fix(responses): backfill missing status and created_at for strict decoders - #2639
fix(responses): backfill missing status and created_at for strict decoders#2639bet4it wants to merge 2 commits into
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Included review availability: Your plan provides up to 10 included reviews per hour; 8 remain after this review. 📝 WalkthroughWalkthroughThe response field backfill adds missing message-item statuses and response-level ChangesResponse field backfill
Estimated code review effort: 3 (Moderate) | ~20 minutes Merge Risk: ⚪ Minimal · up to The change backfills missing response status and creation timestamps to prevent strict-decoder failures, with targeted tests passing and no actionable merge-blocking risk remaining beyond normal checks and review. Sequence Diagram(s)sequenceDiagram
participant SSERewrite
participant rewriteEvent
participant backfillResponseOutput
SSERewrite->>rewriteEvent: pass one stream timestamp
rewriteEvent->>backfillResponseOutput: pass response or event-inferred status
backfillResponseOutput-->>SSERewrite: emit rewritten response event
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리뷰 · 우선순위 64 / 80설명 이 보정기는 실제 통과 경로에도 이미 알맞게 연결되어 있습니다. 스트리밍 응답은
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Ingwannu
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The backfill belongs in the right module, but status inference is currently too coarse. response.output_item.added and snapshots in response.created can receive completed even though deltas are still expected. Infer status from event/response phase: added/created should remain in_progress, done/completed should be completed, and incomplete terminals should remain incomplete.
Also capture the fallback created_at once per stream-rewriter instance (and once per JSON rewrite), rather than calling Date.now for each event, so one response cannot acquire different creation timestamps over a long stream. Add regressions for output_item.added, response.created, incomplete status, existing-value preservation, and stream-wide timestamp identity.
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Actionable comments posted: 2
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Inline comments:
In `@src/server/responses/responses-field-backfill.ts`:
- Around line 267-270: Normalize responseStatus before passing it to
backfillResponseOutput: map response lifecycle values such as “failed” to a
valid OutputMessage status (“incomplete”), preserve supported message statuses,
and use an explicit valid fallback for unmapped values. Apply this only to
response-level SSE events in the existing response status inference flow.
In `@tests/responses-field-backfill.test.ts`:
- Around line 591-629: Make the “created_at stays consistent across events in
the same stream” test deterministic by creating its rewrite factory within the
test, mocking Date.now before factory creation, and advancing the mocked time by
at least 1,000 ms between applying the created and completed events. Restore
Date.now in a finally block while preserving the assertion that both outputs
share the same created_at value.
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Actionable comments posted: 1
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Inline comments:
In `@src/server/responses/responses-field-backfill.ts`:
- Around line 338-340: Update the non-streaming backfill call in the response
repair flow to pass messageStatusFromResponseStatus(response.status) ??
"completed" instead of always using "completed"; preserve the fallback for
unsupported statuses and add a JSON regression test covering an incomplete
response with an output message missing status.
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abhisheksharma2411
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Careful work, and the same class of fix as #1941/#2142 done the same way — preserve when present, synthesize only when absent, return the same object reference when nothing changed so the no-op path stays allocation-free. The if ("status" in item) return item check is the right shape: a present-but-odd value is upstream's to own, not ours to correct.
Two things I checked because they're the usual traps here, and both are clean — worth saying so you don't get asked:
created_atis seconds, not milliseconds.Math.floor(Date.now() / 1000)on both paths. Au64a thousand times too large would decode fine and be wrong forever, so this is the detail I'd have gone looking for first.- The factory is per-request, not per-process.
createResponsesFieldBackfillBlockRewrite()is called insidehandleResponsesInner(core.ts:3937), so "captured once per rewrite factory" means once per stream. If it were hoisted to module scope every response for the process lifetime would carry the boot timestamp. It isn't. Might be worth a word in the docstring pinning that requirement, since the correctness of the comment depends on a call site in another file.
Where I'd push back is response.failed → completed.
inferredStatusForEventType falls through to "completed" for any unmatched event type, and messageStatusFromResponseStatus("failed") returns null, so the fallback wins. The test pins it deliberately:
// "failed" is not a valid OutputMessage status; the backfill should have
// fallen back to the event-type inference (completed for response.failed).
expect(parsed.response.output[0].status).toBe("completed");I agree entirely with the first half — failed must not be written to OutputMessage.status. It's the choice of replacement I'd question. On response.failed the message demonstrably did not complete; the fixture's own text is "partial". incomplete is the exact word the schema provides for "generation stopped before finishing", and it's already in the accepted set.
The distinction matters more here than it would in most code because this is a passthrough path. Backfilling annotations: [] or a synthetic id is safe precisely because the value is uncontroversial — it carries no claim. status: "completed" does carry a claim, and it's a claim the upstream never made and that happens to be false. A client branching on status === "completed" to decide whether to render a message as final, persist it, or stop waiting will treat a truncated message as whole. That's a worse failure than the decode error being fixed, because it's silent.
Concretely, I'd map at the response-status layer rather than the event-type layer:
function messageStatusFromResponseStatus(status: string): string | null {
if (status === "in_progress" || status === "completed" || status === "incomplete") return status;
// A response that failed or was cancelled did not finish generating its
// message. `incomplete` is the message-level equivalent; `completed` would
// assert something the upstream never claimed.
if (status === "failed" || status === "cancelled") return "incomplete";
return null;
}and flip inferredStatusForEventType to return "incomplete" for response.failed so the two agree when the response status is absent too. That keeps every existing test green except the one asserting completed, which would become the assertion that this is incomplete.
If completed was chosen because a client somewhere chokes on incomplete, that's a fair reason and worth putting in the comment — right now the comment explains what the code does but not why completed beat incomplete, and that's the decision a future reader will want.
