cmd/mesh-controller/batches.go

@@ -1049,7 +1049,7 @@ func planBatch(ctx context.Context, open *stores, batch *inventory.Plan, carry [
 		return nil
 	}
 	// Written and its first tier asked as one act on the plans (novox/hq issue 213), under the caller's hold.
-	if err := askTier(ctx, inv, &plan); err != nil {
+	if err := askTier(ctx, inv, &plan, plan.Tiers[plan.Tier]); err != nil {
 		return err
 	}
 	if err := inv.SavePlan(ctx, &plan); err != nil {

cmd/mesh-controller/plan_retry.go

@@ -372,6 +372,13 @@ func joinAPlan(ctx context.Context, open *stores, module string) (bool, string,
 	if !found {
 		return false, "", nil
 	}
+	// **A walk that waits for its delivery's word asks nothing** (novox/hq ADR 0239, issue 754): a rebuild does not
+	// join it, and its outcome is not the walk's. The walk asks its own tier once it has its word.
+	if p.Waiting() {
+		return false, fmt.Sprintf("not joining %s (%s at %s): it waits for %s's word, so this build is not its "+
+			"outcome; once let go, the walk asks %s itself", p.ID, p.Repository, short(p.Commit), p.Delivery.Awaits,
+			module), nil
+	}
 	entries, err := inv.Catalogued(ctx)
 	if err != nil {
 		return false, "", err

cmd/mesh-controller/queue.go

@@ -521,7 +521,9 @@ func rebuildCommand(ctx context.Context, args []string) error {
 	}
 
 	// **A module a plan holds unbuilt, or failed, joins that plan** rather than running beside it: the
-	// plan would ask it again, or stay failed on an outcome a rebuild has replaced.
+	// plan would ask it again, or stay failed on an outcome a rebuild has replaced. A walk waiting for its word
+	// is not joined (novox/hq issue 754): the rebuild runs beside it, and says so.
+	var beside string
 	if module != "" {
 		joined, said, err := joinAPlan(ctx, open, module)
 		if err != nil {
@@ -531,6 +533,7 @@ func rebuildCommand(ctx context.Context, args []string) error {
 			fmt.Println(said)
 			return nil
 		}
+		beside = said
 	}
 	id, err := askABuild(ctx, source, path, ref)
 	if err != nil {
@@ -538,6 +541,10 @@ func rebuildCommand(ctx context.Context, args []string) error {
 	}
 	recordAsked(ctx, inventory.BuildRequest{ID: id, Repository: source.Repository, Seat: source.Seat, Path: path,
 		Ref: ref, For: "rebuild"})
+	if beside != "" {
+		fmt.Printf("rebuild asked as %s, beside the walk: %s\n", id, beside)
+		return nil
+	}
 	fmt.Printf("rebuild asked as %s\n", id)
 	return nil
 }

cmd/mesh-controller/queue_test.go

@@ -637,8 +637,9 @@ func TestAPlanStoppedAtItsFirstMachineIsRetried(t *testing.T) {
 	stopped := inventory.Plan{ID: "plan-rollout", Repository: "novox/a", Branch: "main", Commit: "c0ffee",
 		Created: long, State: inventory.PlanFailed, Tiers: [][]string{{"a"}, {"b"}},
 		Note: "a stopped at its first machine in tier 0: laptop refused what it was sent",
-		Modules: map[string]*inventory.PlanModule{"a": {State: "built", BuiltAt: &long, Commit: "c0ffee",
-			First: []string{"laptop"}, FirstAt: &long, Why: "laptop refused what it was sent"}}}
+		// Asked by the plan, as every module a plan holds built is (novox/hq issue 754).
+		Modules: map[string]*inventory.PlanModule{"a": {State: "built", AskedAt: &long, Build: "build-a", BuiltAt: &long,
+			Commit: "c0ffee", First: []string{"laptop"}, FirstAt: &long, Why: "laptop refused what it was sent"}}}
 	if err := open.inventory.SavePlan(ctx, &stopped); err != nil {
 		t.Fatal(err)
 	}

cmd/mesh-controller/release_plan.go

@@ -259,10 +259,11 @@ func applied(module string, builtAt time.Time, running []string, reports []inven
 	return len(waiting) == 0, waiting
 }
 
