Distillation

Date: September 16, 2026

• 🟡 (22:35) Continued read-only diff inspection covered packages/gateway/src/pipeline.ts validation and reconciliation paths around safe integer indexes, sparse content_index limits, exact reasoning-part type checks via assertExactReasoningPart(part, "summary_text", "reasoning summary"), final-content array validation, incomplete delta/value lifecycle detection, and identity matching through referenceIdentities, item.id, item.callId, and synthetic IDs.
• 🟡 (22:35) Continued inspection covered nested continuation/recall handling using PendingResponsesRecall[], contState.items, existing.id, and existing.call_id, including continuation-index processing and state reconciliation.
• 🟡 (22:35) Test diff inspection showed continuation stress/boundary coverage using continuationItemCount, asserting output contains continuation ${continuationItemCount - 1}, plus nested follow-up generation through makeNestedFollowUp() and a "call_ceiling_nested" case.
• 🟡 (22:35) Test fixtures included response.output_item.done, reasoning-summary delta text "tracked summary", no-op onComplete: () => {}, and iterator instrumentation through originalValues.call(this).