Distillation

Date: Sep 16, 2026

• 🔴 (15:42) User specified that failed usage/accounting never depends on client demand.
• 🟡 (15:42) Candidate diff strengthened Responses stream validation with terminalContentIndexByItem, responsesTerminalItemMatches(snapshot, accumulated), done-item tracking via doneItems, and explicit errors "malformed Responses stream event" and "incomplete Responses output lifecycle".
• 🟡 (15:42) Candidate diff handled completion through onComplete(finalizeResponsesAcc(state), successful) and represented provider-failure accounting records with status: "failed".
• 🟡 (15:42) Candidate tests used drain(client), captured error logs via error: (message) => capturedLogs.push(message), inspected terminal-frame data, and asserted completions had length 1.