Run the controller as a Go bundle the host starts as a process (hq issue 213)

The controller is a Go program and was the one piece of the mesh's own Go code still shipped and run as an image (novox/hq issue 213; ADR 0188 §1: a module's own code is bundles; §3: a service bundle is a process). The manifest now builds one Go bundle, `controller`, and runs it as the process `mesh-controller` (`./mesh-controller serve`) under an account the module declares. What the container gave it, replaced: - host network: a process is on the host's network; nothing it reads names a container network - user 65534: the account `mesh-controller`, which owns its secrets and its state directory - the eight mounts: the env names the host paths the mesh already places (the store, broker and bus files under the state directory, the broker's certificate under /var/lib/mesh-broker-tls); the `broker` mount was read by nothing and is gone with the others - `container-runtime` is no longer required on its machine Its preparation is the same binary with `prepare`, as a run-once process, and the process `replaces` the container `server`: the host keeps the container answering until the process is running (mesh-host). Needs the previous commit live in the running controller, and the host's `replaces` on the controller's machine, before it is registered. No image is built by the mesh any more. The Dockerfile stays for genesis and the lab (`make image`, its Go base now pinned in the Makefile).
2026-10-04 01:11:31 +02:00
33 changed files with 56 additions and 2734 deletions
@@ -1,11 +1,6 @@
-# The Go it builds with, pinned here because genesis builds this file with no arguments (novox/hq
+ARG GO_BASE=golang:1.25-alpine
 # issue 223) — the Makefile passes the same digest. A tag older than go.mod asks for is how
 # `make image` broke once before (issue 146).
 ARG GO_BASE=golang@sha256:8ac98ca534ac3f51e1f420a1dd2c15e74c75cfa0f23f3ad27eb5d7236c349a0c
 # The control plane's image — for genesis and the lab only. The mesh runs the controller as a Go
 # bundle the host starts as a process (module.json; novox/hq issue 213), and builds no image of it.
 # Genesis builds this file and raises it as the container the process replaces on the first push
 # (mesh-host internal/bootstrap, novox/hq issue 223).
 #
 # novox/hq ADR 0006: this image is pinned by digest in the bundle the host carries, fetched on a
 # machine where no mesh exists yet, and run before there is anything to check it against. So it
@@ -558,10 +558,6 @@ func takeIn(ctx context.Context, inv *inventory.Inventory, result link.BuildResu
 		}
 		return manifest, kept, err
 	}
 	// The keep set just moved, and new bytes just landed (novox/hq ADR 0189). Asked here rather
 	// than on a timer of its own: this is the only moment either is true. Never fatal — the build
 	// worked and the module is registered.
 	collect(ctx, inv)
 	return manifest, kept, nil
 }
@@ -7,7 +7,6 @@ import (
 	"os"
 	"path/filepath"
 	"sort"
 	"strings"
 	"github.com/novox/mesh-controller/internal/catalogue"
 )
@@ -91,17 +90,6 @@ func moduleCheck(paths []string, out io.Writer) error {
 		if len(m.Invokes) > 0 {
 			fmt.Fprintf(out, ", invokes %s", joinInvokes(m.Invokes))
 		}
 		// The state it keeps and reads (novox/hq ADR 0201), so a reviewer sees what lands on the bus.
 		if len(m.State) > 0 {
 			kept := make([]string, 0, len(m.State))
 			for _, s := range m.State {
 				kept = append(kept, s.Name)
 			}
 			fmt.Fprintf(out, ", keeps state %s", strings.Join(kept, ", "))
 		}
 		if len(m.Reads) > 0 {
 			fmt.Fprintf(out, ", reads %s", strings.Join(m.Reads, ", "))
 		}
 		fmt.Fprintln(out)
 	}
 	if failed > 0 {
@@ -1,108 +0,0 @@
 package main
 import (
 	"context"
 	"errors"
 	"fmt"
 	"os"
 	"time"
 	"github.com/novox/mesh-controller/internal/artifacts"
 	"github.com/novox/mesh-controller/internal/inventory"
 )
 // Letting the artifact store go of what the mesh no longer keeps (novox/hq ADR 0189, issue 108).
 //
 // **Run where the records change.** A build is the moment new bytes landed in the store and the
 // moment the keep set moved, so it is the moment to say what may go — and it needs no timer of
 // its own. Reclaiming the bytes is the store's own nightly step; this only decides.
 //
 // Never fatal to a build. The build succeeded, the module is registered, and a store that could
 // not be reached is a thing to say rather than a reason to undo any of that. The next build asks
 // again, and the references it could not collect are still uncollected, so nothing is lost by
 // having failed.
 // collect asks the store to let go of everything the mesh made and no longer keeps, and records
 // what it let go of. Says what it did and what it could not; returns nothing, because nothing
 // upstream should branch on it.
 func collect(ctx context.Context, inv *inventory.Inventory) {
 	references, err := inv.ToCollect(ctx)
 	if err != nil {
 		fmt.Fprintf(os.Stderr, "could not work out what the artifact store may let go of: %v\n", err)
 		return
 	}
 	if len(references) == 0 {
 		return
 	}
 	shelf, err := inv.Catalogue(ctx)
 	if err != nil {
 		fmt.Fprintf(os.Stderr, "could not read the catalogue to find the artifact store: %v\n", err)
 		return
 	}
 	// As the mesh reaches it from the network. Empty means the store is not on the network — on a
 	// mesh being raised it is not yet, and there the store holds one build of anything and has
 	// nothing to collect.
 	address, err := artifactStoreAddress(ctx, inv, shelf, "")
 	if err != nil || address == "" {
 		if err != nil {
 			fmt.Fprintf(os.Stderr, "could not find the artifact store to collect from: %v\n", err)
 		}
 		return
 	}
 	// **Bounded, because this runs inside somebody's build.** The first sweep of a mesh that has
 	// never collected has the whole history to get through, and a person waiting on `build` should
 	// not pay for it. Two bounds, and what is left over is simply offered again next time —
 	// builds are frequent, and the point is that the store stops growing, not that it empties
 	// tonight.
 	within, stop := context.WithTimeout(ctx, sweepBudget)
 	defer stop()
 	store := artifacts.Store{Address: address}
 	var done []string
 	var left int
 	for i, reference := range references {
 		if i >= mostPerSweep || within.Err() != nil {
 			left = len(references) - i
 			break
 		}
 		err := store.LetGo(within, reference)
 		if err == nil || errors.Is(err, artifacts.Gone) {
 			// Gone is the outcome wanted, already true. Recorded so the next sweep does not ask
 			// again for ever.
 			done = append(done, reference)
 			continue
 		}
 		// **Stopped at the first refusal, not pushed through.** A store that refuses one refuses
 		// all of them — deletion disabled, the store down, the network gone — so going on would
 		// be a hundred identical failures and a hundred identical log lines in front of whoever
 		// was building something.
 		fmt.Fprintf(os.Stderr, "the artifact store kept %s, so nothing more was asked of it: %v\n",
 			reference, err)
 		left = len(references) - i
 		break
 	}
 	if len(done) > 0 {
 		// Recorded outside `within`: the deletions happened, and losing the record of them because
 		// the sweep ran out of budget would mean asking about them again for ever.
 		if err := inv.MarkCollected(ctx, done); err != nil {
 			fmt.Fprintf(os.Stderr, "the store let go of %d artifact(s) and the record of it did not keep: %v\n",
 				len(done), err)
 			return
 		}
 		fmt.Fprintf(os.Stderr, "the artifact store let go of %d artifact(s) the mesh no longer keeps\n",
 			len(done))
 	}
 	if left > 0 {
 		fmt.Fprintf(os.Stderr, "%d more to collect; the next build asks again\n", left)
 	}
 }
 // mostPerSweep is how many artifacts one sweep will ask about. Enough that a mesh building
 // several times a day converges within days of this landing; small enough that no single build
 // waits on the whole backlog.
 const mostPerSweep = 200
 // sweepBudget is the longest a sweep will keep a build waiting.
 const sweepBudget = 60 * time.Second
@@ -898,21 +898,6 @@ func raiseTheBus(ctx context.Context, inv *inventory.Inventory, address string)
 	if err := broker.RaiseSeats(js, inventory.MeshSeats(), holders); err != nil {
 		return err
 	}
 	// Every module's state (novox/hq ADR 0201), from the catalogue: a bucket exists from
 	// registration, so a module reading one may watch it before its owner runs anywhere. One that
 	// nothing declares any more is said and kept — what it holds is data.
 	buckets, err := inv.DeclaredBuckets(ctx)
 	if err != nil {
 		return err
 	}
 	undeclared, err := broker.RaiseBuckets(js, buckets)
 	if err != nil {
 		return err
 	}
 	if len(undeclared) > 0 {
 		fmt.Printf("the bus holds state nothing declares any more, kept because it is data: %s — "+
 			"removing it is a person's act\n", strings.Join(undeclared, ", "))
 	}
 	// And how every module hears what it consumes. Derived from the same records the user list is
 	// composed from, so a module the mesh grants a consumer's subjects has that consumer waiting.
 	// Done on every raise, not only when a credential is issued: every module moved onto this bus
@@ -936,8 +921,8 @@ func raiseTheBus(ctx context.Context, inv *inventory.Inventory, address string)
 		}
 		hearing++
 	}
-	fmt.Printf("the bus at %s has its streams, %d machine(s) can hear a declaration, %d module(s) "+
+	fmt.Printf("the bus at %s has its streams, %d machine(s) can hear a declaration, and %d module(s) "+
-		"can hear what they consume, and %d bucket(s) of state\n", broker.BareAddress(address), len(names), hearing, len(buckets))
+		"can hear what they consume\n", broker.BareAddress(address), len(names), hearing)
 	return nil
 }
@@ -1,99 +0,0 @@
 // Package artifacts speaks to the mesh's artifact store over its own door.
 //
 // Only what the mesh needs that nothing else does: letting go of something it put there
 // (novox/hq ADR 0189, issue 108). Pushing is the builder's, through the container runtime; reading
 // is every machine's, through its runtime. This is the one operation that belongs to the thing
 // holding the records, because it is the only one that is a decision rather than a transfer.
 package artifacts
 import (
 	"context"
 	"fmt"
 	"net/http"
 	"strings"
 	"time"
 	"github.com/novox/mesh-controller/internal/catalogue"
 )
 // Store is the artifact store at an address, as this machine reaches it.
 type Store struct {
 	// Address is `host:port` — the store as the caller reaches it now, composed and never
 	// recorded (novox/hq 04-ISSUES/102).
 	Address string
 	// HTTP is the client used; nil is a client with a modest timeout.
 	HTTP *http.Client
 }
 // Gone is the answer when the store does not hold it: the outcome wanted, already true.
 var Gone = fmt.Errorf("the store does not hold it")
 // LetGo asks the store to drop one artifact the mesh recorded making.
 //
 // Takes a reference as the mesh records it — `artifact-store://<module>/<artifact>@sha256:…` for
 // an image, `…/blobs/sha256:…` for an archive — because that is the identity every record uses,
 // and composes the address here at the moment of use.
 //
 // Returns Gone when the store answers that it does not have it. That is not a failure: the sweep
 // wants the artifact absent, and it is. It is distinguished from success only so a caller can say
 // which of the two happened.
 func (s Store) LetGo(ctx context.Context, reference string) error {
 	path, kept := catalogue.InArtifactStore(reference)
 	if !kept {
 		// Nothing the mesh put in its own store. Refused rather than attempted: composing a
 		// delete for a reference of unknown shape is how a sweep reaches something that is not
 		// the mesh's.
 		return fmt.Errorf("%s is not a reference into the mesh's artifact store", reference)
 	}
 	if s.Address == "" {
 		return fmt.Errorf("this mesh has no artifact store on its network to ask about %s", reference)
 	}
 	repository, kind, digest, err := split(path)
 	if err != nil {
 		return err
 	}
 	url := "http://" + s.Address + "/v2/" + repository + "/" + kind + "/" + digest
 	request, err := http.NewRequestWithContext(ctx, http.MethodDelete, url, nil)
 	if err != nil {
 		return err
 	}
 	client := s.HTTP
 	if client == nil {
 		client = &http.Client{Timeout: 30 * time.Second}
 	}
 	response, err := client.Do(request)
 	if err != nil {
 		return err
 	}
 	defer response.Body.Close()
 	switch response.StatusCode {
 	case http.StatusAccepted, http.StatusOK, http.StatusNoContent:
 		return nil
 	case http.StatusNotFound:
 		return Gone
 	case http.StatusMethodNotAllowed:
 		// The registry was started without deletion enabled. Said plainly, because the remedy is
 		// a setting on the store's module and not anything about this artifact.
 		return fmt.Errorf(
 			"the artifact store refuses deletion: its server was started without it enabled "+
 				"(REGISTRY_STORAGE_DELETE_ENABLED), so nothing can be collected until the store "+
 				"module is applied again (novox/hq ADR 0189). Asking about %s", reference)
 	default:
 		return fmt.Errorf("the artifact store answered %s for %s", response.Status, reference)
 	}
 }
 // split reads a recorded path into the repository, which endpoint names the thing, and the digest.
 //
 // Two shapes, which are the two the mesh records: `<repository>@sha256:<hex>` is a manifest, and
 // `<repository>/blobs/sha256:<hex>` is a blob.
 func split(path string) (repository, kind, digest string, err error) {
 	if before, after, ok := strings.Cut(path, "@sha256:"); ok {
 		return before, "manifests", "sha256:" + after, nil
 	}
 	if before, after, ok := strings.Cut(path, "/blobs/sha256:"); ok {
 		return before, "blobs", "sha256:" + after, nil
 	}
 	return "", "", "", fmt.Errorf("%q names nothing the store holds by digest", path)
 }
@@ -1,94 +0,0 @@
 package artifacts
 import (
 	"context"
 	"errors"
 	"net/http"
 	"net/http/httptest"
 	"strings"
 	"testing"
 	"github.com/novox/mesh-controller/internal/catalogue"
 )
 // Asking the store to let go of what the mesh no longer keeps (novox/hq ADR 0189, issue 108).
 //
 // A fake store records what it was asked to delete, so what is asserted is the mesh's decision
 // and the shape of the request — not the registry's behaviour, which is the registry's to test.
 func fakeStore(t *testing.T, answer int) (Store, *[]string) {
 	t.Helper()
 	var asked []string
 	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		if r.Method != http.MethodDelete {
 			t.Errorf("the store was asked %s %s; collecting is a delete", r.Method, r.URL.Path)
 		}
 		asked = append(asked, r.URL.Path)
 		w.WriteHeader(answer)
 	}))
 	t.Cleanup(server.Close)
 	return Store{Address: strings.TrimPrefix(server.URL, "http://")}, &asked
 }
 func TestAnImageAndAnArchiveAreAskedForAtTheirOwnEndpoints(t *testing.T) {
 	// The two shapes the mesh records: a manifest by digest, and a blob by digest. They are
 	// different endpoints, and asking at the wrong one answers 404 — which this would then
 	// record as collected, leaving the bytes on disk for ever while the record says otherwise.
 	store, asked := fakeStore(t, http.StatusAccepted)
 	ctx := context.Background()
 	image := catalogue.ArtifactStoreScheme + "web/app@sha256:abc123"
 	archive := catalogue.ArtifactStoreScheme + "web/config/blobs/sha256:def456"
 	if err := store.LetGo(ctx, image); err != nil {
 		t.Fatal(err)
 	}
 	if err := store.LetGo(ctx, archive); err != nil {
 		t.Fatal(err)
 	}
 	want := []string{"/v2/web/app/manifests/sha256:abc123", "/v2/web/config/blobs/sha256:def456"}
 	if len(*asked) != 2 || (*asked)[0] != want[0] || (*asked)[1] != want[1] {
 		t.Fatalf("the store was asked %v; want %v", *asked, want)
 	}
 }
 func TestAStoreThatDoesNotHaveItAnswersGone(t *testing.T) {
 	// The outcome wanted, already true. Told apart from success only so the sweep can say which
 	// happened; both are recorded, because retrying for ever is the thing to avoid.
 	store, _ := fakeStore(t, http.StatusNotFound)
 	err := store.LetGo(context.Background(), catalogue.ArtifactStoreScheme+"web/app@sha256:abc123")
 	if !errors.Is(err, Gone) {
 		t.Fatalf("a store that does not hold it answered %v, want Gone", err)
 	}
 }
 func TestAStoreWithDeletionOffSaysSoAndNamesTheRemedy(t *testing.T) {
 	// The registry answers 405 when it was started without deletion enabled. The remedy is a
 	// setting on the store's module, and saying "405" would send somebody to the wrong place.
 	store, _ := fakeStore(t, http.StatusMethodNotAllowed)
 	err := store.LetGo(context.Background(), catalogue.ArtifactStoreScheme+"web/app@sha256:abc123")
 	if err == nil {
 		t.Fatal("a store that refuses deletion was read as success")
 	}
 	if !strings.Contains(err.Error(), "REGISTRY_STORAGE_DELETE_ENABLED") {
 		t.Fatalf("the refusal does not name the remedy: %v", err)
 	}
 }
 func TestAReferenceThatIsNotTheMeshsOwnIsNeverAsked(t *testing.T) {
 	// The whole safety of the sweep is that it names only what the mesh recorded putting there.
