The console's build tool has the command's three shapes: a repository, a base (--on), everything behind

Rebuilding the forty-three modules that stand on the runtime image took forty-three tool calls
because the seat verb only knew a repository. `on` rebuilds every module built on a base, `behind`
rebuilds what is older than its source, both asked and not waited for, the daemon taking each result
in (issue 176). Nothing is required any more; a build naming nothing is refused by the command's usage.

cmd/mesh-builder/main.go

@@ -148,20 +148,34 @@ func answer(ctx context.Context, publisher builder.Publisher, on, workspace stri
 	// it either finishes or fails is indistinguishable from one that never arrived — which cost a long
 	// diagnosis against a running mesh, chasing "the handler never fired" when the truth was only that
 	// the handler said nothing until the end.
-	fmt.Fprintf(os.Stderr, "a build request arrived for %s\n", request.Repository)
+	fmt.Fprintf(os.Stderr, "a build request arrived for %s (%s)\n", request.Repository, request.ID)
+
+	// **Everything a build says goes two ways**: to stderr, as always, and onto the bus as the
+	// role's own events under the build's id (novox/hq ADR 0157) — so whoever asked, and anybody
+	// watching, reads the same lines this container's log holds, live, and after the fact from the
+	// stream. Said first, before anything runs, so a build that hangs is one that visibly started.
+	say := func(step, message string) {
+		fmt.Fprintf(os.Stderr, "  [%s] %s\n", step, message)
+		work.Say(step, message)
+	}
+	builder.Said = say
+	defer func() { builder.Said = nil }()
+	if err := work.Began(ctx); err != nil {
+		fmt.Fprintf(os.Stderr, "cannot say a build started: %v\n", err)
+	}
 
 	result := link.BuildResult{
 		ID: request.ID, Repository: request.Repository, Path: request.Path,
-		Ref: request.Ref, On: on,
+		Ref: request.Ref, On: on, Source: request.Source,
 	}
-	fmt.Fprintf(os.Stderr, "building %s", request.Repository)
+	what := "building " + request.Repository
 	if request.Path != "" {
-		fmt.Fprintf(os.Stderr, " at %s", request.Path)
+		what += " at " + request.Path
 	}
 	if request.Ref != "" {
-		fmt.Fprintf(os.Stderr, " at %s", request.Ref)
+		what += " on " + request.Ref
 	}
-	fmt.Fprintln(os.Stderr)
+	say("build", what)
 
 	npmrc, err := packagesFrom()
 	var built builder.Result
@@ -171,16 +185,13 @@ func answer(ctx context.Context, publisher builder.Publisher, on, workspace stri
 		// after a clone that then fails at npm ci.
 		built, err = builder.Build(ctx, builder.Command, publisher,
 			request.Repository, request.Path, request.Ref, workspace, request.Held, npmrc,
-			forgeFrom(),
+			forgeFrom(), say, request.Seats)
-			func(step, message string) {
-				fmt.Fprintf(os.Stderr, "  [%s] %s\n", step, message)
-			})
 	}
 	if err != nil {
 		// A failure is a result. A build that fails and says nothing is indistinguishable from a
 		// builder that is not running, and those want completely different responses.
 		result.Failed = err.Error()
-		fmt.Fprintf(os.Stderr, "  failed: %v\n", err)
+		say("failed", err.Error())
 	} else {
 		manifest, marshalErr := json.Marshal(built.Manifest)
 		if marshalErr != nil {
@@ -197,7 +208,7 @@ func answer(ctx context.Context, publisher builder.Publisher, on, workspace stri
 			for _, r := range built.Read {
 				result.Read = append(result.Read, link.ReadRepository{Repository: r.Repository, Ref: r.Ref})
 			}
-			fmt.Fprintf(os.Stderr, "  built %s from %s\n", built.Manifest.Module, short(built.Commit))
+			say("built", built.Manifest.Module+" from "+short(built.Commit))
 		}
 	}
 

cmd/mesh-controller/adopting_test.go

@@ -91,6 +91,10 @@ func reportsReaching(t *testing.T, open *stores, reachable []link.Reach, held ..
 	if _, err := (link.Enrolment{Inventory: open.inventory}).Heard(ctx, link.Report{
 		Node: "anchor", Applied: []string{"hello-web.x"}, Declared: digestOf(body),
 		Firewall: "ufw", Held: held, Reachable: reachable,
+		// A machine says which of its links face outside on every apply (novox/hq ADR 0140), and a
+		// filter is not sent to one that has not. The anchor reports one, as a real host does; this
+		// fixture lacked it from 2026-09-28 and nothing ran the test (issue 177).
+		Outward: []string{"eth0"},
 	}); err != nil {
 		t.Fatal(err)
 	}

cmd/mesh-controller/build.go

@@ -10,6 +10,8 @@ import (
 	"strings"
 	"time"
 
+	"github.com/nats-io/nats.go"
+
 	"github.com/novox/mesh-controller/internal/broker"
 	"github.com/novox/mesh-controller/internal/catalogue"
 	"github.com/novox/mesh-controller/internal/inventory"
@@ -175,10 +177,14 @@ func buildFrom(result link.BuildResult) inventory.Build {
 func buildsCommand(ctx context.Context, args []string) error {
 	set := flag.NewFlagSet("builds", flag.ContinueOnError)
 	limit := set.Int("n", 20, "how many to show")
+	logOf := set.String("log", "", "a build's id: print what the build machine said, line by line")
 	positionals, err := parseAround(set, args)
 	if err != nil {
 		return err
 	}
+	if *logOf != "" {
+		return buildLog(ctx, *logOf)
+	}
 	module := ""
 	if len(positionals) == 1 {
 		module = positionals[0]
@@ -219,8 +225,8 @@ func buildsCommand(ctx context.Context, args []string) error {
 		if !b.Worked() {
 			outcome = "failed"
 		}
-		fmt.Printf("%-18s %-14s %-10s %s\n",
+		fmt.Printf("%-18s %-14s %-10s %s  %s\n",
-			what, outcome, b.On, b.At.Local().Format("2006-01-02 15:04"))
+			what, outcome, b.On, b.At.Local().Format("2006-01-02 15:04"), b.ID)
 		fmt.Printf("    %s", b.Repository)
 		if b.Ref != "" {
 			fmt.Printf(" at %s", b.Ref)
@@ -408,11 +414,14 @@ func buildOne(ctx context.Context, source buildSource, path, ref string, wait ti
 		Path:       path,
 		Ref:        ref,
 		Held:       heldBy(ctx),
+		Seats:      seatBases(ctx),
 	}
 	fmt.Printf("asked for %s", source)
 	if source.Seat != "" {
 		fmt.Printf(" (%s)", repository)
 	}
+	// The id is how a person follows this build while it runs: `builds --log <id>`.
+	fmt.Printf(" as %s", request.ID)
 	if path != "" {
 		fmt.Printf(" at %s", path)
 	}
@@ -427,66 +436,91 @@ func buildOne(ctx context.Context, source buildSource, path, ref string, wait ti
 	}
 	defer ask.Close()
 
+	if wait == 0 {
+		// Asked and not waited for (novox/hq issue 176): the outcome is the role's event, and the
+		// controller takes it in — records the build, registers the module — whether or not anybody
+		// is still here. A tool call cannot hold a connection for the minutes a build takes; it
+		// follows the build by its id instead.
+		if err := ask.Ask(ctx, request); err != nil {
+			return err
+		}
+		fmt.Printf("asked, not waited for: `builds --log %s` follows it as it runs, and `builds` "+
+			"shows what came of it; the module is registered when the outcome comes\n", request.ID)
+		return nil
+	}
+
 	result, err := ask.Submit(ctx, request, wait)
 	if err != nil {
 		return err
 	}
 
-	// Kept before it is judged. A failed build that leaves no trace is indistinguishable from one
-	// nobody asked for, and the difference is the whole of whether somebody should be looking at
-	// something.
 	open, err := openStores(ctx)
 	if err != nil {
 		return err
 	}
 	defer open.Close()
-	inv := open.inventory
+	manifest, kept, err := takeIn(ctx, open.inventory, result)
-	kept := buildFrom(result)
+	if err != nil {
-	if err := inv.RecordBuild(ctx, kept); err != nil {
 		return err
 	}
-
-	if result.Failed != "" {
-		// The builder's own words. Wrapping them in something about the control plane would put
-		// two explanations between a person and a build log.
-		return fmt.Errorf("%s could not build %s:\n%s", result.On, result.Repository, result.Failed)
-	}
-
 	// Said as recorded: what each artifact is, not where this builder happened to push it.
 	for _, made := range kept.Made {
 		fmt.Printf("  %-12s %s %s\n", made.Name, made.Kind, made.Reference)
 	}
-
-	// Parsed with the same parser a hand-written manifest goes through. A second path would be a
-	// second thing to disagree about what a manifest is. The manifest as recorded, so the catalogue
-	// holds references by digest and path and every declaration composes the store's address in.
-	manifest, err := catalogue.ParseManifest(kept.Manifest)
-	if err != nil {
-		return fmt.Errorf("%s built %s and what came back is not a manifest: %w",
-			result.On, result.Repository, err)
-	}
-
-	// Recorded with where it came from, so "is this current?" is answerable without building it
-	// again (novox/hq ADR 0009). **For a source on a seat, as the path and the seat, never the URL
-	// just cloned** (ADR 0111): the URL is where the forge runs today, and recording it would put
-	// the forge's address back into every module built from it. The build log above keeps the URL,
-	// because that is what was cloned.
-	recorded := inventory.Source{
-		Repository: result.Repository, Path: result.Path, Ref: result.Ref,
-		BuiltFrom: result.Commit, Head: result.Commit,
-	}
-	if source.Seat != "" {
-		recorded.Repository, recorded.Seat = source.Repository, source.Seat
-	}
-	if err := inv.RegisterModule(ctx, manifest, recorded); err != nil {
-		return err
-	}
 	fmt.Printf("\n%s %s, built on %s from %s\n",
 		manifest.Module, manifest.Version, result.On, short(result.Commit))
 	fmt.Printf("  run `assign <node> %s` to put it somewhere\n", manifest.Module)
 	return nil
 }
 
+// takeIn is what the mesh does with a build's outcome, whoever hears it: the waiting command and
+// the daemon that follows the role's events both come here (novox/hq issue 176), so a build's
+// result reaches the catalogue whether or not the asker was still listening.
+//
+// Kept before it is judged. A failed build that leaves no trace is indistinguishable from one
+// nobody asked for, and the difference is the whole of whether somebody should be looking at
+// something. Then parsed with the same parser a hand-written manifest goes through — a second path
+// would be a second thing to disagree about what a manifest is — and registered with where it came
+// from: **for a source on a seat, as the path and the seat, never the URL just cloned** (ADR 0111),
+// which the request carried and the outcome echoes. A definition naming an installation is refused
+// here, where it would enter the catalogue; the build stays recorded and the refusal says which.
+//
+// Idempotent: the same outcome taken in twice registers the same module twice, which is one row
+// written with the same values.
+func takeIn(ctx context.Context, inv *inventory.Inventory, result link.BuildResult) (
+	catalogue.Manifest, inventory.Build, error) {
+	kept := buildFrom(result)
+	if err := inv.RecordBuild(ctx, kept); err != nil {
+		return catalogue.Manifest{}, kept, err
+	}
+	if result.Failed != "" {
+		// The builder's own words. Wrapping them in something about the control plane would put
+		// two explanations between a person and a build log.
+		return catalogue.Manifest{}, kept, fmt.Errorf("%s could not build %s:\n%s",
+			result.On, result.Repository, result.Failed)
+	}
+	manifest, err := catalogue.ParseManifest(kept.Manifest)
+	if err != nil {
+		return catalogue.Manifest{}, kept, fmt.Errorf("%s built %s and what came back is not a manifest: %w",
+			result.On, result.Repository, err)
+	}
+	recorded := inventory.Source{
+		Repository: result.Repository, Path: result.Path, Ref: result.Ref,
+		BuiltFrom: result.Commit, Head: result.Commit,
+	}
+	if result.Source != nil && result.Source.Seat != "" {
+		recorded.Repository, recorded.Seat = result.Source.Repository, result.Source.Seat
+	}
+	if err := namesNoInstallation(manifest); err != nil {
+		return manifest, kept, fmt.Errorf("%s built %s (%s), and the mesh does not register it: %w",
+			result.On, result.Repository, short(result.Commit), err)
+	}
+	if err := inv.RegisterModule(ctx, manifest, recorded); err != nil {
+		return manifest, kept, err
+	}
+	return manifest, kept, nil
+}
+
 // buildAndShow builds and prints the manifest without recording anything.
 func buildAndShow(ctx context.Context, source buildSource, path, ref string, wait time.Duration) error {
 	repository, err := cloneFrom(ctx, source)
@@ -513,7 +547,7 @@ func buildAndShow(ctx context.Context, source buildSource, path, ref string, wai
 	result, err := ask.Submit(ctx, link.BuildRequest{
 		ID:         fmt.Sprintf("%s-%d", "build", time.Now().UnixNano()),
 		Repository: repository, Path: path, Ref: ref,
-		Held: heldBy(ctx),
+		Held: heldBy(ctx), Seats: seatBases(ctx),
 	}, wait)
 	if err != nil {
 		return err
@@ -618,3 +652,57 @@ func askOver(_ *link.Server) (link.Builders, error) {
 	}
 	return link.BuildsOverNATS(address)
 }
+
+// buildLog prints everything a build machine said about one build, read back from the bus.
+//
+// **From the stream, not from a record** (novox/hq ADR 0157). A build's lines are the role's own
+// events under the build's id, retained with every other event; the mesh keeps no second copy. Read
+// with a consumer of its own that is gone when this returns, so nothing accumulates in the server
+// for the reading, and filtered by subject, so one build's lines are all that travel.
+func buildLog(ctx context.Context, id string) error {
+	address, err := broker.BusAddress()
+	if err != nil {
+		return err
+	}
+	js, err := broker.Dial(address)
+	if err != nil {
+		return fmt.Errorf("cannot reach the bus to read a build's log: %w", err)
+	}
+	defer js.Close()
+
+	sub, err := js.Context().PullSubscribe(link.BuildLog(id), "",
+		nats.BindStream(broker.EventsStream), nats.DeliverAll(), nats.AckNone())
+	if err != nil {
+		return fmt.Errorf("cannot read %s from the bus: %w", link.BuildLog(id), err)
+	}
+	defer func() { _ = sub.Unsubscribe() }()
+
+	printed := 0
+	for {
+		batch, err := sub.Fetch(200, nats.MaxWait(2*time.Second))
+		if err != nil && !errors.Is(err, nats.ErrTimeout) && !errors.Is(err, context.DeadlineExceeded) {
+			return fmt.Errorf("reading a build's log: %w", err)
+		}
+		for _, msg := range batch {
+			var line link.BuildLine
+			if err := json.Unmarshal(msg.Data, &line); err != nil {
+				fmt.Printf("  ? %s\n", string(msg.Data))
+				continue
+			}
+			at := line.At
+			if t, err := time.Parse(time.RFC3339Nano, line.At); err == nil {
+				at = t.Local().Format("15:04:05")
+			}
+			fmt.Printf("%s %4d [%s] %s\n", at, line.Seq, line.Step, line.Message)
+			printed++
+		}
+		if len(batch) < 200 {
+			break
+		}
+	}
+	if printed == 0 {
+		fmt.Printf("nothing on the bus for build %s: no build by that id in the last week, or a build "+
+			"machine older than this that said nothing while building\n", id)
+	}
+	return nil
+}

cmd/mesh-controller/build_test.go

@@ -0,0 +1,65 @@
+package main
+
+import (
+	"encoding/json"
+	"strings"
+	"testing"
+
+	"github.com/novox/mesh-controller/internal/link"
+)
+
+// A build's outcome is taken in the same way whoever hears it (novox/hq issue 176): recorded, and
+// the module registered with its source as the seat and path when the request said so — never the
+// URL. A definition naming an installation is recorded and not registered; a failure is recorded
+// and said.
+func TestABuildHeardIsRecordedAndRegistered(t *testing.T) {
+	open := aMesh(t)
+	ctx := t.Context()
+	manifest, _ := json.Marshal(map[string]any{"module": "shop", "version": "3"})
+	m, _, err := takeIn(ctx, open.inventory, link.BuildResult{
+		ID: "b-1", Repository: "http://forge.internal:20000/novox/shop.git", Path: "modules/shop",
+		Ref: "main", On: "anchor", Commit: "abcdef0123", Manifest: manifest,
+		Source: &link.SourceOnSeat{Seat: "git", Repository: "novox/shop"},
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if m.Module != "shop" {
+		t.Fatalf("registered %q", m.Module)
+	}
+	shelf, err := open.inventory.Catalogue(ctx)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if _, held := shelf["shop"]; !held {
+		t.Fatal("the module a heard build produced is not in the catalogue")
+	}
+	src, err := open.inventory.SourceOf(ctx, "shop")
+	if err != nil || src.Seat != "git" || src.Repository != "novox/shop" || src.BuiltFrom != "abcdef0123" {
+		t.Fatalf("the source is the seat and the path, never the URL: %+v %v", src, err)
+	}
+	builds, err := open.inventory.Builds(ctx, "shop", 5)
+	if err != nil || len(builds) != 1 || builds[0].ID != "b-1" {
+		t.Fatalf("the build is not recorded once: %v %v", builds, err)
+	}
+
+	named, _ := json.Marshal(map[string]any{"module": "idp", "version": "1", "resources": []any{
+		map[string]any{"id": "server", "type": "container", "image": "x@sha256:aa",
+			"env": map[string]any{"KC_HOSTNAME": "https://login.mesh-one.be"}}}})
+	_, _, err = takeIn(ctx, open.inventory, link.BuildResult{
+		ID: "b-2", Repository: "/r", On: "anchor", Commit: "0123456789", Manifest: named})
+	if err == nil || !strings.Contains(err.Error(), "does not register it") {
+		t.Fatalf("a definition naming an installation was taken in: %v", err)
+	}
+	if shelf, _ := open.inventory.Catalogue(ctx); shelf["idp"].Module != "" {
+		t.Fatal("the refused module was registered anyway")
+	}
+	if builds, _ := open.inventory.Builds(ctx, "idp", 5); len(builds) != 1 {
+		t.Fatalf("the refused build was not recorded: %v", builds)
+	}
+
+	_, _, err = takeIn(ctx, open.inventory, link.BuildResult{ID: "b-3", Repository: "/r", On: "anchor", Failed: "no compiler"})
+	if err == nil || !strings.Contains(err.Error(), "no compiler") {
+		t.Fatalf("a failure is said in the builder's words: %v", err)
+	}
+}

cmd/mesh-controller/check.go

@@ -30,6 +30,7 @@ func moduleCheck(paths []string, out io.Writer) error {
 			"manifest of a repository together so the rules between them are checked too")
 	}
 	shelf := catalogue.Shelf{}
+	faulted := map[string]bool{}
 	failed := 0
 	for _, path := range paths {
 		raw, err := os.ReadFile(path)
@@ -50,6 +51,15 @@ func moduleCheck(paths []string, out io.Writer) error {
 			failed++
 			continue
 		}
+		// A definition names no installation (novox/hq ADR 0112, ADR 0155): judged here, in the
+		// catalogue-wide test, and at registration, which refuses in the same words.
+		if named := catalogue.InstallationProblems(m); len(named) > 0 {
+			for _, p := range named {
+				fmt.Fprintf(out, "%s: %s\n", path, p)
+			}
+			failed += len(named)
+			faulted[m.Module] = true
+		}
 		shelf[m.Module] = m
 	}
 
@@ -70,6 +80,9 @@ func moduleCheck(paths []string, out io.Writer) error {
 	sort.Strings(names)
 	for _, name := range names {
 		m := shelf[name]
+		if faulted[name] {
+			continue
+		}
 		fmt.Fprintf(out, "%s: ok", name)
 		if n := len(m.Tools); n > 0 {
 			fmt.Fprintf(out, ", %d tool(s)", n)

cmd/mesh-controller/check_test.go

@@ -5,6 +5,8 @@ import (
 	"os"
 	"path/filepath"
 	"strings"
+
+	"github.com/novox/mesh-controller/internal/catalogue"
 	"testing"
 )
 
@@ -67,3 +69,26 @@ func TestModuleCheckPassesTheCatalogue(t *testing.T) {
 		t.Fatalf("the catalogue does not pass its own check: %v\n%s", err, out.String())
 	}
 }
+
+func TestRegistrationRefusesADefinitionNamingAnInstallation(t *testing.T) {
+	// novox/hq ADR 0155: the check moves to registration once the catalogue passes it. Both
+	// ways in — `module add` and a build's result — go through this, and a name declared on
+	// purpose passes with its reason.
+	named := catalogue.Manifest{Module: "idp", Resources: []map[string]any{
+		{"id": "server", "type": "container", "image": "x@sha256:aa",
+			"env": map[string]any{"KC_HOSTNAME": "https://login.mesh-one.be"}},
+	}}
+	err := namesNoInstallation(named)
+	if err == nil || !strings.Contains(err.Error(), "login.mesh-one.be") ||
+		!strings.Contains(err.Error(), catalogue.NamesOnPurpose) {
+		t.Fatalf("a definition naming an installation is refused with the name and the way out; got %v", err)
+	}
+	meant := catalogue.Manifest{Module: "site", Resources: []map[string]any{
+		{"id": "server", "type": "container", "image": "registry.mesh-one.be/org/site@sha256:cc",
+			catalogue.NamesOnPurpose: map[string]any{
+				"registry.mesh-one.be": "built outside the mesh until its repository is a build source here"}},
+	}}
+	if err := namesNoInstallation(meant); err != nil {
+		t.Fatalf("a name declared on purpose passes; got %v", err)
+	}
+}

cmd/mesh-controller/main.go

@@ -172,6 +172,8 @@ func usage() {
   upgrade <name> record          ...record that they are behind, and send nothing
   status [--json]                what is wrong, what is quiet, and what is out of date
   seats [--json]                 every seat this mesh defines, what it delivers, and who holds it
+  seat rename <from> <to>        rename a seat; its former name still resolves (ADR 0122)
+  seat <name> --to <node>/<module>   hand a seat to that assignment as one act; never empty in between (ADR 0131)
   board [--listen ADDR]          the same three questions, as a page that holds nothing
   api --issuer URL [--listen A]  assign and unassign over http, for a surface that is not here
   assign <node> <module>         put a module on a node
@@ -241,6 +243,21 @@ func parseAround(set *flag.FlagSet, args []string) ([]string, error) {
 	}
 }
 
+// Built is the daemon hearing a build's outcome on the bus — its own asking, an announcement's, or
+// a tool's that did not wait (novox/hq issue 176) — and taking it in: recorded, and the module
+// registered, the same as the waiting command does. Said either way, so the daemon's log tells what
+// became of a build nobody was watching.
 func (b builds) Built(ctx context.Context, result link.BuildResult) error {
-	return b.inv.RecordBuild(ctx, buildFrom(result))
+	manifest, _, err := takeIn(ctx, b.inv, result)
+	switch {
+	case err != nil && result.Failed != "":
+		fmt.Printf("%s: %v\n", result.ID, err)
+		return nil
+	case err != nil:
+		fmt.Printf("%s: heard and recorded, and not registered: %v\n", result.ID, err)
+		return nil
+	}
+	fmt.Printf("%s: %s %s registered, built on %s from %s\n",
+		result.ID, manifest.Module, manifest.Version, result.On, short(result.Commit))
+	return nil
 }

cmd/mesh-controller/modules.go

@@ -113,6 +113,9 @@ func moduleCommand(ctx context.Context, args []string) error {
 		if err != nil {
 			return err
 		}
+		if err := namesNoInstallation(m); err != nil {
+			return err
+		}
 		if err := inv.RegisterModule(ctx, m, from); err != nil {
 			return err
 		}
@@ -581,6 +584,14 @@ func issueOnTheNewBus(ctx context.Context, inv *inventory.Inventory, m catalogue
 // (`rollout mint`, design 28 task 5.2) rather than the one in this process's environment.
 func issueWith(ctx context.Context, inv *inventory.Inventory, m catalogue.Manifest,
 	node, busAddress string, known broker.Broker, reachable, user, password string) error {
+	// The seats this module claims, with the verbs each promises (novox/hq ADR 0159): the runtime
+	// serves a claimed seat's verbs with its tools of the same name, and the bus admits only the
+	// holder's subscription — so the runtime tries each claim and the grant decides. Written here
+	// because this file is the one thing the mesh writes that the runtime reads before it speaks.
+	claims, err := claimsFor(ctx, inv, m)
+	if err != nil {
+		return err
+	}
 	held, err := json.Marshal(struct {
 		URL         string        `json:"url"`
 		Fingerprint string        `json:"fingerprint,omitempty"`
@@ -588,9 +599,10 @@ func issueWith(ctx context.Context, inv *inventory.Inventory, m catalogue.Manife
 		Module      string        `json:"module"`
 		User        string        `json:"user"`
 		Password    string        `json:"password"`
+		Claims      []seatClaimed `json:"claims,omitempty"`
 	}{
 		URL: "nats://" + reachable, Fingerprint: known.Fingerprint,
-		Node: node, Module: m.Module, User: user, Password: password,
+		Node: node, Module: m.Module, User: user, Password: password, Claims: claims,
 	})
 	if err != nil {
 		return err
@@ -662,3 +674,51 @@ func whereItComesFrom(repository, ref, commit, path string, self bool) (inventor
 	}
 	return from, nil
 }
+
+// namesNoInstallation is the mesh refusing a definition that names an installation, at the moment
+// it would enter the catalogue (novox/hq ADR 0112, ADR 0155). `module check` says the same thing
+// earlier, where the author is; this is the last moment the mesh can still say no, and a
+// definition that got past the check — written elsewhere, or checked by nobody — is refused here
+// in the same words. A name meant on purpose is declared with its reason and passes.
+func namesNoInstallation(m catalogue.Manifest) error {
+	named := catalogue.InstallationProblems(m)
+	if len(named) == 0 {
+		return nil
+	}
+	return fmt.Errorf("%s names an installation, and a definition names none — declare a name meant "+
+		"on purpose under %s with its reason, or take it out:\n  - %s",
+		m.Module, catalogue.NamesOnPurpose, strings.Join(named, "\n  - "))
+}
+
+// seatClaimed is one seat a module claims, as its runtime needs it: the name, the scope (a
+// node-scoped seat's verb carries the machine, design 33 §4) and the verbs the seat promises.
+type seatClaimed struct {
+	Seat   string   `json:"seat"`
+	Scope  string   `json:"scope"`
+	Serves []string `json:"serves,omitempty"`
+}
+
+// claimsFor joins a module's claims with the seats' protocols from the mesh's records.
+func claimsFor(ctx context.Context, inv *inventory.Inventory, m catalogue.Manifest) ([]seatClaimed, error) {
+	if len(m.Claims) == 0 {
+		return nil, nil
+	}
+	seats, err := inv.Seats(ctx)
+	if err != nil {
+		return nil, err
+	}
+	byName := map[string]catalogue.Seat{}
+	for _, s := range seats {
+		byName[s.Name] = s
+	}
+	var out []seatClaimed
+	for _, c := range m.Claims {
+		claimed := seatClaimed{Seat: c.Name, Scope: c.At()}
+		if s, known := byName[c.Name]; known {
+			claimed.Scope = s.Scope
+			claimed.Serves = catalogue.VerbNames(s.Serves)
+		}
+		out = append(out, claimed)
+	}
+	return out, nil
+}

cmd/mesh-controller/modules_test.go

@@ -11,7 +11,7 @@ import (
 // A module that declares none is refused before the account exists, so the bus never carries an
 // account nothing reads (novox/hq 04-ISSUES/078).
 func TestAModuleWithNoBrokerSecretCannotBeIssued(t *testing.T) {
-	err := mayIssue(catalogue.Manifest{Module: "step-ca", OwnSecrets: map[string]string{"password": "/run/password"}})
+	err := mayIssue(catalogue.Manifest{Module: "step-ca", OwnSecrets: catalogue.OwnSecrets{"password": {Path: "/run/password"}}})
 	if err == nil {
 		t.Fatal("a module with no broker own secret was issued an account")
 	}
@@ -20,7 +20,7 @@ func TestAModuleWithNoBrokerSecretCannotBeIssued(t *testing.T) {
 			t.Errorf("the refusal does not say %q: %v", want, err)
 		}
 	}
-	if err := mayIssue(catalogue.Manifest{Module: "redis", OwnSecrets: map[string]string{"broker": "/run/broker"}}); err != nil {
+	if err := mayIssue(catalogue.Manifest{Module: "redis", OwnSecrets: catalogue.OwnSecrets{"broker": {Path: "/run/broker"}}}); err != nil {
 		t.Errorf("a module declaring its broker secret was refused: %v", err)
 	}
 }

cmd/mesh-controller/plan.go

@@ -163,7 +163,14 @@ func planFor(ctx context.Context, open *stores, nodeName string) (catalogue.Reso
 			}
 			continue
 		}
-		secret, err := inv.SecretFor(ctx, n.Name, nodeName, n.For, n.From, n.Local)
+		var secret inventory.Secret
+		var err error
+		if n.SharedOwn != "" {
+			// The provider's one credential, sealed to this consumer too (novox/hq ADR 0158).
+			secret, err = inv.SharedSecretFor(ctx, n.Name, nodeName, n.For, n.From, providerModuleOf(resolved, open, ctx, n), n.Local, n.SharedOwn)
+		} else {
+			secret, err = inv.SecretFor(ctx, n.Name, nodeName, n.For, n.From, n.Local)
+		}
 		if err != nil {
 			// Said rather than skipped. A machine that resolves cleanly and receives no
 			// credential is one that will fail to authenticate at some later, less obvious
@@ -731,9 +738,13 @@ func routeNamesInTheMesh(ctx context.Context, open *stores) (map[string]string,
 		return nil, fmt.Errorf("which machines the mesh has cannot be read: %w", err)
 	}
 
-	out := map[string]string{}
+	// Every machine's resolution first, then the names across them at once: which node serves a
+	// name is a question about the graph — the consumer on one machine, the provider on another —
+	// and answered wrongly by looking at one contribution at a time (novox/hq issue 178).
+	plans := map[string]catalogue.Resolution{}
+	settings := map[string]catalogue.SettingsBy{}
 	for _, n := range nodes {
-		plan, settings, err := planFor(ctx, open, n.Name)
+		plan, layers, err := planFor(ctx, open, n.Name)
 		switch {
 		case unresolvable(err):
 			// Their set does not compose, so they serve no names. Passed over, so one machine's
@@ -745,38 +756,16 @@ func routeNamesInTheMesh(ctx context.Context, open *stores) (map[string]string,
 			// operator having withdrawn them (novox/hq 04-ISSUES/152).
 			return nil, fmt.Errorf("the names %s serves cannot be read: %w", n.Name, err)
 		}
-		for _, m := range plan.Modules {
+		plans[n.Name], settings[n.Name] = plan, layers
-			for to := range m.Contributes {
+	}
-				values, asks, err := plan.ContributionsFrom(to, m.Module, settings)
+	served, err := catalogue.NamesServed(plans, settings)
 	if err != nil {
 		return nil, err
 	}
-				if !asks {
+	out := map[string]string{}
-					continue
+	for name, node := range served {
-				}
+		if at := address[node]; at != "" {
-				// A routed name, and only that: a contribution the mesh composed a name for from a
+			out[name] = at
-				// label it was given. A grant that happens to carry a `name` of its own — a database
-				// name — carries no label and is left alone.
-				if _, labelled := values["label"]; !labelled {
-					continue
-				}
-				name, _ := values["name"].(string)
-				if name == "" {
-					continue
-				}
-				// The node that serves it: whoever answers this consumer's route requirement, or
-				// this same node when the proxy is beside the consumer.
-				serving := n.Name
-				for _, need := range plan.Needs {
-					if need.Name == to && need.For == m.Module {
-						serving = need.From
-						break
-					}
-				}
-				if at := address[serving]; at != "" {
-					out[strings.ToLower(name)] = at
-				}
-			}
 		}
 	}
 	return out, nil
@@ -1356,3 +1345,23 @@ func foundationPortsFor(brokerPort int, modules []catalogue.Manifest) []int {
 	}
 	return nil
 }
+
+// providerModuleOf is which module answers a need on the providing node: the one in this node's
+// own set when the provider is here, else the one the catalogue says offers it.
+func providerModuleOf(resolved catalogue.Resolution, open *stores, ctx context.Context, n catalogue.Needed) string {
+	for _, m := range resolved.Modules {
+		if _, shared := m.SharedCredentialOf(n.Name); shared {
+			return m.Module
+		}
+	}
+	shelf, err := open.inventory.Catalogue(ctx)
+	if err != nil {
+		return ""
+	}
+	for name, m := range shelf {
+		if _, shared := m.SharedCredentialOf(n.Name); shared {
+			return name
+		}
+	}
+	return ""
+}

cmd/mesh-controller/push.go

@@ -7,6 +7,7 @@ import (
 	"errors"
 	"flag"
 	"fmt"
+	"log"
 	"os"
 	"sort"
 	"strings"
@@ -124,6 +125,22 @@ func serve(ctx context.Context) error {
 		return err
 	}
 
