diff --git a/modules/mesh-delivery-builder/internal/build/buildread.go b/modules/mesh-delivery-builder/internal/build/buildread.go
index ec924e57..859e434c 100644
--- a/modules/mesh-delivery-builder/internal/build/buildread.go
+++ b/modules/mesh-delivery-builder/internal/build/buildread.go
@@ -171,7 +171,7 @@ func (r *BuildReader) stepNode(v builds.BuilderBuild) string {
 	}
 	slices.Sort(languages)
 	for _, l := range languages {
-		bm, _ := buildstep.BuildModuleOf(l)
+		bm, _ := buildstep.BuildSeat(l) // the steps are by build seat (StuckReader.Steps)
 		st, ok := r.Steps.Steps[bm]
 		k, found := r.index[bm][v.Asks[l]]
 		if !ok || !found {
diff --git a/modules/mesh-delivery-builder/internal/build/run_test.go b/modules/mesh-delivery-builder/internal/build/run_test.go
index 7451bff1..37c788f3 100644
--- a/modules/mesh-delivery-builder/internal/build/run_test.go
+++ b/modules/mesh-delivery-builder/internal/build/run_test.go
@@ -154,7 +154,8 @@ func (r *rig) answer(a buildstep.StepAsk) buildstep.Step {
 	if node == "" {
 		node = "ace"
 	}
-	module, _ := buildstep.BuildModuleOf(a.Language)
+	bm, _ := testSeats().OfAskLanguage(a.Language)
+	module := bm.Module
 	runner := buildrun.Runner{Caller: r.bm, Steps: r.bm.steps, Bound: time.Second}
 	tool := func(name string) stepFunc {
 		return func(ctx context.Context, args map[string]any) (any, error) {
diff --git a/modules/mesh-delivery-checker/internal/check/examiner_test.go b/modules/mesh-delivery-checker/internal/check/examiner_test.go
index 7b006a3a..32f9b140 100644
--- a/modules/mesh-delivery-checker/internal/check/examiner_test.go
+++ b/modules/mesh-delivery-checker/internal/check/examiner_test.go
@@ -212,7 +212,8 @@ var toolPrefix = map[string]string{goBuildModule: "build_go_", nodeBuildModule:
 // answer runs a check ask as the build module that pulls it does (gobuild.RunAsk), with the fake tools on shanks and the
 // bench's kept verdicts, and answers the step it writes.
 func (b *bench) answer(a buildstep.StepAsk) buildstep.Step {
-	module, _ := buildstep.BuildModuleOf(a.Language)
+	bm, _ := testSeats().OfAskLanguage(a.Language)
+	module := bm.Module
 	const node = "shanks"
 	tool := func(name string) gobuild.StepFunc {
 		return func(ctx context.Context, args map[string]any) (any, error) {
diff --git a/modules/mesh-delivery-watchman/cmd/mesh-delivery-watchman/integration_test.go b/modules/mesh-delivery-watchman/cmd/mesh-delivery-watchman/integration_test.go
index ec19015b..97ef4b04 100644
--- a/modules/mesh-delivery-watchman/cmd/mesh-delivery-watchman/integration_test.go
+++ b/modules/mesh-delivery-watchman/cmd/mesh-delivery-watchman/integration_test.go
@@ -69,6 +69,14 @@ func serveOwners(t *testing.T, ctx context.Context, js jetstream.JetStream, nc *
 	t.Helper()
 	viewstest.Serve(t, ctx, js, nc, watch.AssignerModule, wantsState, watch.AssignerModule+".assigner_read_wants", "n1_"+watch.WatchmanModule)
 	viewstest.Serve(t, ctx, js, nc, watch.IndexerModule, modulesState, watch.IndexerModule+".indexer_read_modules", "n1_"+watch.WatchmanModule)
+	// The seat that places modules says who holds each build seat (design 47 G A-126): the module whose steps the watchman watches.
+	held, _ := json.Marshal(map[string]any{"result": map[string]any{"seats": []map[string]any{
+		{"seat": "node-build-go", "holders": []map[string]string{{"module": "mesh-build-go"}}}}}, "node": "ctl"})
+	for _, subject := range []string{"mesh.seat.mesh-module-assigner.call.assignments", "mesh.seat.mesh-module-assigner.call.assignments.>"} {
+		if _, err := nc.Subscribe(subject, func(m *nats.Msg) { _ = m.Respond(held) }); err != nil {
+			t.Fatal(err)
+		}
+	}
 }
 
