Distillation

Date: Sep 16, 2026

• 🔴 (22:46) User provided additional code from packages/gateway/src/pipeline.ts, covering approximately lines 8932-10086 and Responses streaming validation, item-reference lifecycle checks, recall handling, keepalives, output-index management, terminal output assembly, SSE framing, and cancellation.
• 🔴 (22:46) packages/gateway/src/pipeline.ts:9479 defines ReferenceLifecycle exactly as type ReferenceLifecycle = { id: string; done: boolean };.
• 🔴 (22:46) Response item-reference validation throws invalid Responses item_reference lifecycle for index ${outputIndex} when lifecycle state is invalid.
• 🔴 (22:46) packages/gateway/src/pipeline.ts:9609 sets KEEPALIVE_INACTIVITY_MS = 30_000.
• 🔴 (22:46) The Responses stream parser uses JSON.parse(data) as Record<string, unknown>.
• 🔴 (22:46) Recall processing stores the callback result as let result: Awaited<ReturnType<typeof opts.onRecall>>.
• 🔴 (22:46) Responses output-index validation throws Responses output_index overflow.
• 🔴 (22:46) Responses identity and stream-consistency guards include errors Responses in-progress event changed response identity, Responses terminal event changed response identity, and Responses terminal output changed streamed item.
• 🔴 (22:46) The shown Responses event construction includes statuses in_progress, completed, and failed, plus event type response.output_text.done.
• 🔴 (22:46) Final Responses output is assembled in finalOutput with type Array<{ index: number; item: Record<string, unknown> }>.
• 🔴 (22:46) SSE output framing appends each frame as `${frame}\n\n` and includes cancellation-aware logic using cancelled.