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-productivity/skills/sprint-summary/SKILL.md

@@ -0,0 +1,77 @@
+---
+description: >
+  Summarize a sprint's worth of Claude Code activity — sessions grouped by
+  project (cwd), per-model cost breakdown, token efficiency (cache hit rate,
+  compaction baselines), subagent effectiveness from workflow API, velocity
+  metrics (turn_count, turn_duration_ms), and tool diversity across the sprint.
+---
+
+# Sprint Summary
+
+Generate a sprint summary from Claude Code Agent Monitor data.
+
+## Input
+
+The user provides: **$ARGUMENTS**
+
+This may be:
+- A sprint duration: "last 2 weeks", "last 10 days"
+- A date range: "2025-03-31 to 2025-04-13"
+- "current sprint" (default: last 14 days)
+
+## Procedure
+
+1. **Fetch sprint data** from `http://localhost:4820`:
+   - `GET /api/sessions?limit=500` — all sessions in range (default sort: most recently updated first)
+   - `GET /api/analytics` — aggregated metrics
+   - `GET /api/pricing/cost` — total costs
+   - For high-value sessions: `GET /api/events?session_id={id}` — event details
+
+2. **Compile sprint summary**:
+
+   ### 🎯 Sprint Overview
+   - Sprint period: [start] to [end]
+   - Total sessions: N (completed: N, errored: N, abandoned: N)
+   - Total development hours with Claude Code: N
+   - Total cost: $X.XX
+   - Overall completion rate: N%
+
+   ### 📦 Deliverables
+   Group sessions by working directory (project):
+   - **Project A** (`/path/to/project`)
+     - N sessions, N hours, key activities
+   - **Project B** (`/path/to/other`)
+     - N sessions, N hours, key activities
+
+   ### 📊 Velocity Metrics
+   | Metric | Sprint | Previous Sprint | Trend |
+   |--------|--------|-----------------|-------|
+   | Sessions/day | N | N | ↑/↓ |
+   | Avg session duration | Nm | Nm | ↑/↓ |
+   | Cost/session | $N | $N | ↑/↓ |
+   | Tokens/session | N | N | ↑/↓ |
+   | Completion rate | N% | N% | ↑/↓ |
+
+   ### 🛠 Technology Breakdown
+   - Models used with distribution percentages
+   - Top 15 tools by usage with category grouping
+   - Subagent utilization rate
+
+   ### ⚡ Efficiency Analysis
+   - Token efficiency: cache hit rate, compaction frequency
+   - Cost per completed task
+   - Time-to-first-output (avg across sessions)
+   - Error recovery rate (sessions that recovered from errors)
+
+   ### 🔄 Retrospective Data Points
+   - **What went well**: Highest-efficiency sessions, best completion rates
+   - **What could improve**: Most expensive sessions, highest error rates
+   - **Action items**: Data-driven suggestions for next sprint
+
+## Output Format
+
+Professional sprint report suitable for sharing with team leads or managers:
+- Executive summary paragraph (5 sentences max)
+- Structured data tables with trend indicators
+- Grouped deliverables by project
+- Numbered action items at the end