Distillation

Date: Sep 16, 2026

• 🟡 (12:19) Gateway typecheck failed with TS2304: Cannot find name 'maxSparseIndex' at src/pipeline.ts(10298,17) and src/pipeline.ts(10977,31); pnpm exited with status 2.
• 🟡 (12:20) Assistant diagnosed the typecheck failure as a mechanical scope issue: recall-aware Codex normalization derived the sparse ceiling inline instead of exposing maxSparseIndex. Fix applied in packages/gateway/src/pipeline.ts: define/reuse the request-local Math.min(maxSSEFrames, DEFAULT_MAX_SSE_FRAMES) ceiling for failure prevalidation.
• 🟡 (12:23) After the scope fix, @loreai/gateway@0.40.0 typecheck (tsc --noEmit) passed. Focused Vitest v4.1.8 results: 2 test files passed; 6 tests passed, 435 skipped, 441 total; duration 13.67s.
• 🟡 (12:24) Assistant found that malformed raw failure usage was previously left to applyResponsesEvent(), allowing terminal fields to begin mutating before usage validation. Fix: moved validateResponsesUsage(parsed.response.usage, "malformed Responses usage") into shared failure prevalidation; absent usage remains accepted for diagnostic aliases.
• 🟡 (12:24) Assistant expanded shared failure validation to cover every accepted alias, including response.failed, failed/cancelled response.done, error, and response.error; exact categorical-log assertions were added for principal diagnostics and failed continuations.
• 🟡 (12:25) Changes were applied to packages/gateway/src/stream/openai-responses.ts, packages/gateway/test/openai-responses-recall-aware-stream.test.ts, and packages/gateway/test/openai-responses-stream.test.ts.
• 🟡 (12:26) Both complete provider stream suites passed after unified validation: 2 test files passed, 441/441 tests passed; duration 9.95s.
• 🟡 (12:27) Assistant added a plain-stream response.in_progress projection regression case to packages/gateway/test/openai-responses-stream.test.ts, ensuring the shared trusted-projection helper is guarded in both plain and recall-aware live routes.
• 🟡 (12:29) Formatting completed in 330ms across 4 files. The focused projection/failure matrix passed: 2 test files passed; 12 tests passed, 430 skipped, 442 total; duration 17.66s.
• 🟡 (12:30) Mutation proof 1 changed projectResponsesInProgressEvent() to return the raw in-progress frame. Both route guards failed as intended: plain streaming leaked private-plain-in-progress-model, and recall-aware streaming leaked private-visible-in-progress-model; 2 tests failed and 440 were skipped. The mutation was then restored.
• 🟡 (12:31) Mutation proof 2 reinstated raw terminal identity/model checks in the shared prevalidator. The plain-route test uses created metadata and failure usage in the plain streaming route failed as intended with Error: malformed Responses terminal event, and logs changed from the required openai-responses provider failure to passthrough stream-error output. The mutation was then restored.
• 🟡 (12:33) Mutation proof 3 suppressed the fixed categorical log at all accepted settlement points in packages/gateway/src/stream/openai-responses.ts and packages/gateway/src/pipeline.ts. All 10 accepted-failure route cases failed as intended: 3 plain-stream cases and 7 recall-aware cases, with 432 tests skipped.
• 🔴 (12:33) User requires recall-only handling to “never convert a failed continuation into completed.”
• 🟡 (12:33) The categorical-log mutation specifically proved coverage for: principal response.failed with failed; principal response.failed with cancelled; principal response.done with failed; principal response.done with cancelled; principal error; principal response.error; failed recall continuation; plain failure with created metadata/usage; plain error; and plain response.error.
• 🟡 (12:34) Assistant restored the three settlement logs using the exact fixed message openai-responses provider failure in packages/gateway/src/stream/openai-responses.ts and packages/gateway/src/pipeline.ts.
• 🟡 (12:35) The complete provider stream matrix passed after restoration: 2 test files passed, 442/442 tests passed; duration 13.00s. Coverage included diagnostics, malformed aliases, non-monotonic sequences, backpressure, and continuation failures.
• 🟡 (12:35) Working-copy audit showed exactly 4 modified files: packages/gateway/src/pipeline.ts, packages/gateway/src/stream/openai-responses.ts, packages/gateway/test/openai-responses-recall-aware-stream.test.ts, and packages/gateway/test/openai-responses-stream.test.ts; diff size was 364 insertions and 27 deletions.
• 🟡 (12:35) Jujutsu working copy was lpmvqrur e57a76e7 fix(responses): unify provider failure handling, parent wswlsmrn 24880457 fix/responses-provider-failures | fix(responses): reject non-monotonic provider failures. Bookmark fix/responses-private-references had conflicts.
• 🟡 (12:36) Production diff added exported RESPONSES_PROVIDER_FAILURE_LOG = "openai-responses provider failure", projectResponsesInProgressEvent(), and validateResponsesProviderFailureTerminal() in packages/gateway/src/stream/openai-responses.ts.
• 🟡 (12:36) projectResponsesInProgressEvent() now emits trusted response.created state for id, created_at, and model; forces type: "response.in_progress", object: "response", status: "in_progress", and output: []; and preserves sequence_number when present.
• 🟡 (12:36) Public and Codex lifecycle validators remain strict for successful/incomplete terminals, but allow response.in_progress model metadata to differ because it is ignored and replaced by trusted created-state projection before forwarding.
• 🟡 (12:36) Shared raw failure prevalidation now verifies alias/type agreement, prior response.created, sanitized public/Codex lifecycle validity, raw failure status/error/usage, sparse limits, and source-sequence monotonicity before terminal state mutation. Failed aliases alone ignore raw terminal identity/model/time/output; successful and incomplete terminals remain unchanged and strict.
• 🟡 (12:36) Recall-aware principal and continuation settlement call validateResponsesProviderFailureTerminal() before lifecycle mutation, then emit exactly RESPONSES_PROVIDER_FAILURE_LOG. Plain/buffered accumulateResponsesSSEStream uses the same ordering and projects response.in_progress before invoking onValidatedEvent.
• 🟡 (12:36) Assistant started a planned six-file provider integration matrix covering routing, accounting, persistence, cancellation, Codex, and both streaming modes; no result was reported in this segment.