diff --git a/.pql/changelog/ticket_history/2026-05.sql b/.pql/changelog/ticket_history/2026-05.sql
index cdd3ea03..1a8ad9a0 100644
--- a/.pql/changelog/ticket_history/2026-05.sql
+++ b/.pql/changelog/ticket_history/2026-05.sql
@@ -2218,3 +2218,4 @@ INSERT INTO ticket_history (ticket_id, field, old_value, new_value, changed_by,
 INSERT INTO ticket_history (ticket_id, field, old_value, new_value, changed_by, changed_at, created_at, updated_at, deleted_at, hash, canonical_version) VALUES ('T-148', 'status', 'in_progress', 'done', NULL, '2026-05-23 15:05:29', '2026-05-23 15:05:29', '2026-05-23 15:05:29', NULL, 'd9d9e4c96d94060f929c7c09935d127c', 1) ON CONFLICT(hash) DO NOTHING;
 INSERT INTO ticket_history (ticket_id, field, old_value, new_value, changed_by, changed_at, created_at, updated_at, deleted_at, hash, canonical_version) VALUES ('T-141', 'status', 'in_progress', 'done', NULL, '2026-05-23 20:49:44', '2026-05-23 20:49:44', '2026-05-23 20:49:44', NULL, 'fb2405478b0d422d39a924ccedec5022', 1) ON CONFLICT(hash) DO NOTHING;
 INSERT INTO ticket_history (ticket_id, field, old_value, new_value, changed_by, changed_at, created_at, updated_at, deleted_at, hash, canonical_version) VALUES ('T-157', 'status', 'backlog', 'in_progress', NULL, '2026-05-23 20:52:47', '2026-05-23 20:52:47', '2026-05-23 20:52:47', NULL, 'b2b31ab5fe70fb5027773775b0945bd5', 1) ON CONFLICT(hash) DO NOTHING;
+INSERT INTO ticket_history (ticket_id, field, old_value, new_value, changed_by, changed_at, created_at, updated_at, deleted_at, hash, canonical_version) VALUES ('T-157', 'status', 'in_progress', 'done', NULL, '2026-05-23 20:57:07', '2026-05-23 20:57:07', '2026-05-23 20:57:07', NULL, 'ce114090979d31512a9aa09f1c9311a1', 1) ON CONFLICT(hash) DO NOTHING;
diff --git a/.pql/changelog/tickets/2026-05.sql b/.pql/changelog/tickets/2026-05.sql
index 663b1883..50d7a4ad 100644
--- a/.pql/changelog/tickets/2026-05.sql
+++ b/.pql/changelog/tickets/2026-05.sql
@@ -2657,3 +2657,5 @@ Team-wide:
 Acceptance: roster matches list-panes/config; each row mirrors the member''s model + accept-edits/plan badge + context-usage; status verb and token deltas update live; account budget refreshes on its timer; panel appears only when a team is active. Depends on T-145 (status source) + T-139 (done).
 ', 'done', 'medium', NULL, NULL, NULL, '2026-05-22 15:59:34', '2026-05-23 20:49:44', NULL, 'c9e79b9986f436abadba095d77d540f7', 1) ON CONFLICT(id) DO UPDATE SET type=excluded.type, parent_id=excluded.parent_id, title=excluded.title, description=excluded.description, status=excluded.status, priority=excluded.priority, assigned_to=excluded.assigned_to, team=excluded.team, decision_ref=excluded.decision_ref, updated_at=excluded.updated_at, deleted_at=excluded.deleted_at, hash=excluded.hash, canonical_version=excluded.canonical_version WHERE excluded.updated_at > tickets.updated_at OR (excluded.updated_at = tickets.updated_at AND excluded.hash > tickets.hash);
 INSERT INTO tickets (id, type, parent_id, title, description, status, priority, assigned_to, team, decision_ref, created_at, updated_at, deleted_at, hash, canonical_version) VALUES ('T-157', 'task', 'T-132', 'Team sidebar: live per-member status (mode + context)', 'Extend the Claude meta sidebar (T-141) roster rows with each teammate''s LIVE status — permission-mode badge (default/accept-edits/plan/bypass) and context-token usage — mirroring the per-session strip (T-145/T-150). The data exists: TeamObserver creates a TranscriptPublisher per teammate whose statusStream emits SessionStatus, but it is NEVER published to the MessageBus. Wire it: in team_observer _joined, subscribe to the publisher''s statusStream and publish {agentId, model, permissionMode, contextTokens} to a new ClaudeConversation.memberStatusChannel; cancel on _left. The sidebar subscribes to that channel and updates the matching roster row. Do NOT re-tail transcripts (D-75) — reuse the existing stream. Acceptance: a running team shows each member''s mode badge + context tokens, updating live; module is the single status-forwarding point; tests; coverage >= floor.', 'in_progress', 'low', NULL, NULL, NULL, '2026-05-23 20:48:31', '2026-05-23 20:52:47', NULL, '386818f67d3cbcc1a1b7a528c2baaca1', 1) ON CONFLICT(id) DO UPDATE SET type=excluded.type, parent_id=excluded.parent_id, title=excluded.title, description=excluded.description, status=excluded.status, priority=excluded.priority, assigned_to=excluded.assigned_to, team=excluded.team, decision_ref=excluded.decision_ref, updated_at=excluded.updated_at, deleted_at=excluded.deleted_at, hash=excluded.hash, canonical_version=excluded.canonical_version WHERE excluded.updated_at > tickets.updated_at OR (excluded.updated_at = tickets.updated_at AND excluded.hash > tickets.hash);
