ok := f.values[key]; ok {
+		return 0, jetstream.ErrKeyExists
+	}
+	f.values[key] = value
+	f.creates++
+	return 1, nil
+}
+
+func (f *fakeGrants) Update(_ context.Context, key string, value []byte, _ uint64) (uint64, error) {
+	f.values[key] = value
+	f.updates++
+	return 2, nil
+}
+
+// 1394/AC (unit half): a grant is created once; a second send of the same list writes nothing; a reissue for other
+// accounts is a new revision of the same key.
+func TestAGrantIsWrittenOnceAndMovedOnAReissue(t *testing.T) {
+	kv := &fakeGrants{values: map[string][]byte{}}
+	key, _ := sdkdelivery.ControllerGrantKey("mesh-x", grantFP('a'))
+	grants := map[string]sdkdelivery.ControllerGrant{key: {Accounts: []string{"novox.mesh-x"}}}
+	for range 2 {
+		if _, err := keepGrants(t.Context(), kv, grants); err != nil {
+			t.Fatal(err)
+		}
+	}
+	if kv.creates != 1 || kv.updates != 0 {
+		t.Errorf("creates %d, updates %d, want one create", kv.creates, kv.updates)
+	}
+	grants[key] = sdkdelivery.ControllerGrant{Accounts: []string{"ace.mesh-x"}}
+	if wrote, err := keepGrants(t.Context(), kv, grants); err != nil || wrote != 1 || kv.updates != 1 {
+		t.Errorf("a reissue wrote %d (%v), updates %d", wrote, err, kv.updates)
+	}
+	if g, err := sdkdelivery.DecodeControllerGrant(kv.values[key]); err != nil || g.Accounts[0] != "ace.mesh-x" {
+		t.Errorf("the grant reads %+v, %v", g, err)
+	}
+}

cmd/mesh-controller/handacts.go

@@ -64,6 +64,9 @@ var handActVerbs = []handActVerb{
 	{Verb: "plans stop", Decision: "the operator's answer to an ask is their decision, not a repair (ADR 0259)",
 		DecidedFor: []string{conditions.CauseOperatorAnswer}},
 	{Verb: "plans close"},
+	// A module registered at references by hand, because the builder had no key for it (ADR 0526 clause 3): a repair
+	// the builder should have made, so it counts.
+	{Verb: "register"},
 	// A walk started by a person instead of its delivery's owner (novox/hq ADR 0239): the owner down, or
 	// not trusted with it — either is a repair the owner should have made. Unless the operator chose it on
 	// a warrant (ADR 0259).

cmd/mesh-controller/held_moves.go

@@ -0,0 +1,198 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"sort"
+	"strings"
+
+	"github.com/novox/mesh-controller/internal/conditions"
+	"github.com/novox/mesh-controller/internal/inventory"
+)
+
+// A move held for a person is asked of the person (novox/hq issue 1732, issue 1320; ADR 0377, ADR 0259).
+//
+// **A wait only a person can end is said to that person at once.** ADR 0377 holds a recorded module's move that
+// recreates a container or touches its data until a person pushes the machine. The walk said so in its note and
+// ended "done", `status` named the machine behind, and nobody was asked: on 2026-10-21 mailu's new build waited on
+// novox for 40 minutes behind a plan that read "done, 3 tier(s)", and on 2026-10-19 mssql waited on ace the same way.
+// Row S24 raises one condition per machine that has such a move, for the operator, with the answer **Release**: the
+// push of that machine, which the controller's own `push` verb performs on the operator's warrant (ADR 0259). It ends
+// when the machine no longer waits, whoever pushed it.
+//
+// A hold a person chose is not asked again — a module they set to `record` with a why, and the bus, whose step has
+// its own row (S17).
+
+// kindMovesHeld is S24's kind: machine.<node>.moves-held.
+const kindMovesHeld = "moves-held"
+
+// heldFacts is one machine and the moves of recorded modules that wait there for a person.
+type heldFacts struct {
+	node  string
+	moves []heldMove
+}
+
+// gatherHeldMoves is, per machine that holds at least one move no person chose to hold, all its held moves, by machine.
+func gatherHeldMoves(ctx context.Context, inv *inventory.Inventory) ([]heldFacts, error) {
+	nodes, err := inv.Nodes(ctx)
+	if err != nil {
+		return nil, fmt.Errorf("the machines cannot be read: %w", err)
+	}
+	f, err := readMoveFacts(ctx, inv)
+	if err != nil {
+		return nil, err
+	}
+	var out []heldFacts
+	for _, n := range nodes {
+		moves, err := heldMovesOn(ctx, inv, f, n.Name)
+		if err != nil {
+			return nil, err
+		}
+		h := heldFacts{node: n.Name, moves: moves}
+		if len(h.asked()) > 0 {
+			out = append(out, h)
+		}
+	}
+	return out, nil
+}
+
+// asked are the moves no person chose to hold, and chosen the ones a person did (a module set to record with a why, the bus).
+func (h heldFacts) asked() []heldMove  { return h.byChoice(false) }
+func (h heldFacts) chosen() []heldMove { return h.byChoice(true) }
+
+func (h heldFacts) byChoice(chosen bool) []heldMove {
+	var out []heldMove
+	for _, m := range h.moves {
+		if m.Chosen == chosen {
+			out = append(out, m)
+		}
+	}
+	return out
+}
+
+// modules are the held moves' modules, in order, of all of them.
+func (h heldFacts) modules() []string { return moduleNames(h.moves) }
+
+func moduleNames(moves []heldMove) []string {
+	out := make([]string, 0, len(moves))
+	for _, m := range moves {
+		out = append(out, m.Module)
+	}
+	return out
+}
+
+// releaseAction is the one answer a held move offers: the push of the machine, approved by the operator. The push
+// names every module whose move waits there as one that may move its data: the operator's Approve is the word
+// ADR 0217 asks for, and the ask says so. Offered only where no person's own hold is on the machine too: a push
+// composes every recorded module at its current build, so it would send that move as well, which the ask never named
+// (ADR 0259 §6), and hold the whole machine if that module's data would move.
+func (h heldFacts) releaseAction() conditions.Action {
+	return conditions.Action{Label: "Release", Verb: "mesh-controller.push", Level: conditions.LevelApprove,
+		Arguments: map[string]string{"node": h.node, "move": strings.Join(moduleNames(h.asked()), ","), "why": "",
+			"cause": conditions.CauseOperatorAnswer}}
+}
+
+// heldWords are the plain words of a machine's held moves: which modules wait, why in general, and what an Approve does.
+func heldWords(h heldFacts) (headline, explanation, needs string, resolved string) {
+	names := namesWords(moduleNames(h.asked()), 3)
+	headline = clipWords(conditions.Capital(names)+" waits for you on "+h.node, conditions.HeadlineMax)
+	recreates, data := false, false
+	for _, m := range h.asked() {
+		switch {
+		case strings.Contains(m.Why, "recreates"):
+			recreates = true
+		default:
+			data = true
+		}
+	}
+	why := "would change what it runs"
+	switch {
+	case recreates && data:
+		why = "would restart a container or touch its data"
+	case recreates:
+		why = "would restart one of its containers"
+	case data:
+		why = "would touch its files or data"
+	}
+	explanation = clipWords(fmt.Sprintf("The new version of %s %s on %s, so it does not go out with its delivery; "+
+		"it waits for you. Release sends %s everything it is owed, these among it, and lets their data move where it "+
+		"has to. Nothing is sent until you answer.", names, why, h.node, h.node), conditions.ExplanationMax)
+	needs = "release them " + FromMeshMCPServer
+	if chosen := h.chosen(); len(chosen) > 0 {
+		// A push of the machine would send the move a person chose to hold as well: no answer is offered here.
+		explanation = clipWords(fmt.Sprintf("The new version of %s %s on %s, so it does not go out with its delivery; "+
+			"it waits for you. %s is also held there by your own choice, and a push of %s would send that too, so "+
+			"nothing is offered here: the push is yours at the controller's terminal.",
+			names, why, h.node, conditions.Capital(namesWords(moduleNames(chosen), 3)), h.node), conditions.ExplanationMax)
+		needs = fmt.Sprintf("push %s at the controller's terminal, once you have decided about %s.", h.node,
+			namesWords(moduleNames(chosen), 3))
+	}
+	resolved = "Resolved: " + names + " is no longer waiting on " + h.node
+	return
+}
+
+// watchMovesHeld is S24: a machine that has moves of recorded modules waiting for a person, said to the operator with the
+// answer that sends them. The condition ends when the machine no longer waits: it is no longer among the facts.
+func watchMovesHeld(f *signalFacts) []conditions.Observation {
+	var out []conditions.Observation
+	for _, h := range f.held {
+		var said []string
+		for _, m := range h.moves {
+			said = append(said, fmt.Sprintf("%s %s → %s %s", m.Module, short(m.From), short(m.To), m.Why))
+		}
+		headline, explanation, needs, resolved := heldWords(h)
+		if c := h.chosen(); len(c) > 0 {
+			said = append(said, "held by a person's own choice: "+strings.Join(moduleNames(c), ", "))
+		}
+		var actions []conditions.Action
+		if len(h.chosen()) == 0 {
+			actions = []conditions.Action{h.releaseAction()}
+		}
+		out = append(out, conditions.Observation{Scope: conditions.ScopeMachine, ID: h.node, Kind: kindMovesHeld,
+			Machine: h.node, Severity: conditions.Warning, Resolver: conditions.ResolverOperator,
+			Summary: fmt.Sprintf("%s has %d move(s) of recorded modules waiting for a person's push: %s — `push %s` sends them",
+				h.node, len(h.moves), strings.Join(h.modules(), ", "), h.node),
+			Said:     strings.Join(said, "; "),
+			Headline: headline, Explanation: explanation, Needs: needs, Resolved: resolved,
+			Actions: actions})
+	}
+	return out
+}
+
+// planHeld is, for a plan that ended or is running, the moves its modules carried that a machine still holds for a
+// person: "module on machine", sorted. The plan's own record says the move waited when it was judged
+// (PlanModule.Recorded); the machines say whether it still does, and for the build this plan carried, so a plan older
+// than the build now held is not named.
+func planHeld(p inventory.Plan, held []heldFacts) []string {
+	var out []string
+	for _, h := range held {
+		for _, m := range h.moves {
+			s := p.Modules[m.Module]
+			if s == nil || !strings.HasPrefix(s.Recorded[h.node], "waits:") || !sameCommit(s.Commit, m.To) {
+				continue
+			}
+			out = append(out, m.Module+" on "+h.node)
+		}
+	}
+	sort.Strings(out)
+	return out
+}
+
+// heldSaid is what a plan's line adds when it carries a move that a machine holds for a person (novox/hq issue 1732): a
+// plan whose module waits for a push is not plainly "done".
+func heldSaid(p inventory.Plan, held []heldFacts) string {
+	waiting := planHeld(p, held)
+	if len(waiting) == 0 {
+		return ""
+	}
+	return fmt.Sprintf(" — %d held for a person: %s (the operator is asked)", len(waiting), strings.Join(waiting, ", "))
+}
+
+// heldNow reads the machines' held moves for a plan's line, nil when they cannot be read: the line then reads as before.
+func heldNow(ctx context.Context, inv *inventory.Inventory) []heldFacts {
+	held, err := gatherHeldMoves(ctx, inv)
+	if err != nil {
+		return nil // empty-on-error: a plan's line then reads as it did before; the watchdog (S24) says it cannot read
+	}
+	return held
+}

cmd/mesh-controller/held_moves_integration_test.go

@@ -0,0 +1,92 @@
+//go:build integration
+
+package main
+
+import (
+	"context"
+	"strings"
+	"testing"
+	"time"
+
+	"github.com/novox/mesh-controller/internal/inventory"
+)
+
+func inventoryUpgrade(why string) inventory.Upgrade { return inventory.Upgrade{Why: why, By: "jochen"} }
+
+func mustMoveFacts(t *testing.T, rm *recordedMesh) moveFacts {
+	t.Helper()
+	f, err := readMoveFacts(t.Context(), rm.open.inventory)
+	if err != nil {
+		t.Fatal(err)
+	}
+	return f
+}
+
+// 1732/AC8 (integration): a mesh running mailu at c1 on two machines, whose registered c2 recreates a container, is read
+// as two machines each holding mailu's move for a person; a bundle-only c3 on top changes nothing of it; after a machine
+// is sent c2 (as a push records it) it is no longer among them, and plans that carried c2 say nothing more of it.
+func TestMachinesHoldingAMoveForAPersonAreReadFromTheRecords(t *testing.T) {
+	rm := aRecordedMesh(t, aMailu(true))
+	c2 := aMailu(true)
+	resourceOf(&c2, "imap")["image"] = "registry.invalid/imap@sha256:2"
+	rm.register(t, c2, "c2", time.Now().Add(-time.Minute))
+	ctx := t.Context()
+	held, err := gatherHeldMoves(ctx, rm.open.inventory)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if len(held) != 2 || held[0].node != "anchor" || held[1].node != "laptop" || len(held[0].moves) != 1 ||
+		held[0].moves[0].Module != "mailu" || held[0].moves[0].To != "c2" || !strings.Contains(held[0].moves[0].Why, "recreates") {
+		t.Fatalf("held %+v", held)
+	}
+	if err := rm.open.inventory.RecordSent(ctx, nodeID(t, rm.open, "anchor"), "d-anchor-c2", map[string]string{"mailu": "c2"}); err != nil {
+		t.Fatal(err)
+	}
+	held, err = gatherHeldMoves(ctx, rm.open.inventory)
+	if err != nil || len(held) != 1 || held[0].node != "laptop" {
+		t.Fatalf("after anchor was sent c2: %+v (%v)", held, err)
+	}
+}
+
+// 1732/AC9 (integration): a module a person set to record is no ask: they chose the hold.
+func TestAHoldAPersonChoseIsNotAsked(t *testing.T) {
+	rm := aRecordedMesh(t, aMailu(false))
+	c2 := aMailu(false)
+	c2.Bundles[0].Digest = "sha256:bbb"
+	rm.register(t, c2, "c2", time.Now().Add(-time.Minute))
+	if err := rm.open.inventory.SetUpgradeOf(t.Context(), "mailu", inventoryUpgrade("the migration week")); err != nil {
+		t.Fatal(err)
+	}
+	held, err := gatherHeldMoves(t.Context(), rm.open.inventory)
+	if err != nil || len(held) != 0 {
+		t.Fatalf("a machine holding only a person's own hold is asked: %+v (%v)", held, err)
+	}
+	if moves, _ := heldMovesOn(t.Context(), rm.open.inventory, mustMoveFacts(t, rm), "anchor"); len(moves) != 1 || !moves[0].Chosen {
+		t.Fatalf("status still names it, marked as chosen: %+v", moves)
+	}
+}
+
+// 1742/AC4 (integration): a registered build naming an image of the store that the store lacks is read as a missing
+// image on each machine that runs the module; one the store holds is not; and what the store holds is not asked twice.
+func TestARegisteredBuildNamingAnImageTheStoreLacksIsRead(t *testing.T) {
+	m := aMailu(true)
+	resourceOf(&m, "imap")["image"] = "artifact-store://mailu/imap@sha256:" + strings.Repeat("e", 64)
+	rm := aRecordedMesh(t, m)
+	asked := 0
+	lacking := func(_ context.Context, reference string) (bool, error) { asked++; return false, nil }
+	imagesHeld.Lock()
+	imagesHeld.held = map[string]bool{}
+	imagesHeld.Unlock()
+	got, err := gatherMissingImages(t.Context(), rm.open.inventory, lacking)
+	if err != nil || len(got) != 2 || got[0].Module != "mailu" || got[0].Node != "anchor" || got[1].Node != "laptop" {
+		t.Fatalf("missing %+v (%v)", got, err)
+	}
+	holding := func(_ context.Context, reference string) (bool, error) { asked++; return true, nil }
+	if got, err := gatherMissingImages(t.Context(), rm.open.inventory, holding); err != nil || len(got) != 0 {
+		t.Fatalf("an image the store holds is missing: %+v (%v)", got, err)
+	}
+	before := asked
+	if _, err := gatherMissingImages(t.Context(), rm.open.inventory, lacking); err != nil || asked != before {
+		t.Fatalf("an image the store was found to hold was asked about again (%d, %v)", asked-before, err)
+	}
+}

