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fix(auth): retain stored sidecar auth for caller-auth Chat - #4103

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lidge-jun merged 2 commits into
lidge-jun:codex/pr4081-credential-scope-carryfrom
luvs01:agent/pr4102-sidecar-followup-20260909
Sep 9, 2026
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fix(auth): retain stored sidecar auth for caller-auth Chat#4103
lidge-jun merged 2 commits into
lidge-jun:codex/pr4081-credential-scope-carryfrom
luvs01:agent/pr4102-sidecar-followup-20260909

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Summary

Restore stored OpenAI sidecar authentication for an unchanged keyless, non-OAuth Cursor Chat route. A request using its own Cursor bearer skipped the entire optional native-main claim, leaving a Direct OpenAI vision/search sidecar without the stored login.

Claim and capture the stored main credential into the existing sidecar-only snapshot for this route. Primary headers keep the independent Cursor bearer, and the caller Direct snapshot remains caller-owned. A native-main ownership fence still suppresses the sidecar while allowing the Cursor request.

This is a two-file child of #4102 and targets its carry branch so the maintainer can review or integrate the delta directly. It addresses the stored-sidecar finding linked from #4081. The parent's explicit 401 behavior for duplicated proxy credentials is unchanged. Existing authentication documentation already requires a turn claim for optional stored-main sidecar enrichment; this correction restores that documented behavior.

Verification

  • Current parent: 3af5402bcc471a4b9f7a8ba9b6dc67b36464eab0; child head: 4a201df671bf69c83be1c8da736dd33ec245e214; Bun 1.4.2. The parent added three-state ChatGPT-domain classification and malformed-marker/payload guards after the first child validation. Rebases were conflict-free and git range-diff confirmed both child commits retained identical patches. The fixture pins the model already selected by startup migration, avoiding that unrelated config write.
  • Regression baseline: the owned-main case failed because no sidecar request occurred; the ownership-fenced case passed.
  • The new wire regression checks the stored JWT/account and active main claim at the vision sidecar, the independent caller bearer at the real HTTP/2 Cursor capture server, and claim release after completion. The capture fixture intentionally ends without a completion frame; its expected endpoint result is HTTP 502, while the assertions verify both credential destinations.
  • On parent bf8f36f7, the complete bearer-admission and Chat endpoint suites passed 147 tests / 452 assertions in 185.82s. After the fixture correction, both owned/fenced cases passed again (2 tests / 9 assertions). On parent 7939ff3e, the complete bearer suite passed 47 tests / 163 assertions in 133.55s, including all added malformed-marker cases.
  • On final parent 3af5402b, the affected unmarked-JWT, Direct-restore matrix, and stored-sidecar cases passed 18 tests / 60 assertions in 40.08s. A direct inspector probe also verified that number, boolean, string, null, and array payloads do not throw, while a malformed reserved namespace remains invalid. Typecheck, privacy scan, and diff check passed on this head. Full current-head cross-platform CI passed 26/26 jobs on 4a201df671bf69c83be1c8da736dd33ec245e214, including all Windows shards and macOS control; earlier runs remain tied to their previous heads.
  • The previous child 135df7396e95b4984bc85708ebd209fa6aae689b on parent 545a8e46 passed 143 tests / 434 assertions and 26/26 full CI jobs. Those results are previous-parent evidence, not a claim that the new-head CI has passed.
  • Typecheck, privacy scan and diff checks passed. Independent source review found no blocking issue in the two-file delta.
  • CodeRabbit completed the d5cf0474 review and identified the fixture's legacy model migration. That finding is fixed and resolved; there are no unresolved child review threads. CodeRabbit completed the current-head review with no actionable comments. The child is ready for maintainer review and integration into fix(auth): keep credentials scoped to the final routed provider (carry of #4081) #4102; the original fix(auth): keep credentials scoped to the final routed provider #4081 finding remains open until integration is verified.
  • All credentials and servers are synthetic and isolated.

