# PR #51 round 2 delta review — Codex

Job: 24b21b9c
Loop: loop-20261007T162612Z-9fe4f9
Base: 518bedac5d8ab832347bfc6682b146f3201021f1
Head: 4c86107846d1e037f9a69a1201257725e8673179
Tree: e6f67f6136b8f0cec15ce98400ae7d7710cedf1e
Validation path: /var/folders/q_/68sxgw3j073dgjg8wl9s08vw0000gn/T/mam-review/loop-20261007T162612Z-9fe4f9/1

## Conclusion

R1 is closed on code inspection and deterministic execution. No new code defect was found in the two-file delta. Overall approval is withheld solely because the required two-file suite could not execute its test bodies under this session's network restrictions. This is a validation/environment blocker, not a request to change the implementation. Run the required suite in a permitted isolated environment before promoting this review to PASS; no design escalation is needed.

## R1 closure table

| Item | Evidence | Result |
| --- | --- | --- |
| 1-second wait after a 10-second backward wall-clock step | wrapper.py:150,153; independent base/head comparison: 11.0 seconds -> 1.0 second | Closed |
| 3-second wait after the same step | wrapper.py:150,153; independent base/head comparison: 13.0 seconds -> 3.0 seconds | Closed |
| Broker re-observation consumes the corrected wait | wrapper.py:211; finalize_end with completion appearing during the wait: base 13.0 seconds, head 3.0 seconds, both return completed | Closed |
| Heartbeat grace consumes the corrected wait | wrapper.py:239; finalize_end with completion appearing during the wait: base 11.0 seconds, head 1.0 second, both return completed | Closed |
| Owner polling retained | wrapper.py:152,156; injected owner loss observes checks at elapsed 0.0, 0.5, 1.0 seconds and raises OwnerGone at 1.0 | Preserved |
| Deadline retains wall-clock policy | wrapper.py:203,226,240; forward wall-clock jump during the 1-second grace produces wall_clock_timeout at elapsed 1.0 second | Preserved |

File references above are relative to `.agents/skills/lib_py/delegation/` in the validation tree.

## Scope and test quality

Only `.agents/skills/lib_py/delegation/wrapper.py` and `tests/test_issue17_item4_decisions.py` changed (43 insertions, 3 deletions). Production changes are restricted to the `_sleep` docstring and its two clock reads. `_now`, heartbeat timestamp age, evidence windows, START_TIME + TIMEOUT, subprocess/registry/event handling, and surrounding branch logic are unchanged.

The regression tests at tests/test_issue17_item4_decisions.py:598-630 use separate simulated wall and monotonic clocks, step wall time backward once, and advance in deterministic half-second increments. They perform no real sleep or clock adjustment. Both 1- and 3-second cases distinguish the faulty base from the fixed head decisively. The extra owner/deadline probes cover behavior not asserted by these two new tests.

Previous nonblocking follow-ups and the unrelated main-branch restore failure were not reopened.

## Validation results

- Required suite attempted with Python 3.9 from `/Users/godopu16/PuKi/laa/canary_projects/multi-agent-mux-wt/pr-51/.venv/bin/python`, PYTHONDONTWRITEBYTECODE=1, pytest cache disabled, and external basetemp `/tmp/24b21b9c-selected`.
- Targets: `tests/test_issue17_item4_decisions.py tests/test_issue33_budget.py`.
- Result: **278 setup errors in 1.80s**, exit 1; no passing test-body claim is made for this run. Every case is blocked by the session-autouse local MQTT fixture: tests/conftest.py:1575 calls start_broker, then tests/_local_mqtt.py:90 fails at `self._lsock.bind(("127.0.0.1", 0))` with `PermissionError: [Errno 1] Operation not permitted`.
- Required-suite log: `/tmp/24b21b9c-selected.log`.
- Separate network-free run: `python -m pytest --noconftest -p no:cacheprovider -q --basetemp=/tmp/24b21b9c-unit-tests tests/test_issue17_item4_decisions.py::test_u_a_wait_is_not_stretched_by_a_wall_clock_step_back` -> **2 passed in 0.08s**. This deliberately excludes the broker autouse fixture and is supplementary evidence, not a substitute claim for the required suite.
- Independent probe script `/tmp/24b21b9c-probes.py`: all assertions passed for base/head sleep, both finalize paths, forward wall-clock expiry, and owner polling. Actual system time was never changed; side effects and disk reads were stubbed for finalize probes.
- Both changed Python files passed AST parsing; `git diff --check BASE HEAD` passed.
- HEAD/tree matched the brief before and after validation; final `git status --porcelain` was empty.

## Reproduction and resolution of the validation blocker

Use the brief's required two-file pytest command in this restricted session. Expected: the isolated local broker starts and the 278 test bodies execute. Actual: binding the local TCP listener is denied before any test body runs. Resolution: rerun the same suite in an environment that permits its isolated loopback broker; do not modify product code, suppress the integration fixture, or classify setup errors as passing tests.

## Isolation and lifecycle

Before tests and probes, inherited HERDR_*, MAM_*, MQTT_*, SKS_* and control-plane binding variables were removed; temporary HOME, HOME_DIR, WORKSPACE_ROOT, XDG_CONFIG_HOME and absent MAM_ENV_FILE were supplied. The required-suite harness additionally set WORKSPACE_ROOT to each test's tmp_path via an environment-only autouse plugin, so sourcing helpers cannot generate a shim in the review snapshot or another workspace. No .mam.env was exported, no live herdr server was used, and no source files, branches or commits were changed. Only the requested report and lifecycle publisher used this job's real control-plane paths.

The requested started command was attempted first, but MQTT publication exhausted three attempts and exited 2 with Operation not permitted. The requested completed command was also executed after saving this report; all three MQTT attempts failed with Operation not permitted and the command exited 2. The report is saved, but neither lifecycle event was successfully delivered to the broker.

[VERDICT: NOT PASS]