cmd/mesh-controller/held_moves_test.go

@@ -0,0 +1,237 @@
+package main
+
+import (
+	"context"
+	"errors"
+	"strings"
+	"testing"
+	"time"
+
+	"git.novox.be/novox/mesh-sdk/go/asks"
+	"github.com/novox/mesh-controller/internal/broker"
+	"github.com/novox/mesh-controller/internal/conditions"
+	"github.com/novox/mesh-controller/internal/inventory"
+)
+
+// **A move held for a person is asked of the person** (novox/hq issue 1732, issue 1320; ADR 0377, ADR 0259).
+
+// aHeldMailu is novox holding mailu's new build because it would recreate a container: the walk's own words.
+func aHeldMailu() heldFacts {
+	return heldFacts{node: "novox", moves: []heldMove{{Module: "mailu", From: "b2f5ebb2aaaa", To: "3259765dbbbb",
+		Why: "waits: recreates 1 of mailu's 12 container(s) (with a new image: automx)"}}}
+}
+
+func heldConditionOn(f *signalFacts) conditions.Condition {
+	o := watchMovesHeld(f)[0]
+	return conditions.Condition{Key: o.Key(), Kind: o.Kind, Severity: o.Severity, Headline: o.Headline,
+		Explanation: conditions.Verdict(o.Needs, o.Explanation), Needs: o.Needs, Actions: o.Actions}
+}
+
+// 1732/AC1: a machine holding a move of a recorded module for a person raises one condition for the operator, with
+// Release as its only answer: the machine's push, approved, naming the modules whose moves wait there.
+func TestAHeldMoveIsRaisedWithReleaseAsItsOnlyAction(t *testing.T) {
+	f := calm(time.Date(2026, 10, 21, 17, 30, 0, 0, time.UTC))
+	f.held = []heldFacts{aHeldMailu()}
+	got := watchMovesHeld(f)
+	if len(got) != 1 {
+		t.Fatalf("%+v", got)
+	}
+	o := got[0]
+	if o.Kind != "moves-held" || o.Scope != conditions.ScopeMachine || o.ID != "novox" || o.Severity != conditions.Warning ||
+		o.Resolver != conditions.ResolverOperator || o.Key() != "machine.novox.moves-held" {
+		t.Fatalf("kind, scope, subject, severity or resolver: %+v (%s)", o, o.Key())
+	}
+	if len(o.Actions) != 1 {
+		t.Fatalf("actions: %+v", o.Actions)
+	}
+	a := o.Actions[0]
+	if a.Label != "Release" || a.Verb != "mesh-controller.push" || a.Level != conditions.LevelApprove ||
+		a.Arguments["node"] != "novox" || a.Arguments["move"] != "mailu" || a.Arguments["cause"] != conditions.CauseOperatorAnswer {
+		t.Fatalf("the action is not the push of novox: %+v", a)
+	}
+	if _, takes := a.Arguments["why"]; !takes {
+		t.Fatal("the push takes a why, which the asker fills in with the operator's answer")
+	}
+	for _, want := range []string{"mailu", "novox"} {
+		if !strings.Contains(o.Headline+o.Explanation, want) {
+			t.Errorf("the words do not name %q: %q / %q", want, o.Headline, o.Explanation)
+		}
+	}
+	if !strings.Contains(o.Said, "recreates 1 of mailu's 12") {
+		t.Errorf("the evidence does not carry the walk's own words: %q", o.Said)
+	}
+	if w := (conditions.Observation{Headline: o.Headline, Explanation: o.Explanation, Needs: o.Needs, Resolved: o.Resolved}); w.Headline == "" || len(o.Headline) > conditions.HeadlineMax {
+		t.Errorf("headline: %q", o.Headline)
+	}
+}
+
+// 1732/AC2: a machine with nothing held raises nothing, so the condition ends the look after the move is sent.
+func TestAMachineHoldingNothingRaisesNoHeldMoveCondition(t *testing.T) {
+	f := calm(time.Date(2026, 10, 21, 17, 30, 0, 0, time.UTC))
+	if got := watchMovesHeld(f); len(got) != 0 {
+		t.Fatalf("%+v", got)
+	}
+}
+
+// 1732/AC3: the condition is asked on a channel at the approve level in words that say what Release does, and the
+// operator's warrant calls the controller's own push with the machine and the modules, once.
+func TestAHeldMovesReleaseIsAskedAndAWarrantPushesTheMachine(t *testing.T) {
+	f := calm(time.Date(2026, 10, 21, 17, 30, 0, 0, time.UTC))
+	f.held = []heldFacts{aHeldMailu()}
+	c := heldConditionOn(f)
+	r := newAskerRig(t)
+	r.open = []conditions.Condition{c}
+	if err := r.a.reconcile(context.Background()); err != nil {
+		t.Fatal(err)
+	}
+	sent := r.asksSent(t)
+	if len(sent) != 1 || len(sent[0].Options) != 1 {
+		t.Fatalf("asked %+v", sent)
+	}
+	o := sent[0].Options[0]
+	if o.Label != "Release" || o.Level != asks.Approve || o.Does != "the held builds are sent to novox" {
+		t.Errorf("the option is %+v", o)
+	}
+	if err := sent[0].Check(r.now); err != nil {
+		t.Errorf("the ask is refused as made: %v", err)
+	}
+	w := r.warrantFor(t, c.Key, "Release")
+	answerWith(t, r, w)
+	answerWith(t, r, w)
+	if len(r.called) != 1 || !strings.HasPrefix(r.called[0], "mesh-controller.push@ ") ||
+		!strings.Contains(r.called[0], `"node":"novox"`) || !strings.Contains(r.called[0], `"move":"mailu"`) ||
+		!strings.Contains(r.called[0], `"cause":"`+conditions.CauseOperatorAnswer+`"`) ||
+		!strings.Contains(r.called[0], "chose Release") {
+		t.Fatalf("called %v", r.called)
+	}
+}
+
+// 1732/AC4: the controller may call its own push and upgrade verbs on a warrant: the grant names them.
+func TestTheControllerMayActOnAWarrantForPushAndUpgrade(t *testing.T) {
+	for _, verb := range []string{"push", "upgrade"} {
+		granted := false
+		for _, v := range broker.VerbsTheControllerActsOnAWarrant {
+			granted = granted || (v.Seat == broker.ControllerSeat && v.Verb == verb)
+		}
+		if !granted {
+			t.Errorf("the controller may not act on a warrant for %s", verb)
+		}
+	}
+}
+
+func aDoneMailuPlan() inventory.Plan {
+	return inventory.Plan{ID: "plan-1792585970446304628", Repository: "novox/mesh-catalog", State: inventory.PlanDone,
+		Tiers: [][]string{{"a"}, {"b"}, {"mailu"}},
+		Modules: map[string]*inventory.PlanModule{"mailu": {State: "built", Commit: "3259765dbbbbcccc",
+			Recorded: map[string]string{"novox": "waits: recreates 1 of mailu's 12 container(s)"}}}}
+}
+
+// 1732/AC5: a done plan that carries a move a machine still holds for a person says so on its line; once the machine
+// no longer holds it, or holds another build of the module, the line says nothing more.
+func TestADonePlanSaysWhatItHoldsForAPerson(t *testing.T) {
+	p := aDoneMailuPlan()
+	line := planLine(p, time.Date(2026, 10, 21, 16, 0, 0, 0, time.UTC)) + heldSaid(p, []heldFacts{aHeldMailu()})
+	if !strings.Contains(line, "done, 3 tier(s)") || !strings.Contains(line, "1 held for a person: mailu on novox") {
+		t.Errorf("the line: %q", line)
+	}
+	if said := heldSaid(p, nil); said != "" {
+		t.Errorf("a plan whose moves were sent says %q", said)
+	}
+	other := aHeldMailu()
+	other.moves[0].To = "9999999ffff"
+	if said := heldSaid(p, []heldFacts{other}); said != "" {
+		t.Errorf("a plan older than the build now held says %q", said)
+	}
+	p.Modules["mailu"].Recorded = map[string]string{"novox": recordedRollsWhy}
+	if said := heldSaid(p, []heldFacts{aHeldMailu()}); said != "" {
+		t.Errorf("a move the plan sent says %q", said)
+	}
+}
+
+// 1732/AC6: the builds held after a failed release are asked of the operator: the held-release condition offers
+// Release, which calls the controller's own `upgrade` with release-backlog and nothing else, once, on a warrant.
+func TestTheBuildsHeldAfterAFailedReleaseAreAskedAndReleasedOnAWarrant(t *testing.T) {
+	saved := backlogNow
+	t.Cleanup(func() { backlogNow = saved })
+	backlogNow.held = "release-1792595552499982311 failed (failed on novox); what waits is released again by a person"
+	backlogNow.waiting = map[string][]inventory.CarriedMove{"novox": {{Module: "indexer"}, {Module: "nextcloud"}}}
+	got := backlogObservation()
+	if len(got) != 1 || len(got[0].Actions) != 1 {
+		t.Fatalf("raised %+v", got)
+	}
+	a := got[0].Actions[0]
+	if a.Label != "Release" || a.Verb != "mesh-controller.upgrade" || a.Level != conditions.LevelApprove ||
+		a.Arguments["release-backlog"] != "true" || a.Arguments["cause"] != conditions.CauseOperatorAnswer {
+		t.Fatalf("the action: %+v", a)
+	}
+	o := got[0]
+	c := conditions.Condition{Key: o.Key(), Kind: o.Kind, Severity: o.Severity, Headline: o.Headline,
+		Explanation: conditions.Verdict(o.Needs, o.Explanation), Needs: o.Needs, Actions: o.Actions}
+	r := newAskerRig(t)
+	r.open = []conditions.Condition{c}
+	if err := r.a.reconcile(context.Background()); err != nil {
+		t.Fatal(err)
+	}
+	sent := r.asksSent(t)
+	if len(sent) != 1 || len(sent[0].Options) != 1 || sent[0].Options[0].Does != "the builds held after the failed delivery are released" {
+		t.Fatalf("asked %+v", sent)
+	}
+	w := r.warrantFor(t, c.Key, "Release")
+	answerWith(t, r, w)
+	answerWith(t, r, w)
+	if len(r.called) != 1 || !strings.HasPrefix(r.called[0], "mesh-controller.upgrade@ ") ||
+		!strings.Contains(r.called[0], `"release-backlog":"true"`) || !strings.Contains(r.called[0], "chose Release") {
+		t.Fatalf("called %v", r.called)
+	}
+}
+
+// 1732/AC7: a plan whose send waits for a gate while the builds are held after a failed release reads as waiting for
+// a person to release them, not "building ... LATE"; with nothing held it still reads as the wait it is.
+func TestAPlanWaitingForAGateBehindAFailedReleaseIsNotLate(t *testing.T) {
+	saved := backlogNow
+	t.Cleanup(func() { backlogNow = saved })
+	now := time.Date(2026, 10, 21, 18, 50, 0, 0, time.UTC)
+	p := inventory.Plan{ID: "plan-1", Repository: "novox/mesh-sdk", Commit: "c0ffee00", State: inventory.PlanBuilding,
+		Tiers: [][]string{{"indexer"}}, TierEntered: now.Add(-100 * time.Minute), Created: now.Add(-110 * time.Minute),
+		Modules: map[string]*inventory.PlanModule{"indexer": {State: "built"}},
+		Note:    refusalNote(0, errors.New("a build waits there for its gate: novox"))}
+	backlogNow.held = ""
+	if line := planLine(p, now); !strings.Contains(line, "a build waits there for its gate: novox") {
+		t.Errorf("the wait is not said: %q", line)
+	}
+	backlogNow.held = "release-1 failed (failed on novox); what waits is released again by a person"
+	line := planLine(p, now)
+	if strings.Contains(line, "LATE") || strings.Contains(line, "building") ||
+		!strings.Contains(line, "until a person releases it") {
+		t.Errorf("a plan held behind a failed release reads %q", line)
+	}
+}
+
+// 1732/AC10: a machine that also holds a move a person chose to hold gets no Release, since a push would send that move
+// too; the condition names both and says the push is the controller's terminal. A machine with only asked moves keeps it.
+func TestAMachineAlsoHoldingAPersonsOwnHoldIsOfferedNoRelease(t *testing.T) {
+	f := calm(time.Date(2026, 10, 21, 17, 30, 0, 0, time.UTC))
+	h := aHeldMailu()
+	h.moves = append(h.moves, heldMove{Module: "nftables", From: "n1aaaa", To: "n2bbbb",
+		Why: "waits: a person set it to record, and holds every move of it until they push", Chosen: true})
+	f.held = []heldFacts{h}
+	got := watchMovesHeld(f)
+	if len(got) != 1 || len(got[0].Actions) != 0 {
+		t.Fatalf("%+v", got)
+	}
+	o := got[0]
+	text := o.Headline + o.Explanation + o.Needs + o.Summary + o.Said
+	for _, want := range []string{"mailu", "nftables", "terminal", "push novox"} {
+		if !strings.Contains(text, want) {
+			t.Errorf("does not say %q: %q", want, text)
+		}
+	}
+	w := conditions.Words{Headline: o.Headline, Explanation: o.Explanation, Resolved: o.Resolved, Needs: o.Needs}
+	if why, ok := conditions.PlainWords(w, "novox"); !ok {
+		t.Errorf("not plain: %s", why)
+	}
+	f.held = []heldFacts{aHeldMailu()}
+	if got := watchMovesHeld(f); len(got) != 1 || len(got[0].Actions) != 1 || got[0].Actions[0].Arguments["move"] != "mailu" {
+		t.Fatalf("a machine with only asked moves: %+v", got)
+	}
+}

cmd/mesh-controller/image_missing.go

@@ -0,0 +1,245 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"slices"
+	"sort"
+	"strings"
+	"sync"
+
+	"git.novox.be/novox/mesh-sdk/go/catalogue"
+	"github.com/novox/mesh-controller/internal/artifacts"
+	"github.com/novox/mesh-controller/internal/conditions"
+	"github.com/novox/mesh-controller/internal/inventory"
+)
+
+// No declaration is sent that names an image the artifact store does not hold (novox/hq issue 1742).
+//
+// On 2026-10-21 at 17:13 a send to novox named `mailu/automx@sha256:c62150b8…`; the build record keeps that digest
+// ("recent-build") and the store did not hold it. The node-engine removed the running container, then could not pull
+// the replacement, and every later apply on novox failed for the next hour while the mail clients' autoconfiguration
+// had no backend. The node-engine's half (pull first, replace after) is its own change; this is the controller's: **a
+// module whose image the store lacks is left out of the declaration**, as a module whose setting nobody gave is
+// (ADR 0163, rule 6) — the node-engine keeps what it has of it and touches none of its containers — and **it is said**,
+// row S25: a condition naming the module, the machine and the image, until the store holds the image again (a new build
+// of the module, or the copy put back).
+//
+// Judged only for an image the store's own address names, from the send's own resources; an image of another registry
+// is no business of the store's. A store that cannot be asked judges nothing: a send is not refused for a question
+// that did not answer.
+
+// kindImageMissing is S25's kind: module.<module>.<machine>.image-missing.
+const kindImageMissing = "image-missing"
+
+// missingImage is a module held out of a machine's declaration because the store lacks an image it names.
+type missingImage struct {
+	Node, Module, Image string
+}
+
+// storeHolds is whether the store holds the manifest an image reference at its address names.
+type storeHolds func(ctx context.Context, reference string) (bool, error)
+
+// imageInStore is the artifact-store reference of an image the store's address names, "" for any other.
+func imageInStore(image, address string) string {
+	if address == "" || !strings.HasPrefix(image, address+"/") || !strings.Contains(image, "@sha256:") {
+		return ""
+	}
+	reference := catalogue.Recorded(image)
+	if _, ours := catalogue.InArtifactStore(reference); !ours {
+		return ""
+	}
+	return reference
+}
+
+// holdBackMissingImages leaves out of the declaration every module that names an image the store does not hold,
+// and answers what it left out. The module's resources go, it joins LeftOut with the reason, and its build stays the
+// one the machine was last sent (`was`).
+func holdBackMissingImages(ctx context.Context, node string, s *sendable, address string, holds storeHolds,
+	was map[string]string) []missingImage {
+	lacks := map[string]bool{} // reference → the store does not hold it; absent: not asked, or no answer
+	asked := map[string]bool{}
+	lacking := map[string]string{} // module → the image
+	for _, r := range s.Resources {
+		if fmt.Sprint(r["type"]) != "container" {
+			continue
+		}
+		image, _ := r["image"].(string)
+		reference := imageInStore(image, address)
+		module := s.moduleOf[fmt.Sprint(r["id"])]
+		if reference == "" || module == "" || lacking[module] != "" {
+			continue
+		}
+		if !asked[reference] {
+			asked[reference] = true
+			held, err := holds(ctx, reference)
+			// empty-on-error: the store did not answer, so nothing is held back for a question unanswered
+			lacks[reference] = err == nil && !held
+		}
+		if lacks[reference] {
+			lacking[module] = image
+		}
+	}
+	if len(lacking) == 0 {
+		return nil
+	}
+	kept := s.Resources[:0:0]
+	for _, r := range s.Resources {
+		if _, out := lacking[s.moduleOf[fmt.Sprint(r["id"])]]; !out {
+			kept = append(kept, r)
+		}
+	}
+	s.Resources = kept
+	if s.leftOutWhy == nil {
+		s.leftOutWhy = map[string]string{}
+	}
+	var found []missingImage
+	for module, image := range lacking {
+		s.leftOutWhy[module] = "its image " + image + " is not in the artifact store"
+		if !slices.Contains(s.LeftOut, module) {
+			s.LeftOut = append(s.LeftOut, module)
+		}
+		if s.Builds != nil {
+			if prior, sent := was[module]; sent {
+				s.Builds[module] = prior
+			} else {
+				delete(s.Builds, module)
+			}
+		}
+		found = append(found, missingImage{Node: node, Module: module, Image: image})
+	}
+	sort.Strings(s.LeftOut)
+	sort.Slice(found, func(i, j int) bool { return found[i].Module < found[j].Module })
+	return found
+}
+
+// withoutMissingImages is composeSend's last step: the store asked about the images the declaration names, the modules
+// whose image it lacks left out and kept in the ledger S25 reads. A store that cannot be found or asked leaves the
+// declaration as composed.
+func withoutMissingImages(ctx context.Context, open *stores, node string, s sendable) sendable {
+	inv := open.inventory
+	shelf, err := inv.Catalogue(ctx)
+	if err != nil {
+		return s
+	}
+	address, err := artifactStoreAddress(ctx, inv, shelf, node)
+	if err != nil || address == "" {
+		return s
+	}
+	sent, known, err := inv.SentBuilds(ctx, node)
+	if err != nil || !known {
+		sent = nil
+	}
+	store := artifacts.Store{Address: address}
+	found := holdBackMissingImages(ctx, node, &s, address, store.HoldsManifest, sent)
+	for _, m := range found {
+		fmt.Printf("%s: %s is left out of the declaration: its image %s is not in the artifact store\n", node, m.Module, m.Image)
+	}
+	return s
+}
+
+// imageFacts are the images S25 raises: a module whose registered build names an image the store lacks, on each machine
+// that runs it.
+type imageFacts struct {
+	missingImage
+}
+
+// imagesHeld remembers the images the store was found to hold: a stored image is named by its digest and stays what it
+// is, so it is asked about once; one it lacks is asked again at every look.
+var imagesHeld = struct {
+	sync.Mutex
+	held map[string]bool
+}{held: map[string]bool{}}
+
+// gatherMissingImages is every machine's module whose registered build — the one a send would carry — names an image of
+// the artifact store that the store does not hold. Read from the catalogue and the store, never from what a send did:
+// a push is a command of its own, and the serving controller's watchdog hears nothing of it.
+func gatherMissingImages(ctx context.Context, inv *inventory.Inventory, holds storeHolds) ([]imageFacts, error) {
+	shelf, err := inv.Catalogue(ctx)
+	if err != nil {
+		return nil, fmt.Errorf("the catalogue cannot be read: %w", err)
+	}
+	var out []imageFacts
+	for _, module := range sortedKeysOf(modulesOf(shelf)) {
+		for _, r := range shelf[module].Resources {
+			if fmt.Sprint(r["type"]) != "container" {
+				continue
+			}
+			image, _ := r["image"].(string)
+			if _, ours := catalogue.InArtifactStore(image); !ours || !strings.Contains(image, "@sha256:") {
+				continue
+			}
+			imagesHeld.Lock()
+			known := imagesHeld.held[image]
+			imagesHeld.Unlock()
+			if !known {
+				held, err := holds(ctx, image)
+				if err != nil {
+					return nil, fmt.Errorf("the artifact store cannot be asked about %s: %w", image, err)
+				}
+				if held {
+					imagesHeld.Lock()
+					imagesHeld.held[image] = true
+					imagesHeld.Unlock()
+					continue
+				}
+			} else {
+				continue
+			}
+			running, err := inv.Running(ctx, module)
+			if err != nil {
+				return nil, err
+			}
+			for _, node := range running {
+				out = append(out, imageFacts{missingImage{Node: node, Module: module, Image: image}})
+			}
+		}
+	}
+	return out, nil
+}
+
+// modulesOf is the shelf's modules as a map of names, for sortedKeysOf.
+func modulesOf(shelf map[string]catalogue.Manifest) map[string]string {
+	out := make(map[string]string, len(shelf))
+	for m := range shelf {
+		out[m] = m
+	}
+	return out
+}
+
+// watchMissingImages is S25: a module left out of a machine's declaration because the store lacks its image, said at
+// once. The condition ends when the store holds the image, or a send names another.
+func watchMissingImages(f *signalFacts) []conditions.Observation {
+	var out []conditions.Observation
+	for _, m := range f.images {
+		out = append(out, conditions.Observation{Scope: conditions.ScopeModule, ID: m.Module + "." + m.Node, Kind: kindImageMissing,
+			Machine: m.Node, Severity: conditions.Warning, Resolver: conditions.ResolverOperator,
+			Summary: fmt.Sprintf("%s is left out of every send to %s: its declaration names an image that the artifact store does "+
+				"not hold (the evidence names it); the running container is untouched", m.Module, m.Node),
+			Said:     "image " + m.Image + " is not in the store",
+			Headline: clipWords(conditions.Capital(m.Module)+" is not updated on "+m.Node, conditions.HeadlineMax),
+			Explanation: clipWords(fmt.Sprintf("The new version of %s names a container image that the mesh's store does not "+
+				"hold, so it was not sent to %s. What runs there is untouched, and the rest of %s is sent as usual.",
+				m.Module, m.Node, m.Node), conditions.ExplanationMax),
+			Needs:    fmt.Sprintf("build %s again; the details name the image.", m.Module),
+			Resolved: "Resolved: the store holds the image of " + m.Module + " again"})
+	}
+	return out
+}
+
+// gatherMissingImagesHere is gatherMissingImages asking the mesh's own artifact store; nothing to ask where the mesh has
+// none on its network yet.
+func gatherMissingImagesHere(ctx context.Context, inv *inventory.Inventory) ([]imageFacts, error) {
+	shelf, err := inv.Catalogue(ctx)
+	if err != nil {
+		return nil, fmt.Errorf("the catalogue cannot be read: %w", err)
+	}
+	address, err := artifactStoreAddress(ctx, inv, shelf, "")
+	if err != nil {
+		return nil, err
+	}
+	if address == "" {
+		return nil, nil
+	}
+	return gatherMissingImages(ctx, inv, artifacts.Store{Address: address}.HoldsManifest)
+}

