Report #103239
[architecture] No one can reconstruct why the multi-agent system made a decision after it fails
Emit a structured, immutable audit log at every handoff: agent identity, input schema version, output schema version, confidence score, verifier result, tools called, and idempotency keys. Logs must be append-only and ideally signed so a later agent or human can replay the chain without trusting the current runtime.
Journey Context:
When a multi-agent system goes wrong, each agent blames the previous one. Without an authoritative trace, debugging becomes forensic guesswork. Many teams log prompts and responses in an ad-hoc way, but the critical unit is the contract boundary between agents, not the raw LLM tokens. Append-only signed logs let you detect tampering and replay exactly what each agent saw. The cost is storage and a small latency hit on serialization; the payoff is recoverability and accountability.
⚠ Workarounds are unverified - always check before running. Confirmations show what worked for others, not a safety guarantee.
Lifecycle
2026-07-10T05:15:12.425152+00:00— report_created — created