 	// A reference of another shape — a vendor's image, a package version — is refused rather
 	// than composed into a delete somewhere that is not the mesh's store.
 	store, asked := fakeStore(t, http.StatusAccepted)
 	for _, reference := range []string{
 		"docker.io/library/registry@sha256:abc123",
 		"registry@sha256:abc123",
 		"1.4.2",
 	} {
 		if err := store.LetGo(context.Background(), reference); err == nil {
 			t.Errorf("%s was asked about; it is not a reference into the mesh's store", reference)
 		}
 	}
 	if len(*asked) != 0 {
 		t.Fatalf("the store was asked about %v", *asked)
 	}
 }
@@ -1,7 +1,6 @@
 package broker
 import (
 	"context"
 	"crypto/sha256"
 	"crypto/tls"
 	"crypto/x509"
@@ -13,7 +12,6 @@ import (
 	"time"
 	"github.com/nats-io/nats.go"
 	"github.com/nats-io/nats.go/jetstream"
 )
 // The JetStream side of the controller: the one place the mesh's streams and consumers are
@@ -318,50 +316,3 @@ func retentionOf(r Retention) nats.RetentionPolicy {
 		return nats.LimitsPolicy
 	}
 }
 // EnsureBucket creates a module's bucket if it is absent and brings its options to match if it is
 // present (novox/hq ADR 0201).
 //
 // **An update, never a delete and recreate**, for the reason a stream is updated: recreating
 // discards what the bucket holds, and what a module's state holds is data. The mesh's caps are
 // asserted with the owner's options, so a bucket made by hand converges to them.
 func (j *JetStream) EnsureBucket(b Bucket) error {
 	history := b.History
 	if history == 0 {
 		history = 1
 	}
 	js, err := jetstream.New(j.conn)
 	if err != nil {
 		return err
 	}
 	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
 	defer cancel()
 	if _, err := js.CreateOrUpdateKeyValue(ctx, jetstream.KeyValueConfig{
 		Bucket:       b.Bucket(),
 		Description:  b.Why(),
 		History:      uint8(history),
 		TTL:          time.Duration(b.TTLSeconds) * time.Second,
 		MaxValueSize: StateMaxValueBytes,
 		MaxBytes:     StateMaxBytes,
 		Storage:      jetstream.FileStorage,
 	}); err != nil {
 		return fmt.Errorf("asserting bucket %s: %w", b.Bucket(), err)
 	}
 	return nil
 }
 // BucketNames is every key-value bucket on the server, the mesh's and anybody else's.
 func (j *JetStream) BucketNames() ([]string, error) {
 	js, err := jetstream.New(j.conn)
 	if err != nil {
 		return nil, err
 	}
 	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
 	defer cancel()
 	lister := js.KeyValueStoreNames(ctx)
 	var out []string
 	for name := range lister.Name() {
 		out = append(out, name)
 	}
 	return out, lister.Error()
 }
@@ -45,11 +45,6 @@ type Membership struct {
 	// module that must tell the mesh from the world, the route proxy serving an internal name, reads
 	// it here rather than keeping a definition of its own.
 	Mesh []string `json:"mesh,omitempty"`
 	// State is every bucket this module's code may reach, by the name it uses for each, and whether
 	// it may write it (novox/hq ADR 0201): the runtime answers a bundle's state verbs from this list
 	// and refuses, with the reason, what is not on it — the bus enforces only the union over every
 	// module on the machine.
 	State []StateIssued `json:"state,omitempty"`
 }
 // Served is one address a tool is answered on.
@@ -108,7 +103,6 @@ func MembershipFor(node string, d Declared, where Placements) Membership {
 			m.Seats = append(m.Seats, SeatServed{Seat: s.Name, Verb: verb, Subject: seatToolSubject(s, verb, node)})
 		}
 	}
 	m.State = stateIssuedFor(d)
 	if len(d.Invokes) > 0 {
 		m.Reaches = map[string][]string{}
 		for _, t := range d.Invokes {
@@ -103,12 +103,6 @@ type Principal struct {
 	// permission and nothing beside it.
 	Invokes []string
 	// State is the local names of the state this principal's module keeps, and Reads the state of
 	// others it reads as `<module>.<name>` (novox/hq ADR 0201): a bucket each, kept by the owner's
 	// instances and read by whoever declares it.
 	State []string
 	Reads []string
 	// PasswordHash is the bcrypt hash the mesh minted. The plaintext is sealed to the principal
 	// and never appears here: this file is written to a node's disk and read by a server, and a
 	// secret that can be read from a configuration file is a secret with a wider blast radius
@@ -427,10 +421,6 @@ func PermissionsFor(p Principal) (Permissions, error) {
 			}
 		}
 		// 5. Its state, and the state of others it reads (novox/hq ADR 0201): every one read and
 		//    watched, its own written too.
 		pub = append(pub, stateGrants(p.Module, p.State, p.Reads)...)
 	case KindNodeTools:
 		// **One process serves what every module on the machine would have served for itself**
 		// (novox/hq ADR 0175). Each carried module's whole tool namespace — the same grant that
@@ -497,13 +487,6 @@ func PermissionsFor(p Principal) (Permissions, error) {
 				"$JS.API.CONSUMER.MSG.NEXT."+stream+"."+durable,
 				"$JS.ACK."+stream+"."+durable+".>")
 		}
 		// **And it keeps and reads state for the modules it carries** (novox/hq ADR 0201): the union
 		// of what each may do with a bucket — an owner's write, a reader's read. That one module's code
 		// does not write another's bucket through it is the runtime's to keep, from the membership
 		// each assignment is issued, as it keeps each module's events under that module's own name.
 		for _, d := range p.Carries {
 			pub = append(pub, stateGrants(d.Module, stateNames(d.State), d.Reads)...)
 		}
 		sub = unique(sub)
 		pub = unique(pub)
 	}
@@ -1,169 +0,0 @@
 package broker
 import (
 	"fmt"
 	"sort"
 	"strings"
 )
 // A module's state on the bus (novox/hq ADR 0201, design 32 §4, design 25 §3).
 //
 // A module names the state it keeps (`state`) and the state of others it reads (`reads`), and each
 // is a key-value bucket: the server's own last-per-subject stream with direct reads, delete markers
 // and watches, which is the state relationship the mesh already uses for declarations, opened to
 // modules. The controller creates every bucket from the catalogue — from registration, like a
 // seat's stream, so a reader may watch before the owner runs anywhere — and no module can.
 //
 // Pure, like everything else in this package that decides what the bus holds; jetstream.go is the
 // part that asks a server.
 // The mesh's caps on a bucket, the same for every module: a value is a piece of state, not a file,
 // and a bucket that grew without bound would be one module filling the bus's disk for everyone.
 const (
 	StateMaxValueBytes = 256 * 1024
 	StateMaxBytes      = 64 * 1024 * 1024
 )
 // A Bucket is one module's declared state as the bus holds it.
 type Bucket struct {
 	Module string
 	Name   string
 	// History is how many values a key keeps; zero is one.
 	History int
 	// TTLSeconds is how long a value lives; zero is until replaced or deleted.
 	TTLSeconds int
 }
 // BucketName is the bucket a module's state lives in: the module and the local name joined by an
 // underscore, which neither may contain, so two modules can never derive one bucket.
 func BucketName(module, name string) string { return module + "_" + name }
 // Bucket is this bucket's name on the bus.
 func (b Bucket) Bucket() string { return BucketName(b.Module, b.Name) }
 // Why is carried into the server's description of the bucket, so somebody reading the server's
 // own state finds whose it is and why it is kept.
 func (b Bucket) Why() string {
 	return fmt.Sprintf("%s's state %q (novox/hq ADR 0201): its current value per key, written by %s, "+
 		"read by whatever declares it reads it; kept when %s is unassigned, because it is data",
 		b.Module, b.Name, b.Module, b.Module)
 }
 // bucketOfRead is the bucket a read names, `<module>.<name>`, or false when it names none.
 func bucketOfRead(read string) (string, bool) {
 	at := strings.LastIndex(read, ".")
 	if at <= 0 || at == len(read)-1 {
 		return "", false
 	}
 	module, name := read[:at], read[at+1:]
 	if !safeSubject.MatchString(module) || !safeSubject.MatchString(name) {
 		return "", false
 	}
 	return BucketName(module, name), true
 }
 // stateGrants is what a principal publishes to reach the state its modules keep and read: for every
 // bucket, binding to it, reading a key directly, and an ordered consumer for listing and watching,
 // created and deleted on the bucket's own stream, with its flow control answered; for a bucket an
 // owner keeps, writing under the bucket's own subjects too.
 //
 // **Measured against a running server, 2026-10-04** (novox/hq research 024), and each one is there
 // because leaving it out failed: without STREAM.INFO nothing binds; without DIRECT.GET nothing is
 // read; without CONSUMER.CREATE no key is listed and nothing is watched; without CONSUMER.DELETE a
 // watch cannot be stopped and lingers on the server. A write outside these is refused by the server
 // — and reaches the writer as a timeout, not a refusal, which is why the runtime refuses first.
 func stateGrants(module string, keeps []string, reads []string) []string {
 	var out []string
 	read := func(bucket string) {
 		stream := "KV_" + bucket
 		out = append(out,
 			"$JS.API.STREAM.INFO."+stream,
 			"$JS.API.DIRECT.GET."+stream+".>",
 			"$JS.API.CONSUMER.CREATE."+stream+".>",
 			"$JS.API.CONSUMER.DELETE."+stream+".>",
 			"$JS.FC."+stream+".>")
 	}
 	for _, name := range keeps {
 		if !safeSubject.MatchString(name) {
 			continue
 		}
 		bucket := BucketName(module, name)
 		read(bucket)
 		out = append(out, "$KV."+bucket+".>")
 	}
 	for _, r := range reads {
 		if bucket, ok := bucketOfRead(r); ok {
 			read(bucket)
 		}
 	}
 	return out
 }
 // StateIssued is one bucket an assignment may reach, by the name its module uses for it: its own
 // state by the local name, another's as `<module>.<name>` (novox/hq ADR 0201).
 type StateIssued struct {
 	Name   string `json:"name"`
 	Bucket string `json:"bucket"`
 	Writes bool   `json:"writes,omitempty"`
 }
 // stateIssuedFor is every bucket a module's code may reach, as its membership lists them.
 func stateIssuedFor(d Declared) []StateIssued {
 	var out []StateIssued
 	for _, b := range d.State {
 		out = append(out, StateIssued{Name: b.Name, Bucket: BucketName(d.Module, b.Name), Writes: true})
 	}
 	for _, r := range d.Reads {
 		if bucket, ok := bucketOfRead(r); ok {
 			out = append(out, StateIssued{Name: r, Bucket: bucket})
 		}
 	}
 	return out
 }
 // stateNames is the local names of a module's own buckets.
 func stateNames(buckets []Bucket) []string {
 	out := make([]string, 0, len(buckets))
 	for _, b := range buckets {
 		out = append(out, b.Name)
 	}
 	return out
 }
 // A BucketAsserter is the part of a JetStream connection bucket assertion needs.
 type BucketAsserter interface {
 	// EnsureBucket creates the bucket if absent and brings its options to match if present, never
 	// discarding what it holds.
 	EnsureBucket(b Bucket) error
 	// BucketNames is every key-value bucket on the server.
 	BucketNames() ([]string, error)
 }
 // RaiseBuckets asserts every declared bucket and answers the buckets on the server that nothing
 // declares any more.
 //
 // **Those are reported, never removed** (novox/hq ADR 0201, ADR 0030): what a module stored is
 // data, and a manifest edited, a module renamed or a catalogue entry dropped is an ordinary day's
 // work that must not take data with it. Removing one is a person's act.
 func RaiseBuckets(a BucketAsserter, buckets []Bucket) (undeclared []string, err error) {
 	sorted := append([]Bucket(nil), buckets...)
 	sort.Slice(sorted, func(i, j int) bool { return sorted[i].Bucket() < sorted[j].Bucket() })
 	declared := map[string]bool{}
 	for _, b := range sorted {
 		if err := a.EnsureBucket(b); err != nil {
 			return nil, fmt.Errorf("asserting %s's state %q: %w", b.Module, b.Name, err)
 		}
 		declared[b.Bucket()] = true
 	}
 	names, err := a.BucketNames()
 	if err != nil {
 		return nil, fmt.Errorf("listing the bus's state: %w", err)
 	}
 	for _, n := range names {
 		if !declared[n] {
 			undeclared = append(undeclared, n)
 		}
 	}
 	sort.Strings(undeclared)
 	return undeclared, nil
 }
@@ -1,166 +0,0 @@
 package broker
 import (
 	"slices"
 	"strings"
 	"testing"
 	"github.com/nats-io/nats.go"
 )
 // The grants measured against a running server (novox/hq research 024): an owner reads and writes
 // its bucket, a reader only reads, and neither reaches any other bucket.
 func TestAnOwnerWritesItsStateAndAReaderOnlyReads(t *testing.T) {
 	owner, err := PermissionsFor(Principal{Kind: KindModule, Node: "one", Module: "claude-code",
 		State: []string{"servers"}, PasswordHash: "x"})
 	if err != nil {
 		t.Fatal(err)
 	}
 	for _, s := range []string{
 		"$KV.claude-code_servers.>",
 		"$JS.API.STREAM.INFO.KV_claude-code_servers",
 		"$JS.API.DIRECT.GET.KV_claude-code_servers.>",
 		"$JS.API.CONSUMER.CREATE.KV_claude-code_servers.>",
 		"$JS.API.CONSUMER.DELETE.KV_claude-code_servers.>",
 		"$JS.FC.KV_claude-code_servers.>",
 	} {
 		has(t, owner.Publish, s)
 	}
 	hasNot(t, owner.Publish, "$KV.>")
 	hasNot(t, owner.Publish, "$JS.API.>")
 	reader, err := PermissionsFor(Principal{Kind: KindModule, Node: "one", Module: "console",
 		Reads: []string{"claude-code.servers"}, PasswordHash: "x"})
 	if err != nil {
 		t.Fatal(err)
 	}
 	has(t, reader.Publish, "$JS.API.DIRECT.GET.KV_claude-code_servers.>")
 	has(t, reader.Publish, "$JS.API.CONSUMER.CREATE.KV_claude-code_servers.>")
 	hasNot(t, reader.Publish, "$KV.claude-code_servers.>")
 	for _, s := range reader.Subscribe {
 		if s == "$KV.claude-code_servers.>" {
 			t.Fatalf("a reader subscribes the bucket's subjects directly: %v", reader.Subscribe)
 		}
 	}
 }
 // One runtime carries every module on its machine, so its grant is the union: the owner's write
 // where an owner is carried, a read where only a reader is.
 func TestTheRuntimeKeepsAndReadsStateForItsModules(t *testing.T) {
 	perms, err := PermissionsFor(Principal{Kind: KindNodeTools, Node: "one", Module: RuntimeModule,
 		Carries: []Declared{
 			{Module: "claude-code", State: []Bucket{{Module: "claude-code", Name: "servers"}},
 				Reads: []string{"licence-manager.bindings"}},
 			{Module: "audit"},
 		}, PasswordHash: "x"})
 	if err != nil {
 		t.Fatal(err)
 	}
 	has(t, perms.Publish, "$KV.claude-code_servers.>")
 	has(t, perms.Publish, "$JS.API.DIRECT.GET.KV_licence-manager_bindings.>")
 	hasNot(t, perms.Publish, "$KV.licence-manager_bindings.>")
 }
 // A module with no state is granted nothing of any bucket — the composition of every module that
 // existed before this is unchanged.
 func TestAModuleWithNoStateReachesNoBucket(t *testing.T) {
 	perms, err := PermissionsFor(Principal{Kind: KindModule, Node: "one", Module: "billing",
 		Emits: []string{"order.placed"}, PasswordHash: "x"})
 	if err != nil {
 		t.Fatal(err)
 	}
 	for _, s := range perms.Publish {
 		if strings.HasPrefix(s, "$KV.") || strings.HasPrefix(s, "$JS.FC.") || strings.Contains(s, ".KV_") {
 			t.Fatalf("granted %q without declaring state", s)
 		}
 	}
 }
 // A read that names no bucket grants nothing rather than something that happens to parse.
 func TestAReadThatNamesNoBucketGrantsNothing(t *testing.T) {
 	if got := stateGrants("a", nil, []string{"nodot", "x.", ".y", "a.b>"}); len(got) != 0 {
 		t.Fatalf("granted %v for reads that name no bucket", got)
 	}
 }
 // The membership lists every bucket the module's code may reach, by the name the module uses for
 // it, and whether it may write it — the list the runtime refuses from.