+	// And the mesh's own verbs, as the seat this control plane holds (novox/hq ADR 0154). Served
+	// from the store's row, so what the seat declares is what is answered.
+	handlers, err := seatToolHandlers()
+	if err != nil {
+		return err
+	}
+	bus, isNATS := server.Bus().(link.OverNATS)
+	if !isNATS {
+		return errors.New("the mesh's verbs are served over the bus, and this control plane is not on it")
+	}
+	stopServing, err := bus.ServeSeatTools(catalogue.ControllerSeatName, handlers, log.New(os.Stdout, "", log.LstdFlags))
+	if err != nil {
+		return err
+	}
+	defer stopServing()
+
 	return server.Serve(ctx)
 }
 

cmd/mesh-controller/seatverbs.go

@@ -0,0 +1,226 @@
+package main
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"os"
+	"os/exec"
+	"strings"
+
+	"github.com/novox/mesh-controller/internal/catalogue"
+	"github.com/novox/mesh-controller/internal/link"
+)
+
+// The mesh's own verbs, served as the mesh-controller seat's tools (novox/hq ADR 0154, design 33).
+//
+// **Each tool runs the command it names, in this same binary, and answers what it printed.** That is
+// ADR 0035 taken literally: the logic lives once, in the command, and a surface is an adapter with no
+// decisions in it. Running a fresh process rather than calling the function keeps two things true
+// that calling it would not — every command opens and closes its own stores the way it does from a
+// shell, and nothing a command prints to the process's standard output can leak into another call's
+// answer. It also means a refusal is the same refusal in the same words, because it is the same
+// output.
+
+// verbAnswer is what a verb answers: what the command printed, whether it succeeded, and — where the
+// command speaks JSON — the same as data.
+type verbAnswer struct {
+	Output string `json:"output"`
+	OK     bool   `json:"ok"`
+	Answer any    `json:"answer,omitempty"`
+}
+
+// argvFor is the command line a verb and its arguments become. Only the verbs the seat declares, and
+// only the arguments each declares: a caller cannot reach a flag the schema did not name.
+func argvFor(verb string, args map[string]any) ([]string, error) {
+	str := func(key string) string {
+		v, _ := args[key].(string)
+		return strings.TrimSpace(v)
+	}
+	need := func(keys ...string) error {
+		for _, k := range keys {
+			if str(k) == "" {
+				return fmt.Errorf("%s needs %q", verb, k)
+			}
+		}
+		return nil
+	}
+	switch verb {
+	case "status":
+		return []string{"status", "--json"}, nil
+	case "nodes":
+		return []string{"node", "list"}, nil
+	case "node":
+		if err := need("node"); err != nil {
+			return nil, err
+		}
+		return []string{"node", "show", str("node")}, nil
+	case "modules":
+		return []string{"module", "list"}, nil
+	case "seats":
+		return []string{"seats", "--json"}, nil
+	case "builds":
+		if id := str("log"); id != "" {
+			return []string{"builds", "--log", id}, nil
+		}
+		if m := str("module"); m != "" {
+			return []string{"builds", m}, nil
+		}
+		return []string{"builds"}, nil
+	case "plan":
+		if err := need("node"); err != nil {
+			return nil, err
+		}
+		return []string{"plan", str("node"), "--json"}, nil
+	case "assign", "unassign":
+		if err := need("node", "module"); err != nil {
+			return nil, err
+		}
+		return []string{verb, str("node"), str("module")}, nil
+	case "push":
+		// Sent and not waited for: the asker reads `status` for what the machine did, which is
+		// what a person at a shell does too. A tool call that blocked for a push's whole apply would
+		// time out on every machine that takes a minute, and say nothing about the ones that did not.
+		if n := str("node"); n != "" {
+			return []string{"push", n, "--wait", "0"}, nil
+		}
+		return []string{"push", "--behind", "--wait", "0"}, nil
+	case "rotate":
+		if p := str("provision"); p != "" {
+			argv := []string{"rotate", p}
+			if c := str("consumer"); c != "" {
+				argv = append(argv, "--consumer", c)
+			}
+			return argv, nil
+		}
+		if str("node") != "" && str("module") != "" && str("secret") != "" {
+			return []string{"secret", "rotate", str("node"), str("module"), str("secret")}, nil
+		}
+		// Half of either shape: the command says its usage, which names both shapes, and that is
+		// the answer the caller needs.
+		return []string{"rotate"}, nil
+	case "build":
+		// Three shapes, as the command has them: a repository, a base every module built on it
+		// is rebuilt from (`--on`), or everything behind its source (`--behind`). Asked, not
+		// waited for, the same as a single build.
+		if on := str("on"); on != "" {
+			return []string{"build", "--on", on, "--wait", "0"}, nil
+		}
+		if b := str("behind"); b != "" && b != "no" && b != "false" {
+			return []string{"build", "--behind", "--wait", "0"}, nil
+		}
+		if err := need("repository"); err != nil {
+			return nil, err
+		}
+		// Not waited for: a tool call cannot hold a connection for the minutes a build takes; the
+		// daemon takes the outcome in when it comes and the id follows the build (issue 176). A
+		// repository given without a scheme is a path on the forge holding the git seat.
+		argv := []string{"build", str("repository"), "--wait", "0"}
+		if !strings.Contains(str("repository"), "://") && !strings.HasPrefix(str("repository"), "git@") {
+			argv = append(argv, "--self")
+		}
+		if p := str("path"); p != "" {
+			argv = append(argv, "--path", p)
+		}
+		if r := str("ref"); r != "" {
+			argv = append(argv, "--ref", r)
+		}
+		return argv, nil
+	}
+	return nil, fmt.Errorf("%q is not a verb the %s seat serves", verb, catalogue.ControllerSeatName)
+}
+
+// jsonVerbs are the verbs whose command speaks JSON, so the answer carries it as data as well.
+var jsonVerbs = map[string]bool{"status": true, "seats": true, "plan": true}
+
+// runVerb runs this binary with the given command line and gathers what it said.
+func runVerb(ctx context.Context, argv []string) (verbAnswer, error) {
+	self, err := os.Executable()
+	if err != nil {
+		return verbAnswer{}, err
+	}
+	cmd := exec.CommandContext(ctx, self, argv...)
+	// The same environment: the stores' credentials, the bus, the broker — everything a command run
+	// from a shell in this container would have, because it is that.
+	cmd.Env = os.Environ()
+	// Two buffers, one answer. What the command *says* is both streams, in the order a person at
+	// a shell would read them; what it *answers as data* is standard output alone — `status --json`
+	// prints its warnings beside the document, and a JSON parsed from the two together parsed
+	// nothing (2026-09-30, the first status asked through the console had no `answer`).
+	var stdout, stderr bytes.Buffer
+	cmd.Stdout = &stdout
+	cmd.Stderr = &stderr
+	runErr := cmd.Run()
+	answer := verbAnswer{Output: stdout.String() + stderr.String(), OK: runErr == nil}
+	if jsonVerbs[argv[0]] && runErr == nil {
+		var parsed any
+		if json.Unmarshal(bytes.TrimSpace(stdout.Bytes()), &parsed) == nil {
+			answer.Answer = parsed
+		}
+	}
+	var exit *exec.ExitError
+	if runErr != nil && !errors.As(runErr, &exit) {
+		// Not the command refusing — the command not running at all, which is this process's fault.
+		return answer, fmt.Errorf("could not run %s: %w", strings.Join(argv, " "), runErr)
+	}
+	return answer, nil
+}
+
+// seatToolHandlers are the handlers for every verb the mesh-controller seat declares, from the
+// store's row, so a verb the row does not carry is not served and a verb it carries that this binary
+// cannot run is said at start rather than at the first call.
+func seatToolHandlers() (map[string]link.ToolHandler, error) {
+	seat, known := catalogue.SeatNamed(catalogue.ControllerSeatName)
+	if !known {
+		return nil, fmt.Errorf("this mesh defines no %s seat", catalogue.ControllerSeatName)
+	}
+	handlers := map[string]link.ToolHandler{}
+	for _, v := range seat.Serves {
+		verb := v.Name
+		if verb == "tools" {
+			handlers[verb] = func(ctx context.Context, _ json.RawMessage) (any, error) {
+				return seatTools(), nil
+			}
+			continue
+		}
+		if _, err := argvFor(verb, map[string]any{"node": "x", "module": "x", "repository": "x"}); err != nil {
+			return nil, fmt.Errorf("the %s seat's row declares %q, which this control plane cannot run: %w",
+				catalogue.ControllerSeatName, verb, err)
+		}
+		handlers[verb] = func(ctx context.Context, raw json.RawMessage) (any, error) {
+			args := map[string]any{}
+			if len(raw) > 0 {
+				if err := json.Unmarshal(raw, &args); err != nil {
+					return nil, fmt.Errorf("the arguments are not a JSON object: %w", err)
+				}
+			}
+			argv, err := argvFor(verb, args)
+			if err != nil {
+				return nil, err
+			}
+			return runVerb(ctx, argv)
+		}
+	}
+	return handlers, nil
+}
+
+// seatTools is what `tools` answers: every seat with a protocol, and the tools each serves, from the
+// mesh's own records — no holder in the path, so it is true while a holder restarts (design 33 §5).
+func seatTools() map[string]any {
+	var seats []map[string]any
+	for _, s := range catalogue.SeatsWithAProtocol() {
+		if len(s.Serves) == 0 {
+			continue
+		}
+		var tools []map[string]any
+		for _, v := range s.Serves {
+			tools = append(tools, map[string]any{
+				"name": v.Name, "description": v.Description, "input": v.Input, "output": v.Output,
+			})
+		}
+		seats = append(seats, map[string]any{"seat": s.Name, "scope": s.Scope, "tools": tools})
+	}
+	return map[string]any{"seats": seats}
+}

cmd/mesh-controller/seatverbs_test.go

@@ -0,0 +1,157 @@
+package main
+
+import (
+	"strings"
+	"testing"
+
+	"github.com/novox/mesh-controller/internal/catalogue"
+)
+
+// Every verb the mesh-controller seat declares is one this binary can run, with the arguments the
+// schema names and no other (novox/hq ADR 0154, ADR 0035).
+func TestEveryDeclaredVerbHasACommandLine(t *testing.T) {
+	for _, v := range catalogue.ControllerVerbs {
+		if v.Name == "tools" {
+			continue
+		}
+		args := map[string]any{}
+		props, _ := v.Input["properties"].(map[string]any)
+		for name := range props {
+			args[name] = "x"
+		}
+		argv, err := argvFor(v.Name, args)
+		if err != nil {
+			t.Errorf("%s: %v", v.Name, err)
+			continue
+		}
+		if argv[0] == "" {
+			t.Errorf("%s: empty command", v.Name)
+		}
+	}
+}
+
+// `builds` given a build's id reads that build's log from the bus rather than listing builds
+// (novox/hq ADR 0157).
+func TestBuildsWithAnIdReadsThatBuildsLog(t *testing.T) {
+	argv, err := argvFor("builds", map[string]any{"log": "build-17"})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if strings.Join(argv, " ") != "builds --log build-17" {
+		t.Fatalf("builds with a log id became %q", strings.Join(argv, " "))
+	}
+}
+
+// The build tool takes a repository as a URL or as its path on the forge holding the git seat, and
+// says which it was given, so the command reads the path as a seat source rather than handing it to
+// git as written (novox/hq issue 176). And it never waits: the id follows the build.
+func TestTheBuildToolTellsAForgePathFromAURL(t *testing.T) {
+	argv, _ := argvFor("build", map[string]any{"repository": "novox/mesh-catalog", "path": "modules/x"})
+	if line := strings.Join(argv, " "); !strings.Contains(line, "--self") || !strings.Contains(line, "--wait 0") {
+		t.Fatalf("a forge path is a seat source, not waited for; got %q", line)
+	}
+	argv, _ = argvFor("build", map[string]any{"repository": "https://example.tld/o/r.git"})
+	if line := strings.Join(argv, " "); strings.Contains(line, "--self") {
+		t.Fatalf("a URL is cloned as given; got %q", line)
+	}
+}
+
+// `rotate` is one verb with two shapes (ADR 0114, issue 180): a pair credential by provision, or a
+// module's own secret by machine, module and name.
+func TestRotateTakesAProvisionOrAnOwnSecret(t *testing.T) {
+	argv, _ := argvFor("rotate", map[string]any{"provision": "postgres-database", "consumer": "ace"})
+	if strings.Join(argv, " ") != "rotate postgres-database --consumer ace" {
+		t.Fatalf("a pair credential: %v", argv)
+	}
+	argv, _ = argvFor("rotate", map[string]any{"node": "ace", "module": "nodered", "secret": "api-token"})
+	if strings.Join(argv, " ") != "secret rotate ace nodered api-token" {
+		t.Fatalf("an own secret: %v", argv)
+	}
+	argv, _ = argvFor("rotate", map[string]any{"node": "ace"})
+	if strings.Join(argv, " ") != "rotate" {
+		t.Fatalf("half an own secret falls to the command's usage: %v", argv)
+	}
+}
+
+// A required argument missing is refused in the verb's own words, before anything runs.
+func TestAVerbMissingWhatItNeedsIsRefused(t *testing.T) {
+	if _, err := argvFor("node", map[string]any{}); err == nil || !strings.Contains(err.Error(), `node needs "node"`) {
+		t.Fatalf("node without a machine was accepted: %v", err)
+	}
+	if _, err := argvFor("upgrade", map[string]any{}); err == nil {
+		t.Fatal("a verb the seat does not serve was accepted")
+	}
+}
+
+// A push and a build are sent, not waited for: the asker reads status, or the build's log by its
+// id, for what happened. A repository given as a forge path is said to be one (issue 176).
+func TestActsDoNotBlockTheCall(t *testing.T) {
+	argv, _ := argvFor("push", map[string]any{"node": "one"})
+	if strings.Join(argv, " ") != "push one --wait 0" {
+		t.Fatalf("push waits: %v", argv)
+	}
+	argv, _ = argvFor("build", map[string]any{"repository": "novox/x", "path": "modules/x"})
+	if strings.Join(argv, " ") != "build novox/x --wait 0 --self --path modules/x" {
+		t.Fatalf("build: %v", argv)
+	}
+}
+
+// What `tools` answers is the seats' records, with each verb's schema.
+func TestToolsAnswersTheSeatsRecords(t *testing.T) {
+	handlers, err := seatToolHandlers()
+	if err != nil {
+		t.Fatal(err)
+	}
+	if len(handlers) != len(catalogue.ControllerVerbs) {
+		t.Fatalf("%d handlers for %d verbs", len(handlers), len(catalogue.ControllerVerbs))
+	}
+	answer := seatTools()
+	seats, _ := answer["seats"].([]map[string]any)
+	var found bool
+	for _, s := range seats {
+		if s["seat"] == catalogue.ControllerSeatName {
+			found = true
+			tools, _ := s["tools"].([]map[string]any)
+			if len(tools) != len(catalogue.ControllerVerbs) || tools[0]["input"] == nil {
+				t.Fatalf("the controller seat's tools are not listed in full: %v", tools)
+			}
+		}
+	}
+	if !found {
+		t.Fatal("the mesh-controller seat is not in the listing")
+	}
+}
+
+// A JSON verb's answer is parsed from what the command wrote to standard output alone; a warning it
+// printed beside the document does not take the document away. The test binary stands in for the
+// controller: `-test.run` with a name that matches nothing prints `ok` and a warning about no tests.
+func TestAJSONVerbsAnswerIsItsStandardOutput(t *testing.T) {
+	jsonVerbs["-test.run"] = true
+	t.Cleanup(func() { delete(jsonVerbs, "-test.run") })
+	answer, err := runVerb(t.Context(), []string{"-test.run", "TestAnswerEcho", "-test.v"})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !answer.OK {
+		t.Fatalf("the command failed: %s", answer.Output)
+	}
+	if !strings.Contains(answer.Output, "PASS") {
+		t.Fatalf("stderr and stdout are both what the command said: %s", answer.Output)
+	}
+}
+
+// The build tool has the command's three shapes (ADR 0157's follow-up, 2026-10-01): a repository, a
+// base whose dependents are rebuilt, or everything behind its source — each asked, not waited for.
+func TestTheBuildToolRebuildsWhatStandsOnABase(t *testing.T) {
+	argv, _ := argvFor("build", map[string]any{"on": "mesh-tools"})
+	if strings.Join(argv, " ") != "build --on mesh-tools --wait 0" {
+		t.Fatalf("a base: %v", argv)
+	}
+	argv, _ = argvFor("build", map[string]any{"behind": "yes"})
+	if strings.Join(argv, " ") != "build --behind --wait 0" {
+		t.Fatalf("behind: %v", argv)
+	}
+	if _, err := argvFor("build", map[string]any{}); err == nil {
+		t.Fatal("a build naming nothing was accepted")
+	}
+}

cmd/mesh-controller/secret.go

@@ -10,6 +10,7 @@ import (
 	"io"
 	"os"
 	"strings"
+	"time"
 
 	"github.com/novox/mesh-controller/internal/catalogue"
 	"github.com/novox/mesh-controller/internal/inventory"
@@ -38,6 +39,8 @@ func secretCommand(ctx context.Context, args []string) error {
 	}
 	switch args[0] {
 	case "accept":
+	case "rotate":
+		return secretRotate(ctx, args[1:])
 	case "recover":
 		return secretRecover(ctx, args[1:])
 	case "export":
@@ -101,7 +104,8 @@ func secretCommand(ctx context.Context, args []string) error {
 	return nil
 }
 
-const secretUsage = "secret accept <node> <module> <name> [--from <file>] [--provider <node> [--local <name>]]\n" +
+const secretUsage = "secret rotate <node> <module> <name>\n" +
+	"secret accept <node> <module> <name> [--from <file>] [--provider <node> [--local <name>]]\n" +
 	"secret recover <node> <module> <name> --key <operator-key> [--out <file>] [--from-export <file>] [--provider <node>]\n" +
 	"secret export [--out <file>]"
 
@@ -359,3 +363,59 @@ func valueFor(node, module, name, from string) (string, error) {
 		return line, nil
 	}
 }
+
+// secretRotate makes a module's own secret anew and sends the machine, so the module starts again on
+// the new value (novox/hq ADR 0114, issue 180). A pair credential rotates with `rotate <provision>`;
+// this is the secret with one party. Said in the log with who asked and when, never the value.
+func secretRotate(ctx context.Context, args []string) error {
+	rest, _ := split(args)
+	if len(rest) != 3 {
+		return errors.New(secretUsage)
+	}
+	node, module, name := rest[0], rest[1], rest[2]
+	open, err := openStores(ctx)
+	if err != nil {
+		return err
+	}
+	defer open.Close()
+	if err := open.inventory.RotateModuleSecret(ctx, node, module, name); err != nil {
+		var refused inventory.ErrNotRotatable
+		if errors.As(err, &refused) {
+			return fmt.Errorf("not rotated: %s", refused.Why)
+		}
+		return err
+	}
+	fmt.Printf("rotated %q of %s on %s at %s, asked by %s; the value is sealed and not shown\n",
+		name, module, node, time.Now().UTC().Format(time.RFC3339), whoAsked())
+	// A shared credential (ADR 0158) has as many holders as the provision has consumers, and all
+	// of them are sent in one act, so no machine is left reading a value the provider no longer takes.
+	machines, err := open.inventory.SharedHolders(ctx, node, module, name)
+	if err != nil {
+		return err
+	}
+	if len(machines) == 0 {
+		machines = []string{node}
+	}
+	if len(machines) == 1 {
+		fmt.Printf("sending %s, so %s starts again on the new value:\n", node, module)
+	} else {
+		fmt.Printf("shared with every consumer; sending %s together:\n", strings.Join(machines, ", "))
+	}
+	if err := sendTo(ctx, open, machines); err != nil {
+		return fmt.Errorf("%w\n\nThe new value is sealed and not yet delivered; what runs keeps the old "+
+			"one until the machines next apply. Fix the cause and run `push --behind`", err)
+	}
+	return nil
+}
+
+// whoAsked names the caller for the log: the account the command runs as, which for a tool call
+// through the console is the mesh's own.
+func whoAsked() string {
+	if u := os.Getenv("SUDO_USER"); u != "" {
+		return u
+	}
+	if u := os.Getenv("USER"); u != "" {
+		return u
+	}
+	return "the mesh"
+}

cmd/mesh-controller/sendable_test.go

@@ -47,7 +47,12 @@ func composed(t *testing.T, open *stores, node string) sendable {
 // aMesh's laptop with the private network taken off it, so nothing in the declaration is random:
 // what changes this string is a change to what a converged machine is sent, which is the thing an
 // older host would refuse.
-const convergedBefore = `{"declaration":1,"resources":[{"content":"hello","id":"hello-web.page","path":"/var/lib/hello-web/index.html","type":"file"},{"hosts":["anchor.internal:10.77.0.1"],"id":"hello-web.server","image":"registry.example/hello@sha256:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa","name":"hello-web","type":"container"},{"id":"hello-web.served","path":"/var/lib/hello-web","type":"directory"}]}`
+//
+// Re-captured 2026-10-01 (novox/hq issue 177): c978aa7 took `hosts` off every container — a
+// machine's own resolver knows the mesh's names now — and left this string carrying it, so the
+// guard failed for a day and nothing ran it. A field an older host never sees is the one change
+// this guard permits; a field it would refuse is the one it exists to catch.
+const convergedBefore = `{"declaration":1,"resources":[{"content":"hello","id":"hello-web.page","path":"/var/lib/hello-web/index.html","type":"file"},{"id":"hello-web.server","image":"registry.example/hello@sha256:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa","name":"hello-web","type":"container"},{"id":"hello-web.served","path":"/var/lib/hello-web","type":"directory"}]}`
 
 func TestAConvergedDeclarationIsByteForByteWhatItWas(t *testing.T) {
 	open := aMesh(t)

cmd/mesh-controller/source.go

@@ -82,6 +82,16 @@ func cloneFrom(ctx context.Context, source buildSource) (string, error) {
 // serves no scheme or port has nothing to compose from — a default port here would be the forge's
 // address guessed, which is the thing this exists to stop.
 func clonedFromSeat(world catalogue.World, seatName, repository string) (string, error) {
+	base, err := seatBase(world, seatName)
+	if err != nil {
+		return "", err
+	}
+	path := strings.TrimSuffix(strings.Trim(repository, "/"), ".git")
+	return fmt.Sprintf("%s/%s.git", base, path), nil
+}
+
+// seatBase is `scheme://host:port` of a seat's holder as the mesh reaches it, for cloning.
+func seatBase(world catalogue.World, seatName string) (string, error) {
 	seat, known := catalogue.SeatNamed(seatName)
 	if !known || seat.Delivers == "" {
 		return "", fmt.Errorf("%q is not a seat a repository can live on", seatName)
@@ -94,9 +104,9 @@ func clonedFromSeat(world catalogue.World, seatName, repository string) (string,
 		}
 	}
 	if holder == nil {
-		return "", fmt.Errorf("nobody holds the %s seat, so %s cannot be cloned from this mesh's "+
+		return "", fmt.Errorf("nobody holds the %s seat, so nothing can be cloned from this mesh's "+
 			"forge — assign a module that claims it, or build from the repository's URL without --self",
-			seat.Name, repository)
+			seat.Name)
 	}
 	var provider *catalogue.Provider
 	for i, p := range world.Offered[seat.Delivers] {
@@ -118,8 +128,33 @@ func clonedFromSeat(world catalogue.World, seatName, repository string) (string,
 		return "", fmt.Errorf("%s on %s holds the %s seat and does not serve a scheme and a port for %q",
 			holder.Module, holder.Node, seat.Name, seat.Delivers)
 	}
-	path := strings.TrimSuffix(strings.Trim(repository, "/"), ".git")
+	return fmt.Sprintf("%s://%s:%s", scheme, provider.At, port), nil
-	return fmt.Sprintf("%s://%s:%s/%s.git", scheme, provider.At, port, path), nil
+}
+
+// seatBases is the clone base of every seat a recipe's context may name, for a build request
+// (novox/hq ADR 0155). A seat nobody holds is left out rather than refused here: the build may not
+// name it at all, and if it does the builder refuses with the seat's name.
+func seatBases(ctx context.Context) map[string]string {
+	open, err := openStores(ctx)
+	if err != nil {
+		return nil
+	}
+	defer open.Close()
+	shelf, err := open.inventory.Catalogue(ctx)
+	if err != nil {
+		return nil
+	}
+	world, err := theRestOfTheMesh(ctx, open.inventory, shelf, "")
+	if err != nil {
+		return nil
+	}
+	bases := map[string]string{}
+	for _, seatName := range []string{gitSeat} {
+		if base, err := seatBase(world, seatName); err == nil {
+			bases[seatName] = base
+		}
+	}
+	return bases
 }
 
 // servedPort is a served port as text, however the manifest and the node's settings carried it.

internal/broker/agreement_catalogue_test.go

@@ -67,7 +67,7 @@ func TestTheAgreementCheckCatchesASubscriptionThatMatchesNothing(t *testing.T) {
 	// An event published under a seat's name is real even though no module declares it as its own.
 	if bad := Disagreements(nil,
 		[]AConsumer{{Module: "watcher", Consumes: []string{"mesh-artifact-store.image.pushed"}}},
-		[]DeclaredSeat{{Name: "the-artifact-store", Emits: []string{"image.pushed"}}}); len(bad) != 0 {
+		[]DeclaredSeat{{Name: "mesh-artifact-store", Emits: []string{"image.pushed"}}}); len(bad) != 0 {
 		t.Fatalf("an event a seat emits was reported as matching nothing: %v", bad)
 	}
 }

internal/broker/derived.go

@@ -40,6 +40,13 @@ type Consumer struct {
 	AckWaitSeconds int
 	// MaxDeliver before the message is dead-lettered; zero for the mesh's default.
 	MaxDeliver int
+	// MaxAckPending is how many deliveries the server lets stand unacknowledged at once; zero for
+	// the server's default, which is many. **One, for a consumer handled one at a time**
+	// (novox/hq issue 175): a handler that builds for minutes keeps its own message alive with a
+	// heartbeat, but everything handed over behind it times out unacknowledged and comes back —
+	// and a merge that came back rebuilt what it had just built, five times over on 2026-09-30.
+	// With one outstanding, the server holds the rest, and the heartbeat is keeping the message.
+	MaxAckPending int
 	Why           string
 }
 

internal/broker/invokes_test.go

@@ -42,7 +42,8 @@ func TestInvokingGrantsNothingButTheCall(t *testing.T) {
 		if strings.Contains(p, ".event.") {
 			t.Errorf("a module that only invokes may publish %q, an event it never declared", p)
 		}
-		if strings.HasPrefix(p, "mesh.seat.") {
+		// A role's tools are tools (ADR 0132); a role's work queue and events are not.
+		if strings.HasPrefix(p, "mesh.seat.") && !strings.Contains(p, ".tool.") {
 			t.Errorf("a module that only invokes may publish %q, a seat it neither holds nor uses", p)
 		}
 	}
@@ -90,3 +91,16 @@ func TestADeclaredInvokeReachesTheComposedUser(t *testing.T) {
 	}
 	has(t, perms.Publish, "mesh.mod.*.tool.>")
 }
+
+// A module's tool is addressed two ways (novox/hq ADR 0159): to whichever instance answers, and to
+// the instance on one machine. A grant for the tool covers both and nothing wider.
+func TestInvokingAToolMayAddressTheMachineToo(t *testing.T) {
+	got, err := invokedSubjects([]string{"postgres.postgres_query"})
+	if err != nil {
+		t.Fatal(err)
+	}
+	want := []string{"mesh.mod.postgres.tool.postgres_query", "mesh.mod.postgres.tool.postgres_query.*"}
+	if len(got) != 2 || got[0] != want[0] || got[1] != want[1] {
+		t.Fatalf("the grant is %v, want %v", got, want)
+	}
+}

internal/broker/jetstream.go

@@ -179,6 +179,7 @@ func (j *JetStream) EnsureConsumer(c Consumer) error {
 		AckPolicy:      nats.AckExplicitPolicy,
 		AckWait:        time.Duration(c.AckWaitSeconds) * time.Second,
 		MaxDeliver:     c.MaxDeliver,
+		MaxAckPending:  c.MaxAckPending,
 		DeliverGroup:   c.Queue,
 		DeliverSubject: "",
 		Description:    c.Why,

internal/broker/nats.go

@@ -40,6 +40,10 @@ const (
 // emits (novox/hq ADR 0118, design 29 §5).
 type Seat struct {
 	Name string
+	// Scope is where the seat has one holder. A node-scoped seat's tool carries the node in its
+	// subject, because one subject reaching six machines' holders is not an address
+	// (novox/hq ADR 0132, design 33 §4). Empty reads as mesh.
+	Scope    string
 	Accepts  []string
 	Emits    []string
 	Serves   []string
@@ -197,6 +201,13 @@ func PermissionsFor(p Principal) (Permissions, error) {
 		// the new bus was refused the publish (2026-09-28).
 		pub = append(pub, "mesh.mod.*.tool.>")
 
+		// **And the mesh's own verbs, as the seat it holds** (novox/hq ADR 0132, ADR 0154):
+		// `status`, `push`, `assign` are the mesh-controller seat's tools, served by its holder. The
+		// whole verb namespace of its own seat rather than a list: the list is the seat's protocol,
+		// which this package mirrors rather than reads, and a verb the seat does not declare is a
+		// subject nothing publishes.
+		sub = append(sub, "mesh.seat."+ControllerSeat+".tool.>")
+
 		// The two events it reacts to, and its ack subject on the stream they arrive from
 		// (streams.go). **Each named, not a pattern**: `mesh.mod.*.event.>` would make the
 		// controller a subscriber to every event in the mesh, and its permission list would stop
@@ -343,7 +354,7 @@ func PermissionsFor(p Principal) (Permissions, error) {
 				pub = append(pub, seatSubject(s, "event", e))
 			}
 			for _, t := range s.Serves {
-				sub = append(sub, seatSubject(s, "tool", t))
+				sub = append(sub, seatToolSubject(s, t, p.Node))
 			}
 		}
 
@@ -355,7 +366,7 @@ func PermissionsFor(p Principal) (Permissions, error) {
 				pub = append(pub, seatSubject(s, "accept", a))
 			}
 			for _, t := range s.Serves {
-				pub = append(pub, seatSubject(s, "tool", t))
+				pub = append(pub, seatToolSubject(s, t, "*"))
 			}
 		}
 	}
@@ -405,6 +416,18 @@ func seatSubject(s Seat, kind, verb string) string {
 	return "mesh.seat." + s.Name + "." + kind + "." + verb
 }
 
+// seatToolSubject is where a role's tool is asked. Mesh-wide for a mesh-scoped seat; a node-scoped
+// seat carries the node it is asked of, because a flat subject would reach every machine's holder
+// and the queue group would silently pick a winner (novox/hq ADR 0132, design 33 §4). A holder
+// subscribes its own node's; a user publishes any node's (`*`) and names the machine in the subject.
+func seatToolSubject(s Seat, verb, node string) string {
+	base := seatSubject(s, "tool", verb)
+	if s.Scope == "node" && node != "" {
+		return base + "." + node
+	}
+	return base
+}
+
 // consumerStream and consumerDurable are the two halves of a consumer's identity, and they are
 // two functions because conflating them was a real bug.
 //
@@ -615,15 +638,32 @@ func invokedSubjects(invokes []string) ([]string, error) {
 	var out []string
 	for _, t := range invokes {
 		if t == "*" {
-			out = append(out, "mesh.mod.*.tool.>")
+			// Every module's tools and every role's (novox/hq ADR 0132): a role's verb is a tool
+			// like any other, addressed to the seat instead of a module.
+			out = append(out, "mesh.mod.*.tool.>", "mesh.seat.*.tool.>")
+			continue
+		}
+		if rest, isSeat := strings.CutPrefix(t, "seat:"); isSeat {
+			// A role's tool, `seat:<seat>.<verb>`. Both address shapes, because the grant is
+			// written without knowing the seat's scope: a mesh seat's verb is flat and a node
+			// seat's carries the machine (design 33 §4).
+			seat, verb, ok := strings.Cut(rest, ".")
+			if !ok || seat == "" || verb == "" {
+				return nil, fmt.Errorf(
+					"%q does not name a role's tool: one invokes seat:<seat>.<verb>", t)
+			}
+			out = append(out, "mesh.seat."+seat+".tool."+verb, "mesh.seat."+seat+".tool."+verb+".*")
 			continue
 		}
 		module, tool, ok := strings.Cut(t, ".")
 		if !ok || module == "" || tool == "" {
 			return nil, fmt.Errorf(
-				"%q does not name a tool: one invokes <module>.<tool>, or * for every one", t)
+				"%q does not name a tool: one invokes <module>.<tool>, seat:<seat>.<verb>, or * for every one", t)
 		}
-		out = append(out, "mesh.mod."+module+".tool."+tool)
+		// Both ways a module's tool is addressed (novox/hq ADR 0159): to whichever instance
+		// answers, and to the instance on one machine, which is the same subject with the machine
+		// as its last token.
+		out = append(out, "mesh.mod."+module+".tool."+tool, "mesh.mod."+module+".tool."+tool+".*")
 	}
 	return out, nil
 }

internal/broker/nats_test.go

@@ -71,6 +71,18 @@ func TestHoldingASeatIsTheMirrorOfUsingIt(t *testing.T) {
 	hasNot(t, perms.Publish, "mesh.seat.telegram-sender.accept.send")
 }
 
+// A build machine may say everything about a build as it happens (novox/hq ADR 0157): that it
+// started, and every line under the build's own id — the seat's `log.*` becomes a publish over
+// one token, so a reader follows one build by subject and the holder can name no other subject.
+func TestTheBuildMachineMaySayWhatItDoesUnderTheBuildsId(t *testing.T) {
+	seat := Seat{Name: "mesh-build-machine", Accepts: []string{"build"}, Emits: []string{"started", "built", "log.*"}}
+	perms, _ := PermissionsFor(Principal{Kind: KindModule, Node: "anchor", Module: "builder",
+		Holds: []Seat{seat}, PasswordHash: "x"})
+	has(t, perms.Publish, "mesh.seat.mesh-build-machine.event.started")
+	has(t, perms.Publish, "mesh.seat.mesh-build-machine.event.log.*")
+	hasNot(t, perms.Publish, "mesh.seat.mesh-build-machine.event.>")
+}
+
 // Without an ack permission a durable consumer never really consumes: every message it receives is
 // redelivered forever, refused by the permission list it already has (design 25 §4).
 func TestAModuleMayAckItsOwnDeliveriesAndNoOthers(t *testing.T) {

internal/broker/seattools_test.go

@@ -0,0 +1,57 @@
+package broker
+
+import "testing"
+
+// A node-scoped seat's tool carries the node (novox/hq ADR 0132, design 33 §4): two nodes holding one
+// node-scoped seat derive two addresses, and a user of the seat may publish any node's.
+func TestTwoNodesHoldingOneNodeSeatDeriveTwoToolAddresses(t *testing.T) {
+	seat := Seat{Name: "node-dns-resolver", Scope: "node", Serves: []string{"lookup"}}
+	one, _ := PermissionsFor(Principal{Kind: KindModule, Node: "one", Module: "dnsmasq", Holds: []Seat{seat}, PasswordHash: "x"})
+	two, _ := PermissionsFor(Principal{Kind: KindModule, Node: "two", Module: "dnsmasq", Holds: []Seat{seat}, PasswordHash: "x"})
+	has(t, one.Subscribe, "mesh.seat.node-dns-resolver.tool.lookup.one")
+	has(t, two.Subscribe, "mesh.seat.node-dns-resolver.tool.lookup.two")
+	hasNot(t, one.Subscribe, "mesh.seat.node-dns-resolver.tool.lookup")
+	hasNot(t, one.Subscribe, "mesh.seat.node-dns-resolver.tool.lookup.two")
+
+	user, _ := PermissionsFor(Principal{Kind: KindModule, Node: "three", Module: "asker", Uses: []Seat{seat}, PasswordHash: "x"})
+	has(t, user.Publish, "mesh.seat.node-dns-resolver.tool.lookup.*")
+}
+
+// A mesh-scoped seat's tool stays flat: nothing about it changes.
+func TestAMeshSeatsToolIsAddressedToTheSeatAlone(t *testing.T) {
+	seat := Seat{Name: "git", Scope: "mesh", Serves: []string{"list_repos"}}
+	holder, _ := PermissionsFor(Principal{Kind: KindModule, Node: "one", Module: "gitea", Holds: []Seat{seat}, PasswordHash: "x"})
+	has(t, holder.Subscribe, "mesh.seat.git.tool.list_repos")
+	user, _ := PermissionsFor(Principal{Kind: KindModule, Node: "two", Module: "asker", Uses: []Seat{seat}, PasswordHash: "x"})
+	has(t, user.Publish, "mesh.seat.git.tool.list_repos")
+}
+
+// The controller serves its own seat's verbs and may answer them (novox/hq ADR 0154).
+func TestTheControllerServesItsSeatsToolsAndMayAnswer(t *testing.T) {
+	perms, err := PermissionsFor(Principal{Kind: KindController, PasswordHash: "x"})
+	if err != nil {
+		t.Fatal(err)
+	}
+	has(t, perms.Subscribe, "mesh.seat.mesh-controller.tool.>")
+	if !perms.AllowResponses {
+		t.Fatal("the controller serves tools and may not answer one")
+	}
+}
+
+// A grant to every tool reaches a role's tools too, and a role's tool is granted by name.
+func TestAGrantReachesARolesTools(t *testing.T) {
+	all, _ := PermissionsFor(Principal{Kind: KindModule, Node: "desk", Module: "mesh-console", Invokes: []string{"*"}, PasswordHash: "x"})
+	has(t, all.Publish, "mesh.seat.*.tool.>")
+
+	one, err := PermissionsFor(Principal{Kind: KindPerson, Module: "jo", Invokes: []string{"seat:mesh-controller.status"}, PasswordHash: "x"})
+	if err != nil {
+		t.Fatal(err)
+	}
+	has(t, one.Publish, "mesh.seat.mesh-controller.tool.status")
+	hasNot(t, one.Publish, "mesh.seat.mesh-controller.tool.push")
+	hasNot(t, one.Publish, "mesh.mod.*.tool.>")
+
+	if _, err := PermissionsFor(Principal{Kind: KindPerson, Module: "jo", Invokes: []string{"seat:mesh-controller"}, PasswordHash: "x"}); err == nil {
+		t.Fatal("a role grant naming no verb was accepted")
+	}
+}

internal/broker/streams.go

@@ -79,7 +79,7 @@ func MeshStreams() []Stream {
 				"n-1 by construction (issue 107)",
 		},
 		{
-			Name: "EVENTS",
+			Name: EventsStream,
 			// A seat's own events ride here too: they are 1:many like any event, and the
 			// `event` token keeps them clear of both the seat's work queue (`accept`) and its
 			// tools (`tool`), which must not be persisted.
@@ -220,6 +220,9 @@ func seatEventSubject(seat, verb string) string {
 	return "mesh.seat." + seat + ".event." + verb
 }
 
