Retire the controller's merges consumer and read merges from the forge bridge's stream, so a held merge can never again queue every merge or look like a deaf controller (issue 774)

The controller-merges consumer (no max-deliver, one at a time) held the de-spiegel merge e25e1beb from
10-29 09:39: keepForgeMerge put an announcement with its Paths into delivery-merges (16 KiB values), got
10054, retried "not now" forever, and 167 merges queued behind it. Every five-minute hold outran the deaf
bound, so core.controller.deaf flapped.

Merges are mesh-delivery's: the gate merges on the Approve and the forge bridge says each merge on its
stream FORGE (pull request, head, merge commit), kept a week. The controller's copy was a leftover, read
only at a moved module's registration (ADR 0420 §7, ADR 0432). That read now finds the merge on FORGE;
the consumer, its follow, its handler and its hold delays are removed, and every assertion removes the
retired consumer from the bus.

Kind fix for the watchdog: the event loop records when a message it held back is due again, and deafness
counts from then, so no hold longer than the bound (on any consumer) reads as deafness.

Quick fix: strip Paths from the kept announcement and add max-deliver with a dead letter. Thorough fix:
remove the duplicate duty and make the deaf watchdog hold-aware. Chose thorough: the controller is being
deprecated and the merges already have an owner; the hold-vs-deaf confusion is a kind, not one consumer.

Research 072 piece: 03-domains (Control shrinks to placement and composition; the delivery parts own
what a merge is) and milestone 3 (health signals stop sharing the controller's loop assumptions).

cmd/mesh-controller/forge_merge_bus_test.go

@@ -0,0 +1,31 @@
+//go:build integration
+
+package main
+
+import (
+	"context"
+	"testing"
+
+	"github.com/nats-io/nats.go/jetstream"
+
+	sdkdelivery "git.novox.be/novox/mesh-sdk/go/delivery"
+	"git.novox.be/novox/mesh-sdk/go/process"
+	"github.com/novox/mesh-controller/internal/broker"
+)
+
+// sayForgeMerge is the forge bridge saying a merge on its stream FORGE, which it makes when missing.
+func sayForgeMerge(ctx context.Context, t *testing.T, js *broker.JetStream, repo string, number int, head, merge string) {
+	t.Helper()
+	api, err := jetstream.New(js.Conn())
+	if err != nil {
+		t.Fatal(err)
+	}
+	if _, err := api.CreateOrUpdateStream(ctx, jetstream.StreamConfig{Name: forgeStream,
+		Subjects: []string{process.ModuleStreamSubject(sdkdelivery.ForgeBridgeModule, "forge.>")}}); err != nil {
+		t.Fatal(err)
+	}
+	subject, body := forgeMerged(t, repo, number, head, merge)
+	if _, err := api.Publish(ctx, subject, body); err != nil {
+		t.Fatal(err)
+	}
+}