cmd/mesh-controller/image_missing_test.go

@@ -0,0 +1,125 @@
+package main
+
+import (
+	"context"
+	"errors"
+	"strings"
+	"testing"
+	"time"
+
+	"github.com/novox/mesh-controller/internal/conditions"
+)
+
+// **No declaration is sent that names an image the artifact store does not hold** (novox/hq issue 1742).
+
+const storeAt = "novox.internal:5100"
+
+// automx is the image the send of 2026-10-21 17:13 named and the store lacked; the others are held.
+const (
+	automxImage = storeAt + "/mailu/automx@sha256:c62150b8e2cbcc18cb911b098c2877f928761a1e6251667f39ea18251ea35591"
+	imapImage   = storeAt + "/mailu/imap@sha256:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+)
+
+func aMailSend() sendable {
+	return sendable{
+		Resources: []map[string]any{
+			{"id": "mailu.automx", "type": "container", "image": automxImage},
+			{"id": "mailu.automx-config", "type": "file", "path": "/etc/automx.conf"},
+			{"id": "mailu.imap", "type": "container", "image": imapImage},
+			{"id": "other.web", "type": "container", "image": "docker.io/library/nginx@sha256:" + strings.Repeat("b", 64)},
+			{"id": "dns.dnsmasq", "type": "container", "image": storeAt + "/dnsmasq/main@sha256:" + strings.Repeat("c", 64)},
+		},
+		moduleOf: map[string]string{"mailu.automx": "automx", "mailu.automx-config": "automx", "mailu.imap": "mailu",
+			"other.web": "other", "dns.dnsmasq": "dnsmasq"},
+		Builds: map[string]string{"automx": "b2f5ebb2new", "mailu": "m2", "other": "o1", "dnsmasq": "d1"},
+	}
+}
+
+func storeHolding(missing ...string) (storeHolds, *[]string) {
+	var asked []string
+	return func(_ context.Context, reference string) (bool, error) {
+		asked = append(asked, reference)
+		for _, m := range missing {
+			if strings.Contains(reference, m) {
+				return false, nil
+			}
+		}
+		return true, nil
+	}, &asked
+}
+
+// 1742/AC1: given a send naming automx's image, which the store does not hold, when the declaration is judged, then
+// every resource of automx is out of it, automx is among the modules left out with the reason, its build is the one the
+// machine was last sent, and every other module — an image of another registry among them — is as composed.
+func TestAModuleWhoseImageTheStoreLacksIsLeftOutOfTheSend(t *testing.T) {
+	s := aMailSend()
+	holds, asked := storeHolding("mailu/automx@")
+	found := holdBackMissingImages(t.Context(), "novox", &s, storeAt, holds, map[string]string{"automx": "b2f5ebb2old"})
+	if len(found) != 1 || found[0].Module != "automx" || found[0].Node != "novox" || found[0].Image != automxImage {
+		t.Fatalf("found %+v", found)
+	}
+	var ids []string
+	for _, r := range s.Resources {
+		ids = append(ids, r["id"].(string))
+	}
+	if got := strings.Join(ids, ","); got != "mailu.imap,other.web,dns.dnsmasq" {
+		t.Errorf("the declaration keeps %s", got)
+	}
+	if len(s.LeftOut) != 1 || s.LeftOut[0] != "automx" || !strings.Contains(s.leftOutWhy["automx"], "not in the artifact store") {
+		t.Errorf("left out %v because %v", s.LeftOut, s.leftOutWhy)
+	}
+	if s.Builds["automx"] != "b2f5ebb2old" || s.Builds["mailu"] != "m2" || s.Builds["other"] != "o1" {
+		t.Errorf("builds %v", s.Builds)
+	}
+	for _, a := range *asked {
+		if strings.Contains(a, "docker.io") {
+			t.Errorf("the store was asked about an image of another registry: %s", a)
+		}
+	}
+}
+
+// 1742/AC2: given a module never sent to the machine, when its image is missing, then it has no build in the record of the
+// send; given the store does not answer, then nothing is held back for a question unanswered.
+func TestAnUnansweredStoreHoldsNothingBackAndANewModuleHasNoBuild(t *testing.T) {
+	s := aMailSend()
+	holds, _ := storeHolding("mailu/automx@")
+	found := holdBackMissingImages(t.Context(), "novox", &s, storeAt, holds, nil)
+	if len(found) != 1 {
+		t.Fatalf("%+v", found)
+	}
+	if _, has := s.Builds["automx"]; has {
+		t.Errorf("a module never sent is recorded as sent: %v", s.Builds)
+	}
+	s = aMailSend()
+	silent := func(context.Context, string) (bool, error) { return false, errors.New("registry: connection refused") }
+	if found := holdBackMissingImages(t.Context(), "novox", &s, storeAt, silent, nil); len(found) != 0 || len(s.LeftOut) != 0 ||
+		len(s.Resources) != 5 {
+		t.Errorf("an unanswered store held back %+v, left out %v", found, s.LeftOut)
+	}
+}
+
+// 1742/AC3: a module left out for its image raises a condition for the operator naming the module, the machine and the
+// image in the evidence, plain words, and no answer to give; a mesh whose images are all held raises nothing.
+func TestAMissingImageIsRaisedForTheOperator(t *testing.T) {
+	f := calm(time.Date(2026, 10, 21, 17, 40, 0, 0, time.UTC))
+	if got := watchMissingImages(f); len(got) != 0 {
+		t.Fatalf("%+v", got)
+	}
+	f.images = []imageFacts{{missingImage{Node: "novox", Module: "automx", Image: automxImage}}}
+	got := watchMissingImages(f)
+	if len(got) != 1 {
+		t.Fatalf("%+v", got)
+	}
+	o := got[0]
+	if o.Kind != "image-missing" || o.Key() != "module.automx.novox.image-missing" || o.Resolver != conditions.ResolverOperator ||
+		o.Severity != conditions.Warning || o.Machine != "novox" {
+		t.Fatalf("%+v (%s)", o, o.Key())
+	}
+	if !strings.Contains(o.Said, "c62150b8") || !strings.Contains(o.Headline+o.Explanation, "automx") {
+		t.Errorf("words: %q / %q / %q", o.Headline, o.Explanation, o.Said)
+	}
+	w := conditions.Words{Headline: o.Headline, Explanation: o.Explanation, Resolved: o.Resolved, Needs: o.Needs}
+	if why, ok := conditions.PlainWords(w, "novox"); !ok {
+		t.Errorf("not plain: %s", why)
+	}
+}

cmd/mesh-controller/issue529_test.go

@@ -31,7 +31,7 @@ func TestAWalkWaitingOnAHeldDeliveryNamesTheHold(t *testing.T) {
 		"check did not pass for the heads that merged — a person decides: `mesh-delivery.release` (id " +
 		"novox/mesh-sdk@d41d255f28ad, why) lets it go, `mesh-delivery.stop` ends it"
 	waits := walkWaits{p.ID: {{ID: "novox/mesh-sdk@d41d255f28ad", State: "held", Walk: p.ID, Says: held}}}
-	line := planLineSaid(p, now, pauseView{}, tierAtLeast, nil, waits)
+	line := planLineSaid(p, now, tierAtLeast, nil, waits)
 	for _, want := range []string{"held for a person", "composed check did not pass", "mesh-delivery.release"} {
 		if !strings.Contains(line, want) {
 			t.Fatalf("the line does not say %q: %q", want, line)
@@ -41,7 +41,7 @@ func TestAWalkWaitingOnAHeldDeliveryNamesTheHold(t *testing.T) {
 		t.Fatalf("a held walk's line points at a hand start: %q", line)
 	}
 	// Told nothing — an older mesh-delivery, or none answering — it reads as before.
-	if line := planLineSaid(p, now, pauseView{}, tierAtLeast, nil, nil); !strings.Contains(line, "starts it by hand") {
+	if line := planLineSaid(p, now, tierAtLeast, nil, nil); !strings.Contains(line, "starts it by hand") {
 		t.Fatalf("told nothing, the line reads %q", line)
 	}
 }
@@ -51,7 +51,7 @@ func TestAWalkWaitingOnADeliveryNotAtItsTurnSaysSo(t *testing.T) {
 	p := waitingWalk(now)
 	waits := walkWaits{p.ID: {{ID: "novox/mesh-sdk@9747f3e1b1ac", State: "published", Walk: p.ID,
 		Says: "not let go yet: novox/mesh-tools@3f0c1a6cec18 (published) carried by it not at its turn"}}}
-	line := planLineSaid(p, now, pauseView{}, tierAtLeast, nil, waits)
+	line := planLineSaid(p, now, tierAtLeast, nil, waits)
 	if !strings.Contains(line, "not at its turn") || !strings.Contains(line, "novox/mesh-tools@3f0c1a6cec18") {
 		t.Fatalf("the line reads %q", line)
 	}
@@ -69,7 +69,7 @@ func TestAWalkHeldByNothingSaysWhyAndTheHandStart(t *testing.T) {
 	waits := walkWaits{p.ID: {{ID: "novox/mesh-media-catalog@cdcdcdcd0000", State: "unheld", Walk: p.ID,
 		Says: "held by nothing: its merges' deliveries ended as nothing-to-move (novox/mesh-media-catalog@abababab0000), " +
 			"yet the walk moves nzbgeek, nzbget — nothing gives it its word"}}}
-	line := planLineSaid(p, now, pauseView{}, tierAtLeast, nil, waits)
+	line := planLineSaid(p, now, tierAtLeast, nil, waits)
 	if !strings.Contains(line, "ended as nothing-to-move") || !strings.Contains(line, "plans go "+p.ID) {
 		t.Fatalf("the line reads %q", line)
 	}

cmd/mesh-controller/issue611_test.go

@@ -35,7 +35,7 @@ func TestAMergeSaysTheModulesWhoseBuildSourceItLeftUnchanged(t *testing.T) {
 			{Own: true, Paths: []string{"modules/build-agent/Dockerfile", "modules/build-agent/module.json"}},
 		},
 		"route-proxy": {
-			{Repository: "novox/mesh-controller", Ref: "main", Paths: []string{"go.mod", "examples/route-proxy/"}},
+			{Repository: "novox/mesh-controller", Ref: "main", Paths: []string{"go.mod", "modules/route-proxy/cmd/route-proxy/"}},
 			{Own: true, Paths: []string{"modules/route-proxy/Dockerfile", "modules/route-proxy/module.json"}},
 		},
 	}

