- Add AgentRuntime struct to track tmux session status
- Implement discoverGlobalAgents() for Mayor/Deacon
- Implement discoverRigAgents() for witness/refinery/crew/polecats
- Update text output to show ✓ running / ✗ stopped for each agent
- Color-code status: green for running, red for stopped
- Include hook info inline with agent status
- JSON output includes full runtime state in 'agents' field
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>