cmd/mesh-controller/forge_merge_test.go

@@ -0,0 +1,91 @@
+package main
+
+import (
+	"context"
+	"encoding/json"
+	"strings"
+	"testing"
+
+	"github.com/nats-io/nats.go/jetstream"
+
+	sdkdelivery "git.novox.be/novox/mesh-sdk/go/delivery"
+)
+
+// fakeForge is the forge bridge's stream as forgeMergeAt reads it: messages by sequence, each on a subject.
+type fakeForge struct {
+	subjects []string
+	data     [][]byte
+}
+
+func (f fakeForge) last(_ context.Context, subject string) (uint64, []byte, error) {
+	for i := len(f.subjects) - 1; i >= 0; i-- {
+		if f.subjects[i] == subject {
+			return uint64(i + 1), f.data[i], nil
+		}
+	}
+	return 0, nil, jetstream.ErrMsgNotFound
+}
+
+func (f fakeForge) next(_ context.Context, subject string, from uint64) (uint64, []byte, error) {
+	for i := int(from) - 1; i < len(f.subjects); i++ {
+		if i >= 0 && f.subjects[i] == subject {
+			return uint64(i + 1), f.data[i], nil
+		}
+	}
+	return 0, nil, jetstream.ErrMsgNotFound
+}
+
+func forgeMerged(t *testing.T, repo string, number int, head, merge string) (string, []byte) {
+	t.Helper()
+	owner, name, _ := strings.Cut(repo, "/")
+	subject, err := forgeMergeSubject(owner, name)
+	if err != nil {
+		t.Fatal(err)
+	}
+	body, err := json.Marshal(sdkdelivery.Forge{V: 1, Kind: sdkdelivery.ForgeMerged, Repository: repo, Branch: "main",
+		Number: number, Head: head, Merge: merge, Root: "t0", Trees: map[string]string{".": "t1"}})
+	if err != nil {
+		t.Fatal(err)
+	}
+	return subject, body
+}
+
+// **A moved module's merge is read from the forge bridge's stream** (sweep 2026-10-30, issue 774): the controller keeps
+// no copy of the forge's merges, so its registration finds the pull request and head of a merge commit on FORGE, the
+// newest first and then every merge the stream keeps; a merge of another repository or commit is never taken for it.
+func TestAMergeIsFoundOnTheForgeBridgesStream(t *testing.T) {
+	var f fakeForge
+	add := func(repo string, number int, head, merge string) {
+		s, b := forgeMerged(t, repo, number, head, merge)
+		f.subjects, f.data = append(f.subjects, s), append(f.data, b)
+	}
+	add("novox/mesh-host", 6, "h6", "c6c6c6c6c6")
+	add("novox/mesh-catalog", 9, "h9", "c7c7c7c7c7")
+	add("novox/mesh-host", 7, "h7", "c7c7c7c7c7")
+	f.subjects, f.data = append(f.subjects, f.subjects[0]), append(f.data, []byte("not a forge message"))
+	add("novox/mesh-host", 8, "h8", "c8c8c8c8c8")
+
+	for name, c := range map[string]struct {
+		repo, commit string
+		number       int
+		found        bool
+	}{
+		"the newest merge":                  {"novox/mesh-host", "c8c8c8c8c8", 8, true},
+		"an older merge, found by scanning": {"novox/mesh-host", "c6c6c6c6c6", 6, true},
+		"a short commit":                    {"novox/mesh-host", "c7c7c7c", 7, true},
+		"a commit of another repository":    {"novox/mesh-catalog", "c6c6c6c6c6", 0, false},
+		"a repository with no merge":        {"novox/hq", "c6c6c6c6c6", 0, false},
+	} {
+		owner, name2, _ := strings.Cut(c.repo, "/")
+		k, found, err := forgeMergeAt(t.Context(), f, owner, name2, c.commit)
+		if err != nil {
+			t.Fatalf("%s: %v", name, err)
+		}
+		if found != c.found || k.Number != c.number {
+			t.Errorf("%s: found %v #%d, want %v #%d", name, found, k.Number, c.found, c.number)
+		}
+		if found && (k.Owner != owner || k.Repo != name2 || k.HeadSHA == "") {
+			t.Errorf("%s: the merge reads as %+v", name, k.SourceMoved)
+		}
+	}
+}

cmd/mesh-controller/loop_own_consumers_test.go

@@ -21,8 +21,13 @@ func holdingOne(names ...string) func(broker.Consumer) (uint64, error) {
 }
 
 func deafObservations(now time.Time, held func(broker.Consumer) (uint64, error)) (string, int) {
+	return deafHeld(now, time.Time{}, held)
+}
+
+// deafHeld is deafObservations with the loop's last hold due at due.
+func deafHeld(now, due time.Time, held func(broker.Consumer) (uint64, error)) (string, int) {
 	f := calm(now)
-	loop, err := readLoop(now.Add(-loopDeafAfter-time.Minute), loopConsumers(), held)
+	loop, err := readLoop(now.Add(-loopDeafAfter-time.Minute), due, loopConsumers(), held)
 	if err != nil {
 		panic(err)
 	}
@@ -65,3 +70,51 @@ func TestDeafLookReadsExactlyTheControllersOwnConsumers(t *testing.T) {
 		}
 	}
 }
+
+// Sweep 2026-10-30 (issue 774): a message the loop held back with a delay longer than the deaf bound is not a deaf
+// controller until it is due and still not taken; the merges consumer's five-minute holds flapped the alarm this way.
+func TestAMessageHeldBackIsNotDeafUntilItIsDue(t *testing.T) {
+	now := time.Now()
+	held := holdingOne("CONTROL/" + broker.ControllerName)
+	for name, c := range map[string]struct {
+		due  time.Time
+		deaf int
+	}{
+		"nothing held":                          {time.Time{}, 1},
+		"held, due in three minutes":            {now.Add(3 * time.Minute), 0},
+		"held, due a moment ago":                {now.Add(-time.Second), 0},
+		"held, due past the deaf bound, unsent": {now.Add(-loopDeafAfter - time.Second), 1},
+	} {
+		if _, n := deafHeld(now, c.due, held); n != c.deaf {
+			t.Errorf("%s: %d deaf observation(s), want %d", name, n, c.deaf)
+		}
+	}
+}
+
+// Sweep 2026-10-30 (issue 774): the controller holds no consumer of the forge's merges any more, and removes the one
+// it held at every assertion.
+func TestTheMergesConsumerIsRetired(t *testing.T) {
+	for _, c := range broker.MeshConsumers() {
+		if c.Name == broker.MergesConsumerName {
+			t.Fatalf("the controller still holds %s on %s", c.Name, c.Stream)
+		}
+	}
+	r := &removed{}
+	if err := broker.AssertMeshConsumers(r); err != nil {
+		t.Fatal(err)
+	}
+	if !r.gone[broker.EventsStream+"/"+broker.MergesConsumerName] {
+		t.Fatalf("the retired merges consumer is not removed: removed %v", r.gone)
+	}
+}
+
+type removed struct{ gone map[string]bool }
+
+func (*removed) EnsureConsumer(broker.Consumer) error { return nil }
+func (r *removed) RemoveConsumer(stream, name string) error {
+	if r.gone == nil {
+		r.gone = map[string]bool{}
+	}
+	r.gone[stream+"/"+name] = true
+	return nil
+}