+INSERT INTO tickets (id, type, parent_id, title, description, status, priority, assigned_to, team, decision_ref, created_at, updated_at, deleted_at, hash, canonical_version) VALUES ('T-157', 'task', 'T-132', 'Team sidebar: live per-member status (mode + context)', 'Extend the Claude meta sidebar (T-141) roster rows with each teammate''s LIVE status — permission-mode badge (default/accept-edits/plan/bypass) and context-token usage — mirroring the per-session strip (T-145/T-150). The data exists: TeamObserver creates a TranscriptPublisher per teammate whose statusStream emits SessionStatus, but it is NEVER published to the MessageBus. Wire it: in team_observer _joined, subscribe to the publisher''s statusStream and publish {agentId, model, permissionMode, contextTokens} to a new ClaudeConversation.memberStatusChannel; cancel on _left. The sidebar subscribes to that channel and updates the matching roster row. Do NOT re-tail transcripts (D-75) — reuse the existing stream. Acceptance: a running team shows each member''s mode badge + context tokens, updating live; module is the single status-forwarding point; tests; coverage >= floor.', 'done', 'low', NULL, NULL, NULL, '2026-05-23 20:48:31', '2026-05-23 20:57:07', NULL, '6fd17798d24f81a3f81f284c7bd595e2', 1) ON CONFLICT(id) DO UPDATE SET type=excluded.type, parent_id=excluded.parent_id, title=excluded.title, description=excluded.description, status=excluded.status, priority=excluded.priority, assigned_to=excluded.assigned_to, team=excluded.team, decision_ref=excluded.decision_ref, updated_at=excluded.updated_at, deleted_at=excluded.deleted_at, hash=excluded.hash, canonical_version=excluded.canonical_version WHERE excluded.updated_at > tickets.updated_at OR (excluded.updated_at = tickets.updated_at AND excluded.hash > tickets.hash);
+INSERT INTO tickets (id, type, parent_id, title, description, status, priority, assigned_to, team, decision_ref, created_at, updated_at, deleted_at, hash, canonical_version) VALUES ('T-159', 'bug', 'T-132', 'ClidePane convey notifies focus listeners during build (markNeedsBuild crash)', 'Found via make run (2026-05-24). ClidePane.didChangeDependencies/didUpdateWidget run during the build phase and call FocusTracker.setStatusWidget -> notifyListeners() synchronously, which rebuilds the focus-listening status-bar item (PaneContextStatusItem''s ListenableBuilder) mid-build -> ''setState()/markNeedsBuild() called during build'' (thrown repeatedly each frame). Introduced by T-150; the T-150 widget tests missed it because no focus listener was in their tree. Fix: ClidePane defers the convey to a post-frame callback when schedulerPhase == persistentCallbacks (mid-build), re-checking focus then; immediate otherwise. Regression test added with a PaneContextStatusItem in the tree while a ClidePane mounts focused.', 'backlog', 'high', NULL, NULL, NULL, '2026-05-24 08:53:13', '2026-05-24 08:53:13', NULL, '52caaaca78b7c2bf6cae907fcf0fcdae', 1) ON CONFLICT(id) DO UPDATE SET type=excluded.type, parent_id=excluded.parent_id, title=excluded.title, description=excluded.description, status=excluded.status, priority=excluded.priority, assigned_to=excluded.assigned_to, team=excluded.team, decision_ref=excluded.decision_ref, updated_at=excluded.updated_at, deleted_at=excluded.deleted_at, hash=excluded.hash, canonical_version=excluded.canonical_version WHERE excluded.updated_at > tickets.updated_at OR (excluded.updated_at = tickets.updated_at AND excluded.hash > tickets.hash);
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4593a47d..f6ae72ed 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -145,6 +145,10 @@ heading, and (b) bumping `pubspec.yaml` `version:` in the same commit.
 