Checklist

  • Scope stays focused and avoids unrelated cleanup.
  • Docs or release notes were updated when needed; the existing documented claim/snapshot contract is restored.
  • Security-sensitive changes were reviewed for secrets, auth, and unsafe defaults; maintainer review remains required.

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Summary by CodeRabbit

  • Bug Fixes
    • Improved authorization handling for routed chat requests, preventing stored credentials from being sent directly when caller-provided authorization is in use.
    • Ensured caller authorization remains isolated to the primary request while permitted vision processing uses the appropriate stored credentials.
    • Prevented vision processing requests for profiles that are not authorized to use them.
    • Preserved correct request accounting after routed chat and vision processing completes.
    • Added coverage for routed requests using separate caller and stored credentials.

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  • tests/codex-integration/bearer-admission-routed-provider.test.ts

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📝 Walkthrough

Walkthrough

The Chat Completions fallback path now preserves stored main credentials for noncanonical caller-authorization sidecars without injecting them into primary wire headers. Integration tests cover owned and fenced Chat Cursor vision-sidecar routes.

Changes

Caller-auth sidecar credential routing

Layer / File(s) Summary
Credential enrichment and header routing
src/server/chat-completions.ts
Noncanonical caller-authorization routes capture stored main credentials for sidecar snapshots. Direct authorization and chatgpt-account-id injection remains disabled for caller-authorization routes.
Vision sidecar route validation
tests/codex-integration/bearer-admission-routed-provider.test.ts
The test setup resets the vision cache. Parameterized tests verify stored vision authentication on owned profiles, no sidecar call for fenced profiles, caller bearer isolation on the primary Cursor wire, and native profile request cleanup.

Priority: ⬇️ Low

Estimated code review effort: 3 (Moderate) | ~20 minutes

Merge Risk: ⚪ Minimal · up to 4a201

Stored OpenAI authentication is restored for eligible Cursor Chat sidecars without replacing the caller’s primary bearer, and fenced profiles remain blocked. No merge-blocking risk is established.

Sequence Diagram(s)

sequenceDiagram
  participant CursorClient
  participant ChatCompletions
  participant VisionSidecar
  CursorClient->>ChatCompletions: caller Cursor bearer
  ChatCompletions->>VisionSidecar: stored main credential snapshot
  ChatCompletions-->>CursorClient: primary wire keeps caller bearer
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Check name Status Explanation Resolution
Docstring Coverage ⚠️ Warning Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 2 functions across 2 files. Write docstrings for the functions missing them to satisfy the coverage threshold.
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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: retaining stored sidecar authentication for caller-auth Chat routes.
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Deterministic PR hygiene checks passed.

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✅ READY

  • all PR quality gates passed; the review readiness checklist is complete.

Review readiness checklist

  • ✅ All CI tests are green on my local testing.
  • ✅ I pushed my PR to the latest dev commit.
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Maintainers: @lidge-jun @Ingwannu

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@luvs01
luvs01 marked this pull request as ready for review September 9, 2026 09:38
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@luvs01
luvs01 force-pushed the agent/pr4102-sidecar-followup-20260909 branch from 135df73 to d5cf047 Compare September 9, 2026 09:46
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리뷰 · 우선순위 74 / 80

설명

이 PR은 #4102(캐리 of #4081) 위의 자식 델타다. base가 dev가 아니라 codex/pr4081-credential-scope-carry이고, Draft다. 고치는 파일은 딱 두 개: src/server/chat-completions.tstests/codex-integration/bearer-admission-routed-provider.test.ts(+61/−4). 로컬 dev HEAD는 여전히 04808916c(#4098 design-dial fence)라서, 이 패치가 말하는 callerAuthorizationRoute / sidecar snapshot 축은 아직 tip dev에는 없고 #4102가 랜딩한 뒤에야 의미가 있다. 지금 dev의 Chat 경로는 아직 if (!directRoute)로 stored main을 primary 헤더에 넣는 옛 모양이다.