 func TestAMembershipListsTheStateItsModuleMayReach(t *testing.T) {
 	m := MembershipFor("one", Declared{Module: "claude-code",
 		State: []Bucket{{Module: "claude-code", Name: "servers"}},
 		Reads: []string{"licence-manager.bindings"}}, Placements{})
 	want := []StateIssued{
 		{Name: "servers", Bucket: "claude-code_servers", Writes: true},
 		{Name: "licence-manager.bindings", Bucket: "licence-manager_bindings"},
 	}
 	if !slices.Equal(m.State, want) {
 		t.Fatalf("issued %+v, want %+v", m.State, want)
 	}
 	if none := MembershipFor("one", Declared{Module: "audit"}, Placements{}); none.State != nil {
 		t.Fatalf("a module with no state was issued %+v", none.State)
 	}
 }
 type buckets struct {
 	ensured []string
 	on      []string
 }
 func (b *buckets) EnsureBucket(x Bucket) error {
 	b.ensured = append(b.ensured, x.Bucket())
 	return nil
 }
 func (b *buckets) BucketNames() ([]string, error) { return b.on, nil }
 // Every declared bucket is asserted; one on the server that nothing declares is said, not removed.
 func TestRaisingStateReportsWhatNothingDeclares(t *testing.T) {
 	b := &buckets{on: []string{"claude-code_servers", "gone_old", "ours_by_hand"}}
 	undeclared, err := RaiseBuckets(b, []Bucket{{Module: "claude-code", Name: "servers"}, {Module: "a", Name: "b"}})
 	if err != nil {
 		t.Fatal(err)
 	}
 	if !slices.Equal(b.ensured, []string{"a_b", "claude-code_servers"}) {
 		t.Fatalf("asserted %v", b.ensured)
 	}
 	if !slices.Equal(undeclared, []string{"gone_old", "ours_by_hand"}) {
 		t.Fatalf("reported %v", undeclared)
 	}
 }
 // Against a real server: a bucket is created with the owner's options and the mesh's caps,
 // asserting it again changes nothing and keeps what it holds, and a changed option is brought to
 // match in place.
 func TestABucketIsAssertedInPlace(t *testing.T) {
 	js := aLiveBus(t)
 	b := Bucket{Module: "statetest", Name: "servers"}
 	if _, err := RaiseBuckets(js, []Bucket{b}); err != nil {
 		t.Fatalf("a real server refused a module's bucket: %v", err)
 	}
 	kv, err := js.Context().KeyValue(b.Bucket())
 	if err != nil {
 		t.Fatal(err)
 	}
 	if _, err := kv.Put("all.one", []byte(`{"kept":true}`)); err != nil {
 		t.Fatal(err)
 	}
 	b.History = 3
 	if _, err := RaiseBuckets(js, []Bucket{b}); err != nil {
 		t.Fatalf("asserting the bucket again failed, so a restart would: %v", err)
 	}
 	got, err := kv.Get("all.one")
 	if err != nil || string(got.Value()) != `{"kept":true}` {
 		t.Fatalf("asserting again lost what the bucket held: %v %v", got, err)
 	}
 	status, err := kv.Status()
 	if err != nil {
 		t.Fatal(err)
 	}
 	if status.History() != 3 {
 		t.Fatalf("history is %d, the owner declared 3", status.History())
 	}
 	if s, ok := status.(*nats.KeyValueBucketStatus); ok {
 		if c := s.StreamInfo().Config; c.MaxMsgSize != StateMaxValueBytes || c.MaxBytes != StateMaxBytes {
 			t.Fatalf("the mesh's caps are not on the bucket: value %d, bucket %d", c.MaxMsgSize, c.MaxBytes)
 		}
 	}
 }
@@ -33,10 +33,6 @@ type Declared struct {
 	Watches []Seat
 	// Invokes are the tools it calls, `<module>.<tool>` or `*` (novox/hq ADR 0152).
 	Invokes []string
 	// State is the state it keeps, each a bucket its instances write (novox/hq ADR 0201).
 	State []Bucket
 	// Reads are other modules' state it reads, each `<module>.<name>` (novox/hq ADR 0201).
 	Reads []string
 }
 // Records is what composing a user list needs to know about the mesh, and nothing more.
@@ -85,7 +81,6 @@ func Users(r Records) ([]Principal, error) {
 				Kind: KindModule, Node: node, Module: d.Module,
 				Emits: d.Emits, Consumes: d.Consumes, Serves: d.Serves,
 				Holds: d.Holds, Uses: d.Uses, Watches: d.Watches, Invokes: d.Invokes,
 				State: stateNames(d.State), Reads: d.Reads,
 			})
 		}
 		if runtimeHere {
@@ -215,7 +215,7 @@ func Build(ctx context.Context, run Runner, publish Publisher,
 		sort.Slice(artifacts, func(i, j int) bool { return artifacts[i].Name < artifacts[j].Name })
 		for _, a := range artifacts {
 			say("artifact", "%s (%s%s) — starting", a.Name, a.Kind, langSuffix(a))
-			made, err := one(ctx, run, publish, manifest.Module, within, workspace, commit, credentials, a, args, held, npmrcPath, npmrc, seatBases, say)
+			made, err := one(ctx, run, publish, manifest.Module, within, workspace, commit, credentials, a, args, held, npmrcPath, seatBases, say)
 			if err != nil {
 				say("artifact", "%s FAILED: %v", a.Name, err)
 				return Result{}, err
@@ -443,7 +443,7 @@ func wantsPackages(manifest catalogue.Manifest, within string) bool {
 func one(ctx context.Context, run Runner, publish Publisher,
 	module, tree, workspace, commit, credentials string, a catalogue.Artifact, args []string,
-	held map[string]string, npmrc string, registry Npmrc, seats map[string]string,
+	held map[string]string, npmrc string, seats map[string]string,
 	say func(step, format string, args ...any)) (catalogue.Built, error) {
 	switch a.Kind {
@@ -582,11 +582,6 @@ func one(ctx context.Context, run Runner, publish Publisher,
 					"holds no copy of it. Build %s first",
 				module, a.Name, chain.Language, chain.Base, chain.Artifact, chain.Base)
 		}
 		// The module's own packages first, where the compiler and the bundler resolve them from
 		// (dependencies.go); nothing at all for a module whose package.json names only the SDK.
 		if err := installOwn(ctx, run, tree, chain, base, registry, say); err != nil {
 			return catalogue.Built{}, fmt.Errorf("%s: %s: %w", module, a.Name, err)
 		}
 		say("bundle", "compiling %s in %s's toolchain", a.Language, chain.Base)
 		compiled, err := compile(ctx, run, tree, chain, base, a)
 		if err != nil {
@@ -1,147 +0,0 @@
 package builder
 import (
 	"context"
 	"encoding/json"
 	"errors"
 	"fmt"
 	"os"
 	"path/filepath"
 	"sort"
 	"strings"
 )
 // A module's own packages, installed before its bundle is compiled, so the bundler inlines them.
 //
 // **A bundle could only import what the toolchain happened to carry.** The compiler and the bundler
 // resolve an import by walking up from the module's source: the module's own directory first, then
 // the toolchain image's node_modules. Nothing ever put anything in the first, so a module needing a
 // database driver (`pg`, `mongodb`, `mssql`) could not be a bundle at all, and kept a container whose
 // recipe installed it by hand (novox/hq ADR 0198 §4: "the backend's own driver inside the bundle").
 // Now the module's `package.json` says what it depends on, as any Node package does, and the build
 // installs exactly that into the module's own directory before compiling.
 //
 // **The SDK the toolchain carries is the one a bundle is built with, whatever the module says**
 // (novox/hq issue 212: the toolchain is rebuilt on every SDK release and every bundle after it). A
 // module's `package.json` names `@novox/mesh-sdk` with a range — it has to, to type-check on a
 // workstation — and installing that range would shadow the toolchain's copy for this module alone:
 // one module compiled against an older SDK than its neighbours, chosen by a caret nobody re-reads.
 // So the SDK is taken out of what is installed (and never fetched), and any copy something else
 // pulls in is removed afterwards; every import of it resolves past the module's node_modules to the
 // toolchain's. A module therefore cannot pin a different SDK, by design: the toolchain is the pin.
 //
 // **Correctness before speed.** Every build installs afresh into a fresh clone, from the lockfile
 // when the module has one (`npm ci`, exact) and from its ranges otherwise; nothing installed is kept
 // between builds. What is shared is npm's own download cache, a named volume, which is
 // content-addressed and verified by integrity on every read — it saves the network, never the
 // install. Install scripts do not run: the build node runs nobody's postinstall, and what a script
 // would build natively could not be inlined into one file anyway.
 // sdkPackage is the package a TypeScript bundle's launcher serves through, and the one package a
 // module's own dependencies never supply (above).
 const sdkPackage = "@novox/mesh-sdk"
 // npmCache is the named volume npm's download cache lives in across builds on one build node.
 const npmCache = "mesh-builder-npm-cache"
 // ownDependencies is what a module's package.json depends on beyond the SDK, sorted; nothing when
 // the module has no package.json or depends on nothing else — which builds exactly as before.
 func ownDependencies(tree string) ([]string, error) {
 	raw, err := os.ReadFile(filepath.Join(tree, "package.json"))
 	if errors.Is(err, os.ErrNotExist) {
 		return nil, nil
 	}
 	if err != nil {
 		return nil, err
 	}
 	var p struct {
 		Dependencies map[string]string `json:"dependencies"`
 	}
 	if err := json.Unmarshal(raw, &p); err != nil {
 		return nil, fmt.Errorf("the module's package.json is not JSON: %w", err)
 	}
 	var names []string
 	for name := range p.Dependencies {
 		if name != sdkPackage {
 			names = append(names, name)
 		}
 	}
 	sort.Strings(names)
 	return names, nil
 }
 // installSteps is the script run inside the toolchain image, from the module's own directory ($0).
 // It works in a scratch copy so the module's package.json and lockfile are never rewritten, takes
 // the SDK out of what is installed, installs production dependencies only, removes any copy of the
 // SDK something pulled in, and puts the result at the module's node_modules.
 const installSteps = `set -e
 work="$(mktemp -d)"
 cp "$0/package.json" "$work/"
 if [ -f "$0/package-lock.json" ]; then cp "$0/package-lock.json" "$work/"; fi
 cd "$work"
 node -e '
 const fs = require("fs"), sdk = process.argv[1];
 const p = JSON.parse(fs.readFileSync("package.json", "utf8"));
 for (const k of ["dependencies", "peerDependencies", "optionalDependencies"]) if (p[k]) delete p[k][sdk];
 delete p.devDependencies; delete p.scripts;
 fs.writeFileSync("package.json", JSON.stringify(p));
 ' "$1"
 shift
 if [ -f package-lock.json ]; then
  npm ci --omit=dev --omit=peer --ignore-scripts --no-audit --no-fund "$@"
 else
  npm install --omit=dev --omit=peer --ignore-scripts --no-audit --no-fund --no-package-lock "$@"
 fi
 find node_modules -depth -type d -path "*/node_modules/@novox/mesh-sdk" -exec rm -rf {} +
 rm -rf "$0/node_modules"
 cp -a node_modules "$0/node_modules"
 `
 // installOwn installs a TypeScript module's own production dependencies into its directory, in the
 // toolchain image, before the compile — or does nothing at all for a module that has none.
 func installOwn(ctx context.Context, run Runner, tree string, chain Toolchain, base string,
 	registry Npmrc, say func(step, format string, args ...any)) error {
 	if chain.Language != "typescript" {
 		return nil
 	}
 	deps, err := ownDependencies(tree)
 	if err != nil || len(deps) == 0 {
 		return err
 	}
 	scoped := strings.TrimSpace(registry.Scope)
 	if !registry.Enabled() {
 		// **No registry, no scoped package.** Without the mesh's registry a scoped name resolves on
 		// the public one, where anybody may have published it: a dependency that installs is not
 		// the dependency the module meant.
 		for _, d := range deps {
 			if strings.HasPrefix(d, "@novox/") {
 				return fmt.Errorf("the module depends on %s, and this build knows no package registry "+
 					"for its scope; it would resolve from the public registry, which is not where the "+
 					"mesh publishes it", d)
 			}
 		}
 	}
 	const within = "/app/modules/module"
 	invocation := []string{"run", "--rm",
 		"--volume", tree + ":" + within,
 		"--volume", npmCache + ":/root/.npm",
 		"--workdir", within}
 	var flags []string
 	if registry.Enabled() {
 		// The registry is reached where the binding says it is, which may be this machine's own
 		// loopback — the reason an image build that resolves packages runs on the host network too.
 		invocation = append(invocation, "--network", "host")
 		reg := strings.TrimSpace(registry.Registry)
 		if !strings.HasSuffix(reg, "/") {
 			reg += "/"
 		}
 		flags = append(flags, "--"+scoped+":registry="+reg)
 	}
 	invocation = append(invocation, base, "sh", "-c", installSteps, within, sdkPackage)
 	invocation = append(invocation, flags...)
 	say("bundle", "installing the module's own packages: %s", strings.Join(deps, ", "))
 	if _, err := run(ctx, tree, "docker", invocation...); err != nil {
 		return fmt.Errorf("installing the module's own packages (%s): %w", strings.Join(deps, ", "), err)
 	}
 	return nil
 }
@@ -1,131 +0,0 @@
 package builder
 import (
 	"context"
 	"strings"
 	"testing"
 )
 // A module's own packages (dependencies.go): installed into its own directory, in the toolchain,
 // before the compile, so the bundler inlines them — the SDK always the toolchain's.
 func buildWithPackageJSON(t *testing.T, pkg string, extra map[string]string, registry Npmrc) (*recorded, error) {
 	t.Helper()
 	files := map[string]string{"index.ts": "console.log(1)"}
 	if pkg != "" {
 		files["package.json"] = pkg
 	}
 	for k, v := range extra {
 		files[k] = v
 	}
 	r, workspace := aRepository(t, aBundle, files)
 	held := map[string]string{"mesh-tools/build": "registry.invalid/mesh-tools/build@sha256:" + strings.Repeat("b", 64)}
 	_, err := Build(context.Background(), compiling{r}.run, r,
 		"https://forge.invalid/greeter.git", "", "", workspace, held, registry, GitCredential{}, nil)
 	return r, err
 }
 func installs(r *recorded) []string {
 	var out []string
 	for _, line := range r.ran {
 		if strings.HasPrefix(line, "docker run") && strings.Contains(line, "npm ci") {
 			out = append(out, line)
 		}
 	}
 	return out
 }
 func compileIndex(r *recorded) int {
 	for i, line := range r.ran {
 		if strings.Contains(line, "--outDir") {
 			return i
 		}
 	}
 	return -1
 }
 func TestAModulesOwnPackagesAreInstalledInTheToolchainBeforeTheCompile(t *testing.T) {
 	r, err := buildWithPackageJSON(t, `{"type":"module","dependencies":{"@novox/mesh-sdk":"^0.1.0","pg":"^8"},"devDependencies":{"typescript":"^5"}}`,
 		nil, Npmrc{Scope: "@novox", Registry: "https://forge.invalid/api/packages/novox/npm"})
 	if err != nil {
 		t.Fatal(err)
 	}
 	got := installs(r)
 	if len(got) != 1 {
 		t.Fatalf("want one install of the module's own packages:\n%s", strings.Join(r.ran, "\n"))
 	}
 	line := got[0]
 	for _, want := range []string{
 		"mesh-tools/build@sha256:",       // in the toolchain image
 		":/app/modules/module",           // into the module's own directory
 		"--workdir /app/modules/module",  //
 		npmCache + ":/root/.npm",         // npm's verified download cache, and only that
 		"--omit=dev", "--ignore-scripts", // production packages, no build-node scripts
 		"npm ci", "npm install", "--no-package-lock", // the lockfile when there is one, else the ranges
 		"--@novox:registry=https://forge.invalid/api/packages/novox/npm/", // the scope from the mesh's registry
 		"--network host",
 		"@novox/mesh-sdk", // named, to be taken out of what is installed
 	} {
 		if !strings.Contains(line, want) {
 			t.Errorf("the install lacks %q:\n%s", want, line)
 		}
 	}
 	// The SDK is the toolchain's: never installed from the module's range, and any copy removed.
 	if !strings.Contains(line, `delete p[k][sdk]`) || !strings.Contains(line, `-path "*/node_modules/@novox/mesh-sdk" -exec rm -rf`) {
 		t.Errorf("the module's own SDK range could shadow the toolchain's SDK:\n%s", line)
 	}
 	if i, c := strings.Index(strings.Join(r.ran, "\n"), "npm ci"), compileIndex(r); c < 0 ||
 		i > strings.Index(strings.Join(r.ran, "\n"), "--outDir") {
 		t.Fatalf("the install did not run before the compile:\n%s", strings.Join(r.ran, "\n"))
 	}
 }
 // **A module with nothing beyond the SDK builds exactly as before**: the same commands, no install.