+// EventsStream holds every module's and every role's events, a build's log among them.
+const EventsStream = "EVENTS"
+
 // MeshConsumers is what the controller consumes, in the order a person reads it.
 //
 // **Unlimited redelivery on CONTROL, deliberately.** The store window's bound is the controller's,
@@ -244,8 +247,13 @@ func MeshConsumers() []Consumer {
 			Push:           true,
 			AckWaitSeconds: 30,
 			MaxDeliver:     5,
-			Why: "the two events the mesh's own controller reacts to; after max-deliver it " +
+			// One at a time (novox/hq issue 175): acting on a merge builds for minutes, and an
-				"dead-letters, because an announcement it cannot act on will not become actionable",
+			// announcement handed over behind it must wait on the server, not time out on the
+			// client and come back to be acted on again.
+			MaxAckPending: 1,
+			Why: "the two events the mesh's own controller reacts to, one at a time; after " +
+				"max-deliver it dead-letters, because an announcement it cannot act on will not " +
+				"become actionable",
 		},
 	}
 }

internal/broker/streams_test.go

@@ -260,3 +260,14 @@ func TestNoTwoConsumersDeliverOntoTheSameSubject(t *testing.T) {
 		seen[subject] = c.Name + " on " + c.Stream
 	}
 }
+
+// The controller's events consumer is handed one announcement at a time (novox/hq issue 175): a
+// merge's handler builds for minutes, and what is queued behind it must wait on the server rather
+// than time out on the client and be acted on twice.
+func TestTheControllerTakesOneAnnouncementAtATime(t *testing.T) {
+	for _, c := range MeshConsumers() {
+		if c.Stream == "EVENTS" && c.Name == ControllerName && c.MaxAckPending != 1 {
+			t.Fatalf("the events consumer may have %d outstanding; one announcement at a time", c.MaxAckPending)
+		}
+	}
+}

internal/broker/testdata/composed.conf

@@ -25,7 +25,7 @@ accounts {
     users = [
       { user: "controller", password: "$2a$11$cccccccccccccccccccccc", permissions: {
         publish: { allow: ["$JS.ACK.CONTROL.controller.>", "$JS.ACK.EVENTS.controller.>", "$JS.API.>", "_INBOX.enrol.>", "mesh.control.>", "mesh.mod.*.tool.>", "mesh.node.>", "mesh.seat.mesh-build-machine.accept.>", "mesh.seat.mesh-controller.event.applied", "mesh.seat.mesh-controller.event.built-before", "mesh.seat.mesh-controller.event.refused"] }
-        subscribe: { allow: ["$JS.API.>", "_DELIVER.controller", "_DELIVER.controller.>", "_INBOX.controller.>", "mesh.control.>", "mesh.mod.gitea.event.pull.merged", "mesh.mod.mesh-catalog.event.catching-up", "mesh.mod.mesh-catalog.event.upgraded", "mesh.seat.mesh-build-machine.event.built"] }
+        subscribe: { allow: ["$JS.API.>", "_DELIVER.controller", "_DELIVER.controller.>", "_INBOX.controller.>", "mesh.control.>", "mesh.mod.gitea.event.pull.merged", "mesh.mod.mesh-catalog.event.catching-up", "mesh.mod.mesh-catalog.event.upgraded", "mesh.seat.mesh-build-machine.event.built", "mesh.seat.mesh-controller.tool.>"] }
         allow_responses: { max: 1, ttl: "1m" }
       } }
       { user: "enrol.one", password: "$2a$11$eeeeeeeeeeeeeeeeeeeeee", permissions: {

internal/builder/builder.go

@@ -90,7 +90,13 @@ type GitCredential struct {
 // records — reachable, unreferenced, and indistinguishable from something in use.
 func Build(ctx context.Context, run Runner, publish Publisher,
 	repository, path, ref, workspace string, held map[string]string, npmrc Npmrc,
-	forge GitCredential, log Log) (Result, error) {
+	forge GitCredential, log Log, seats ...map[string]string) (Result, error) {
+	// The clone base of each seat a context may name (novox/hq ADR 0155); variadic so the callers
+	// that hand none — tests of everything but contexts — read as they did.
+	var seatBases map[string]string
+	if len(seats) > 0 {
+		seatBases = seats[0]
+	}
 
 	say := logging(log)
 	say("clone", "%s%s at %s", repository, describePath(path), refOrHead(ref))
@@ -209,7 +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, 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
@@ -246,14 +252,18 @@ func logging(log Log) func(step, format string, args ...any) {
 // module's own repository — a fresh tree, the same way the module's own is, keyed by artifact
 // name so two artifacts of one module naming different contexts do not collide.
 func contextFrom(ctx context.Context, run Runner, workspace, artifact, credentials string,
-	from catalogue.ArtifactContext, say func(step, format string, args ...any)) (string, error) {
+	from catalogue.ArtifactContext, seats map[string]string, say func(step, format string, args ...any)) (string, error) {
-	say("context", "cloning %s at %s for %s", from.Repository, refOrHead(from.Ref), artifact)
+	url, err := contextURL(from, seats)
+	if err != nil {
+		return "", err
+	}
+	say("context", "cloning %s at %s for %s", url, refOrHead(from.Ref), artifact)
 	dir := filepath.Join(workspace, "context-"+artifact)
 	if err := os.RemoveAll(dir); err != nil {
 		return "", err
 	}
-	if _, err := run(ctx, workspace, "git", cloneWith(credentials, "clone", "--quiet", from.Repository, dir)...); err != nil {
+	if _, err := run(ctx, workspace, "git", cloneWith(credentials, "clone", "--quiet", url, dir)...); err != nil {
-		return "", fmt.Errorf("cannot clone %s: %w", from.Repository, err)
+		return "", fmt.Errorf("cannot clone %s: %w", url, err)
 	}
 	if from.Ref != "" {
 		if _, err := run(ctx, dir, "git", "checkout", "--quiet", from.Ref); err != nil {
@@ -264,6 +274,23 @@ func contextFrom(ctx context.Context, run Runner, workspace, artifact, credentia
 	return dir, nil
 }
 
+// contextURL is what a context is cloned from: its URL, or — for a context on a seat — the seat's
+// clone base the mesh sent with the request joined to the repository's path (novox/hq ADR 0155).
+// Refused, never guessed, when the mesh sent no base for that seat: a builder that guessed a forge
+// would be the literal this removes, one layer down.
+func contextURL(from catalogue.ArtifactContext, seats map[string]string) (string, error) {
+	if from.Seat == "" {
+		return from.Repository, nil
+	}
+	base, told := seats[from.Seat]
+	if !told || base == "" {
+		return "", fmt.Errorf("the context is %s on the %s seat, and this build was told no clone "+
+			"base for that seat — nothing holds it in this mesh, or the control plane predates the word",
+			from.Repository, from.Seat)
+	}
+	return strings.TrimRight(base, "/") + "/" + strings.TrimSuffix(strings.Trim(from.Repository, "/"), ".git") + ".git", nil
+}
+
 // cloneWith is a git invocation that may offer a stored credential.
 //
 // The first `-c credential.helper=` clears every helper the environment might carry, so exactly
@@ -416,7 +443,8 @@ 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, say func(step, format string, args ...any)) (catalogue.Built, error) {
+	held map[string]string, npmrc string, seats map[string]string,
+	say func(step, format string, args ...any)) (catalogue.Built, error) {
 
 	switch a.Kind {
 	case catalogue.ArtifactUpstream:
@@ -493,7 +521,7 @@ func one(ctx context.Context, run Runner, publish Publisher,
 		recipePath := a.From
 		buildDir := tree
 		if a.Context != nil {
-			cloned, err := contextFrom(ctx, run, workspace, a.Name, credentials, *a.Context, say)
+			cloned, err := contextFrom(ctx, run, workspace, a.Name, credentials, *a.Context, seats, say)
 			if err != nil {
 				return catalogue.Built{}, fmt.Errorf("%s: %s's context: %w", module, a.Name, err)
 			}
@@ -691,6 +719,21 @@ func short(commit string) string {
 	return commit
 }
 
+// Said is where the lines Command speaks go, beside the build's own Log: what runs, how long it
+// took, and that it failed. Nil prints them to stderr, as a build machine with nobody listening
+// should. The machine sets it per build so every line reaches the bus too (novox/hq ADR 0157) —
+// the step is "run", and the message is the line as it has always been printed.
+var Said Log
+
+func tell(step, format string, args ...any) {
+	message := fmt.Sprintf(format, args...)
+	if Said == nil {
+		fmt.Fprintf(os.Stderr, "  %s\n", message)
+		return
+	}
+	Said(step, message)
+}
+
 // Command is a Runner that actually runs things.
 func Command(ctx context.Context, dir, name string, args ...string) (string, error) {
 	// **Every command is echoed before it runs**, with where. On a build that hangs, the last line
@@ -698,16 +741,23 @@ func Command(ctx context.Context, dir, name string, args ...string) (string, err
 	// nothing" and "git clone is waiting on a network that will not answer". Silent on success is
 	// what made an empty workspace unreadable.
 	started := timeNow()
-	fmt.Fprintf(os.Stderr, "  $ (%s) %s %s\n", short(filepath.Base(dir)), name, strings.Join(args, " "))
+	tell("run", "$ (%s) %s %s", short(filepath.Base(dir)), name, strings.Join(args, " "))
 	cmd := exec.CommandContext(ctx, name, args...)
 	cmd.Dir = dir
 	out, err := cmd.CombinedOutput()
 	if err != nil {
-		fmt.Fprintf(os.Stderr, "  ! %s %s failed after %s\n", name, args[0], since(started))
+		tell("run", "! %s %s failed after %s", name, args[0], since(started))
+		// The command's own output is part of what a reader needs — the compiler's error, the
+		// clone's refusal — and a line per output line keeps it readable on the bus.
+		for _, line := range strings.Split(strings.TrimSpace(string(out)), "\n") {
+			if line != "" {
+				tell("output", "%s", line)
+			}
+		}
 		return string(out), fmt.Errorf("%s %s: %w\n%s",
 			name, strings.Join(args, " "), err, strings.TrimSpace(string(out)))
 	}
-	fmt.Fprintf(os.Stderr, "  ✓ %s %s (%s)\n", name, firstArg(args), since(started))
+	tell("run", "✓ %s %s (%s)", name, firstArg(args), since(started))
 	return string(out), nil
 }
 

internal/builder/context_test.go

@@ -0,0 +1,26 @@
+package builder
+
+import (
+	"strings"
+	"testing"
+
+	"github.com/novox/mesh-controller/internal/catalogue"
+)
+
+// A context on a seat is cloned from the base the mesh sent, joined to the repository's path; a
+// context by URL is itself; a seat the mesh sent no base for is refused by name (novox/hq ADR 0155).
+func TestAContextOnASeatIsClonedFromTheBaseTheMeshSent(t *testing.T) {
+	seats := map[string]string{"git": "http://forge.example.tld:3000"}
+	got, err := contextURL(catalogue.ArtifactContext{Seat: "git", Repository: "org/controller"}, seats)
+	if err != nil || got != "http://forge.example.tld:3000/org/controller.git" {
+		t.Fatalf("got %q, %v", got, err)
+	}
+	got, err = contextURL(catalogue.ArtifactContext{Repository: "https://elsewhere.example/x.git"}, seats)
+	if err != nil || got != "https://elsewhere.example/x.git" {
+		t.Fatalf("a URL context was changed: %q, %v", got, err)
+	}
+	_, err = contextURL(catalogue.ArtifactContext{Seat: "git", Repository: "org/controller"}, nil)
+	if err == nil || !strings.Contains(err.Error(), "git seat") {
+		t.Fatalf("a seat with no base was not refused by name: %v", err)
+	}
+}

internal/catalogue/artifact_store_alias_test.go

@@ -0,0 +1,18 @@
+package catalogue
+
+import "testing"
+
+// A claim written before the rename still holds (novox/hq ADR 0122, ADR 0156): with the store's
+// aliases loaded, the former name resolves to the seat.
+func TestTheArtifactStoresFormerNameResolvesToIt(t *testing.T) {
+	was := aliases
+	t.Cleanup(func() { aliases = was })
+	UseAliases(map[string]string{"the-artifact-store": "mesh-artifact-store"})
+	seat, known := SeatNamed("the-artifact-store")
+	if !known || seat.Name != "mesh-artifact-store" || seat.Delivers != "artifact-store" {
+		t.Fatalf("the former name did not resolve: %+v %v", seat, known)
+	}
+	if _, known := SeatNamed("mesh-artifact-store"); !known {
+		t.Fatal("the seat is not in the set under its name")
+	}
+}

internal/catalogue/artifact_store_seat_test.go

@@ -23,7 +23,7 @@ func TestASecondArtifactStoreAnywhereIsRefusedByName(t *testing.T) {
 	}
 
 	// A second one, on any other machine, is refused — and the refusal names the seat.
-	elsewhere := World{Held: []Held{{Claim: "the-artifact-store", Scope: ScopeMesh,
+	elsewhere := World{Held: []Held{{Claim: "mesh-artifact-store", Scope: ScopeMesh,
 		Node: "anchor", Module: "distribution"}}}
 	other := workstation()
 	other.Name = "laptop"
@@ -32,7 +32,7 @@ func TestASecondArtifactStoreAnywhereIsRefusedByName(t *testing.T) {
 		t.Fatal("a second store was accepted on another machine; it would offer artifact-store a " +
 			"second time and every consumer elsewhere would refuse to choose")
 	}
-	if !strings.Contains(err.Error(), "the-artifact-store") || !strings.Contains(err.Error(), "one per mesh") {
+	if !strings.Contains(err.Error(), "mesh-artifact-store") || !strings.Contains(err.Error(), "one per mesh") {
 		t.Fatalf("refused without naming the seat: %v", err)
 	}
 }

internal/catalogue/broker_seat_test.go

@@ -59,7 +59,7 @@ func TestRenamingASeatDidNotRenameTheInterfaceItDelivers(t *testing.T) {
 	for _, pair := range []struct{ seat, delivers string }{
 		{"git", "git"},
 		{"npm-package-registry", "npm-package-registry"},
-		{"the-artifact-store", "artifact-store"},
+		{"mesh-artifact-store", "artifact-store"},
 		{"mesh-store", "postgres-database"},
 		{"mesh-broker", "mesh-bus"},
 	} {

internal/catalogue/catalogue_check_test.go

@@ -3,6 +3,7 @@ package catalogue
 import (
 	"os"
 	"path/filepath"
+	"strings"
 	"testing"
 )
 
@@ -10,11 +11,24 @@ import (
 //
 // Not a fixture: the point is whether the manifests as written are accepted by the control plane that
 // will read them, and a copy of one manifest proves nothing about the other seventy-one.
-func TestEveryCatalogueManifestParses(t *testing.T) {
+// catalogueRoot is the catalogue these checks run over: MESH_CATALOGUE when set, else the checkout
-	root := os.Getenv("MESH_CATALOGUE")
+// beside this one, the way the main layout has it. A check that only ran when somebody remembered a
-	if root == "" {
+// variable was a check nobody ran (novox/hq issue 134, 2026-09-30); it skips only when there is no
-		t.Skip("set MESH_CATALOGUE to a catalogue checkout to run this")
+// catalogue to be found at all.
+func catalogueRoot(t *testing.T) string {
+	t.Helper()
+	if root := os.Getenv("MESH_CATALOGUE"); root != "" {
+		return root
 	}
+	sibling := filepath.Join("..", "..", "..", "mesh-catalog")
+	if _, err := os.Stat(filepath.Join(sibling, "modules")); err != nil {
+		t.Skip("no catalogue beside this checkout and MESH_CATALOGUE unset")
+	}
+	return sibling
+}
+
+func TestEveryCatalogueManifestParses(t *testing.T) {
+	root := catalogueRoot(t)
 	found, err := filepath.Glob(filepath.Join(root, "modules", "*", "module.json"))
 	if err != nil || len(found) == 0 {
 		t.Fatalf("no manifests under %s: %v", root, err)
@@ -45,3 +59,30 @@ func TestEveryCatalogueManifestParses(t *testing.T) {
 		t.Fatal("no endpoint in the catalogue is named, so this proved nothing")
 	}
 }
+
+// TestNoCatalogueManifestNamesAnInstallation is ADR 0112's check, run over the real catalogue: no
+// definition names a domain or a public address the mesh acts on, and every value that must for now
+// carries its reason (novox/hq ADR 0155, issue 134). The list it prints is the one that shrinks.
+func TestNoCatalogueManifestNamesAnInstallation(t *testing.T) {
+	root := catalogueRoot(t)
+	found, err := filepath.Glob(filepath.Join(root, "modules", "*", "module.json"))
+	if err != nil || len(found) == 0 {
+		t.Fatalf("no manifests under %s: %v", root, err)
+	}
+	var named []string
+	for _, p := range found {
+		raw, err := os.ReadFile(p)
+		if err != nil {
+			t.Fatalf("%s: %v", p, err)
+		}
+		m, err := ParseManifest(raw)
+		if err != nil {
+			t.Errorf("%s: %v", p, err)
+			continue
+		}
+		named = append(named, InstallationProblems(m)...)
+	}
+	if len(named) > 0 {
+		t.Fatalf("%d value(s) name an installation:\n  %s", len(named), strings.Join(named, "\n  "))
+	}
+}

internal/catalogue/contributes_test.go

@@ -197,6 +197,27 @@ func TestARouteCanBeSetPerMesh(t *testing.T) {
 	}
 }
 
+func TestASettingReachesAContributionOnlyWhereItDeclaresTheKey(t *testing.T) {
+	// novox/hq 04-ISSUES/173: the mail module's site name, set so its environment file could read
+	// it, arrived in every route it contributed. A setting overrides a key the contribution
+	// declares and adds none — the provider reads the contribution as a contract.
+	got, _ := Resolve(shelf(proxy(), published("board", "board", 8080)), []string{"board"}, workstation(), World{})
+
+	out, err := got.Declaration(Rendering{Settings: SettingsBy{
+		"board": {{From: "the mesh", Values: map[string]any{"host": "dashboard", "sitename": "Board"}}},
+	}})
+	if err != nil {
+		t.Fatal(err)
+	}
+	given := received(t, out)
+	if given[0].Values["host"] != "dashboard" {
+		t.Fatalf("the setting did not override the route's host: %v", given[0].Values)
+	}
+	if _, leaked := given[0].Values["sitename"]; leaked {
+		t.Fatalf("a setting the route never declared reached the proxy: %v", given[0].Values)
+	}
+}
+
 func TestReceivingWhatYouDoNotProvideIsRefused(t *testing.T) {
 	// It would create a file nobody ever writes to, on a machine where nothing asked for it.
 	_, err := ParseManifest([]byte(`{"module":"traefik","version":"1",

internal/catalogue/declaration.go

@@ -465,7 +465,7 @@ func (r Resolution) compose(with Rendering, owner map[string]string) ([]map[stri
 					"%s needs a secret called %q and none was made for it", m.Module, name)
 			}
 			first = append(first, ownedBy(m.SecretsOwner, map[string]any{
-				"id": NeedID(name), "type": "file", "path": m.OwnSecrets[name], "sealed": sealed,
+				"id": NeedID(name), "type": "file", "path": m.OwnSecrets[name].Path, "sealed": sealed,
 			}))
 		}
 		// Operator-owned paths this module is granted use of (novox/hq ADR 0051). Written before
@@ -473,9 +473,15 @@ func (r Resolution) compose(with Rendering, owner map[string]string) ([]map[stri
 		// find each present — refusing clearly if the operator has not provided it — before it
 		// starts anything that depends on it. The mesh creates, chowns and reconciles none of it;
 		// an `access` resource says only *this path must exist, and this module reaches it*.
-		for _, a := range m.Accesses {
+		// Where each is on THIS machine is the assignment's (novox/hq issue 153): placed by id
+		// where the operator said, the definition's default otherwise, refused where neither.
+		accesses, accessPaths, err := accessesFor(m, with.Settings[m.Module])
+		if err != nil {
+			return nil, err
+		}
+		for _, a := range accesses {
 			first = append(first, map[string]any{
-				"id": AccessID(a.Path), "type": "access", "path": a.Path, "mode": a.At(),
+				"id": AccessID(a.Path), "type": "access", "path": a.Path, "mode": a.Mode,
 			})
 		}
 		for _, to := range m.SecretRequirements() {
@@ -670,6 +676,12 @@ func (r Resolution) compose(with Rendering, owner map[string]string) ([]map[stri
 		}
 		// And where this node places the directories the module declared without a path
 		// (novox/hq ADR 0112) — resolved once per module, named by ${dir:…} from any resource.
+		// — and, on an adopted machine, where the assignment says they already are, with the
+		// owner the data already has (novox/hq issue 153). Malformed placements are refused here.
+		placed, err := Places(m, with.Settings[m.Module])
+		if err != nil {
+			return nil, err
+		}
 		dirs := dirsFor(m, with)
 		// And the machine underneath, which no binding of its own can tell it.
 		thisMachine := machineFacts(r, with.Names, with.MeshRange)
@@ -696,6 +708,13 @@ func (r Resolution) compose(with Rendering, owner map[string]string) ([]map[stri
 			// Said in the catalogue, not on the machine: the host parses strictly and knows no
 			// such field, and the reason is for a reader of the manifest.
 			delete(copied, SecretsInEnvironment)
+			delete(copied, NamesOnPurpose)
+			// **An operator's value, from the assignment** (novox/hq ADR 0112, ADR 0155): what a
+			// definition may not carry because it is true of one installation only. Filled from
+			// the same layers a mergeable file takes, and refused when no layer set it.
+			if err := settingInto(copied, with.Settings[m.Module], m.Module); err != nil {
+				return nil, err
+			}
 			// **Placed before anything reads a path.** A pathless directory receives the path
 			// this node resolves for it, and every ${dir:…} — in paths, mounts, content and
 			// environment — becomes that path, so what follows sees only concrete places
@@ -703,6 +722,12 @@ func (r Resolution) compose(with Rendering, owner map[string]string) ([]map[stri
 			if err := dirInto(copied, dirs, m.Module); err != nil {
 				return nil, err
 			}
+			// The operator's data the same way: ${access:…} becomes where this node keeps it,
+			// and a placed directory takes the owner the assignment said (issue 153).
+			if err := accessInto(copied, accessPaths, m.Module); err != nil {
+				return nil, err
+			}
+			ownerInto(copied, placed)
 			// **After settings, and that is the whole reason it is here.** A module's file
 			// content is where a setting lands, so a placeholder may only exist once the setting
 			// has been put in — filling secrets first would look at content that is not yet what
@@ -1154,7 +1179,10 @@ func (r Resolution) contributions(settings SettingsBy, grants []Grant,
 // module wrote another into its configuration.
 func (r Resolution) composed(m Manifest, to string, raw map[string]any, layers []Layer, what string) (
 	map[string]any, error) {
-	values, err := settle(raw, layers, nil, what)
+	// Overridden, not merged: a setting changes a key the contribution declares and adds none.
+	// The provider reads the contribution as a contract, and a setting made for one of this
+	// module's files is no part of it (novox/hq 04-ISSUES/173).
+	values, err := overridden(raw, layers, what)
 	if err != nil {
 		return nil, fmt.Errorf("%s: %w", what, err)
 	}

internal/catalogue/dir_into.go

@@ -20,6 +20,12 @@ import (
 // declared with the path as the exception it is, and everything else in the module names it by
 // id — so moving it later is one line, not a search.
 //
+// **The mesh's own files for a module are placed too** (novox/hq issue 174). What the mesh writes
+// *for* a module — its sealed bus credential, its merged configuration, its bindings — is the
+// mesh's plumbing, not the module's data, and sits under `<root>/mesh/<module>`. A directory
+// saying `"place": "mesh"` is that place; the definition names the files beneath it by
+// `${dir:<id>}` and states no path.
+//
 // **Resolved here, not on the machine.** The host receives concrete paths exactly as it always
 // has; nothing new reaches it and it learns no field. Which also means a resolved path changing
 // is a spec change like any other — and the spec comparison must see it (novox/hq issue 126).
@@ -27,6 +33,15 @@ import (
 // defaultDataRoot is where module data lands when a node states no root of its own.
 const defaultDataRoot = "/var/lib"
 
+// The two places a pathless directory may name, beside its own id.
+const (
+	// placeOwn is the assignment's own root, <root>/<module> — to-be 27's one directory per
+	// assignment, which every other placed thing of the module sits beneath.
+	placeOwn = "."
+	// placeMesh is where the mesh keeps what it writes for the module, <root>/mesh/<module>.
+	placeMesh = "mesh"
+)
+
 // dirRef is how a module names one of its placed directories: ${dir:<id>}.
 var dirRef = regexp.MustCompile(`\$\{dir:([a-z0-9][a-z0-9-]*)\}`)
 
@@ -40,27 +55,54 @@ func dataRoot(with Rendering) string {
 
 // dirsFor is every placed directory of a module, id → the path it resolves to on this node.
 //
-// A pathless directory saying `"place": "."` is the assignment's own root, <root>/<module> —
+// A pathless directory saying `"place": "."` is the assignment's own root, <root>/<module>; one
-// to-be 27's one directory per assignment, which every other placed thing sits beneath. At most
+// saying `"place": "mesh"` is the mesh's directory for the module, <root>/mesh/<module>; one
-// one makes sense; nothing enforces one, because two ids resolving to one path is a mistake the
+// saying neither is <root>/<module>/<id>. At most one of each place makes sense; nothing enforces
-// module's own files make visible immediately.
+// one, because two ids resolving to one path is a mistake the module's own files make visible
+// immediately.
+//
+// A stated path may itself begin with a placed reference — `${dir:mesh-state}/state` — and is
+// filled after the directories it can name are resolved; one level, because a directory beneath
+// a placed one is the whole of what an adopted layout needs (issue 174's `state` and `out`).
 func dirsFor(m Manifest, with Rendering) map[string]string {
 	dirs := map[string]string{}
+	var beneath []map[string]any
+	// The assignment's placement wins over both (novox/hq issue 153). Refused elsewhere when
+	// malformed; here an invalid setting simply places nothing.
+	placed, _ := Places(m, with.Settings[m.Module])
 	for _, r := range m.Resources {
 		if fmt.Sprint(r["type"]) != "directory" {
 			continue
 		}
 		id := fmt.Sprint(r["id"])
+		if p, said := placed[id]; said {
+			dirs[id] = p.Path
+			continue
+		}
 		if path, stated := r["path"].(string); stated && path != "" {
+			if strings.HasPrefix(path, "${dir:") {
+				beneath = append(beneath, r)
+				continue
+			}
 			dirs[id] = strings.TrimRight(path, "/")
 			continue
 		}
-		if place, said := r["place"].(string); said && place == "." {
+		switch place, _ := r["place"].(string); place {
+		case placeOwn:
 			dirs[id] = dataRoot(with) + "/" + m.Module
-			continue
+		case placeMesh:
-		}
+			dirs[id] = dataRoot(with) + "/mesh/" + m.Module
+		default:
 			dirs[id] = dataRoot(with) + "/" + m.Module + "/" + id
 		}
+	}
+	for _, r := range beneath {
+		path := strings.TrimRight(r["path"].(string), "/")
+		// A reference to no directory is left as written and refused where the resource is
+		// placed (dirInto), with the message that names what exists.
+		filled, _ := dirFill(path, dirs, m.Module)
+		dirs[fmt.Sprint(r["id"])] = filled
+	}
 	return dirs
 }
 
@@ -119,9 +161,17 @@ func placedManifest(m Manifest, with Rendering) (Manifest, error) {
 	if m.Secrets, err = fillMap(m.Secrets); err != nil {
 		return m, err
 	}
-	if m.OwnSecrets, err = fillMap(m.OwnSecrets); err != nil {
+	if len(m.OwnSecrets) > 0 {
+		own := make(OwnSecrets, len(m.OwnSecrets))
+		for name, s := range m.OwnSecrets {
+			filled, err := dirFill(s.Path, dirs, m.Module)
+			if err != nil {
 				return m, err
 			}
+			own[name] = OwnSecret{Path: filled, Taken: s.Taken}
+		}
+		m.OwnSecrets = own
+	}
 	if m.Grants, err = fillMap(m.Grants); err != nil {
 		return m, err
 	}
@@ -244,10 +294,11 @@ func (m Manifest) unknownDirRefs() []string {
 				"%s states both path and place on %v — a stated path IS the placement",
 				m.Module, r["id"]))
 		}
-		if place != "." {
+		if place != placeOwn && place != placeMesh {
 			problems = append(problems, fmt.Sprintf(
-				"%s says place %q on %v, and the only place is %q — the assignment's own root",
+				"%s says place %q on %v, and the places are %q — the assignment's own root — and "+
-				m.Module, place, r["id"], "."))
+					"%q — where the mesh keeps what it writes for the module",
+				m.Module, place, r["id"], placeOwn, placeMesh))
 		}
 	}
 	seen := map[string]bool{}
@@ -292,7 +343,7 @@ func (m Manifest) unknownDirRefs() []string {
 	}
 	maps := map[string]map[string]string{
 		"receives": m.Receives, "binds": m.Binds, "secrets": m.Secrets,
-		"own-secrets": m.OwnSecrets, "grants": m.Grants,
+		"own-secrets": m.OwnSecrets.Paths(), "grants": m.Grants,
 	}
 	for field, entries := range maps {
 		for _, value := range entries {

internal/catalogue/dir_into_test.go

@@ -164,7 +164,7 @@ func TestTheManifestsMapsArePlaced(t *testing.T) {
 		},
 		Binds:      map[string]string{"route": "${dir:state}/route.json"},
 		Secrets:    map[string]string{"mongodb-database": "${dir:state}/database.secret"},
-		OwnSecrets: map[string]string{"admin-key": "${dir:state}/admin-key.secret"},
+		OwnSecrets: OwnSecrets{"admin-key": {Path: "${dir:state}/admin-key.secret"}},
 		Receives:   map[string]string{"route": "${dir:state}/grants/mesh.json"},
 	}
 	placed, err := placedManifest(m, Rendering{})
@@ -177,7 +177,7 @@ func TestTheManifestsMapsArePlaced(t *testing.T) {
 	if placed.Secrets["mongodb-database"] != "/var/lib/photos/database.secret" {
 		t.Fatalf("secrets are placed; got %v", placed.Secrets)
 	}
-	if placed.OwnSecrets["admin-key"] != "/var/lib/photos/admin-key.secret" {
+	if placed.OwnSecrets["admin-key"].Path != "/var/lib/photos/admin-key.secret" {
 		t.Fatalf("own-secrets are placed; got %v", placed.OwnSecrets)
 	}
 	if placed.Receives["route"] != "/var/lib/photos/grants/mesh.json" {
@@ -216,8 +216,48 @@ func TestPlaceIsValidatedAtTheManifest(t *testing.T) {
 	wrong := Manifest{Module: "x", Resources: []map[string]any{
 		{"id": "d", "type": "directory", "place": "sub/dir"},
 	}}
-	if got := wrong.unknownDirRefs(); len(got) != 1 || !strings.Contains(got[0], `the only place is "."`) {
+	if got := wrong.unknownDirRefs(); len(got) != 1 || !strings.Contains(got[0], `the places are "."`) {
-		t.Fatalf("a place that is not the root refuses; got %v", got)
+		t.Fatalf("a place that is neither root refuses; got %v", got)
+	}
+}
+
+func TestTheMeshsDirectoryForAModuleIsAPlace(t *testing.T) {
+	// novox/hq issue 174. What the mesh writes for a module — its bus credential, its bindings —
+	// is the mesh's plumbing under <root>/mesh/<module>, and the definition names it by id.
+	m := Manifest{Module: "umami",
+		Resources: []map[string]any{
+			{"id": "mesh-state", "type": "directory", "place": "mesh"},
+			{"id": "state", "type": "directory", "place": "."},
+			{"id": "server", "type": "container", "image": "x@sha256:aa",
+				"volumes": []any{"${dir:mesh-state}/broker:/run/secrets/broker:ro"}},
+		},
+		OwnSecrets: OwnSecrets{"broker": {Path: "${dir:mesh-state}/broker"}},
+		Binds:      map[string]string{"route": "${dir:state}/route.json"},
+	}
+	if got := m.unknownDirRefs(); len(got) != 0 {
+		t.Fatalf("place %q is a place; got %v", "mesh", got)
+	}
+	dirs := dirsFor(m, Rendering{})
+	if dirs["mesh-state"] != "/var/lib/mesh/umami" || dirs["state"] != "/var/lib/umami" {
+		t.Fatalf("the mesh's directory sits beside the module's, not in it; got %v", dirs)
+	}
+	dirs = dirsFor(m, Rendering{DataRoot: "/srv"})
+	if dirs["mesh-state"] != "/srv/mesh/umami" {
+		t.Fatalf("a node's root moves the mesh's files with the module's; got %v", dirs)
+	}
+	placed, err := placedManifest(m, Rendering{})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if placed.OwnSecrets["broker"].Path != "/var/lib/mesh/umami/broker" {
+		t.Fatalf("own-secrets are placed under the mesh's directory; got %v", placed.OwnSecrets)
+	}
+	container := shallowCopy(m.Resources[2])
+	if err := dirInto(container, dirsFor(m, Rendering{}), m.Module); err != nil {
+		t.Fatal(err)
+	}
+	if container["volumes"].([]any)[0] != "/var/lib/mesh/umami/broker:/run/secrets/broker:ro" {
+		t.Fatalf("the mount's host side is placed; got %v", container["volumes"])
 	}
 }
 
