A real Futsu run folder (.futsu/runs/8f3a21/), exactly as the engine writes it:

  state.json     full run snapshot — atomic write (tmp + rename)
  events.ndjson  append-only event log, monotonic ids, UTC ISO-8601 timestamps

Try:
  grep step.completed events.ndjson
  jq '.nodes | keys' state.json
  jq '.cost_usd' state.json

PTY logs (one per CLI-agent node) are omitted here for size; in a real run you
will also find claude-code.pty.log and codex.pty.log beside these files.