 ### Fixed
 
+- Claude pane no longer floods the console with "markNeedsBuild called
+  during build" (T-159) — a focused pane surfacing its status-bar widget
+  now defers the notification out of the build phase instead of rebuilding
+  the status item mid-build.
 - The git / tickets / decisions / pql / problems tabs no longer log
   `i18n: namespace not registered` on boot (T-155). An extension's
   localized tab title is now loaded automatically on activation, and the
diff --git a/lib/widgets/src/clide_pane.dart b/lib/widgets/src/clide_pane.dart
index 4a42abfe..7a1ba703 100644
--- a/lib/widgets/src/clide_pane.dart
+++ b/lib/widgets/src/clide_pane.dart
@@ -12,6 +12,7 @@ library;
 
 import 'package:clide/kernel/src/facade.dart';
 import 'package:clide/kernel/src/focus.dart';
+import 'package:flutter/scheduler.dart';
 import 'package:flutter/widgets.dart';
 
 class ClidePane extends StatefulWidget {
@@ -68,12 +69,33 @@ class _ClidePaneState extends State<ClidePane> {
   // notifies (→ _sync again), but the identical-widget guard there makes
   // the second pass a no-op.
   void _sync() {
-    if (_shown) _focus?.setStatusWidget(widget.contributionId, widget.statusWidget);
+    if (_shown) _convey(widget.statusWidget);
+  }
+
+  // Push [w] to the focus tracker's status slot. setStatusWidget notifies
+  // focus listeners (the status-bar item rebuilds) — but didChangeDependencies
+  // and didUpdateWidget run during the build phase, where a synchronous notify
+  // would markNeedsBuild-during-build. So defer the convey to after the frame
+  // when we're mid-build, and re-check focus then (it may have moved).
+  void _convey(Widget? w) {
+    final focus = _focus;
+    if (focus == null) return;
+    void apply() {
+      if (focus.activeContributionId == widget.contributionId) {
+        focus.setStatusWidget(widget.contributionId, w);
+      }
+    }
+
+    if (SchedulerBinding.instance.schedulerPhase == SchedulerPhase.persistentCallbacks) {
+      WidgetsBinding.instance.addPostFrameCallback((_) => apply());
+    } else {
+      apply();
+    }
   }
 
   @override
   void dispose() {
-    if (_shown) _focus?.setStatusWidget(widget.contributionId, null);
+    if (_shown) _convey(null);
     _focus?.removeListener(_sync);
     super.dispose();
   }
diff --git a/test/widgets/src/clide_pane_test.dart b/test/widgets/src/clide_pane_test.dart
index 3df6f6f0..08f132bc 100644
--- a/test/widgets/src/clide_pane_test.dart
+++ b/test/widgets/src/clide_pane_test.dart
@@ -2,6 +2,7 @@
 /// FocusTracker slot only while it is the shown (focused + active) pane.
 library;
 
+import 'package:clide/builtin/claude/src/pane_context_status.dart';
 import 'package:clide/kernel/src/panels/slot_id.dart';
 import 'package:clide/widgets/widgets.dart';
 import 'package:flutter/widgets.dart';
@@ -36,6 +37,30 @@ void main() {
     expect(focus.activeStatusWidget, isNull); // focus moved away → cleared
   });
 
+  testWidgets('mounting while focused does not notify focus listeners during build', (tester) async {
+    // Regression: ClidePane.didChangeDependencies runs during the build phase,
+    // and conveying synchronously rebuilt the focus-listening status item
+    // mid-build ("markNeedsBuild during build"). A focus listener must be in
+    // the tree to reproduce it.
+    f.services.focus.setActive(slot: Slots.workspace, contributionId: 'pane.x');
+    await tester.pumpWidget(harness(
+      f,
+      const Column(
+        children: [
+          PaneContextStatusItem(),
+          ClidePane(
+            contributionId: 'pane.x',
+            statusWidget: Text('S', textDirection: TextDirection.ltr),
+            child: SizedBox(),
+          ),
+        ],
+      ),
+    ));
+    await tester.pump(); // run the deferred post-frame convey
+    expect(tester.takeException(), isNull);
+    expect(f.services.focus.activeStatusWidget, isA<Text>());
+  });
+
   testWidgets('an inactive pane never conveys', (tester) async {
     await tester.pumpWidget(harness(
       f,