cmd/mesh-controller/moved.go

@@ -16,6 +16,7 @@ import (
 	sdkdelivery "git.novox.be/novox/mesh-sdk/go/delivery"
 
 	"git.novox.be/novox/mesh-sdk/go/catalogue"
+	"git.novox.be/novox/mesh-sdk/go/process"
 	"github.com/novox/mesh-controller/internal/broker"
 	"github.com/novox/mesh-controller/internal/inventory"
 	"github.com/novox/mesh-controller/internal/link"
@@ -343,64 +344,113 @@ func claimantsOf(entries []inventory.Entry, seat string) []string {
 	return out
 }
 
-// forgeMergeKey is where the forge's announcement of a merge is kept, by the merge commit: the one thing a build of a merge
-// names, from which the pull request and its head are found (novox/hq ADR 0420 §7).
-func forgeMergeKey(owner, repo, commit string) string {
-	return fmt.Sprintf("merge/%s/%s/%s", owner, repo, commit)
-}
-
-// keepForgeMerge keeps the forge's announcement of a merge in the bucket of the merges, a week at most as that bucket
-// keeps them. The controller plans nothing from a merge any more (ADR 0539 §17); this is all it keeps of one.
-var keepForgeMerge = func(ctx context.Context, m link.SourceMoved) error {
-	serving := servingBus.Load()
-	if serving == nil {
-		return fmt.Errorf("%w: the bus is not held", link.ErrTryAgain)
-	}
-	api, err := jetstream.New(serving.Conn())
-	if err != nil {
-		return fmt.Errorf("%w: %w", link.ErrTryAgain, err)
-	}
-	kv, err := api.KeyValue(ctx, broker.DeliveryMergesBucket)
-	if err != nil {
-		return fmt.Errorf("%w: the bucket of the merges: %w", link.ErrTryAgain, err)
-	}
-	body, err := json.Marshal(keptMerge{SourceMoved: m})
-	if err != nil {
-		return err
-	}
-	if _, err := kv.Put(ctx, forgeMergeKey(m.Owner, m.Repo, m.Commit), body); err != nil {
-		return fmt.Errorf("%w: %w", link.ErrTryAgain, err)
-	}
-	return nil
-}
-
-// keptForgeMerge is the forge's announcement of a merge, by its commit; false when none was kept. A variable so a test can
-// hand it one.
+// keptForgeMerge is the forge's word on the merge of a repository at a commit: the pull request and the head it merged,
+// read from the forge bridge's own stream, FORGE, where mesh-delivery-forge-bridge says every merge as
+// `forge.<owner>.<name>.merged` and keeps it a week (novox/hq ADR 0437). False when the stream holds no merge at that
+// commit. A variable so a test can hand it one.
+//
+// **The controller keeps no copy of the forge's merges any more** (sweep 2026-10-30, issue 774). It once kept each in
+// its bucket of merges off a consumer of its own on EVENTS that never gave up a message; one announcement over the
+// bucket's value size held that consumer for a day and queued every merge behind it, and the deaf watchdog read the
+// queue as a deaf controller. The forge bridge's stream is the record of the merges (research 072, 03-domains: the
+// delivery parts own what a merge is); the controller reads it where it needs one, at a moved module's registration.
 var keptForgeMerge = func(ctx context.Context, owner, repo, commit string) (keptMerge, bool, error) {
 	serving := servingBus.Load()
 	if serving == nil {
-		return keptMerge{}, false, errors.New("only the serving controller keeps what the forge announced")
+		return keptMerge{}, false, errors.New("only the serving controller reads the forge's merges")
 	}
 	api, err := jetstream.New(serving.Conn())
 	if err != nil {
 		return keptMerge{}, false, err
 	}
-	kv, err := api.KeyValue(ctx, broker.DeliveryMergesBucket)
+	stream, err := api.Stream(ctx, forgeStream)
+	if err != nil {
+		return keptMerge{}, false, fmt.Errorf("the forge bridge's stream %s cannot be read: %w", forgeStream, err)