 func TestAModuleDependingOnlyOnTheSDKBuildsExactlyAsBefore(t *testing.T) {
 	without, err := buildWithPackageJSON(t, "", nil, Npmrc{})
 	if err != nil {
 		t.Fatal(err)
 	}
 	for _, pkg := range []string{
 		`{"type":"module","dependencies":{"@novox/mesh-sdk":"^0.1.0"},"devDependencies":{"typescript":"^5"}}`,
 		`{"type":"module"}`,
 	} {
 		with, err := buildWithPackageJSON(t, pkg, map[string]string{"package-lock.json": "{}"}, Npmrc{Scope: "@novox", Registry: "https://forge.invalid/npm/"})
 		if err != nil {
 			t.Fatal(err)
 		}
 		if strings.Contains(strings.Join(with.ran, "\n"), "npm ") {
 			t.Fatalf("a module depending on nothing but the SDK ran npm:\n%s", strings.Join(with.ran, "\n"))
 		}
 		if len(with.ran) != len(without.ran) {
 			t.Fatalf("a module depending only on the SDK built differently from one with no package.json:\n%s\n---\n%s",
 				strings.Join(with.ran, "\n"), strings.Join(without.ran, "\n"))
 		}
 	}
 }
 // Without the mesh's registry a scoped package would resolve on the public one: refused by name.
 func TestAScopedPackageWithNoRegistryIsRefused(t *testing.T) {
 	r, err := buildWithPackageJSON(t, `{"dependencies":{"@novox/mesh-sdk":"^0.1.0","@novox/other":"^1"}}`, nil, Npmrc{})
 	if err == nil || !strings.Contains(err.Error(), "@novox/other") {
 		t.Fatalf("a scoped package was installed with no registry for its scope: %v", err)
 	}
 	if strings.Contains(strings.Join(r.ran, "\n"), "--outDir") {
 		t.Fatal("the compile ran after the refusal")
 	}
 	// A public package installs without one, from the public registry and nothing else.
 	r, err = buildWithPackageJSON(t, `{"dependencies":{"mssql":"^11"}}`, nil, Npmrc{})
 	if err != nil {
 		t.Fatal(err)
 	}
 	if got := installs(r); len(got) != 1 || strings.Contains(got[0], ":registry=") || strings.Contains(got[0], "--network host") {
 		t.Fatalf("a public package's install: %v", got)
 	}
 }
 func TestAnUnreadablePackageJSONIsRefusedByName(t *testing.T) {
 	_, err := buildWithPackageJSON(t, `{"dependencies":`, nil, Npmrc{})
 	if err == nil || !strings.Contains(err.Error(), "package.json") {
 		t.Fatalf("a broken package.json was not refused by name: %v", err)
 	}
 }
@@ -67,9 +67,8 @@ type Toolchain struct {
 	// `package.json` saying `"type": "module"` — Node reads a bare `.js` as CommonJS otherwise, so a
 	// bundle with its dependencies and without that line still fails to start — and the pruned,
 	// production-only node_modules the runtime itself ships with: the SDK's and the runtime's
-	// dependencies, and nothing module-specific (a module's own npm dependencies are installed into
+	// dependencies, and nothing module-specific yet (novox/hq ADR 0188 §5: a skeleton; a module's
-	// its own directory before the compile and inlined by the bundler: dependencies.go). Empty for a
+	// own npm dependencies are a later step). Empty for a language whose bundle carries its own —
 	// language whose bundle carries its own —
 	// a Go binary is static, a Python bundle is installed with its dependencies.
 	//
 	// A toolchain image without the directory fails the build by name rather than packing a bundle
@@ -46,7 +46,7 @@ func boundUsed(content string) [][2]string {
 // Three facts the mesh states about any provision, plus whatever the provider said it serves. A
 // module may not reach a binding it does not have — the same boundary as a secret, for the same
 // reason.
-func knownFor(m Manifest, needs []Needed, node string) (map[string]map[string]string, error) {
+func knownFor(m Manifest, needs []Needed, node string) map[string]map[string]string {
 	out := map[string]map[string]string{}
 	for _, want := range m.Wants() {
 		for i := range needs {
@@ -54,20 +54,12 @@ func knownFor(m Manifest, needs []Needed, node string) (map[string]map[string]st
 			if n.Name != want || n.For != m.Module {
 				continue
 			}
 			as := ConsumerIdentity(node, IdentitySource(m.Slug, m.Module))
 			values := map[string]string{
 				"at":   n.At,
 				"from": n.From,
-				"as":   as,
+				"as":   ConsumerIdentity(node, IdentitySource(m.Slug, m.Module)),
 			}
-			// What the provider derives for this consumer rather than for all of them
+			for key, value := range n.Serves {
 			// (novox/hq ADR 0201). Filled here, the one place a provision and the module
 			// requiring it are both in hand.
 			served, err := ServedTo(n.Serves, as)
 			if err != nil {
 				return nil, fmt.Errorf("%s requires %s: %w", m.Module, want, err)
 			}
 			for key, value := range served {
 				// The provider's own vocabulary. Rendered plainly: a port is 5432, not 5432.000000,
 				// which is what a float would write and what a connection string would refuse.
 				values[key] = plainly(value)
@@ -75,7 +67,7 @@ func knownFor(m Manifest, needs []Needed, node string) (map[string]map[string]st
 			out[want] = values
 		}
 	}
-	return out, nil
+	return out
 }
 // withOwnNames adds a module's own composed names to what it may name from one binding:
@@ -1,311 +0,0 @@
 package catalogue
 import (
 	"fmt"
 	"regexp"
 	"sort"
 	"strings"
 )
 // What a provider derives for one consumer, said once in the provider's definition and delivered
 // to both ends (novox/hq ADR 0201, issue 124).
 //
 // A `serves` block is otherwise literal: the same values for every consumer. Where the provider
 // *names the resource* — a bucket, a database, a vhost — the name is derived from who is asking,
 // and before this the mesh had no channel for it. The provider recomputed it in its own code and
 // every consumer transcribed it into its own definition by hand, which is a copy of somebody
 // else's rule kept in agreement by nobody. One of three transcriptions was wrong for months.
 //
 // **The mesh learns no protocol here; it spells its own name in an alphabet it already knows.**
 // The only fact a served value may name is the identity the mesh itself minted for the consumer,
 // in one of two alphabets: as it was minted, and as a DNS label. Everything a provider wants
 // around it — a prefix, a suffix, a separator — it writes around the placeholder, because a
 // served value is a string.
 // consumerFact is `${consumer:<fact>}` or `${consumer:<fact>:<alphabet>}`.
 var consumerFact = regexp.MustCompile(`\$\{consumer:([a-z][a-z0-9-]*)(?::([a-z][a-z0-9-]*))?\}`)
 // consumerFacts are what a served value may name about the consumer it is being derived for.
 // One entry, deliberately: the identity is the one thing about a consumer the mesh itself chose,
 // so it is the one thing the mesh can hand to a provider without either end guessing.
 var consumerFacts = []string{"as"}
 // consumerAlphabets are the ways the mesh will write that identity. `dns` is the mesh's own
 // identifier with its separator written `-` instead of `_` — the whole of the difference between
 // the alphabet the mesh mints in and the one buckets, vhosts and hostnames accept.
 var consumerAlphabets = []string{"dns"}
 // ServedTo fills a provider's served values for one consumer.
 //
 // `as` is the identity the mesh minted for that consumer — the same string it is told to present
 // as a login. Values with no placeholder are returned exactly as they were, and a block with no
 // placeholder at all is returned unchanged, so this costs nothing for the providers that derive
 // nothing.
 //
 // Only strings carry placeholders. A number, a boolean or a nested object is a value the provider
 // stated outright, and is left alone.
 func ServedTo(serves map[string]any, as string) (map[string]any, error) {
 	if len(serves) == 0 {
 		return serves, nil
 	}
 	var out map[string]any
 	for _, key := range sortedAnyKeys(serves) {
 		text, ok := serves[key].(string)
 		if !ok || !strings.Contains(text, "${consumer:") {
 			continue
 		}
 		filled, err := consumerInto(text, as)
 		if err != nil {
 			return nil, fmt.Errorf("the value served as %q: %w", key, err)
 		}
 		if out == nil {
 			// Copied only once something actually changes: the caller's map is the manifest's,
 			// and a provider that derives nothing must not have it rewritten underneath it.
 			out = make(map[string]any, len(serves))
 			for k, v := range serves {
 				out[k] = v
 			}
 		}
 		out[key] = filled
 	}
 	if out == nil {
 		return serves, nil
 	}
 	return out, nil
 }
 // consumerInto replaces every `${consumer:…}` in one value.
 //
 // **A fact or an alphabet the mesh does not have is refused, not left standing.** Written through,
 // the literal `${consumer:as}` would reach a configuration file and be read as a bucket name,
 // failing somewhere that names neither the module nor the mesh — the same reasoning `${bound:…}`
 // is refused by (boundInto).
 func consumerInto(value, as string) (string, error) {
 	var failed error
 	out := consumerFact.ReplaceAllStringFunc(value, func(match string) string {
 		parts := consumerFact.FindStringSubmatch(match)
 		fact, alphabet := parts[1], parts[2]
 		if fact != "as" {
 			if failed == nil {
 				failed = fmt.Errorf(
 					"says %s, and the mesh states %s about a consumer", match, orNothing(consumerFacts))
 			}
 			return match
 		}
 		switch alphabet {
 		case "":
 			return as
 		case "dns":
 			return asDNSLabel(as)
 		default:
 			if failed == nil {
 				failed = fmt.Errorf(
 					"says %s, and the mesh writes an identity as %s", match, orNothing(consumerAlphabets))
 			}
 			return match
 		}
 	})
 	if failed != nil {
 		return "", failed
 	}
 	return out, nil
 }
 // asDNSLabel writes a minted identity as a DNS label.
 //
 // The mesh's identities are already lower-case letters, digits and `_` (ConsumerIdentity), and
 // already short enough for the tightest backend they reach (CheckIdentity, twenty characters). So
 // this is the separator and nothing else — no lower-casing of what is already lower case, no
 // truncation to a limit the identity is already inside, no padding of a name that is already long
 // enough. Each of those would be the mesh guessing at a rule it has not been given.
 func asDNSLabel(as string) string {
 	return strings.ReplaceAll(as, "_", "-")
 }
 // CheckServes refuses a `serves` block that names a consumer fact or an alphabet the mesh does not
 // have, when the definition is parsed rather than when a consumer is resolved.
 //
 // A provision nobody consumes yet still has its rule read: a definition that would be refused the
 // first time somebody required it is a definition that is wrong now.
 func CheckServes(m Manifest) []string {
 	var problems []string
 	for _, provision := range sortedServes(m.Serves) {
 		for _, key := range sortedAnyKeys(m.Serves[provision]) {
 			text, ok := m.Serves[provision][key].(string)
 			if !ok {
 				continue
 			}
 			// A probe identity, because what is checked is the shape of the statement and not
 			// what any consumer is called.
 			if _, err := consumerInto(text, "mesh_node_module"); err != nil {
 				problems = append(problems, fmt.Sprintf(
 					"%s serves %s, and the value it serves as %q %s", m.Module, provision, key, err))
 			}
 		}
 	}
 	return problems
 }
 func sortedServes(serves map[string]map[string]any) []string {
 	out := make([]string, 0, len(serves))
 	for k := range serves {
 		out = append(out, k)
 	}
 	sort.Strings(out)
 	return out
 }
 func sortedAnyKeys(values map[string]any) []string {
 	out := make([]string, 0, len(values))
 	for k := range values {
 		out = append(out, k)
 	}
 	sort.Strings(out)
 	return out
 }
 // derivedFor is what the provider on this machine derives for one consumer of one provision
 // (novox/hq ADR 0201).
 //
 // Settled first, then derived: an operator may set a prefix on what the provider serves and the
 // mesh still fills the consumer's half of it ([ADR 0174]). Only the keys that actually name the
 // consumer are returned — the rest of a `serves` block is the same for every consumer and is
 // already in the provider's own definition, so repeating it here would be a second copy to go
 // stale.
 //
 // The first module in the resolved order that says it serves the provision answers, which is the
 // choice servedOnThisMachine makes for the consumer's half. Nothing serving it on this machine is
 // not an error: a contribution can reach a machine whose provider is a record or an adapter, and
 // then there is nothing derived to tell.
 func (r Resolution) derivedFor(provision, as, consumer, local string, settings SettingsBy) (map[string]any, error) {
 	for _, m := range r.Modules {
 		serves, said := m.Serves[provision]
 		if !said {
 			continue
 		}
 		var names map[string]any
 		for key, value := range serves {
 			if text, ok := value.(string); ok && strings.Contains(text, "${consumer:") {
 				if names == nil {
 					names = map[string]any{}
 				}
 				names[key] = value
 			}
 		}
 		if names == nil {
 			return nil, nil
 		}
 		// **A consumer that keeps several holders of this provision is refused** — this is issue
 		// 124's own failure one case to the side, and it would be just as quiet.
 		//
 		// Each holder gets its own login, `…_<local>` (ADR 0094), and a provider derives from the
 		// login, so it would make one resource per holder. The consumer's side has no such
 		// dimension: one binding file per provision, one `${bound:<provision>:<key>}`, both
 		// derived from the un-suffixed identity. So the provider would create the holder's
 		// resource and the consumer would be configured against a name nothing made — it would
 		// authenticate successfully and be refused on every object, which reads like a credential
 		// fault and is not one.
 		//
 		// Lifting this means giving the consumer's side a local dimension. That is a decision,
 		// not an omission, and until it is taken the mesh says so rather than guessing.
 		if local != "" {
 			return nil, fmt.Errorf(
 				"%s keeps several holders of %s (this one is %q), and %s derives %s for each "+
 					"consumer from the login the mesh minted. Each holder has its own login, and a "+
 					"consumer is told one value per requirement — so the two ends would name "+
 					"different things and nothing would compare them (novox/hq ADR 0201)",
 				consumer, local, provision, m.Module, orNothing(sortedAnyKeys(names)))
 		}
 		settled, err := Settle(names, settings[m.Module])
 		if err != nil {
 			return nil, fmt.Errorf("%s serving %s: %w", m.Module, provision, err)
 		}
 		derived, err := ServedTo(settled, as)
 		if err != nil {
 			return nil, fmt.Errorf("%s serving %s to %s: %w", m.Module, provision, as, err)
 		}
 		return derived, nil
 	}
 	return nil, nil
 }
 // notTranscribed refuses a consumer's file that writes out the value its provider derives for it,
 // instead of asking for it (novox/hq ADR 0201, issue 124).
 //
 // **What would have caught the one wrong instance.** The object store's three consumers each wrote
 // their bucket into their own configuration by hand. One of them named a predecessor's bucket, and
 // nothing compared it to what the provider would actually create: the module would have
 // authenticated successfully and been refused on every object, which reads like a credential fault
 // and is not one. It looked authoritative for months.
 //
 // The test is exact and costs one string search: a definition whose file already contains the
 // value the mesh is about to derive for it has written down somebody else's rule. It cannot be a
 // coincidence — a derived value carries the identity the mesh minted for this very consumer on
 // this very machine, which nothing else would spell out — and it cannot be checked afterwards,
 // because after substitution every consumer's file contains it legitimately.
 //
 // Only values that actually name the consumer are judged. A provider that serves a constant under
 // the same key serves the same constant to everyone, and a consumer repeating it is redundant
 // rather than wrong.
 func notTranscribed(resource map[string]any, known map[string]map[string]string, module string) error {
 	if fmt.Sprint(resource["type"]) != "file" {
 		return nil
 	}
 	content, ok := resource["content"].(string)
 	if !ok || content == "" {
 		return nil
 	}
 	for _, provision := range sortedKnown(known) {
 		values := known[provision]
 		identity := values["as"]
 		if identity == "" {
 			continue
 		}
 		for _, key := range sortedStringKeys(values) {
 			if key == "as" {
 				// The login is not derived from itself, and a consumer that must present it in a
 				// connection string legitimately has it from `${bound:…}` — which is what it will
 				// be after substitution, so this would judge the substitution, not the module.
 				continue
 			}
 			value := values[key]
 			if value == "" || !namesTheConsumer(value, identity) {
 				continue
 			}
 			if !strings.Contains(content, value) {
 				continue
 			}
 			return fmt.Errorf(
 				"%s writes %q into %v, and that is exactly what %s derives for it — a definition "+
 					"keeping its own copy of somebody else's naming rule is one that can disagree "+
 					"with it, silently. Say ${bound:%s:%s} and be told",
 				module, value, resource["id"], provision, provision, key)
 		}
 	}
 	return nil
 }
 // namesTheConsumer is whether a derived value was built from this consumer's identity — in the
 // alphabet it was minted in, or as a DNS label. A value that does not contain it was not derived
 // from it, whatever else it may be.
 func namesTheConsumer(value, identity string) bool {
 	return strings.Contains(value, identity) || strings.Contains(value, asDNSLabel(identity))
 }
 func sortedKnown(known map[string]map[string]string) []string {
 	out := make([]string, 0, len(known))
 	for k := range known {
 		out = append(out, k)
 	}
 	sort.Strings(out)
 	return out
 }
 func sortedStringKeys(values map[string]string) []string {
 	out := make([]string, 0, len(values))
 	for k := range values {
 		out = append(out, k)
 	}
 	sort.Strings(out)
 	return out
 }
@@ -645,16 +645,7 @@ func (r Resolution) compose(with Rendering, owner map[string]string,
 			if err != nil {
 				return nil, err
 			}
-			as := ConsumerIdentity(r.Node, IdentitySource(m.Slug, m.Module))
+			file, err := boundFile(*found, m.Binds[to], ConsumerIdentity(r.Node, IdentitySource(m.Slug, m.Module)), own)
 			// What the provider derives for THIS consumer, filled here where the consumer is
 			// known (novox/hq ADR 0201). The same fill knownFor does below, so the binding file
 			// and the module's `${bound:…}` substitutions cannot say different things.
 			told := *found
 			told.Serves, err = ServedTo(told.Serves, as)
 			if err != nil {
 				return nil, fmt.Errorf("%s is told about %s: %w", m.Module, to, err)
 			}
 			file, err := boundFile(told, m.Binds[to], as, own)
 			if err != nil {
 				return nil, err
 			}
@@ -728,10 +719,7 @@ func (r Resolution) compose(with Rendering, owner map[string]string,
 			return nil, err
 		}
 		// And what its bindings say, for the half of a connection that is not secret.
