Distillation

Date: Sep 16, 2026

• 🔴 (15:57) User stated: “Always accumulate into the internal state for postResponse.”
• 🟡 (15:57) Candidate implementation diff validates Responses items and coordinates, including requiring outputIndex to satisfy Number.isSafeInteger(outputIndex), throwing invalid Responses ${description} item for invalid items, and throwing "Responses terminal output must be an array" when terminal output is not an array.
• 🟡 (15:57) Candidate implementation retrieves retained raw response items with acc.rawItems.get(outputIndex) and includes usage-merge validation through assertUsageMergeable(...).
• 🟡 (15:57) Candidate implementation tracks unresolvedToolIndices while revising hidden/unresolved tool-output handling and failure-response content filtering.
• 🟡 (15:57) Candidate tests include sparse-principal bounded-state coverage using item ID "fc_sparse_principal_limit"; they assert completedResponse?.rawOutputItems equals [] and streamed output does not contain "call_sparse_principal_limit".