+	}
+	return forgeMergeAt(ctx, streamMerges{stream}, owner, repo, commit)
+}
+
+// forgeStream is the forge bridge's stream as the bus names it (its declared name, forge, in capitals).
+var forgeStream = catalogue.StreamBusName(sdkdelivery.ForgeStream)
+
+// forgeMergeSubject is the subject of the forge bridge's merged message for a repository.
+func forgeMergeSubject(owner, repo string) (string, error) {
+	event, err := sdkdelivery.ForgeEvent(owner+"/"+repo, sdkdelivery.ForgeMerged)
+	if err != nil {
+		return "", err
+	}
+	return process.ModuleStreamSubject(sdkdelivery.ForgeBridgeModule, event), nil
+}
+
+// mergeMessages is what forgeMergeAt reads of a stream: the last message on a subject, and the first at or after a
+// sequence. Each answers jetstream.ErrMsgNotFound when there is none.
+type mergeMessages interface {
+	last(ctx context.Context, subject string) (uint64, []byte, error)
+	next(ctx context.Context, subject string, from uint64) (uint64, []byte, error)
+}
+
+type streamMerges struct{ s jetstream.Stream }
+
+func (m streamMerges) last(ctx context.Context, subject string) (uint64, []byte, error) {
+	msg, err := m.s.GetLastMsgForSubject(ctx, subject)
+	if err != nil {
+		return 0, nil, err
+	}
+	return msg.Sequence, msg.Data, nil
+}
+
+func (m streamMerges) next(ctx context.Context, subject string, from uint64) (uint64, []byte, error) {
+	msg, err := m.s.GetMsg(ctx, from, jetstream.WithGetMsgSubject(subject))
+	if err != nil {
+		return 0, nil, err
+	}
+	return msg.Sequence, msg.Data, nil
+}
+
+// forgeMergeAt finds the merged message of owner/repo at commit: the newest first, which is the merge a take-in
+// follows nearly always, then every one the stream keeps, oldest first. A message that does not read as a forge
+// message is passed over.
+func forgeMergeAt(ctx context.Context, msgs mergeMessages, owner, repo, commit string) (keptMerge, bool, error) {
+	subject, err := forgeMergeSubject(owner, repo)
 	if err != nil {
 		return keptMerge{}, false, err
 	}
-	e, err := kv.Get(ctx, forgeMergeKey(owner, repo, commit))
-	if errors.Is(err, jetstream.ErrKeyNotFound) {
+	// Read for the four fields a registration needs, not checked whole (sdkdelivery.DecodeForge): a merged message a
+	// newer bridge writes, or one the SDK's check refuses for a part the controller never reads, still names its pull
+	// request, head and commit.
+	match := func(data []byte) (keptMerge, bool) {
+		var f sdkdelivery.Forge
+		if json.Unmarshal(data, &f) != nil || f.Kind != sdkdelivery.ForgeMerged || f.Number <= 0 || f.Head == "" ||
+			!sameCommitID(f.Merge, commit) {
+			return keptMerge{}, false
+		}
+		return keptMerge{SourceMoved: link.SourceMoved{Owner: owner, Repo: repo, Base: f.Branch, Number: f.Number,
+			HeadSHA: f.Head, Commit: f.Merge}}, true
+	}
+	lastSeq, data, err := msgs.last(ctx, subject)
+	if errors.Is(err, jetstream.ErrMsgNotFound) {
 		return keptMerge{}, false, nil
 	}
 	if err != nil {
 		return keptMerge{}, false, err
 	}
-	var k keptMerge
-	if err := json.Unmarshal(e.Value(), &k); err != nil {
-		return keptMerge{}, false, err
+	if k, ok := match(data); ok {
+		return k, true, nil
 	}
-	return k, true, nil
+	for from := uint64(1); from < lastSeq; {
+		seq, data, err := msgs.next(ctx, subject, from)
+		if errors.Is(err, jetstream.ErrMsgNotFound) || (err == nil && seq >= lastSeq) {
+			return keptMerge{}, false, nil
+		}
+		if err != nil {
+			return keptMerge{}, false, err
+		}
+		if k, ok := match(data); ok {
+			return k, true, nil
+		}
+		from = seq + 1
+	}
+	return keptMerge{}, false, nil
 }
 