-		known, err := knownFor(m, r.Needs, r.Node)
+		known := knownFor(m, r.Needs, r.Node)
 		if err != nil {
 			return nil, err
 		}
 		// A requirement answered on this same machine is not in r.Needs — its binding file is
 		// written from `here` (above) — and so `${bound:…}` could not name it, though the file
 		// beside it said the same facts. Filled from the same answer, so the two cannot disagree.
@@ -748,11 +736,7 @@ func (r Resolution) compose(with Rendering, owner map[string]string,
 			}
 			local := *answered
 			local.For = m.Module
-			here, err := knownFor(m, []Needed{local}, r.Node)
+			for provision, values := range knownFor(m, []Needed{local}, r.Node) {
 			if err != nil {
 				return nil, err
 			}
 			for provision, values := range here {
 				known[provision] = values
 			}
 		}
@@ -777,17 +761,6 @@ func (r Resolution) compose(with Rendering, owner map[string]string,
 		// And the machine underneath, which no binding of its own can tell it.
 		thisMachine := machineFacts(r, with.Names, with.MeshRange)
 		// **A definition that already holds the answer transcribed it** (novox/hq ADR 0201).
 		// Judged over what the module itself declares, and before anything is substituted: the
 		// mesh's own generated files — the binding, the contributions — legitimately carry the
 		// derived value, and after substitution so does every consumer's file, so this is the one
 		// moment the two can be told apart.
 		for _, own := range m.Resources {
 			if err := notTranscribed(own, known, m.Module); err != nil {
 				return nil, err
 			}
 		}
 		// Which of this module's files carry a secret, for the rule that a container may not read
 		// one of them as its environment without saying so (ADR 0086, issue 041).
 		secretFiles := secretFilesOf(resources)
@@ -907,15 +880,6 @@ func (r Resolution) compose(with Rendering, owner map[string]string,
 			if renamed := reflectsRenamed(m.Module, resource["reload-on"]); renamed != nil {
 				copied["reload-on"] = renamed
 			}
 			// And which of its module's containers a scheduled step holds still (novox/hq ADR 0189).
 			// **The loudest of the three when it is missed.** An unprefixed `restart-on` matches
 			// nothing and a service quietly never restarts; an unprefixed `while-stopped` names a
 			// container the declaration does not contain, and the host refuses the whole
 			// declaration — so the machine takes nothing at all, for every push, until this is
 			// right. That is what it did on the control node (2026-10-04).
 			if renamed := reflectsRenamed(m.Module, resource[WhileStopped]); renamed != nil {
 				copied[WhileStopped] = renamed
 			}
 			// And what a process replaces (novox/hq issue 213): a resource of this module's that it
 			// no longer declares, named as the host recorded it, or the host hands nothing over and
 			// removes it first.
@@ -1211,19 +1175,6 @@ type Contribution struct {
 	// requirement's name — everything providing `reverse-proxy` understands the same shape, which
 	// is what makes swapping one for another cost nothing.
 	Values map[string]any `json:"values"`
 	// Derived is what this provider's own definition said it derives for this consumer, already
 	// derived (novox/hq ADR 0201).
 	//
 	// **The provider is told, rather than recomputing it.** A served value may name the consumer's
 	// identity — a bucket named for who is asking, a database prefixed with it — and before this
 	// the rule lived twice: once in the provisioner's code, once transcribed into every consumer's
 	// definition. The mesh fills the provider's own statement here and delivers the same filled
 	// value to the consumer, so the two cannot disagree: there is no second computation to
 	// disagree with.
 	//
 	// Only the keys that are per-consumer. The rest of what the provider serves is the same for
 	// everyone and is in its own definition, where it already is.
 	Derived map[string]any `json:"derived,omitempty"`
 }
 // grantPath is where one consumer's sealed credential lands on the providing machine.
@@ -1315,17 +1266,12 @@ func (r Resolution) contributions(settings SettingsBy, grants []Grant,
 			// told about it and withdraws the login on its next pass.
 			continue
 		}
 		as := holderAs(ConsumerIdentity(g.Consumer, IdentitySource(g.Slug, g.From)), g.Local)
 		derived, err := r.derivedFor(g.Provision, as, g.From, g.Local, settings)
 		if err != nil {
 			return nil, err
 		}
 		out[g.Provision] = append(out[g.Provision], Contribution{
-			From: g.From, Node: g.Consumer, At: g.At, Values: g.Values, Derived: derived,
+			From: g.From, Node: g.Consumer, At: g.At, Values: g.Values,
 			// One holder per local name: the identity the consumer is known by, and the local name
 			// after it where the module keeps several (ADR 0094). Not a login any backend checks —
 			// a secret is not a login — so the identity limit does not apply to the suffix.
-			As:     as,
+			As:     holderAs(ConsumerIdentity(g.Consumer, IdentitySource(g.Slug, g.From)), g.Local),
 			Secret: grantPath(directories[g.Provision], g.Consumer, holderAs(g.From, g.Local)),
 		})
 		if granted[g.Provision] == nil {
@@ -1,343 +0,0 @@
 package catalogue
 import (
 	"encoding/json"
 	"strings"
 	"testing"
 )
 // What a provider derives for each consumer, said once and delivered to both ends
 // (novox/hq ADR 0201, issue 124).
 //
 // The failure these are written against: the object store's provisioner derived each consumer's
 // bucket from the login the mesh minted, in its own code, and the mesh had no channel to tell the
 // consumer which bucket that was — so all three consumers wrote the answer into their own
 // definitions by hand. Two were right. One named a predecessor's bucket and would have
 // authenticated successfully and been refused on every object. Each of them also named the
 // machine the module happens to run on, which a definition may not do.
 // store is an object store in the shape minio has: it serves a region and a port to everyone, and
 // a bucket named for whoever is asking.
 func store() Manifest {
 	return Manifest{
 		Module: "store", Version: "1",
 		Provides: FromAnywhere("s3-bucket"),
 		Listens:  []Listening{{Port: 9000, Protocol: "tcp", From: FromMesh}},
 		Serves: map[string]map[string]any{"s3-bucket": {
 			"region": "eu-west",
 			"bucket": "${consumer:as:dns}",
 		}},
 		Receives: map[string]string{"s3-bucket": "/var/lib/store/grants/mesh.json"},
 		Grants:   map[string]string{"s3-bucket": "/var/lib/store/grants"},
 		Resources: []map[string]any{{
 			"id": "server", "type": "container", "name": "store", "ports": []any{"9000"},
 		}},
 	}
 }
 // files is a consumer that writes the bucket into its own configuration — which is the thing it
 // could not do before, and had to transcribe.
 func files() Manifest {
 	return Manifest{
 		Module: "files", Version: "1", Slug: "files",
 		Requires: []string{"s3-bucket"},
 		Binds:    map[string]string{"s3-bucket": "/var/lib/files/store.json"},
 		Secrets:  map[string]string{"s3-bucket": "/var/lib/files/store.secret"},
 		Resources: []map[string]any{{
 			"id": "env", "type": "file", "path": "/var/lib/files/env", "mode": "0600",
 			"content": "BUCKET=${bound:s3-bucket:bucket}\nREGION=${bound:s3-bucket:region}\n",
 		}},
 	}
 }
 // pics is a second consumer of the same provider on the same machine: two derivations, neither
 // the other's.
 func pics() Manifest {
 	return Manifest{
 		Module: "pics", Version: "1", Slug: "pics",
 		Requires: []string{"s3-bucket"},
 		Binds:    map[string]string{"s3-bucket": "/var/lib/pics/store.json"},
 		Secrets:  map[string]string{"s3-bucket": "/var/lib/pics/store.secret"},
 		Resources: []map[string]any{{
 			"id": "env", "type": "file", "path": "/var/lib/pics/env", "mode": "0600",
 			"content": "BUCKET=${bound:s3-bucket:bucket}\n",
 		}},
 	}
 }
 // The three places the derived value lands must agree, because agreeing is the whole point: the
 // consumer's own file, the binding it reads as JSON, and the provider's contributions entry.
 func TestADerivedValueReachesBothEndsAndAgrees(t *testing.T) {
 	r, err := Resolve(shelf(store(), files()), []string{"store", "files"}, reachable(), World{})
 	if err != nil {
 		t.Fatal(err)
 	}
 	out, err := r.Declaration(Rendering{Grants: []Grant{{
 		Provision: "s3-bucket", Consumer: "workstation", From: "files", Slug: "files",
 		Values: map[string]any{}, Sealed: "c2VhbGVk",
 	}}})
 	if err != nil {
 		t.Fatal(err)
 	}
 	// The mesh minted this identity for the consumer; the bucket is that identity as a DNS label.
 	// Derived here with the mesh's own function, so the test cannot agree with a wrong rule.
 	as := ConsumerIdentity("workstation", IdentitySource("files", "files"))
 	want := strings.ReplaceAll(as, "_", "-")
 	if want == as || !strings.Contains(as, "_") {
 		t.Fatalf("the mesh's identity %q has no separator to rewrite; this test proves nothing", as)
 	}
 	env := fileNamed(out, "files.env")
 	if env == nil {
 		t.Fatalf("the consumer was given no file: %v", out)
 	}
 	if got := env["content"].(string); !strings.Contains(got, "BUCKET="+want+"\n") {
 		t.Errorf("the consumer's own file was not told the bucket:\n%s\nwant BUCKET=%s", got, want)
 	}
 	binding := fileNamed(out, "files.bound-s3-bucket")
 	if binding == nil {
 		t.Fatalf("the consumer was given no binding: %v", out)
 	}
 	var said struct {
 		Serves map[string]any `json:"serves"`
 	}
 	if err := json.Unmarshal([]byte(binding["content"].(string)), &said); err != nil {
 		t.Fatal(err)
 	}
 	if said.Serves["bucket"] != want {
 		t.Errorf("the binding says the bucket is %q, want %q", said.Serves["bucket"], want)
 	}
 	// And what is the same for everybody is still the same for everybody.
 	if said.Serves["region"] != "eu-west" {
 		t.Errorf("the binding lost what the provider serves to all: %v", said.Serves)
 	}
 	given := storeGrants(t, out)
 	if len(given) != 1 {
 		t.Fatalf("the provider was told about %d consumer(s): %v", len(given), given)
 	}
 	if given[0].Derived["bucket"] != want {
 		t.Errorf("the provider was told the bucket is %v, and the consumer was told %q — "+
 			"the two ends disagree, which is the whole failure", given[0].Derived["bucket"], want)
 	}
 	// Only the per-consumer half. The region is the same for everyone and is already in the
 	// provider's own definition; repeating it here would be a copy to go stale.
 	if _, carried := given[0].Derived["region"]; carried {
 		t.Errorf("the provider was handed back what it already says for everyone: %v", given[0].Derived)
 	}
 }
 // Two consumers of one provider on one machine get two buckets, and neither gets the other's.
 func TestTwoConsumersOfOneProviderGetTheirOwnDerivation(t *testing.T) {
 	r, err := Resolve(shelf(store(), files(), pics()),
 		[]string{"store", "files", "pics"}, reachable(), World{})
 	if err != nil {
 		t.Fatal(err)
 	}
 	out, err := r.Declaration(Rendering{Grants: []Grant{
 		{Provision: "s3-bucket", Consumer: "workstation", From: "files", Slug: "files",
 			Values: map[string]any{}, Sealed: "c2VhbGVk"},
 		{Provision: "s3-bucket", Consumer: "workstation", From: "pics", Slug: "pics",
 			Values: map[string]any{}, Sealed: "c2VhbGVk"},
 	}})
 	if err != nil {
 		t.Fatal(err)
 	}
 	forFiles := strings.ReplaceAll(ConsumerIdentity("workstation", IdentitySource("files", "files")), "_", "-")
 	forPics := strings.ReplaceAll(ConsumerIdentity("workstation", IdentitySource("pics", "pics")), "_", "-")
 	if forFiles == forPics {
 		t.Fatal("the two consumers were given the same identity; this test proves nothing")
 	}
 	if got := fileNamed(out, "files.env")["content"].(string); !strings.Contains(got, "BUCKET="+forFiles+"\n") {
 		t.Errorf("files was not given its own bucket:\n%s", got)
 	}
 	if got := fileNamed(out, "pics.env")["content"].(string); !strings.Contains(got, "BUCKET="+forPics+"\n") {
 		t.Errorf("pics was not given its own bucket:\n%s", got)
 	}
 	var buckets []any
 	for _, g := range storeGrants(t, out) {
 		buckets = append(buckets, g.Derived["bucket"])
 	}
 	if len(buckets) != 2 || buckets[0] == buckets[1] {
 		t.Errorf("the provider was told %v; it must be told one bucket per consumer", buckets)
 	}
 }
 // An operator may still set what the provider serves, and the mesh still derives the rest: the
 // setting is laid on first, then the consumer's half is filled.
 func TestASettingComposesWithADerivedValue(t *testing.T) {
 	r, err := Resolve(shelf(store(), files()), []string{"store", "files"}, reachable(), World{})
 	if err != nil {
 		t.Fatal(err)
 	}
 	out, err := r.Declaration(Rendering{
 		Settings: SettingsBy{"store": {{From: "the operator",
 			Values: map[string]any{"bucket": "team-${consumer:as:dns}"}}}},
 		Grants: []Grant{{Provision: "s3-bucket", Consumer: "workstation", From: "files", Slug: "files",
 			Values: map[string]any{}, Sealed: "c2VhbGVk"}},
 	})
 	if err != nil {
 		t.Fatal(err)
 	}
 	want := "team-" + strings.ReplaceAll(ConsumerIdentity("workstation", IdentitySource("files", "files")), "_", "-")
 	if got := fileNamed(out, "files.env")["content"].(string); !strings.Contains(got, "BUCKET="+want+"\n") {
 		t.Errorf("the operator's prefix did not survive the derivation:\n%s\nwant BUCKET=%s", got, want)
 	}
 	if given := storeGrants(t, out); given[0].Derived["bucket"] != want {
 		t.Errorf("the provider was told %v, the consumer %q", given[0].Derived["bucket"], want)
 	}
 }
 // A fact or an alphabet the mesh does not have is refused where the definition is, not where a
 // consumer happens to be resolved — and the refusal says what may be said instead.
 func TestAServedValueNamingSomethingTheMeshDoesNotHaveIsRefused(t *testing.T) {
 	for _, c := range []struct{ value, says string }{
 		{"${consumer:node}", "as"},
 		{"${consumer:as:punycode}", "dns"},
 	} {
 		m := store()
 		m.Serves["s3-bucket"]["bucket"] = c.value
 		raw, err := json.Marshal(m)
 		if err != nil {
 			t.Fatal(err)
 		}
 		_, err = ParseManifest(raw)
 		if err == nil {
 			t.Fatalf("%s was accepted", c.value)
 		}
 		if !strings.Contains(err.Error(), c.value) {
 			t.Errorf("the refusal of %s does not quote it: %v", c.value, err)
 		}
 		if !strings.Contains(err.Error(), c.says) {
 			t.Errorf("the refusal of %s does not say what may be said (%q): %v", c.value, c.says, err)
 		}
 	}
 }
 // `dns` is checked against an identity the mesh actually mints, not an invented string.
 func TestTheDNSAlphabetIsTheMintedIdentityWithItsSeparatorRewritten(t *testing.T) {
 	as := ConsumerIdentity("anchor", IdentitySource("ncloud", "nextcloud"))
 	if err := CheckIdentity("anchor", IdentitySource("ncloud", "nextcloud")); err != nil {
 		t.Fatalf("the mesh would not mint this identity at all: %v", err)
 	}
 	label := asDNSLabel(as)
 	if strings.Contains(label, "_") {
 		t.Errorf("%q is not a DNS label", label)
 	}
 	if strings.ReplaceAll(label, "-", "_") != as {
 		t.Errorf("%q is not %q with its separator rewritten", label, as)
 	}
 }
 // The check that would have caught the one wrong instance: a consumer that writes the derived
 // value into its own definition instead of asking for it is refused, whether it transcribed the
 // right answer or a predecessor's.
 func TestAConsumerThatTranscribesWhatItsProviderDerivesIsRefused(t *testing.T) {
 	as := ConsumerIdentity("workstation", IdentitySource("files", "files"))
 	transcribed := strings.ReplaceAll(as, "_", "-")
 	m := files()
 	m.Resources = []map[string]any{{
 		"id": "env", "type": "file", "path": "/var/lib/files/env", "mode": "0600",
 		// Exactly what the provider will create — correct today, and a copy of a rule that is
 		// not this module's.