 // findingsStream is the watchman's own stream of its findings' events (design 47 G §383), which its finding writer says into.
diff --git a/modules/mesh-delivery-watchman/cmd/mesh-delivery-watchman/main.go b/modules/mesh-delivery-watchman/cmd/mesh-delivery-watchman/main.go
index 3398eca1..9e92c521 100644
--- a/modules/mesh-delivery-watchman/cmd/mesh-delivery-watchman/main.go
+++ b/modules/mesh-delivery-watchman/cmd/mesh-delivery-watchman/main.go
@@ -19,6 +19,7 @@ import (
 	"time"
 
 	"git.novox.be/novox/mesh-sdk/go/process"
+	"git.novox.be/novox/mesh-sdk/go/seatlist"
 	"git.novox.be/novox/mesh-sdk/go/views"
 
 	"github.com/nats-io/nats.go"
@@ -345,7 +346,16 @@ func run(ctx context.Context, getenv func(string) string, logOut io.Writer) erro
 	// keeps no steps bucket (yet) is said and left; the asks of its stream are mirrored all the same.
 	taken := map[string]jetstream.KeyWatcher{}
 	for _, lang := range buildstep.AskLanguages {
-		module, _ := buildstep.BuildModuleOf(lang)
+		seat, err := buildstep.BuildSeat(lang)
+		if err != nil {
+			continue
+		}
+		// The build module is the holder of the build seat (design 47 G A-82, A-126): asked of the seat that places modules.
+		module, err := seatlist.HolderOf(calls.Call, seat)
+		if err != nil {
+			logger.Printf("the steps of %s cannot be read (%v): its asks are mirrored and never seen taken", seat, err)
+			continue
+		}
 		kv, err := js.KeyValue(ctx, watch.StepsBucket(module))
 		if err != nil {
 			logger.Printf("the steps of %s cannot be read (%v): its asks are mirrored and never seen taken", module, err)
diff --git a/modules/mesh-delivery-watchman/internal/watch/names.go b/modules/mesh-delivery-watchman/internal/watch/names.go
index 6b2cf0e5..e9bf2353 100644
--- a/modules/mesh-delivery-watchman/internal/watch/names.go
+++ b/modules/mesh-delivery-watchman/internal/watch/names.go
@@ -39,5 +39,5 @@ const (
 	FindingNodeAccountFallback = "node-account-fallback"
 )
 
-// StepsBucket is a build module's state steps (reads: mesh-build-go.steps, mesh-build-image.steps, mesh-build-node.steps).
+// StepsBucket is a build module's state steps (reads: the build seats' steps, `seat:node-build-<language>.steps`, held by the module that holds the seat).
 func StepsBucket(module string) string { return module + "_steps" }
diff --git a/modules/mesh-delivery-watchman/manifest_test.go b/modules/mesh-delivery-watchman/manifest_test.go
index 5f6a53dc..70e977ac 100644
--- a/modules/mesh-delivery-watchman/manifest_test.go
+++ b/modules/mesh-delivery-watchman/manifest_test.go
@@ -13,6 +13,8 @@ import (
 	"testing"
 
 	"mesh-delivery-watchman/internal/watch"
+
+	"git.novox.be/novox/mesh-sdk/go/seatlist"
 )
 
