docs(changelog): v2.6.8-agent-attribution

CHANGELOG + roadmap shipped record (through v2.6.8) + openspec v2-6 Phase 1-UX checked off (U.1-U.6; Smoke U pending the frontend Docker rebuild).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

openspec/changes/v2-6-persistent-agent-sessions/tasks.md

@@ -29,20 +29,16 @@ ACP follows; hardening last.
 - [x] P1.5-a **Per-session SSE** (`v2.6.2-delete-guard-and-sse`): one `event.subscribe({directory})` per live opencode session, each with an `AbortController`; `sessionID` demux guard + zombie-loop fix — replaces task 1.3's single global loop. Bundled: session-delete work-loss guard (`/worktree-risk`).
 - [x] P1.5-b **Re-key `agent_sessions` → `(chat_id, agent)`** + first-class `worktrees` table (`v2.6.3-chatkey-and-skills`); `tasks.chat_id` threaded; `runOpenCodeServerTask` resolve-or-creates a chat for session-less creators; cross-chunk dcp-strip. FK convergence to `SET NULL` (`v2.6.4-agent-sessions-fk`).
 
-## Phase 1 (UX) — Attribution & switch affordances (design §9) — ⬜ REMAINING (pure read+display over already-shipped `pending_changes.agent` + `agent_sessions`)
+## Phase 1 (UX) — Attribution & switch affordances (design §9) — ✅ SHIPPED `v2.6.8-agent-attribution` (Smoke U pending live frontend deploy)
 
-- [ ] U.1 Stamp `pending_changes.agent` at queue time (worktree path → task agent;
-      native write tools → `'boocode'`; manual RightRail create → NULL).
-- [ ] U.2 Add `agent` to `listPending` response + frontend `PendingChange` type.
-- [ ] U.3 Extract `providerIcon()` to a shared helper; DiffPanel renders an agent badge
-      per row + a "Changes from X, Y" note when the pending set spans >1 agent (§9a).
-- [ ] U.4 `GET /api/sessions/:id/agent-sessions` route + `api.coder.agentSessions` +
-      `useAgentSessions(sessionId)` (refetch on `message_complete`) (§9b).
-- [ ] U.5 `AgentComposerBar` optional `sessionId` prop → resumed / history / new-session
-      chip beside the Provider picker; hidden on fresh chats and other callers (§9b).
-- [ ] U.6 Consume opencode `session.next.step.ended` `{tokens, cost}` → fill ctx/token usage for opencode sessions (SDK already installed; closes the "no usage for external agents" gap; surface beside the §9b chip). Source: `boocode_code_review_v2.md` §1 #8, design §10.
+- [x] U.1 Stamp `pending_changes.agent` at queue time — native tools default `'boocode'`, dispatched external → `task.agent`, manual RightRail → `NULL` (`pending_changes.ts`, `dispatcher.ts`).
+- [x] U.2 `agent` flows through `listPending` + backend & frontend `PendingChange` types.
+- [x] U.3 Shared `components/coder/providerIcons.tsx`; DiffPanel per-row agent badge + "Changes from X, Y" multi-agent note (§9a).
+- [x] U.4 `GET /api/sessions/:id/agent-sessions` route + `api.coder.agentSessions` + `useAgentSessions` hook (refetch on message-complete) (§9b).
+- [x] U.5 `AgentComposerBar` optional `sessionId` prop → resumed/history/new-session chip; hidden on fresh chats + other callers (§9b).
+- [x] U.6 Consume opencode `session.next.step.ended` → accumulate `input_tokens`/`output_tokens`/`cost` on `agent_sessions` (new cols). Backend persist only; UI surfacing deferred.
 - [ ] **Smoke U:** stage edits with opencode then boocode → DiffPanel badges each row to the
-      right agent; composer shows "resumed" when re-selecting opencode, "new session" for goose.
+      right agent; composer shows "resumed" when re-selecting opencode, "new session" for goose. *(pending live frontend deploy — Docker container rebuild)*
 
 ## Phase 2 — Warm ACP backend (goose, qwen) — ⬜ REMAINING
 
@@ -102,7 +98,7 @@ ACP follows; hardening last.
 ## Remaining — recommended order (implementation plan, 2026-05-31)
 
 1. ~~**F.1 interrupt-bug fix**~~ — ✅ shipped `v2.6.7-interrupt-guard` (3 regression tests, TDD).
-2. **Phase 1-UX** (U.1–U.6) — pure read+display over already-shipped `pending_changes.agent` + `agent_sessions`; no dispatch-logic or backend change, so it ships value on data that already exists. U.6 (token/ctx usage) rides the same opencode SSE.
+2. ~~**Phase 1-UX** (U.1–U.6)~~ — ✅ shipped `v2.6.8-agent-attribution` (3 parallel agents, disjoint files; 9 new tests). Smoke U pending the frontend Docker rebuild.
 3. **Phase 2 — warm ACP, qwen first then goose** — qwen has a validated `--acp` reference; goose's missing resume is the open design question, so qwen de-risks the pattern. Smoke 2 + 2b (the switch round-trip success criterion).
 4. **Phase 3 — lifecycle hardening** — lift openchamber's state machine; do crash-recovery (3.1/3.2/3.6) + worktree reaper (3.3/3.4 + LRU) together (shared supervision loop). Closes the two ⬜ success criteria (server-crash recovery, close→cleanup).
 5. **Tests T.1–T.3 + `BOOCODER.md` (D.1 remainder)** — backfill alongside each phase, not at the end.