 		"content": "BUCKET=" + transcribed + "\n",
 	}}
 	r, err := Resolve(shelf(store(), m), []string{"store", "files"}, reachable(), World{})
 	if err != nil {
 		t.Fatal(err)
 	}
 	_, err = r.Declaration(Rendering{Grants: []Grant{{
 		Provision: "s3-bucket", Consumer: "workstation", From: "files", Slug: "files",
 		Values: map[string]any{}, Sealed: "c2VhbGVk",
 	}}})
 	if err == nil {
 		t.Fatal("a definition holding its own copy of the provider's naming rule was accepted")
 	}
 	if !strings.Contains(err.Error(), "${bound:s3-bucket:bucket}") {
 		t.Errorf("the refusal does not say what to write instead: %v", err)
 	}
 	// And a constant the provider serves to everyone is not a transcription: repeating it is
 	// redundant, not wrong, and refusing it would be the mesh policing style.
 	m.Resources = []map[string]any{{
 		"id": "env", "type": "file", "path": "/var/lib/files/env", "mode": "0600",
 		"content": "REGION=eu-west\n",
 	}}
 	r, err = Resolve(shelf(store(), m), []string{"store", "files"}, reachable(), World{})
 	if err != nil {
 		t.Fatal(err)
 	}
 	if _, err := r.Declaration(Rendering{Grants: []Grant{{
 		Provision: "s3-bucket", Consumer: "workstation", From: "files", Slug: "files",
 		Values: map[string]any{}, Sealed: "c2VhbGVk",
 	}}}); err != nil {
 		t.Errorf("a value the provider serves to everyone was judged a transcription: %v", err)
 	}
 }
 func storeGrants(t *testing.T, out []map[string]any) []Contribution {
 	t.Helper()
 	for _, r := range out {
 		if r["path"] != "/var/lib/store/grants/mesh.json" {
 			continue
 		}
 		var parsed struct {
 			Given []Contribution `json:"given"`
 		}
 		if err := json.Unmarshal([]byte(r["content"].(string)), &parsed); err != nil {
 			t.Fatal(err)
 		}
 		return parsed.Given
 	}
 	t.Fatalf("the provider was given no contributions file: %v", out)
 	return nil
 }
 // A consumer that keeps SEVERAL holders of one provision is refused, rather than told one thing
 // while its provider is told another.
 //
 // **This is issue 124's own failure, one case to the side.** The mesh gives each holder its own
 // login — `mesh_node_mod_<local>` (ADR 0094) — and the provider derives from the login, so it
 // would make one resource per holder. The consumer's side has no such dimension: there is one
 // binding file per provision and one `${bound:<provision>:<key>}`, both derived from the
 // un-suffixed identity. So the provider would create `…-mod-cold` and the consumer would be
 // configured against `…-mod`: it would authenticate successfully and be refused on every object,
 // which is exactly the fault this whole record exists to end.
 //
 // Refused, loudly, at the one place that can see both halves. Lifting it means giving the
 // consumer's side a local dimension, which is a decision and not an omission.
 func TestAConsumerWithSeveralHoldersOfADerivingProviderIsRefused(t *testing.T) {
 	m := files()
 	// Two holders of the one provision, the shape ADR 0094 gives a module that keeps several.
 	m.Secrets = nil
 	m.SecretsMany = map[string]map[string]string{"s3-bucket": {
 		"hot":  "/var/lib/files/hot.secret",
 		"cold": "/var/lib/files/cold.secret",
 	}}
 	m.Resources = []map[string]any{{
 		"id": "env", "type": "file", "path": "/var/lib/files/env", "mode": "0600",
 		"content": "BUCKET=${bound:s3-bucket:bucket}\n",
 	}}
 	r, err := Resolve(shelf(store(), m), []string{"store", "files"}, reachable(), World{})
 	if err != nil {
 		t.Fatal(err)
 	}
 	_, err = r.Declaration(Rendering{Grants: []Grant{
 		{Provision: "s3-bucket", Consumer: "workstation", From: "files", Slug: "files",
 			Local: "hot", Values: map[string]any{}, Sealed: "c2VhbGVk"},
 		{Provision: "s3-bucket", Consumer: "workstation", From: "files", Slug: "files",
 			Local: "cold", Values: map[string]any{}, Sealed: "c2VhbGVk"},
 	}})
 	if err == nil {
 		t.Fatal("a consumer with several holders of a deriving provider was accepted; " +
 			"its two ends would have disagreed in silence")
 	}
 	for _, want := range []string{"files", "s3-bucket", "bucket"} {
 		if !strings.Contains(err.Error(), want) {
 			t.Errorf("the refusal does not name %q: %v", want, err)
 		}
 	}
 }
@@ -1,29 +0,0 @@
 package catalogue
 import (
 	"os"
 	"regexp"
 	"testing"
 )
 // novox/hq issue 223: genesis raises the controller as a container built from this repository's own
 // Dockerfile, with no build arguments — the manifest no longer builds an image, so nothing passes a
 // base in. The Dockerfile's own default must therefore be a Go that builds this module, pinned by
 // digest, and the replacement the manifest's process names must be the container genesis raises.
 func TestGenesisCanBuildTheControllersImageAsItStands(t *testing.T) {
 	raw, err := os.ReadFile("../../Dockerfile")
 	if err != nil {
 		t.Fatal(err)
 	}
 	if !regexp.MustCompile(`(?m)^ARG GO_BASE=golang@sha256:[0-9a-f]{64}$`).Match(raw) {
 		t.Fatal("the Dockerfile's default Go base is not pinned by digest; genesis builds it with no arguments")
 	}
 	makefile, err := os.ReadFile("../../Makefile")
 	if err != nil {
 		t.Fatal(err)
 	}
 	pin := regexp.MustCompile(`golang@sha256:[0-9a-f]{64}`)
 	if string(pin.Find(raw)) != string(pin.Find(makefile)) {
 		t.Errorf("the Dockerfile and the Makefile build on different Go: %s, %s", pin.Find(raw), pin.Find(makefile))
 	}
 }
@@ -325,15 +325,6 @@ type Manifest struct {
 	// person's account (design 25 §7) already had the same shape.
 	Invokes []string `json:"invokes,omitempty"`
 	// State is the current state this module keeps on the bus, by local name: each a key-value
 	// bucket the controller creates, which every instance of the module writes and reads
 	// (novox/hq ADR 0201). Not history — that is an event — and never a secret, sealed or not.
 	State []StateDeclaration `json:"state,omitempty"`
 	// Reads are other modules' state this module reads and watches, each `<module>.<name>`
 	// (novox/hq ADR 0201). Read-only: only the owner's instances write.
 	Reads []string `json:"reads,omitempty"`
 	// Capabilities the machine must have. A different field from Requires because the remedy
 	// differs: a missing module can be assigned, and a missing capability means the wrong
 	// machine.
@@ -1325,8 +1316,6 @@ func ParseManifest(raw []byte) (Manifest, error) {
 	// module whose event names are wrong installs, starts, connects and reacts to nothing, with
 	// every log line saying it is fine (novox/hq 04-ISSUES/127).
 	problems = append(problems, EventProblems(m)...)
 	// And what it may call its state, and whose it may read (state.go, novox/hq ADR 0201).
 	problems = append(problems, StateProblems(m)...)
 	wellFormed := true
 	for _, c := range m.Claims {
 		if !name.MatchString(c.Name) {
@@ -1439,10 +1428,6 @@ func ParseManifest(raw []byte) (Manifest, error) {
 				"%s serves %q to whoever requires it, and does not provide it", m.Module, to))
 		}
 	}
 	// A served value may be derived for the consumer it is served to (novox/hq ADR 0201). Read
 	// here, where the definition is, rather than when somebody first requires it: a rule that
 	// would be refused at the first consumer is wrong from the moment it is written.
 	problems = append(problems, CheckServes(m)...)
 	for to, where := range m.Binds {
 		if !placedOrAbsolute(where) {
 			problems = append(problems, fmt.Sprintf(
@@ -1637,13 +1622,6 @@ func ParseManifest(raw []byte) (Manifest, error) {
 				}
 			}
 		}
 		// **A scheduled step may hold this module's own containers still while it runs**
 		// (novox/hq ADR 0189). What the host judges is the declaration it receives — whether each
 		// id is a container placed on that machine; what belongs here is what only the definition
 		// shows: that the ids are this module's, that they are containers, and that the step is
 		// scheduled. A module naming a neighbour's container would be a module that can stop the
 		// mesh, and the manifest is where that is visible.
 		problems = append(problems, whileStoppedProblems(m, r, hasSchedule(r))...)
 	}
 	for name, own := range m.OwnSecrets {
 		if !placedOrAbsolute(own.Path) {
@@ -2175,71 +2153,3 @@ func (o OwnSecrets) Paths() map[string]string {
 // InstancesInterchangeable is the one value of a definition's `instances`: the module is the same
 // on every machine, so any instance may answer for the module.
 const InstancesInterchangeable = "interchangeable"
 // WhileStopped is the resource key naming the containers a scheduled step holds still while it
 // runs (novox/hq ADR 0189). Carried to the host unchanged, like `schedule`.
 const WhileStopped = "while-stopped"
 // hasSchedule is whether a resource declares a cadence, as a string.
 func hasSchedule(r map[string]any) bool {
 	s, _ := r["schedule"].(string)
 	return s != ""
 }
 // whileStoppedProblems judges one container's maintenance window against its own definition
 // (novox/hq ADR 0189).
 //
 // Three things the manifest is the only place to see: that the step is scheduled (a one-time
 // offline job says *before* rather than *instead of* — at apply the host already has a window,
 // because the declaration is applied in order and a run-once step gates what follows); that every
 // id it names is **this module's own** container; and that it does not name itself.
 //
 // The host checks the fourth — that the container is actually placed on that machine — because
 // that is a fact about the declaration and not about the definition.
 func whileStoppedProblems(m Manifest, r map[string]any, scheduled bool) []string {
 	raw, present := r[WhileStopped]
 	if !present {
 		return nil
 	}
 	ids, ok := raw.([]any)
 	if !ok {
 		return []string{fmt.Sprintf(
 			"%s declares %s on %v as a %T; it is a list of this module's container ids",
 			m.Module, WhileStopped, r["id"], raw)}
 	}
 	var problems []string
 	if len(ids) > 0 && !scheduled {
 		problems = append(problems, fmt.Sprintf(
 			"%s declares %s on %v, which has no schedule. A maintenance window is for a recurring "+
 				"step: at apply the mesh already has one, because a run-once step gates what is "+
 				"declared after it (novox/hq ADR 0189)", m.Module, WhileStopped, r["id"]))
 	}
 	containers := map[string]bool{}
 	for _, own := range m.Resources {
 		if fmt.Sprint(own["type"]) == "container" {
 			containers[fmt.Sprint(own["id"])] = true
 		}
 	}
 	for _, each := range ids {
 		id, ok := each.(string)
 		if !ok {
 			problems = append(problems, fmt.Sprintf(
 				"%s declares %s on %v naming a %T; each entry is a container's id",
 				m.Module, WhileStopped, r["id"], each))
 			continue
 		}
 		if id == fmt.Sprint(r["id"]) {
 			problems = append(problems, fmt.Sprintf(
 				"%s declares %s on %v naming itself", m.Module, WhileStopped, r["id"]))
 			continue
 		}
 		if !containers[id] {
 			problems = append(problems, fmt.Sprintf(
 				"%s declares %s on %v naming %q, which is not a container this module declares. "+
 					"A step may hold still its own module's containers and nobody else's — one "+
 					"that could quiesce a neighbour could stop the mesh",
 				m.Module, WhileStopped, r["id"], id))
 		}
 	}
 	return problems
 }
@@ -215,13 +215,6 @@ func CatalogueProblems(shelf Shelf) []string {
 			}
 		}
 	}
 	// A read of a module's state that module does not keep (novox/hq ADR 0201) — said only where the
 	// owner is on the shelf, as a consumer may be installed before its emitter.
 	var manifests []Manifest
 	for _, module := range shelfOrder(shelf) {
 		manifests = append(manifests, shelf[module])
 	}
 	problems = append(problems, StateReadsNothingDeclares(manifests)...)
 	sort.Strings(problems)
 	return problems
 }
@@ -1,150 +0,0 @@
 package catalogue
 import (
 	"bytes"
 	"encoding/json"
 	"fmt"
 	"regexp"
 	"strings"
 )
 // What a module may call its state, and whose state it may ask to read (novox/hq ADR 0201).
 //
 // A module names its state **locally** — `servers`, never a bucket or a subject — and another
 // module's as `<module>.<name>`, the way a consumed event names its emitter (design 32 §1). The
 // mesh derives the bucket from the two names, so the module and the local name must each be one
 // token: the bucket joins them with an underscore, which neither may contain, so two modules can
 // never derive one bucket.
 // stateName is one local name of a module's state: lower-case, no dot, no underscore.
 var stateName = regexp.MustCompile(`^[a-z0-9][a-z0-9-]*$`)
 // The mesh's caps on what a module may ask of a bucket's history.
 const (
 	// StateMostHistory is the most past values a key may keep. The server's own limit.
 	StateMostHistory = 64
 )
 // StateDeclaration is one bucket a module owns: its local name, and the options that are the
 // owner's to choose, as a seat chooses how long its backlog survives (design 32 §3).
 type StateDeclaration struct {
 	Name string `json:"name"`
 	// History is how many values a key keeps, the current one included; zero is one.
 	History int `json:"history,omitempty"`
 	// TTLSeconds is how long a value lives once written; zero is until it is replaced or deleted.
 	TTLSeconds int `json:"ttl-seconds,omitempty"`
 }
 // UnmarshalJSON reads a bucket as its bare name, or as {name, history, ttl-seconds}.
 func (s *StateDeclaration) UnmarshalJSON(raw []byte) error {
 	trimmed := bytes.TrimSpace(raw)
 	if len(trimmed) > 0 && trimmed[0] == '"' {
 		return json.Unmarshal(trimmed, &s.Name)
 	}
 	type plain StateDeclaration
 	var full plain
 	dec := json.NewDecoder(bytes.NewReader(trimmed))
 	dec.DisallowUnknownFields()
 	if err := dec.Decode(&full); err != nil {
 		return fmt.Errorf("a state is either a name or {name, history, ttl-seconds}: %w", err)
 	}
 	*s = StateDeclaration(full)
 	return nil
 }
 // MarshalJSON writes back the short form when there is nothing else to say.
 func (s StateDeclaration) MarshalJSON() ([]byte, error) {
 	if s.History == 0 && s.TTLSeconds == 0 {
 		return json.Marshal(s.Name)
 	}
 	type plain StateDeclaration
 	return json.Marshal(plain(s))
 }
 // ReadState splits a read into the owning module and the local name, or says why it is not one.
 func ReadState(read string) (module, local string, err error) {
 	at := strings.LastIndex(read, ".")
 	if at <= 0 || at == len(read)-1 {
 		return "", "", fmt.Errorf("%q does not name a module and its state: a read is <module>.<name>", read)
 	}
 	module, local = read[:at], read[at+1:]
 	if !stateName.MatchString(module) {
 		return "", "", fmt.Errorf("%q cannot own state: a module whose state is read is one plain name", module)
 	}
 	if !stateName.MatchString(local) {
 		return "", "", fmt.Errorf("%q is not a state name: lower-case letters, digits and hyphens", local)
 	}
 	return module, local, nil
 }
 // StateProblems is what is wrong with a manifest's state and reads.
