[AdaWorldAPI]

This fixes the Codex P2 finding on #1767, which merged before the review finished. The change is test-only.

What was wrong. The W6 "regenerate from the changed source" arm passed without testing what it claimed.

• The source change flipped the staged facet byte, which dirty_cycle overwrites for every dirty row, so the regenerated payloads were identical.
• The HashConflict came from a different cause: the reconciled head moved the frame base from 0 to 1, and the batch hash covers base_version.
• W4's "the source changes while the WAL holds the commit" step had the same blind spot.

Fix

• Both tests now flip byte 200, which no write stages, and assert that regenerating from the changed source really gives different rows.
• W6 frames every arm on base 0, the cycle's own base.
• W6 adds a control: regenerating from the unchanged source reconciles. So the changed bytes are now the only thing that can cause the refusal.

Checks. 23 tests pass with --features handoff; clippy -D warnings is clean. With the source change removed, both tests fail at the new "rows differ" assertions, so the fixtures now discriminate.

Board: .claude/board/entries/2026-10-25-drf-w4-handoff.md is updated.

---

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[chatgpt-codex-connector]

Codex Review Summary

This comment shows the latest Codex review activity on this pull request.

Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-10-25T07:33:04.370768Z	7125af3	Draft marked ready

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