Distillation

Date: Sep 16, 2026

• 🔴 (15:56) User stated the implementation must “never forwards response-side item_reference lifecycle events.”
• 🔴 (15:56) User stated the implementation must “never executes recall from an incomplete principal.”
• 🟡 (15:56) Candidate test changes in packages/gateway/test/openai-responses-recall-aware-stream.test.ts add response.reasoning_summary_text.done for reasoning item rs_0 with output_index: 0, summary_index: 0, and text "reasoned" before recallCall(1, { query: "architecture" }), strengthening the incomplete-principal recall regression scenario.
• 🟡 (15:56) Candidate test diff includes checks that materialized response items are retrieved from finalizeResponsesAcc calls via acc.rawItems.get(0), and that their expected parts have length scenario.partIndex + 1.
• 🟡 (15:56) Candidate test diff includes an assertion that streamed output contains exactly one event: response.failed.
• 🟡 (15:56) Candidate test additions exercise bounded retained response state using maxRetainedStateBytes, including an indexed-SSE-data-sized limit and a 128 * 1024 byte limit, plus scenarios covering many retained items and terminal usage flushing.