Everything else looks right to me, including not touching non-message items and the per-stream created_at consistency test.
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Ingwannu
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Reviewed exact head aa385f9746fed35a9ec1bd249dff65891c2d23cd. The focused field-backfill suite is now correct (37/37 passed locally in the isolated PR worktree), and the previous lifecycle/status blockers appear resolved. The current exact-head full CI still has one deterministic integration failure, however: run 33032444280, job test 4/4 (98392954733).
tests/server-combo-failover-e2e.test.ts:1323 still requires the backup Responses JSON to equal the upstream fixture byte-for-byte. This PR intentionally adds created_at at the response level and status: "completed" to the message item, so that existing assertion now fails with exactly those new fields. Update this integration regression to assert the intended backfilled shape while preserving the actual purpose of the test: the backup response content/model/usage must remain exact apart from the documented compatibility backfill. Because created_at is generated, assert its valid integer shape or control time deterministically rather than hard-coding the wall clock.
Please rerun exact-head CI after updating the integration expectation. I am keeping changes requested until every required shard is green; this is a test-integration blocker, not a new objection to the backfill design.
…oders Follow-up to lidge-jun#2142. Two more required fields cause the same strict-decoder crash on the Responses passthrough path when an upstream relay omits them: OutputMessage.status (no #[serde(default)] in the async-openai fork) and Response.created_at (u64, no default). Status is inferred from event context: output_item.added gets in_progress, output_item.done gets completed, and response-level events derive it from the response status field or the event type itself (created/in_progress → in_progress, completed → completed, incomplete → incomplete). created_at is captured once per rewrite factory so every event in the same stream agrees, even across a second boundary. Both backfills are wired through backfillOutputItem / backfillResponseOutput, covering SSE and bounded-JSON passthrough. Existing values are never overwritten. The translation path (bridge.ts) already emits both fields.
The passthrough backfill adds response-level created_at when the upstream omits it, so the cross-adapter exact-match assertion gains one generated field. Assert its integer shape, drop it, and keep the byte-for-byte requirement for everything else.
…rge round Compile-gates all 12 PRs in isolated worktrees, which the draft-PR CI does not do, and assigns each to a disposition lane. Two PRs are not what their status says: - lidge-jun#2694 is review-ready with green checks and does not compile (5 tsc errors, including a call to a function defined nowhere). - lidge-jun#2693 is a test-only diff whose test fails on its own branch; the implementation was never written. lidge-jun#2639 is a real fix carrying a real regression: its created_at backfill breaks the byte-exact passthrough assertion in tests/server-combo-failover-e2e.test.ts:1323.
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`queued` is a real Responses lifecycle status — the response exists but has not started generating. It is neither a valid OutputMessage status nor listed in the event-type table, so it fell through to the `completed` default and marked an unstarted message as finished. That is the exact overclaim messageStatusFromResponseStatus was written to prevent: it maps failed/cancelled to `incomplete` rather than `completed` precisely so a client cannot treat an unfinished message as whole. `queued` slipped past the same reasoning. Found by the independent reviewer auditing the #2639 cherry-pick, not by the original PR or its tests. Proven load-bearing: removing either line fails 2 of the 35 cases.
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Partially landed on Taken as-is: the Not taken: the Two real contracts collide — "relay this verbatim" and "add the field the upstream omitted" — and which one yields is a decision worth making deliberately rather than folding in beside One defect found while reviewing: Closing since the correct half is on |
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Summary
Follow-up to #2142. That PR backfilled the required
idfield on output items. After it merged, grok-build still fails with two more strict-decoder errors on the Responses passthrough path:serialization error: missing field status— some upstream relays omitstatuson message output items.OutputMessage.statusis a requiredOutputStatus(no#[serde(default)]) in the async-openai fork that grok-build pins (rev95b52eb).serialization error: missing field created_at— some upstream relays omitcreated_aton theResponseobject inresponse.created/response.completedevents.Response.created_atis a requiredu64(no#[serde(default)]).Both are the same class of problem as
annotations(#1941) andid(#2142): a required field with no serde default, omitted by a relay that theopenai-responsespassthrough adapter forwards verbatim. The translation path (bridge.ts) is unaffected —closeCurrentMessagealready emitsstatus: "completed", andresponseSnapshotalready emitscreated_at.What changed
backfillItemStatus(responses-field-backfill.ts): addsstatusto output items whentype === "message"and the field is absent. Only message items carry this field in the Responses schema; reasoning, function_call, and other item types do not. The value is inferred from the event context:output_item.added→in_progress(the item is still being generated)output_item.done→completedresponse.created,response.completed, etc.) → derived from the responsestatusfieldExisting values are never overwritten.
created_atbackfill (inbackfillResponseOutput): addscreated_atto the response object when absent. The timestamp is captured once per rewrite factory (SSE path) or once per call (JSON path), so every event in the same stream carries the same value, even if the stream spans a second boundary.Both backfills are wired through
backfillOutputItem/backfillResponseOutput, so they cover the SSE block rewrite path (createResponsesFieldBackfillBlockRewrite) and the bounded-JSON passthrough path (backfillResponsesFieldsJson) simultaneously.Verification
bun test tests/responses-field-backfill.test.ts— 34 pass, 0 fail (28 existing + 6 new: backfill in_progress on output_item.added, backfill in_progress on response.created, backfill incomplete on response.incomplete, created_at consistency across events in the same stream, plus the existing status/created_at tests).bun x tsc --noEmit— no new errors (3 pre-existing errors inclaude-messages.tsandfetch-helpers.tsare unchanged onorigin/dev).Checklist
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Bug Fixes
created_atis missing.Tests