 // keptMerge is a merge as the record keeps it: the forge's announcement.

cmd/mesh-controller/moved_bus_test.go

@@ -99,17 +99,9 @@ func TestAModuleBuiltFromANewRepositoryIsRegisteredOnlyOnTheOperatorsApproveOnTh
 				return err == nil && kept
 			})
 
-			// The forge's merge of that pull request, as the controller heard it, and the build it asked for.
+			// The forge bridge's merge of that pull request on its stream, and the build it asked for.
 			const commit = "c0ffee0123456789"
-			event, _ := json.Marshal(map[string]any{"owner": "novox", "repo": "mesh-host", "base": "main", "number": 7,
-				"head_sha": a.merge.HeadSHA, "merge_commit_sha": commit})
-			var forgeMerge link.SourceMoved
-			if err := json.Unmarshal(event, &forgeMerge); err != nil {
-				t.Fatal(err)
-			}
-			if err := keepForgeMerge(ctx, forgeMerge); err != nil {
-				t.Fatal(err)
-			}
+			sayForgeMerge(ctx, t, js, "novox/mesh-host", 7, a.merge.HeadSHA, commit)
 			id := fmt.Sprintf("build-%d", time.Now().Add(time.Hour).UnixNano())
 			if err := inv.RecordBuildRequest(ctx, inventory.BuildRequest{ID: id, Repository: "novox/mesh-host", Seat: "git",
 				Path: "modules/sudo", Ref: "main", Commit: commit, For: "merge"}); err != nil {

cmd/mesh-controller/new_module_bus_test.go

@@ -100,17 +100,9 @@ func TestANewModuleFromANewRepositoryIsRegisteredOnlyOnTheOperatorsApproveOnTheB
 				return err == nil && kept
 			})
 
-			// The forge's merge of that pull request, as the controller heard it, and the build it asked for.
+			// The forge bridge's merge of that pull request on its stream, and the build it asked for.
 			const commit = "c0ffee0123456789"
-			event, _ := json.Marshal(map[string]any{"owner": "novox", "repo": "mesh-delivery", "base": "main", "number": 7,
-				"head_sha": a.merge.HeadSHA, "merge_commit_sha": commit})
-			var forgeMerge link.SourceMoved
-			if err := json.Unmarshal(event, &forgeMerge); err != nil {
-				t.Fatal(err)
-			}
-			if err := keepForgeMerge(ctx, forgeMerge); err != nil {
-				t.Fatal(err)
-			}
+			sayForgeMerge(ctx, t, js, "novox/mesh-delivery", 7, a.merge.HeadSHA, commit)
 			id := fmt.Sprintf("build-%d", time.Now().Add(time.Hour).UnixNano())
 			if err := inv.RecordBuildRequest(ctx, inventory.BuildRequest{ID: id, Repository: "novox/mesh-delivery", Seat: "git",
 				Path: "modules/mesh-delivery-view", Ref: "main", Commit: commit, For: "merge"}); err != nil {

cmd/mesh-controller/new_module_on_merge_test.go

@@ -11,7 +11,6 @@ import (
 	"git.novox.be/novox/mesh-sdk/go/catalogue"
 	sdkdelivery "git.novox.be/novox/mesh-sdk/go/delivery"
 	"github.com/novox/mesh-controller/internal/inventory"
-	"github.com/novox/mesh-controller/internal/link"
 )
 