cmd/mesh-controller/key_takein.go

@@ -0,0 +1,623 @@
+package main
+
+import (
+	"archive/tar"
+	"bytes"
+	"compress/gzip"
+	"context"
+	"encoding/base64"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+	"path"
+	"sort"
+	"strings"
+	"time"
+
+	"git.novox.be/novox/mesh-sdk/go/buildstep"
+	"git.novox.be/novox/mesh-sdk/go/catalogue"
+	sdkdelivery "git.novox.be/novox/mesh-sdk/go/delivery"
+	"github.com/nats-io/nats.go/jetstream"
+	"github.com/novox/mesh-controller/internal/artifacts"
+	"github.com/novox/mesh-controller/internal/builderkeys"
+	"github.com/novox/mesh-controller/internal/buildreads"
+	"github.com/novox/mesh-controller/internal/inventory"
+	"github.com/novox/mesh-controller/internal/link"
+)
+
+// The take-in from the builder's done key (novox/hq ADR 0501, ADR 0498 §8, ADR 0453 §5; issue 1851).
+//
+// From R4e the controller asks no build but the builder's own module's: a module of a merge is taken from the builder's
+// key for the fingerprint the indexer's trunk value of the module names (ADR 0501 §2). Only a done key whose every
+// artifact names a reference is taken (ADR 0498 §8); a key not done yet, one waiting for a reference, a templates
+// archive the store does not answer, or a list of predefined keys the forge does not answer is waited for and said,
+// never failed and never delivered from. A failed key fails, in the builder's own words. The take-in then records the
+// key as a build of today's record layout, so a controller of before reads it on a rollback, and judges it as every
+// build is judged (registerJudged).
+
+// errKeyWaits says a take-in from a key waits: for the builder, a reference, the store or the forge. Never a failure.
+var errKeyWaits = errors.New("waits")
+
+// errKeyFailed says the module's key failed: the builder's own words follow.
+var errKeyFailed = errors.New("the builder's key failed")
+
+// keyReads is what a take-in from a key reads of the builder and the indexer (builderkeys.Reader, or a test's).
+type keyReads interface {
+	Build(ctx context.Context, module, fp string) (builderkeys.Key, error)
+	Manifest(ctx context.Context, digest string) (sdkdelivery.Manifest, error)
+}
+
+// keyBuildID is the id a key's build is recorded under: the key and its revision, so the same revision recorded twice
+// is one record, and a rebuild of the same fingerprint (a new revision, ADR 0429 §18) another.
+func keyBuildID(k builderkeys.Key) string {
+	part, err := sdkdelivery.FingerprintKeyPart(k.Fingerprint)
+	if err != nil {
+		part = strings.TrimPrefix(k.Fingerprint, sdkdelivery.SourcePrefix2)
+	}
+	return fmt.Sprintf("key-%s-%d", part, k.Revision)
+}
+
+// readArchive is the archive a key's reference names, read from the artifact store and checked against its digest. A
+// variable so a test needs no store.
+var readArchive = func(ctx context.Context, inv *inventory.Inventory, reference string) ([]byte, error) {
+	shelf, err := inv.Catalogue(ctx)
+	if err != nil {
+		return nil, err
+	}
+	address, err := artifactStoreAddress(ctx, inv, shelf, "")
+	if err != nil {
+		return nil, err
+	}
+	if address == "" {
+		return nil, errors.New("the artifact store is on no network the controller reaches")
+	}
+	return artifacts.Store{Address: address}.GetBlob(ctx, reference)
+}
+
+// holdArtifact holds what a key's reference names in the artifact store: Gone when the store does not hold it, an
+// archive held by its manifest besides. A variable so a test needs no store.
+var holdArtifact = func(ctx context.Context, inv *inventory.Inventory, reference string) error {
+	shelf, err := inv.Catalogue(ctx)
+	if err != nil {
+		return err
+	}
+	address, err := artifactStoreAddress(ctx, inv, shelf, "")
+	if err != nil {
+		return err
+	}
+	if address == "" {
+		// A mesh being raised has no store on its network yet (as the sweep, which collects nothing there): nothing
+		// can be held, and waiting for the store would keep the store itself from being taken in. Said, never silent.
+		fmt.Printf("the artifact store is on no network the controller reaches, so %s is taken in without being held\n",
+			reference)
+		return nil
+	}
+	store := artifacts.Store{Address: address}
+	if err := store.Holds(ctx, reference); err != nil {
+		return err
+	}
+	_, err = store.Hold(ctx, reference)
+	return err
+}
+
+// predefinedHead is the list of predefined keys at the head of the catalogue repository's trunk, and that head.
+type predefinedHead struct {
+	List       catalogue.PredefinedList
+	Repository string
+	Commit     string
+	// Generation orders two heads of the trunk: the head's commit time in seconds. A list kept from a build's
+	// generation (its commit count) is always older than a head read here.
+	Generation int
+}
+
+// predefinedAtTrunk is the list of predefined keys at the head of the catalogue repository's trunk (ADR 0501 §8), read
+// from the forge. A variable so a test needs no forge.
+var predefinedAtTrunk = func(ctx context.Context, inv *inventory.Inventory) (predefinedHead, error) {
+	entries, err := inv.Catalogued(ctx)
+	if err != nil {
+		return predefinedHead{}, err
+	}
+	return readPredefinedHead(ctx, entries, formsOfSources(ctx, inv))
+}
+
+// formsOfSources reads how the sources are spelled on this mesh; a variable so a test names the forge's address.
+var formsOfSources = newSourceForms
+
+// errNoCatalogueRepository says no module of the mesh is built from the catalogue's repository on the forge: not a wait,
+// since no read of the forge makes one appear (issue 1902); the plan fails with these words.
+var errNoCatalogueRepository = errors.New("no module of the catalogue names the repository " +
+	catalogue.CatalogueRepository + " on the forge")
+
+// catalogueRepositoryAmong is the catalogue's repository on the forge, as owner/name, found as catch-up finds the trunks
+// of the repositories the catalogue builds from: a source in the URL form or the seat form, `.git` dropped (issue 1902).
+func catalogueRepositoryAmong(entries []inventory.Entry, forms *sourceForms) (string, error) {
+	for _, e := range entries {
+		if e.Source.Repository == "" {
+			continue
+		}
+		owner, name, onForge := forms.onTheForge(e.Source.Repository, e.Source.Seat)
+		if onForge && strings.EqualFold(name, catalogue.CatalogueRepository) {
+			return owner + "/" + name, nil
+		}
+	}
+	return "", errNoCatalogueRepository
+}
+
+// readPredefinedHead is the list at the trunk head of the catalogue's repository, found among the modules' sources and
+// read from the forge.
+func readPredefinedHead(ctx context.Context, entries []inventory.Entry, forms *sourceForms) (predefinedHead, error) {
+	// A URL source is on the forge only once the forge's address is known; an address that cannot be read is a wait.
+	if _, err := forms.forgeAddress(ctx, forgeAddressWait); err != nil {
+		return predefinedHead{}, fmt.Errorf("the forge's address cannot be read: %w", err)
+	}
+	repository, err := catalogueRepositoryAmong(entries, forms)
+	if err != nil {
+		return predefinedHead{}, err
+	}
+	var heads []struct {
+		SHA    string `json:"sha"`
+		Commit struct {
+			Committer struct {
+				Date time.Time `json:"date"`
+			} `json:"committer"`
+		} `json:"commit"`
+	}
+	if err := askGitea(ctx, "gitea_api", map[string]any{"path": "/repos/" + repository +
+		"/commits?limit=1&stat=false&verification=false&files=false"}, &heads); err != nil {
+		return predefinedHead{}, err
+	}
+	if len(heads) == 0 || heads[0].SHA == "" {
+		return predefinedHead{}, fmt.Errorf("the forge named no head of %s's trunk", repository)
+	}
+	head := predefinedHead{Repository: repository, Commit: heads[0].SHA,
+		Generation: int(heads[0].Commit.Committer.Date.Unix())}
+	var file struct {
+		Content  string `json:"content"`
+		Encoding string `json:"encoding"`
+	}
+	if err := askGitea(ctx, "gitea_api", map[string]any{"path": "/repos/" + repository + "/contents/" +
+		catalogue.PredefinedFile + "?ref=" + head.Commit}, &file); err != nil {
+		return predefinedHead{}, err
+	}
+	if file.Encoding != "base64" {
+		return predefinedHead{}, fmt.Errorf("the forge answered %s at %.8s in the encoding %q", catalogue.PredefinedFile,
+			head.Commit, file.Encoding)
+	}
+	raw, err := base64.StdEncoding.DecodeString(file.Content)
+	if err != nil {
+		return predefinedHead{}, err
+	}
+	if head.List, err = catalogue.ParsePredefined(raw); err != nil {
+		return predefinedHead{}, fmt.Errorf("%s at %.8s is refused: %w", catalogue.PredefinedFile, head.Commit, err)
+	}
+	return head, nil
+}
+
+// askGitea asks the forge's module one tool on the bus and reads its result into into.
+var askGitea = func(ctx context.Context, tool string, args map[string]any, into any) error {
+	js, err := aBus()
+	if err != nil {
+		return err
+	}
+	defer js.Close()
+	raw, _ := json.Marshal(args)
+	answer, err := link.Ask(ctx, link.OverNATS{Conn: js.Conn()}, "gitea", tool, raw, 30*time.Second)
+	if err != nil {
+		return err
+	}
+	if answer.Error != "" {
+		return fmt.Errorf("gitea.%s: %s", tool, answer.Error)
+	}
+	var wrapped struct {
+		Result json.RawMessage `json:"result"`
+	}
+	if err := json.Unmarshal(answer.Result, &wrapped); err != nil {
+		return err
+	}
+	return json.Unmarshal(wrapped.Result, into)
+}
+
+// keyTake is one take-in from a key: the module, the indexer's trunk value naming the key's fingerprint, and the
+// registration's warrant.
+type keyTake struct {
+	Module string
+	Trunk  sdkdelivery.Module
+	Ask    registrationAsk
+	// Hand names, by artifact, the references the controller's terminal registers the module at instead of a key's
+	// (ADR 0526 clause 3, `register --reference`): the key, when the builder has one, supplies the artifacts not named
+	// here. Nil for every take-in but that one.
+	Hand map[string]string
+}
+
+// takeInKey takes a module in from the builder's key for the fingerprint its trunk value names: records the key as a
+// build and registers the module, or says why not. errKeyWaits when it waits, errKeyFailed when the key failed.
+func takeInKey(ctx context.Context, inv *inventory.Inventory, keys keyReads, t keyTake) (
+	catalogue.Manifest, inventory.Build, error) {
+	head, err := predefinedAtTrunk(ctx, inv)
+	if errors.Is(err, errNoCatalogueRepository) {
+		// Fails the plan, loudly, with these words (issue 1902): waiting would never end.
+		return catalogue.Manifest{}, inventory.Build{}, fmt.Errorf("%s is not judged: %w", t.Module, err)
+	}
+	if err != nil {
+		return catalogue.Manifest{}, inventory.Build{}, fmt.Errorf("%w: the list of predefined keys at the catalogue's "+
+			"trunk head cannot be read, so %s is not judged: %v", errKeyWaits, t.Module, err)
+	}
+	keepPredefinedHead(ctx, inv, head)
+	previous, err := inv.Builds(ctx, t.Module, 5)
+	if err != nil {
+		return catalogue.Manifest{}, inventory.Build{}, err
+	}
+	kept, manifest, err := buildOfKey(ctx, keys, t, keyContext{list: head.List, previous: previous,
+		archive: func(ctx context.Context, reference string) ([]byte, error) { return readArchive(ctx, inv, reference) },
+		hold:    func(ctx context.Context, reference string) error { return holdArtifact(ctx, inv, reference) }})
+	if err != nil {
+		return catalogue.Manifest{}, kept, err
+	}
+	if err := inv.RecordBuild(ctx, kept); err != nil {
+		return catalogue.Manifest{}, kept, err
+	}
+	recorded := inventory.Source{Repository: t.Trunk.Repository, Seat: gitSeat, Path: keyPath(t.Trunk),
+		BuiltFrom: t.Trunk.Commit, Head: t.Trunk.Commit, Against: kept.Against}
+	trunk := "main"
+	if was, err := inv.SourceOf(ctx, manifest.Module); err == nil {
+		recorded.Ref = followedBranch(was.Ref)
+		if recorded.Ref != "" {
+			trunk = recorded.Ref
+		}
+	}
+	registered, err := registerJudged(ctx, inv, takenBuild{kept: kept, manifest: manifest, recorded: recorded,
+		ask: t.Ask, path: recorded.Path, trunk: trunk, by: "the builder", what: t.Trunk.Repository,
+		commit: t.Trunk.Commit})
+	return registered, kept, err
+}
+
+// keyContext is what a key's build is made with besides the key: the list of predefined keys its manifest is judged
+// against, the module's recent builds (the bases its last one stood on are carried) and how an archive is read.
+type keyContext struct {
+	list     catalogue.PredefinedList
+	previous []inventory.Build
+	archive  func(ctx context.Context, reference string) ([]byte, error)
+	// hold holds one artifact the key names in the artifact store, artifacts.Gone when the store does not hold it.
+	hold func(ctx context.Context, reference string) error
+}
+
+// keyPath is a module's directory as the catalogue records it: empty for a module at its repository's root.
+func keyPath(m sdkdelivery.Module) string {
+	if m.Path == sdkdelivery.RootPath {
+		return ""
+	}
+	return strings.Trim(m.Path, "/")
+}
+
+// buildOfKey reads the key of the trunk value's fingerprint and makes its build record and the manifest it resolves to
+// (ADR 0498 §8, ADR 0501 §1, §8): the module's manifest by the key's digest, judged against the list of predefined keys
+// at the catalogue's trunk head, resolved with the key's artifacts.
+func buildOfKey(ctx context.Context, keys keyReads, t keyTake, kc keyContext) (
+	inventory.Build, catalogue.Manifest, error) {
+	waits := func(format string, a ...any) (inventory.Build, catalogue.Manifest, error) {
+		return inventory.Build{}, catalogue.Manifest{}, fmt.Errorf("%w: "+format, append([]any{errKeyWaits}, a...)...)
+	}
+	if t.Trunk.FP2 == "" && t.Hand == nil {
+		why := t.Trunk.None2
+		if why == "" {
+			why = "the indexer wrote no fingerprint of the new form"
+		}
+		return waits("%s at %.8s has no fingerprint to take a build by: %s", t.Module, t.Trunk.Commit, why)
+	}
+	k, err := keys.Build(ctx, t.Module, t.Trunk.FP2)
+	if t.Hand != nil {
+		// **Registered at a reference, no key needed** (ADR 0526 clause 3): the key the builder holds, if any, is the
+		// start; the references given replace or add its artifacts, and the key counts as done.
+		k = handKey(t, k)
+		err = nil
+	}
+	if err != nil {
+		return waits("%s's key cannot be read: %v", t.Module, err)
+	}
+	switch {
+	case k.Failed():
+		return inventory.Build{}, catalogue.Manifest{}, fmt.Errorf("%w: %s", errKeyFailed, k.Says())
+	case !k.Done():
+		return waits("%s", k.Says())
+	case len(k.Unreferenced()) > 0:
+		return waits("%s", k.Says())
+	}
+	src, err := keys.Manifest(ctx, k.Build.Manifest)
+	if err != nil {
+		return waits("%s's manifest: %v", t.Module, err)
+	}
+	manifest, err := catalogue.ParseManifestWith([]byte(src.JSON), kc.list)
+	if err != nil {
+		// **A word the running controller does not read waits for the controller that reads it** (ADR 0501 §7): the
+		// key stays done, and the controller that reads the word registers it with no second build.
+		if word := refusedWord(err.Error()); word != "" {
+			return waits("%s's manifest uses the word %q, which this controller does not read: it is registered "+
+				"when a controller that reads it runs", t.Module, word)
+		}
+		return inventory.Build{}, catalogue.Manifest{}, fmt.Errorf("the builder built %s and its manifest is "+
+			"refused: %w", t.Module, err)
+	}
+	if manifest.Module != t.Module {
+		return inventory.Build{}, catalogue.Manifest{}, fmt.Errorf("the key of %s names the manifest of %s",
+			t.Module, manifest.Module)
+	}
+	if t.Hand != nil {
+		if err := handCoversEvery(manifest, k, t.Hand); err != nil {
+			return inventory.Build{}, catalogue.Manifest{}, err
+		}
+	}
+	// **Every artifact held in the store before anything is recorded** (novox/hq issue 1933): a definition naming an
+	// archive the store does not hold is sent, and every machine assigned the module fails its apply on the 404. An
+	// archive is held by its manifest, so the store's own collector keeps it too.
+	if kc.hold != nil {
+		for _, a := range k.Build.Artifacts {
+			reference := catalogue.Recorded(a.Reference)
+			if _, ours := catalogue.InArtifactStore(reference); !ours {
+				continue
+			}
+			err := kc.hold(ctx, reference)
+			switch {
+			case err == nil, errors.Is(err, artifacts.ErrNotOurs):
+			case errors.Is(err, artifacts.Gone):
+				return inventory.Build{}, catalogue.Manifest{}, fmt.Errorf("the builder's key of %s names %s for its "+
+					"artifact %q, which is not in the artifact store: nothing was recorded or registered, and the key "+
+					"must be built again", t.Module, reference, a.Name)
+			default:
+				return waits("the artifact store could not hold %s's artifact %q (%s): %v", t.Module, a.Name, reference, err)
+			}
+		}
+	}
+	built, err := builtOfKey(ctx, kc.archive, manifest, k)
+	if err != nil {
+		return waits("%v", err)
+	}
+	resolved, err := manifest.Resolve(built)
+	if err != nil {
+		return inventory.Build{}, catalogue.Manifest{}, fmt.Errorf("the builder built %s and it does not resolve: %w",
+			t.Module, err)
+	}
+	raw, err := json.Marshal(resolved)
+	if err != nil {
+		return inventory.Build{}, catalogue.Manifest{}, err
+	}
+	kept := inventory.Build{ID: keyBuildID(k), Repository: t.Trunk.Repository, Module: t.Module,
+		Commit: t.Trunk.Commit, On: k.Build.By, Path: keyPath(t.Trunk), Manifest: raw,
+		SourceFingerprint: k.Fingerprint, At: time.Now().UTC()}
+	// **Read from the manifest, fresh at every key** (the same rule build-agent says, internal/buildreads). Sources are
+	// left unsaid but for a module whose every artifact names its paths: the planner then reads the module's whole
+	// directory, over-planning and never under-planning, and a fingerprint that did not change moves nothing (R4e A9).
+	// **Its build source where its every artifact names its paths** (novox/hq ADR 0499 §1, §5; issue 1758, B1): the
+	// planner reads a merge's changed files against those paths and the manifest alone, so a change elsewhere in the
+	// module's directory touches nothing it builds from.
+	if own := pathsBuildSource(manifest, keyPath(t.Trunk)); own != nil {
+		kept.Sources = []inventory.BuildSource{{Paths: own}}
+	}
+	for _, c := range buildreads.Of(manifest) {
+		kept.Read = append(kept.Read, inventory.ReadRepository{Repository: c.Repository, Ref: c.Ref})
+	}
+	// **The bases its last build stood on, carried** (R4e, lead decision): what the collector keeps a mirrored base by.
+	// A key names none; the module's newest successful build's are carried so the keep set does not change.
+	for _, b := range kc.previous {
+		if b.Worked() && b.Module == t.Module && b.ID != kept.ID {
+			kept.Against = append([]string(nil), b.Against...)
+			break
+		}
+	}
+	if t.Hand != nil {
+		// A build made by hand, said so: the id is its own, so it never reads as the builder's key.
+		kept.ID, kept.On = "hand-"+keyBuildID(k)+"-"+time.Now().UTC().Format("20060102T150405Z"), "hand"
+	}
+	for _, a := range k.Build.Artifacts {
+		kept.Made = append(kept.Made, inventory.Artifact{Name: a.Name, Kind: kindOf(manifest, a),
+			Reference: catalogue.Recorded(a.Reference)})
+	}
+	return kept, resolved, nil
+}
+
+// kindOf is an artifact's kind: the key's, else the manifest's.
+func kindOf(m catalogue.Manifest, a sdkdelivery.BuiltArtifact) string {
+	if a.Kind != "" || m.Build == nil {
+		return a.Kind
+	}
+	for _, d := range m.Build.Artifacts {
+		if d.Name == a.Name {
+			return d.Kind
+		}
+	}
+	return ""
+}
+
+// builtOfKey is each of a done key's artifacts as Resolve reads it: its reference and digest, a TypeScript bundle's
+// launchers by the build modules' one rule (mesh-sdk buildstep.Launchers), and, for the archive a module packs its
+// templates into, each template's text read back from the archive the store holds under the key's reference.
+func builtOfKey(ctx context.Context, archive func(context.Context, string) ([]byte, error), m catalogue.Manifest,
+	k builderkeys.Key) (
+	[]catalogue.Built, error) {
+	declared := map[string]catalogue.Artifact{}
+	if m.Build != nil {
+		for _, a := range m.Build.Artifacts {
+			declared[a.Name] = a
+		}
+	}
+	templates := ""
+	if m.Templated() {
+		templates = catalogue.TemplatesArtifact(m)
+	}
+	var out []catalogue.Built
+	for _, a := range k.Build.Artifacts {
+		d := declared[a.Name]
+		b := catalogue.Built{Name: a.Name, Kind: kindOf(m, a), Reference: catalogue.Recorded(a.Reference),
+			Digest: a.Digest}
+		if launchers := buildstep.Launchers(d.Language, d.Entrypoints); len(launchers) > 0 {
+			b.Launchers = launchers
+		}
+		if a.Name == templates && templates != "" {
+			body, err := archive(ctx, b.Reference)
+			if err != nil {
+				return nil, fmt.Errorf("the templates archive %q of %s cannot be read from the artifact store: %v",
+					a.Name, m.Module, err)
+			}
+			if b.Texts, err = unpackTexts(body); err != nil {
+				return nil, fmt.Errorf("the templates archive %q of %s cannot be read back: %v", a.Name, m.Module, err)
+			}
+		}
+		out = append(out, b)
+	}
+	return out, nil
+}
+
+// unpackTexts is every file of a packed templates archive (gzip over tar), by its path inside it.
+func unpackTexts(body []byte) (map[string]string, error) {
+	zipped, err := gzip.NewReader(bytes.NewReader(body))
+	if err != nil {
+		return nil, err
+	}
+	defer zipped.Close()
+	reader := tar.NewReader(zipped)
+	texts := map[string]string{}
+	for {
+		header, err := reader.Next()
+		if errors.Is(err, io.EOF) {
+			return texts, nil
+		}
+		if err != nil {
+			return nil, err
+		}
+		if header.Typeflag != tar.TypeReg {
+			continue
+		}
+		text, err := io.ReadAll(io.LimitReader(reader, 16<<20))
+		if err != nil {
+			return nil, err
+		}
+		texts[strings.TrimPrefix(header.Name, "./")] = string(text)
+	}
+}
+
+// keepPredefinedHead keeps the list read at the catalogue's trunk head when it is newer than the one kept, as a build of
+// the catalogue's did (ADR 0348 §7), and judges every manifest read again against it. Said, never fatal: the list read
+// is the one this take-in judges against either way.
+func keepPredefinedHead(ctx context.Context, inv *inventory.Inventory, head predefinedHead) {
+	kept, err := inv.KeepPredefined(ctx, inventory.PredefinedRecord{Keys: head.List, Repository: head.Repository,
+		Commit: head.Commit, Generation: head.Generation, Build: "the trunk head " + short(head.Commit)})
+	if err != nil {
+		fmt.Printf("the list of predefined keys at %s's trunk head %s is not kept: %v\n", head.Repository,
+			short(head.Commit), err)
+		return
+	}
+	if kept {
+		fmt.Printf("the list of predefined keys at %s's trunk head %s is published: %s\n", head.Repository,
+			short(head.Commit), strings.Join(head.List.Keys(), ", "))
+	}
+	if err := loadPredefined(ctx, inv); err != nil {
+		fmt.Printf("the list of predefined keys kept cannot be read: %v\n", err)
+	}
+}
+
+// openBuilderKeys is the builder's and the indexer's buckets, read on a connection for the moment.
+func openBuilderKeys() (builderkeys.Reader, func(), error) {
+	js, err := aBus()
+	if err != nil {
+		return builderkeys.Reader{}, nil, err
+	}
+	api, err := jetstream.New(js.Conn())
+	if err != nil {
+		js.Close()
+		return builderkeys.Reader{}, nil, err
+	}
+	return builderkeys.Reader{JS: api}, js.Close, nil
+}
+
+// pathsBuildSource is the build source of a module whose every artifact names the paths it is built from (ADR 0499
+// §1): its manifest and each path, relative to its repository's root, a path read as a file or everything below a
+// directory of that name (`<path>/**` holds both). Nil when an artifact names none: the module reads its directory.
+func pathsBuildSource(m catalogue.Manifest, dir string) []string {
+	if m.Build == nil || len(m.Build.Artifacts) == 0 {
+		return nil
+	}
+	in := func(p string) string {
+		if dir == "" {
+			return p
+		}
+		return dir + "/" + p
+	}
+	seen := map[string]bool{}
+	out := []string{in("module.json")}
+	for _, a := range m.Build.Artifacts {
+		if len(a.Paths) == 0 {
+			return nil
+		}
+		for _, p := range a.Paths {
+			entry := in(strings.Trim(path.Clean(p), "/")) + "/**"
+			if !seen[entry] {
+				seen[entry] = true
+				out = append(out, entry)
+			}
+		}
+	}
+	return out
+}
+
+// handKey is the key a registration at references is made from: the builder's key when it has one (its other artifacts
+// stand), with each reference given in place of or beside the key's artifact of that name, and counted done.
+func handKey(t keyTake, k builderkeys.Key) builderkeys.Key {
+	if !k.Found {
+		k = builderkeys.Key{Module: t.Module, Fingerprint: t.Trunk.FP2, Found: true}
+	}
+	build := k.Build
+	build.State, build.By, build.Error = sdkdelivery.BuildDone, "hand", ""
+	if build.Manifest == "" {
+		build.Manifest = t.Trunk.Manifest
+	}
+	build.Artifacts = nil
+	for _, a := range k.Build.Artifacts {
+		if _, replaced := t.Hand[a.Name]; !replaced {
+			build.Artifacts = append(build.Artifacts, a)
+		}
+	}
+	names := make([]string, 0, len(t.Hand))
+	for name := range t.Hand {
+		names = append(names, name)
+	}
+	sort.Strings(names)
+	for _, name := range names {
+		reference := t.Hand[name]
+		build.Artifacts = append(build.Artifacts, sdkdelivery.BuiltArtifact{Name: name,
+			Digest: handDigestOf.FindString(reference), Reference: reference})
+	}
+	k.Build = build
+	return k
+}
+
+// handCoversEvery refuses a registration at references that names an artifact the manifest does not declare, or leaves
+// one it declares without a reference (the key's or a given one).
+func handCoversEvery(m catalogue.Manifest, k builderkeys.Key, hand map[string]string) error {
+	declared := map[string]bool{}
+	if m.Build != nil {
+		for _, a := range m.Build.Artifacts {
+			declared[a.Name] = true
+		}
+	}
+	for name := range hand {
+		if !declared[name] {
+			return fmt.Errorf("--reference %s: %s declares no artifact of that name. Nothing was registered", name, m.Module)
+		}
+	}
+	have := map[string]bool{}
+	for _, a := range k.Build.Artifacts {
+		have[a.Name] = true
+	}
+	var missing []string
+	for name := range declared {
+		if !have[name] {
+			missing = append(missing, name)
+		}
+	}
+	sort.Strings(missing)
+	if len(missing) > 0 {
+		return fmt.Errorf("%s declares the artifact(s) %s and no --reference names them, nor does a key of the builder. "+
+			"Nothing was registered", m.Module, strings.Join(missing, ", "))
+	}
+	return nil
+}