 //
 // Refused at registration, because a bucket name the bus cannot hold is a module that installs,
 // starts, and is refused on its first write with a reason about a bucket nobody named.
 func StateProblems(m Manifest) []string {
 	var problems []string
 	if len(m.State) > 0 && !stateName.MatchString(m.Module) {
 		problems = append(problems, fmt.Sprintf(
 			"%s keeps state, and a module's name is part of its buckets' names, which take one plain "+
 				"name — no dot (novox/hq ADR 0201)", m.Module))
 	}
 	seen := map[string]bool{}
 	for _, s := range m.State {
 		switch {
 		case !stateName.MatchString(s.Name):
 			problems = append(problems, fmt.Sprintf(
 				"%s keeps state %q: a state is named locally — lower-case letters, digits and hyphens, "+
 					"no dot and no underscore; the mesh derives the bucket (novox/hq ADR 0201)", m.Module, s.Name))
 		case seen[s.Name]:
 			problems = append(problems, fmt.Sprintf("%s keeps state %q twice", m.Module, s.Name))
 		}
 		seen[s.Name] = true
 		if s.History < 0 || s.History > StateMostHistory {
 			problems = append(problems, fmt.Sprintf(
 				"%s keeps %d values of %q; a key keeps between 1 and %d", m.Module, s.History, s.Name, StateMostHistory))
 		}
 		if s.TTLSeconds < 0 {
 			problems = append(problems, fmt.Sprintf("%s gives %q a negative lifetime", m.Module, s.Name))
 		}
 	}
 	for _, r := range m.Reads {
 		module, _, err := ReadState(r)
 		if err != nil {
 			problems = append(problems, fmt.Sprintf("%s reads %v", m.Module, err))
 			continue
 		}
 		if module == m.Module {
 			problems = append(problems, fmt.Sprintf(
 				"%s reads %q, which is its own state: a module reads and writes what it keeps already", m.Module, r))
 		}
 	}
 	return problems
 }
 // StateReadsNothingDeclares is every read across a catalogue whose owner is present and declares no
 // such state. An absent owner says nothing — a module may be installed long before the one whose
 // state it reads, as a consumer may before its emitter (design 32 §1).
 func StateReadsNothingDeclares(manifests []Manifest) []string {
 	declared := map[string]map[string]bool{}
 	for _, m := range manifests {
 		own := map[string]bool{}
 		for _, s := range m.State {
 			own[s.Name] = true
 		}
 		declared[m.Module] = own
 	}
 	var problems []string
 	for _, m := range manifests {
 		for _, r := range m.Reads {
 			module, local, err := ReadState(r)
 			if err != nil {
 				continue
 			}
 			if own, present := declared[module]; present && !own[local] {
 				problems = append(problems, fmt.Sprintf(
 					"%s reads %q, and %s keeps no state called %q", m.Module, r, module, local))
 			}
 		}
 	}
 	return problems
 }
@@ -1,94 +0,0 @@
 package catalogue
 import (
 	"encoding/json"
 	"strings"
 	"testing"
 )
 // A module declares the state it keeps and the state it reads (novox/hq ADR 0201), a bucket by its
 // bare name or with the owner's options.
 func TestAManifestMaySayWhatStateItKeepsAndReads(t *testing.T) {
 	m, err := ParseManifest([]byte(`{"module":"claude-code","version":"1",` +
 		`"state":["servers",{"name":"seen","history":5,"ttl-seconds":3600}],` +
 		`"reads":["licence-manager.bindings"]}`))
 	if err != nil {
 		t.Fatal(err)
 	}
 	if len(m.State) != 2 || m.State[0].Name != "servers" || m.State[1].History != 5 || m.State[1].TTLSeconds != 3600 {
 		t.Fatalf("state not read: %+v", m.State)
 	}
 	if len(m.Reads) != 1 || m.Reads[0] != "licence-manager.bindings" {
 		t.Fatalf("reads not read: %v", m.Reads)
 	}
 	// Written back as it came in: the short form where nothing else is said.
 	out, _ := json.Marshal(m.State)
 	if string(out) != `["servers",{"name":"seen","history":5,"ttl-seconds":3600}]` {
 		t.Fatalf("written back as %s", out)
 	}
 }
 // A name the bus could not hold, or that would let two modules derive one bucket, is refused at
 // registration in the manifest's words.
 func TestAStateNameIsLocalAndOneToken(t *testing.T) {
 	for _, c := range []struct{ manifest, says string }{
 		{`{"module":"a","version":"1","state":["mesh.servers"]}`, `keeps state "mesh.servers": a state is named locally`},
 		{`{"module":"a","version":"1","state":["my_servers"]}`, `keeps state "my_servers"`},
 		{`{"module":"a","version":"1","state":["s","s"]}`, `keeps state "s" twice`},
 		{`{"module":"a","version":"1","state":[{"name":"s","history":65}]}`, `a key keeps between 1 and 64`},
 		{`{"module":"a.b","version":"1","state":["s"]}`, `no dot`},
 		{`{"module":"a","version":"1","reads":["bindings"]}`, `a read is <module>.<name>`},
 		{`{"module":"a","version":"1","reads":["a.s"]}`, `which is its own state`},
 		{`{"module":"a","version":"1","state":[{"name":"s","shared":true}]}`, `{name, history, ttl-seconds}`},
 	} {
 		_, err := ParseManifest([]byte(c.manifest))
 		if err == nil {
 			t.Errorf("%s was accepted", c.manifest)
 			continue
 		}
 		if !strings.Contains(err.Error(), c.says) {
 			t.Errorf("%s refused for the wrong reason: %v", c.manifest, err)
 		}
 	}
 }
 // A read whose owner is present must name a state that owner keeps; an absent owner says nothing,
 // because a module may be installed before the one whose state it reads.
 func TestAReadNamesStateItsOwnerKeeps(t *testing.T) {
 	owner := Manifest{Module: "licence-manager", State: []StateDeclaration{{Name: "bindings"}}}
 	good := Manifest{Module: "claude-code", Reads: []string{"licence-manager.bindings", "absent.anything"}}
 	bad := Manifest{Module: "other", Reads: []string{"licence-manager.tokens"}}
 	if p := StateReadsNothingDeclares([]Manifest{owner, good}); len(p) != 0 {
 		t.Fatalf("a read of declared state was refused: %v", p)
 	}
 	p := StateReadsNothingDeclares([]Manifest{owner, bad})
 	if len(p) != 1 || !strings.Contains(p[0], `licence-manager keeps no state called "tokens"`) {
 		t.Fatalf("a read of state nobody keeps was not named: %v", p)
 	}
 }
 // **Across the whole catalogue**: every state name is local, and every read whose owner is present
 // names state that owner keeps.
 func TestEveryManifestsStateIsLocalAndEveryReadIsKept(t *testing.T) {
 	manifests := theCatalogue(t)
 	var problems []string
 	for _, m := range manifests {
 		problems = append(problems, StateProblems(m)...)
 	}
 	problems = append(problems, StateReadsNothingDeclares(manifests)...)
 	if len(problems) > 0 {
 		t.Fatalf("the catalogue's state is not what ADR 0201 says:\n  %s", strings.Join(problems, "\n  "))
 	}
 }
 // `module check` says it too: the cross-catalogue pass names a read nothing on the shelf keeps.
 func TestTheCataloguePassNamesAReadItsOwnerDoesNotKeep(t *testing.T) {
 	shelf := Shelf{
 		"licence-manager": {Module: "licence-manager", State: []StateDeclaration{{Name: "bindings"}}},
 		"claude-code":     {Module: "claude-code", Reads: []string{"licence-manager.tokens"}},
 	}
 	problems := CatalogueProblems(shelf)
 	if len(problems) != 1 || !strings.Contains(problems[0], `keeps no state called "tokens"`) {
 		t.Fatalf("the catalogue pass said %v", problems)
 	}
 }
@@ -1,145 +0,0 @@
 package catalogue
 import (
 	"encoding/json"
 	"fmt"
 	"strings"
 	"testing"
 )
 // A scheduled step may hold its module's own containers still while it runs (novox/hq ADR 0189).
 //
 // The host judges what it receives — whether each id is a container on that machine. What the
 // definition is the only place to see is judged here, near whoever wrote it.
 func aStoreManifest(step map[string]any) []byte {
 	m := map[string]any{
 		"module": "distribution", "version": "1",
 		"resources": []any{
 			map[string]any{"id": "store", "type": "container", "name": "mesh-registry",
 				"image": "registry@sha256:" + strings.Repeat("a", 64)},
 			step,
 		},
 	}
 	raw, _ := json.Marshal(m)
 	return raw
 }
 func TestAMaintenanceWindowOnItsOwnModulesContainerIsAccepted(t *testing.T) {
 	raw := aStoreManifest(map[string]any{
 		"id": "collect", "type": "container", "name": "mesh-registry-collect",
 		"image":    "registry@sha256:" + strings.Repeat("a", 64),
 		"schedule": "30 3 * * *", "while-stopped": []any{"store"},
 	})
 	if _, err := ParseManifest(raw); err != nil {
 		t.Fatalf("a step holding its own module's container still was refused: %v", err)
 	}
 }
 func TestAMaintenanceWindowIsRefusedWhereTheDefinitionShowsItCannotMean(t *testing.T) {
 	for _, c := range []struct {
 		name string
 		step map[string]any
 		says string
 	}{
 		{
 			"on a step with no schedule",
 			map[string]any{"id": "collect", "type": "container", "name": "c",
 				"image":         "registry@sha256:" + strings.Repeat("a", 64),
 				"while-stopped": []any{"store"}},
 			"gates what is declared after it",
 		},
 		{
 			"on a run-once step, which already has order",
 			map[string]any{"id": "collect", "type": "container", "name": "c",
 				"image":    "registry@sha256:" + strings.Repeat("a", 64),
 				"run-once": true, "while-stopped": []any{"store"}},
 			"A maintenance window is for a recurring step",
 		},
 		{
 			"naming a container this module does not declare",
 			map[string]any{"id": "collect", "type": "container", "name": "c",
 				"image":    "registry@sha256:" + strings.Repeat("a", 64),
 				"schedule": "30 3 * * *", "while-stopped": []any{"the-broker"}},
 			"could quiesce a neighbour could stop the mesh",
 		},
 		{
 			"naming itself",
 			map[string]any{"id": "collect", "type": "container", "name": "c",
 				"image":    "registry@sha256:" + strings.Repeat("a", 64),
 				"schedule": "30 3 * * *", "while-stopped": []any{"collect"}},
 			"naming itself",
 		},
 		{
 			"written as something that is not a list",
 			map[string]any{"id": "collect", "type": "container", "name": "c",
 				"image":    "registry@sha256:" + strings.Repeat("a", 64),
 				"schedule": "30 3 * * *", "while-stopped": "store"},
 			"a list of this module's container ids",
 		},
 	} {
 		_, err := ParseManifest(aStoreManifest(c.step))
 		if err == nil {
 			t.Errorf("%s was accepted", c.name)
 			continue
 		}
 		if !strings.Contains(err.Error(), c.says) {
 			t.Errorf("%s: the refusal does not say %q:\n%v", c.name, c.says, err)
 		}
 	}
 }
 // A composed declaration names the step's held containers the way the machine knows them.
 //
 // **The gap that let a bug through to the control node.** The manifest says `while-stopped:
 // ["store"]`, because a module names its own resources locally; the declaration a machine
 // receives calls that container `distribution.store`, because every resource is composed under
 // its module. `restart-on` and `reload-on` are rewritten for exactly this reason, and
 // `while-stopped` was not — so the host found no container by that id and refused the whole
 // declaration, every push, until it was fixed.
 //
 // It passed every test on both sides: the controller's tests read manifests, the host's read
 // hand-written declarations with bare ids. Only composing one and judging the result catches it.
 func TestAComposedWindowNamesTheContainerAsTheMachineKnowsIt(t *testing.T) {
 	store := Manifest{
 		Module: "distribution", Version: "1",
 		Provides: FromAnywhere("artifact-store"),
 		Listens:  []Listening{{Port: 5000, Protocol: "tcp", From: FromMesh}},
 		Serves:   map[string]map[string]any{"artifact-store": {"port": 5000}},
 		Resources: []map[string]any{
 			{"id": "store", "type": "container", "name": "mesh-registry",
 				"image": "registry@sha256:" + strings.Repeat("a", 64), "ports": []any{"5000"}},
 			{"id": "collect", "type": "container", "name": "mesh-registry-collect",
 				"image":    "registry@sha256:" + strings.Repeat("a", 64),
 				"schedule": "30 3 * * *", WhileStopped: []any{"store"}},
 		},
 	}
 	r, err := Resolve(shelf(store), []string{"distribution"}, reachable(), World{})
 	if err != nil {
 		t.Fatal(err)
 	}
 	out, err := r.Declaration(Rendering{})
 	if err != nil {
 		t.Fatal(err)
 	}
 	collect := fileNamed(out, "distribution.collect")
 	if collect == nil {
 		for _, res := range out {
 			if res["id"] == "distribution.collect" {
 				collect = res
 			}
 		}
 	}
 	if collect == nil {
 		t.Fatalf("the step was not composed at all: %v", out)
 	}
 	held, _ := collect[WhileStopped].([]any)
 	if len(held) != 1 {
 		t.Fatalf("the composed step holds %v still; want one container", collect[WhileStopped])
 	}
 	if got := fmt.Sprint(held[0]); got != "distribution.store" {
 		t.Fatalf("the composed step says it holds %q still, and the machine's container is "+
 			"called %q — the host refuses a declaration naming a container it does not have, "+
 			"whole, so the machine would take nothing at all", got, "distribution.store")
 	}
 }
@@ -132,9 +132,6 @@ func declaredFor(m catalogue.Manifest, seats map[string]catalogue.SeatDeclaratio
 		Serves: m.Tools,
 		// And what it calls (novox/hq ADR 0152) — the console's `*`, nothing else's.
 		Invokes: m.Invokes,
 		// And the state it keeps and reads (novox/hq ADR 0201).
 		State: bucketsOf(m),
 		Reads: m.Reads,
 	}
 	for _, c := range m.Claims {
 		// Every seat with a protocol, the mesh's own included. One that says only who does a job is
@@ -151,30 +148,6 @@ func declaredFor(m catalogue.Manifest, seats map[string]catalogue.SeatDeclaratio
 	return d
 }
 // bucketsOf is the state a module keeps, as the bus holds it.
 func bucketsOf(m catalogue.Manifest) []broker.Bucket {
 	var out []broker.Bucket
 	for _, s := range m.State {
 		out = append(out, broker.Bucket{Module: m.Module, Name: s.Name, History: s.History, TTLSeconds: s.TTLSeconds})
 	}
 	return out
 }
 // DeclaredBuckets is every bucket the catalogue declares, registered modules assigned or not: a
 // bucket exists from registration, like a seat's stream, so a module reading it may watch before its
 // owner runs anywhere (novox/hq ADR 0201).
 func (i *Inventory) DeclaredBuckets(ctx context.Context) ([]broker.Bucket, error) {
 	declared, err := i.Catalogue(ctx)
 	if err != nil {
 		return nil, fmt.Errorf("cannot read the catalogue: %w", err)
 	}
 	var out []broker.Bucket
 	for _, m := range declared {
 		out = append(out, bucketsOf(m)...)
 	}
 	return out, nil
 }
 func asSeat(s catalogue.SeatDeclaration) broker.Seat {
 	return broker.Seat{Name: s.Name, Scope: s.Scope, Accepts: s.Accepts, Emits: s.Emits,
 		Serves: catalogue.VerbNames(s.Serves)}
@@ -78,12 +78,11 @@ func (i *Inventory) RegisterModule(ctx context.Context, m catalogue.Manifest, fr
 	// (novox/hq ADR 0175, to-be 38 WP2.4): a module serving its tools from a container built on the
 	// runtime's image. Refused at registration, by name, for a module that is new to the catalogue
 	// or that was registered in another shape — the mechanism that keeps the old pattern from
-	// returning by habit. Before the runtime exists the pattern is accepted as it always was.
+	// returning by habit. **Not refused for a module already registered in that shape**: the
-	//
+	// catalogue holds some thirty of them the day the runtime arrives, each moves to a bundle in
-	// *Since 2026-10-04 (to-be 38 WP4b's last step):* refused for **every** module. While some
+	// its own change (to-be 38 WP4 onward), and a gate that refused every rebuild of every unmoved
-	// thirty modules still stood in that shape, one already registered so was rebuilt without
+	// module in the meantime would stop the whole pipeline to make a point the record already makes.
-	// complaint, so the pipeline kept running while each moved; every module has moved since, and
+	// Before the runtime exists the pattern is accepted as it always was.
 	// the exception would only let one move back.
 	if m.Module != catalogue.RuntimeModule {
 		if why := catalogue.ToolContainerOnTheRuntime(m, from.Against); why != "" {
 			runtime, err := i.hasModule(ctx, catalogue.RuntimeModule)
@@ -91,7 +90,13 @@ func (i *Inventory) RegisterModule(ctx context.Context, m catalogue.Manifest, fr
 				return err
 			}
 			if runtime {
-				return fmt.Errorf("%s is not registered: %s", m.Module, why)
+				already, err := i.registeredInThatShape(ctx, m.Module)
 				if err != nil {
 					return err
 				}
 				if !already {
 					return fmt.Errorf("%s is not registered: %s", m.Module, why)
 				}
 			}
 		}
 	}
@@ -147,6 +152,26 @@ func (i *Inventory) RegisterModule(ctx context.Context, m catalogue.Manifest, fr
 	return nil
 }
 // registeredInThatShape is whether the catalogue already holds this module as a tools container on
 // the runtime's image — judged from the manifest it holds and what that module's newest build stood
 // on, the same two things the gate judges a new registration by. False for a module the catalogue
 // does not hold.
 func (i *Inventory) registeredInThatShape(ctx context.Context, name string) (bool, error) {
 	held, err := i.Catalogue(ctx)
 	if err != nil {
 		return false, err
 	}
 	stored, has := held[name]
 	if !has {
 		return false, nil
 	}
 	against, err := i.BuiltAgainst(ctx)
 	if err != nil {
 		return false, err
 	}
 	return catalogue.ToolContainerOnTheRuntime(stored, against[name]) != "", nil
 }
 // hasModule is whether the catalogue holds a module of that name.
 func (i *Inventory) hasModule(ctx context.Context, name string) (bool, error) {
 	var one int
@@ -688,9 +688,9 @@ func TestRegisteringWithoutProvenanceKeepsTheSeat(t *testing.T) {
 // Once the node's tool runtime is in the catalogue, a module serving its tools from a container
 // built on the runtime's image is refused at registration, naming the record (novox/hq ADR 0175,
-// to-be 38 WP2.4) — for every module, since every module has moved (WP4b's last step; WP3's
+// to-be 38 WP2.4) — for a module new to the catalogue or one that had moved away from it; a module
-// amendment let one already standing in that shape be rebuilt while each moved). Before the
+// already standing in that shape is rebuilt as before, so the catalogue's pipeline keeps running
-// runtime, it is accepted as it always was — so a
+// while each moves (WP3's amendment). Before the runtime, it is accepted as it always was — so a
 // mesh converts in the order the design says and nothing is refused before there is anything to
 // move to.
 func TestAToolContainerIsRefusedOnceTheRuntimeIsRegistered(t *testing.T) {
@@ -715,11 +715,11 @@ func TestAToolContainerIsRefusedOnceTheRuntimeIsRegistered(t *testing.T) {
 		t.Fatal(err)
 	}
-	// **A module already registered in that shape is refused too** (WP4b's last step): every module
+	// **A module already registered in that shape is rebuilt without complaint** (to-be 38 WP2.4 as
-	// has moved, and a rebuild in the old shape is one moving back.
