diff --git a/.pql/changelog/ticket_history/2026-06.sql b/.pql/changelog/ticket_history/2026-06.sql
index 02f6fc97..dc607c21 100644
--- a/.pql/changelog/ticket_history/2026-06.sql
+++ b/.pql/changelog/ticket_history/2026-06.sql
@@ -781,3 +781,4 @@ INSERT INTO ticket_history (ticket_id, field, old_value, new_value, changed_by,
 
 **Keyboard / a11y:** Full keyboard support — Alt+mnemonic opens a menu, arrow-key navigation within, Enter activates, Esc / click-away closes. Must meet the a11y contract (keyboard nav + semantics).', NULL, '2026-06-07 10:43:22', '2026-06-07 10:43:22', '2026-06-07 10:43:22', NULL, '24d0f8f4ae04e75128f681498c24374f', 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-48', 'status', 'ready', 'done', NULL, '2026-06-07 15:40:06', '2026-06-07 15:40:06', '2026-06-07 15:40:06', NULL, '82f49dda57f70efe965735d4207d1d2c', 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-267', 'status', 'backlog', 'ready', NULL, '2026-06-07 16:25:28', '2026-06-07 16:25:28', '2026-06-07 16:25:28', NULL, 'f89b4bd8614ca3f405f7f888e789d56a', 1) ON CONFLICT(hash) DO NOTHING;
diff --git a/.pql/changelog/tickets/2026-06.sql b/.pql/changelog/tickets/2026-06.sql
index 75bdd1b1..cd705c63 100644
--- a/.pql/changelog/tickets/2026-06.sql
+++ b/.pql/changelog/tickets/2026-06.sql
@@ -1650,3 +1650,12 @@ INSERT INTO tickets (id, type, parent_id, title, description, status, priority,
 **Context behavior:** Items reflect the focused surface; inapplicable items render disabled (greyed), not hidden. Mainly exercised once Edit/Selection land, but View/File items honor it too where relevant.
 
 **Keyboard / a11y:** Full keyboard support — Alt+mnemonic opens a menu, arrow-key navigation within, Enter activates, Esc / click-away closes. Must meet the a11y contract (keyboard nav + semantics).', 'done', 'medium', NULL, NULL, NULL, '2026-04-23 20:30:09', '2026-06-07 15:40:06', NULL, 'be3c4df9b99ea7da3b0a1b856f944ba5', 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-267', 'epic', NULL, 'Conversation rendering streamlining — fold, attribute, contain', 'Home for the cohesive set of work that streamlines how the Claude conversation log renders, so a heavy agent turn reads clearly and nothing is mislabeled or duplicated. Three recurring moves bind these tickets: (1) FOLD a redundant standalone item into its owning card (success result → tool card; agent prompt → agent card); (2) fix MISLEADING ATTRIBUTION (sub-agent prompt shown as "you"; sub-agent prose shown as "claude"); (3) settle the CONTAINER / interaction model (holder card that contains sub-cards, nested agent run, autoscroll-vs-reach-the-control).
+
+Common substrate across the children: the flat ConversationItem list and its renderers in lib/builtin/claude/src/conversation_view.dart, the pure grouping pass in activity_cluster.dart, the ConversationCard template in conversation_card.dart, and the so-far-unused ConversationItem.isSidechain / parentUuid transcript fields (transcript_reader.dart).
+
+Children: T-262 (merge tool-call + success result into one card with header status check), T-263 (fold sub-agent prompt into the Agent card; relabel you → agent prompt), T-264 (nest the whole sub-agent run under its Agent card via parentUuid), T-265 (relabel sidechain assistant prose/thinking — agent, not claude), T-266 (restyle activity/holder card as a container of sub-cards + fix the collapse-control scroll race). Sequencing: T-262/T-263 first, T-264/T-265 build the sidechain story, T-266 settles the shared container model last.
+
+Refs: D-78 (interaction zone / display-only conversation widgets). Built on T-168 (per-tool body rendering) and T-230 (activity card).
+
+SEQUENCING UPDATE (after T-266 refinement): the shared container/holder primitive now lives in T-266 and is CONSUMED by T-264 (nested agent run), so T-266 is no longer "last" — its primitive lands before/with T-264. T-264 is now blocked by T-266. Revised order: T-262 / T-263 (fold success result, fold agent prompt) → T-266 (shared holder/container primitive + activity-card restyle) → T-264 (nest the whole agent run on that primitive) → T-265 (relabel sidechain prose) can land anytime alongside.', 'ready', 'medium', NULL, NULL, 'D-78', '2026-06-07 08:42:53', '2026-06-07 16:25:28', NULL, '5c603f0a4c444f398ec3c285d728ffcc', 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 a1d55da1..161ddc62 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -18,13 +18,11 @@ heading, and (b) bumping `pubspec.yaml` `version:` in the same commit.
 
 ### Added
 
-- A Zed-style **application menu bar** in the hat — **File**, **View**, and
-  **Help** menus built from custom widgets (no native menu, D-7). Items are
-  pulled from the command registry with their keybindings shown inline;
-  unplaced `view.*` commands auto-fill the View menu. Full keyboard support:
-  `Alt`+mnemonic opens a menu, arrows navigate, Enter activates, Esc closes.
-  Help → About shows version + bundled licenses. `Ctrl+O` (Open Folder) and
-  `Ctrl+Shift+N` (New Window) are now real keybindings. (T-48)
+- A Zed-style **application menu bar** in the hat — **File / View / Help**
+  menus built from custom widgets (no native menu, D-7), populated from the
+  command registry with inline keybindings. Full keyboard nav (`Alt`+mnemonic,
+  arrows, Enter, Esc). Help → About shows version + bundled licenses. `Ctrl+O`
+  and `Ctrl+Shift+N` are now real keybindings. (T-48)
 - The sidebar/dock **filter boxes are now CLI-addressable** (D-6 parity): `clide
   ui filter <address> <text>` drives a pane's filter as typing would, and `clide
   ui filter <address>` reads it back. Addresses are box ids from `clide pane