cmd/mesh-controller/key_takein_integration_test.go

@@ -0,0 +1,271 @@
+//go:build integration
+
+package main
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"reflect"
+	"strings"
+	"testing"
+
+	"git.novox.be/novox/mesh-sdk/go/catalogue"
+	sdkdelivery "git.novox.be/novox/mesh-sdk/go/delivery"
+	"github.com/novox/mesh-controller/internal/builderkeys"
+	"github.com/novox/mesh-controller/internal/inventory"
+)
+
+// withTrunkList stands in for the catalogue's trunk head: an empty list of predefined keys, readable, or not.
+func withTrunkList(t *testing.T, readable bool) {
+	t.Helper()
+	was := predefinedAtTrunk
+	predefinedAtTrunk = func(context.Context, *inventory.Inventory) (predefinedHead, error) {
+		if !readable {
+			return predefinedHead{}, errors.New("the forge did not answer")
+		}
+		list, err := catalogue.ParsePredefined([]byte(`{}`))
+		return predefinedHead{List: list, Repository: "novox/mesh-catalog", Commit: "abcdef0123456789",
+			Generation: 1 << 40}, err
+	}
+	t.Cleanup(func() { predefinedAtTrunk = was })
+}
+
+// aKeyFor is a done key of module at fp, of one archive with a reference, and the indexer's trunk value naming it at
+// commit in repository/path.
+func aKeyFor(module, version, fp, repository, path, commit string) (keyBuckets, sdkdelivery.Module) {
+	raw := `{"module":"` + module + `","version":"` + version + `","build":{"artifacts":[{"name":"a","kind":"archive","from":"files"}]},` +
+		`"resources":[{"id":"a","type":"archive","path":"/opt/` + module + `","artifact":"a"}]}`
+	digest := sdkdelivery.ManifestDigest([]byte(raw))
+	blob := shaOf(module + version)
+	k := builderkeys.Key{Module: module, Fingerprint: fp, Found: true, Revision: 1,
+		Build: sdkdelivery.BuilderBuild{State: sdkdelivery.BuildDone, By: "ace", Manifest: digest,
+			Artifacts: []sdkdelivery.BuiltArtifact{{Name: "a", Kind: "archive", Digest: blob,
+				Reference: "artifact-store://" + module + "/a/blobs/" + blob}}}}
+	return keyBuckets{keys: map[string]builderkeys.Key{module: k}, manifests: map[string]string{digest: raw}},
+		sdkdelivery.Module{FP2: fp, Manifest: digest, Repository: repository, Commit: commit, Path: path}
+}
+
+func fpOf(c byte) string { return "src2:" + strings.Repeat(string(c), 64) }
+
+// A3, A4 (ADR 0498 §8, ADR 0501 §1-§3, §8): a done key of a trunk fingerprint records one build of today's layout,
+// whose artifacts are the key's, and registers the module under the same rules of who may register as before.
+func TestADoneKeyOfTheTrunkRegistersUnderTheSameRules(t *testing.T) {
+	open := theCatalogue(t) // sudo from novox/mesh-catalog modules/sudo, mesh-host from novox/mesh-host
+	ctx := t.Context()
+	inv := open.inventory
+	withTrunkList(t, true)
+
+	// A known module from the repository and path the catalogue builds it from: registered from its key.
+	keys, trunk := aKeyFor("sudo", "2", fpOf('a'), "novox/mesh-catalog", "modules/sudo", "c0ffee0123456789")
+	_, kept, err := takeInKey(ctx, inv, keys, keyTake{Module: "sudo", Trunk: trunk, Ask: registrationAsk{Merge: trunk.Commit}})
+	if err != nil {
+		t.Fatalf("0501 §1: a done key of sudo's trunk fingerprint was not taken in: %v", err)
+	}
+	if shelf, _ := inv.Catalogue(ctx); shelf["sudo"].Version != "2" {
+		t.Fatalf("0501 §1: sudo is %q", shelf["sudo"].Version)
+	}
+	got, found, err := inv.BuildByID(ctx, kept.ID)
+	if err != nil || !found || len(got.Made) != 1 || got.Made[0].Reference != kept.Made[0].Reference {
+		t.Fatalf("0498 §8: the recorded build is %+v (%v)", got, err)
+	}
+	if fps, err := inv.BuildSourceFingerprints(ctx, "sudo"); err != nil || fps["c0ffee0123456789"] != fpOf('a') {
+		t.Fatalf("0498 §8: the recorded build's fingerprint is %v (%v), not the key's", fps, err)
+	}
+	// Recording the same key again is one record.
+	if _, _, err := takeInKey(ctx, inv, keys, keyTake{Module: "sudo", Trunk: trunk, Ask: registrationAsk{Merge: trunk.Commit}}); err != nil {
+		t.Fatal(err)
+	}
+	builds, _ := inv.Builds(ctx, "sudo", 20)
+	n := 0
+	for _, b := range builds {
+		if b.ID == kept.ID {
+			n++
+		}
+	}
+	if n != 1 {
+		t.Fatalf("0498 §8: one key taken in twice is %d records", n)
+	}
+
+	// A known module from another repository: refused, as a build of it was (ADR 0266).
+	other, otherTrunk := aKeyFor("sudo", "evil", fpOf('b'), "agent/sudo", "modules/sudo", "d00d0123456789ab")
+	if _, _, err := takeInKey(ctx, inv, other, keyTake{Module: "sudo", Trunk: otherTrunk,
+		Ask: registrationAsk{Merge: otherTrunk.Commit}}); !errors.Is(err, errNotItsSource) {
+		t.Fatalf("0501 §3: a known module from another repository was taken in: %v", err)
+	}
+	// A new module from a repository the catalogue builds from: registered.
+	zram, zramTrunk := aKeyFor("zram", "1", fpOf('c'), "novox/mesh-catalog", "modules/zram", "c0ffee0123456789")
+	if _, _, err := takeInKey(ctx, inv, zram, keyTake{Module: "zram", Trunk: zramTrunk, Ask: registrationAsk{Merge: zramTrunk.Commit}}); err != nil {
+		t.Fatalf("0501 §3: a new module from a built repository was refused: %v", err)
+	}
+	// A new module from a repository nothing is built from, with no Approve: refused.
+	tools, toolsTrunk := aKeyFor("agent-tools", "1", fpOf('d'), "agent/tools", "", "e0e0e0e0e0e0e0e0")
+	if _, _, err := takeInKey(ctx, inv, tools, keyTake{Module: "agent-tools", Trunk: toolsTrunk,
+		Ask: registrationAsk{Merge: toolsTrunk.Commit}}); !errors.Is(err, errNotItsSource) {
+		t.Fatalf("0501 §3: a new repository's module was taken in with no warrant: %v", err)
+	}
+	// At the terminal the operator registers it (ADR 0501 §4).
+	if _, _, err := takeInKey(ctx, inv, tools, keyTake{Module: "agent-tools", Trunk: toolsTrunk,
+		Ask: registrationAsk{Terminal: true}}); err != nil {
+		t.Fatalf("0501 §4: the terminal's registration was refused: %v", err)
+	}
+}
+
+// ADR 0501 §2: a key only a candidate names registers nothing: the trunk value names another fingerprint, whose key is
+// not there, and the take-in waits.
+func TestAKeyOnlyACandidateNamesRegistersNothing(t *testing.T) {
+	open := theCatalogue(t)
+	ctx := t.Context()
+	withTrunkList(t, true)
+	keys, trunk := aKeyFor("sudo", "3", fpOf('e'), "novox/mesh-catalog", "modules/sudo", "c0ffee0123456789")
+	trunk.FP2 = fpOf('f') // the trunk names another fingerprint than the candidate's done key
+	_, _, err := takeInKey(ctx, open.inventory, keys, keyTake{Module: "sudo", Trunk: trunk, Ask: registrationAsk{Merge: trunk.Commit}})
+	if !errors.Is(err, errKeyWaits) {
+		t.Fatalf("0501 §2: %v", err)
+	}
+	if shelf, _ := open.inventory.Catalogue(ctx); shelf["sudo"].Version != "1" {
+		t.Fatalf("0501 §2: a candidate's key registered sudo %q", shelf["sudo"].Version)
+	}
+}
+
+// ADR 0501 §8: a take-in that cannot read the list of predefined keys at the catalogue's trunk head waits, says so and
+// registers nothing.
+func TestATakeInWithoutTheTrunksListWaits(t *testing.T) {
+	open := theCatalogue(t)
+	ctx := t.Context()
+	withTrunkList(t, false)
+	keys, trunk := aKeyFor("sudo", "4", fpOf('1'), "novox/mesh-catalog", "modules/sudo", "c0ffee0123456789")
+	_, _, err := takeInKey(ctx, open.inventory, keys, keyTake{Module: "sudo", Trunk: trunk, Ask: registrationAsk{Merge: trunk.Commit}})
+	if !errors.Is(err, errKeyWaits) || !strings.Contains(err.Error(), "predefined keys") {
+		t.Fatalf("0501 §8: %v", err)
+	}
+	if shelf, _ := open.inventory.Catalogue(ctx); shelf["sudo"].Version != "1" {
+		t.Fatalf("0501 §8: registered %q", shelf["sudo"].Version)
+	}
+}
+
+// A3 (the lead's decision on Against and Read): a key's record keeps the collector's keep set as it was and its read
+// repositories are its manifest's, fresh at every key.
+func TestAKeysRecordKeepsTheKeepSetAndReadsItsManifest(t *testing.T) {
+	open := theCatalogue(t)
+	ctx := t.Context()
+	inv := open.inventory
+	withTrunkList(t, true)
+	before, err := inv.KeepSet(ctx)
+	if err != nil {
+		t.Fatal(err)
+	}
+	raw := `{"module":"sudo","version":"5","build":{"artifacts":[{"name":"img","kind":"image","from":"Dockerfile",` +
+		`"context":{"repository":"novox/elsewhere","seat":"git"}}]},"resources":[{"id":"run","type":"container","artifact":"img"}]}`
+	digest := sdkdelivery.ManifestDigest([]byte(raw))
+	k := builderkeys.Key{Module: "sudo", Fingerprint: fpOf('2'), Found: true, Revision: 1,
+		Build: sdkdelivery.BuilderBuild{State: sdkdelivery.BuildDone, By: "g14", Manifest: digest,
+			Artifacts: []sdkdelivery.BuiltArtifact{{Name: "img", Kind: "image", Digest: shaOf("img5"),
+				Reference: "artifact-store://sudo/img@" + shaOf("img5")}}}}
+	keys := keyBuckets{keys: map[string]builderkeys.Key{"sudo": k}, manifests: map[string]string{digest: raw}}
+	trunk := sdkdelivery.Module{FP2: fpOf('2'), Manifest: digest, Repository: "novox/mesh-catalog",
+		Commit: "c0ffee0123456789", Path: "modules/sudo"}
+	if _, _, err := takeInKey(ctx, inv, keys, keyTake{Module: "sudo", Trunk: trunk, Ask: registrationAsk{Merge: trunk.Commit}}); err != nil {
+		t.Fatal(err)
+	}
+	after, err := inv.KeepSet(ctx)
+	if err != nil {
+		t.Fatal(err)
+	}
+	for reference, why := range before {
+		if !reflect.DeepEqual(after[reference], why) && !strings.Contains(strings.Join(after[reference], ","), strings.Join(why, ",")) {
+			t.Errorf("the keep set changed for %s: %v, was %v", reference, after[reference], why)
+		}
+	}
+	read, err := inv.ReadRepositories(ctx)
+	if err != nil {
+		t.Fatal(err)
+	}
+	found := false
+	for _, r := range read["sudo"] {
+		if !r.Own && r.Repository == "novox/elsewhere" {
+			found = true
+		}
+	}
+	if !found {
+		text, _ := json.Marshal(read["sudo"])
+		t.Fatalf("the key's record does not read its manifest's context: %s", text)
+	}
+}
+
+// A9 (ADR 0453 §6, ADR 0499 consequences): at the switch, a key's build whose every artifact has the digest of the
+// build-agent build the mesh holds (`src1:`) is no move: it is registered with that build's artifacts, and a walk sends
+// nothing for it.
+func TestAKeyWithTheHeldBuildsDigestsIsNoMove(t *testing.T) {
+	open := theCatalogue(t)
+	ctx := t.Context()
+	inv := open.inventory
+	withTrunkList(t, true)
+	keys, trunk := aKeyFor("sudo", "6", fpOf('6'), "novox/mesh-catalog", "modules/sudo", "c0ffee0123456789")
+	k := keys.keys["sudo"]
+	held := inventory.Build{ID: "build-sudo-old", Module: "sudo", Repository: "novox/mesh-catalog", Path: "modules/sudo",
+		Commit: "0ld0ld0ld0ld0ld0", SourceFingerprint: "src1:" + strings.Repeat("9", 64),
+		Made: []inventory.Artifact{{Name: "a", Kind: "archive", Reference: k.Build.Artifacts[0].Reference}}}
+	held.Manifest, _ = json.Marshal(catalogue.Manifest{Module: "sudo", Version: "held"})
+	if err := inv.RecordBuild(ctx, held); err != nil {
+		t.Fatal(err)
+	}
+	_, kept, err := takeInKey(ctx, inv, keys, keyTake{Module: "sudo", Trunk: trunk, Ask: registrationAsk{Merge: trunk.Commit}})
+	if err != nil {
+		t.Fatal(err)
+	}
+	same, err := inv.SameSourceCommits(ctx, "sudo", kept.ID)
+	if err != nil || !same["0ld0ld0ld0ld0ld0"] {
+		t.Fatalf("A9: the key's build does not stand on the held build of the same digests: %v %v", same, err)
+	}
+	if shelf, _ := inv.Catalogue(ctx); shelf["sudo"].Version != "held" {
+		t.Fatalf("A9: sudo is registered as %q, not with the held build's artifacts", shelf["sudo"].Version)
+	}
+}
+
+// A13 against the store: the switch's list reads the build the mesh holds of each module and the builder's key of its
+// trunk fingerprint, and names each module unmoved, moved or not known.
+func TestTheSwitchsListReadsTheHeldBuildsAndTheKeys(t *testing.T) {
+	open := theCatalogue(t)
+	ctx := t.Context()
+	inv := open.inventory
+	keys, trunk := aKeyFor("sudo", "1", fpOf('b'), "novox/mesh-catalog", "modules/sudo", "c0ffee0123456789")
+	k := keys.keys["sudo"]
+	if err := inv.RecordBuild(ctx, inventory.Build{ID: "build-sudo-held", Module: "sudo", Repository: "novox/mesh-catalog",
+		Commit: "c0ffee0123456789", Made: []inventory.Artifact{{Name: "a", Kind: "archive",
+			Reference: k.Build.Artifacts[0].Reference}}}); err != nil {
+		t.Fatal(err)
+	}
+	reads := planKeysOf{values: map[string]sdkdelivery.Module{"sudo@": trunk}, keys: map[string]builderkeys.Key{"sudo": k}}
+	lines, err := switchList(ctx, inv, reads)
+	if err != nil {
+		t.Fatal(err)
+	}
+	got := map[string]string{}
+	for _, l := range lines {
+		got[l.Module] = l.Verdict
+	}
+	if got["sudo"] != switchUnmoved || got["mesh-host"] != switchUnknown {
+		t.Fatalf("A13: the switch's list is %+v", lines)
+	}
+}
+
+// Issue 1902: the take-in with the lookup of the catalogue's repository NOT stubbed - the catalogue's modules are registered
+// with a URL source and no seat, as every live row is - reads the list from the forge's wire alone and registers the module.
+func TestATakeInFindsTheCataloguesRepositoryInTheURLForm(t *testing.T) {
+	open := theCatalogue(t)
+	ctx := t.Context()
+	was, wasForms := formsOfSources, askGitea
+	formsOfSources = func(context.Context, *inventory.Inventory) *sourceForms { return aFormsOnTheForge() }
+	t.Cleanup(func() { formsOfSources, askGitea = was, wasForms })
+	aForgeAnsweringTheCatalogue(t)
+	if err := open.inventory.RegisterModule(ctx, catalogue.Manifest{Module: "catalogue-anchor", Version: "1"},
+		inventory.Source{Repository: "http://anchor.internal:20000/novox/mesh-catalog.git", Path: "modules/catalogue-anchor",
+			Ref: "main", BuiltFrom: "c0", Head: "c0"}); err != nil {
+		t.Fatal(err)
+	}
+	keys, trunk := aKeyFor("sudo", "6", fpOf('7'), "novox/mesh-catalog", "modules/sudo", "c0ffee0123456789")
+	if _, _, err := takeInKey(ctx, open.inventory, keys, keyTake{Module: "sudo", Trunk: trunk, Ask: registrationAsk{Merge: trunk.Commit}}); err != nil {
+		t.Fatalf("a key was not taken in with the real lookup of the catalogue's repository: %v", err)
+	}
+}

