Prompt #158

Diagnose Flight Recorder AP4 Anomaly

Analysis · openai/gpt-4.1

5/5

Variables: anomaly_entry, entry_id
Tags: stack-aware,rag-stack,flight-recorder,ap4,audit,tamper-detection,security
Source: research-2026-05-01-stack-aware
Use count: 0
Created: 2026-05-01T18:30:48.776731+00:00
Updated: 2026-05-01T18:30:48.776731+00:00

Content

Diagnose an anomalous entry in the AP4 tamper-evident flight recorder audit log.

Log location: /var/log/agent-flight-recorder.jsonl (append-only JSONL)
Tool: bin/flight-recorder (AP4 — tamper-evident, HMAC-signed entries)

Anomalous entry to investigate:
{anomaly_entry}

Investigation steps:
1. Verify HMAC signature: `bin/flight-recorder verify --entry-id {entry_id}`
   → FAIL means tampering; escalate immediately to agent-human
2. Check timestamp drift: compare ts field with adjacent entries
3. Cross-reference with orchestrator run logs: /var/log/orchestrator/<run-id>/state.json
4. Identify agent role from entry.agent field; check /etc/gitea-tokens/ for active token
5. If tool_chain_violation detected: agent read sensitive path then called external tool
   → AP3 auto-blocked, but log why the request even reached that point

Escalation path if tampering confirmed:
- Create decision-pending issue in ubuadmin/rag-stack
- Labels: decision-pending, agent-human, priority-high, status-ready
- Body: anomaly_entry + analysis + recommended lockdown steps