fix(codex): bind stored Direct account identity on both materializers

[luvs01]

Summary

Make both synchronous and asynchronous stored Direct credential materialization own account identity. Remove a caller-provided account header before applying the stored credential; preserve ordinary native Direct passthrough and fail closed when no usable stored credential exists.

Current author verification

• Published head: 36bba42f697913dbf2d7b1f8635b66db8f155927.
• The follow-up adds direct synchronous coverage for a stored credential without account_id. It verifies removal of an inbound caller account ID and preservation of the entire original Headers object. Runtime code is unchanged.
• The new test fails under either negative control: removing account-ID deletion or aliasing/mutating the inbound Headers. Restored-source auth-context coverage passed: 79 tests, 336 assertions. Typecheck, privacy, structure and diff checks passed.
• Exact-head CI run 35039034213 was requested once. CI completion remains pending. The new upstream workflow requires approval to run; prior-head CI success is not claimed for this test revision.
• The synchronous coverage review has been answered and resolved. Maintainer sponsorship remains present; current-head CI and review remain separate requirements.

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Summary by CodeRabbit

Bug Fixes

• Stored Direct credentials now consistently determine upstream account identity for synchronous and asynchronous requests.
• Caller-provided account headers are removed when stored credentials are used, preventing unintended identity forwarding.
• Unrelated headers remain preserved, and native Direct passthrough behavior is unchanged.

Documentation

• Updated configuration, runtime, integration, and provider documentation to clarify stored Direct credential identity handling.

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• tests/helpers/stored-direct-identity.ts

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📝 Walkthrough

Walkthrough

Stored Direct substitution now removes forwarded chatgpt-account-id values before applying stored credentials in synchronous and asynchronous paths. Tests cover Codex, Responses, and audio transcription flows. Reference documentation describes the behavior.

Changes

Stored Direct credential identity

Layer / File(s)	Summary
Credential materialization and inbound handling src/codex/auth-context.ts, structure/data-planes/inbound-compat.md	Both materializers remove the caller account header before applying the stored credential identity. The inbound compatibility documentation records the same behavior.
Stored identity behavior tests tests/helpers/stored-direct-identity.ts, tests/codex-integration/codex-auth-context.test.ts, tests/responses/responses-native-main-refresh.test.ts, tests/server/audio-transcriptions.test.ts	Shared tests and endpoint tests verify stored authorization, account-header removal, stored account-ID handling, unrelated header preservation, and inbound-header immutability.
Credential identity documentation structure/catalog.md, structure/codex-home.md, structure/config.md, structure/gui-and-management-api.md, structure/ops/docs-and-release.md, structure/providers/openai-tiers.md, structure/runtime.md, structure/subagents.md	Documentation describes stored Direct substitution and states that native Direct passthrough remains unchanged.

Priority: ⬇️ Low

Estimated code review effort: 2 (Simple) | ~15 minutes

Change: Bug fix

Merge Risk: ⚪ Minimal · up to 36bba

The stored identity behavior is covered across materialization and endpoint paths, with native Direct passthrough preserved.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 25.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 4 functions across 5 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the main change: binding stored Direct account identity in both synchronous and asynchronous materializers.

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[github-actions]

⚠️ Deterministic hygiene checks failed.

• unsponsored_surface — This changes an authentication, workflow, release-automation, or dependency surface. MAINTAINERS.md requires security review for these; ask a maintainer to apply maintainer-sponsored once they have reviewed it. Paths: src/codex/auth-context.ts.

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[luvs01]

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[lidge-jun]

리뷰 · 우선순위 56 / 80

이 PR은 저장된 Direct 자격으로 들어갈 때, 호출자가 보낸 chatgpt-account-id가 저장본에 계정 ID가 없으면 살아남지 못하게 막는 수정입니다. 동기 경로뿐 아니라 /v1/responses·/v1/responses/compact가 쓰는 비동기 materializer에도 같은 규칙을 적용합니다. 호출자 소유의 native Direct 패스스루는 그대로 둡니다.

지금 dev는 이미 cost-guard·affinity 관찰(#4580/#4581/#4592)까지 올라온 상태라, 계정 정체성이 로그/라우팅과 섞여 보일 때 “저장 계정 vs 호출자 헤더” 경계가 더 중요해졌습니다. 한쪽만 고치면 transcription은 안전하고 Responses는 위험한 비대칭이 남으므로, 두 materializer를 같이 맞춘 방향은 맞습니다. 소유 문서(structure/codex-home.md 등)와 테스트도 같이 손댔습니다.