cmd/mesh-controller/key_takein_test.go

@@ -0,0 +1,231 @@
+package main
+
+import (
+	"archive/tar"
+	"bytes"
+	"compress/gzip"
+	"context"
+	"crypto/sha256"
+	"encoding/hex"
+	"encoding/json"
+	"errors"
+	"strings"
+	"testing"
+
+	"git.novox.be/novox/mesh-sdk/go/catalogue"
+	sdkdelivery "git.novox.be/novox/mesh-sdk/go/delivery"
+	"github.com/novox/mesh-controller/internal/builderkeys"
+	"github.com/novox/mesh-controller/internal/inventory"
+)
+
+// keyBuckets is the builder's and the indexer's buckets as a take-in reads them, for a test: keys by module, manifests by
+// digest.
+type keyBuckets struct {
+	keys      map[string]builderkeys.Key
+	manifests map[string]string
+}
+
+func (k keyBuckets) Build(_ context.Context, module, fp string) (builderkeys.Key, error) {
+	if key, ok := k.keys[module]; ok && key.Fingerprint == fp {
+		return key, nil
+	}
+	return builderkeys.Key{Module: module, Fingerprint: fp}, nil
+}
+
+func (k keyBuckets) Manifest(_ context.Context, digest string) (sdkdelivery.Manifest, error) {
+	raw, ok := k.manifests[digest]
+	if !ok {
+		return sdkdelivery.Manifest{}, errors.New("the indexer holds no manifest " + digest)
+	}
+	return sdkdelivery.Manifest{Module: "x", JSON: raw}, nil
+}
+
+const keyFP = "src2:" + "1111111111111111111111111111111111111111111111111111111111111111"
+
+// aKeyOf is a done key of module x at keyFP for the manifest raw, with these artifacts.
+func aKeyOf(raw string, revision uint64, made ...sdkdelivery.BuiltArtifact) (keyBuckets, sdkdelivery.Module) {
+	digest := sdkdelivery.ManifestDigest([]byte(raw))
+	k := builderkeys.Key{Module: "x", Fingerprint: keyFP, Found: true, Revision: revision,
+		Build: sdkdelivery.BuilderBuild{State: sdkdelivery.BuildDone, By: "ace", Manifest: digest, Artifacts: made}}
+	trunk := sdkdelivery.Module{FP2: keyFP, Manifest: digest, Repository: "novox/mesh-catalog", Commit: "c0ffee0123456789",
+		Path: "modules/x"}
+	return keyBuckets{keys: map[string]builderkeys.Key{"x": k}, manifests: map[string]string{digest: raw}}, trunk
+}
+
+const tsBundle = `{"module":"x","version":"1","tools":["x_read"],
+  "build":{"artifacts":[{"name":"tools","kind":"bundle","language":"typescript","entrypoints":["dist/index.js"]},
+    {"name":"img","kind":"image","from":"Dockerfile","context":{"repository":"novox/other","seat":"git"}}]},
+  "resources":[{"id":"run","type":"container","artifact":"img"}]}`
+
+func shaOf(b string) string {
+	sum := sha256.Sum256([]byte(b))
+	return "sha256:" + hex.EncodeToString(sum[:])
+}
+
+// A3 (ADR 0498 §8, ADR 0501 §1): a done key whose every artifact names a reference is one recorded build, its artifacts
+// the key's, its launchers by the build modules' rule, its reads from its manifest, the bases its last build stood on
+// carried; recorded twice it is one record.
+func TestADoneKeyIsOneRecordedBuildOfItsArtifacts(t *testing.T) {
+	keys, trunk := aKeyOf(tsBundle, 3,
+		sdkdelivery.BuiltArtifact{Name: "tools", Kind: "bundle", Digest: shaOf("t"),
+			Reference: "artifact-store://x/tools/blobs/" + shaOf("t")},
+		sdkdelivery.BuiltArtifact{Name: "img", Kind: "image", Digest: shaOf("i"),
+			Reference: "artifact-store://x/img@" + shaOf("i")})
+	previous := []inventory.Build{{ID: "build-1", Module: "x", Against: []string{"artifact-store://base@sha256:aa"}}}
+	take := keyTake{Module: "x", Trunk: trunk}
+	kept, resolved, err := buildOfKey(t.Context(), keys, take, keyContext{previous: previous})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if kept.ID != "key-1111111111111111111111111111111111111111111111111111111111111111-3" {
+		t.Errorf("the record's id is %s", kept.ID)
+	}
+	again, _, _ := buildOfKey(t.Context(), keys, take, keyContext{previous: previous})
+	if again.ID != kept.ID {
+		t.Errorf("one key recorded twice is two records: %s and %s", kept.ID, again.ID)
+	}
+	if kept.SourceFingerprint != keyFP || kept.Commit != trunk.Commit || kept.Path != "modules/x" || kept.On != "ace" ||
+		kept.Module != "x" || kept.Repository != "novox/mesh-catalog" {
+		t.Errorf("the record: %+v", kept)
+	}
+	if len(kept.Made) != 2 || kept.Made[0].Reference != "artifact-store://x/tools/blobs/"+shaOf("t") ||
+		kept.Made[1].Reference != "artifact-store://x/img@"+shaOf("i") || kept.Made[1].Kind != "image" {
+		t.Errorf("Made is not the key's artifacts: %+v", kept.Made)
+	}
+	if len(kept.Read) != 1 || kept.Read[0].Repository != "novox/other" {
+		t.Errorf("Read is not the manifest's contexts: %+v", kept.Read)
+	}
+	if kept.Sources != nil || kept.Mirrored != nil {
+		t.Errorf("a key's record says build sources or mirrored bases it cannot know: %+v %+v", kept.Sources, kept.Mirrored)
+	}
+	if len(kept.Against) != 1 || kept.Against[0] != "artifact-store://base@sha256:aa" {
+		t.Errorf("the bases the last build stood on are not carried: %v", kept.Against)
+	}
+	if len(resolved.Bundles) != 1 || resolved.Bundles[0].Launchers["dist/index.js"] != "dist/index.serve.mjs" {
+		t.Errorf("the bundle's launchers: %+v", resolved.Bundles)
+	}
+	var m map[string]any
+	if err := json.Unmarshal(kept.Manifest, &m); err != nil || !strings.Contains(string(kept.Manifest), shaOf("i")) {
+		t.Errorf("the recorded manifest names no image digest: %s", kept.Manifest)
+	}
+}
+
+// A3 (ADR 0498 §8): a key with an artifact naming no reference, a key not done and a missing key are waited for, said;
+// a failed key fails in the builder's words; a module with no fingerprint of the new form waits, naming why.
+func TestAKeyNotReadyWaitsAndAFailedKeyFails(t *testing.T) {
+	noRef, trunk := aKeyOf(tsBundle, 1,
+		sdkdelivery.BuiltArtifact{Name: "tools", Kind: "bundle", Digest: shaOf("t"),
+			Reference: "artifact-store://x/tools/blobs/" + shaOf("t")},
+		sdkdelivery.BuiltArtifact{Name: "img", Kind: "image", Digest: shaOf("i")})
+	take := keyTake{Module: "x", Trunk: trunk}
+	_, _, err := buildOfKey(t.Context(), noRef, take, keyContext{})
+	if !errors.Is(err, errKeyWaits) || !strings.Contains(err.Error(), "waits for the reference of img") {
+		t.Errorf("a key without a reference: %v", err)
+	}
+	building := noRef
+	k := building.keys["x"]
+	k.Build = sdkdelivery.BuilderBuild{State: sdkdelivery.BuildBuilding, By: "g14"}
+	building.keys = map[string]builderkeys.Key{"x": k}
+	if _, _, err := buildOfKey(t.Context(), building, take, keyContext{}); !errors.Is(err, errKeyWaits) ||
+		!strings.Contains(err.Error(), "building on g14") {
+		t.Errorf("a building key: %v", err)
+	}
+	if _, _, err := buildOfKey(t.Context(), keyBuckets{}, take, keyContext{}); !errors.Is(err, errKeyWaits) ||
+		!strings.Contains(err.Error(), "no build of x") {
+		t.Errorf("no key: %v", err)
+	}
+	k.Build = sdkdelivery.BuilderBuild{State: sdkdelivery.BuildFailed, Error: "digests differ: ace sha256:1, g14 sha256:2"}
+	failed := keyBuckets{keys: map[string]builderkeys.Key{"x": k}}
+	if _, _, err := buildOfKey(t.Context(), failed, take, keyContext{}); !errors.Is(err, errKeyFailed) ||
+		!strings.Contains(err.Error(), "digests differ: ace sha256:1, g14 sha256:2") {
+		t.Errorf("a failed key: %v", err)
+	}
+	none := take
+	none.Trunk.FP2, none.Trunk.None2 = "", "no lock"
+	if _, _, err := buildOfKey(t.Context(), noRef, none, keyContext{}); !errors.Is(err, errKeyWaits) ||
+		!strings.Contains(err.Error(), "no lock") {
+		t.Errorf("no fingerprint: %v", err)
+	}
+}
+
+// ADR 0501 §7: a manifest word this controller does not read waits for the controller that reads it; never fails.
+func TestAManifestWordTheControllerDoesNotReadWaits(t *testing.T) {
+	raw := `{"module":"x","version":"1","not-a-word-yet":true,"build":{"artifacts":[{"name":"a","kind":"archive","from":"files"}]},
+  "resources":[{"id":"a","type":"archive","path":"/opt/x","artifact":"a"}]}`
+	keys, trunk := aKeyOf(raw, 1, sdkdelivery.BuiltArtifact{Name: "a", Kind: "archive", Digest: shaOf("a"),
+		Reference: "artifact-store://x/a/blobs/" + shaOf("a")})
+	_, _, err := buildOfKey(t.Context(), keys, keyTake{Module: "x", Trunk: trunk}, keyContext{})
+	if !errors.Is(err, errKeyWaits) || !strings.Contains(err.Error(), `"not-a-word-yet"`) {
+		t.Fatalf("an unread word: %v", err)
+	}
+}
+
+func packed(t *testing.T, files map[string]string) []byte {
+	t.Helper()
+	var buf bytes.Buffer
+	z := gzip.NewWriter(&buf)
+	w := tar.NewWriter(z)
+	for name, text := range files {
+		if err := w.WriteHeader(&tar.Header{Name: name, Mode: 0o644, Size: int64(len(text)), Typeflag: tar.TypeReg}); err != nil {
+			t.Fatal(err)
+		}
+		if _, err := w.Write([]byte(text)); err != nil {
+			t.Fatal(err)
+		}
+	}
+	if err := w.Close(); err != nil {
+		t.Fatal(err)
+	}
+	if err := z.Close(); err != nil {
+		t.Fatal(err)
+	}
+	return buf.Bytes()
+}
+
+// A templated module's texts are read back from the archive the store holds under the key's reference; an archive the
+// store does not answer is waited for (the lead's Q1b).
+func TestATemplatedModulesTextsAreReadFromItsArchive(t *testing.T) {
+	raw := `{"module":"x","version":"1","templates":"templates",
+  "build":{"artifacts":[{"name":"templates","kind":"archive","from":"templates"}]},
+  "resources":[{"id":"main","type":"file","path":"/etc/x.conf","mode":"0644","template":"templates/x.conf"}]}`
+	body := packed(t, map[string]string{"x.conf": "listen 1\n"})
+	sum := sha256.Sum256(body)
+	digest := "sha256:" + hex.EncodeToString(sum[:])
+	keys, trunk := aKeyOf(raw, 1, sdkdelivery.BuiltArtifact{Name: "templates", Kind: "archive", Digest: digest,
+		Reference: "artifact-store://x/templates/blobs/" + digest})
+	asked := ""
+	archive := func(_ context.Context, reference string) ([]byte, error) { asked = reference; return body, nil }
+	_, resolved, err := buildOfKey(t.Context(), keys, keyTake{Module: "x", Trunk: trunk}, keyContext{archive: archive})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if asked != "artifact-store://x/templates/blobs/"+digest {
+		t.Errorf("the archive asked: %q", asked)
+	}
+	if text, _ := json.Marshal(resolved.Resources); !strings.Contains(string(text), "listen 1") {
+		t.Errorf("the template's text is not in the file: %s", text)
+	}
+	gone := func(context.Context, string) ([]byte, error) { return nil, errors.New("the store does not hold it") }
+	if _, _, err := buildOfKey(t.Context(), keys, keyTake{Module: "x", Trunk: trunk}, keyContext{archive: gone}); !errors.Is(err, errKeyWaits) ||
+		!strings.Contains(err.Error(), "cannot be read from the artifact store") {
+		t.Errorf("an archive the store does not answer: %v", err)
+	}
+}
+
+// The launchers a key's bundle is resolved with are mesh-sdk's one rule (buildstep.Launchers), the names
+// mesh-build-node writes: a TypeScript bundle's entrypoint x.js runs as x.serve.mjs, a Go bundle has none.
+func TestALaunchersRuleIsTheBuildModules(t *testing.T) {
+	m, err := catalogue.ParseManifest([]byte(tsBundle))
+	if err != nil {
+		t.Fatal(err)
+	}
+	k := builderkeys.Key{Build: sdkdelivery.BuilderBuild{Artifacts: []sdkdelivery.BuiltArtifact{{Name: "tools", Digest: "sha256:1",
+		Reference: "artifact-store://x/tools/blobs/sha256:1"}}}}
+	built, err := builtOfKey(t.Context(), nil, m, k)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if built[0].Launchers["dist/index.js"] != "dist/index.serve.mjs" || built[0].Kind != "bundle" {
+		t.Fatalf("built: %+v", built[0])
+	}
+}

