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-dashboard/commands/status.md

@@ -0,0 +1,30 @@
+---
+description: One-line Agent Monitor health + counts summary from /api/stats
+---
+
+Fetch the dashboard stats and print a single-line health summary.
+
+Run:
+
+```bash
+curl -s -m 5 http://localhost:4820/api/stats
+```
+
+Then print exactly one line summarizing health and key counts from the JSON,
+in this shape:
+
+```
+✅ UP | 127 sessions | 3 active | 1 agents | 4,892 events | 42 today | 2 ws
+```
+
+Pull the numbers from these fields: `total_sessions`, `active_sessions`,
+`active_agents`, `total_events`, `events_today`, `ws_connections`.
+
+If the `curl` command fails (non-zero exit, empty body, or unparseable JSON),
+print instead:
+
+```
+❌ DOWN | dashboard not reachable at http://localhost:4820 — start it with `npm start` from the repo root
+```
+
+Do not modify any data. Output only the single summary line — no preamble.