Reviewed `f4614a392dd01b9b5fc6ea46c3d106e38a8011d5` read-only. No builds or tests run; working tree unchanged.

**Round-5 item — Closed.** The [revised contract](/home/paulca/amadan.net/carlos/platform/.claude/worktrees/design-region-ha-2b/docs/superpowers/plans/2026-10-17-region-ha-2b-joining.md:94) withdraws the commit ceiling and explicitly accepts later commits. The conditional-write citations match the code. `TestAWriteTheConsoleGaveUpOnCanCommitLater` delays the mutation itself until after cancellation and a subsequent fresh refusal. Both filesystem authority rows are marked ruled.

**New finding — P3: The SDK test misses successful writes through the wrapper stack.** At [Task 4, line 3203](/home/paulca/amadan.net/carlos/platform/.claude/worktrees/design-region-ha-2b/docs/superpowers/plans/2026-10-17-region-ha-2b-joining.md:3203), the fake returns not-found, so the roster write with ETag `"e0"` exits at the boundary’s CAS check. The assertion expects only a GET; the successful PUT below bypasses both wrappers. Consequently, dropping the context specifically when either wrapper forwards `Put` would escape this test. Add successful conditional writes through the complete stack and assert the outgoing PUT deadline. The current forwarding code preserves the context, so this is a coverage gap, not a demonstrated runtime defect.

The inherited stop/start verification remains **partly complete**, explicitly gated before activation.

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**FIRST PROMPT:**
Round 6 review of region HA 2b at `f4614a39`.

**WHAT:**
Check round-5 closure and identify new findings.

**STATUS:**
Round-5 P2 closed; one new P3; no P2-or-higher findings.

**NEEDED:**
Nothing for this review.

**RECOMMENDED:**
Build the plan; strengthen the SDK write-path test during implementation.

**SESSION:**
Safe to close. No files changed or background processes started.

**Verdict: ready to build.**