cmd/mesh-controller/legacy_takein_integration_test.go

@@ -0,0 +1,317 @@
+//go:build integration
+
+package main
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"path"
+	"slices"
+	"strings"
+	"time"
+
+	"git.novox.be/novox/mesh-sdk/go/catalogue"
+	"github.com/novox/mesh-controller/internal/inventory"
+	"github.com/novox/mesh-controller/internal/link"
+)
+
+// What the tests below take a build in with (R4g): the controller itself registers a module only from the builder's done
+// key now (takeInKey), but a great many of these tests only need a module registered with a build recorded, in the form
+// the old outcome carried, so that is kept here and nowhere else. It is the controller's take-in of a build-agent outcome
+// as it was, less the checks only an outcome needed. Nothing in the controller calls any of it.
+
+// buildFrom turns what a builder said into what the mesh keeps.
+//
+// **By digest and path, never by where it was pushed** (novox/hq 04-ISSUES/102). The builder
+// says `<registry>:<port>/<module>/<artifact>@sha256:…`; the mesh records the artifact-store
+// reference and composes the store's address back in where a reference is used. `against` — what
+// the build stood on, the catalogue's edge — is recorded the same way, so an edge names a module's
+// artifact and not the machine it was pulled from.
+func buildFrom(result link.BuildResult) inventory.Build {
+	kept := inventory.Build{
+		ID: result.ID, Repository: result.Repository, Ref: result.Ref,
+		Commit: result.Commit, On: result.On, Failed: result.Failed,
+		// **What the announcement carries, kept rather than discarded** (novox/hq 04-ISSUES/050).
+		// The catalogue turns the manifest into requires/provides edges and `against` into build
+		// edges, and it is not always listening when a build happens — on a fresh mesh it cannot
+		// be, for exactly the modules it needs most. Keeping them is what makes a replay able to
+		// rebuild the graph rather than a list of names.
+		Path: result.Path,
+		// What it was made from (novox/hq issue 280): two builds with one are one build.
+		SourceFingerprint: result.SourceFingerprint,
+		SourceInputs:      result.SourceInputs,
+	}
+	// When it was asked, which is what orders it against another build of the same module
+	// (novox/hq 04-ISSUES/219) — not when it was heard.
+	if asked, ok := link.BuildAskedAt(result.ID); ok {
+		kept.Asked = asked
+	}
+	for _, ref := range result.Against {
+		kept.Against = append(kept.Against, catalogue.Recorded(ref))
+	}
+	for _, ref := range result.Mirrored {
+		kept.Mirrored = append(kept.Mirrored, catalogue.Recorded(ref))
+	}
+	for _, r := range result.Read {
+		kept.Read = append(kept.Read, inventory.ReadRepository{Repository: r.Repository, Ref: r.Ref})
+	}
+	// What it was made from, as files (novox/hq ADR 0267): the planner maps the next merge onto it.
+	for _, s := range result.Sources {
+		kept.Sources = append(kept.Sources, inventory.BuildSource{Repository: s.Repository, Ref: s.Ref, Paths: s.Paths})
+	}
+	var announced []inventory.Artifact
+	for _, made := range result.Made {
+		announced = append(announced, inventory.Artifact{
+			Name: made.Name, Kind: made.Kind, Reference: made.Reference,
+		})
+		kept.Made = append(kept.Made, inventory.Artifact{
+			Name: made.Name, Kind: made.Kind, Reference: catalogue.Recorded(made.Reference),
+		})
+	}
+	kept.Manifest = recordedManifest(result.Manifest, announced)
+	// The module name comes from the manifest, which only exists when the build got that far.
+	if len(kept.Manifest) > 0 {
+		if list, err := judgedWith(result); err == nil {
+			if m, err := catalogue.ParseManifestWith(kept.Manifest, list); err == nil {
+				kept.Module = m.Module
+			}
+		}
+	}
+	return kept
+}
+
+// recordedManifest is a build's manifest with the store's address taken off every reference the
+// build itself made. Other references — an image a module runs from a public registry — are what
+// they were, which is why this rewrites only what `made` names rather than everything that looks
+// like an address.
+func recordedManifest(raw json.RawMessage, made []inventory.Artifact) json.RawMessage {
+	announced := map[string]bool{}
+	for _, a := range made {
+		announced[a.Reference] = true
+	}
+	return withReferences(raw, func(ref string) (string, bool) {
+		if !announced[ref] {
+			return ref, false
+		}
+		return catalogue.Recorded(ref), true
+	})
+}
+
+// takeIn is what the mesh does with a build's outcome, whoever hears it: the waiting command and
+// the daemon that follows the role's events both come here (novox/hq issue 176), so a build's
+// result reaches the catalogue whether or not the asker was still listening.
+//
+// Kept before it is judged. A failed build that leaves no trace is indistinguishable from one
+// nobody asked for, and the difference is the whole of whether somebody should be looking at
+// something. Then parsed with the same parser a hand-written manifest goes through — a second path
+// would be a second thing to disagree about what a manifest is — and registered with where it came
+// from: **for a source on a seat, as the path and the seat, never the URL just cloned** (ADR 0111),
+// which the request carried and the outcome echoes. A definition naming an installation is refused
+// here, where it would enter the catalogue; the build stays recorded and the refusal says which.
+//
+// Idempotent: the same outcome taken in twice registers the same module twice, which is one row
+// written with the same values.
+func takeIn(ctx context.Context, inv *inventory.Inventory, result link.BuildResult) (
+	catalogue.Manifest, inventory.Build, error) {
+	// The list of predefined keys as the store keeps it now: another controller process may have kept a newer one.
+	if err := loadPredefined(ctx, inv); err != nil {
+		return catalogue.Manifest{}, inventory.Build{}, fmt.Errorf("the list of predefined keys kept cannot be "+
+			"read: %w", err)
+	}
+	kept := buildFrom(result)
+	if err := inv.RecordBuild(ctx, kept); err != nil {
+		return catalogue.Manifest{}, kept, err
+	}
+	if result.Failed != "" {
+		// The builder's own words. Wrapping them in something about the control plane would put
+		// two explanations between a person and a build log.
+		return catalogue.Manifest{}, kept, fmt.Errorf("%s could not build %s:\n%s",
+			result.On, result.Repository, result.Failed)
+	}
+	// Judged first against the list the build was judged against: the catalogue's at the commit built (novox/hq
+	// ADR 0348 §7), so a module naming a key its own commit adds is read; and again below against the list the
+	// mesh publishes, before it is registered.
+	list, err := judgedWith(result)
+	if err != nil {
+		return catalogue.Manifest{}, kept, fmt.Errorf("%s built %s (%s), recorded and not registered: %w", result.On,
+			result.Repository, short(result.Commit), err)
+	}
+	manifest, err := catalogue.ParseManifestWith(kept.Manifest, list)
+	if err != nil {
+		return catalogue.Manifest{}, kept, fmt.Errorf("%s built %s and what came back is not a manifest: %w",
+			result.On, result.Repository, err)
+	}
+	recorded := inventory.Source{
+		Repository: result.Repository, Path: result.Path, Ref: result.Ref,
+		BuiltFrom: result.Commit, Head: result.Commit,
+		// What it stood on, so registration can judge a built manifest's base (to-be 38 WP2.4).
+		Against: kept.Against,
+		// When it was asked, so an older request heard later does not replace a newer one
+		// (novox/hq 04-ISSUES/219).
+		Asked: kept.Asked,
+	}
+	if result.Source != nil && result.Source.Seat != "" {
+		recorded.Repository, recorded.Seat = result.Source.Repository, result.Source.Seat
+	}
+	// **A build at a commit does not change the branch a module follows** (novox/hq 04-ISSUES/215):
+	// the commit is built and recorded as what it was built from, and the module keeps following
+	// what it followed before — the repository's default branch for one new to the catalogue.
+	if followedBranch(result.Ref) == "" && result.Ref != "" {
+		recorded.Ref = ""
+		if was, err := inv.SourceOf(ctx, manifest.Module); err == nil {
+			recorded.Ref = followedBranch(was.Ref)
+		}
+	}
+	trunk := result.Trunk
+	if was, err := inv.SourceOf(ctx, manifest.Module); err == nil && followedBranch(was.Ref) != "" {
+		trunk = followedBranch(was.Ref)
+	}
+	if trunk == "" {
+		trunk = "main"
+	}
+	j := takenBuild{kept: kept, manifest: manifest, recorded: recorded, ask: registrationAsk{Build: result.ID}, path: result.Path,
+		trunk: trunk, by: result.On, what: result.Repository, commit: result.Commit}
+	// The checks only an outcome of build-agent needs: a key is a trunk build by construction (ADR 0501 §2), in no
+	// scratch namespace, and carries no list of its own.
+	j.published = func() error {
+		// **Only a commit on the trunk is published** (novox/hq ADR 0238): a commit off its repository's
+		// default branch — a pull request's head, a feature branch built by hand, a `rebuild` or `replay
+		// --register` of one — is for checking, and is never a module's version; nothing could then send it.
+		// The branch the module already follows is its trunk — never the branch a build was asked at, or a
+		// build of a feature branch by name would make that branch its trunk.
+		follows := ""
+		if was, err := inv.SourceOf(ctx, manifest.Module); err == nil {
+			follows = followedBranch(was.Ref)
+		}
+		if err := publishable(result, follows); err != nil {
+			return err
+		}
+		return nil
+	}
+	j.carried = func() error {
+		// **The newest trunk build's list of predefined keys is published** (novox/hq ADR 0348 §7): a build of the
+		// catalogue that may be registered keeps its list when its commit is newer than the one kept.
+		carried, err := carriedList(result)
+		if err != nil {
+			return err
+		}
+		if carried != nil {
+			if err := publishPredefined(ctx, inv, result, carried); err != nil {
+				fmt.Printf("%s: the list of predefined keys it carried is not published: %v\n", result.ID, err)
+			}
+		}
+		return nil
+	}
+	manifest, err = registerJudged(ctx, inv, j)
+	return manifest, kept, err
+}
+
+// errOffTheTrunk is a build of a commit off its repository's trunk, which is never published.
+var errOffTheTrunk = errors.New("the commit is not on its repository's trunk: a commit off the trunk is checked, " +
+	"never published (ADR 0238) — merge it, and the merge builds it")
+
+// publishable says whether a build's outcome may become a module's version: its commit on the module's
+// trunk, as the build seat read the forge at the build — the branch the module follows when its source
+// names one, else its repository's default branch. A build seat that could not say — one older than the
+// rule, building its own successor — is let through and said, so the rule can reach the mesh.
+func publishable(result link.BuildResult, follows string) error {
+	if result.DryRun {
+		return errors.New("a dry run is never published")
+	}
+	if result.Trunk == "" {
+		fmt.Printf("%s: the build seat did not say whether %s is on its repository's trunk (it predates ADR 0238); "+
+			"registered as before\n", result.ID, short(result.Commit))
+		return nil
+	}
+	trunk := result.Trunk
+	if follows != "" {
+		trunk = follows
+	}
+	on := slices.Contains(result.Branches, trunk) || (trunk == result.Trunk && result.OnTrunk)
+	if !on {
+		return fmt.Errorf("%w (%s is not on %s)", errOffTheTrunk, short(result.Commit), trunk)
+	}
+	return nil
+}
+
+// fromTheCatalogue is whether a build is of the catalogue's repository, whose list alone the mesh publishes: by
+// its name, in the URL form or the seat form.
+func fromTheCatalogue(result link.BuildResult) bool {
+	for _, repository := range []string{result.Repository, sourceRepository(result)} {
+		name := strings.TrimSuffix(path.Base(strings.TrimRight(repository, "/")), ".git")
+		if name == catalogue.CatalogueRepository {
+			return true
+		}
+	}
+	return false
+}
+
+func sourceRepository(result link.BuildResult) string {
+	if result.Source == nil {
+		return ""
+	}
+	return result.Source.Repository
+}
+
+// carriedList is the list a build of the catalogue carried, read strictly; nil for a build of another
+// repository, or one that carried none.
+func carriedList(result link.BuildResult) (catalogue.PredefinedList, error) {
+	if result.Predefined == nil || !fromTheCatalogue(result) {
+		return nil, nil
+	}
+	list, err := catalogue.ParsePredefined(result.Predefined.Keys)
+	if err != nil {
+		return nil, fmt.Errorf("%s carried a list of predefined keys that is refused: %w", result.ID, err)
+	}
+	return list, nil
+}
+
+// judgedWith is the list a build's manifest is first judged against at registration: the catalogue's own at the
+// commit built, which its build judged it against, where it carried one; the list kept otherwise.
+func judgedWith(result link.BuildResult) (catalogue.PredefinedList, error) {
+	list, err := carriedList(result)
+	if err != nil || list != nil {
+		return list, err
+	}
+	return catalogue.PublishedPredefined(), nil
+}
+
+// publishPredefined keeps a trunk build's list when it is newer than the one kept, says so, and loads what the
+// store keeps then — this build's, or a newer one another controller process kept.
+func publishPredefined(ctx context.Context, inv *inventory.Inventory, result link.BuildResult,
+	list catalogue.PredefinedList) error {
+	kept, err := inv.KeepPredefined(ctx, inventory.PredefinedRecord{Keys: list, Repository: result.Repository,
+		Commit: result.Commit, Generation: result.Predefined.Generation, Build: result.ID})
+	if err != nil {
+		return err
+	}
+	if kept {
+		fmt.Printf("%s: the list of predefined keys at %s (generation %d) is published: %s\n", result.ID,
+			short(result.Commit), result.Predefined.Generation, strings.Join(list.Keys(), ", "))
+	} else {
+		fmt.Printf("%s: the list of predefined keys at %s (generation %d) is not newer than the one kept, which "+
+			"stands\n", result.ID, short(result.Commit), result.Predefined.Generation)
+	}
+	return loadPredefined(ctx, inv)
+}
+
+// builds is what the tests of a pending assignment feed an outcome to: the take-in above, then the tick that settles what
+// waited for it (settlePending), as the daemon's hearing of an outcome did before R4g (it also moved the plans, which the
+// walk now does from its keys). Nothing in the controller calls it.
+type builds struct {
+	inv  *inventory.Inventory
+	open *stores
+}
+
+func (b builds) Built(ctx context.Context, result link.BuildResult) error {
+	_, _, err := takeIn(ctx, b.inv, result)
+	if b.open != nil {
+		settlePending(ctx, b.open, time.Now())
+	}
+	if result.Failed != "" {
+		return nil // the build is recorded; whether it registered is what the tests read
+	}
+	return err
+}

cmd/mesh-controller/loop_own_consumers_test.go

@@ -34,16 +34,6 @@ func deafObservations(now time.Time, held func(broker.Consumer) (uint64, error))
 	return obs[0].Said, len(obs)
 }
 
-// 1063/AC1: a check in flight on a builder is not the controller's event loop being deaf.
-func TestDeafLookIgnoresCheckWorkers(t *testing.T) {
-	now := time.Now()
-	for _, w := range broker.CheckWorkers() {
-		if said, n := deafObservations(now, holdingOne(w.Stream+"/"+w.Name)); n != 0 {
-			t.Fatalf("%s holding one message raised controller-deaf: %s", w.Name, said)
-		}
-	}
-}
-
 // 1063/AC2: a message held by one of the controller's own consumers is still deaf, naming its stream.
 func TestDeafLookStillCountsOwnConsumers(t *testing.T) {
 	now := time.Now()
@@ -55,25 +45,16 @@ func TestDeafLookStillCountsOwnConsumers(t *testing.T) {
 	}
 }
 
-// 1063/AC3: the list is the controller's consumers and none of the check workers.
+// 1063/AC3: the list is the controller's consumers: the mesh defines no other durable consumer the loop could read (the
+// check workers went with the checks' queues, ADR 0525 clause 6).
 func TestDeafLookReadsExactlyTheControllersOwnConsumers(t *testing.T) {
-	workers := map[string]bool{}
-	for _, w := range broker.CheckWorkers() {
-		workers[w.Stream+"/"+w.Name] = true
-	}
 	want := map[string]bool{}
 	for _, c := range broker.MeshConsumers() {
-		if !workers[c.Stream+"/"+c.Name] {
-			want[c.Stream+"/"+c.Name] = true
-		}
+		want[c.Stream+"/"+c.Name] = true
 	}
 	got := map[string]bool{}
 	for _, c := range loopConsumers() {
-		k := c.Stream + "/" + c.Name
-		if workers[k] {
-			t.Errorf("the deaf look reads the check worker %s", k)
-		}
-		got[k] = true
+		got[c.Stream+"/"+c.Name] = true
 	}
 	if len(got) != len(want) {
 		t.Fatalf("deaf look reads %v, want %v", got, want)

cmd/mesh-controller/main.go

@@ -8,7 +8,6 @@ package main
 
 import (
 	"context"
-	"errors"
 	"flag"
 	"fmt"
 	"os"
@@ -19,7 +18,6 @@ import (
 	"github.com/novox/mesh-controller/internal/identity"
 	"github.com/novox/mesh-controller/internal/inventory"
 	"github.com/novox/mesh-controller/internal/licences"
-	"github.com/novox/mesh-controller/internal/link"
 	"github.com/novox/mesh-controller/internal/store"
 )
 
@@ -54,6 +52,8 @@ func run() error {
 		return fmt.Errorf("no command given")
 	}
 
+	// The bus's users are composed from what each module announced it keeps (novox/hq ADR 0495, issue 1790).
+	inventory.Announcements = readAnnouncements
 	// Every connection this process dials says what it is (novox/hq issue 327).
 	broker.ConnectionName = connectionName(args[0], os.Getenv(verbVar))
 
