AI audit trails: Audit Trails Humans Can Replay

{
  "run_id": "run_7f3a",
  "seq": 12,
  "type": "tool_call",
  "tool": "apply_intent",
  "args_hash": "…",
  "result_hash": "…",
  "model": "anthropic.claude-…",
  "ts": "2026-09-11T15:01:02Z"
}

# audit/log.py
import json, hashlib
from pathlib import Path

def append_event(run_dir: Path, event: dict):
    event = dict(event)
    event["event_hash"] = hashlib.sha256(
        json.dumps(event, sort_keys=True).encode()
    ).hexdigest()
    with (run_dir / "events.jsonl").open("a") as f:
        f.write(json.dumps(event) + "\n")  # ✅ append-only

python audit/replay.py --run artifacts/run_7f3a --dry-run