다만 이 글을 쓰는 순간 체크가 깨끗하지 않습니다. hygiene와 enforce-target이 FAILURE로 보입니다. 베이스도 고정 스냅샷 43f4450a5에서 출발했다고 본문에 있어, 현재 dev tip(849f3c9cc)과는 거리가 있습니다. 머지 전에 실패 원인(타깃 브랜치 규칙/위생 게이트)을 풀고, 필요하면 tip에 맞춰 충돌만 없는지 확인해야 합니다.

경로 src/codex/auth-context.ts - 동기·비동기 양쪽에서 저장 자격 적용 전 caller account 헤더 제거가 같은 순서인지, 조기 return이 한쪽만 건너뛰지 않는지 확인이 필요합니다.
심볼 native Direct passthrough - “호출자 소유 패스스루는 변경 없음”이 테스트로 고정돼 있는지(회귀가 저장-자격 경로에만 있는지) 봐야 합니다.
경로 CI hygiene / enforce-target - 현재 FAILURE면 리뷰 점수와 별개로 머지 불가입니다. 로그를 보고 타깃/dev 드리프트를 먼저 고치세요.
경로 테스트 파일들 - audio-transcription과 responses-native-refresh 양쪽을 건드린 것은 범위와 맞습니다. tip 리베이스 후 스위트가 그대로 초록인지가 관건입니다.

메인테이너의 판단이 필요한 지점

• CI 실패가 규칙 위반(타깃 브랜치)인지, 일시적 워크플로 문제인지
• dev tip에 리베이스가 필요한지, 아니면 충돌 없는 패치로 충분한지
• 이 수정을 2.55.0 이후에 남겨도 되는지(릴리스 트레인 #4599/#4600과 겹치는지)

너의 추천
의도(저장 Direct 정체성 일관)는 좋고 types/config 분할과도 무관합니다. 다만 지금 헤드의 hygiene/enforce-target 실패를 고치기 전에는 머지하지 마세요. 릴리스 프로모션(#4599/#4600)보다 우선할 이유는 없어 보입니다.

이 댓글은 grok-bot이 작성했습니다

[lidge-jun]

Sponsoring. src/codex/auth-context.ts is a restricted surface, so this needs a maintainer review rather than an author change. This comment is that review, and this one got the closest reading of the batch because it is the actual identity boundary.

The change adds selected.delete("chatgpt-account-id") before the stored credential is installed, on both the sync and the async materializer. Without it, a caller-supplied chatgpt-account-id survives when the stored credential carries no account id, which pairs one account's token with another account's identity. The fix tightens the boundary rather than widening it, and it cannot drop a legitimately stored id because the next line re-sets it.

The test change deletes an existing #1686 regression test and moves it into tests/helpers/stored-direct-identity.ts. That pattern deserves suspicion, so I read the helper: it preserves the #1686 test verbatim — same name, same four assertions, including that the admission secret never reaches the outgoing authorization header — and adds a parameterised async case covering both a present and an absent stored account id, plus an assertion that the inbound Headers object is not mutated. Coverage is strictly stronger, not weaker.

One thing I got wrong and am recording rather than leaving: I initially noted that the sync materializer's new delete had no negative test. It does. tests/server/audio-transcriptions.test.ts sends chatgpt-account-id: caller-workspace with the key in x-opencodex-api-key, so authorization is empty and the admission-secret scrub does not fire; chatgpt-account-id is in FORWARD_HEADERS, the request reaches the sync materializer with substituteMainCredential: true, and the stored auth.json has no account_id. Reverting the sync delete fails that test. Both materializers are covered.

Applying maintainer-sponsored.

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Actionable comments posted: 1

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Inline comments:
In `@tests/helpers/stored-direct-identity.ts`:
- Line 17: Add a synchronous substitution test alongside the existing coverage
in the stored direct identity helper, using an inbound chatgpt-account-id header
and stored credentials without account_id; assert the materialized account ID is
null and the inbound header value remains unchanged.

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📒 Files selected for processing (11)

• src/codex/auth-context.ts
• structure/catalog.md
• structure/config.md
• structure/data-planes/inbound-compat.md
• structure/gui-and-management-api.md
• structure/ops/docs-and-release.md
• structure/providers/openai-tiers.md
• structure/runtime.md
• structure/subagents.md
• tests/codex-integration/codex-auth-context.test.ts
• tests/helpers/stored-direct-identity.ts

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[luvs01]

The review follow-up is published at 36bba42f697913dbf2d7b1f8635b66db8f155927; the inline reply and PR description record the negative controls, passing focused validation and pending exact-head CI.

@codex review

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Codex Review Summary

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

Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-09-16T00:17:51.521139Z	36bba42	Manual request

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Codex Review: Didn't find any major issues. You're on a roll.

Reviewed commit: 36bba42f69

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