Distillation

Date: Sep 16, 2026

• 🟡 (14:07) Responses streaming continuation code includes keepalive behavior matching streamResponsesPassthrough.
• 🟡 (14:07) Recall continuation admission failure throws new RecallContinuationFailure("depth_exhausted").
• 🟡 (14:07) Abort handling registers signal.addEventListener("abort", onAbort, { once: true }).
• 🟡 (14:07) Recall-budget accounting calls recallBudget.record(...) and captures its result as stopReason.
• 🟡 (14:07) Late stream-reader cleanup is implemented by the asynchronous cancelLateReader(): Promise<void> function.
• 🟡 (14:07) Response finalization uses finish(resp: GatewayResponse, successful: boolean): boolean.
• 🟡 (14:07) Usage processing accounts for ru.cacheReadInputTokens.
• 🟡 (14:07) Generated terminal response metadata uses terminalResponse?.created_at ?? Math.floor(Date.now() / 1000) as the creation timestamp.
• 🟡 (14:07) Recall-anchor filtering checks text blocks with parseRecallAnchor(block.text).
• 🟡 (14:07) Reconstructed response parts can use { type: part.kind, text: part.authoritativeValue }.
• 🟡 (14:07) The transformed Responses stream is constructed as new ReadableStream<Uint8Array>({...}).
• 🟡 (14:07) Principal-stream retry state is tracked with let principalTransportRetries = 0, and transport failures are identified using error instanceof SSEStreamTransportError.
• 🟡 (14:07) Stream filtering tracks output_index values belonging to suppressed recall function-call items.
• 🟡 (14:07) Hidden recall payload accounting adds unresolvedToolBytes.get(outputIndex) ?? 0 to hiddenRecallBytes.
• 🟡 (14:07) Responses event processing separately tracks recallIndices and unresolvedToolIndices, including checks for whether either set is nonempty.
• 🟡 (14:07) Outgoing Responses SSE events are serialized with formatResponsesEvent(event, data).