test(proxy): keep eventless anchored bridge replay fail-closed

[kevinsslin]

Summary

This PR now provides regression coverage for the safe behavior established during review:

• an eventless precreated request carrying previous_response_id remains fail-closed;
• that invariant holds both with and without a sibling request on the shared bridge;
• the existing unanchored first-turn retry is covered at the public HTTP Responses route and preserves the exact request payload.

Related: #1735, #1657, #1739.

This PR intentionally does not close #1735 and does not add same-anchor replay.

Safety decision

A local zero-event view cannot prove that upstream never dispatched an anchored turn. Resending the same previous_response_id without durable dispatch proof can create duplicate child responses, duplicate model or tool work, and ambiguous settlement. Reconnecting a shared bridge can also strand a sibling request.

The anchored eventless path therefore stays fail-closed. Safe recovery remains the durable operation-ledger path from #1657, with #1739 preserving eligible requests through retry-circuit cooldown.

Scope

• Test-only change; no proxy behavior, settings, database schema, public API, or OpenSpec requirement changes.
• Rename the route regression so its unanchored scope is explicit.
• Assert the replacement socket receives the exact original request payload.
• Add contributor attribution required by CI.

Validation

• uv run pytest -q tests/unit/test_proxy_http_bridge.py::test_http_bridge_eventless_anchored_precreated_retry_stays_fail_closed tests/integration/test_http_responses_bridge.py::test_v1_responses_http_bridge_retries_unanchored_request_when_upstream_never_acknowledges_response_create — 3 passed
• uv run ruff check tests/unit/test_proxy_http_bridge.py tests/integration/test_http_responses_bridge.py — passed
• uv run ruff format --check tests/unit/test_proxy_http_bridge.py tests/integration/test_http_responses_bridge.py — passed
• uv run python .github/scripts/check_all_contributors.py — passed
• git diff --check — passed

Validated after rebasing onto current upstream/main at 6ead9f31.

[chatgpt-codex-connector]

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[Soju06]

Thanks for the follow-up work here. After the second commit (737dbad) this PR is in an inconsistent state that needs resolving before review can proceed:

1. The PR no longer implements what the title and body describe. 737dbad reverted the entire recovery implementation (request_submit.py, retry_circuit.py, upstream_events.py, support.py, and the recover-precreated-anchored-bridge openspec change), presumably in response to the Codex P1s about missing dispatch proof and sibling ownership. The net diff is now tests-only, and the new unit test (test_http_bridge_eventless_anchored_precreated_retry_stays_fail_closed) asserts the opposite of the PR title — that the anchored eventless retry stays fail-closed. That means "Fixes fix(proxy): recover anchored HTTP bridge turns after silent response.create #1735" is no longer true, and the Validation section (pinned to 1858d95b) is stale. If the conclusion is that same-anchor replay is unsafe without an upstream idempotency guarantee (I think that's the right call given the duplicate-child-response risk Codex flagged), please retitle/rescope this as a fail-closed regression-coverage PR and unlink fix(proxy): recover anchored HTTP bridge turns after silent response.create #1735 — or move that discussion back to the issue for a decision on whether an anchored recovery is achievable at all.

2. Commit attribution. 737dbad is authored by Darafei Praliaskouski <me@komzpa.net>, a different identity from the PR author, and the required "Contributors attribution" check is failing because of it (merge is blocked). Please amend the commit with the correct author identity or add proper attribution.

3. Misleading integration test name. test_v1_responses_http_bridge_retries_when_upstream_never_acknowledges_response_create sends no previous_response_id, so it exercises the existing unanchored eventless retry (which is why it passes with no app changes), not the anchored scenario from fix(proxy): recover anchored HTTP bridge turns after silent response.create #1735. Main already covers essentially this flow on the codex path in test_codex_responses_http_bridge_replaces_retired_gate_without_client_retry. Please rename it to make the unanchored scope explicit (e.g. ..._retries_unanchored_request_when_upstream_never_acknowledges_response_create) or drop it if it's redundant.

The fail-closed unit test itself (including the sibling-ownership parametrization) is useful regression coverage for the invariant Codex called out — happy to see that land once the PR's framing and attribution are fixed.

[coderabbitai]

📝 Walkthrough

Walkthrough

The PR adds regression coverage for silent HTTP bridge retries and updates contributor records. The tests cover anchored fail-closed behavior and unanchored recovery on a replacement websocket.

Changes

HTTP bridge retry coverage

Layer / File(s)	Summary
Anchored retry rejection tests tests/unit/test_proxy_http_bridge.py	Adds parametrized coverage for eventless anchored requests. The test verifies fail-closed behavior without reconnection.
Unanchored retry recovery test tests/integration/test_http_responses_bridge.py	Adds integration coverage for recovery after a silent upstream. The test verifies replacement connection use and stalled socket cleanup.

Contributor record updates

Layer / File(s)	Summary
Contributor attribution records .all-contributorsrc, README.md	Adds contributor entries and code and test contribution links.

Estimated code review effort: 2 (Simple) | ~10 minutes

Merge Risk: 🔵 Low · up to 0c26c

The change adds a narrowly scoped recovery path for silent anchored continuations. Merge is reasonable with owner awareness that the integration test should also verify the retried request body is unchanged.

Suggested reviewers: soju06, komzpa

🚥 Pre-merge checks | ✅ 3 | ❌ 2

❌ Failed checks (2 warnings)

Check name	Status	Explanation	Resolution
Linked Issues check	⚠️ Warning	The tests do not implement issue #1735's required bounded anchored recovery and the integration test covers an unanchored request.	Implement one bounded same-account retry for eligible anchored requests, or rescope the PR and unlink issue #1735.
Out of Scope Changes check	⚠️ Warning	The contributor registry and README attribution changes are unrelated to the proxy recovery requirements in issue #1735.	Move contributor attribution changes to a separate pull request or provide a direct issue objective for them.

✅ Passed checks (3 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly describes the main regression test coverage for eventless anchored bridge replay that must fail closed.

✨ Finishing Touches 💡 1

⚔️ Resolve merge conflicts 💡

• Resolve merge conflict in branch codex/fix-precreated-response-created-recovery

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[coderabbitai]

Actionable comments posted: 1

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Inline comments:
In `@tests/integration/test_http_responses_bridge.py`:
- Around line 9012-9016: Extend the assertions in the retry response test around
the captured payloads so the first and recovered upstream request bodies are
compared for exact equality, while preserving the existing count and connection
assertions.

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Fix all unresolved CodeRabbit comments on this PR:

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ℹ️ Review info

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📥 Commits

Reviewing files that changed from the base of the PR and between c3f0c56 and 0c26c99.

📒 Files selected for processing (4)

• .all-contributorsrc
• README.md
• tests/integration/test_http_responses_bridge.py
• tests/unit/test_proxy_http_bridge.py

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