Distillation

Date: Sep 16, 2026

• 🟡 (13:47) The additional packages/gateway/src/pipeline.ts excerpt (lines 9019–10008) shows Responses API stream completion and validation logic: it parses JSON stream data, validates terminal response structure and statuses including "cancelled", reconciles streamed output with response.output, and applies stricter output-index matching when opts.validation === "public".
• 🟡 (13:47) The excerpt tracks output-content lifecycle state, including whether parts were added or completed, invokes onSynthesizedDone?.(outputIndex, actual) when a missing done event must be synthesized, and tracks reference items through type ReferenceLifecycle = { id: string; done: boolean }.
• 🟡 (13:47) Recall-aware completion uses a completionAttempted guard, calls opts.runFollowUp, logs failures as openai-responses recall-aware onComplete error:, and obtains a final-round reason from input.finalRecallRound ? recallBudget.stopReason() : undefined.
• 🟡 (13:47) Final response synthesis includes "response.output_item.done" events, aggregates usage with res.usage ?? ZERO_USAGE, preserves terminalResponse?.incomplete_details, emits an "incomplete" final status with an incomplete reason when applicable, and sorts output indices numerically with .sort((a, b) => a - b).
• 🟡 (13:47) The excerpt serializes SSE frames by appending each frame as ${frame}\n\n to the output and removes the abort listener with signal.removeEventListener("abort", onStreamAbort) during cleanup.