+	// amended by WP3): some thirty of them stand the day the runtime arrives, and each moves in its
-	if err := inv.RegisterModule(ctx, filter, Source{Repository: "/r", Against: stoodOn}); err == nil ||
+	// own change. The gate is against the pattern spreading, not against the pipeline running.
-		!strings.Contains(err.Error(), "ADR 0175") {
+	if err := inv.RegisterModule(ctx, filter, Source{Repository: "/r", Against: stoodOn}); err != nil {
-		t.Fatalf("a rebuild of a module in the old pattern was registered beside the runtime: %v", err)
+		t.Fatalf("a rebuild of a module that already had the pattern was refused: %v", err)
 	}
 	// A module new to the catalogue in that shape is refused, naming the record.
 	newcomer := filter
@@ -1,242 +0,0 @@
 package inventory
 import (
 	"context"
 	"encoding/json"
 	"strings"
 )
 // What the artifact store keeps, and what it may let go (novox/hq ADR 0189, issue 108).
 //
 // The store has never collected anything: every build pushes another layer set and nothing has
 // ever removed one. The registry's own answer — collect what no tag names — is wrong here, because
 // the mesh pushes each artifact under one moving tag and pins machines by digest, so every build
 // but the newest is untagged and some machine may still be running it.
 //
 // **So the mesh decides, from its own records, and it never has to look in the store to do it.**
 // It has never put anything there it did not record, which means every digest it could remove is
 // already in a build row. A digest the mesh did not record making is therefore never named here —
 // not as a safety margin but as the rule restated, and it is what keeps the sweep away from the
 // images genesis pushed before any record existed (04-ISSUES/102, F4).
 // KeptBuilds is how many successful builds of each module keep their artifacts, counting the
 // newest. The newest is what the mesh hands a machine now; the four behind it are how far back a
 // release that turns out wrong can be taken.
 const KeptBuilds = 5
 // ToCollect is every artifact the mesh made, no longer keeps, and has not already collected.
 //
 // Three reasons an artifact stays, and nothing else is a reason:
 //
 //   - **a definition names it** — the reference appears in a module's recorded manifest, which is
 //     what the mesh would hand a machine now. No age limit: this is the floor;
 //   - **the mesh can still go back to it** — it is an artifact of one of the KeptBuilds most
 //     recent successful builds of its module;
 //   - it was already collected, in which case there is nothing left to do.
 //
 // Returned in a stated order so two runs over the same records ask for the same things in the
 // same sequence, which is what makes a failed sweep safe to simply run again.
 func (i *Inventory) ToCollect(ctx context.Context) ([]string, error) {
 	keep, err := i.keptReferences(ctx)
 	if err != nil {
 		return nil, err
 	}
 	rows, err := i.store.Pool().Query(ctx,
 		// Every artifact of every successful build, oldest first, minus what has already been
 		// collected. A failed build published nothing, so it names nothing to remove.
 		`select b.made
 		   from build b
 		  where b.failed = '' and b.module is not null and b.module <> ''
 		  order by b.at asc, b.id asc`)
 	if err != nil {
 		return nil, err
 	}
 	defer rows.Close()
 	collected, err := i.alreadyCollected(ctx)
 	if err != nil {
 		return nil, err
 	}
 	seen := map[string]bool{}
 	var out []string
 	for rows.Next() {
 		var raw []byte
 		if err := rows.Scan(&raw); err != nil {
 			return nil, err
 		}
 		var made []Artifact
 		if err := json.Unmarshal(raw, &made); err != nil {
 			// One unreadable record must not stop the rest being collected — and an artifact this
 			// row named is simply not offered, which errs toward keeping.
 			continue
 		}
 		for _, a := range made {
 			if a.Reference == "" || keep[a.Reference] || collected[a.Reference] || seen[a.Reference] {
 				continue
 			}
 			seen[a.Reference] = true
 			out = append(out, a.Reference)
 		}
 	}
 	return out, rows.Err()
 }
 // keptReferences is every artifact reference the mesh still keeps, for either of the two reasons.
 func (i *Inventory) keptReferences(ctx context.Context) (map[string]bool, error) {
 	keep := map[string]bool{}
 	// **Whatever a definition the mesh holds names.** Read as text rather than by walking the
 	// resource shapes: a reference may be a container's image, a bundle's source, or a field some
 	// later kind of resource grows, and what matters is only whether the mesh could hand this
 	// string to a machine. A manifest that mentions it is a manifest that might.
 	manifests, err := i.store.Pool().Query(ctx, `select manifest::text from module where manifest is not null`)
 	if err != nil {
 		return nil, err
 	}
 	defer manifests.Close()
 	var named []string
 	for manifests.Next() {
 		var text string
 		if err := manifests.Scan(&text); err != nil {
 			return nil, err
 		}
 		named = append(named, text)
 	}
 	if err := manifests.Err(); err != nil {
 		return nil, err
 	}
 	// The KeptBuilds most recent successful builds of each module, whole.
 	recent, err := i.store.Pool().Query(ctx,
 		`select made from (
 		    select made, row_number() over (partition by module order by at desc, id desc) as back
 		      from build
 		     where failed = '' and module is not null and module <> ''
 		 ) ranked where back <= $1`, KeptBuilds)
 	if err != nil {
 		return nil, err
 	}
 	defer recent.Close()
 	for recent.Next() {
 		var raw []byte
 		if err := recent.Scan(&raw); err != nil {
 			return nil, err
 		}
 		var made []Artifact
 		if err := json.Unmarshal(raw, &made); err != nil {
 			continue
 		}
 		for _, a := range made {
 			if a.Reference != "" {
 				keep[a.Reference] = true
 			}
 		}
 	}
 	if err := recent.Err(); err != nil {
 		return nil, err
 	}
 	// And anything a manifest mentions. Done after the recent set so the scan runs over the
 	// candidates rather than over every reference ever recorded: a manifest holds a reference
 	// composed with the store's address or kept bare, so the search is for the digest within it.
 	if len(named) > 0 {
 		all, err := i.everyReferenceMade(ctx)
 		if err != nil {
 			return nil, err
 		}
 		for _, reference := range all {
 			if keep[reference] {
 				continue
 			}
 			digest := digestIn(reference)
 			if digest == "" {
 				// Not something the store holds by digest; nothing here can speak for it, so it
 				// is kept rather than guessed about.
 				keep[reference] = true
 				continue
 			}
 			for _, text := range named {
 				if strings.Contains(text, digest) {
 					keep[reference] = true
 					break
 				}
 			}
 		}
 	}
 	return keep, nil
 }
 // everyReferenceMade is every artifact reference any successful build recorded.
 func (i *Inventory) everyReferenceMade(ctx context.Context) ([]string, error) {
 	rows, err := i.store.Pool().Query(ctx,
 		`select made from build where failed = '' and module is not null and module <> ''`)
 	if err != nil {
 		return nil, err
 	}
 	defer rows.Close()
 	seen := map[string]bool{}
 	var out []string
 	for rows.Next() {
 		var raw []byte
 		if err := rows.Scan(&raw); err != nil {
 			return nil, err
 		}
 		var made []Artifact
 		if err := json.Unmarshal(raw, &made); err != nil {
 			continue
 		}
 		for _, a := range made {
 			if a.Reference == "" || seen[a.Reference] {
 				continue
 			}
 			seen[a.Reference] = true
 			out = append(out, a.Reference)
 		}
 	}
 	return out, rows.Err()
 }
 // digestIn is the `sha256:<hex>` a reference names, empty when it names none.
 func digestIn(reference string) string {
 	for _, marker := range []string{"@sha256:", "/sha256:"} {
 		if _, after, ok := strings.Cut(reference, marker); ok {
 			return "sha256:" + after
 		}
 	}
 	return ""
 }
 // alreadyCollected is what the store has already been asked to let go.
 func (i *Inventory) alreadyCollected(ctx context.Context) (map[string]bool, error) {
 	rows, err := i.store.Pool().Query(ctx, `select reference from artifact_collected`)
 	if err != nil {
 		return nil, err
 	}
 	defer rows.Close()
 	out := map[string]bool{}
 	for rows.Next() {
 		var reference string
 		if err := rows.Scan(&reference); err != nil {
 			return nil, err
 		}
 		out[reference] = true
 	}
 	return out, rows.Err()
 }
 // MarkCollected records that the store no longer holds these.
 //
 // **A store that answered "not found" is recorded too.** The outcome wanted is that the artifact
 // is gone, and it is; retrying it every sweep for ever is the failure this table exists to
 // prevent. Only a store that could not be reached, or refused, leaves a reference unmarked — and
 // then the next sweep asks again, which is what should happen.
 func (i *Inventory) MarkCollected(ctx context.Context, references []string) error {
 	for _, reference := range references {
 		if _, err := i.store.Pool().Exec(ctx,
 			`insert into artifact_collected (reference) values ($1) on conflict (reference) do nothing`,
 			reference); err != nil {
 			return err
 		}
 	}
 	return nil
 }
@@ -1,147 +0,0 @@
 package inventory
 import (
 	"context"
 	"fmt"
 	"testing"
 	"github.com/novox/mesh-controller/internal/catalogue"
 )
 // What the store keeps, and what it may let go (novox/hq ADR 0189, issue 108).
 //
 // The store has collected nothing since it was raised, and the registry's own answer — collect
 // what no tag names — would delete images machines are running, because the mesh pushes under one
 // moving tag and pins by digest. So the rule is the mesh's, read from its own records, and these
 // are the three reasons an artifact stays and the one reason it goes.
 // ref is an artifact reference as the mesh records one.
 func ref(module, artifact string, n int) string {
 	return fmt.Sprintf("%s%s/%s@sha256:%064x", catalogue.ArtifactStoreScheme, module, artifact, n)
 }
 // built records one successful build of a module publishing one image.
 func built(t *testing.T, inv *Inventory, id, module string, n int) string {
 	t.Helper()
 	reference := ref(module, "app", n)
 	b := aBuild(id, module, "")
 	b.Made = []Artifact{{Name: "app", Kind: "image", Reference: reference}}
 	if err := inv.RecordBuild(context.Background(), b); err != nil {
 		t.Fatal(err)
 	}
 	return reference
 }
 func TestTheStoreKeepsTheRecentBuildsAndLetsGoOfTheRest(t *testing.T) {
 	inv := fresh(t)
 	ctx := context.Background()
 	// Eight builds of one module, oldest first. Five are kept — the newest, and the four a
 	// release that turns out wrong can be taken back to.
 	var made []string
 	for i := 1; i <= 8; i++ {
 		made = append(made, built(t, inv, fmt.Sprintf("b%02d", i), "web", i))
 	}
 	go_, err := inv.ToCollect(ctx)
 	if err != nil {
 		t.Fatal(err)
 	}
 	want := made[:3] // the three oldest
 	if len(go_) != len(want) {
 		t.Fatalf("offered %v to collect; want the %d oldest of %d", go_, len(want), len(made))
 	}
 	for i := range want {
 		if go_[i] != want[i] {
 			t.Fatalf("offered %v; want %v — and in that order, so a failed sweep is safe to run again",
 				go_, want)
 		}
 	}
 }
 func TestADefinitionNamingAnArtifactKeepsItHoweverOldItIs(t *testing.T) {
 	// The floor: no age limit. A module recorded at an older commit still names what the mesh
 	// would hand a machine now, and that is what must not be collected out from under it.
 	inv := fresh(t)
 	ctx := context.Background()
 	var made []string
 	for i := 1; i <= 8; i++ {
 		made = append(made, built(t, inv, fmt.Sprintf("b%02d", i), "web", i))
 	}
 	oldest := made[0]
 	// A definition the mesh holds, whose container runs that oldest image.
 	m := catalogue.Manifest{Module: "web", Version: "1", Resources: []map[string]any{{
 		"id": "app", "type": "container", "name": "web", "image": oldest,
 	}}}
 	if err := inv.RegisterModule(ctx, m, Source{Repository: "https://forge.invalid/web.git"}); err != nil {
 		t.Fatal(err)
 	}
 	go_, err := inv.ToCollect(ctx)
 	if err != nil {
 		t.Fatal(err)
 	}
 	for _, reference := range go_ {
 		if reference == oldest {
 			t.Fatalf("the mesh offered to collect %s, which a definition it holds names", oldest)
 		}
 	}
 	if len(go_) != 2 {
 		t.Fatalf("offered %v; want the two oldest that nothing names", go_)
 	}
 }
 func TestWhatHasBeenCollectedIsNotOfferedAgain(t *testing.T) {
 	// Without this the sweep reissues a delete for every artifact it has ever collected, every
 	// time it runs, for ever — a number of requests that grows with the mesh's whole history.
 	inv := fresh(t)
 	ctx := context.Background()
 	for i := 1; i <= 7; i++ {
 		built(t, inv, fmt.Sprintf("b%02d", i), "web", i)
 	}
 	first, err := inv.ToCollect(ctx)
 	if err != nil {
 		t.Fatal(err)
 	}
 	if len(first) != 2 {
 		t.Fatalf("offered %v, want two", first)
 	}
 	if err := inv.MarkCollected(ctx, first); err != nil {
 		t.Fatal(err)
 	}
 	again, err := inv.ToCollect(ctx)
 	if err != nil {
 		t.Fatal(err)
 	}
 	if len(again) != 0 {
 		t.Fatalf("offered %v again after collecting it", again)
 	}
 }
 func TestAFailedBuildNamesNothingToCollectAndEachModuleIsCountedOnItsOwn(t *testing.T) {
 	inv := fresh(t)
 	ctx := context.Background()
 	// A failed build published nothing, so it is neither kept nor collected — and it must not
 	// count against the module's five.
 	for i := 1; i <= 6; i++ {
 		built(t, inv, fmt.Sprintf("w%02d", i), "web", i)
 	}
 	if err := inv.RecordBuild(ctx, aBuild("w99", "web", "the recipe would not build")); err != nil {
 		t.Fatal(err)
 	}
 	// And a second module with three builds keeps all three: five each, not five between them.
 	for i := 1; i <= 3; i++ {
 		built(t, inv, fmt.Sprintf("d%02d", i), "db", 100+i)
 	}
 	go_, err := inv.ToCollect(ctx)
 	if err != nil {
 		t.Fatal(err)
 	}
 	if len(go_) != 1 || go_[0] != ref("web", "app", 1) {
 		t.Fatalf("offered %v; want only web's oldest — db's three are all within its five", go_)
 	}
 }
@@ -1,23 +0,0 @@
 -- What the artifact store no longer keeps (novox/hq ADR 0189, issue 108).
 --
 -- The mesh removes from its store only what it put there and can account for: every digest it
 -- could remove is already in a build record, so the sweep reads its own records rather than
 -- enumerating the store. What it does not get from those records is whether it has already
 -- removed something -- `build.made` says what that build published, for ever, which is history
 -- and not an index of what is on disk.
 --
 -- Without this the sweep would reissue a delete for every artifact it has ever collected, every
 -- time it runs, and each one would answer 404 -- a number of requests that grows with the mesh's
 -- whole history and never shrinks.
 --
 -- Keyed by the reference as the mesh records it (`artifact-store://<module>/<artifact>@sha256:…`),
 -- because that is the identity the record uses everywhere else. Not a foreign key to build: two
 -- builds can publish the same digest (the same source built twice produces the same bytes), and
 -- what is collected is the artifact, not the attempt that made it.
 create table artifact_collected (
    reference text        primary key,
    -- When the store answered. Kept so a reader of an old build record can tell "this artifact is
    -- gone" from "this artifact was never there", which are different kinds of surprise.
    at        timestamptz not null default now()
 );