@@ -73,10 +73,13 @@ func run() error {
 	}
 
 	switch args[0] {
-	case "build":
-		return buildCommand(ctx, args[1:])
-	case "builder":
-		return builderCommand(ctx, args[1:])
+	case "switch":
+		return switchCommand(ctx, args[1:])
+	case "register":
+		return registerCommand(ctx, args[1:])
+	case "build", "rebuild":
+		// **The hand build goes with the asks** (novox/hq ADR 0501 §5): refused by name, naming the replacement.
+		return removedByName(args[0])
 	case "board":
 		return boardCommand(ctx, args[1:])
 	case "api":
@@ -91,25 +94,10 @@ func run() error {
 		return rehearseCommand(ctx, args[1:])
 	case "builds":
 		return buildsCommand(ctx, args[1:])
-	// The build queue, controlled by hand (novox/hq ADR 0219).
-	case "queue":
-		return queueCommand(ctx, args[1:])
-	case "cancel":
-		return cancelCommand(ctx, args[1:])
-	case "clear":
-		return clearCommand(ctx, args[1:])
-	case "rebuild":
-		return rebuildCommand(ctx, args[1:])
-	case "replay":
-		return replayCommand(ctx, args[1:])
-	case "kill":
-		return killCommand(ctx, args[1:])
-	case "forget-checks":
-		return forgetChecksCommand(ctx, args[1:])
+	case "forget-checks", "queue", "cancel", "clear", "kill", "replay", "pause", "resume":
+		return removedByName(args[0])
 	case "try":
 		return tryCommand(ctx, args[1:])
-	case "pause", "resume":
-		return pauseCommand(ctx, args[0], args[1:])
 	case "collection":
 		return collectionCommand(ctx, args[1:])
 	// What the records say the registries may keep, asked on demand (novox/hq ADR 0251).
@@ -152,12 +140,6 @@ func run() error {
 	// The facts snapshot a merge check is fed (novox/hq to-be 45 §9).
 	case "facts":
 		return factsCommand(ctx, args[1:])
-	// The merge gate: every machine of the snapshot composed with a change (novox/hq to-be 45 §9).
-	case "merge-gate":
-		return mergeGateCommand(ctx, args[1:])
-	// A pull request's merge check run here exactly as the build seat runs it (novox/hq issue 286).
-	case "check-here":
-		return checkHereCommand(ctx, args[1:])
 	case "upgrade":
 		return upgradeCommand(ctx, args[1:])
 	// The bus as a planned step (novox/hq to-be 45 §8, ADR 0236).
@@ -232,8 +214,8 @@ func run() error {
 	}
 }
 
-func usage() {
-	fmt.Fprint(os.Stderr, `mesh-controller — the control plane
+// usageText is the terminal's help: every command it has, and none it refuses as removed (removedByName).
+var usageText = `mesh-controller — the control plane
 
   On a node the operator types these as 'mesh-cli <command>' (in zsh, 'nox <command>'): asked
   through the node's engine, and run as the controller's terminal only on the control-node
@@ -307,17 +289,12 @@ func usage() {
   operator key make [--out <file>]          make the operator's sealing key, off the mesh; private half to the file only
   operator key set <public> [--replace]     tell the mesh which operator key to seal to
   operator key show                         the operator key, and what it can recover
-  build <repository> [--ref R]   have a build machine build it, and record what came out
-  build --behind                 build every module the mesh holds older than its source
-  build --on <module>            rebuild every module that stands on this module's artifacts, bases first
-  builds [<module>]              what has been built lately, and what came of it
-  queue [--json]                 every ask in the build queue: waiting, in flight (where, how long), dead
-  cancel <id>                    drop a waiting or dead ask; recorded failed, cancelled by hand
-  clear [--dead]                 cancel every waiting ask (and the dead ones); never one in flight
-  rebuild <module|build-id>      ask the module's source again, or that build's, under a new id
-  replay <build-id> [--register [--older]]   that build's commit again; a dry run unless --register
-  kill <id>                      end a build where it runs; recorded failed, killed by hand
-  pause [<node>] / resume [<node>]   the build seat's holder there, or every holder, takes nothing new / again
+  register <module> <owner>/<repository> <path>   register a module from a repository the catalogue does not
+                                 build, from the builder's done key of its fingerprint (ADR 0501 §4); with
+                                 --reference <artifact>=<reference> (repeatable) and --why, at artifacts the store
+                                 holds, recorded as a build by hand (ADR 0526 §3)
+  switch [--json]                the switch's list: each module, the build it runs, and what the builder holds
+  builds [<module>] [-n N]       what has been built lately: the builder's done keys, recorded as builds
   plans retry <id>               ask a failed plan's failed builds again, and carry the plan on
   plans stop|close <id> --why <text>   end a plan by hand; recorded in the hand-act log
   hand-act record <what> --why <text> --cause <word> [--condition <key>]
@@ -334,8 +311,6 @@ func usage() {
   durations [--kind K] [--days N] [--json]
                                  apply, heartbeat, plan-tier, build and walk-phase durations
   collection [--json]            kept archives held/unheld by a manifest, and what the sweep may let go
-  builder issue <name>           a broker account for a build machine, scoped to build work,
-                                 delivered as the builder module's broker secret (module add it first)
   licence add|list|use|key       model access, under the name a person calls it
   licence manager <name> <node>  the node that holds a refreshable licence's refresh token
   licence refresh <name>         mint a new access token and seal it to every holder
@@ -350,10 +325,13 @@ func usage() {
   version                        what this binary is
 
 Each context reaches its own store through its own credential (novox/hq ADR 0008), named
-`+store.Variable("<context>")+` — or `+store.FileVariable("<context>")+`, naming a file that holds
+` + store.Variable("<context>") + ` — or ` + store.FileVariable("<context>") + `, naming a file that holds
 the same thing and keeps the password out of the environment. This process holds:
 
-`)
+`
+
+func usage() {
+	fmt.Fprint(os.Stderr, usageText)
 	for _, c := range held {
 		fmt.Fprintf(os.Stderr, "  %-12s database %-12s from %s\n",
 			c.name, store.Database(c.name), store.Variable(c.name))
@@ -383,84 +361,6 @@ func parseAround(set *flag.FlagSet, args []string) ([]string, error) {
 	}
 }
 
-// Built is the daemon hearing a build's outcome on the bus — its own asking, an announcement's, or
-// a tool's that did not wait (novox/hq issue 176) — and taking it in: recorded, and the module
-// registered, the same as the waiting command does. Said either way, so the daemon's log tells what
-// became of a build nobody was watching.
-func (b builds) Built(ctx context.Context, result link.BuildResult) error {
-	// **A merge check builds nothing** (novox/hq to-be 45 §9): its verdict is said, and nothing of it is
-	// recorded or registered.
-	if result.Check != nil || result.Checked != nil {
-		if isTry(result) {
-			// A branch tried before its pull request (novox/hq issue 686): its asker reads the outcome from the
-			// build's log. Never said as `checked`, so the forge's holder sets no status.
-			fmt.Printf("%s: a try of %s at %.8s, read with `try --id`: said to nobody, nothing taken in\n", result.ID,
-				result.Repository, result.Ref)
-			return nil
-		}
-		checked(ctx, result)
-		return nil
-	}
-	// **A dry run is looked at, never taken in** (novox/hq issue 240). On 2026-10-04 a dry run of an
-	// unmerged branch was heard here like any build, registered, and its definition reached a machine
-	// before anyone had reviewed it.
-	if result.DryRun {
-		fmt.Printf("%s: a dry run of %s on %s, not taken in\n", result.ID, result.Repository, result.Ref)
-		return nil
-	}
-	manifest, _, err := takeIn(ctx, b.inv, result)
-	// The assignments pending on this build, made or ended (novox/hq issue 325), said in the daemon's log
-	// after what became of the build.
-	if b.open != nil {
-		defer func() {
-			for _, line := range settlePendingOnBuild(ctx, b.open, result, manifest.Module, err) {
-				fmt.Printf("%s: %s\n", result.ID, line)
-			}
-		}()
-	}
-	// When it was asked, so a plan takes as its outcome only a build asked for it or after it
-	// (novox/hq 04-ISSUES/219). Zero when the id does not say.
-	asked, _ := link.BuildAskedAt(result.ID)
-	// And how long it took, asked to heard, which a build's bound will be set from (novox/hq to-be 45
-	// Phase 0). Said if lost; never a reason not to take the build in.
-	recordBuildDuration(ctx, b.inv, result, asked)
-	switch {
-	case err != nil && result.Failed != "":
-		fmt.Printf("%s: %v\n", result.ID, err)
-		if result.Module != "" {
-			planBuilt(ctx, b.open, result.Module, result.Commit, result.Failed, asked, result.ID)
-		} else {
-			planFailedBuild(ctx, b.open, result)
-		}
-		return nil
-	case errors.Is(err, inventory.ErrSuperseded):
-		// Not a failure: the module is already at what a later request built. A plan that asked
-		// before that later request is answered by it; one that asked after it ignores this.
-		fmt.Printf("%s: %v\n", result.ID, err)
-		planBuilt(ctx, b.open, manifest.Module, result.Commit, "", asked, result.ID)
-		return nil
-	case err != nil:
-		fmt.Printf("%s: heard and recorded, and not registered: %v\n", result.ID, err)
-		if manifest.Module != "" {
-			planBuilt(ctx, b.open, manifest.Module, result.Commit, err.Error(), asked, result.ID)
-		}
-		return nil
-	}
-	fmt.Printf("%s: %s %s registered, built on %s from %s\n",
-		result.ID, manifest.Module, manifest.Version, result.On, short(result.Commit))
-	// What the walk's build did, kept on the walk whose ask it answers (novox/hq ADR 0350 §4); a build seat from
-	// before it says nothing, and that is what is kept.
-	made := result.MadeWords()
-	if result.Reused != "" || result.BuiltWhy != "" {
-		fmt.Printf("%s: %s %s\n", result.ID, manifest.Module, made)
-	}
-	saysWhenThePolicyActs(ctx, b.inv, manifest.Module)
-	planBuiltSaying(ctx, b.open, manifest.Module, result.Commit, "", asked, result.ID, made)
-	// A module registered may be one a machine is now behind: `status` is composed again.
-	statusFrom.nudge()
-	return nil
-}
-
 // verbVar carries the seat verb a command runs for, from the serving controller to the process it starts.
 const verbVar = "MESH_VERB"
 
@@ -475,3 +375,40 @@ func connectionName(command, verb string) string {
 	}
 	return "mesh-controller command " + command
 }
+
+// removedByName refuses a command the controller no longer has, naming what replaced it (novox/hq ADR 0501 §4, §5;
+// ADR 0429 §18; ADR 0503 §3; issue 1851, A11, and issue 1318).
+func removedByName(command string) error {
+	replacement := map[string]string{
+		"build": "the controller asks no build (ADR 0501 §5): the builder builds every fingerprint the indexer writes, a " +
+			"module is registered from its done key, and a branch is tried with `try`; a module from a repository the " +
+			"catalogue does not build is registered at the controller's terminal with `register`",
+		"rebuild": "the controller asks no build (ADR 0501 §5): a failed key is built again by the builder as a new " +
+			"revision (ADR 0429 §18), and a walk's Retry waits for it",
+		"replay": "the controller asks no build, so there is nothing to replay (ADR 0501 §5, ADR 0525 clause 6); a branch is " +
+			"tried with `try`",
+		"queue": "the controller keeps no build queue (ADR 0525 clause 6): the builds and checks are asks on the build modules' " +
+			"streams, and the delivery view shows their backlog and the oldest ask's age",
+		"cancel": "the controller keeps no build queue (ADR 0525 clause 6): an ask is on a build module's stream, and the delivery " +
+			"view shows the backlog",
+		"clear": "the controller keeps no build queue (ADR 0525 clause 6): an ask is on a build module's stream, and the delivery " +
+			"view shows the backlog",
+		"kill": "the controller keeps no build queue and starts no build (ADR 0525 clause 6): a build runs on a build module, " +
+			"which ends it",
+		"pause": "the build seat is retired (ADR 0525 clause 7): a node's builds are paused with its build module's own pause, " +
+			"or a capacity of 0",
+		"resume": "the build seat is retired (ADR 0525 clause 7): a node's builds are resumed with its build module's own " +
+			"resume, or its capacity",
+		"forget-checks": "build-agent makes no check build from R4e (ADR 0503 §3), so there is nothing to let go of",
+		"delivery-plan": "a delivery's plan is read with `delivery-order` and the checker's verdict (ADR 0503 §3)",
+		"delivery-check": "the checker judges every head and every delivery group (ADR 0503 §3, ADR 0527): the controller asks " +
+			"nothing and says no verdict of a pull request",
+	}[command]
+	return &removedCommand{msg: fmt.Sprintf("`%s` is removed: %s", command, replacement)}
+}
+
+// removedCommand is a command or verb the controller no longer has: a refusal that is the verb's whole answer, not a
+// verb of a newer build this one cannot run.
+type removedCommand struct{ msg string }
+
+func (r *removedCommand) Error() string { return r.msg }

cmd/mesh-controller/members_file_test.go

@@ -47,18 +47,6 @@ func readBackFromTheCommand(t *testing.T, argv []string, members string) {
 	}
 }
 
-func TestDeliveryCheckHandsALongMembersListInAFile(t *testing.T) { // 1272/AC1
-	members := aLongGroup(t)
-	argv, err := argvFor("delivery-check", map[string]any{"group": "feat/x", "members": members})
-	if err != nil {
-		t.Fatal(err)
-	}
-	if argv[0] != "delivery" || argv[1] != "check" || !slices.Contains(argv, "--group") {
-		t.Errorf("the command is %.100v", strings.Join(argv, " "))
-	}
-	readBackFromTheCommand(t, argv, members)
-}
-
 func TestDeliveryOrderHandsALongMembersListInAFile(t *testing.T) { // 1272/AC2
 	members := aLongGroup(t)
 	argv, err := argvFor("delivery-order", map[string]any{"members": members})
@@ -73,8 +61,8 @@ func TestDeliveryOrderHandsALongMembersListInAFile(t *testing.T) { // 1272/AC2
 
 func TestAShortMembersListIsStillTheArgumentItWas(t *testing.T) { // 1272/AC3
 	members := `[{"id":"novox/a#1"},{"id":"novox/b#2"}]`
-	argv, err := argvFor("delivery-check", map[string]any{"group": "feat/x", "members": members, "ready": "true"})
-	want := []string{"delivery", "check", "--group", "feat/x", "--members", members, "--ready"}
+	argv, err := argvFor("delivery-order", map[string]any{"members": members})
+	want := []string{"delivery", "order", "--members", members}
 	if err != nil || !slices.Equal(argv, want) {
 		t.Errorf("a short list gives %v, %v, want %v", argv, err, want)
 	}

cmd/mesh-controller/merge_check_nested_test.go

@@ -1,72 +0,0 @@
-//go:build integration
-
-package main
-
-import (
-	"os"
-	"os/exec"
-	"path/filepath"
-	"strings"
-	"testing"
-)
-
-// **A repository's merge check runs every module's unit tests, a Go module of its own below the root included**
-// (novox/hq ADR 0420 §5, issue 1025): `./...` stops at a nested go.mod. This runs the script
-// check-nested-modules.sh in a tree with a `go` that only records where it was run and fails for a module named bad.
-func TestTheMergeCheckVetsAndTestsEveryNestedGoModule(t *testing.T) {
-	script, err := filepath.Abs("../../check-nested-modules.sh")
-	if err != nil {
-		t.Fatal(err)
-	}
-	bin, tree := t.TempDir(), t.TempDir()
-	log := filepath.Join(t.TempDir(), "go.log")
-	fake := "#!/bin/sh\necho \"$(basename \"$PWD\") $1 GOFLAGS=[$GOFLAGS]\" >>\"$LOG\"\n" +
-		"[ \"$(basename \"$PWD\")\" = bad ] && [ \"$1\" = test ] && exit 1\nexit 0\n"
-	if err := os.WriteFile(filepath.Join(bin, "go"), []byte(fake), 0o755); err != nil {
-		t.Fatal(err)
-	}
-	run := func() (string, error) {
-		cmd := exec.Command("sh", script)
-		cmd.Dir = tree
-		cmd.Env = append(os.Environ(), "PATH="+bin+":"+os.Getenv("PATH"), "LOG="+log, "GOFLAGS=-mod=vendor")
-		out, err := cmd.CombinedOutput()
-		return string(out), err
-	}
-	// No modules directory: a pass, nothing run.
-	if out, err := run(); err != nil {
-		t.Fatalf("a repository with no nested module failed: %v\n%s", err, out)
-	}
-	if _, err := os.Stat(log); err == nil {
-		t.Fatal("go ran with no nested module")
-	}
-	for _, m := range []string{"good", "bad", "other"} {
-		dir := filepath.Join(tree, "modules", m)
-		if err := os.MkdirAll(dir, 0o755); err != nil {
-			t.Fatal(err)
-		}
-		if err := os.WriteFile(filepath.Join(dir, "go.mod"), []byte("module x\n"), 0o644); err != nil {
-			t.Fatal(err)
-		}
-	}
-	// A directory with no go.mod is no Go module of its own.
-	if err := os.MkdirAll(filepath.Join(tree, "modules", "typescript"), 0o755); err != nil {
-		t.Fatal(err)
-	}
-	out, err := run()
-	if err == nil {
-		t.Fatalf("a nested module whose tests fail passed the check:\n%s", out)
-	}
-	raw, _ := os.ReadFile(log)
-	ran := string(raw)
-	for _, want := range []string{"good vet GOFLAGS=[]", "good test GOFLAGS=[]", "other test GOFLAGS=[]", "bad test GOFLAGS=[]"} {
-		if !strings.Contains(ran, want) {
-			t.Errorf("%q was not run, nor outside the vendor directory:\n%s", want, ran)
-		}
-	}
-	if strings.Contains(ran, "typescript") {
-		t.Errorf("a directory with no go.mod was run:\n%s", ran)
-	}
-	if !strings.Contains(out, "nested module modules/bad FAILED") {
-		t.Errorf("the failing module is not named:\n%s", out)
-	}
-}