-// askTier asks the build machine for every module of the tier, and marks each asked. A module
+// askTier asks the build machine for the named modules of the plan's tier — all of it, or what of it is still
+// unasked (novox/hq issue 754) — and marks each asked. A module
 // the catalogue no longer holds, or whose ask could not be made, is a failure of the plan: a tier
 // half asked is a tier that will never complete.
-func askTier(ctx context.Context, inv *inventory.Inventory, p *inventory.Plan) error {
+func askTier(ctx context.Context, inv *inventory.Inventory, p *inventory.Plan, names []string) error {
 	entries, err := inv.Catalogued(ctx)
 	if err != nil {
 		return err
@@ -271,12 +272,62 @@ func askTier(ctx context.Context, inv *inventory.Inventory, p *inventory.Plan) e
 	for _, e := range entries {
 		byName[e.Manifest.Module] = e
 	}
-	for _, name := range p.Tiers[p.Tier] {
+	for _, name := range names {
 		askModule(ctx, p, name, byName)
 	}
 	return nil
 }
 
+// unaskedOf are the modules of a plan's current tier it has still to ask: those it never asked, and one it holds
+// built that it never asked for (novox/hq issue 754) — a build taken in by a controller from before a walk took
+// only its own asks, somebody else's, which the walk would otherwise send as its own (ADR 0219). A tier partly asked is asked the rest, not
+// waited on for ever: a walk that waits for every build of a tier it never asked whole never moves again.
+func unaskedOf(p inventory.Plan) []string {
+	if p.Tier >= len(p.Tiers) {
+		return nil
+	}
+	var out []string
+	for _, m := range p.Tiers[p.Tier] {
+		s := p.Modules[m]
+		switch {
+		case s == nil || s.State == "":
+			out = append(out, m)
+		case s.State == "built" && s.Build == "" && s.AskedAt == nil:
+			out = append(out, m)
+		}
+	}
+	return out
+}
+
+// askedInTier says the plan asked a module of its current tier itself: under an id, or at a time it kept.
+func askedInTier(p inventory.Plan) bool {
+	if p.Tier >= len(p.Tiers) {
+		return false
+	}
+	for _, m := range p.Tiers[p.Tier] {
+		if s := p.Modules[m]; s != nil && (s.Build != "" || s.AskedAt != nil) {
+			return true
+		}
+	}
+	return false
+}
+
+// takesOutcome says whether a build's outcome is the plan's for a module of its current tier (novox/hq ADR 0219,
+// issues 219 and 754). **A walk that waits for its delivery's word asks nothing, and so is answered by nothing**
+// (ADR 0239): a rebuild that lands in the wait is somebody else's build. **Nor is a module the plan never asked
+// answered**: taken, the plan held a module built that it never asked, and waited for the rest of the tier for
+// ever. Asked under an id, the plan takes that id's outcome and no other; asked before ids were kept, a build
+// asked at or after the plan's ask.
+func takesOutcome(p inventory.Plan, state *inventory.PlanModule, asked time.Time, id string) bool {
+	if p.Waiting() || state == nil || (state.Build == "" && state.AskedAt == nil) {
+		return false
+	}
+	if state.Build != "" {
+		return state.Build == id
+	}
+	return !askedBefore(asked, state.AskedAt)
+}
+
 // askABuild is how a plan asks for one build, not waited for, and learns the id it asked under. A
 // variable so a test of what a plan does around an ask needs no build machine.
 //
@@ -526,22 +577,15 @@ func planBuiltSaying(ctx context.Context, open *stores, module, commit, failed s
 		if !inTier {
 			continue
 		}
-		state := p.Modules[module]
-		if state == nil {
-			state = &inventory.PlanModule{}
-			p.Modules[module] = state
-		}
 		// **The plan's own ask is its outcome, by id** (novox/hq ADR 0219); another build of the module
 		// is, as before, when it was asked at or after the plan's ask (issue 219).
 		// **A module asked under an id is answered by that id's outcome and no other** (novox/hq ADR
 		// 0219): a replay, a rebuild beside the plan, or an older ask finishing late is somebody else's
 		// build, made from other source, and settling the plan with it would send that. A plan from
-		// before ids were kept is matched as it was: by when the build was asked (issue 219).
-		if state.Build != "" {
-			if state.Build != id {
-				continue
-			}
-		} else if askedBefore(asked, state.AskedAt) {
+		// before ids were kept is matched as it was: by when the build was asked (issue 219). A walk
+		// waiting for its word, or a module it never asked, takes no outcome at all (issue 754).
+		state := p.Modules[module]
+		if !takesOutcome(*p, state, asked, id) {
 			continue
 		}
 		if failed != "" && deletedAtSource(failed) {
@@ -747,17 +791,11 @@ func advanceOnce(ctx context.Context, open *stores, p *inventory.Plan,
 		return true, nil
 	}
 	tier := p.Tiers[p.Tier]
-	// Not yet asked: ask.
-	unasked := 0
-	for _, m := range tier {
-		if s := p.Modules[m]; s == nil || s.State == "" {
-			unasked++
-		}
-	}
-	if unasked == len(tier) {
+	// Not yet asked: ask — the whole tier, or what of it is still unasked (novox/hq issue 754).
+	if unasked := unaskedOf(*p); len(unasked) > 0 {
 		// **One walk at a time** (novox/hq ADR 0276): a walk about to ask its first tier while another started
 		// walk is open waits for that one to end, let go or not, and says so.
-		if p.Tier == 0 {
+		if p.Tier == 0 && !askedInTier(*p) {
 			if behind, err := startedBeside(ctx, inv, p.ID, p.Created); err != nil {
 				return false, err
 			} else if behind != "" {
@@ -767,7 +805,10 @@ func advanceOnce(ctx context.Context, open *stores, p *inventory.Plan,
 				return changed, nil
 			}
 		}
-		if err := askTier(ctx, inv, p); err != nil {
+		if len(unasked) < len(tier) {
+			fmt.Printf("%s: tier %d was asked in part; asking the rest: %s\n", p.ID, p.Tier, strings.Join(unasked, ", "))
+		}
+		if err := askTier(ctx, inv, p, unasked); err != nil {
 			return false, err
 		}
 		return true, nil