 // ADR 0501 §6 (issue 1851, A5): the live case of 2026-10-07 (novox/hq issue 300), on keys. A merge of the catalogue adds
@@ -33,12 +32,6 @@ func TestAMergeAddingAModuleEndsRegisteredFromItsKeyAndAsksNoBuild(t *testing.T)
 	watchNewModules(watching, open)
 
 	const commit = "3da80a4b00000000"
-	m := link.SourceMoved{Owner: "novox", Repo: "mesh-catalog", Base: "main", Commit: commit,
-		Paths:      []string{"modules/systemd-resolved/module.json", "modules/systemd-resolved/cmd/main.go"},
-		ModuleDirs: []string{"modules/systemd-resolved"}, ModuleDirsSaid: true}
-	if err := (following{open: open}).SourceMoved(ctx, m); err != nil {
-		t.Fatal(err)
-	}
 	// The indexer writes the module's trunk value; the builder builds it, then its key is done.
 	fp := fpOf('7')
 	manifest := b.indexed(t, "systemd-resolved", "1", "novox/mesh-catalog", "modules/systemd-resolved", commit, fp)

cmd/mesh-controller/signals.go

@@ -284,13 +284,17 @@ func watchLoop(f *signalFacts) []conditions.Observation {
 	if since.IsZero() {
 		since = f.started
 	}
+	// A message the loop held back waits by the loop's own choice until it is due: deafness is counted from then.
+	if f.loop.due.After(since) {
+		since = f.loop.due
+	}
 	if f.now.Sub(since) <= loopDeafAfter {
 		return nil
 	}
 	return []conditions.Observation{{Scope: conditions.ScopeCore, ID: "controller", Kind: "controller-deaf",
 		Token: "deaf", Machine: f.host, Severity: conditions.Urgent,
 		Summary: fmt.Sprintf("the controller's event loop has taken nothing for %s while its consumers hold %d "+
-			"message(s): reports, builds and merges are not being acted on", ago(f.now.Sub(since)), f.loop.pending),
+			"message(s): reports and events are not being acted on", ago(f.now.Sub(since)), f.loop.pending),
 		Said: fmt.Sprintf("%d pending (%s), last taken %s", f.loop.pending, f.loop.where, since.UTC().Format(time.RFC3339))}}
 }
 

cmd/mesh-controller/upgrades.go

@@ -93,15 +93,6 @@ func (f following) Announceable(ctx context.Context) ([]link.Announcement, error
 	return out, nil
 }
 
-// SourceMoved is the forge announcing a merge. It is put into the open batch (novox/hq ADR 0276), which
-// becomes one walk when its merge window closes: hearMerge, and cutBatchesHeld in batches.go.
-func (f following) SourceMoved(ctx context.Context, m link.SourceMoved) error {
-	// A merge plans nothing here any more: mesh-delivery merges on the Approve, the indexer writes the fingerprints and
-	// the builder builds them (ADR 0539 §5, §17). The controller keeps the announcement, for the build of a merge that
-	// moves a module between repositories to be shown the operator's Approve (ADR 0420 §7).
-	return keepForgeMerge(ctx, m)
-}
-
 // actingOnMerges keeps one merge acted on at a time (novox/hq issue 266).
 var actingOnMerges sync.Mutex
 

cmd/mesh-controller/watchdogs.go

@@ -147,7 +147,9 @@ type machineFacts struct {
 func (m machineFacts) asleep() bool { return m.power.Away() }
 
 type loopFacts struct {
-	took    time.Time
+	took time.Time
+	// due is when a message the loop held back is handed over again (link.Loop.Due): the loop is not deaf before it.
+	due     time.Time
 	pending uint64
 	where   string
 }
@@ -458,7 +460,7 @@ func (w *watchdogs) gatherLoop() (loopFacts, error) {
 	if w.js == nil {
 		return loopFacts{took: link.Loop.Last()}, errors.New("this controller is not on the bus")
 	}
-	return readLoop(link.Loop.Last(), loopConsumers(), func(c broker.Consumer) (uint64, error) {
+	return readLoop(link.Loop.Last(), link.Loop.Due(), loopConsumers(), func(c broker.Consumer) (uint64, error) {
 		info, err := w.js.Context().ConsumerInfo(c.Stream, c.Name)
 		if err != nil {
 			return 0, err
@@ -468,8 +470,8 @@ func (w *watchdogs) gatherLoop() (loopFacts, error) {
 }
 
 // readLoop sums what the given consumers hold, as held reads each.
-func readLoop(took time.Time, consumers []broker.Consumer, held func(broker.Consumer) (uint64, error)) (loopFacts, error) {
-	f := loopFacts{took: took}
+func readLoop(took, due time.Time, consumers []broker.Consumer, held func(broker.Consumer) (uint64, error)) (loopFacts, error) {
+	f := loopFacts{took: took, due: due}
 	var where []string
 	for _, c := range consumers {
 		n, err := held(c)