Every gt command now touches .gastown/keepalive.json with the last
command and timestamp. This enables smarter daemon backoff:
- Fresh (< 2 min): agent is working, skip heartbeat
- Stale (2-5 min): might be thinking, gentle poke
- Very stale (> 5 min): likely idle, safe to interrupt
Uses PersistentPreRun hook to capture all commands including subcommands.
Closes gt-bfd
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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