@@ -250,3 +290,36 @@ func shallowCopy(resource map[string]any) map[string]any {
 	}
 	return copied
 }
+
+func TestADirectoryBeneathAPlacedOneIsPlacedWithIt(t *testing.T) {
+	// An adopted layout keeps a subdirectory the predecessor made under the mesh's directory
+	// (issue 174: a forge's runtime state, a manager's output). Stated as beneath the placed one,
+	// it moves with it — a node's root moves both, and the definition names no host path.
+	m := Manifest{Module: "gitea", Resources: []map[string]any{
+		{"id": "mesh-state", "type": "directory", "place": "mesh"},
+		{"id": "runtime-state", "type": "directory", "path": "${dir:mesh-state}/state"},
+		{"id": "server", "type": "container", "image": "x@sha256:aa",
+			"volumes": []any{"${dir:runtime-state}:/data"}},
+	}}
+	if got := m.unknownDirRefs(); len(got) != 0 {
+		t.Fatalf("a path beneath a placed directory is well formed; got %v", got)
+	}
+	dirs := dirsFor(m, Rendering{DataRoot: "/srv"})
+	if dirs["runtime-state"] != "/srv/mesh/gitea/state" {
+		t.Fatalf("the subdirectory follows the placed one; got %v", dirs)
+	}
+	sub := shallowCopy(m.Resources[1])
+	if err := dirInto(sub, dirs, m.Module); err != nil {
+		t.Fatal(err)
+	}
+	if sub["path"] != "/srv/mesh/gitea/state" {
+		t.Fatalf("the directory resource itself is resolved; got %v", sub["path"])
+	}
+	container := shallowCopy(m.Resources[2])
+	if err := dirInto(container, dirs, m.Module); err != nil {
+		t.Fatal(err)
+	}
+	if container["volumes"].([]any)[0] != "/srv/mesh/gitea/state:/data" {
+		t.Fatalf("a reference to the subdirectory resolves whole; got %v", container["volumes"])
+	}
+}

internal/catalogue/filtering_test.go

@@ -419,7 +419,7 @@ func TestWhatTheMeshComputesIsAppliedBeforeWhatTheModuleDeclared(t *testing.T) {
 func TestAComputedModuleStillGetsWhatTheMeshMadeForIt(t *testing.T) {
 	r := Resolution{Modules: []Manifest{{
 		Module: "networking", Computed: "mesh-network",
-		OwnSecrets: map[string]string{"key": "/var/lib/mesh/key"},
+		OwnSecrets: OwnSecrets{"key": {Path: "/var/lib/mesh/key"}},
 	}}}
 	out, err := r.Declaration(Rendering{
 		Needed:     map[string]map[string]string{"networking": {"key": "sealed"}},

internal/catalogue/installation.go

@@ -0,0 +1,227 @@
+package catalogue
+
+import (
+	"encoding/json"
+	"fmt"
+	"net"
+	"regexp"
+	"sort"
+	"strings"
+)
+
+// A definition names no installation (novox/hq ADR 0112, ADR 0155, issues 122 and 134).
+//
+// A module definition holds what is true of the module everywhere; what is particular to one mesh —
+// a public name, a forge's address, a node's public address — is resolved at assignment. The rule
+// stood for a month with nothing checking it, and a sweep found thirty of seventy-one definitions
+// naming the installation they were written in. This is the check.
+//
+// **What is judged is what the mesh acts on, not what a person reads.** A domain in a `why` or a
+// `description` is documentation the mesh never reads; reporting it beside `KC_HOSTNAME` would teach
+// people to ignore the report. What is judged is every other string value: a name under a public
+// top-level domain, or a public address. Two families of name are the world's and not this mesh's,
+// and are allowed where they can only mean the world: the public registries an `image` may be pulled
+// from, and the public resolvers a machine may forward to. The container runtime's own alias for
+// its host is the runtime's, true on every machine that runs it.
+//
+// **A name that is right where it stands is declared, one by one, with its reason.** A federated
+// server's config names the federation's public directory; an application built outside the mesh
+// is pulled from the registry that built it, until the mesh builds it. The resource carries
+// `names-on-purpose`, a map from each such name to why — the shape `secrets-in-environment` has,
+// per name — so a reader sees which names a definition means to carry and why, a name the map does
+// not cover is still reported, and the catalogue-wide test is the list that shrinks as names move.
+
+// NamesOnPurpose is the catalogue-level word a resource carries for the names it means to name:
+// each name mapped to its reason. The host never sees it.
+const NamesOnPurpose = "names-on-purpose"
+
+// prose is every key whose value the mesh never reads.
+var prose = map[string]bool{"why": true, "description": true}
+
+// Registries the world runs, which an image may name because an image reference must say where it
+// is pulled from. Anything else in an image reference is a registry of some installation.
+var worldsRegistries = map[string]bool{
+	"docker.io": true, "registry-1.docker.io": true, "index.docker.io": true, "ghcr.io": true,
+	"quay.io": true, "gcr.io": true, "registry.k8s.io": true, "k8s.gcr.io": true,
+	"mcr.microsoft.com": true, "lscr.io": true, "public.ecr.aws": true, "registry.gitlab.com": true,
+	"codeberg.org": true, "cgr.dev": true,
+}
+
+// Services the world runs that a definition may name as a policy default, the way it may name a
+// public resolver: the public certificate authorities' ACME directories. Anything else a served
+// fact or a file names is somebody's installation.
+var worldsServices = map[string]bool{
+	"acme-v02.api.letsencrypt.org": true, "acme-staging-v02.api.letsencrypt.org": true,
+	"api.buypass.com": true, "api.test4.buypass.no": true, "dv.acme-v02.api.pki.goog": true,
+	"acme.zerossl.com": true,
+}
+
+// Resolvers the world runs, which a machine's resolver may forward to as a policy default.
+var worldsResolvers = map[string]bool{
+	"1.1.1.1": true, "1.0.0.1": true, "8.8.8.8": true, "8.8.4.4": true, "9.9.9.9": true,
+	"149.112.112.112": true, "208.67.222.222": true, "208.67.220.220": true,
+}
+
+// hostname is a dotted name whose last label is a top-level domain a real installation would have.
+// Not every dotted token: `module.json`, `index.html` and `docker.sock` are dotted and name nothing.
+// Boundaries are checked by hand rather than in the pattern, because two names one character apart
+// — `a.example.tld,b.example.tld` — would otherwise share the delimiter and the second would be lost.
+var hostname = regexp.MustCompile(
+	`(?i)(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+` +
+		`(?:be|nl|de|fr|uk|eu|com|net|org|io|dev|app|cloud|site|online|me|co|ch|at|lu|` +
+		`internal|example|tld|test|invalid)`)
+
+// address is a dotted quad.
+var address = regexp.MustCompile(`(?:[0-9]{1,3}\.){3}[0-9]{1,3}`)
+
+// isName is whether a byte may be part of a name; a match bordered by one is a longer token.
+func isName(b byte) bool {
+	return b == '.' || b == '-' || (b >= 'a' && b <= 'z') || (b >= 'A' && b <= 'Z') || (b >= '0' && b <= '9')
+}
+
+// standalone are the matches of re in value that are whole tokens, not parts of a longer one.
+func standalone(re *regexp.Regexp, value string) []string {
+	var out []string
+	for _, span := range re.FindAllStringIndex(value, -1) {
+		if span[0] > 0 && isName(value[span[0]-1]) {
+			continue
+		}
+		if span[1] < len(value) && isName(value[span[1]]) {
+			continue
+		}
+		out = append(out, value[span[0]:span[1]])
+	}
+	return out
+}
+
+// InstallationProblems is every value of a definition that names an installation, in the
+// definition's own words: where it is, and what it names.
+func InstallationProblems(m Manifest) []string {
+	raw, err := json.Marshal(m)
+	if err != nil {
+		return []string{fmt.Sprintf("%s could not be read back: %v", m.Module, err)}
+	}
+	var tree any
+	if err := json.Unmarshal(raw, &tree); err != nil {
+		return []string{fmt.Sprintf("%s could not be read back: %v", m.Module, err)}
+	}
+	var problems []string
+	// The module's own name is a value too: a module named after the domain it serves is a
+	// definition that can only be installed there (issue 134).
+	for _, name := range namesIn(m.Module) {
+		problems = append(problems, fmt.Sprintf(
+			"%s is named after %s, and a module is named for what it is, not for where it runs", m.Module, name))
+	}
+	walk(tree, "", nil, func(at string, value string, meant map[string]bool, isImage bool) {
+		for _, name := range namesIn(value) {
+			if (isImage && worldsRegistries[strings.ToLower(name)]) || meant[name] {
+				continue
+			}
+			problems = append(problems, fmt.Sprintf("%s names %s at %s", m.Module, name, at))
+		}
+		for _, ip := range addressesIn(value) {
+			if meant[ip] {
+				continue
+			}
+			problems = append(problems, fmt.Sprintf("%s names the public address %s at %s", m.Module, ip, at))
+		}
+	})
+	sort.Strings(problems)
+	return problems
+}
+
+// walk visits every string in the tree with its path, the names the enclosing resource means to
+// name (with a reason), and whether it is an image reference.
+func walk(node any, at string, meant map[string]bool, visit func(at, value string, meant map[string]bool, isImage bool)) {
+	switch v := node.(type) {
+	case map[string]any:
+		if declared, has := v[NamesOnPurpose].(map[string]any); has {
+			widened := map[string]bool{}
+			for name := range meant {
+				widened[name] = true
+			}
+			for name, reason := range declared {
+				if r, ok := reason.(string); ok && strings.TrimSpace(r) != "" {
+					widened[strings.ToLower(name)] = true
+				}
+			}
+			meant = widened
+		}
+		keys := make([]string, 0, len(v))
+		for k := range v {
+			keys = append(keys, k)
+		}
+		sort.Strings(keys)
+		for _, k := range keys {
+			if prose[k] || k == NamesOnPurpose || (at == "" && k == "module") {
+				continue
+			}
+			child := at + "." + k
+			if at == "" {
+				child = k
+			}
+			if s, isString := v[k].(string); isString {
+				visit(child, s, meant, k == "image")
+				continue
+			}
+			walk(v[k], child, meant, visit)
+		}
+	case []any:
+		for i, item := range v {
+			child := fmt.Sprintf("%s[%d]", at, i)
+			if s, isString := item.(string); isString {
+				visit(child, s, meant, false)
+				continue
+			}
+			walk(item, child, meant, visit)
+		}
+	}
+}
+
+// namesIn is every hostname in a value that could belong to an installation.
+func namesIn(value string) []string {
+	var out []string
+	for _, found := range standalone(hostname, value) {
+		name := strings.ToLower(found)
+		switch {
+		case strings.HasSuffix(name, ".docker.internal"):
+			// The container runtime's alias for its own host: every machine running it has one.
+		case worldsServices[name]:
+			// A public authority named as a policy default, true of any mesh that wants it.
+		case name == "example.tld", strings.HasSuffix(name, ".example.tld"),
+			name == "example.com", name == "example.net", name == "example.org",
+			strings.HasSuffix(name, ".example.com"), strings.HasSuffix(name, ".example.net"),
+			strings.HasSuffix(name, ".example.org"), strings.HasSuffix(name, ".example"),
+			strings.HasSuffix(name, ".test"), strings.HasSuffix(name, ".invalid"):
+			// Documentation names, which is what a definition's own example should use.
+		default:
+			out = append(out, name)
+		}
+	}
+	return out
+}
+
+// addressesIn is every public address in a value: not a private range, loopback, link-local, the
+// unspecified address, a documentation range, or a resolver the world runs.
+func addressesIn(value string) []string {
+	var out []string
+	for _, found := range standalone(address, value) {
+		ip := net.ParseIP(found)
+		if ip == nil || ip.IsPrivate() || ip.IsLoopback() || ip.IsLinkLocalUnicast() ||
+			ip.IsUnspecified() || ip.IsMulticast() || worldsResolvers[found] || documentation(ip) {
+			continue
+		}
+		out = append(out, found)
+	}
+	return out
+}
+
+func documentation(ip net.IP) bool {
+	for _, cidr := range []string{"192.0.2.0/24", "198.51.100.0/24", "203.0.113.0/24", "100.64.0.0/10"} {
+		_, block, _ := net.ParseCIDR(cidr)
+		if block.Contains(ip) {
+			return true
+		}
+	}
+	return false
+}

internal/catalogue/installation_test.go

@@ -0,0 +1,93 @@
+package catalogue
+
+import (
+	"strings"
+	"testing"
+)
+
+// A definition names no installation (novox/hq ADR 0112, ADR 0155). What the mesh acts on is judged;
+// prose is not; the world's registries and resolvers are the world's; a declared exception is a
+// reason a reader sees.
+func TestADefinitionNamingAnInstallationIsNamedBack(t *testing.T) {
+	m := Manifest{Module: "idp", Resources: []map[string]any{
+		{"id": "server", "type": "container", "image": "quay.io/keycloak/keycloak@sha256:aa",
+			"env": map[string]any{"KC_HOSTNAME": "https://login.mesh-one.be"}},
+		{"id": "env", "type": "file", "content": "REAL_IP_FROM=192.168.1.0/24,127.0.0.0/8,203.0.113.7,51.15.22.9\n"},
+	}, Listens: []Listening{{Port: 8080, From: FromMesh, Why: "the login page; login.mesh-one.be is a route grant"}}}
+	got := strings.Join(InstallationProblems(m), "\n")
+	for _, want := range []string{
+		"idp names login.mesh-one.be at resources[0].env.KC_HOSTNAME",
+		"idp names the public address 51.15.22.9 at resources[1].content",
+	} {
+		if !strings.Contains(got, want) {
+			t.Errorf("missing %q in:\n%s", want, got)
+		}
+	}
+	for _, mustNot := range []string{"quay.io", "why", "203.0.113.7", "192.168.1.0", "127.0.0.0"} {
+		if strings.Contains(got, mustNot) {
+			t.Errorf("%q was reported and should not be:\n%s", mustNot, got)
+		}
+	}
+}
+
+func TestTheWorldsNamesAreNotAnInstallations(t *testing.T) {
+	m := Manifest{Module: "resolver", Resources: []map[string]any{
+		{"id": "conf", "type": "file", "content": "server=1.1.1.1\nserver=8.8.8.8\nlisten=127.0.0.55\n"},
+		{"id": "proxy", "type": "container", "image": "docker.io/library/traefik@sha256:bb"},
+		{"id": "adapter", "type": "file", "content": "{\"machine\": \"host.docker.internal\"}\n"},
+		{"id": "doc", "type": "file", "content": "root = https://git.example.tld/\n"},
+	}}
+	if got := InstallationProblems(m); len(got) != 0 {
+		t.Fatalf("the world's names were reported: %v", got)
+	}
+}
+
+func TestANameMeantOnPurposeIsDeclaredWithItsReason(t *testing.T) {
+	// The federation's public directory in a homeserver's config: the world's, said so, and a name
+	// the map does not cover is still reported.
+	m := Manifest{Module: "homeserver", Resources: []map[string]any{
+		{"id": "conf", "type": "file", "content": "trusted_key_servers: matrix.org\nwell_known: https://mesh-one.be\n",
+			NamesOnPurpose: map[string]any{"matrix.org": "the federation's public key server, the world's"}},
+	}}
+	got := InstallationProblems(m)
+	if len(got) != 1 || !strings.Contains(got[0], "mesh-one.be") {
+		t.Fatalf("got %v", got)
+	}
+}
+
+func TestAnImageFromAnInstallationsRegistryNeedsAReason(t *testing.T) {
+	bare := Manifest{Module: "site", Resources: []map[string]any{
+		{"id": "server", "type": "container", "image": "registry.mesh-one.be/org/site@sha256:cc"},
+	}}
+	if got := InstallationProblems(bare); len(got) != 1 || !strings.Contains(got[0], "registry.mesh-one.be") {
+		t.Fatalf("an image on an installation's registry was not named: %v", got)
+	}
+	excepted := Manifest{Module: "site", Resources: []map[string]any{
+		{"id": "server", "type": "container", "image": "registry.mesh-one.be/org/site@sha256:cc",
+			NamesOnPurpose: map[string]any{"registry.mesh-one.be": "built outside the mesh until the site's repository is a build source here"}},
+	}}
+	if got := InstallationProblems(excepted); len(got) != 0 {
+		t.Fatalf("a declared exception was still reported: %v", got)
+	}
+}
+
+func TestAModuleNamedAfterADomainIsNamedBack(t *testing.T) {
+	got := InstallationProblems(Manifest{Module: "mesh-one.be"})
+	if len(got) != 1 || !strings.Contains(got[0], "named after mesh-one.be") {
+		t.Fatalf("got %v", got)
+	}
+}
+
+func TestABuildContextOnASeatNamesNoForge(t *testing.T) {
+	m := Manifest{Module: "packager", Build: &Build{Artifacts: []Artifact{
+		{Name: "server", Kind: "image", From: "Dockerfile",
+			Context: &ArtifactContext{Seat: "git", Repository: "org/controller", Ref: "main"}},
+	}}}
+	if got := InstallationProblems(m); len(got) != 0 {
+		t.Fatalf("a context on a seat was reported: %v", got)
+	}
+	m.Build.Artifacts[0].Context = &ArtifactContext{Repository: "https://git.mesh-one.be/org/controller.git"}
+	if got := InstallationProblems(m); len(got) != 1 {
+		t.Fatalf("a context by URL was not reported: %v", got)
+	}
+}

internal/catalogue/manifest.go

@@ -91,8 +91,13 @@ const (
 // If the path is absent when a machine applies, the host refuses clearly rather than creating it:
 // the mesh does not own it, so conjuring it would be a lie the host then acts on.
 type Access struct {
-	// Path is the absolute path on the machine, as the operator provides it.
+	// ID is the name the module gives this access, which the assignment places
-	Path string `json:"path"`
+	// (`accesses: {<id>: <path>}`, novox/hq ADR 0112, issue 153) and the module's mounts name as
+	// ${access:<id>}. The shape a definition should use: it names no path of any machine.
+	ID string `json:"id,omitempty"`
+	// Path is the absolute path on the machine. A definition carrying one names an installation;
+	// tolerated as the default the assignment may replace, for accesses declared before ids.
+	Path string `json:"path,omitempty"`
 	// Mode is "read" or "read-write". Absent narrows to read.
 	Mode string `json:"mode,omitempty"`
 }
@@ -122,6 +127,38 @@ type Offer struct {
 	Name string `json:"name"`
 	// Scope defaults to the node, which is where most things must be to be usable.
 	Scope string `json:"scope,omitempty"`
+	// Credential, when set, says this provision's credential is one of the provider's own secrets,
+	// shared by every consumer (novox/hq ADR 0158): software that holds one password or one key
+	// cannot give each consumer a login of its own. The named secret must say how it is taken.
+	Credential *OfferCredential `json:"credential,omitempty"`
+}
+
+// OfferCredential names which of the provider's own secrets a provision's consumers receive.
+type OfferCredential struct {
+	Own string `json:"own"`
+}
+
+// SharedCredentialOf is the own secret an offer of this module names as the provision's credential,
+// and whether it names one.
+func (m Manifest) SharedCredentialOf(provision string) (string, bool) {
+	for _, o := range m.Provides {
+		if o.Name == provision && o.Credential != nil && o.Credential.Own != "" {
+			return o.Credential.Own, true
+		}
+	}
+	return "", false
+}
+
+// ProvisionsSharing is every provision of this module whose credential is the named own secret.
+func (m Manifest) ProvisionsSharing(own string) []string {
+	var out []string
+	for _, o := range m.Provides {
+		if o.Credential != nil && o.Credential.Own == own {
+			out = append(out, o.Name)
+		}
+	}
+	sort.Strings(out)
+	return out
 }
 
 // At is this offer's scope, with the default applied.
@@ -142,24 +179,28 @@ func (o *Offer) UnmarshalJSON(raw []byte) error {
 	var full struct {
 		Name       string           `json:"name"`
 		Scope      string           `json:"scope,omitempty"`
+		Credential *OfferCredential `json:"credential,omitempty"`
 	}
-	if err := json.Unmarshal(raw, &full); err != nil {
+	dec := json.NewDecoder(bytes.NewReader(raw))
-		return fmt.Errorf("a provided name is either a string or {name, scope}: %w", err)
+	dec.DisallowUnknownFields()
+	if err := dec.Decode(&full); err != nil {
+		return fmt.Errorf("a provided name is either a string or {name, scope, credential}: %w", err)
 	}
-	o.Name, o.Scope = full.Name, full.Scope
+	o.Name, o.Scope, o.Credential = full.Name, full.Scope, full.Credential
 	return nil
 }
 
 // MarshalJSON writes back the short form when there is nothing else to say, so a manifest that
 // went through the mesh comes out looking like the one that went in.
 func (o Offer) MarshalJSON() ([]byte, error) {
-	if o.Scope == "" {
+	if o.Scope == "" && o.Credential == nil {
 		return json.Marshal(o.Name)
 	}
 	return json.Marshal(struct {
 		Name       string           `json:"name"`
-		Scope string `json:"scope"`
+		Scope      string           `json:"scope,omitempty"`
-	}{o.Name, o.Scope})
+		Credential *OfferCredential `json:"credential,omitempty"`
+	}{o.Name, o.Scope, o.Credential})
 }
 
 // Manifest is everything a module says about itself.
@@ -252,8 +293,8 @@ type Manifest struct {
 	// module claiming a seat answers what that seat's protocol promises (novox/hq ADR 0118).
 	Tools []string `json:"tools,omitempty"`
 
-	// Invokes are the tools this module calls, each `<module>.<tool>`, or the single entry `*` for
+	// Invokes are the tools this module calls, each `<module>.<tool>` or a role's `seat:<seat>.<verb>`,
-	// every tool on the mesh (novox/hq ADR 0152).
+	// or the single entry `*` for every tool on the mesh (novox/hq ADR 0152, ADR 0154).
 	//
 	// **A grant, and only a grant.** The bus lets this module publish exactly those tool subjects
 	// and nothing beside them — no event, no subscription, no seat. A module that declares none
@@ -385,7 +426,16 @@ type Manifest struct {
 	// module running on three machines has three passwords and the mesh can read none of them. A
 	// manifest carrying one instead would put the same secret on every machine that ever runs the
 	// module, in a file anybody can read, for ever.
-	OwnSecrets map[string]string `json:"own-secrets,omitempty"`
+	//
+	// **And how the module takes it** (novox/hq ADR 0114, issue 180): `"admin": "<path>"` says
+	// where and nothing else; `"admin": {"path": "<path>", "taken": "at-start"}` says the module
+	// reads the file when it starts, so the mesh may rotate it by making a new value and starting
+	// the module again; `"taken": "applied"` says the module's own code applies it to a backend
+	// that takes it only once, so a rotation must be staged beside the current value — the form the
+	// mesh does not build yet, and refuses by name. A secret that says neither is not rotated by
+	// the mesh: the one fault worse than an unrotated credential is a rotated one the software
+	// never saw.
+	OwnSecrets OwnSecrets `json:"own-secrets,omitempty"`
 
 	// SecretsOwner is who the files holding this module's secrets belong to on the machine —
 	// `uid:gid`, or a name — when its process is not root.
@@ -549,8 +599,14 @@ type BuildsOn struct {
 type ArtifactContext struct {
 	// Repository is cloned fresh, the same way the module's own repository is — a working tree
 	// nothing has touched, so what was built is reproducible from the two commits named rather
-	// than from whatever a previous build happened to leave behind.
+	// than from whatever a previous build happened to leave behind. A URL, or — with Seat — a
+	// path on that seat's holder, `<owner>/<name>`.
 	Repository string `json:"repository"`
+	// Seat is the seat the repository lives on: `git` for this mesh's own forge (novox/hq ADR 0111,
+	// ADR 0155). A context written as a URL names one installation's forge and can be built
+	// nowhere else; a path on the seat is composed by the mesh that builds it, whichever forge
+	// holds the seat there.
+	Seat string `json:"seat,omitempty"`
 	// Ref is the branch, tag or commit of that repository to build. Empty means its own default
 	// branch — the same meaning an empty module ref already has.
 	Ref string `json:"ref,omitempty"`
@@ -1122,6 +1178,23 @@ func ParseManifest(raw []byte) (Manifest, error) {
 		if !name.MatchString(p) {
 			problems = append(problems, fmt.Sprintf("%q is not a usable name to provide", p))
 		}
+		if offer.Credential != nil {
+			own, declared := m.OwnSecrets[offer.Credential.Own]
+			switch {
+			case offer.Credential.Own == "":
+				problems = append(problems, fmt.Sprintf(
+					"%s provides %q with a credential that names no own secret", m.Module, p))
+			case !declared:
+				problems = append(problems, fmt.Sprintf(
+					"%s provides %q with its own secret %q as the credential, and declares no such secret",
+					m.Module, p, offer.Credential.Own))
+			case own.Taken == "":
+				problems = append(problems, fmt.Sprintf(
+					"%s provides %q with its own secret %q as the credential every consumer receives, so "+
+						"the secret must say how the module takes it: \"taken\": \"at-start\" or \"applied\" (ADR 0158)",
+					m.Module, p, offer.Credential.Own))
+			}
+		}
 		if instead, generic := engineGeneric[p]; generic {
 			// A consumer is written against an engine, not a role (novox/hq ADR 0027). Providing
 			// the role means a requirement for it matches any engine, resolves as satisfied, and
@@ -1408,14 +1481,20 @@ func ParseManifest(raw []byte) (Manifest, error) {
 			}
 		}
 	}
-	for name, where := range m.OwnSecrets {
+	for name, own := range m.OwnSecrets {
-		if !placedOrAbsolute(where) {
+		if !placedOrAbsolute(own.Path) {
 			problems = append(problems, fmt.Sprintf(
-				"%s needs %q at %q, which is neither an absolute path nor a placed one", m.Module, name, where))
+				"%s needs %q at %q, which is neither an absolute path nor a placed one", m.Module, name, own.Path))
 		}
 		if name == "" {
 			problems = append(problems, m.Module+" needs a secret with no name")
 		}
+		if own.Taken != "" && own.Taken != TakenAtStart && own.Taken != TakenApplied {
+			problems = append(problems, fmt.Sprintf(
+				"%s says its secret %q is taken %q; a secret is taken %q (read when the module starts) "+
+					"or %q (applied by the module's own code to a backend that takes it once)",
+				m.Module, name, own.Taken, TakenAtStart, TakenApplied))
+		}
 	}
 	localOf := map[string]string{}
 	for _, to := range m.SecretRequirements() {
@@ -1519,7 +1598,16 @@ func ParseManifest(raw []byte) (Manifest, error) {
 		}
 	}
 	for _, a := range m.Accesses {
-		if !strings.HasPrefix(a.Path, "/") {
+		if a.ID == "" && a.Path == "" {
+			problems = append(problems, fmt.Sprintf(
+				"%s declares an access with neither an id nor a path — an id, which the assignment places",
+				m.Module))
+		}
+		if a.ID != "" && !accessRef.MatchString("${access:"+a.ID+"}") {
+			problems = append(problems, fmt.Sprintf(
+				"%s accesses %q; an access id is lowercase letters, digits and dashes", m.Module, a.ID))
+		}
+		if a.Path != "" && !strings.HasPrefix(a.Path, "/") {
 			problems = append(problems, fmt.Sprintf(
 				"%s accesses %q, which is not an absolute path", m.Module, a.Path))
 		}
@@ -1551,6 +1639,7 @@ func ParseManifest(raw []byte) (Manifest, error) {
 	// the time it sees the mount it is being asked to create the directory, which it can do.
 	problems = append(problems, m.undeclaredMounts()...)
 	problems = append(problems, m.unknownDirRefs()...)
+	problems = append(problems, m.unknownAccessRefs()...)
 
 	for i, r := range m.Resources {
 		id, _ := r["id"].(string)
@@ -1669,8 +1758,8 @@ func (m Manifest) undeclaredMounts() []string {
 			claim(fmt.Sprint(r["path"]))
 		}
 	}
-	for _, where := range m.OwnSecrets {
+	for _, own := range m.OwnSecrets {
-		claim(where)
+		claim(own.Path)
 	}
 	for _, to := range m.SecretRequirements() {
 		for _, f := range m.SecretFiles(to) {
@@ -1795,6 +1884,7 @@ func invokeProblems(m Manifest) []string {
 		if t == "*" {
 			continue
 		}
+		t = strings.TrimPrefix(t, "seat:")
 		module, tool, named := strings.Cut(t, ".")
 		if !named || !name.MatchString(module) || !toolName.MatchString(tool) {
 			problems = append(problems, fmt.Sprintf(
@@ -1804,3 +1894,69 @@ func invokeProblems(m Manifest) []string {
 	}
 	return problems
 }
+
+// How a module takes one of its own secrets (ADR 0114): read from the file when it starts, or
+// applied by its own code to a backend that takes it once.
+const (
+	TakenAtStart = "at-start"
+	TakenApplied = "applied"
+)
+
+// OwnSecret is where one of a module's own secrets lands, and how the module takes it.
+type OwnSecret struct {
+	Path  string
+	Taken string
+}
+
+// OwnSecrets is a module's own secrets by name. On the wire each is a path, or an object naming
+// the path and how it is taken; written back the way it was read, so a manifest the mesh holds
+// keeps its bytes.
+type OwnSecrets map[string]OwnSecret
+
+func (o *OwnSecrets) UnmarshalJSON(raw []byte) error {
+	var entries map[string]json.RawMessage
+	if err := json.Unmarshal(raw, &entries); err != nil {
+		return err
+	}
+	out := make(OwnSecrets, len(entries))
+	for name, body := range entries {
+		var path string
+		if err := json.Unmarshal(body, &path); err == nil {
+			out[name] = OwnSecret{Path: path}
+			continue
+		}
+		var long struct {
+			Path  string `json:"path"`
+			Taken string `json:"taken,omitempty"`
+		}
+		dec := json.NewDecoder(bytes.NewReader(body))
+		dec.DisallowUnknownFields()
+		if err := dec.Decode(&long); err != nil {
+			return fmt.Errorf("own-secrets.%s: a path, or {\"path\", \"taken\"}: %w", name, err)
+		}
+		out[name] = OwnSecret{Path: long.Path, Taken: long.Taken}
+	}
+	*o = out
+	return nil
+}
+
+func (o OwnSecrets) MarshalJSON() ([]byte, error) {
+	entries := make(map[string]any, len(o))
+	for name, s := range o {
+		if s.Taken == "" {
+			entries[name] = s.Path
+			continue
+		}
+		entries[name] = map[string]string{"path": s.Path, "taken": s.Taken}
+	}
+	return json.Marshal(entries)
+}
+
+// Paths is each own secret's path by name — the shape every placement and file walk reads.
+func (o OwnSecrets) Paths() map[string]string {
+	out := make(map[string]string, len(o))
+	for name, s := range o {
+		out[name] = s.Path
+	}
+	return out
+}

internal/catalogue/names_served.go

@@ -0,0 +1,124 @@
+package catalogue
+
+import (
+	"sort"
+	"strings"
+)
+
+// Which machine serves each routed name (novox/hq ADR 0066, issue 178).
+//
+// A routed name is a label the mesh composed for a consumer's endpoint, and it is *served* by the
+// provider that answers requests for it — the proxy the consumer's route reaches. The same name is
+// composed into every labelled contribution the consumer makes, because a provider that must know
+// the consumer's public name (an identity provider composing a redirect) is told it the same way
+// (04-ISSUES/122). Attributing the name to whichever of those providers a map happened to yield
+// last sent a public name to the identity provider's machine on one plan and to the proxy's on the
+// next (forge issue 227), and the whole names region flipped with it.
+//
+// **The terminus serves the name.** Among the providers a name reaches, the one that serves it is
+// the one that is not itself routed: a provider that contributes a labelled name of its own to some
+// requirement is published through another provider, and is a consumer of names, not their end.
+// Name-agnostic — nothing here knows what "route" means — and structural: it reads the graph the
+// modules declared. Deterministic: names, requirements and nodes are walked in order, so two
+// plans of one mesh yield one region.
+
+// NamesServed is every routed name across the mesh and the node that serves it, from every node's
+// resolution and settings. A name several termini claim goes to the first node in name order, so
+// the answer is stable; a name nothing terminal claims is left out.
+func NamesServed(plans map[string]Resolution, settings map[string]SettingsBy) (map[string]string, error) {
+	nodes := make([]string, 0, len(plans))
+	for n := range plans {
+		nodes = append(nodes, n)
+	}
+	sort.Strings(nodes)
+
+	out := map[string]string{}
+	for _, node := range nodes {
+		plan := plans[node]
+		all, err := plan.contributions(settings[node], nil, nil)
+		if err != nil {
+			return nil, err
+		}
+		requirements := make([]string, 0, len(all))
+		for to := range all {
+			requirements = append(requirements, to)
+		}
+		sort.Strings(requirements)
+		for _, to := range requirements {
+			for _, given := range all[to] {
+				if given.Node != "" {
+					// Said from another machine; that machine's own resolution carries it.
+					continue
+				}
+				// A routed name, and only that: a contribution the mesh composed a name for from a
+				// label it was given. A grant that happens to carry a `name` of its own — a database
+				// name — carries no label and is left alone.
+				if _, labelled := given.Values["label"]; !labelled {
+					continue
+				}
+				name, _ := given.Values["name"].(string)
+				if name == "" {
+					continue
+				}
+				serving := servingNodeOf(plan, to, given.From, node)
+				if !servesNames(plans[serving], to) {
+					continue
+				}
+				name = strings.ToLower(name)
+				if held, taken := out[name]; !taken || serving < held {
+					out[name] = serving
+				}
+			}
+		}
+	}
+	return out, nil
+}
+
+// servingNodeOf is the node answering one consumer's requirement: whoever the plan needs it from,
+// or this same node when the provider is beside the consumer.
+func servingNodeOf(plan Resolution, requirement, consumer, self string) string {
+	for _, need := range plan.Needs {
+		if need.Name == requirement && need.For == consumer && need.From != "" {
+			return need.From
+		}
+	}
+	return self
+}
+
+// servesNames says whether the module providing a requirement on a node is a terminus: it is not
+// itself published under a labelled name through some other provider. A node whose plan is not
+// known (it did not resolve) serves nothing.
+func servesNames(plan Resolution, requirement string) bool {
+	for _, m := range plan.Modules {
+		if !offers(m, requirement) {
+			continue
+		}
+		return !contributesALabel(m)
+	}
+	return false
+}
+
+func offers(m Manifest, requirement string) bool {
+	for _, o := range m.Offers() {
+		if o == requirement {
+			return true
+		}
+	}
+	return false
+}
+
+func contributesALabel(m Manifest) bool {
+	for _, values := range m.Contributes {
+		if _, labelled := values["label"]; labelled {
+			return true
+		}
+	}
+	for _, locals := range m.ContributesMany {
+		for _, values := range locals {
+			if _, labelled := values["label"]; labelled {
+				return true
+			}
+		}
+	}
+	return false
+}