무엇을 고치는가. #4102가 keyless·non-OAuth Cursor처럼 호출자 Authorization을 업스트림으로 쓰는 전송에서 stored ChatGPT main이 primary wire로 새어 나가지 않게 막으면서, optional native-main claim 전체를 건너뛰게 됐다. 그 결과 Direct OpenAI vision/search sidecar가 문서가 약속한 “turn claim으로 증명한 stored main 스냅샷”을 못 받아, 이미지 설명·검색 사이드카가 로그인 없이 죽는다. 이 PR은 조건을 넓혀 canonical OpenAI forward가 아닌 settled route에서는 caller-auth여도 claim·capture를 허용하되, primary 헤더에 stored token을 심는 쪽은 계속 !callerAuthorizationRoute && !routeMayChangeCredentialDomain으로 막는다. 즉 Cursor bearer는 그대로 Cursor로, stored JWT/account는 sidecar snapshot으로만 간다. native-main ownership fence가 있으면 sidecar 요청 자체가 안 나가고 Cursor 요청은 계속된다.

왜 지금 dev 기준으로 점수가 높은가. tip 슬라이스(#3719 live replay, #3379 selector rename, #3774 native/featured 등)와는 직교하지만, #4102 credential-domain 열차의 사이드카 구멍을 메운다. 인증 문서가 이미 “optional stored-main sidecar enrichment에는 turn claim이 필요하다”고 하니, 문서와 코드를 다시 맞추는 수정이다. types.ts/config.ts 분할 무효화·중복 close 대상은 아니다. 부모 #4102의 duplicated proxy credential → 명시 401 동작은 건드리지 않는다고 본문이 못 박는다.

검증 이야기. 새 회귀는 ownership owned/fenced 두 갈래로, vision sidecar에 stored JWT·account·claim이 보이는지와 Cursor capture 서버에는 Bearer cursor-upstream-token만 보이는지를 잠근다. capture fixture가 completion frame 없이 끝나서 엔드포인트는 의도적으로 HTTP 502를 기대한다. 부모 최신(bf8f36f) 위 로컬 스위트 통과 주장이 있고, 이전 parent 위에서는 full CI 26/26이었지만 현재 child HEAD의 cross-platform CI는 pending이다. CodeRabbit는 이전 head 기준 no actionable. readiness 체크리스트는 아직 비어 있는 칸이 있다.

라인 - 이게 무슨 문제다

src/server/chat-completions.ts 조건식 !callerAuthorizationRoute || (settledRoute && !isCanonicalOpenAiForwardProvider(...)) - settledRoute가 아직 비어 있는 순간이면 caller-auth 경로가 enrichment를 다시 통째로 건너뛴다. Chat에서 settled가 항상 이 지점 이전에 채워지는지 parent #4102 inventory와 한 줄만 대조하면 된다. 비어 있을 때 sidecar가 필요한 요청이 오면 구멍이 다시 열린다.

src/server/chat-completions.ts primary 헤더 가드 - stored token을 primary에 쓰는 쪽은 caller-auth에서 막혀 있어 방향이 맞다. 다만 sidecar snapshot(openAiSidecarAuth / captureExplicitOpenAiCallerAuth)이 나중에 Responses/vision 경계에서만 쓰이는지, 다른 rewrite가 primary로 끌어올리지 않는지는 #4102의 strip inventory와 같이 봐야 한다.

tests/.../bearer-admission-routed-provider.test.ts 새 테스트의 expect(response.status).toBe(502) - capture fixture 한계를 테스트에 박아 둔 것이다. Cursor fixture가 나중에 정상 completion을 주면 이 assertion이 깨진다. “자격 증명 목적지”가 본래 목적이고 502는 부수 조건이니, 주석을 더 세게 남기거나 status를 soft하게 두는 편이 유지보수에 낫다.

resetVisionDescriptionCache() before/afterEach - 캐시 누수로 sidecar 호출이 생략되는 걸 막는 좋은 가드다. 같은 파일의 다른 vision 테스트에도 이득이 있다.

CI/Draft - base가 carry 브랜치라 dev gate와 별개다. child HEAD CI green + Draft 해제 전에는 머지 버튼이 아니다. #4081 본문 finding은 integration 확인 전까지 열어 둔다고 한다.

