1. New Findings

- P1 / High - The focused regression tests do not exercise the scoped implementation in this isolated snapshot. `tests/test_entity_registry.py:10` imports `mempalace_code.entity_registry`, but because the scoped snapshot contains `mempalace_code/entity_registry.py` without a package marker, Python resolves the import to the installed package at `/Users/rerg/dev/mempalace/mempalace_code/entity_registry.py`. Evidence: `python -m pytest tests/test_entity_registry.py -q` fails because the imported `EntityRegistry.save()` is still the old direct `write_text()` implementation: the `os.replace` monkeypatch is never hit and the saved file remains `0644`. This blocks acceptance verification and can let the task converge against code other than the scoped diff.

2. Known Issues Map Status

- Previous round report `docs/audits/UPSTREAM-ENTITY-REGISTRY-ATOMIC-SAVE-round-0.md` was not present in this snapshot.
- Matching task/backlog context reviewed in `docs/plans/UPSTREAM-ENTITY-REGISTRY-ATOMIC-SAVE.md`; no duplicate known issue found for the import-resolution failure.

3. Evidence Reviewed

- Scoped diff: `.tasks/TASK-UPSTREAM-ENTITY-REGISTRY-ATOMIC-SAVE/codex-hardening-round-1.diff`
- Scoped files manifest: `.tasks/TASK-UPSTREAM-ENTITY-REGISTRY-ATOMIC-SAVE/codex-hardening-round-1-files.txt`
- Task plan/backlog context: `docs/plans/UPSTREAM-ENTITY-REGISTRY-ATOMIC-SAVE.md`
- Implementation lines: `mempalace_code/entity_registry.py:312`
- Test lines: `tests/test_entity_registry.py:10`
- Verification run: `python -m pytest tests/test_entity_registry.py -q` returned 2 failed, 2 passed.
- Import-resolution check showed `mempalace_code.entity_registry.__file__` as `/Users/rerg/dev/mempalace/mempalace_code/entity_registry.py`, not the scoped file under the current workspace.

4. Residual Risks

- I did not expand into unrelated repo areas. Review stayed within the scoped diff, touched files, the matching plan, and realistic `EntityRegistry.save()` call paths.
- Once the test import is rooted to the scoped code, the atomic-save implementation should be re-tested. A stricter crash-durability pass may also consider whether parent-directory fsync after `os.replace()` is required by the feature contract, but I did not raise that as a finding because the explicit acceptance criteria focus on complete temp-file fsync plus atomic replacement behavior.

5. Convergence Recommendation

- Do not converge yet. Fix the test/import environment so `tests/test_entity_registry.py` imports the scoped `mempalace_code/entity_registry.py`, then rerun the focused persistence tests.

6. Suggested Claude Follow-Up

- Ensure the scoped package is importable ahead of any installed `mempalace_code` package, for example by including the package marker/setup context in the scoped snapshot or adjusting the test harness.
- Rerun `python -m pytest tests/test_entity_registry.py -q` and confirm the `os.replace` failure test hits the new atomic-save implementation and the permission test observes `0600`.
