Distillation

Date: Sep 16, 2026

• 🔴 (17:07) User required that response-side item_reference lifecycle events never be forwarded.
• 🟡 (17:07) packages/gateway/test/openai-responses-recall-aware-stream.test.ts already contains test "never forwards response-side item_reference lifecycle events" at line 1978; it asserts streamed output and completedResponse contain no item_reference.
• 🟡 (17:07) Existing recall-aware stream tests include: "rejects an item_reference missing output_item.done" at line 2022, "redacts a sparse call replaced by a terminal item reference" at line 2775, "rejects reuse of an item_reference output index" at line 3793, "rejects reuse of an item_reference index in a continuation" at line 4203, "rejects reference identities reused by later output items" at line 4602, and "rejects reference identities colliding with synthetic markers" at line 4639.
• 🔴 (17:08) User required every accepted event, including private reference events, to always accumulate into internal state for postResponse before suppression or other handling.
• 🟡 (17:08) Existing principal SSE processing in packages/gateway/src/pipeline.ts calls applyResponsesEvent(state, event, parsed) around lines 10235–10236 under the explicit invariant comment: Always accumulate into the internal state for postResponse.