feat: Claude Code Monitor — lanes, pipelines and a merged workspace

Internal SmartGift build of a Claude Code monitoring dashboard.

Lanes: a durable unit of parallel agent work, one per working directory,
tracked across session restarts. Managed lanes are git worktrees the
dashboard provisions and can reset or remove behind a three-check destroy
guard and a counted preflight; adopted lanes are directories you already
own and are never destroyable.

Pipelines: a lane moves through pipeline stages. A stage the agent declares
with evidence renders green; a stage inferred from the tool-event stream
renders dashed amber and never counts as done. Detection is forward-only
within a 30-minute window, and never writes the declared stage.

Workspace: one page at /run with a lane grid, the selected lane's pipeline,
and a full Claude console behind a disclosure.

plugins/ccam-quality/commands/health.md

@@ -0,0 +1,31 @@
+---
+description: One-line reliability verdict (OK / DEGRADED / FAILING) for Claude Code usage
+---
+
+Print a single reliability verdict for Claude Code usage from the Agent Monitor
+dashboard at `http://localhost:4820`. No arguments.
+
+1. Fetch state:
+   ```bash
+   curl -s http://localhost:4820/api/stats
+   curl -s http://localhost:4820/api/analytics
+   ```
+   From `stats`: `total_events`, `events_today`, `sessions_by_status`. From
+   `analytics`: `event_types` (PreToolUse, PostToolUse, APIError).
+
+2. Derive two reliability signals:
+   - **Error rate** = `APIError / total_events` (percentage, 2 decimals).
+   - **Tool-failure rate** = `(PreToolUse − PostToolUse) / PreToolUse` (percentage).
+
+3. Pick the verdict from the worse of the two signals:
+   - **OK** — error rate ≤ 1% and tool-failure rate ≤ 1%.
+   - **DEGRADED** — either is in 1–5%.
+   - **FAILING** — either exceeds 5%.
+
+4. Print exactly one line:
+   `Reliability: <OK|DEGRADED|FAILING> — errors X.XX%, tool failures Y.YY% (N events)`
+   Prefix with ✅ (OK), ⚠️ (DEGRADED), or ❌ (FAILING).
+
+Output rules: cite only fields the API returned — never fabricate. One line only;
+no extra prose. If `curl` cannot reach `http://localhost:4820`, print
+`Reliability: UNKNOWN — dashboard unreachable; start it with \`npm start\` from the repo root.`