qa(R8): re-confirm F-RACE-001 live (race -> 1 session, loser joins same set) + prune

Round 8 chunk 1. Simultaneous mood-tap on both emulators -> exactly 1 active session
(was 2 pre-fix); race-loser hit WaitingForPartner -> "Join the game" -> joined the
winner's session at the same Q1 (shared reveal preserved). Regression smoke clean:
no FATAL, game opens both devices, inbox loads, messages + date_swipes ciphertext at
rest. F-RACE-001 pruned to the archived-ID line per report hygiene; 0 open P0-P3.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

ClaudeQACoverage.md

@@ -71,7 +71,7 @@ Full live two-device run (games + messages):
 - **Deferred (Round 8):** the full 17-type × {fg/bg/killed} matrix isn't exhaustively run live — remaining types are routing-code-verified + centralized in `PartnerNotificationType`; date_match push verified live. New types added to the plan's Pass E inventory (`join_game`, `partner_joined_game`, `game_ended`, `date_plan_update`, etc.) = **todo**.
 
 ## Pass F — Resilience / lifecycle / concurrency / time
-- **Concurrency race:** F-RACE-001 (P1) found + **fixed** (atomic transactional create on per-couple `sessions/_active` pointer) + **verified live** (parallel-tap race → 1 session, was 2). *Pending one confirmation round, then prune.*
+- **Concurrency race:** F-RACE-001 (P1) fixed + **re-confirmed live (R8):** simultaneous mood-tap on both devices → **1 session** (was 2); race-loser landed on WaitingForPartner → **"Join the game"** → joined the winner's session at the **same Q1** (shared reveal preserved). Archived. *(Minor pre-existing note: loser can alternatively land on Play hub; not seen this run.)*
 - **Offline:** airplane mode → Today renders from cache, no crash.
 - **Lifecycle:** rotation/config-change → state preserved; ~6 cold restarts → clean to Home (auth persists).
 - **Robustness:** malformed/abusive deep-link intents (unknown type, missing extras, injection/path-traversal) → 0 crash; killed-state cold-start chat deep-link → conversation loads.

ClaudeReport.md

@@ -6,8 +6,8 @@
 > to the archived-ID line below (full detail stays in git history). See **Report hygiene** in `ClaudeQAPlan.md`.
 
 ## Run-state (current)
-`Round 7 (multi-angle deep dive) — COMPLETE | 0 open P0–P3 | NEXT ACTION: Round 8 re-QA — confirm F-RACE-001, then prune it; run Passes I/J live.`
-- **Build:** client HEAD `23dd6a7` (includes the F-RACE-001 fix, verified live), Cloud Functions deployed.
+`Round 8 (re-QA + Passes I/J) — IN PROGRESS | 0 open P0–P3 | F-RACE-001 re-confirmed + pruned | NEXT ACTION: Pass I (performance), then Pass J (a11y).`
+- **Build:** client HEAD `23dd6a7`, Cloud Functions deployed.
 - **Devices / accounts:** emulator-5554 = QA (`Y05AKO2IlTPMa0JQW1BiNIM0uzK2`) · emulator-5556 = Sam (`imDjjO…`) · paired, coupleId `Xal3Kw3gjSdn0niERYKJ`, both free (baseline restored).
 - **Docs:** Playbook `ClaudeQAPlan.md` · Coverage `ClaudeQACoverage.md` · Ideas `Future.md` `## QA` · Branding `ClaudeBrandingReview.md`.
 
@@ -15,20 +15,15 @@
 | Severity | Open | Fixed (pending 1 confirm) |
 |---|---|---|
 | P0 | 0 | 0 |
-| P1 | 0 | 1 (F-RACE-001) |
+| P1 | 0 | 0 |
 | P2 | 0 | 0 |
 | P3 | 0 | 0 |
 
 ## Open issues
 **None.**
 
-## Fixed this round — pending one confirmation round (then prune)
-| ID | Severity | Area | Description | Fix | Status |
-|---|---|---|---|---|---|
-| F-RACE-001 | P1 | Games / concurrency | Both partners starting the *same* game within ~1s created **2 divergent active sessions** (different question sets) → no shared reveal; core loop silently defeated. Non-transactional check-then-create in `GameSessionManager.startGameWithCouple`. | Atomic Firestore transaction on a per-couple pointer `couples/{cid}/sessions/_active` (`startSessionAtomically`): reads pointer → `AlreadyActive`→join, else atomically sets session + re-points lock. All 7 games funnel through it. Member-writable `sessions/_active` rule deployed. Files: `QuestionSessionRepository[Impl].kt`, `GameSessionManager.kt`, `firestore.rules`. | **Fixed + verified live (`23dd6a7`):** parallel-tap race → **1 session** (was 2); sequential 2nd start → joins; pointer self-heals on completion; 0 FATAL. **→ Round 8: re-confirm, then delete this row.** |
-
 ## Resolved & confirmed (archived — full detail in git history)
-A-001 · A-003 · A-OBS · B-001 · B-002 · B-003 · B-004 · C-CC-001 · C-DS-001 · C-NAV-001 · D-001 · E-001 · E-002 · E-003 · E-OBS · F-OBS — all fixed and re-verified across Rounds 2–6 (commits cited in history). Pruned from the live report per the one-confirmation-round rule. (C-OBS / `outcomes` list / SubscriptionScreen per-user gate = investigated, **not bugs**.)
+A-001 · A-003 · A-OBS · B-001 · B-002 · B-003 · B-004 · C-CC-001 · C-DS-001 · C-NAV-001 · D-001 · E-001 · E-002 · E-003 · E-OBS · F-OBS · F-RACE-001 — all fixed and re-verified (commits in history; **F-RACE-001** fixed `23dd6a7`, re-confirmed live R8: race → 1 session, loser joins same set). Pruned per the one-confirmation-round rule. (C-OBS / `outcomes` list / SubscriptionScreen per-user gate = investigated, **not bugs**.)
 
 ## Security cornerstone — clean (Pass D, deep dive, Round 7)
 - **D1 at-rest:** chat text + `lastMessagePreview` + all 4 game-answer collections (ToT / How Well / Desire Sync / Wheel, both users) + Memory Lane capsules + date-swipe actions = `enc:v1:`. No plaintext content; only metadata in clear.
@@ -37,6 +32,7 @@ A-001 · A-003 · A-OBS · B-001 · B-002 · B-003 · B-004 · C-CC-001 · C-DS-
 - **Robustness:** malformed/abusive deep-link intents (unknown type, missing extras, injection/path-traversal) → 0 crash; killed-state cold-start chat deep-link → conversation loads.
 
 ## Round history (one line each)
+- **R8** (in progress) — F-RACE-001 re-confirmed live (race → 1 session; loser joins winner's same-set session via "Join the game") + pruned; running Passes I/J.
 - **R7** — multi-angle security/concurrency deep dive → cornerstone fully clean; F-RACE-001 found + fixed + verified. 0 new open.
 - **R6** — branding drop + Future.md backlog regression (white-keyhole icons/loader/splash, inclusive gender, copy, rate-limit split, results-push suppression, paywall retry/offline) → 0 new open.
 - **R5** — Cloud Functions deployed (E-OBS channel fix, E-003 results routing) + new Pass G (account creation / fake-account abuse) clean → 0 open.