witness-observerlisted

# Witness Observer Per-rig observer that monitors polecat health and reports anomalies. The witness is the PMU (Performance Monitoring Unit) of the Gastown chipset -- it watches execution units for stalls, detects degraded performance, and raises alerts without interfering with computation. The witness is strictly read-only with respect to agent work. It observes and reports; it never modifies. ## Activation Triggers This skill activates when: - The agent is assigned to monitor a rig's worker agents - Multiple polecats are running and health monitoring is needed - Stall detection is required for long-running work items - The mayor needs a supervisory agent to watch active polecats ## Core Capabilities ### Patrol Loop The witness runs a periodic patrol that checks all active agents in its rig for health indicators. **Patrol cycle:** ``` SCAN EVALUATE ACT WAIT | | | | v v v v list agents -> check each -> nudge/escalate -> sleep interval (active ones) for stalls if needed (default 5 min) ``` **Implementation:** ```typescript const state = new StateManager({ stateDir: '.chipset/state/' }); const patrolInterval = 5 * 60 * 1000; // 5 minutes (configurable) const stallThreshold = 30 * 60 * 1000; // 30 minutes (configurable) async function patrol(): Promise<void> { // Get all agents that should be working const agents = await stat