메인테이너의 판단이 필요한 지점

  • 이 두 파일 델타를 #4102에 squash/amend로 흡수할지, 자식 PR로 따로 머지할지.
  • fix(auth): keep credentials scoped to the final routed provider (carry of #4081) #4102 랜딩 직후 바로 이어서 태울지, 한 릴리스 쉬어도 되는지(비전 sidecar 회귀라 전자가 설득력 큼).
  • 502를 고정한 회귀를 그대로 둘지, credential assertion만 남기고 status 의존을 줄일지.
  • Draft readiness 체크리스트를 언제 닫을지(현재-head CI 기준).

너의 추천

#4102에 흡수하거나, #4102 직후 이어서 머지할 것. 코드 방향(primary는 Cursor bearer, sidecar만 stored main, fence면 sidecar 생략)이 문서·credential-domain 열차와 맞고, 회귀도 핵심을 잠근다. 단독으로 dev에 먼저 올리면 base가 없어 충돌한다. 다음 스텝: (1) 현재 child HEAD CI green, (2) #4102 리뷰/머지 열차에 이 델타 포함 여부 결정, (3) Draft 해제 후 랜딩, (4) #4081 leftover는 #4102 절차와 같이 처리. types/config 분할 무효화 아님. 인증 sidecar 구멍 + 부모 의존이라 74.

이 댓글은 grok-bot이 작성했습니다

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Actionable comments posted: 1

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Inline comments:
In `@tests/codex-integration/bearer-admission-routed-provider.test.ts`:
- Line 443: Update the visionSidecar fixture in the relevant test to use a model
value that startServer does not migrate, instead of the legacy gpt-5.4-mini
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Comment thread tests/codex-integration/bearer-admission-routed-provider.test.ts Outdated
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luvs01 force-pushed the agent/pr4102-sidecar-followup-20260909 branch from 3f62929 to 4a201df Compare September 9, 2026 10:20
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Reviewed commit: 4a201df671

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if (!callerAuthorizationRoute) {
// A noncanonical caller-auth route can use stored main auth only through a sidecar snapshot.
// Later shadow/thread rewrites strip primary credentials at the actual Responses boundary.
if (!callerAuthorizationRoute || (settledRoute && !isCanonicalOpenAiForwardProvider(settledRoute.provider))) {

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P2 Badge Avoid claiming native main when no sidecar is needed

For every unchanged keyless Cursor Chat request, including ordinary text requests with sidecars disabled or no usable OpenAI candidate, this condition now calls tryClaimNativeMainProfileForTurn before sidecar need is evaluated. That claim remains attached to the turn even when getMainAccountToken() returns null, so a long-running Cursor request that never accesses OpenAI can make /api/native-main-profiles/switch wait for its deadline and return MAIN_REQUESTS_ACTIVE, while also fencing new native-main traffic. Gate the claim and credential snapshot on the request actually requiring an OpenAI vision/search sidecar.

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Approved the two-file delta at 4a201df against #4102 parent 3af5402.

This restores optional stored-main sidecar capture without reintroducing primary credential enrichment for a caller-auth transport. settledRoute is assigned before callerAuthorizationRoute becomes true, so the guard does not have the suggested true-caller-auth/null-settledRoute hole. The stored credential is captured only after the existing turn claim; the primary header write remains gated by !callerAuthorizationRoute && !routeMayChangeCredentialDomain. Downstream sidecar resolution rechecks the snapshot separately from primary auth.

The owned/fenced integration cases observe both destinations and claim lifetime: stored main only reaches the OpenAI sidecar, the Cursor capture sees only the independent Cursor bearer, a fenced profile causes no sidecar request, and the claim count returns to zero. The fixture's expected 502 is explained and does not substitute for these wire assertions.

Verified contributor run 34339651388 at this exact SHA: success, including Windows and macOS control. No local live credentials were used. Please include this delta in the #4102 integration; the parent on its own still omits this supported sidecar path.

@lidge-jun
lidge-jun merged commit 4a201df into lidge-jun:codex/pr4081-credential-scope-carry Sep 9, 2026
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