cmd/mesh-controller/walk_wait_rebuild_754_test.go

@@ -0,0 +1,122 @@
+package main
+
+import (
+	"reflect"
+	"testing"
+	"time"
+
+	"github.com/novox/mesh-controller/internal/inventory"
+	"github.com/novox/mesh-controller/internal/link"
+)
+
+// novox/hq issue 754: a walk waiting for its delivery's word takes no build's outcome, nor does a walk take one for
+// a module it never asked; asked under an id, it takes that id's alone.
+func TestAWalkTakesOnlyTheOutcomesOfWhatItAsked(t *testing.T) {
+	asked := time.Date(2026, 10, 14, 23, 30, 0, 0, time.UTC)
+	before := asked.Add(-time.Minute)
+	waiting := inventory.Plan{Delivery: &inventory.PlanDelivery{Awaits: "mesh-delivery"}}
+	letGo := inventory.Plan{Delivery: &inventory.PlanDelivery{Awaits: "mesh-delivery", Go: &asked}}
+	own := &inventory.PlanModule{State: "asked", AskedAt: &asked, Build: "build-own"}
+	old := &inventory.PlanModule{State: "asked", AskedAt: &asked}
+	for _, c := range []struct {
+		what  string
+		p     inventory.Plan
+		state *inventory.PlanModule
+		at    time.Time
+		id    string
+		takes bool
+	}{
+		{"a rebuild while the walk waits", waiting, nil, asked, "build-rebuild", false},
+		{"its own id while it waits", waiting, own, asked, "build-own", false},
+		{"a module it never asked", letGo, nil, asked, "build-rebuild", false},
+		{"a module it never asked, state kept empty", letGo, &inventory.PlanModule{}, asked, "build-rebuild", false},
+		{"another id", letGo, own, asked, "build-rebuild", false},
+		{"its own id", letGo, own, asked, "build-own", true},
+		{"a plan from before ids, asked after it", letGo, old, asked.Add(time.Second), "x", true},
+		{"a plan from before ids, asked before it", letGo, old, before, "x", false},
+		{"a plan with no delivery, its own id", inventory.Plan{}, own, asked, "build-own", true},
+	} {
+		if got := takesOutcome(c.p, c.state, c.at, c.id); got != c.takes {
+			t.Errorf("%s: takes %v, want %v", c.what, got, c.takes)
+		}
+	}
+}
+
+// novox/hq issue 754: a tier partly asked asks the rest; a module held built that the plan never asked — the live
+// shape, a hand rebuild taken in during the wait, built after the plan was made — is asked again; one asked is kept.
+func TestATierPartlyAskedAsksTheRest(t *testing.T) {
+	created := time.Date(2026, 10, 14, 23, 30, 0, 0, time.UTC)
+	earlier, later := created.Add(-time.Hour), created.Add(7*time.Minute)
+	p := inventory.Plan{Created: created, Tiers: [][]string{{"build-agent", "gitea", "route-proxy", "stale", "kept", "own"}},
+		Modules: map[string]*inventory.PlanModule{
+			"gitea":       {},
+			"route-proxy": {State: "built", BuiltAt: &later, Commit: "c51357f8"},
+			"stale":       {State: "built", BuiltAt: &earlier},
