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-analytics/commands/cost-today.md

@@ -0,0 +1,26 @@
+---
+description: Quick total cost plus a per-model one-liner from the dashboard pricing engine.
+argument-hint: "[today|week]"
+---
+
+Print a quick cost snapshot from the Agent Monitor dashboard pricing engine.
+
+The user's scope is **$ARGUMENTS** (default `today` if empty; accepts `today` or `week`).
+
+Fetch the fleet-wide cost breakdown:
+
+```
+curl -s http://localhost:4820/api/pricing/cost
+```
+
+This returns `{ total_cost, breakdown: [{ model, input_tokens, output_tokens, cache_read_tokens, cache_write_tokens, cost, matched_rule }] }`.
+
+Then print, concisely:
+
+1. **Total cost** — `total_cost` as USD to 4 decimal places, labeled with the scope (`$ARGUMENTS`).
+2. **Per-model one-liners** — one line per entry in `breakdown`, sorted by `cost` descending:
+   `<model> — $<cost to 4dp> (in <input_tokens>, out <output_tokens>, cacheR <cache_read_tokens>, cacheW <cache_write_tokens>)`
+
+Keep token counts with thousands separators. No tables, no preamble — just the total and the per-model lines.
+
+Note: the endpoint returns lifetime totals; if the user asked for `today` or `week` and the data is not scoped, say so in one line rather than fabricating a windowed number. If the dashboard is unreachable, tell the user to start it with `npm start` from the repo root.