test(proxy): keep eventless anchored bridge replay fail-closed by kevinsslin · Pull Request #1736 · Soju06/codex-lb

kevinsslin · 2026-08-14T04:49:55Z

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.

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.

Summary by CodeRabbit

Bug Fixes
- Improved reliability when HTTP bridge requests retry after an upstream connection stalls before acknowledging a response.
- Ensured stalled connections close correctly and requests are retried against a functioning upstream.
- Prevented unnecessary reconnection attempts when anchored sessions close with an upstream failure code.

Integrates the reviewed transport reliability fixes from upstream PRs Soju06#1723, Soju06#1726, and Soju06#1736 into the production fork main after combined local validation.

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Soju06 · 2026-08-16T07:48:41Z

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:

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.
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.
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 · 2026-08-16T07:56:00Z

No actionable comments were generated in the recent review. 🎉

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tests/integration/test_http_responses_bridge.py
tests/unit/test_proxy_http_bridge.py

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tests/unit/test_proxy_http_bridge.py
tests/integration/test_http_responses_bridge.py

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📝 Walkthrough

Walkthrough

The pull request adds regression coverage for HTTP bridge behavior when an upstream remains silent before response.created. The tests verify bounded recovery for unanchored requests and fail-closed behavior for anchored requests.

Changes

HTTP bridge retry coverage

Layer / File(s)	Summary
Anchored retry rejection tests `tests/unit/test_proxy_http_bridge.py`	A parametrized async test verifies that eventless anchored requests return `False` without reconnection, with and without a sibling request.
Unanchored retry recovery test `tests/integration/test_http_responses_bridge.py`	An integration test verifies retry on a replacement websocket, successful completion, stalled socket closure, and identical request payloads.

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

Merge Risk: ⚪ Minimal · up to ccefc

This test-only change adds regression coverage without changing proxy behavior or production configuration; no actionable merge-blocking risk remains after normal checks and review.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Linked Issues check	⚠️ Warning	The PR adds fail-closed and unanchored retry tests but does not implement or prove the anchored same-anchor recovery required by issue `#1735`.	Implement bounded same-account replay for one silent anchored replacement, with tests for recovery and second-silent fail-closed behavior.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly describes the anchored bridge fail-closed regression tests, which are a primary part of the changes.
Out of Scope Changes check	✅ Passed	The changes are limited to related HTTP bridge regression tests and contain no unrelated production, configuration, schema, or API changes.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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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
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…reated

…dy landed on main) Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

coderabbitai · 2026-08-18T04:17:37Z

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Soju06 · 2026-08-18T04:17:48Z

All three items from the last review are addressed: the PR is now honestly scoped as fail-closed regression coverage, the integration test's unanchored scope is explicit in the name, and the payload-identity assertion is in. The fail-closed unit test with the sibling-ownership parametrization is exactly the invariant coverage we wanted.

Since maintainer edits are enabled, I've pushed a merge of current main to the branch (ccefcbb), taking main's side of .all-contributorsrc/README.md — your attribution entry already landed on main independently, so the PR is now tests-only. Verified on the merged tree: the fail-closed unit tests (15 passed) and the unanchored bridge payload test (4 passed) are green locally. Will merge once CI confirms.

kevinsslin mentioned this pull request Aug 14, 2026

fix(proxy): integrate transport reliability fixes kevinsslin/codex-lb#1

Merged

kevinsslin marked this pull request as ready for review August 14, 2026 08:59

chatgpt-codex-connector Bot reviewed Aug 14, 2026

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Comment thread app/modules/proxy/_service/http_bridge/request_submit.py Outdated

Comment thread app/modules/proxy/_service/http_bridge/upstream_events.py Outdated

Komzpa added 🤖 codex: needs work [@codex review] raised an issue and removed 🤖 codex: needs work [@codex review] raised an issue labels Aug 14, 2026

Soju06 mentioned this pull request Aug 16, 2026

fix(proxy): recover anchored HTTP bridge turns after silent response.create #1735

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kevinsslin changed the title ~~fix(proxy): recover anchored bridge requests after missing response.created~~ test(proxy): keep eventless anchored bridge replay fail-closed Aug 16, 2026

coderabbitai Bot reviewed Aug 16, 2026

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Comment thread tests/integration/test_http_responses_bridge.py

kevinsslin and others added 4 commits August 16, 2026 15:59

fix(proxy): recover anchored bridge requests after missing response.c…

841fbca

…reated

fix(proxy): fail closed eventless anchored bridge replay

705cc9c

docs(contributors): add kevinsslin attribution

8122e17

test(proxy): name unanchored eventless retry scope

3add812

kevinsslin force-pushed the codex/fix-precreated-response-created-recovery branch from 0c26c99 to 3add812 Compare August 16, 2026 08:00

coderabbitai Bot mentioned this pull request Aug 16, 2026

fix(proxy): hold fenced hard turns through cooldown #1739

Merged

kevinsslin and others added 2 commits August 16, 2026 16:05

test(proxy): preserve unanchored retry payload

6ead9f3

chore: merge main; take main's side of attribution files (entry alrea…

ccefcbb

…dy landed on main) Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Soju06 merged commit d57bf3a into Soju06:main Aug 18, 2026
46 of 56 checks passed

This was referenced Aug 19, 2026

fix(proxy): bind account-bound retries to dispatch owner #1829

Merged

fix(proxy): retry accepted capacity bridge failures #1384

Open

Soju06 mentioned this pull request Aug 20, 2026

fix(proxy): name the pre-response eventless timeout honestly and derive its budget from settings #1633

Open

This was referenced Aug 20, 2026

fix(http-bridge): classify recovery error frames and poison same-anchor eventless failures #1841

Merged

fix(proxy): absorb replay-safe compaction recovery #1849

Merged

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test(proxy): keep eventless anchored bridge replay fail-closed - #1736

test(proxy): keep eventless anchored bridge replay fail-closed#1736
Soju06 merged 6 commits into
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kevinsslin:codex/fix-precreated-response-created-recovery

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Summary

Safety decision

Scope

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