Add 5 pi extensions: pi-subagents, pi-crew, rpiv-pi, pi-interactive-shell, pi-intercom

extensions/pi-crew/skills/observability-reliability/SKILL.md

@@ -0,0 +1,41 @@
+---
+name: observability-reliability
+description: Metrics, diagnostics, correlation, retry, deadletter, and recovery evidence workflow. Use when adding reliability features or investigating failures.
+---
+
+# observability-reliability
+
+Use this skill for reliability and observability work.
+
+## Source patterns distilled
+
+- `src/observability/*` — metric registry, retention, sinks, exporters, event-to-metric mapping
+- `src/runtime/retry-executor.ts`, `deadletter.ts`, `diagnostic-export.ts`, `recovery-recipes.ts`, `overflow-recovery.ts`, `heartbeat-gradient.ts`
+- `docs/research-phase9-observability-reliability-plan.md`
+
+## Rules
+
+- Metrics should be per-session/per-registry where possible; avoid hidden global singletons.
+- Use low-cardinality labels. Avoid raw task titles, prompts, full file paths, or secrets in metric labels.
+- Redact secrets before writing logs, events, diagnostics, agent output, or exported bundles.
+- Correlate events with runId/taskId and timestamps; include enough context for postmortem without exposing secrets.
+- Retry should record attempts and deadletter on exhaustion; default auto-retry should remain conservative.
+- Diagnostics should be safe to share: include state summary, recent events, metrics snapshot when available, and paths to artifacts.
+- Heartbeat classification should be threshold-based and should ignore terminal tasks/runs.
+- Overflow recovery should track phase progression and terminal states without repeatedly alerting on completed work.
+
+## Anti-patterns
+
+- High-cardinality Prometheus labels.
+- Emitting duplicate noisy health notifications every render tick.
+- Writing unredacted Authorization/API key/token values into events or artifacts.
+- Treating secondary metrics as primary pass/fail unless catastrophic.
+
+## Verification
+
+```bash
+cd pi-crew
+npx tsc --noEmit
+node --experimental-strip-types --test test/unit/metric-registry.test.ts test/unit/event-to-metric.test.ts test/unit/diagnostic-export.test.ts test/unit/retry-executor.test.ts test/unit/deadletter.test.ts
+npm test
+```