 // The controller's manifest reader is mesh-controller internal/catalogue (ParseManifest), an internal package of another
@@ -56,6 +58,7 @@ type manifest struct {
 	Reads    []string `json:"reads"`
 	Consumes []string `json:"consumes"`
 	Invokes  []string `json:"invokes"`
+	Requires []any    `json:"requires"`
 	State    []state  `json:"state"`
 	Streams  []struct {
 		Name       string   `json:"name"`
@@ -101,8 +104,9 @@ func TestManifestStateAndReads(t *testing.T) { // 1135/AC6
 	}
 	reads := slices.Clone(m.Reads)
 	slices.Sort(reads)
-	if !reflect.DeepEqual(reads, []string{"mesh-build-go.steps", "mesh-build-image.steps", "mesh-build-node.steps",
-		"mesh-delivery-builder.builds", "mesh-host.health", "mesh-provisioner.provisions", "node-engine.have"}) {
+	// The build modules are no names (design 47 G A-82): the steps are the states of the holders of the build seats.
+	if !reflect.DeepEqual(reads, []string{"mesh-delivery-builder.builds", "mesh-host.health", "mesh-provisioner.provisions", "node-engine.have",
+		"seat:node-build-go.steps", "seat:node-build-image.steps", "seat:node-build-node.steps"}) {
 		t.Errorf("reads = %v", reads)
 	}
 	// Design 47 G §368: the version is MAJOR.MINOR and nothing else.
@@ -123,7 +127,7 @@ func TestManifestStateAndReads(t *testing.T) { // 1135/AC6
 	}
 	// The join: its first view asked again by hand is a hand act, recorded through the seat (views.StatusTools). The waits the
 	// indexer holds at the watchman's start are asked of its tool (ADR 0633 §5), a verb edge as the view's.
-	if want := []string{"mesh-delivery-assigner.assigner_read_wants", "mesh-delivery-indexer.indexer_pending", "mesh-delivery-indexer.indexer_read_modules", "seat:mesh-hand-acts.hand-act"}; !reflect.DeepEqual(m.Invokes, want) {
+	if want := []string{"mesh-delivery-assigner.assigner_read_wants", "mesh-delivery-indexer.indexer_pending", "mesh-delivery-indexer.indexer_read_modules", "seat:mesh-hand-acts.hand-act", "seat:mesh-module-assigner.assignments"}; !reflect.DeepEqual(m.Invokes, want) {
 		t.Errorf("invokes = %v, want %v", m.Invokes, want)
 	}
 	// DLV-M5 its first views, 1585/T20 the indexer's take-in events, and DLV-W1 (ADR 0595 §4): the accepted verdicts and the bus module's created and refused, durably.
@@ -165,14 +169,16 @@ func TestManifestStateAndReads(t *testing.T) { // 1135/AC6
 		return e
 	}
 	for name, row := range map[string]struct{ got, want string }{
-		"module":     {watch.WatchmanModule, m.Module},
-		"presence":   {watch.PresenceBucket, m.Module + "_" + m.State[0].Name},
-		"pulse":      {watch.PulseBucket, m.Module + "_" + m.State[1].Name},
-		"stuck":      {watch.StuckBucket, m.Module + "_" + m.State[2].Name},
-		"have":       {watch.HaveBucket, bucket(m.Reads, "node-engine.have")},
-		"health":     {watch.NodeHealthBucket, bucket(m.Reads, "mesh-host.health")},
-		"builds":     {watch.BuilderBuildsBucket, bucket(m.Reads, "mesh-delivery-builder.builds")},
-		"steps":      {watch.StepsBucket("mesh-build-go"), bucket(m.Reads, "mesh-build-go.steps")},
+		"module":   {watch.WatchmanModule, m.Module},
+		"presence": {watch.PresenceBucket, m.Module + "_" + m.State[0].Name},
+		"pulse":    {watch.PulseBucket, m.Module + "_" + m.State[1].Name},
+		"stuck":    {watch.StuckBucket, m.Module + "_" + m.State[2].Name},
+		"have":     {watch.HaveBucket, bucket(m.Reads, "node-engine.have")},
+		"health":   {watch.NodeHealthBucket, bucket(m.Reads, "mesh-host.health")},
+		"builds":   {watch.BuilderBuildsBucket, bucket(m.Reads, "mesh-delivery-builder.builds")},
+		// The build modules are no names (design 47 G A-82): the steps are read as the states of the holders of the build seats.
+		"steps":      {"seat:node-build-go.steps", entry(m.Reads, "seat:node-build-go.steps")},
+		"holders":    {"seat:" + seatlist.HolderSeat + "." + seatlist.HolderVerb, entry(m.Invokes, "seat:"+seatlist.HolderSeat+"."+seatlist.HolderVerb)},
 		"wants":      {watch.AssignerWantsBucket, bucket(m.Consumes, "mesh-delivery-assigner.views.wants")},
 		"provisions": {watch.ProvisionsBucket, bucket(m.Reads, "mesh-provisioner.provisions")},
 		"modules":    {watch.ModulesBucket, bucket(m.Consumes, "mesh-delivery-indexer.views.modules")},
diff --git a/modules/mesh-delivery-watchman/module.json b/modules/mesh-delivery-watchman/module.json
index d51fa8b9..48d7c590 100644
--- a/modules/mesh-delivery-watchman/module.json
+++ b/modules/mesh-delivery-watchman/module.json
@@ -16,19 +16,20 @@
     }
   ],
   "reads": [
-    "mesh-build-go.steps",
-    "mesh-build-image.steps",
-    "mesh-build-node.steps",
     "mesh-delivery-builder.builds",
     "mesh-host.health",
     "mesh-provisioner.provisions",
-    "node-engine.have"
+    "node-engine.have",
+    "seat:node-build-go.steps",
+    "seat:node-build-image.steps",
+    "seat:node-build-node.steps"
   ],
   "invokes": [
     "mesh-delivery-assigner.assigner_read_wants",
     "mesh-delivery-indexer.indexer_pending",
     "mesh-delivery-indexer.indexer_read_modules",
-    "seat:mesh-hand-acts.hand-act"
+    "seat:mesh-hand-acts.hand-act",
+    "seat:mesh-module-assigner.assignments"
   ],
   "consumes": [
     "mesh-delivery-assigner.views.wants",