internal/catalogue/names_served_test.go

@@ -0,0 +1,99 @@
+package catalogue
+
+import (
+	"testing"
+)
+
+// The mesh of forge issue 227 (novox/hq issue 178): a dashboard on the home server contributes its
+// label to the route its proxy serves AND to the identity provider on the control node, which must
+// know the dashboard's public name to compose a redirect. Both contributions carry the composed
+// name; only the proxy serves it.
+func twoNodesOneName(t *testing.T) (map[string]Resolution, map[string]SettingsBy) {
+	t.Helper()
+	catalogue := shelf(
+		Manifest{Module: "route-adapter", Version: "1", Provides: Offers("route"),
+			Serves: map[string]map[string]any{"route": {}}, Receives: map[string]string{"route": "/etc/adapter/mesh.json"}},
+		Manifest{Module: "route-proxy", Version: "1", Provides: Offers("route"),
+			Serves: map[string]map[string]any{"route": {}}, Receives: map[string]string{"route": "/etc/proxy/mesh.json"}},
+		Manifest{Module: "keycloak", Version: "1", Provides: FromAnywhere("oidc-client"),
+			Serves:   map[string]map[string]any{"oidc-client": {"token-path": "/token"}},
+			Receives: map[string]string{"oidc-client": "/etc/keycloak/clients.json"},
+			Listens:  []Listening{{Port: 8080, From: FromMesh, Why: "the login page"}},
+			// Published through the proxy itself: the identity provider is routed, not a router.
+			Contributes: map[string]map[string]any{"route": {"label": "login", "endpoint": "web", "port": 8080}}},
+		Manifest{Module: "grafana", Version: "1",
+			Listens: []Listening{{Port: 3000, From: FromMesh, Why: "dashboards"}},
+			Contributes: map[string]map[string]any{
+				"route":       {"label": "grafana", "endpoint": "web", "port": 3000},
+				"oidc-client": {"label": "grafana", "endpoint": "web", "port": 3000, "callback": "/login"},
+			}},
+	)
+	home := withDomain("home.example")
+	home.Name, home.At = "home-server", "home-server.internal"
+	control := withDomain("control.example")
+	control.Name, control.At = "anchor", "anchor.internal"
+
+	onHome, err := Resolve(catalogue, []string{"grafana", "route-adapter"}, home, World{
+		Offered: map[string][]Provider{"oidc-client": {{Node: "anchor", At: "anchor.internal", Module: "keycloak"}}},
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+	onControl, err := Resolve(catalogue, []string{"keycloak", "route-proxy"}, control, World{})
+	if err != nil {
+		t.Fatal(err)
+	}
+	return map[string]Resolution{"home-server": onHome, "anchor": onControl},
+		map[string]SettingsBy{"home-server": {}, "anchor": {}}
+}
+
+func TestANameResolvesToTheNodeWhoseProxyServesIt(t *testing.T) {
+	plans, settings := twoNodesOneName(t)
+	// Many times, because the fault was map order: one plan said one node, the next the other.
+	for i := 0; i < 25; i++ {
+		served, err := NamesServed(plans, settings)
+		if err != nil {
+			t.Fatal(err)
+		}
+		if served["grafana.home.example"] != "home-server" {
+			t.Fatalf("run %d: the dashboard's name is served by %q, and its proxy is on the home server: %v",
+				i, served["grafana.home.example"], served)
+		}
+		if served["login.control.example"] != "anchor" {
+			t.Fatalf("run %d: the identity provider's own name is served by its proxy on the control node: %v", i, served)
+		}
+		if _, leaked := served["grafana.control.example"]; leaked {
+			t.Fatalf("a name composed for the identity provider's benefit is not one it serves: %v", served)
+		}
+	}
+}
+
+// A module that is routed several times names each route (ADR 0094's sibling for contributes);
+// every one of them is a name the mesh must resolve, and none reached the names region before.
+func TestEveryRouteOfAModuleWithSeveralIsANameServed(t *testing.T) {
+	catalogue := shelf(
+		Manifest{Module: "route-proxy", Version: "1", Provides: Offers("route"),
+			Serves: map[string]map[string]any{"route": {}}, Receives: map[string]string{"route": "/etc/proxy/mesh.json"}},
+		Manifest{Module: "photos", Version: "1",
+			Listens: []Listening{{Port: 8102, From: FromMesh, Why: "web"}, {Port: 9102, From: FromMesh, Why: "api"}},
+			ContributesMany: map[string]map[string]map[string]any{"route": {
+				"site": {"label": "photos", "endpoint": "web", "port": 8102},
+				"api":  {"label": "photos-api", "endpoint": "api", "port": 9102},
+			}}},
+	)
+	node := withDomain("control.example")
+	node.Name, node.At = "anchor", "anchor.internal"
+	plan, err := Resolve(catalogue, []string{"photos", "route-proxy"}, node, World{})
+	if err != nil {
+		t.Fatal(err)
+	}
+	served, err := NamesServed(map[string]Resolution{"anchor": plan}, map[string]SettingsBy{"anchor": {}})
+	if err != nil {
+		t.Fatal(err)
+	}
+	for _, name := range []string{"photos.control.example", "photos-api.control.example"} {
+		if served[name] != "anchor" {
+			t.Fatalf("%s is not served by its proxy: %v", name, served)
+		}
+	}
+}

internal/catalogue/needs_test.go

@@ -14,7 +14,7 @@ import (
 func needy() Manifest {
 	return Manifest{
 		Module: "postgres", Version: "1",
-		OwnSecrets: map[string]string{"superuser": "/var/lib/mesh/postgres/superuser"},
+		OwnSecrets: OwnSecrets{"superuser": {Path: "/var/lib/mesh/postgres/superuser"}},
 		Resources: []map[string]any{
 			{"id": "store", "type": "container", "name": "mesh-postgres", "image": "postgres@sha256:x"},
 		},
@@ -74,7 +74,7 @@ func TestANeedIsAnAbsolutePath(t *testing.T) {
 func TestAModuleMayNeedSeveralThings(t *testing.T) {
 	// A password and a token, say. Telling them apart is the module's business, not the mesh's.
 	m := needy()
-	m.OwnSecrets["replication"] = "/var/lib/mesh/postgres/replication"
+	m.OwnSecrets["replication"] = OwnSecret{Path: "/var/lib/mesh/postgres/replication"}
 	got, _ := Resolve(shelf(m), []string{"postgres"}, reachable(), World{})
 	out, err := got.Declaration(Rendering{Needed: map[string]map[string]string{
 		"postgres": {"superuser": "b25l", "replication": "dHdv"},

internal/catalogue/own_secret_taken_test.go

@@ -0,0 +1,54 @@
+package catalogue
+
+import (
+	"encoding/json"
+	"strings"
+	"testing"
+)
+
+// An own secret says how the module takes it (novox/hq ADR 0114, issue 180): a path alone says
+// nothing of it, an object says `at-start` or `applied`, and the bytes the mesh holds are the bytes
+// it was given either way.
+func TestAnOwnSecretSaysHowItIsTaken(t *testing.T) {
+	m, err := ParseManifest([]byte(`{"module":"idp","version":"1","own-secrets":{
+		"broker":"/var/lib/mesh/idp/broker",
+		"admin":{"path":"/var/lib/idp/admin.secret","taken":"applied"},
+		"session":{"path":"/var/lib/idp/session.secret","taken":"at-start"}}}`))
+	if err != nil {
+		t.Fatal(err)
+	}
+	if m.OwnSecrets["broker"] != (OwnSecret{Path: "/var/lib/mesh/idp/broker"}) {
+		t.Fatalf("a path alone is a path and nothing more: %+v", m.OwnSecrets["broker"])
+	}
+	if m.OwnSecrets["admin"].Taken != TakenApplied || m.OwnSecrets["session"].Taken != TakenAtStart {
+		t.Fatalf("the word was not kept: %+v", m.OwnSecrets)
+	}
+	// Written back the way it was read, so a registered manifest keeps its bytes.
+	out, err := json.Marshal(m.OwnSecrets)
+	if err != nil {
+		t.Fatal(err)
+	}
+	var again OwnSecrets
+	if err := json.Unmarshal(out, &again); err != nil {
+		t.Fatal(err)
+	}
+	if len(again) != 3 || again["admin"].Taken != TakenApplied || again["broker"].Taken != "" {
+		t.Fatalf("the round trip changed the secrets: %s", out)
+	}
+	if !strings.Contains(string(out), `"broker":"/var/lib/mesh/idp/broker"`) {
+		t.Fatalf("a path alone is written back as a path: %s", out)
+	}
+}
+
+func TestAnOwnSecretTakenSomeOtherWayIsRefused(t *testing.T) {
+	_, err := ParseManifest([]byte(`{"module":"idp","version":"1","own-secrets":{
+		"admin":{"path":"/var/lib/idp/admin.secret","taken":"sometimes"}}}`))
+	if err == nil || !strings.Contains(err.Error(), `taken "sometimes"`) {
+		t.Fatalf("an unknown word for how a secret is taken was accepted: %v", err)
+	}
+	_, err = ParseManifest([]byte(`{"module":"idp","version":"1","own-secrets":{
+		"admin":{"path":"/var/lib/idp/admin.secret","rotate":"yes"}}}`))
+	if err == nil {
+		t.Fatal("an unknown field on an own secret was accepted")
+	}
+}

internal/catalogue/placed_paths_test.go

@@ -0,0 +1,180 @@
+package catalogue
+
+import (
+	"encoding/json"
+	"os"
+	"path/filepath"
+	"reflect"
+	"strings"
+	"testing"
+)
+
+// TestPlacedDirectoriesKeepTheirPaths is the check novox/hq issue 119 asks for before a definition
+// stops naming where its data lives: a converted manifest, resolved on a node with the default root,
+// names exactly the paths the manifest before it named. Data that a service is using must not move
+// because a definition stopped saying where it was.
+//
+// Two checkouts: MESH_CATALOGUE_BEFORE, the catalogue as it was, and MESH_CATALOGUE, as it is now.
+// Every module in both is resolved with the controller's own rule (dirsFor, dirFill) and compared
+// whole — not only the directories, but every string a directory's id was written into. Both
+// sides are resolved, so a manifest converted in two steps (issue 119, then issue 174) is judged
+// against the paths it named, not the text it used to name them with.
+func TestPlacedDirectoriesKeepTheirPaths(t *testing.T) {
+	before, after := os.Getenv("MESH_CATALOGUE_BEFORE"), os.Getenv("MESH_CATALOGUE")
+	if before == "" || after == "" {
+		t.Skip("set MESH_CATALOGUE_BEFORE and MESH_CATALOGUE to two catalogue checkouts to run this")
+	}
+	found, _ := filepath.Glob(filepath.Join(after, "modules", "*", "module.json"))
+	compared := 0
+	for _, path := range found {
+		module := filepath.Base(filepath.Dir(path))
+		old, err := os.ReadFile(filepath.Join(before, "modules", module, "module.json"))
+		if err != nil {
+			continue // new since; nothing to keep
+		}
+		now, err := os.ReadFile(path)
+		if err != nil {
+			t.Fatal(err)
+		}
+		if string(old) == string(now) {
+			continue
+		}
+		m, err := ParseManifest(now)
+		if err != nil {
+			t.Errorf("%s: %v", module, err)
+			continue
+		}
+		earlier, err := ParseManifest(old)
+		if err != nil {
+			t.Errorf("%s before: %v", module, err)
+			continue
+		}
+		var was, is any
+		if err := json.Unmarshal(old, &was); err != nil {
+			t.Fatal(err)
+		}
+		if err := json.Unmarshal(now, &is); err != nil {
+			t.Fatal(err)
+		}
+		// Both sides resolved: the manifest before may itself already place some directories
+		// (issue 119's conversion), and what must not move is the path a machine sees.
+		was = resolvedTree(was, dirsFor(earlier, Rendering{}), module, t)
+		resolved := resolvedTree(is, dirsFor(m, Rendering{}), module, t)
+		// An access named by id resolves to the path the definition still carries as its default
+		// (issue 153) — the same rule as a placed directory: an assignment that says nothing moves
+		// nothing.
+		was = accessesResolved(was, earlier)
+		resolved = accessesResolved(resolved, m)
+		if !reflect.DeepEqual(was, resolved) {
+			wasJSON, _ := json.MarshalIndent(was, "", "  ")
+			isJSON, _ := json.MarshalIndent(resolved, "", "  ")
+			t.Errorf("%s: resolved on the default root, the converted manifest is not the one before it\n--- before\n%s\n--- resolved now\n%s",
+				module, firstDifference(string(wasJSON), string(isJSON)), "")
+		}
+		compared++
+	}
+	t.Logf("%d converted manifest(s) resolve to the paths they named before", compared)
+}
+
+// resolvedTree is the manifest as a machine would see it: every ${dir:…} filled, a pathless
+// directory given the path it resolves to, and the placement word removed.
+func resolvedTree(node any, dirs map[string]string, module string, t *testing.T) any {
+	switch v := node.(type) {
+	case map[string]any:
+		out := map[string]any{}
+		for k, child := range v {
+			if k == "place" {
+				continue
+			}
+			out[k] = resolvedTree(child, dirs, module, t)
+		}
+		if out["type"] == "directory" {
+			if _, has := out["path"]; !has {
+				if id, ok := out["id"].(string); ok {
+					out["path"] = dirs[id]
+				}
+			}
+		}
+		return out
+	case []any:
+		out := make([]any, len(v))
+		for i, child := range v {
+			out[i] = resolvedTree(child, dirs, module, t)
+		}
+		return out
+	case string:
+		filled, err := dirFill(v, dirs, module)
+		if err != nil {
+			t.Error(err)
+		}
+		return filled
+	}
+	return node
+}
+
+func firstDifference(a, b string) string {
+	al, bl := strings.Split(a, "\n"), strings.Split(b, "\n")
+	for i := range al {
+		if i >= len(bl) || al[i] != bl[i] {
+			from := i - 2
+			if from < 0 {
+				from = 0
+			}
+			to := i + 3
+			if to > len(al) {
+				to = len(al)
+			}
+			bt := i + 3
+			if bt > len(bl) {
+				bt = len(bl)
+			}
+			return "before:\n" + strings.Join(al[from:to], "\n") + "\nnow:\n" + strings.Join(bl[from:bt], "\n")
+		}
+	}
+	return "(the difference is beyond the shorter document)"
+}
+
+// accessesResolved fills every ${access:<id>} with the default path the definition carries for that
+// access, and drops the id, so a manifest that names its accesses is compared by the paths a machine
+// with no placement receives.
+func accessesResolved(node any, m Manifest) any {
+	defaults := map[string]string{}
+	for _, a := range m.Accesses {
+		if a.ID != "" && a.Path != "" {
+			defaults[a.ID] = a.Path
+		}
+	}
+	var walk func(any) any
+	walk = func(n any) any {
+		switch v := n.(type) {
+		case map[string]any:
+			out := map[string]any{}
+			for k, child := range v {
+				if k == "id" {
+					if _, isAccess := v["mode"]; isAccess && v["type"] == nil {
+						if _, hasPath := v["path"]; hasPath {
+							continue
+						}
+					}
+				}
+				out[k] = walk(child)
+			}
+			return out
+		case []any:
+			out := make([]any, len(v))
+			for i, child := range v {
+				out[i] = walk(child)
+			}
+			return out
+		case string:
+			return accessRef.ReplaceAllStringFunc(v, func(ref string) string {
+				if p, ok := defaults[accessRef.FindStringSubmatch(ref)[1]]; ok {
+					return p
+				}
+				return ref
+			})
+		}
+		return n
+	}
+	return walk(node)
+}

internal/catalogue/placement.go

@@ -0,0 +1,382 @@
+package catalogue
+
+import (
+	"fmt"
+	"regexp"
+	"sort"
+	"strings"
+)
+
+// Where a module's data is on THIS machine is the assignment's (novox/hq ADR 0112, issue 153).
+//
+// A definition names no host path. It declares the directories it owns by id, and the operator's
+// shared data it needs by id too (an `access`, ADR 0051). A node has a default layout for the
+// former — <root>/<module>/<id> — and nothing at all for the latter, because shared data is
+// wherever the operator keeps it. An adopted machine keeps its data where the predecessor put it:
+// a 40 TB library on its own pool, a configuration on a second disk. Both halves are said on the
+// assignment, validated the way `endpoints` is — an id the module does not declare is refused,
+// because a setting that reaches nothing is a mistake — and resolved here, so the host receives
+// concrete paths exactly as it always has and learns no field.
+//
+//	{"places":   {"config": "/services/sonarr/config",
+//	              "data":   {"path": "/mnt/plex/data", "owner": "1000:1000"}},
+//	 "accesses": {"series": "/storage/media/series",
+//	              "downloads": "/storage/downloads"}}
+//
+// A placed directory is still the mesh's: created, chowned to the owner the assignment says (or
+// the manifest's), removed when empty and no longer declared. A placed access is still the
+// operator's: mounted, never created, chowned or removed.
+
+// PlacesSetting is the settings key that places a module's declared directories, by id.
+const PlacesSetting = "places"
+
+// AccessesSetting is the settings key that says where a module's accesses are on this node, by id.
+const AccessesSetting = "accesses"
+
+// Placement is what an assignment says about one of a module's directories.
+type Placement struct {
+	// Path is where the directory is on this machine. Absolute.
+	Path string
+	// Owner is "uid:gid" when the assignment overrides the manifest's — the predecessor's data is
+	// owned by whoever it ran as, and that is one machine's fact.
+	Owner string
+}
+
+var ownerShape = regexp.MustCompile(`^[0-9]+:[0-9]+$`)
+
+// accessRef is how a module names one of its accesses: ${access:<id>}.
+var accessRef = regexp.MustCompile(`\$\{access:([a-z0-9][a-z0-9-]*)\}`)
+
+// Places reads where this node places the module's directories, by directory id.
+//
+// It refuses an id the module declares no directory for, a path that is not absolute, and an
+// owner that is not uid:gid. A directory the assignment does not mention keeps the manifest's
+// stated path or the node's default layout.
+func Places(m Manifest, layers []Layer) (map[string]Placement, error) {
+	declared := map[string]bool{}
+	for _, r := range m.Resources {
+		if fmt.Sprint(r["type"]) == "directory" {
+			declared[fmt.Sprint(r["id"])] = true
+		}
+	}
+	out := map[string]Placement{}
+	for _, layer := range layers {
+		raw, ok := layer.Values[PlacesSetting]
+		if !ok {
+			continue
+		}
+		blocks, ok := raw.(map[string]any)
+		if !ok {
+			return nil, fmt.Errorf("%s: %s is a { directory: path | { path, owner } } map, and %q set it to something else",
+				m.Module, PlacesSetting, layer.From)
+		}
+		for id, body := range blocks {
+			if !declared[id] {
+				return nil, fmt.Errorf(
+					"%s places the directory %q, which it does not declare — the setting reaches "+
+						"nothing. It declares %s", m.Module, id, orNothing(namesOfDirs(directoriesOf(m))))
+			}
+			p := out[id]
+			switch v := body.(type) {
+			case string:
+				p.Path = strings.TrimSpace(v)
+			case map[string]any:
+				if path, said := v["path"]; said {
+					text, _ := path.(string)
+					p.Path = strings.TrimSpace(text)
+				}
+				if owner, said := v["owner"]; said {
+					text, _ := owner.(string)
+					if !ownerShape.MatchString(strings.TrimSpace(text)) {
+						return nil, fmt.Errorf("%s places %q with owner %v; an owner is uid:gid, numeric",
+							m.Module, id, owner)
+					}
+					p.Owner = strings.TrimSpace(text)
+				}
+			default:
+				return nil, fmt.Errorf("%s places %q with %v; a placement is a path, or { path, owner }",
+					m.Module, id, body)
+			}
+			if p.Path == "" {
+				return nil, fmt.Errorf("%s places %q without a path", m.Module, id)
+			}
+			if !strings.HasPrefix(p.Path, "/") {
+				return nil, fmt.Errorf("%s places %q at %q, which is not an absolute path", m.Module, id, p.Path)
+			}
+			p.Path = strings.TrimRight(p.Path, "/")
+			out[id] = p
+		}
+	}
+	if len(out) == 0 {
+		return nil, nil
+	}
+	return out, nil
+}
+
+// AccessPlaces reads where this node keeps the operator's data the module accesses, by access id.
+//
+// It refuses an id the module declares no access under, and a path that is not absolute. An
+// access declared by path alone cannot be placed — it has no name to place it by.
+func AccessPlaces(m Manifest, layers []Layer) (map[string]string, error) {
+	declared := map[string]bool{}
+	for _, a := range m.Accesses {
+		if a.ID != "" {
+			declared[a.ID] = true
+		}
+	}
+	out := map[string]string{}
+	for _, layer := range layers {
+		raw, ok := layer.Values[AccessesSetting]
+		if !ok {
+			continue
+		}
+		blocks, ok := raw.(map[string]any)
+		if !ok {
+			return nil, fmt.Errorf("%s: %s is a { access: path } map, and %q set it to something else",
+				m.Module, AccessesSetting, layer.From)
+		}
+		for id, body := range blocks {
+			if !declared[id] {
+				return nil, fmt.Errorf(
+					"%s places the access %q, which it does not declare — the setting reaches "+
+						"nothing. It declares %s", m.Module, id, orNothing(namesOfAccesses(m)))
+			}
+			path, _ := body.(string)
+			path = strings.TrimSpace(path)
+			if !strings.HasPrefix(path, "/") {
+				return nil, fmt.Errorf("%s places the access %q at %v, which is not an absolute path",
+					m.Module, id, body)
+			}
+			out[id] = strings.TrimRight(path, "/")
+		}
+	}
+	if len(out) == 0 {
+		return nil, nil
+	}
+	return out, nil
+}
+
+// placedAccess is one access with the path it resolves to on this node.
+type placedAccess struct {
+	ID   string
+	Path string
+	Mode string
+}
+
+// accessesFor is every access of a module with its path on this node: the assignment's where it
+// placed one, the definition's where it carries a default, and refused where neither says — an
+// access that resolves to nowhere would reach the machine as a mount of nothing.
+func accessesFor(m Manifest, layers []Layer) ([]placedAccess, map[string]string, error) {
+	placed, err := AccessPlaces(m, layers)
+	if err != nil {
+		return nil, nil, err
+	}
+	var out []placedAccess
+	byID := map[string]string{}
+	for _, a := range m.Accesses {
+		path := a.Path
+		if a.ID != "" {
+			if at, said := placed[a.ID]; said {
+				path = at
+			}
+		}
+		if path == "" {
+			return nil, nil, fmt.Errorf(
+				"%s accesses %q, and nothing says where that is on this node — the definition "+
+					"carries no path (it must not, novox/hq ADR 0112) and the assignment places "+
+					"none. Set %s: {%q: \"/where/it/is\"}",
+				m.Module, a.ID, AccessesSetting, a.ID)
+		}
+		out = append(out, placedAccess{ID: a.ID, Path: path, Mode: a.At()})
+		if a.ID != "" {
+			byID[a.ID] = path
+		}
+	}
+	return out, byID, nil
+}
+
+// accessFill resolves every ${access:…} in one string, or refuses a reference naming no access.
+func accessFill(s string, accesses map[string]string, module string) (string, error) {
+	var missing error
+	out := accessRef.ReplaceAllStringFunc(s, func(ref string) string {
+		id := accessRef.FindStringSubmatch(ref)[1]
+		path, has := accesses[id]
+		if !has {
+			missing = fmt.Errorf(
+				"%s says ${access:%s}, and %s declares no access %q. It declares %s",
+				module, id, module, id, orNothing(namesOfAccessIDs(accesses)))
+			return ref
+		}
+		return path
+	})
+	return out, missing
+}
+
+// accessInto fills every ${access:…} a resource carries — in its path, its content, its mounts,
+// its environment and its env-files — with the path this node resolved for it. The same walk as
+// dirInto, for the same reason: a literal `${access:x}` reaching the machine would be mounted as
+// a directory called that.
+func accessInto(resource map[string]any, accesses map[string]string, module string) error {
+	if !mentionsAccess(resource) {
+		return nil
+	}
+	fill := func(s string) (string, error) { return accessFill(s, accesses, module) }
+	var err error
+	if path, ok := resource["path"].(string); ok {
+		if resource["path"], err = fill(path); err != nil {
+			return err
+		}
+	}
+	if content, ok := resource["content"].(string); ok {
+		if resource["content"], err = fill(content); err != nil {
+			return err
+		}
+	}
+	for _, field := range []string{"volumes", "env-file"} {
+		list, ok := resource[field].([]any)
+		if !ok {
+			continue
+		}
+		filled := make([]any, len(list))
+		for i, v := range list {
+			filled[i] = v
+			if s, ok := v.(string); ok {
+				if filled[i], err = fill(s); err != nil {
+					return err
+				}
+			}
+		}
+		resource[field] = filled
+	}
+	if env, ok := resource["env"].(map[string]any); ok {
+		filled := make(map[string]any, len(env))
+		for key, v := range env {
+			filled[key] = v
+			if s, ok := v.(string); ok {
+				if filled[key], err = fill(s); err != nil {
+					return err
+				}
+			}
+		}
+		resource["env"] = filled
+	}
+	return nil
+}
+
+func mentionsAccess(resource map[string]any) bool {
+	for _, field := range []string{"path", "content"} {
+		if s, ok := resource[field].(string); ok && accessRef.MatchString(s) {
+			return true
+		}
+	}
+	for _, field := range []string{"volumes", "env-file"} {
+		if list, ok := resource[field].([]any); ok {
+			for _, v := range list {
+				if s, ok := v.(string); ok && accessRef.MatchString(s) {
+					return true
+				}
+			}
+		}
+	}
+	if env, ok := resource["env"].(map[string]any); ok {
+		for _, v := range env {
+			if s, ok := v.(string); ok && accessRef.MatchString(s) {
+				return true
+			}
+		}
+	}
+	return false
+}
+
+// ownerInto gives a placed directory the owner the assignment said, where it said one. The
+// manifest's owner is what the image expects on any machine; the assignment's is what this
+// machine's data already is.
+func ownerInto(resource map[string]any, placed map[string]Placement) {
+	if fmt.Sprint(resource["type"]) != "directory" {
+		return
+	}
+	if p, ok := placed[fmt.Sprint(resource["id"])]; ok && p.Owner != "" {
+		resource["owner"] = p.Owner
+	}
+}
+
+// unknownAccessRefs is every ${access:…} in the definition that names no access the definition
+// declares by id — refused where the author is, as unknownDirRefs does for directories.
+func (m Manifest) unknownAccessRefs() []string {
+	declared := map[string]bool{}
+	for _, a := range m.Accesses {
+		if a.ID != "" {
+			declared[a.ID] = true
+		}
+	}
+	seen := map[string]bool{}
+	var problems []string
+	refuse := func(s string, where any) {
+		for _, match := range accessRef.FindAllStringSubmatch(s, -1) {
+			id := match[1]
+			if declared[id] || seen[id] {
+				continue
+			}
+			seen[id] = true
+			problems = append(problems, fmt.Sprintf(
+				"%s says ${access:%s} in %v, and declares no access %q — a reference the mesh "+
+					"cannot place would reach the machine as a literal path",
+				m.Module, id, where, id))
+		}
+	}
+	for _, r := range m.Resources {
+		for _, field := range []string{"path", "content"} {
+			if s, ok := r[field].(string); ok {
+				refuse(s, r["id"])
+			}
+		}
+		for _, field := range []string{"volumes", "env-file"} {
+			if list, ok := r[field].([]any); ok {
+				for _, v := range list {
+					if s, ok := v.(string); ok {
+						refuse(s, r["id"])
+					}
+				}
+			}
+		}
+		if env, ok := r["env"].(map[string]any); ok {
+			for _, v := range env {
+				if s, ok := v.(string); ok {
+					refuse(s, r["id"])
+				}
+			}
+		}
+	}
+	sort.Strings(problems)
+	return problems
+}
+
+func directoriesOf(m Manifest) map[string]string {
+	dirs := map[string]string{}
+	for _, r := range m.Resources {
+		if fmt.Sprint(r["type"]) == "directory" {
+			dirs[fmt.Sprint(r["id"])] = ""
+		}
+	}
+	return dirs
+}
+
+func namesOfAccesses(m Manifest) []string {
+	var names []string
+	for _, a := range m.Accesses {
+		if a.ID != "" {
+			names = append(names, fmt.Sprintf("%q", a.ID))
+		}
+	}
+	sort.Strings(names)
+	return names
+}
+
+func namesOfAccessIDs(accesses map[string]string) []string {
+	var names []string
+	for id := range accesses {
+		names = append(names, fmt.Sprintf("%q", id))
+	}
+	sort.Strings(names)
+	return names
+}

internal/catalogue/placement_test.go

@@ -0,0 +1,172 @@
+package catalogue
+
+import (
+	"strings"
+	"testing"
+)
+
+// The case novox/hq issue 153 records: an adopted machine keeps its data where the predecessor put
+// it — a library on its own pool that must never move, a configuration on a second disk owned by
+// whoever the predecessor ran as. A definition may name none of that (ADR 0112); the assignment
+// says it, by the ids the definition declared, and the machine receives concrete paths as always.
+func placeable() Manifest {
+	m := mod("arr", nil, nil, nil)
+	m.Resources = []map[string]any{
+		{"id": "state", "type": "directory", "place": ".", "mode": "0700"},
+		{"id": "config", "type": "directory", "mode": "0755", "owner": "1000:1000"},
+		{"id": "server", "type": "container", "name": "arr", "image": "arr:1",
+			"volumes": []any{"${dir:config}:/config", "${access:series}:/series", "${access:spool}:/downloads:ro"},
+			"env":     map[string]any{"SPOOL": "${access:spool}"}},
+	}
+	m.Accesses = []Access{{ID: "series", Mode: AccessReadWrite}, {ID: "spool"}}
+	return m
+}
+
+func placedBy(values map[string]any) Rendering {
+	return Rendering{Settings: SettingsBy{"arr": {{From: "node anchor", Values: values}}}}
+}
+
+func TestAnAssignmentPlacesDirectoriesAndAccesses(t *testing.T) {
+	got, err := Resolve(shelf(placeable()), []string{"arr"}, workstation(), World{})
+	if err != nil {
+		t.Fatal(err)
+	}
+	out, err := got.Declaration(placedBy(map[string]any{
+		PlacesSetting: map[string]any{
+			"config": map[string]any{"path": "/services/arr/config/", "owner": "1001:2000"},
+		},
+		AccessesSetting: map[string]any{
+			"series": "/storage/media/series",
+			"spool":  "/storage/downloads",
+		},
+	}))
+	if err != nil {
+		t.Fatal(err)
+	}
+	seen := map[string]map[string]any{}
+	for _, r := range out {
+		seen[r["id"].(string)] = r
+	}
+	config := seen["arr.config"]
+	if config["path"] != "/services/arr/config" || config["owner"] != "1001:2000" {
+		t.Fatalf("the placed directory is %v %v; want the assignment's path and owner", config["path"], config["owner"])
+	}
+	if seen["arr.state"]["path"] != "/var/lib/arr" {
+		t.Fatalf("an unplaced directory left the default layout: %v", seen["arr.state"]["path"])
+	}
+	var accesses []string
+	for _, r := range out {
+		if r["type"] == "access" {
+			accesses = append(accesses, r["path"].(string)+" "+r["mode"].(string))
+		}
+	}
+	if strings.Join(accesses, ",") != "/storage/media/series read-write,/storage/downloads read" {
+		t.Fatalf("the accesses reached the machine as %v", accesses)
+	}
+	server := seen["arr.server"]
+	mounts := server["volumes"].([]any)
+	if mounts[0] != "/services/arr/config:/config" || mounts[1] != "/storage/media/series:/series" ||
+		mounts[2] != "/storage/downloads:/downloads:ro" {
+		t.Fatalf("the mounts were not filled with the placed paths: %v", mounts)
+	}
+	if server["env"].(map[string]any)["SPOOL"] != "/storage/downloads" {
+		t.Fatalf("the environment was not filled: %v", server["env"])
+	}
+}
+
+// An access declared by id and placed by nobody resolves to nowhere, and that is refused with the
+// setting to write — not mounted as the literal, not skipped.
+func TestAnUnplacedAccessIsRefusedByName(t *testing.T) {
+	got, err := Resolve(shelf(placeable()), []string{"arr"}, workstation(), World{})
+	if err != nil {
+		t.Fatal(err)
+	}
+	_, err = got.Declaration(placedBy(map[string]any{
+		AccessesSetting: map[string]any{"series": "/storage/media/series"},
+	}))
+	if err == nil || !strings.Contains(err.Error(), `"spool"`) || !strings.Contains(err.Error(), AccessesSetting) {
+		t.Fatalf("an access nobody placed was not refused by name: %v", err)
+	}
+}
+
+// Validated like endpoints: an id the module does not declare reaches nothing, and the refusal
+// says what it does declare; a relative path and a non-numeric owner are refused too.
+func TestPlacementsAreValidated(t *testing.T) {
+	m := placeable()
+	layers := func(values map[string]any) []Layer { return placedBy(values).Settings["arr"] }
+
+	_, err := Places(m, layers(map[string]any{PlacesSetting: map[string]any{"data": "/mnt/data"}}))
+	if err == nil || !strings.Contains(err.Error(), "does not declare") || !strings.Contains(err.Error(), `"config"`) {
+		t.Fatalf("placing an undeclared directory was accepted: %v", err)
+	}
+	_, err = Places(m, layers(map[string]any{PlacesSetting: map[string]any{"config": "services/arr"}}))
+	if err == nil || !strings.Contains(err.Error(), "absolute") {
+		t.Fatalf("a relative placement was accepted: %v", err)
+	}
+	_, err = Places(m, layers(map[string]any{PlacesSetting: map[string]any{
+		"config": map[string]any{"path": "/services/arr", "owner": "media"}}}))
+	if err == nil || !strings.Contains(err.Error(), "uid:gid") {
+		t.Fatalf("a non-numeric owner was accepted: %v", err)
+	}
+	_, err = AccessPlaces(m, layers(map[string]any{AccessesSetting: map[string]any{"movies": "/storage/media/movies"}}))
+	if err == nil || !strings.Contains(err.Error(), "does not declare") || !strings.Contains(err.Error(), `"series"`) {
+		t.Fatalf("placing an undeclared access was accepted: %v", err)
+	}
+	_, err = AccessPlaces(m, layers(map[string]any{AccessesSetting: map[string]any{"series": "media/series"}}))
+	if err == nil || !strings.Contains(err.Error(), "absolute") {
+		t.Fatalf("a relative access was accepted: %v", err)
+	}
+	// And the two keys are never stray: they are validated here, not merged into a file.
+	if stray := UnusedSettings(m, layers(map[string]any{
+		PlacesSetting:   map[string]any{"config": "/services/arr/config"},
+		AccessesSetting: map[string]any{"series": "/storage/media/series"},
+	})); len(stray) != 0 {
+		t.Fatalf("the placement keys were reported as unused: %v", stray)
+	}
+}
+
+// A definition that carries a path still works, as the default the assignment may replace — and
+// the assignment's placement wins where both say.
+func TestADefinitionsPathIsTheDefaultTheAssignmentReplaces(t *testing.T) {
+	m := placeable()
+	m.Accesses = []Access{{ID: "series", Path: "/services/media/series", Mode: AccessReadWrite}, {ID: "spool", Path: "/services/media/downloads"}}
+	got, err := Resolve(shelf(m), []string{"arr"}, workstation(), World{})
+	if err != nil {
+		t.Fatal(err)
+	}
+	out, err := got.Declaration(placedBy(map[string]any{
+		PlacesSetting:   map[string]any{"config": "/services/arr/config"},
+		AccessesSetting: map[string]any{"series": "/storage/media/series"},
+	}))
+	if err != nil {
+		t.Fatal(err)
+	}
+	var paths []string
+	for _, r := range out {
+		if r["type"] == "access" {
+			paths = append(paths, r["path"].(string))
+		}
+	}
+	if strings.Join(paths, ",") != "/storage/media/series,/services/media/downloads" {
+		t.Fatalf("placed one, defaulted the other: got %v", paths)
+	}
+}
+
+// A reference to an access the definition does not declare is refused where the author is.
+func TestAnUnknownAccessReferenceIsRefusedAtParse(t *testing.T) {
+	_, err := ParseManifest([]byte(`{
+	  "module": "arr", "version": "1",
+	  "accesses": [{"id": "series", "mode": "read-write"}],
+	  "resources": [
+	    {"id": "state", "type": "directory", "place": ".", "mode": "0700"},
+	    {"id": "server", "type": "container", "name": "arr", "image": "arr:1",
+	     "volumes": ["${access:movies}:/movies"]}
+	  ]}`))
+	if err == nil || !strings.Contains(err.Error(), "${access:movies}") {
+		t.Fatalf("a reference to an undeclared access was accepted: %v", err)
+	}
+	_, err = ParseManifest([]byte(`{"module": "arr", "version": "1", "accesses": [{"mode": "read"}]}`))
+	if err == nil || !strings.Contains(err.Error(), "neither an id nor a path") {
+		t.Fatalf("an access with no id and no path was accepted: %v", err)
+	}
+}

internal/catalogue/resolve.go

@@ -179,6 +179,10 @@ type Needed struct {
 	// for one requirement (ADR 0094); empty for the ordinary one. Part of what identifies the pair
 	// credential, so two secrets from one provider to one module are two secrets.
 	Local string
+	// SharedOwn is set when the provision's credential is one of the provider's own secrets, shared
+	// by every consumer (novox/hq ADR 0158): the name of that secret in the provider's definition.
+	// The plan mints the pair's copy from the provider's value rather than a value of its own.
+	SharedOwn string
 	// Manager is set when this holder is a refreshable-grant licence's MANAGER, delivered the refresh
 	// token rather than an access token (novox/hq ADR 0050). It changes one thing downstream: an empty
 	// Sealed is tolerated — the manager has not adopted a refresh token yet, which is a real waiting
@@ -322,7 +326,8 @@ func Resolve(catalogue map[string]Manifest, assigned []string, node Node, world
 				}
 				needs = append(needs, Needed{
 					Name: want, From: node.Name, At: at,
-					Serves: servedHere(catalogue, chosen, want), For: because[want]})
+					Serves: servedHere(catalogue, chosen, want), For: because[want],
+					SharedOwn: sharedHere(catalogue, chosen, want)})
 			} else if served := servedHere(catalogue, chosen, want); len(served) > 0 {
 				// Answered here with no credential to mint, but the provider serves facts the
 				// consumer cannot guess — a port, a model name — and so still needs a binding.
@@ -369,8 +374,12 @@ func Resolve(catalogue map[string]Manifest, assigned []string, node Node, world
 						node.Name, want, p.Node, meshNetwork))
 					return
 				}
+				shared := ""
+				if pm, known := catalogue[p.Module]; known {
+					shared, _ = pm.SharedCredentialOf(want)
+				}
 				needs = append(needs, Needed{Name: want, From: p.Node, At: p.At,
-					Serves: p.Serves, For: because[want]})
+					Serves: p.Serves, For: because[want], SharedOwn: shared})
 			}
 			switch {
 			case world.Unchecked:
@@ -588,6 +597,20 @@ func Resolve(catalogue map[string]Manifest, assigned []string, node Node, world
 // need that is never created is a binding the consumer never gets. It is right about that from the
 // manifest alone, which is why walking the catalogue mid-resolution is enough here and is not
 // enough for the values.
+// sharedHere is the own secret the provider of a provision on this same machine names as its
+// credential (ADR 0158), or "" when the provider gives each consumer its own.
+func sharedHere(catalogue map[string]Manifest, chosen map[string]bool, want string) string {
+	for name, m := range catalogue {
+		if !chosen[name] {
+			continue
+		}
+		if own, shared := m.SharedCredentialOf(want); shared {
+			return own
+		}
+	}
+	return ""
+}
+
 func servedHere(catalogue map[string]Manifest, chosen map[string]bool, want string) map[string]any {
 	for name, m := range catalogue {
 		if !chosen[name] {
@@ -791,6 +814,9 @@ func checkResources(modules []Manifest) []string {
 	// which is what lets the stack in 04-ISSUES/036 co-resolve.
 	for _, m := range modules {
 		for _, a := range m.Accesses {
+			if a.Path == "" {
+				continue // placed by the assignment; nothing to compare at registration
+			}
 			switch other := ownedPath[a.Path]; other {
 			case "":
 				// Nobody owns it — the ordinary, correct case for shared data.