+			"kept":        {State: "asked", AskedAt: &created, Build: "build-kept"},
+			"own":         {State: "built", AskedAt: &created, BuiltAt: &later, Build: "build-own"},
+		}}
+	if got, want := unaskedOf(p), []string{"build-agent", "gitea", "route-proxy", "stale"}; !reflect.DeepEqual(got, want) {
+		t.Fatalf("unasked %v, want %v", got, want)
+	}
+	if !askedInTier(p) {
+		t.Fatal("a tier with a module asked under an id reads as never asked")
+	}
+	p.Modules["kept"], p.Modules["own"] = nil, nil
+	if askedInTier(p) {
+		t.Fatal("a tier the plan never asked reads as asked")
+	}
+}
+
+// novox/hq issue 754, as seen on 2026-10-14: a rebuild lands while the walk waits for its word; the walk is let go;
+// it asks every module of its tier, and completes it once those builds come in.
+func TestARebuildInTheWaitIsNotTheWalksBuild(t *testing.T) {
+	open := aMesh(t)
+	ctx := t.Context()
+	asked := asksRecorded(t)
+	twoTiers(t, open)
+	created := time.Now().UTC().Add(-10 * time.Minute)
+	plan := inventory.Plan{ID: "plan-754", Repository: "novox/a", Branch: "main", Commit: "c0ffee", Created: created,
+		State: inventory.PlanBuilding, Tiers: [][]string{{"a", "b"}}, Modules: map[string]*inventory.PlanModule{},
+		Delivery: &inventory.PlanDelivery{Awaits: "mesh-delivery"}}
+	if err := open.inventory.SavePlan(ctx, &plan); err != nil {
+		t.Fatal(err)
+	}
+
+	// A rebuild of a, beside the waiting walk: not joined, and its outcome not taken.
+	joined, said, err := joinAPlan(ctx, open, "a")
+	if err != nil || joined || said == "" {
+		t.Fatalf("a rebuild joined a waiting walk: %v %q %v", joined, said, err)
+	}
+	planBuilt(ctx, open, "a", "c0ffee", "", time.Now().UTC(), "build-rebuild")
+	p, _ := open.inventory.PlanByID(ctx, plan.ID)
+	if s := p.Modules["a"]; s != nil && s.State != "" {
+		t.Fatalf("the waiting walk took a rebuild as its build: %+v", s)
+	}
+	if len(*asked) != 0 {
+		t.Fatalf("a waiting walk asked %v", *asked)
+	}
+
+	// Let go: both are asked, and their outcomes complete the tier.
+	if _, err := letGo(ctx, open.inventory, plan.ID, "operator", "test"); err != nil {
+		t.Fatal(err)
+	}
+	advancePlans(ctx, open)
+	p, _ = open.inventory.PlanByID(ctx, plan.ID)
+	for _, m := range []string{"a", "b"} {
+		if s := p.Modules[m]; s == nil || s.State != "asked" || s.Build == "" {
+			t.Fatalf("let go, %s is %+v", m, s)
+		}
+	}
+	if len(*asked) != 2 {
+		t.Fatalf("asked %v", *asked)
+	}
+	for _, m := range []string{"a", "b"} {
+		id := p.Modules[m].Build
+		at, _ := link.BuildAskedAt(id)
+		planBuilt(ctx, open, m, "c0ffee", "", at, id)
+	}
+	advancePlans(ctx, open)
+	if p, _ = open.inventory.PlanByID(ctx, plan.ID); p.Open() && p.Tier == 0 {
+		t.Fatalf("the walk did not get past its tier: %s at %d, %q", p.State, p.Tier, p.Note)
+	}
+}