| 1 | **P2 — Source files lose protection before rollback is ruled out.** [regionha_test.go:2141](/home/paulca/amadan.net/carlos/platform/.claude/worktrees/region-ha-two-box-build/internal/sim/hostlife/regionha_test.go:2141) |
| 2 | |
| 3 | The `landing` branch stops protecting the source region when the target’s admission changes `holder.Gen`. Admission does not commit the move; a clean rollback remains possible. |
| 4 | |
| 5 | The reachable sequence is: |
| 6 | |
| 7 | 1. Use the new stopped-move witness’s setup: a source restart queues a generation park, while the older generation holds the keyed manifest. |
| 8 | 2. Delay that park until the target probe is admitted, before commit. `filesHome` now returns false for the source, allowing the sibling to archive its manifest and referenced object. |
| 9 | 3. Roll back cleanly. [moves_test.go:1509](/home/paulca/amadan.net/carlos/platform/.claude/worktrees/region-ha-two-box-build/internal/sim/hostlife/moves_test.go:1509) restores the source generation. |
| 10 | 4. The unchanged-files publisher can skip republication at [regionha_test.go:2014](/home/paulca/amadan.net/carlos/platform/.claude/worktrees/region-ha-two-box-build/internal/sim/hostlife/regionha_test.go:2014). A subsequent source failure leaves failover without the keyed manifest. |
| 11 | |
| 12 | At `a2ef0203`, the region-blind chain lookup preserved that source manifest. This is a regression introduced by the regional restriction. It is established by static tracing, **not an executed reproduction**. |
| 13 | |
| 14 | **Fix:** preserve the source rollback files and their references until rollback is ruled out. Add a witness that delays the queued park until after target admission, rolls back cleanly, then requires source-region failover to succeed. |
| 15 | |
| 16 | The other answers to the brief: |
| 17 | |
| 18 | - **Original late-PUT defect:** the region-qualified lookup addresses it, and the revised witness covers both the manifest and object. |
| 19 | - **Phase table:** “no home” for creating, deleting, parking and purging agrees with §5.1. Keeping the source region throughout relocation agrees with claim §6.2a’s unchanged-region rule, including pinning without an executor. The landing condition follows the table’s current-generation authority, but that alone does not preserve the files needed for rollback. |
| 20 | - **Optional invariant:** add independent preservation coverage, including rollback files. Keep the existing INV-3 scenarios as separate liveness evidence; their expected failure strings should not prevent a safety check. An invariant derived from the same `filesHome` predicate would miss this defect. |
| 21 | - **J2/J3:** unchanged by this fix. |
| 22 | |
| 23 | `git diff --check` and package formatting passed. Go tests could not run because the sandbox refused creation of the build directory. The supplied sweep results and identity hashes remain independently unverified. |
| 24 | |
| 25 | --- |
| 26 | |
| 27 | **FIRST PROMPT:** |
| 28 | Review the J1 fix at dfab457c against the R2 brief and stage A fe144bab. |
| 29 | |
| 30 | **WHAT:** |
| 31 | Check J1 closure, phase semantics and regressions. |
| 32 | |
| 33 | **STATUS:** |
| 34 | Review complete; one P2 rollback-preservation finding. |
| 35 | |
| 36 | **NEEDED:** |
| 37 | Nothing from you. |
| 38 | |
| 39 | **RECOMMENDED:** |
| 40 | Preserve rollback files and add the post-admission rollback witness. |
| 41 | |
| 42 | **SESSION:** |
| 43 | Safe to close. No files changed or processes left running; the read-only workspace prevented saving a handoff file. |
| 44 | |
| 45 | **Verdict: J1 is not closed.** |
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