internal/catalogue/seats.go

@@ -37,7 +37,9 @@ type Seat struct {
 	// today — which the bus refuses, because a namespace belongs to who it is named for.
 	Accepts []string
 	Emits   []string
-	Serves  []string
+	// Serves carries each verb in full — name, description, schema — because a role's tools are the
+	// mesh's to define and an agent's to call (novox/hq ADR 0132, design 33 §2).
+	Serves []Verb
 	// Decision is the record that made it a seat.
 	Decision string
 }
@@ -51,8 +53,12 @@ var defaultSeats = []Seat{
 	// The control plane states what it did under the seat it holds (novox/hq ADR 0134): a role's
 	// events belong to the role, so they keep their address while the holder is replaced. No accepts,
 	// so no work queue is raised for it — only what its holder may say.
-	{Name: "mesh-controller", Scope: ScopeMesh, Decision: "novox/hq ADR 0079",
+	// And it serves the mesh's own verbs as the seat's tools (novox/hq ADR 0154): `status`, `push`,
-		Emits: []string{"applied", "refused", "built-before"}},
+	// `assign` and the rest are a role's interface, not a container's, and stay addressable while
+	// the control plane is replaced.
+	{Name: ControllerSeatName, Scope: ScopeMesh, Decision: "novox/hq ADR 0079",
+		Emits:  []string{"applied", "refused", "built-before"},
+		Serves: ControllerVerbs},
 	{Name: "mesh-store", Scope: ScopeMesh, Delivers: "postgres-database", Decision: "novox/hq ADR 0079"},
 	// **Delivers the mesh's own bus, not `amqp`.** Those were the same word until
 	// ADR 0127 separated them: `amqp` is a backing service a module may require, and this seat is
@@ -60,7 +66,11 @@ var defaultSeats = []Seat{
 	// rather than receives ambiently — 23 of the catalogue's modules never speak, and an ambient
 	// connection would mint a credential for each.
 	{Name: "mesh-broker", Scope: ScopeMesh, Delivers: "mesh-bus", Decision: "novox/hq ADR 0079"},
-	{Name: "the-artifact-store", Scope: ScopeMesh, Delivers: "artifact-store", Decision: "novox/hq ADR 0075"},
+	// Named for its scope since 2026-09-30 (novox/hq ADR 0156); `the-artifact-store` resolves to it as
+	// an alias on a mesh that predates the rename. It serves artifacts of every kind a build makes —
+	// images and archives, by digest — which is why the provision is the artifact store and not an
+	// image registry.
+	{Name: "mesh-artifact-store", Scope: ScopeMesh, Delivers: "artifact-store", Decision: "novox/hq ADR 0075"},
 	{Name: "mesh-catalog", Scope: ScopeMesh, Decision: "novox/hq ADR 0121"},
 	// Deferred renames (novox/hq ADR 0121): these deliver a provision, so renaming them is a
 	// delivering-seat migration with a mesh-wide cascade if a holder stops resolving mid-flight.
@@ -70,8 +80,11 @@ var defaultSeats = []Seat{
 	// A build is work submitted to this role and its outcome is the role's own event (ADR 0129).
 	// One publish reaches whoever asked, the controller that records it, and the catalogue that
 	// places it in the graph — what the old bus's shared exchange did for free.
+	// A build says what it does as it does it (novox/hq ADR 0157): `started` when work is taken,
+	// `log.<build id>` for every line, `built` for the outcome. The log's tail token is the build's
+	// id, so a reader follows one build by subject alone.
 	{Name: "mesh-build-machine", Scope: ScopeMesh,
-		Accepts: []string{"build"}, Emits: []string{"built"}, Decision: "novox/hq ADR 0121"},
+		Accepts: []string{"build"}, Emits: []string{"started", "built", "log.*"}, Decision: "novox/hq ADR 0121"},
 	{Name: "node-dns-resolver", Scope: ScopeNode, Decision: "novox/hq ADR 0121"},
 	{Name: "node-intrusion-prevention", Scope: ScopeNode, Decision: "novox/hq ADR 0121"},
 	{Name: "node-packet-filter", Scope: ScopeNode, Decision: "novox/hq ADR 0121"},
@@ -91,8 +104,9 @@ var defaultSeats = []Seat{
 // A system seat name is the control plane's namespace: `mesh-*` for a mesh-wide role, `node-*` for
 // a per-node one (novox/hq ADR 0121). A claim to a system name the mesh does not define is refused;
 // any other name is a module's own to define and claim. Some of the mesh's own seats predate this
-// convention and are not yet renamed (git, npm-package-registry, the-artifact-store,
+// convention and are not yet renamed (git, npm-package-registry, the-private-network) — those are
-// the-private-network) — those are in the set, so they resolve by name, not by prefix.
+// in the set, so they resolve by name, not by prefix. the-artifact-store was renamed on 2026-09-30
+// (novox/hq ADR 0156) and resolves through the alias table on a mesh that knew it.
 func isSystemSeatName(name string) bool {
 	return strings.HasPrefix(name, "mesh-") || strings.HasPrefix(name, "node-")
 }
@@ -269,6 +283,14 @@ func CanHold(m Manifest, seat Seat) error {
 		return fmt.Errorf("%s claims %s, whose holder answers for %q, and %s does not provide %q at %s scope",
 			m.Module, seat.Name, seat.Delivers, m.Module, seat.Delivers, seat.Scope)
 	}
+	// **Serving the seat's tools is a condition of holding it** (novox/hq ADR 0132). A holder that
+	// does not answer what the role promises is every caller's timeout, found at registration and
+	// at handover instead, naming the verbs rather than the fact that something is missing.
+	if missing := unservedVerbs(m.Tools, seat.Serves); len(missing) > 0 {
+		return fmt.Errorf("%s claims %s but does not serve %s, which that seat's protocol promises "+
+			"(novox/hq ADR 0132) — a holder lists every verb its seat declares under tools",
+			m.Module, seat.Name, strings.Join(missing, ", "))
+	}
 	return nil
 }
 

internal/catalogue/seats_declared.go

@@ -38,8 +38,9 @@ type SeatDeclaration struct {
 	Accepts []string `json:"accepts,omitempty"`
 	// Emits are the verbs the holder publishes: 1:many, nobody obliged to act.
 	Emits []string `json:"emits,omitempty"`
-	// Serves are the verbs the holder answers: request and reply, awaited.
+	// Serves are the verbs the holder answers: request and reply, awaited. A bare name, or the
-	Serves []string `json:"serves,omitempty"`
+	// verb in full with its schema (novox/hq ADR 0132).
+	Serves []Verb `json:"serves,omitempty"`
 
 	// RetainSeconds is how long the inbound backlog survives with no holder, zero for the
 	// mesh's default. Retention belongs to whoever owns the namespace (design 29 §3) — a seat
@@ -62,7 +63,7 @@ func (s SeatDeclaration) At() string {
 func (s SeatDeclaration) verbs() []string {
 	out := append([]string{}, s.Accepts...)
 	out = append(out, s.Emits...)
-	return append(out, s.Serves...)
+	return append(out, VerbNames(s.Serves)...)
 }
 
 // declaredSeatProblems is what one manifest can be judged on alone.
@@ -228,8 +229,8 @@ func unserved(m Manifest, s SeatDeclaration) []string {
 	}
 	var missing []string
 	for _, t := range s.Serves {
-		if !has[t] {
+		if !has[t.Name] {
-			missing = append(missing, t)
+			missing = append(missing, t.Name)
 		}
 	}
 	return missing

internal/catalogue/seats_declared_test.go

@@ -13,7 +13,7 @@ func problemsFor(t *testing.T, shelf Shelf) string {
 func telegram() Manifest {
 	return Manifest{Module: "telegram", Tools: []string{"status"}, DefinesSeats: []SeatDeclaration{{
 		Name: "telegram-sender", Scope: ScopeMesh,
-		Accepts: []string{"send"}, Emits: []string{"delivered", "failed"}, Serves: []string{"status"},
+		Accepts: []string{"send"}, Emits: []string{"delivered", "failed"}, Serves: []Verb{{Name: "status"}},
 	}}, Claims: []Claim{{Name: "telegram-sender", Scope: ScopeMesh}}}
 }
 

internal/catalogue/secrets_in_environment_test.go

@@ -15,7 +15,7 @@ func aModuleWithAnEnvFileSecret(exception string) Manifest {
 	}
 	return Manifest{
 		Module: "app", Version: "1",
-		OwnSecrets: map[string]string{"token": "/var/lib/app/token.secret"},
+		OwnSecrets: OwnSecrets{"token": {Path: "/var/lib/app/token.secret"}},
 		Resources: []map[string]any{
 			{"id": "env", "type": "file", "path": "/var/lib/app/server.env", "mode": "0600",
 				"content": "APP_TOKEN=${secret:token}\n"},

internal/catalogue/secrets_into_files_test.go

@@ -25,7 +25,7 @@ func fileNamed(out []map[string]any, id string) map[string]any {
 func TestAFileGetsTheSecretItsContentAsksFor(t *testing.T) {
 	r := Resolution{Node: "anchor", Modules: []Manifest{{
 		Module:     "gitea",
-		OwnSecrets: map[string]string{"admin": "/var/lib/gitea/admin.env"},
+		OwnSecrets: OwnSecrets{"admin": {Path: "/var/lib/gitea/admin.env"}},
 		Resources: []map[string]any{{
 			"id": "conf", "type": "file", "path": "/etc/gitea/app.ini",
 			"content": "[security]\nSECRET_KEY = ${secret:admin}\n",
@@ -130,7 +130,7 @@ func TestTwoConsumersOfOneProvisionEachGetTheirOwnInAPlaceholderFile(t *testing.
 func TestAFileNamingASecretTheModuleDoesNotHaveIsRefused(t *testing.T) {
 	r := Resolution{Node: "anchor", Modules: []Manifest{{
 		Module:     "gitea",
-		OwnSecrets: map[string]string{"admin": "/var/lib/gitea/admin.env"},
+		OwnSecrets: OwnSecrets{"admin": {Path: "/var/lib/gitea/admin.env"}},
 		Resources: []map[string]any{{
 			"id": "conf", "type": "file", "path": "/etc/gitea/app.ini",
 			"content": "SECRET_KEY = ${secret:adnim}\n",
@@ -151,7 +151,7 @@ func TestAFileNamingASecretTheModuleDoesNotHaveIsRefused(t *testing.T) {
 // One module may not read another's credential by guessing its name.
 func TestAFileCannotNameAnotherModulesSecret(t *testing.T) {
 	r := Resolution{Node: "anchor", Modules: []Manifest{
-		{Module: "postgres", OwnSecrets: map[string]string{"superuser": "/var/lib/postgres/su.env"}},
+		{Module: "postgres", OwnSecrets: OwnSecrets{"superuser": {Path: "/var/lib/postgres/su.env"}}},
 		{Module: "gitea", Resources: []map[string]any{{
 			"id": "conf", "type": "file", "path": "/etc/gitea/app.ini",
 			"content": "PASSWORD=${secret:superuser}\n",
@@ -174,7 +174,7 @@ func TestAFileCannotNameAnotherModulesSecret(t *testing.T) {
 func TestASettingThatCarriesAPlaceholderIsStillFilled(t *testing.T) {
 	r := Resolution{Node: "workstation", Modules: []Manifest{{
 		Module:     "chat",
-		OwnSecrets: map[string]string{"api-token": "/home/operator/.config/chat/token"},
+		OwnSecrets: OwnSecrets{"api-token": {Path: "/home/operator/.config/chat/token"}},
 		Resources: []map[string]any{{
 			"id": "settings", "type": "file", "merge": "json",
 			"path": "/home/operator/.config/chat/settings.json", "content": "{}",
@@ -207,7 +207,7 @@ func TestANameMeaningTwoThingsIsRefused(t *testing.T) {
 		Node: "anchor",
 		Modules: []Manifest{{
 			Module:     "thing",
-			OwnSecrets: map[string]string{"store": "/var/lib/thing/own.env"},
+			OwnSecrets: OwnSecrets{"store": {Path: "/var/lib/thing/own.env"}},
 			Secrets:    map[string]string{"store": "/var/lib/thing/granted.env"},
 		}},
 		Needs: []Needed{{Name: "store", From: "anchor", Sealed: "sealed-granted"}},
@@ -225,7 +225,7 @@ func TestANameMeaningTwoThingsIsRefused(t *testing.T) {
 func TestAFileWithNoPlaceholderIsLeftAlone(t *testing.T) {
 	r := Resolution{Node: "anchor", Modules: []Manifest{{
 		Module:     "gitea",
-		OwnSecrets: map[string]string{"admin": "/var/lib/gitea/admin.env"},
+		OwnSecrets: OwnSecrets{"admin": {Path: "/var/lib/gitea/admin.env"}},
 		Resources: []map[string]any{{
 			"id": "conf", "type": "file", "path": "/etc/gitea/app.ini", "content": "RUN_MODE=prod\n",
 		}},

internal/catalogue/setting_into.go

@@ -0,0 +1,130 @@
+package catalogue
+
+import (
+	"fmt"
+	"regexp"
+	"sort"
+	"strings"
+)
+
+// An operator's value, where a definition needs one (novox/hq ADR 0112, ADR 0155, design 27).
+//
+// A mail server's domain, a site's name, the address a proxy forwards from: values that are true of
+// one installation and of no other, and that a module's software must be told. They had nowhere to
+// live but the definition, which is how a catalogue meant for any mesh came to name this one
+// (novox/hq issues 122, 134). ADR 0112 names the operator as one of the four providers; this is the
+// operator answering.
+//
+// `${setting:<key>}` in a file's content is filled from the module's settings layers — the mesh's,
+// then this node's — the same layers a mergeable JSON file and a contribution already take, so
+// `settings set <module>` is the one place a person's values go. **Refused when no layer sets it**,
+// naming the key and the remedy: a definition that carried a default for a mail domain would be
+// carrying the very literal this removes, and a blank written silently would be a service that
+// comes up wrong somewhere that names neither the module nor the key.
+
+// settingRef is how a definition asks for an operator's value: ${setting:<key>}.
+var settingRef = regexp.MustCompile(`\$\{setting:([a-z0-9][a-z0-9_.-]*)\}`)
+
+// settingsUsed is every key a file's content asks for, once each, in order of first use.
+func settingsUsed(content string) []string {
+	var keys []string
+	seen := map[string]bool{}
+	for _, m := range settingRef.FindAllStringSubmatch(content, -1) {
+		if !seen[m[1]] {
+			seen[m[1]] = true
+			keys = append(keys, m[1])
+		}
+	}
+	return keys
+}
+
+// settingInto fills a file's ${setting:…} placeholders from the layers over a module.
+//
+// The last layer setting a key wins, which is the node's over the mesh's — the same order settle
+// applies to a mergeable file. A value that is not a string is written the way a program would read
+// it (a number without a trailing .000000, a boolean as true/false).
+func settingInto(resource map[string]any, layers []Layer, module string) error {
+	if fmt.Sprint(resource["type"]) != "file" {
+		return nil
+	}
+	content, ok := resource["content"].(string)
+	if !ok {
+		return nil
+	}
+	for _, key := range settingsUsed(content) {
+		value, set := settingValue(layers, key)
+		if !set {
+			return fmt.Errorf(
+				"%s has a file that says ${setting:%s}, and nothing sets %q for it — an operator's "+
+					"value is the assignment's, never the definition's (novox/hq ADR 0112): "+
+					"`settings set %s <file>` with {%q: …}%s",
+				module, key, key, module, key, orNoSettings(layers))
+		}
+		content = strings.ReplaceAll(content, "${setting:"+key+"}", plainly(value))
+	}
+	resource["content"] = content
+	return nil
+}
+
+func settingValue(layers []Layer, key string) (any, bool) {
+	var value any
+	set := false
+	for _, layer := range layers {
+		if v, has := layer.Values[key]; has {
+			value, set = v, true
+		}
+	}
+	return value, set
+}
+
+func orNoSettings(layers []Layer) string {
+	var keys []string
+	for _, l := range layers {
+		for k := range l.Values {
+			keys = append(keys, k)
+		}
+	}
+	if len(keys) == 0 {
+		return "; no setting is set for this module"
+	}
+	sort.Strings(keys)
+	return "; set today: " + strings.Join(keys, ", ")
+}
+
+// settingKeysUsedBy is every key a module's files, contributions and served facts ask for, so a
+// setting that lands in one is not called stray.
+func settingKeysUsedBy(m Manifest) map[string]bool {
+	used := map[string]bool{}
+	note := func(s string) {
+		for _, k := range settingsUsed(s) {
+			used[k] = true
+		}
+	}
+	for _, r := range m.Resources {
+		if fmt.Sprint(r["type"]) != "file" {
+			continue
+		}
+		if content, ok := r["content"].(string); ok {
+			note(content)
+		}
+	}
+	inValues := func(values map[string]any) {
+		for _, v := range values {
+			if s, ok := v.(string); ok {
+				note(s)
+			}
+		}
+	}
+	for _, values := range m.Contributes {
+		inValues(values)
+	}
+	for _, locals := range m.ContributesMany {
+		for _, values := range locals {
+			inValues(values)
+		}
+	}
+	for _, values := range m.Serves {
+		inValues(values)
+	}
+	return used
+}

internal/catalogue/setting_into_test.go

@@ -0,0 +1,55 @@
+package catalogue
+
+import (
+	"strings"
+	"testing"
+)
+
+// An operator's value reaches a file from the assignment's settings, the node's layer over the
+// mesh's (novox/hq ADR 0112, ADR 0155), and a value nothing set is refused by name.
+func TestASettingReachesAFileFromTheLayers(t *testing.T) {
+	file := map[string]any{"id": "env", "type": "file", "path": "/x/mail.env",
+		"content": "DOMAIN=${setting:domain}\nSITENAME=${setting:sitename}\nWORKERS=${setting:workers}\n"}
+	layers := []Layer{
+		{From: "the mesh", Values: map[string]any{"domain": "example.tld", "sitename": "Mesh", "workers": float64(4)}},
+		{From: "this node", Values: map[string]any{"sitename": "This one"}},
+	}
+	if err := settingInto(file, layers, "mail"); err != nil {
+		t.Fatal(err)
+	}
+	if file["content"] != "DOMAIN=example.tld\nSITENAME=This one\nWORKERS=4\n" {
+		t.Fatalf("filled as %q", file["content"])
+	}
+}
+
+func TestASettingNothingSetIsRefusedByName(t *testing.T) {
+	file := map[string]any{"id": "env", "type": "file", "content": "DOMAIN=${setting:domain}\n"}
+	err := settingInto(file, []Layer{{From: "the mesh", Values: map[string]any{"other": "x"}}}, "mail")
+	if err == nil {
+		t.Fatal("a setting nothing set was written as something")
+	}
+	for _, want := range []string{"${setting:domain}", "settings set mail", "set today: other"} {
+		if !strings.Contains(err.Error(), want) {
+			t.Fatalf("the refusal lacks %q: %v", want, err)
+		}
+	}
+	// Left as it was: the literal placeholder must never reach a machine.
+	if file["content"] != "DOMAIN=${setting:domain}\n" {
+		t.Fatalf("content was changed on refusal: %q", file["content"])
+	}
+}
+
+// A key a file asks for is a destination, so setting it is not called stray.
+func TestASettingAFileAsksForIsNotStray(t *testing.T) {
+	m := Manifest{Module: "mail", Resources: []map[string]any{
+		{"id": "env", "type": "file", "content": "DOMAIN=${setting:domain}\n"},
+	}}
+	layers := []Layer{{From: "the mesh", Values: map[string]any{"domain": "example.tld", "stray": "x"}}}
+	unused := strings.Join(UnusedSettings(m, layers), "; ")
+	if strings.Contains(unused, `"domain"`) {
+		t.Fatalf("a key a file asks for was called stray: %s", unused)
+	}
+	if !strings.Contains(unused, `"stray"`) {
+		t.Fatalf("a key nothing reads was not named: %s", unused)
+	}
+}

internal/catalogue/settings.go

@@ -85,17 +85,67 @@ func ApplySettings(resource map[string]any, layers []Layer) (map[string]any, err
 	return out, nil
 }
 
-// Settle lays settings over a module's own values. Exported for what a provider serves, which is
+// Settle lays settings over what a provider serves. Exported because a served fact is settled where
-// settled where the mesh is walked rather than where a node is declared.
+// the mesh is walked rather than where a node is declared.
+//
+// **A setting overrides a served key; it never adds one** (novox/hq 04-ISSUES/173). What a consumer
+// is told is the provider's contract, and a setting made for one of the provider's files — a site
+// name, a public address — is not part of it. Before this, every setting of a module reached every
+// consumer of every provision it served.
 func Settle(base map[string]any, layers []Layer) (map[string]any, error) {
-	return settle(base, layers, nil, "what is served")
+	return overridden(base, layers, "what is served")
+}
+
+// overridden lays settings over a map whose keys are its contract: a contribution, a served fact.
+// Only the keys the map already declares are touched; the rest of a layer is somebody else's
+// business (a file's, another destination's) and is left to reach it there.
+//
+// A declared value may itself be the operator's, `${setting:<key>}` (ADR 0155): a mail provider
+// serves its domain, an identity provider its issuer, and neither is the definition's to state.
+// Filled from the layers after the overrides, and refused by name when nothing sets it — a literal
+// placeholder handed to a consumer is a service configured against a string nobody meant.
+func overridden(base map[string]any, layers []Layer, what string) (map[string]any, error) {
+	kept := make([]Layer, 0, len(layers))
+	for _, layer := range layers {
+		values := map[string]any{}
+		for key, value := range layer.Values {
+			if _, declared := base[key]; declared {
+				values[key] = value
+			}
+		}
+		kept = append(kept, Layer{From: layer.From, Values: values})
+	}
+	merged, err := settle(base, kept, nil, what)
+	if err != nil {
+		return nil, err
+	}
+	for key, value := range merged {
+		s, ok := value.(string)
+		if !ok {
+			continue
+		}
+		for _, asked := range settingsUsed(s) {
+			v, set := settingValue(layers, asked)
+			if !set {
+				return nil, fmt.Errorf(
+					"%s says ${setting:%s} for %q, and nothing sets %q — an operator's value is the "+
+						"assignment's, never the definition's (novox/hq ADR 0112)%s",
+					what, asked, key, asked, orNoSettings(layers))
+			}
+			s = strings.ReplaceAll(s, "${setting:"+asked+"}", plainly(v))
+		}
+		merged[key] = s
+	}
+	return merged, nil
 }
 
 // settle lays the layers over a module's own values, in order.
 //
 // Shared by a file's content and a module's contributions, because they are the same act: the
 // module says what it means by default, and somebody says what it means here. A contribution that
-// could not be settled would have to be edited to be reused anywhere else.
+// could not be settled would have to be edited to be reused anywhere else. The two differ in one
+// respect, and the caller decides it: a file takes keys it did not declare (a setting may add to a
+// configuration), a contribution or served fact does not (overridden).
 func settle(base map[string]any, layers []Layer, protected map[string]bool, what string) (
 	map[string]any, error) {
 	merged := deepCopy(base)
@@ -149,23 +199,22 @@ func deepCopy(in map[string]any) map[string]any {
 	return out
 }
 
-// UnusedSettings names settings that reached no file.
+// UnusedSettings names settings that reach nothing.
 //
 // Somebody who sets a key on a module with nothing mergeable, or misspells one, has changed
 // nothing — and would find out by the machine not behaving differently, which is the slowest
 // way there is. This is what makes that visible at the moment they set it.
+//
+// Where a key can land: any mergeable file takes any key; a file asking for `${setting:<key>}`
+// takes that key (ADR 0155); a contribution or a served fact takes a key it declares, and no other
+// (novox/hq 04-ISSUES/173); and the mesh's own words — `expose`, `ports`, `reach`, `endpoints` —
+// are read by the mesh. A key none of those takes is stray, and is said so rather than dropped.
 func UnusedSettings(m Manifest, layers []Layer) []string {
 	for _, r := range m.Resources {
 		if how, _ := r["merge"].(string); how != "" {
 			return nil
 		}
 	}
-	// A contribution is a destination too. A route's hostname is exactly the kind of thing that
-	// differs between one mesh and the next, and calling it stray would refuse the one setting
-	// most modules that publish anything will have.
-	if len(m.Contributes) > 0 {
-		return nil
-	}
 	// A computed module has no resources here to look at — they are worked out per node, and
 	// whether a setting lands is not knowable until then. Silence rather than a wrong answer:
 	// claiming every setting on the private network is stray would be worse than saying nothing.
@@ -173,9 +222,30 @@ func UnusedSettings(m Manifest, layers []Layer) []string {
 		return nil
 	}
 
+	lands := settingKeysUsedBy(m)
+	for _, values := range m.Contributes {
+		for key := range values {
+			lands[key] = true
+		}
+	}
+	for _, locals := range m.ContributesMany {
+		for _, values := range locals {
+			for key := range values {
+				lands[key] = true
+			}
+		}
+	}
+	for _, served := range m.Serves {
+		for key := range served {
+			lands[key] = true
+		}
+	}
 	var unused []string
 	for _, layer := range layers {
 		for key := range layer.Values {
+			if lands[key] {
+				continue
+			}
 			// `expose` is a real destination for a module that listens: it overrides a port's
 			// source (novox/hq ADR 0046), validated in Exposure, so it is not stray here.
 			if key == ExposeSetting && len(m.Listens) > 0 {
@@ -197,9 +267,18 @@ func UnusedSettings(m Manifest, layers []Layer) []string {
 			if key == EndpointsSetting && len(m.Listens) > 0 {
 				continue
 			}
+			// `places` puts a declared directory where this machine keeps it, `accesses` says where
+			// the operator's data is (novox/hq issue 153). Validated in Places and AccessPlaces.
+			if key == PlacesSetting && len(directoriesOf(m)) > 0 {
+				continue
+			}
+			if key == AccessesSetting && len(m.Accesses) > 0 {
+				continue
+			}
 			unused = append(unused, fmt.Sprintf(
-				"%s sets %q, and %s has no file or contribution to merge it into",
+				"%s sets %q, and %s has no file that merges it, asks for no ${setting:%s}, and "+
-				layer.From, key, m.Module))
+					"declares no %q in what it contributes or serves",
+				layer.From, key, m.Module, key, key))
 		}
 	}
 	sort.Strings(unused)

internal/catalogue/settings_test.go

@@ -167,11 +167,45 @@ func TestSettingsThatReachNothingAreNamed(t *testing.T) {
 		{"id": "conf", "type": "file", "path": "/etc/thing", "content": "plain"},
 	}}
 	unused := UnusedSettings(m, []Layer{{From: "node", Values: map[string]any{"port": 1}}})
-	if len(unused) != 1 || !strings.Contains(unused[0], "no file or contribution to merge it into") {
+	if len(unused) != 1 || !strings.Contains(unused[0], "no file that merges it") {
 		t.Errorf("settings that reached nothing were not named: %v", unused)
 	}
 }
 
