feat(config): opt-in drop of Codex safety-buffering hints (headers + SSE) - #3652
feat(config): opt-in drop of Codex safety-buffering hints (headers + SSE)#3652itismyfield wants to merge 3 commits into
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Add `dropCodexSafetyBufferingHeaders` (default false). When enabled, the Codex Responses passthrough strips `x-codex-safety-buffering-enabled` and `x-codex-safety-buffering-faster-model` before relaying the upstream response. The Codex TUI renders those hints as a "Hang tight or retry with a faster model" prompt whose default action switches the session to the weaker model. For an unattended session driven over tmux, a stray Enter while that prompt is open silently downgraded the model (gpt-6-astra/ultra -> gpt-5.6-luna/low). Codex itself exposes no toggle for the prompt, so the proxy is the only place to suppress it. Every other `x-codex-*` header (quota, reset-at, turn-state) still passes through, and the option is off unless set explicitly; a malformed value is rejected by config validation like `emptyCompletionRetry`. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
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drafts: true📝 WalkthroughWalkthroughAdds an opt-in ChangesCodex safety-buffering filtering
Estimated code review effort: 3 (Moderate) | ~20 minutes Merge Risk: 🟡 Moderate · up to When enabled, this option can strip safety_buffering data from non-Codex custom Responses providers even though it is intended only for Codex passthroughs. Scope the filter to the Codex provider and correct the English and translated documentation before merge. Sequence Diagram(s)sequenceDiagram
participant CodexResponsesUpstream
participant ResponsesCore
participant sanitizePassthroughHeaders
participant createSseTerminalOutputBoundary
participant CodexClient
CodexResponsesUpstream->>ResponsesCore: passthrough response
ResponsesCore->>sanitizePassthroughHeaders: headers and filter options
sanitizePassthroughHeaders-->>ResponsesCore: filtered headers
ResponsesCore->>createSseTerminalOutputBoundary: SSE frames and filter options
createSseTerminalOutputBoundary-->>CodexClient: filtered SSE stream
🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 40.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 15 functions across 8 files. (1 skipped: 1 unsupported.) ✨ Finishing Touches🧪 Generate unit tests (beta)
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리뷰 · 우선순위 61 / 80이 PR은 top-level 설정 현재 범위는 작고 테스트도 초점 있습니다.
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너의 추천 이 댓글은 grok-bot이 작성했습니다 |
The "retry with a faster model" prompt is not driven by the response headers alone. codex-api/src/sse/responses.rs builds SafetyBuffering from the SSE body: a `response.metadata` event whose metadata.type is "safety_buffering", or a `safety_buffering` field on any other event; the headers only supply the faster-model name when the body has no `retry_model`. Dropping the headers therefore still showed the prompt. Rename the option to `dropCodexSafetyBuffering` and make it cover both: - headers: unchanged behaviour from the previous commit - SSE: createSseTerminalOutputBoundary takes the same filter options; the metadata event is dropped whole and the field is stripped from other events, so the carrying event is otherwise relayed unchanged - both native passthrough relays (relaySseEagerBounded and relaySseWithFailedTail) receive the option from the responses core Default stays false: with the option absent or false every byte is relayed verbatim, locked by the new boundary tests.
itismyfield
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Inline comments:
In `@docs-site/src/content/docs/reference/configuration/server.md`:
- Line 18: Update the dropCodexSafetyBuffering documentation entry to clarify
that all other SSE event content passes through unchanged except for removal of
the safety_buffering field.
- Line 18: Update the translated Server configuration tables in ja, ko, ru, and
zh-cn to include dropCodexSafetyBuffering? with type boolean, default false, and
equivalent documentation of its safety-buffering header and SSE filtering
behavior, matching the English Server table.
In `@src/server/responses/core.ts`:
- Line 4736: Update the Responses passthrough handling around
isCanonicalOpenAiForwardProvider so codexSafetyBufferingFilterOptions(config) is
created only for canonical OpenAI forwarding providers, then reuse that scoped
value at all five sanitizePassthroughHeaders/SSE filtering call sites. Preserve
headers and matching response fields for non-Codex providers, and add a
regression test covering that behavior.
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📒 Files selected for processing (9)
docs-site/src/content/docs/reference/configuration/server.mdsrc/config.tssrc/server/index.tssrc/server/relay-eager.tssrc/server/relay.tssrc/server/responses/core.tssrc/types/config.tstests/responses/passthrough-headers.test.tstests/server/config.test.ts
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Summary
dropCodexSafetyBuffering(defaultfalse).x-codex-safety-buffering-enabled/x-codex-safety-buffering-faster-model(sanitizePassthroughHeaders, all three call sites inresponses/core.ts);createSseTerminalOutputBoundary, used by both native passthrough relaysrelaySseEagerBoundedandrelaySseWithFailedTail): aresponse.metadataevent whosemetadata.typeissafety_bufferingis dropped whole, and asafety_bufferingfield on any other event is stripped while the event is otherwise relayed unchanged.codex-rs/codex-api/src/sse/responses.rsthe prompt is built from the SSE body (safety_bufferingfield or the metadata event); the headers only supply the faster-model name when the body has noretry_model. Dropping the headers alone still shows the prompt (verified on codex-cli 0.153.4), hence the body filter in the second commit.x-codex-*headers and all other SSE events pass through unchanged. With the option absent orfalseevery byte is relayed verbatim (locked by tests).schema_invalid: dropCodexSafetyBuffering: ...), mirroringemptyCompletionRetry. Documented indocs-site/.../reference/configuration/server.md.safeResponseHeaders), so it never carried these headers; the/responses/compactrelay is left as is.Verification
bun run typecheck— clean.bun test tests/responses/passthrough-headers.test.ts tests/server/config.test.ts— 197 pass, 0 fail (header tests from commit 1; 2 new boundary tests: verbatim relay when off, drop/strip when on with other events untouched).bun test tests/server/relay-eager.test.ts tests/responses/passthrough-abort.test.ts— pass (source pin on therelaySseWithFailedTail(rewrittenBody, upstreamcall preserved).bun run test:changed— 14927 pass, 0 fail (779 files, 139s).bun run privacy:scan— passed.Checklist
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New Features
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