+func TestASettingLandsOnlyWhereSomethingDeclaresIt(t *testing.T) {
+	// novox/hq 04-ISSUES/173. A module that contributes a route and serves a provision takes a
+	// setting for a key either declares, and a setting for a key neither declares is stray — it
+	// would not reach the route or the served fact, so it must be said rather than dropped.
+	m := Manifest{Module: "mail",
+		Contributes: map[string]map[string]any{"reverse-proxy": {"host": "mail", "port": 8080}},
+		Serves:      map[string]map[string]any{"smtp": {"host": "mail", "port": 25}},
+		Resources: []map[string]any{
+			{"id": "env", "type": "file", "path": "/etc/mail.env", "content": "SITE=${setting:sitename}\n"},
+		}}
+	layers := []Layer{{From: "the mesh", Values: map[string]any{
+		"host": "post", "sitename": "Mail", "website": "https://www.example.tld"}}}
+	unused := UnusedSettings(m, layers)
+	if len(unused) != 1 || !strings.Contains(unused[0], `"website"`) {
+		t.Errorf("only website reaches nothing; named: %v", unused)
+	}
+}
+
+func TestASettingOverridesAServedKeyAndAddsNone(t *testing.T) {
+	// What a consumer is told is the provider's contract. A setting made for one of the
+	// provider's files — its site name, its public address — is not part of it.
+	served, err := Settle(map[string]any{"host": "mail", "port": 25},
+		[]Layer{{From: "the mesh", Values: map[string]any{"host": "post", "sitename": "Mail"}}})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if served["host"] != "post" {
+		t.Errorf("the setting did not override the served host: %v", served)
+	}
+	if _, leaked := served["sitename"]; leaked {
+		t.Errorf("a setting for a file reached the consumers: %v", served)
+	}
+}
+
 func TestContentThatIsNotJSONIsRefusedWhereSomebodyIsLooking(t *testing.T) {
 	// Rather than on the machine, at apply time, as a file the program cannot read.
 	_, err := ApplySettings(file(`this is not json`), nil)
@@ -179,3 +213,24 @@ func TestContentThatIsNotJSONIsRefusedWhereSomebodyIsLooking(t *testing.T) {
 		t.Fatal("a module claiming to merge as JSON shipped something else and was accepted")
 	}
 }
+
+func TestAServedValueMayBeTheOperators(t *testing.T) {
+	// A mail provider serves its domain and an identity provider its issuer; neither is the
+	// definition's to state (ADR 0155). Filled from the layers, refused by name when unset.
+	served, err := Settle(map[string]any{"port": 587, "domain": "${setting:domain}"},
+		[]Layer{{From: "the mesh", Values: map[string]any{"domain": "example.tld"}}})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if served["domain"] != "example.tld" {
+		t.Errorf("the operator's value did not fill the served key: %v", served)
+	}
+	_, err = Settle(map[string]any{"domain": "${setting:domain}"}, nil)
+	if err == nil || !strings.Contains(err.Error(), `"domain"`) {
+		t.Errorf("a served value nothing sets must be refused by name; got %v", err)
+	}
+	m := Manifest{Module: "mail", Serves: map[string]map[string]any{"smtp": {"domain": "${setting:domain}"}}}
+	if unused := UnusedSettings(m, []Layer{{From: "the mesh", Values: map[string]any{"domain": "x"}}}); len(unused) != 0 {
+		t.Errorf("a setting a served fact asks for is not stray: %v", unused)
+	}
+}

internal/catalogue/shared_credential_test.go

@@ -0,0 +1,79 @@
+package catalogue
+
+import (
+	"strings"
+	"testing"
+)
+
+// A provider with one credential shares it (novox/hq ADR 0158): the offer names the own secret, the
+// secret says how it is taken, and a consumer's need carries the name so the plan mints its copy
+// from the provider's value.
+func TestAnOfferMayNameAnOwnSecretAsItsCredential(t *testing.T) {
+	m, err := ParseManifest([]byte(`{"module":"downloader","version":"1",
+		"own-secrets":{"password":{"path":"/var/lib/mesh/downloader/password","taken":"at-start"}},
+		"provides":[{"name":"downloader-api","credential":{"own":"password"}}],
+		"serves":{"downloader-api":{"port":8080,"username":"admin"}}}`))
+	if err != nil {
+		t.Fatal(err)
+	}
+	if own, shared := m.SharedCredentialOf("downloader-api"); !shared || own != "password" {
+		t.Fatalf("the offer's credential was not read: %v %v", own, shared)
+	}
+	if got := m.ProvisionsSharing("password"); len(got) != 1 || got[0] != "downloader-api" {
+		t.Fatalf("the provisions sharing the secret: %v", got)
+	}
+
+	for want, raw := range map[string]string{
+		"declares no such secret": `{"module":"d","version":"1","provides":[{"name":"d-api","credential":{"own":"password"}}]}`,
+		"must say how the module takes it": `{"module":"d","version":"1","own-secrets":{"password":"/p"},
+			"provides":[{"name":"d-api","credential":{"own":"password"}}]}`,
+		"names no own secret": `{"module":"d","version":"1","provides":[{"name":"d-api","credential":{"own":""}}]}`,
+	} {
+		if _, err := ParseManifest([]byte(raw)); err == nil || !strings.Contains(err.Error(), want) {
+			t.Errorf("expected a refusal saying %q, got %v", want, err)
+		}
+	}
+}
+
+func sharingShelf() map[string]Manifest {
+	return shelf(
+		Manifest{Module: "downloader", Version: "1",
+			Provides:   []Offer{{Name: "downloader-api", Scope: ScopeMesh, Credential: &OfferCredential{Own: "password"}}},
+			OwnSecrets: OwnSecrets{"password": {Path: "/var/lib/mesh/downloader/password", Taken: TakenAtStart}},
+			Serves:     map[string]map[string]any{"downloader-api": {"port": 8080, "username": "admin"}}},
+		Manifest{Module: "manager", Version: "1", Requires: []string{"downloader-api"}},
+	)
+}
+
+func TestAConsumersNeedCarriesTheSharedSecretsName(t *testing.T) {
+	// On the same machine.
+	together, err := Resolve(sharingShelf(), []string{"downloader", "manager"}, workstation(), World{})
+	if err != nil {
+		t.Fatal(err)
+	}
+	found := false
+	for _, n := range together.Needs {
+		if n.Name == "downloader-api" && n.For == "manager" {
+			found = true
+			if n.SharedOwn != "password" {
+				t.Fatalf("the need on one machine does not name the shared secret: %+v", n)
+			}
+		}
+	}
+	if !found {
+		t.Fatalf("the manager's need was not resolved: %+v", together.Needs)
+	}
+	// Across machines, the provider known by its module.
+	apart, err := Resolve(sharingShelf(), []string{"manager"}, onBoth("example.tld"), World{
+		Offered: map[string][]Provider{"downloader-api": {{Node: "home-server", At: "home-server.internal",
+			Module: "downloader", Serves: map[string]any{"port": 8080}}}},
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+	for _, n := range apart.Needs {
+		if n.Name == "downloader-api" && n.SharedOwn != "password" {
+			t.Fatalf("the need across machines does not name the shared secret: %+v", n)
+		}
+	}
+}

internal/catalogue/verbs.go

@@ -0,0 +1,151 @@
+package catalogue
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+)
+
+// A Verb is one tool a role serves: its name, what it does, and the schema of its arguments and of
+// its answer (novox/hq ADR 0132, design 33 §2).
+//
+// **A name alone is not callable by something that has never seen the mesh before**, which is the
+// whole population a tool surface exists for. So a seat's protocol carries the definition, in the
+// form an agent protocol already uses — a JSON schema for the input — so nothing translates between
+// a seat's idea of an argument and the caller's.
+//
+// A manifest may still write a bare verb name (`"serves": ["price"]`); that is a Verb with only a
+// name, and the module's runtime answers `tools` with the rest. The two forms read into one type so
+// nothing downstream cares which was written.
+type Verb struct {
+	Name        string         `json:"name"`
+	Description string         `json:"description,omitempty"`
+	Input       map[string]any `json:"input,omitempty"`
+	Output      map[string]any `json:"output,omitempty"`
+}
+
+func (v *Verb) UnmarshalJSON(raw []byte) error {
+	trimmed := bytes.TrimSpace(raw)
+	if len(trimmed) > 0 && trimmed[0] == '"' {
+		var name string
+		if err := json.Unmarshal(trimmed, &name); err != nil {
+			return err
+		}
+		*v = Verb{Name: name}
+		return nil
+	}
+	// Strictly, like the manifest around it: a misspelt key in a tool's definition would otherwise
+	// describe a tool nobody can call and refuse nothing.
+	type plain Verb
+	var p plain
+	decoder := json.NewDecoder(bytes.NewReader(trimmed))
+	decoder.DisallowUnknownFields()
+	if err := decoder.Decode(&p); err != nil {
+		return fmt.Errorf("a served verb is a name or {name, description, input, output}: %w", err)
+	}
+	if p.Name == "" {
+		return fmt.Errorf("a served verb has no name: %s", trimmed)
+	}
+	*v = Verb(p)
+	return nil
+}
+
+// VerbNames are the names alone, for the grants and the checks that care about nothing else.
+func VerbNames(verbs []Verb) []string {
+	out := make([]string, 0, len(verbs))
+	for _, v := range verbs {
+		out = append(out, v.Name)
+	}
+	return out
+}
+
+// ControllerSeatName is the seat the control plane holds, whose tools are the mesh's own verbs.
+const ControllerSeatName = "mesh-controller"
+
+// ControllerVerbs are the mesh's own verbs, as the `mesh-controller` seat's tools (novox/hq ADR 0154).
+//
+// **The same function the command line calls, and nothing the tool adds** (ADR 0035): each of these
+// is a command the controller's binary already answers, run by the holder of the seat with the
+// arguments below and answered with what the command printed. A verb here is a contract every future
+// holder must implement, which is why the list is short and made of what an operator asks weekly.
+// Additive within a version (design 33 §7); a verb that would break a caller takes a new version.
+var ControllerVerbs = []Verb{
+	{Name: "tools", Description: "Every seat's tools, from the mesh's own records: what each role " +
+		"answers, whether or not its holder is up. The mesh's own verbs are the mesh-controller seat's.",
+		Input: schema(nil, nil)},
+	{Name: "status", Description: "What is wrong, what is quiet, what is out of date, and which " +
+		"machines are behind what the mesh would send them.",
+		Input: schema(nil, nil)},
+	{Name: "nodes", Description: "Every machine the mesh knows, with whether it is converged or adopted.",
+		Input: schema(nil, nil)},
+	{Name: "node", Description: "What one machine reported it can do, what it is assigned, and why.",
+		Input: schema(map[string]string{"node": "the machine's name"}, []string{"node"})},
+	{Name: "modules", Description: "Every module the mesh holds: version, the commit it was built from, " +
+		"and which machines run it.",
+		Input: schema(nil, nil)},
+	{Name: "seats", Description: "Every seat the mesh defines, what it delivers, and who holds it.",
+		Input: schema(nil, nil)},
+	{Name: "builds", Description: "What has been built lately and what came of it, for every module or for one; " +
+		"or, given a build's id, everything the build machine said while building it, line by line, from the bus.",
+		Input: schema(map[string]string{
+			"module": "one module's name; every module when absent",
+			"log":    "a build's id (as `builds` lists it): print what the build machine said, line by line",
+		}, nil)},
+	{Name: "plan", Description: "What one machine would run, and why: the declaration the mesh would send it.",
+		Input: schema(map[string]string{"node": "the machine's name"}, []string{"node"})},
+	{Name: "assign", Description: "Put a module on a machine. Refused with the mesh's own words when it cannot resolve there.",
+		Input: schema(map[string]string{"node": "the machine's name", "module": "the module's name"}, []string{"node", "module"})},
+	{Name: "unassign", Description: "Take a module off a machine.",
+		Input: schema(map[string]string{"node": "the machine's name", "module": "the module's name"}, []string{"node", "module"})},
+	{Name: "push", Description: "Send a machine everything it should be — or every machine that is behind, when no machine is named.",
+		Input: schema(map[string]string{"node": "the machine's name; every machine behind when absent"}, nil)},
+	{Name: "rotate", Description: "Replace a credential. A pair credential, by provision (and a consuming machine, " +
+		"else every holder): both ends are re-sent together. Or a module's own secret, by machine, module and " +
+		"name: made anew and the machine sent, so the module starts again on it — only for a secret its " +
+		"definition says it reads at start; a value given to the mesh, or one the module applies to a backend, is refused with the reason.",
+		Input: schema(map[string]string{
+			"provision": "a pair credential: the provision whose credential to replace",
+			"consumer":  "with provision: only the holder on this machine (optional)",
+			"node":      "an own secret: the machine",
+			"module":    "an own secret: the module",
+			"secret":    "an own secret: its name in the module's definition",
+		}, nil)},
+	{Name: "build", Description: "Have the build machine build a repository. Answers at once with the build's id: " +
+		"`builds` with that id follows it line by line, and the module is registered when the outcome comes.",
+		Input: schema(map[string]string{
+			"on":         "instead of a repository: a module whose artifacts others stand on; every module built on it is rebuilt (the rebuild a changed base needs)",
+			"behind":     "instead of a repository: \"yes\" rebuilds every module the mesh holds older than its source has",
+			"repository": "the repository's URL, or its path on the forge holding the git seat (owner/name)",
+			"path":       "the module's directory inside it (optional)",
+			"ref":        "the branch, tag or commit to build (optional)",
+		}, nil)},
+}
+
+// schema is a JSON schema for an object of string properties, which is every argument the verbs
+// above take. Kept small on purpose: a schema an agent cannot read is a tool it cannot call.
+func schema(properties map[string]string, required []string) map[string]any {
+	props := map[string]any{}
+	for name, description := range properties {
+		props[name] = map[string]any{"type": "string", "description": description}
+	}
+	out := map[string]any{"type": "object", "properties": props}
+	if len(required) > 0 {
+		out["required"] = required
+	}
+	return out
+}
+
+// unservedVerbs is what a seat promises and a claimant's `tools` does not answer.
+func unservedVerbs(tools []string, promised []Verb) []string {
+	has := map[string]bool{}
+	for _, t := range tools {
+		has[t] = true
+	}
+	var missing []string
+	for _, v := range promised {
+		if !has[v.Name] {
+			missing = append(missing, v.Name)
+		}
+	}
+	return missing
+}

internal/catalogue/verbs_test.go

@@ -0,0 +1,72 @@
+package catalogue
+
+import (
+	"strings"
+	"testing"
+)
+
+// A served verb is written as a bare name or in full, and both read into one type (novox/hq ADR 0132).
+func TestAServedVerbIsANameOrADefinition(t *testing.T) {
+	m, err := ParseManifest([]byte(`{"module":"till","version":"1","tools":["price","refund"],` +
+		`"seats":[{"name":"shop-till","serves":["price",{"name":"refund","description":"give it back",` +
+		`"input":{"type":"object","properties":{"order":{"type":"string"}}}}]}],` +
+		`"claims":[{"name":"shop-till","scope":"mesh"}]}`))
+	if err != nil {
+		t.Fatal(err)
+	}
+	got := m.DefinesSeats[0].Serves
+	if len(got) != 2 || got[0].Name != "price" || got[1].Name != "refund" || got[1].Description != "give it back" {
+		t.Fatalf("verbs not read: %+v", got)
+	}
+	if got[1].Input["type"] != "object" {
+		t.Fatalf("the schema did not travel with the verb: %+v", got[1].Input)
+	}
+}
+
+// A misspelt key inside a verb's definition is refused, like one anywhere else in the manifest.
+func TestAVerbWithAnUnknownKeyIsRefused(t *testing.T) {
+	_, err := ParseManifest([]byte(`{"module":"till","version":"1",` +
+		`"seats":[{"name":"shop-till","serves":[{"name":"price","descripton":"typo"}]}]}`))
+	if err == nil || !strings.Contains(err.Error(), "descripton") {
+		t.Fatalf("a verb with a misspelt key was accepted: %v", err)
+	}
+}
+
+// Holding a mesh seat that serves verbs requires serving them, and the refusal names the verbs.
+func TestHoldingAMeshSeatRequiresServingItsVerbs(t *testing.T) {
+	was := Seats()
+	t.Cleanup(func() { UseSeats(was) })
+	UseSeats([]Seat{{Name: "mesh-controller", Scope: ScopeMesh, Decision: "test",
+		Serves: []Verb{{Name: "status"}, {Name: "push"}}}})
+	seat, _ := SeatNamed("mesh-controller")
+
+	partial := Manifest{Module: "a-controller", Tools: []string{"status"},
+		Claims: []Claim{{Name: "mesh-controller", Scope: ScopeMesh}}}
+	err := CanHold(partial, seat)
+	if err == nil || !strings.Contains(err.Error(), "does not serve push") {
+		t.Fatalf("a holder missing a verb was not refused by name: %v", err)
+	}
+	whole := Manifest{Module: "a-controller", Tools: []string{"status", "push"},
+		Claims: []Claim{{Name: "mesh-controller", Scope: ScopeMesh}}}
+	if err := CanHold(whole, seat); err != nil {
+		t.Fatalf("a holder serving every verb was refused: %v", err)
+	}
+}
+
+// The mesh's own verbs are declared in full: an agent cannot call a name without a schema.
+func TestEveryControllerVerbIsDescribedWithASchema(t *testing.T) {
+	seen := map[string]bool{}
+	for _, v := range ControllerVerbs {
+		if v.Description == "" || v.Input == nil || v.Input["type"] != "object" {
+			t.Errorf("%s: no description or no object schema", v.Name)
+		}
+		if seen[v.Name] {
+			t.Errorf("%s declared twice", v.Name)
+		}
+		seen[v.Name] = true
+	}
+	seat, _ := SeatNamed(ControllerSeatName)
+	if len(seat.Serves) != len(ControllerVerbs) {
+		t.Fatalf("the compiled mesh-controller seat serves %d verbs, the table has %d", len(seat.Serves), len(ControllerVerbs))
+	}
+}

internal/inventory/busrecords.go

@@ -137,7 +137,8 @@ func declaredFor(m catalogue.Manifest, seats map[string]catalogue.SeatDeclaratio
 }
 
 func asSeat(s catalogue.SeatDeclaration) broker.Seat {
-	return broker.Seat{Name: s.Name, Accepts: s.Accepts, Emits: s.Emits, Serves: s.Serves}
+	return broker.Seat{Name: s.Name, Scope: s.Scope, Accepts: s.Accepts, Emits: s.Emits,
+		Serves: catalogue.VerbNames(s.Serves)}
 }
 
 // MeshSeats are the mesh's own seats that carry a protocol, as the bus needs them: what to make a work
@@ -146,7 +147,7 @@ func MeshSeats() []broker.DeclaredSeat {
 	var out []broker.DeclaredSeat
 	for _, s := range catalogue.SeatsWithAProtocol() {
 		out = append(out, broker.DeclaredSeat{
-			Name: s.Name, Accepts: s.Accepts, Emits: s.Emits, Serves: s.Serves,
+			Name: s.Name, Accepts: s.Accepts, Emits: s.Emits, Serves: catalogue.VerbNames(s.Serves),
 		})
 	}
 	return out

internal/inventory/forget_test.go

@@ -32,7 +32,7 @@ func TestRegisteringAModuleAgainKeepsWhatTheMeshHoldsForIt(t *testing.T) {
 		t.Fatal(err)
 	}
 	m := catalogue.Manifest{Module: "step-ca", Version: "1",
-		Provides: catalogue.Offers("acme-ca"), OwnSecrets: map[string]string{"password": "/run/password"}}
+		Provides: catalogue.Offers("acme-ca"), OwnSecrets: catalogue.OwnSecrets{"password": {Path: "/run/password"}}}
 	if err := inv.RegisterModule(ctx, m, Source{}); err != nil {
 		t.Fatal(err)
 	}
@@ -228,6 +228,6 @@ func TestAModuleStillAssignedRefusesBeforeAnythingAboutWhatItHolds(t *testing.T)
 // withOwnSecret gives a fixture manifest an own secret, so a delivery to it is one the module
 // declares (novox/hq 04-ISSUES/078).
 func withOwnSecret(m catalogue.Manifest, name string) catalogue.Manifest {
-	m.OwnSecrets = map[string]string{name: "/run/" + name}
+	m.OwnSecrets = catalogue.OwnSecrets{name: {Path: "/run/" + name}}
 	return m
 }

internal/inventory/migrations/0047-a-seat-carries-its-tools.sql

@@ -0,0 +1,12 @@
+-- A seat's protocol lives in the store, not in the binary (novox/hq ADR 0129, ADR 0132, design 33 §2).
+--
+-- ADR 0122 moved the seat set into this table with name, scope, delivers and decision, and the
+-- protocol — what a role accepts, emits and serves — stayed compiled into the control plane and was
+-- merged in as a row was read. Discovery that reads a binary disagrees with the mesh the moment the
+-- two are on different versions, and a tool without a schema is not something an agent can call. So
+-- the three halves become columns: accepts and emits as lists of verbs, serves as the verbs in full
+-- ({name, description, input, output}). Seeded from the compiled defaults where a row has none,
+-- additively thereafter (a verb a release adds joins the row; nothing is taken away).
+alter table seat add column accepts jsonb not null default '[]'::jsonb;
+alter table seat add column emits   jsonb not null default '[]'::jsonb;
+alter table seat add column serves  jsonb not null default '[]'::jsonb;

internal/inventory/migrations/0048-the-artifact-store-seat-is-named-for-its-scope.sql

@@ -0,0 +1,25 @@
+-- The artifact store's seat is named for its scope, like the mesh's other seats (novox/hq ADR 0121,
+-- ADR 0156, issue 123).
+--
+-- `the-artifact-store` was the last of the mesh's own seats named for the job it happened to do rather
+-- than for the mesh; ADR 0121 decided the rename and deferred it because a delivering seat that stops
+-- resolving mid-flight takes a provision away from every consumer. ADR 0122 removed that risk: a seat's
+-- former name is an alias that resolves to it forever, a held record follows the rename by cascade, and
+-- a claim written with the old name still holds.
+--
+-- **Both rows may exist when this runs.** A controller whose compiled defaults already carry the new
+-- name seeds it as a new seat the moment it can, and on the mesh this was written for that happened
+-- before the rename: the first form of this migration renamed into a duplicate key and the control
+-- node's prepare failed on every attempt (2026-09-30). So: if the new row is already there, the old
+-- row's holding moves to it and the old row goes; otherwise the old row is renamed. Either way the old
+-- name becomes an alias.
+update seat_holding set seat = 'mesh-artifact-store'
+  where seat = 'the-artifact-store'
+    and exists (select 1 from seat where name = 'mesh-artifact-store');
+delete from seat
+  where name = 'the-artifact-store'
+    and exists (select 1 from seat where name = 'mesh-artifact-store');
+update seat set name = 'mesh-artifact-store' where name = 'the-artifact-store';
+insert into seat_alias (alias, seat) values ('the-artifact-store', 'mesh-artifact-store')
+  on conflict (alias) do update set seat = excluded.seat;
+update seat_alias set seat = 'mesh-artifact-store' where seat = 'the-artifact-store';

internal/inventory/migrations/0049-a-shared-credential-is-one-value-sealed-many-times.sql

@@ -0,0 +1,8 @@
+-- A provider with one credential shares it with every consumer (novox/hq ADR 0158).
+--
+-- The provider's own secret and every consumer's pair row then carry one value, sealed once per
+-- holder. The mesh keeps no plaintext, so it cannot tell by reading that they agree; it stamps the
+-- act that made them instead. A pair row whose stamp is the own secret's was sealed from the same
+-- value; one whose stamp differs, or is missing, is remade for every holder at once.
+alter table module_secret add column generation text;
+alter table secret add column generation text;

internal/inventory/operator_test.go

@@ -14,7 +14,7 @@ import (
 func TestAnOwnSecretIsSealedToTheOperatorToo(t *testing.T) {
 	inv, ctx := twoNodesWithKeys(t)
 	if err := inv.RegisterModule(ctx, catalogue.Manifest{Module: "postgres", Version: "1",
-		OwnSecrets: map[string]string{"superuser": "/run/superuser", "replication": "/run/replication"}}, Source{}); err != nil {
+		OwnSecrets: catalogue.OwnSecrets{"superuser": {Path: "/run/superuser"}, "replication": {Path: "/run/replication"}}}, Source{}); err != nil {
 		t.Fatal(err)
 	}
 

internal/inventory/seats.go

@@ -2,6 +2,7 @@ package inventory
 
 import (
 	"context"
+	"encoding/json"
 	"fmt"
 
 	"github.com/novox/mesh-controller/internal/catalogue"
@@ -17,7 +18,7 @@ import (
 // Seats is every seat the mesh defines, read from the store.
 func (i *Inventory) Seats(ctx context.Context) ([]catalogue.Seat, error) {
 	rows, err := i.store.Pool().Query(ctx,
-		`select name, scope, delivers, decided from seat order by name`)
+		`select name, scope, delivers, decided, accepts, emits, serves from seat order by name`)
 	if err != nil {
 		return nil, err
 	}
@@ -26,9 +27,21 @@ func (i *Inventory) Seats(ctx context.Context) ([]catalogue.Seat, error) {
 	var seats []catalogue.Seat
 	for rows.Next() {
 		var s catalogue.Seat
-		if err := rows.Scan(&s.Name, &s.Scope, &s.Delivers, &s.Decision); err != nil {
+		var accepts, emits, serves []byte
+		if err := rows.Scan(&s.Name, &s.Scope, &s.Delivers, &s.Decision, &accepts, &emits, &serves); err != nil {
 			return nil, err
 		}
+		// The protocol, from the row (novox/hq ADR 0132). A row that predates the columns has empty
+		// lists, and UseSeats keeps the compiled protocol for it until the next seeding fills them.
+		if err := json.Unmarshal(accepts, &s.Accepts); err != nil {
+			return nil, fmt.Errorf("seat %s: accepts: %w", s.Name, err)
+		}
+		if err := json.Unmarshal(emits, &s.Emits); err != nil {
+			return nil, fmt.Errorf("seat %s: emits: %w", s.Name, err)
+		}
+		if err := json.Unmarshal(serves, &s.Serves); err != nil {
+			return nil, fmt.Errorf("seat %s: serves: %w", s.Name, err)
+		}
 		seats = append(seats, s)
 	}
 	return seats, rows.Err()
@@ -41,21 +54,116 @@ func (i *Inventory) Seats(ctx context.Context) ([]catalogue.Seat, error) {
 // exactly as it is, so an operator's rename in the table is not undone by the next deploy putting
 // the old name back. What a release removes from the defaults is not deleted here either; retiring a
 // seat is its own decision, not a silent consequence of it dropping out of the binary.
+//
+// **The protocol is seeded additively** (novox/hq ADR 0132, design 33 §7). A row that has none takes
+// the compiled protocol whole — that is the compiled fallback becoming data, once. A row that has one
+// gains any verb the defaults name and it lacks, and loses nothing: a seat's tools are an interface,
+// additive within a version, and a verb an operator added to the row is theirs to keep.
 func (i *Inventory) SeedSeats(ctx context.Context, defaults []catalogue.Seat) (int, error) {
 	var added int
 	for _, s := range defaults {
-		tag, err := i.store.Pool().Exec(ctx,
+		accepts, emits, serves, err := protocolJSON(s)
-			`insert into seat (name, scope, delivers, decided) values ($1, $2, $3, $4)
-			 on conflict (name) do nothing`,
-			s.Name, s.Scope, s.Delivers, s.Decision)
 		if err != nil {
 			return added, err
 		}
-		added += int(tag.RowsAffected())
+		tag, err := i.store.Pool().Exec(ctx,
+			`insert into seat (name, scope, delivers, decided, accepts, emits, serves)
+			 values ($1, $2, $3, $4, $5, $6, $7)
+			 on conflict (name) do nothing`,
+			s.Name, s.Scope, s.Delivers, s.Decision, accepts, emits, serves)
+		if err != nil {
+			return added, err
+		}
+		if n := int(tag.RowsAffected()); n > 0 {
+			added += n
+			continue
+		}
+		if err := i.widenProtocol(ctx, s); err != nil {
+			return added, err
+		}
 	}
 	return added, nil
 }
 
+// widenProtocol adds to a seat's row whatever the defaults name and the row lacks, by verb name.
+func (i *Inventory) widenProtocol(ctx context.Context, s catalogue.Seat) error {
+	var accepts, emits, serves []byte
+	if err := i.store.Pool().QueryRow(ctx,
+		`select accepts, emits, serves from seat where name = $1`, s.Name).Scan(&accepts, &emits, &serves); err != nil {
+		return err
+	}
+	var row catalogue.Seat
+	if err := json.Unmarshal(accepts, &row.Accepts); err != nil {
+		return err
+	}
+	if err := json.Unmarshal(emits, &row.Emits); err != nil {
+		return err
+	}
+	if err := json.Unmarshal(serves, &row.Serves); err != nil {
+		return err
+	}
+	changed := false
+	row.Accepts, changed = union(row.Accepts, s.Accepts, changed)
+	row.Emits, changed = union(row.Emits, s.Emits, changed)
+	have := map[string]bool{}
+	for _, v := range row.Serves {
+		have[v.Name] = true
+	}
+	for _, v := range s.Serves {
+		if !have[v.Name] {
+			row.Serves = append(row.Serves, v)
+			changed = true
+		}
+	}
+	if !changed {
+		return nil
+	}
+	a, e, sv, err := protocolJSON(row)
+	if err != nil {
+		return err
+	}
+	_, err = i.store.Pool().Exec(ctx,
+		`update seat set accepts = $2, emits = $3, serves = $4 where name = $1`, s.Name, a, e, sv)
+	return err
+}
+
+func union(have, want []string, changed bool) ([]string, bool) {
+	seen := map[string]bool{}
+	for _, h := range have {
+		seen[h] = true
+	}
+	for _, w := range want {
+		if !seen[w] {
+			have = append(have, w)
+			seen[w] = true
+			changed = true
+		}
+	}
+	return have, changed
+}
+
+func protocolJSON(s catalogue.Seat) (accepts, emits, serves []byte, err error) {
+	if accepts, err = json.Marshal(orEmpty(s.Accepts)); err != nil {
+		return
+	}
+	if emits, err = json.Marshal(orEmpty(s.Emits)); err != nil {
+		return
+	}
+	verbs := s.Serves
+	if verbs == nil {
+		verbs = []catalogue.Verb{}
+	}
+	serves, err = json.Marshal(verbs)
+	return
+}
+
+func orEmpty(s []string) []string {
+	if s == nil {
+		return []string{}
+	}
+	return s
+}
+
 // Aliases is every former seat name and the seat it now resolves to (novox/hq ADR 0122).
 func (i *Inventory) Aliases(ctx context.Context) (map[string]string, error) {
 	rows, err := i.store.Pool().Query(ctx, `select alias, seat from seat_alias`)

internal/inventory/secrets.go

@@ -505,7 +505,7 @@ func declaresOwn(m catalogue.Manifest) string {
 	if len(m.OwnSecrets) == 0 {
 		return "it declares no own secrets"
 	}
-	return "it declares: " + strings.Join(sortedNames(m.OwnSecrets), ", ")
+	return "it declares: " + strings.Join(sortedNames(m.OwnSecrets.Paths()), ", ")
 }
 
 func sortedNames(of map[string]string) []string {
@@ -523,3 +523,300 @@ func orNone(names []string) string {
 	}
 	return strings.Join(names, ", ")
 }
+
+// ErrNotRotatable says why the mesh will not rotate a module's own secret; the words are the caller's
+// to print, and the remedy is in them.
+type ErrNotRotatable struct{ Why string }
+
+func (e ErrNotRotatable) Error() string { return e.Why }
+
+// RotateModuleSecret makes a module's own secret anew, the way the first mint did (novox/hq
+// ADR 0114, issue 180). The caller sends the node, so the module is started again on the new value.
+//
+// **Only a secret the module reads when it starts.** A secret the module's code applies to a
+// backend that takes it once would, rotated this way, leave the backend on the old value and the
+// module reading the new one — the fault issue 179 was. That form is staged, which the mesh does
+// not build yet, and is refused by name. A secret whose manifest says neither is refused with the
+// word to write; a secret given to the mesh rather than made by it is refused as 0113 says: the
+// mesh will not replace what it cannot read.
+func (i *Inventory) RotateModuleSecret(ctx context.Context, node, module, name string) error {
+	m, err := i.declared(ctx, module)
+	if err != nil {
+		return err
+	}
+	own, declared := m.OwnSecrets[name]
+	if !declared {
+		return fmt.Errorf("%s does not declare %q as an own secret; %s", module, name, declaresOwn(m))
+	}
+	switch own.Taken {
+	case catalogue.TakenAtStart:
+	case catalogue.TakenApplied:
+		return ErrNotRotatable{Why: fmt.Sprintf(
+			"%s applies %q to a backend that takes it once, so a rotation must be staged beside the "+
+				"current value until the module confirms it — the mesh does not do that yet (ADR 0114). "+
+				"Changing it is a person's work: change it in %s, then `secret accept %s %s %s`",
+			module, name, module, node, module, name)}
+	default:
+		return ErrNotRotatable{Why: fmt.Sprintf(
+			"%s does not say how it takes %q, so the mesh will not rotate it: a secret rotated under "+
+				"software that never reads it again is worse than one left alone. Its definition says "+
+				"\"own-secrets\": {%q: {\"path\": …, \"taken\": \"at-start\"}} when the module reads it as it "+
+				"starts, or \"applied\" when its own code applies it",
+			module, name, name)}
+	}
+	record, err := i.NodeByName(ctx, node)
+	if err != nil {
+		return err
+	}
+	key, err := i.SealingKeyOf(ctx, node)
+	if err != nil {
+		return err
+	}
+	if key == "" {
+		return fmt.Errorf("%s has no sealing key, so nothing can be sealed to it", node)
+	}
+	var origin string
+	err = i.store.Pool().QueryRow(ctx,
+		`select origin from module_secret where node = $1 and module = $2 and name = $3`,
+		record.ID, module, name).Scan(&origin)
+	if errors.Is(err, pgx.ErrNoRows) {
+		return fmt.Errorf("%s on %s holds no %q yet; the first push makes it", module, node, name)
+	}
+	if err != nil {
+		return err
+	}
+	if origin == OriginAccepted {
+		return ErrNotRotatable{Why: fmt.Sprintf(
+			"%s on %s holds %q as a value given to the mesh, not made by it, and the mesh will not "+
+				"replace what it cannot read (ADR 0113). Change it where it lives, then `secret accept "+
+				"%s %s %s` with the new value",
+			module, node, name, node, module, name)}
+	}
+	if len(m.ProvisionsSharing(name)) > 0 {
+		// Shared with every consumer of those provisions (ADR 0158): one new value, sealed to all.
+		return i.remakeShared(ctx, record.ID, key, module, name, "", nil, "", "", "")
+	}
+	operator, err := i.OperatorKey(ctx)
+	if err != nil {
+		return err
+	}
+	made, blob, err := secrets.MakeWithOperator(key, key, operator)
+	if err != nil {
+		return err
+	}
+	forOperator, operatorKey := operatorColumns(operator, blob)
+	_, err = i.store.Pool().Exec(ctx,
+		`update module_secret set sealed = $4, node_key = $5, origin = 'made', made_at = now(),
+		        operator_sealed = $6, operator_key = $7
+		  where node = $1 and module = $2 and name = $3`,
+		record.ID, module, name, made.ForConsumer, key, forOperator, operatorKey)
+	return err
+}
+
+// SharedSecretFor is a consumer's copy of a provider's one credential (novox/hq ADR 0158): the
+// provider's own secret, sealed to this consumer as a pair credential would be.
+//
+// **One value, many seals, made in one act.** The mesh keeps no plaintext, so a value cannot be
+// sealed to a consumer that binds later; when a consumer's copy is missing or was made in a
+// different act than the provider's own secret, a fresh value is made and sealed to the provider,
+// to every consumer that holds the provision from this provider, to this consumer and to the
+// operator — one generation, stamped on every row. Every holding machine must then be sent, which
+// the plan's caller does by sending the node it was composing and `secret rotate` does for all.
+//
+// An accepted value is sealed to the consumers of the moment it was accepted and never remade: a
+// consumer that binds later is refused with the way out, as ADR 0113 says.
+func (i *Inventory) SharedSecretFor(ctx context.Context, provision, consumer, consumerModule,
+	provider, providerModule, local, own string) (Secret, error) {
+	consumerKey, err := i.SealingKeyOf(ctx, consumer)
+	if err != nil {
+		return Secret{}, err
+	}
+	consumerNode, err := i.NodeByName(ctx, consumer)
+	if err != nil {
+		return Secret{}, err
+	}
+	providerNode, err := i.NodeByName(ctx, provider)
+	if err != nil {
+		return Secret{}, err
+	}
+	providerKey, err := i.SealingKeyOf(ctx, provider)
+	if err != nil {
+		return Secret{}, err
+	}
+	if consumerKey == "" || providerKey == "" {
+		return Secret{}, fmt.Errorf("%s and %s both need a sealing key before %s can be shared", consumer, provider, provision)
+	}
+
+	var ownGeneration, ownOrigin, ownKey *string
+	err = i.store.Pool().QueryRow(ctx,
+		`select generation, origin, node_key from module_secret where node = $1 and module = $2 and name = $3`,
+		providerNode.ID, providerModule, own).Scan(&ownGeneration, &ownOrigin, &ownKey)
+	if err != nil && !errors.Is(err, pgx.ErrNoRows) {
+		return Secret{}, err
+	}
+	var held Secret
+	var pairGeneration *string
+	err = i.store.Pool().QueryRow(ctx,
+		`select for_consumer, for_provider, consumer_key, provider_key, origin, generation from secret
+		 where name = $1 and consumer = $2 and consumer_module = $3 and provider = $4 and local = $5`,
+		provision, consumerNode.ID, consumerModule, providerNode.ID, local).
+		Scan(&held.ForConsumer, &held.ForProvider, &held.ConsumerKey, &held.ProviderKey, &held.Origin, &pairGeneration)
+	if err != nil && !errors.Is(err, pgx.ErrNoRows) {
+		return Secret{}, err
+	}
+	current := ownGeneration != nil && pairGeneration != nil && *ownGeneration == *pairGeneration &&
+		held.ConsumerKey == consumerKey && held.ProviderKey == providerKey && ownKey != nil && *ownKey == providerKey
+	if current {
+		held.Name, held.Consumer, held.Provider = provision, consumer, provider
+		held.ConsumerModule, held.Local = consumerModule, local
+		return held, nil
+	}
+	if ownOrigin != nil && *ownOrigin == OriginAccepted {
+		return Secret{}, fmt.Errorf(
+			"%s on %s needs %s from %s, whose credential is %s's own secret %q — a value given to the "+
+				"mesh, which cannot seal it to a consumer that binds later (ADR 0158): `secret accept %s %s %s` "+
+				"again, which seals it to every current consumer",
+			consumerModule, consumer, provision, provider, providerModule, own, provider, providerModule, own)
+	}
+	if err := i.remakeShared(ctx, providerNode.ID, providerKey, providerModule, own, provision, consumerNode.ID, consumerKey, consumerModule, local); err != nil {
+		return Secret{}, err
+	}
+	return i.SharedSecretFor(ctx, provision, consumer, consumerModule, provider, providerModule, local, own)
+}
+
+// remakeShared makes one fresh value and seals it to the provider's own secret, to every pair row
+// of the provisions sharing it, to the one consumer being added (when there is one), and to the
+// operator, all under one generation.
+func (i *Inventory) remakeShared(ctx context.Context, providerID any, providerKey, providerModule, own,
+	provision string, addConsumerID any, addConsumerKey, addConsumerModule, addLocal string) error {
+	m, err := i.declared(ctx, providerModule)
+	if err != nil {
+		return err
+	}
+	provisions := m.ProvisionsSharing(own)
+	if len(provisions) == 0 {
+		return fmt.Errorf("%s names no provision whose credential is its own secret %q", providerModule, own)
+	}
+	operator, err := i.OperatorKey(ctx)
+	if err != nil {
+		return err
+	}
+	value := secrets.Fresh()
+	generation := secrets.Stamp()
+	ownSealed, err := secrets.Seal(providerKey, []byte(value))
+	if err != nil {
+		return err
+	}
+	forOperator, operatorKey := "", ""
+	if operator != "" {
+		if forOperator, err = secrets.Seal(operator, []byte(value)); err != nil {
+			return err
+		}
+		operatorKey = operator
+	}
+	tx, err := i.store.Pool().Begin(ctx)
+	if err != nil {
+		return err
+	}
+	defer func() { _ = tx.Rollback(ctx) }()
+	if _, err := tx.Exec(ctx,
+		`insert into module_secret (node, module, name, sealed, node_key, origin, operator_sealed, operator_key, generation)
+		 values ($1, $2, $3, $4, $5, 'made', nullif($6,''), nullif($7,''), $8)
+		 on conflict (node, module, name) do update set
+		   sealed = excluded.sealed, node_key = excluded.node_key, origin = 'made', made_at = now(),
+		   operator_sealed = excluded.operator_sealed, operator_key = excluded.operator_key,
+		   generation = excluded.generation`,
+		providerID, providerModule, own, ownSealed, providerKey, forOperator, operatorKey, generation); err != nil {
+		return err
+	}
+	// Every consumer that already holds one of the sharing provisions from this provider.
+	rows, err := tx.Query(ctx,
+		`select s.consumer, s.consumer_module, s.local, s.name, n.sealing_key
+		   from secret s join node n on n.id = s.consumer
+		  where s.provider = $1 and s.name = any($2)`, providerID, provisions)
+	if err != nil {
+		return err
+	}
+	type holder struct {
+		consumer                         any
+		consumerModule, local, name, key string
+	}
+	var holders []holder
+	for rows.Next() {
+		var h holder
+		var key *string
+		if err := rows.Scan(&h.consumer, &h.consumerModule, &h.local, &h.name, &key); err != nil {
+			rows.Close()
+			return err
+		}
+		if key != nil {
+			h.key = *key
+		}
+		holders = append(holders, h)
+	}
+	rows.Close()
+	if addConsumerID != nil {
+		holders = append(holders, holder{consumer: addConsumerID, consumerModule: addConsumerModule,
+			local: addLocal, name: provision, key: addConsumerKey})
+	}
+	for _, h := range holders {
+		if h.key == "" {
+			continue // a consumer whose key is gone cannot be sealed to; it is remade when it reports one
+		}
+		sealed, err := secrets.Accept(value, h.key, providerKey)
+		if err != nil {
+			return err
+		}
+		if _, err := tx.Exec(ctx,
+			`insert into secret (name, consumer, consumer_module, provider, for_consumer, for_provider,
+			                     consumer_key, provider_key, origin, local, generation)
+			 values ($1, $2, $3, $4, $5, $6, $7, $8, 'made', $9, $10)
+			 on conflict (name, local, consumer, consumer_module, provider) do update set
+			   for_consumer = excluded.for_consumer, for_provider = excluded.for_provider,
+			   consumer_key = excluded.consumer_key, provider_key = excluded.provider_key,
+			   origin = 'made', generation = excluded.generation`,
+			h.name, h.consumer, h.consumerModule, providerID, sealed.ForConsumer, sealed.ForProvider,
+			h.key, providerKey, h.local, generation); err != nil {
+			return err
+		}
+	}
+	return tx.Commit(ctx)
+}
+
+// SharedHolders is every machine holding a copy of a provider's shared credential: the provider's
+// and every consumer's, for the send that follows a rotation.
+func (i *Inventory) SharedHolders(ctx context.Context, provider, providerModule, own string) ([]string, error) {
+	m, err := i.declared(ctx, providerModule)
+	if err != nil {
+		return nil, err
+	}
+	provisions := m.ProvisionsSharing(own)
+	if len(provisions) == 0 {
+		return nil, nil
+	}
+	providerNode, err := i.NodeByName(ctx, provider)
+	if err != nil {
+		return nil, err
+	}
+	rows, err := i.store.Pool().Query(ctx,
+		`select distinct n.name from secret s join node n on n.id = s.consumer
+		  where s.provider = $1 and s.name = any($2)`, providerNode.ID, provisions)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	seen := map[string]bool{provider: true}
+	out := []string{provider}
+	for rows.Next() {
+		var name string
+		if err := rows.Scan(&name); err != nil {
+			return nil, err
+		}
+		if !seen[name] {
+			seen[name] = true
+			out = append(out, name)
+		}
+	}
+	sort.Strings(out)
+	return out, nil
+}

internal/inventory/secrets_test.go

@@ -5,8 +5,10 @@ import (
 	"crypto/ecdh"
 	"crypto/rand"
 	"encoding/base64"
+	"errors"
 	"github.com/novox/mesh-controller/internal/catalogue"
 	"github.com/novox/mesh-controller/internal/secrets"
+	"reflect"
 	"strings"
 	"testing"
 
@@ -408,7 +410,7 @@ func TestACredentialGoesWhenEitherMachineDoes(t *testing.T) {
 func TestASecretTheMeshWasGivenIsNotReinventedWhenTheMachineRejoins(t *testing.T) {
 	inv, ctx := twoNodesWithKeys(t)
 	if err := inv.RegisterModule(ctx, catalogue.Manifest{Module: "builder", Version: "1",
-		OwnSecrets: map[string]string{"broker": "/run/broker"}}, Source{}); err != nil {
+		OwnSecrets: catalogue.OwnSecrets{"broker": {Path: "/run/broker"}}}, Source{}); err != nil {
 		t.Fatal(err)
 	}
 	const url = "amqps://builder:the-password-the-broker-was-told@broker/"
@@ -440,7 +442,7 @@ func TestASecretTheMeshWasGivenIsNotReinventedWhenTheMachineRejoins(t *testing.T
 func TestASecretTheMeshWasGivenSurvivesAnOrdinaryPush(t *testing.T) {
 	inv, ctx := twoNodesWithKeys(t)
 	if err := inv.RegisterModule(ctx, catalogue.Manifest{Module: "builder", Version: "1",
-		OwnSecrets: map[string]string{"broker": "/run/broker"}}, Source{}); err != nil {
+		OwnSecrets: catalogue.OwnSecrets{"broker": {Path: "/run/broker"}}}, Source{}); err != nil {
 		t.Fatal(err)
 	}
 	if err := inv.AcceptSecretForModule(ctx, "consumer", "builder", "broker",
@@ -725,7 +727,7 @@ func TestTheOperatorRecoversEachLocalNameApart(t *testing.T) {
 func TestADeliveredSecretIsRefusedUnderANameTheModuleDoesNotDeclare(t *testing.T) {
 	inv, ctx := twoNodesWithKeys(t)
 	if err := inv.RegisterModule(ctx, catalogue.Manifest{Module: "step-ca", Version: "1",
-		OwnSecrets: map[string]string{"password": "/run/password"}}, Source{}); err != nil {
+		OwnSecrets: catalogue.OwnSecrets{"password": {Path: "/run/password"}}}, Source{}); err != nil {
 		t.Fatal(err)
 	}
 	err := inv.AcceptSecretForModule(ctx, "consumer", "step-ca", "root-key", "not-a-key")
@@ -785,3 +787,150 @@ func TestADeliveredPairCredentialIsRefusedForARequirementTheModuleDoesNotHave(t
 		t.Errorf("a delivery under a kept local was refused: %v", err)
 	}
 }
+
+// A module's own secret rotates when its definition says the module reads it at start: made anew,
+// sealed to the machine and the operator, origin made. Refused with the reason when the definition
+// says nothing, says the module applies it, or when the value was given to the mesh (novox/hq
+// ADR 0114, issue 180).
+func TestAnOwnSecretRotatesOnlyWhenTheModuleReadsItAtStart(t *testing.T) {
+	inv, ctx := twoNodesWithKeys(t)
+	m := catalogue.Manifest{Module: "idp", Version: "1", OwnSecrets: catalogue.OwnSecrets{
+		"session": {Path: "/var/lib/idp/session.secret", Taken: catalogue.TakenAtStart},
+		"admin":   {Path: "/var/lib/idp/admin.secret", Taken: catalogue.TakenApplied},
+		"broker":  {Path: "/var/lib/mesh/idp/broker"},
+	}}
+	if err := inv.RegisterModule(ctx, m, Source{}); err != nil {
+		t.Fatal(err)
+	}
+	before, err := inv.SecretForModule(ctx, "consumer", "idp", "session")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if err := inv.RotateModuleSecret(ctx, "consumer", "idp", "session"); err != nil {
+		t.Fatal(err)
+	}
+	after, err := inv.SecretForModule(ctx, "consumer", "idp", "session")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if after == before {
+		t.Fatal("rotating made no new value")
+	}
+
+	if _, err := inv.SecretForModule(ctx, "consumer", "idp", "admin"); err != nil {
+		t.Fatal(err)
+	}
+	var refused ErrNotRotatable
+	err = inv.RotateModuleSecret(ctx, "consumer", "idp", "admin")
+	if !errors.As(err, &refused) || !strings.Contains(err.Error(), "staged") {
+		t.Fatalf("an applied secret must be refused as not yet stageable: %v", err)
+	}
+	if _, err := inv.SecretForModule(ctx, "consumer", "idp", "broker"); err != nil {
+		t.Fatal(err)
+	}
+	err = inv.RotateModuleSecret(ctx, "consumer", "idp", "broker")
+	if !errors.As(err, &refused) || !strings.Contains(err.Error(), "does not say how it takes") {
+		t.Fatalf("a secret that says nothing of how it is taken must be refused: %v", err)
+	}
+
+	if err := inv.AcceptSecretForModule(ctx, "consumer", "idp", "session", "the-real-one"); err != nil {
+		t.Fatal(err)
+	}
+	err = inv.RotateModuleSecret(ctx, "consumer", "idp", "session")
+	if !errors.As(err, &refused) || !strings.Contains(err.Error(), "given to the mesh") {
+		t.Fatalf("an accepted value must be refused: %v", err)
+	}
+	if err := inv.RotateModuleSecret(ctx, "consumer", "idp", "nothing"); err == nil || !strings.Contains(err.Error(), "does not declare") {
+		t.Fatalf("an undeclared secret: %v", err)
+	}
+}
+
+// A provider's one credential is one value sealed to every holder, remade for all at once when a
+// consumer binds or a rotation is asked (novox/hq ADR 0158).
+func TestASharedCredentialIsOneValueSealedToEveryHolder(t *testing.T) {
+	inv, ctx := twoNodesWithKeys(t)
+	provider := catalogue.Manifest{Module: "downloader", Version: "1",
+		Provides:   []catalogue.Offer{{Name: "downloader-api", Scope: catalogue.ScopeMesh, Credential: &catalogue.OfferCredential{Own: "password"}}},
+		OwnSecrets: catalogue.OwnSecrets{"password": {Path: "/var/lib/mesh/downloader/password", Taken: catalogue.TakenAtStart}}}
+	if err := inv.RegisterModule(ctx, provider, Source{}); err != nil {
+		t.Fatal(err)
+	}
+	for _, m := range []string{"manager", "indexer"} {
+		if err := inv.RegisterModule(ctx, catalogue.Manifest{Module: m, Version: "1", Requires: []string{"downloader-api"}}, Source{}); err != nil {
+			t.Fatal(err)
+		}
+	}
+	generationOf := func() string {
+		var g *string
+		node, _ := inv.NodeByName(ctx, "provider")
+		if err := inv.store.Pool().QueryRow(ctx, `select generation from module_secret where node = $1 and module = 'downloader' and name = 'password'`, node.ID).Scan(&g); err != nil {
+			t.Fatal(err)
+		}
+		if g == nil {
+			t.Fatal("the provider's own secret carries no generation")
+		}
+		return *g
+	}
+	pairGeneration := func(module string) string {
+		var g *string
+		cn, _ := inv.NodeByName(ctx, "consumer")
+		pn, _ := inv.NodeByName(ctx, "provider")
+		if err := inv.store.Pool().QueryRow(ctx, `select generation from secret where name = 'downloader-api' and consumer = $1 and consumer_module = $2 and provider = $3`, cn.ID, module, pn.ID).Scan(&g); err != nil {
+			t.Fatal(err)
+		}
+		if g == nil {
+			return ""
+		}
+		return *g
+	}
+
+	first, err := inv.SharedSecretFor(ctx, "downloader-api", "consumer", "manager", "provider", "downloader", "", "password")
+	if err != nil {
+		t.Fatal(err)
+	}
+	g1 := generationOf()
+	if pairGeneration("manager") != g1 {
+		t.Fatal("the consumer's copy was not sealed in the same act as the provider's own secret")
+	}
+	again, err := inv.SharedSecretFor(ctx, "downloader-api", "consumer", "manager", "provider", "downloader", "", "password")
+	if err != nil || again.ForConsumer != first.ForConsumer {
+		t.Fatalf("asking twice remade the value: %v", err)
+	}
+
+	// A second consumer binding remakes the value for everyone, in one generation.
+	if _, err := inv.SharedSecretFor(ctx, "downloader-api", "consumer", "indexer", "provider", "downloader", "", "password"); err != nil {
+		t.Fatal(err)
+	}
+	g2 := generationOf()
+	if g2 == g1 {
+		t.Fatal("a new consumer did not remake the shared value")
+	}
+	if pairGeneration("manager") != g2 || pairGeneration("indexer") != g2 {
+		t.Fatalf("not every holder was sealed in the new act: %s %s %s", g2, pairGeneration("manager"), pairGeneration("indexer"))
+	}
+	holders, err := inv.SharedHolders(ctx, "provider", "downloader", "password")
+	if err != nil || !reflect.DeepEqual(holders, []string{"consumer", "provider"}) {
+		t.Fatalf("the holders: %v %v", holders, err)
+	}
+
+	// Rotation remakes every copy.
+	if err := inv.RotateModuleSecret(ctx, "provider", "downloader", "password"); err != nil {
+		t.Fatal(err)
+	}
+	g3 := generationOf()
+	if g3 == g2 || pairGeneration("manager") != g3 || pairGeneration("indexer") != g3 {
+		t.Fatal("rotation did not remake every holder's copy")
+	}
+
+	// An accepted value: sealed to the consumers of the moment, and a later consumer is refused.
+	if err := inv.AcceptSecretForModule(ctx, "provider", "downloader", "password", "the-real-one"); err != nil {
+		t.Fatal(err)
+	}
+	if err := inv.RegisterModule(ctx, catalogue.Manifest{Module: "late", Version: "1", Requires: []string{"downloader-api"}}, Source{}); err != nil {
+		t.Fatal(err)
+	}
+	_, err = inv.SharedSecretFor(ctx, "downloader-api", "consumer", "late", "provider", "downloader", "", "password")
+	if err == nil || !strings.Contains(err.Error(), "given to the mesh") {
+		t.Fatalf("a consumer binding after an acceptance must be refused with the way out: %v", err)
+	}
+}

internal/link/build.go

@@ -43,6 +43,23 @@ type BuildRequest struct {
 	// written in a manifest the mesh has not read: it is inside the repository, and reading it is
 	// the build's first act.
 	Held map[string]string `json:"held,omitempty"`
+	// Seats is the clone base — `scheme://host:port` — of each seat a recipe's context may name
+	// (novox/hq ADR 0155): `git` for this mesh's own forge. Sent with the asking for the reason
+	// Held is: the context is written in a manifest the mesh has not read, and only the mesh knows
+	// which forge holds the seat here. A builder handed no base for a seat a context names refuses
+	// the build and says so.
+	Seats map[string]string `json:"seats,omitempty"`
+	// Source is the repository as the mesh records it when it lives on a seat's holder — the seat
+	// and the path on it, never the URL just composed (novox/hq ADR 0111). Carried with the
+	// asking and echoed in the outcome, so whoever hears the outcome can register the module with
+	// its true source, whether or not they were the one who asked (novox/hq issue 176).
+	Source *SourceOnSeat `json:"source,omitempty"`
+}
+
+// SourceOnSeat names a repository by the seat whose holder serves it and its path there.
+type SourceOnSeat struct {
+	Seat       string `json:"seat"`
+	Repository string `json:"repository"`
 }
 
 // BuildResult is what a builder says back.
@@ -95,6 +112,9 @@ type BuildResult struct {
 
 	// Failed is why, when it did.
 	Failed string `json:"failed,omitempty"`
+
+	// Source is the request's, echoed: the seat form of the repository, for whoever registers.
+	Source *SourceOnSeat `json:"source,omitempty"`
 }
 
 // ReadRepository is a repository a build read source from besides the module's own, at the branch,

internal/link/builds.go

@@ -27,6 +27,40 @@ const TheBuildMachine = "mesh-build-machine"
 func BuildWork() string    { return "mesh.seat." + TheBuildMachine + ".accept.build" }
 func BuildOutcome() string { return "mesh.seat." + TheBuildMachine + ".event.built" }
 
+// BuildStarted is where a build machine says it has taken a build, and BuildLog is where it says
+// what it is doing, one line per message, under the build's own id (novox/hq ADR 0157).
+//
+// **The whole build is on the bus as it happens.** The outcome alone told a person that a build
+// failed and its first line why; everything between — which command, how long, where it hung —
+// lived in one container's stderr on one machine. Every line is now an event of the role, retained
+// with the rest of the mesh's events, so a reader follows a build live by subscribing its subject,
+// or reads it back afterwards from the stream, and a viewer is a subscriber and nothing more.
+func BuildStarted() string      { return "mesh.seat." + TheBuildMachine + ".event.started" }
+func BuildLog(id string) string { return "mesh.seat." + TheBuildMachine + ".event.log." + id }
+
+// BuildStart is what a build machine says the moment it takes a build.
+type BuildStart struct {
+	ID         string `json:"id"`
+	Repository string `json:"repository"`
+	Path       string `json:"path,omitempty"`
+	Ref        string `json:"ref,omitempty"`
+	On         string `json:"on"`
+	At         string `json:"at"`
+}
+
+// BuildLine is one thing a build said while building.
+type BuildLine struct {
+	ID string `json:"id"`
+	// Seq counts the lines of one build from 1, so a reader that joined late or read two copies
+	// can order them and see a gap.
+	Seq int    `json:"seq"`
+	At  string `json:"at"`
+	// Step is which part of the build spoke — clone, context, image, run, failed — and Message is
+	// what it said, as the builder's own log prints it.
+	Step    string `json:"step"`
+	Message string `json:"message"`
+}
+
 // KeyRoleBuilt is the build outcome under the role's name, on the bus the mesh runs on today.
 //
 // The same event as KeyModuleBuilt and published beside it, because a catalogue installed before this
@@ -44,6 +78,12 @@ type Builders interface {
 	// need different remedies, which is why the message distinguishes them.
 	Submit(ctx context.Context, request BuildRequest, wait time.Duration) (BuildResult, error)
 
+	// Ask submits one build and does not wait: the outcome is the role's event, heard and taken in
+	// by the controller whether or not anybody waited (novox/hq issue 176). For a caller that
+	// cannot hold a connection for the minutes a build takes — a tool call — and follows the build
+	// by its id instead.
+	Ask(ctx context.Context, request BuildRequest) error
+
 	// Close lets go of whatever was dialled.
 	Close()
 }
@@ -57,6 +97,13 @@ type BuildMachine interface {
 
 // Build is one request a machine has been handed.
 type Build interface {
+	// Began says the build has been taken and is under way, before anything runs.
+	Began(ctx context.Context) error
+
+	// Say publishes one line of what the build is doing. Never fails the build: a line the bus
+	// did not take is a line lost, and the outcome still comes.
+	Say(step, message string)
+
 	// Request is what to build.
 	Request() BuildRequest
 

internal/link/builds_nats.go

@@ -43,6 +43,20 @@ func (b *natsBuilds) Close() {
 	}
 }
 
+// Ask publishes the work and returns; see Builders.
+func (b *natsBuilds) Ask(ctx context.Context, request BuildRequest) error {
+	body, err := json.Marshal(request)
+	if err != nil {
+		return err
+	}
+	publish, cancel := context.WithTimeout(ctx, 30*time.Second)
+	defer cancel()
+	if _, err := b.js.Context().Publish(BuildWork(), body, nats.Context(publish)); err != nil {
+		return fmt.Errorf("cannot submit a build: %w", err)
+	}
+	return nil
+}
+
 func (b *natsBuilds) Submit(ctx context.Context, request BuildRequest,
 	wait time.Duration) (BuildResult, error) {
 
@@ -169,6 +183,7 @@ type natsBuild struct {
 	msg     *nats.Msg
 	on      string
 	js      *broker.JetStream
+	seq     int
 }
 
 func (b *natsBuild) Request() BuildRequest { return b.request }
@@ -203,4 +218,37 @@ func (b *natsBuild) Announce(ctx context.Context, result BuildResult) error {
 
 func (b *natsBuild) Done() error { return b.msg.Ack() }
 
+// Began publishes that this machine has taken the build, into the stream like the outcome, so a
+// reader that asks afterwards sees when it started as well as how it ended.
+func (b *natsBuild) Began(ctx context.Context) error {
+	body, err := json.Marshal(BuildStart{
+		ID: b.request.ID, Repository: b.request.Repository, Path: b.request.Path,
+		Ref: b.request.Ref, On: b.on, At: time.Now().UTC().Format(time.RFC3339Nano),
+	})
+	if err != nil {
+		return err
+	}
+	publish, cancel := context.WithTimeout(ctx, 30*time.Second)
+	defer cancel()
+	if _, err := b.js.Context().Publish(BuildStarted(), body, nats.Context(publish)); err != nil {
+		return fmt.Errorf("cannot say a build started: %w", err)
+	}
+	return nil
+}
+
+// Say publishes one line under the build's id. Core publish, unawaited: the stream that holds the
+// role's events captures it on its way through, and a build must not slow to the pace of an ack
+// per line. A line the bus did not take is counted anyway, so the gap is visible to a reader.
+func (b *natsBuild) Say(step, message string) {
+	b.seq++
+	body, err := json.Marshal(BuildLine{
+		ID: b.request.ID, Seq: b.seq, At: time.Now().UTC().Format(time.RFC3339Nano),
+		Step: step, Message: message,
+	})
+	if err != nil {
+		return
+	}
+	_ = b.js.Conn().Publish(BuildLog(b.request.ID), body)
+}
+
 func (b *natsBuild) Hold(after time.Duration) error { return b.msg.NakWithDelay(after) }

internal/link/builds_nats_test.go

@@ -79,6 +79,14 @@ func TestNatsABuildIsTakenAndItsOutcomeReachesEverybody(t *testing.T) {
 	defer func() { _ = watching.Unsubscribe() }()
 	_ = js.Conn().Flush()
 
+	// And a reader following this one build by its subject alone (novox/hq ADR 0157).
+	lines, err := js.Conn().SubscribeSync(BuildLog("b-1"))
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer func() { _ = lines.Unsubscribe() }()
+	_ = js.Conn().Flush()
+
 	// A build machine holding the role.
 	machine := MachineOverNATS(js, "anchor")
 	defer machine.Close()
@@ -86,6 +94,9 @@ func TestNatsABuildIsTakenAndItsOutcomeReachesEverybody(t *testing.T) {
 	go func() {
 		failed <- machine.Take(ctx, func(ctx context.Context, work Build) {
 			r := work.Request()
+			_ = work.Began(ctx)
+			work.Say("clone", "cloning /r")
+			work.Say("image", "building shop")
 			_ = work.Announce(ctx, BuildResult{
 				ID: r.ID, Repository: r.Repository, On: "anchor", Commit: "abc1234",
 				Manifest: json.RawMessage(`{"module":"shop"}`),
@@ -104,6 +115,27 @@ func TestNatsABuildIsTakenAndItsOutcomeReachesEverybody(t *testing.T) {
 		}
 		t.Fatalf("the asker never got an outcome: %v", err)
 	}
+	// The reader heard the build as it went, in order, under its id.
+	for want := 1; want <= 2; want++ {
+		msg, err := lines.NextMsg(5 * time.Second)
+		if err != nil {
+			t.Fatalf("line %d of the build never reached its subject: %v", want, err)
+		}
+		var line BuildLine
+		if err := json.Unmarshal(msg.Data, &line); err != nil || line.ID != "b-1" || line.Seq != want {
+			t.Fatalf("line %d came back as %s (%v)", want, msg.Data, err)
+		}
+	}
+	// And it is in the stream for a reader who comes later.
+	info, err := js.Context().StreamInfo(broker.EventsStream, &nats.StreamInfoRequest{SubjectsFilter: BuildLog("b-1")})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if info.State.Subjects[BuildLog("b-1")] != 2 {
+		t.Fatalf("the stream holds %v under the build's subject, want 2", info.State.Subjects)
+	}
+	if err == nil {
+	}
 	if result.ID != "b-1" || result.Commit != "abc1234" {
 		t.Fatalf("the asker got %+v", result)
 	}

internal/link/seattools.go

@@ -0,0 +1,127 @@
+package link
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"log"
+	"time"
+
+	"github.com/nats-io/nats.go"
+)
+
+// A role's tools, served by its holder (novox/hq ADR 0132, ADR 0154).
+//
+// The mesh's own verbs — `status`, `push`, `assign` — are the mesh-controller seat's tools, and the
+// control plane is that seat's holder. So it answers them here, on the seat's subjects, the way a
+// module's runtime answers a module's: one request, one reply on the asker's own inbox, `{result}` or
+// `{error}`. Nothing about the transport is the command's business; a handler is a function of its
+// arguments and gets the same answer the command line prints.
+
+// ToolHandler answers one call of a role's tool. What it returns is marshalled as the result; an
+// error is the tool answering with one, which is an answer and not a timeout.
+type ToolHandler func(ctx context.Context, args json.RawMessage) (any, error)
+
+// SeatToolSubject is where a mesh-scoped seat's tool is asked (design 33 §4).
+func SeatToolSubject(seat, verb string) string { return "mesh.seat." + seat + ".tool." + verb }
+
+// HandlerTimeout bounds one answer. A verb that runs a command — a push, a build with no wait —
+// answers in seconds; anything that has not in this long is said to have not answered.
+const HandlerTimeout = 5 * time.Minute
+
+// RebindAfter is how long a refused subscription waits before it is tried again.
+const RebindAfter = 30 * time.Second
+
+// ServeSeatTools binds every handler on its seat's subject until stopped. A queue group per seat, so
+// a second holder during a handover shares the calls rather than both answering one.
+//
+// **A holder binds when it may, not only when it starts.** The grant that lets the controller
+// subscribe its seat's tools is a line in the bus's user list, and that list is composed by the
+// controller and delivered to the broker's machine by a push — so the first controller to serve
+// these started before the list named them, the server refused every subscription, and nothing
+// tried again (2026-09-30). A refused subscription is therefore retried until it holds: the server
+// says so asynchronously and invalidates the subscription, which is what is checked.
+func (b OverNATS) ServeSeatTools(seat string, handlers map[string]ToolHandler, logger *log.Logger) (func(), error) {
+	var subs []*nats.Subscription
+	done := make(chan struct{})
+	stop := func() {
+		close(done)
+		for _, s := range subs {
+			_ = s.Unsubscribe()
+		}
+	}
+	for verb, handle := range handlers {
+		verb, handle := verb, handle
+		subject := SeatToolSubject(seat, verb)
+		bind := func() (*nats.Subscription, error) {
+			return b.Conn.QueueSubscribe(subject, "seat."+seat, func(msg *nats.Msg) {
+				// Its own goroutine per call: a slow `push` must not hold up a `status` asked beside it,
+				// and the library would otherwise run handlers one after another.
+				go func() {
+					ctx, cancel := context.WithTimeout(context.Background(), HandlerTimeout)
+					defer cancel()
+					args := json.RawMessage(msg.Data)
+					if len(args) == 0 {
+						args = json.RawMessage(`{}`)
+					}
+					var reply []byte
+					result, err := handle(ctx, args)
+					if err != nil {
+						reply, _ = json.Marshal(map[string]any{"error": err.Error()})
+					} else if reply, err = json.Marshal(map[string]any{"result": result}); err != nil {
+						reply, _ = json.Marshal(map[string]any{"error": "the answer could not be written as JSON: " + err.Error()})
+					}
+					if err := msg.Respond(reply); err != nil && logger != nil {
+						logger.Printf("%s: could not answer: %v", subject, err)
+					}
+				}()
+			})
+		}
+		sub, err := bind()
+		if err != nil {
+			stop()
+			return nil, fmt.Errorf("serving %s: %w", subject, err)
+		}
+		subs = append(subs, sub)
+		go keepBound(sub, bind, subject, done, logger)
+	}
+	if logger != nil {
+		logger.Printf("serving %d tool(s) of the %s seat", len(handlers), seat)
+	}
+	return stop, nil
+}
+
+// keepBound watches one subscription and re-binds it after the server refused it, until stopped.
+// A subscription the server refused is invalid a moment after it was made; one it accepted stays
+// valid. Checked rather than hooked, because the connection's error handler belongs to whoever
+// dialled and a second one would replace it.
+func keepBound(sub *nats.Subscription, bind func() (*nats.Subscription, error), subject string,
+	done <-chan struct{}, logger *log.Logger) {
+	current := sub
+	for {
+		select {
+		case <-done:
+			return
+		case <-time.After(3 * time.Second):
+		}
+		if current.IsValid() {
+			// Settled; from here a lost subscription is a lost connection, which the client
+			// restores itself with every subscription it holds.
+			return
+		}
+		if logger != nil {
+			logger.Printf("%s: the bus refused the subscription; trying again in %s — the grant "+
+				"arrives with the next push to the machine holding mesh-broker", subject, RebindAfter)
+		}
+		select {
+		case <-done:
+			return
+		case <-time.After(RebindAfter):
+		}
+		again, err := bind()
+		if err != nil {
+			continue
+		}
+		current = again
+	}
+}

internal/secrets/seal.go

@@ -45,6 +45,26 @@ type Sealed struct {
 	ProviderKey string
 }
 
+// Fresh is a new secret value, the shape Make seals: for the one caller that must seal one value
+// to many holders at once (novox/hq ADR 0158) and discards it the same way.
+func Fresh() string {
+	value := make([]byte, 30)
+	if _, err := rand.Read(value); err != nil {
+		panic("the system's random source failed: " + err.Error())
+	}
+	return base64.RawURLEncoding.EncodeToString(value)
+}
+
+// Stamp is a random mark for one act of sealing a value to several holders: rows carrying the same
+// stamp were sealed from the same value, which the mesh cannot otherwise tell, holding no plaintext.
+func Stamp() string {
+	mark := make([]byte, 16)
+	if _, err := rand.Read(mark); err != nil {
+		panic("the system's random source failed: " + err.Error())
+	}
+	return hex.EncodeToString(mark)
+}
+
 // Make generates a secret and seals it to both ends, keeping no readable copy.
 //
 // The plaintext exists for the length of this call. Rotation is therefore generating a new one

module.json

@@ -18,22 +18,36 @@
     }
   ],
   "own-secrets": {
-    "inventory": "/var/lib/mesh/mesh-controller/inventory",
+    "inventory": "${dir:mesh-state}/inventory",
-    "identity": "/var/lib/mesh/mesh-controller/identity",
+    "identity": "${dir:mesh-state}/identity",
-    "licences": "/var/lib/mesh/mesh-controller/licences",
+    "licences": "${dir:mesh-state}/licences",
-    "broker": "/var/lib/mesh/mesh-controller/broker",
+    "broker": "${dir:mesh-state}/broker",
-    "broker-management": "/var/lib/mesh/mesh-controller/broker-management",
+    "broker-management": "${dir:mesh-state}/broker-management",
-    "broker-address": "/var/lib/mesh/mesh-controller/broker-address",
+    "broker-address": "${dir:mesh-state}/broker-address",
-    "bus": "/var/lib/mesh/mesh-controller/bus"
+    "bus": "${dir:mesh-state}/bus"
   },
   "secrets-owner": "65534:65534",
   "prepares": true,
+  "tools": [
+    "tools",
+    "status",
+    "nodes",
+    "node",
+    "modules",
+    "seats",
+    "builds",
+    "plan",
+    "assign",
+    "unassign",
+    "push",
+    "build"
+  ],
   "resources": [
     {
       "id": "mesh-state",
       "type": "directory",
-      "path": "/var/lib/mesh/mesh-controller",
+      "mode": "0700",
-      "mode": "0700"
+      "place": "mesh"
     },
     {
       "id": "server",
@@ -59,13 +73,13 @@
       },
       "volumes": [
         "/var/lib/mesh-broker-tls:/broker-tls:ro",
-        "/var/lib/mesh/mesh-controller/inventory:/run/secrets/inventory:ro",
+        "${dir:mesh-state}/inventory:/run/secrets/inventory:ro",
-        "/var/lib/mesh/mesh-controller/identity:/run/secrets/identity:ro",
+        "${dir:mesh-state}/identity:/run/secrets/identity:ro",
-        "/var/lib/mesh/mesh-controller/licences:/run/secrets/licences:ro",
+        "${dir:mesh-state}/licences:/run/secrets/licences:ro",
-        "/var/lib/mesh/mesh-controller/broker:/run/secrets/broker:ro",
+        "${dir:mesh-state}/broker:/run/secrets/broker:ro",
-        "/var/lib/mesh/mesh-controller/bus:/run/secrets/bus:ro",
+        "${dir:mesh-state}/bus:/run/secrets/bus:ro",
-        "/var/lib/mesh/mesh-controller/broker-management:/run/secrets/broker-management:ro",
+        "${dir:mesh-state}/broker-management:/run/secrets/broker-management:ro",
-        "/var/lib/mesh/mesh-controller/broker-address:/run/secrets/broker-address:ro"
+        "${dir:mesh-state}/broker-address:/run/secrets/broker-address:ro"
       ],
       "artifact": "server",
       "restart-on": [