feat(design): skill health dashboard mockup (#518)

* feat(Design): skill health dashboard mockup

* fix(comments): code according to comments

commands/skill-health.md

@@ -0,0 +1,51 @@
+---
+name: skill-health
+description: Show skill portfolio health dashboard with charts and analytics
+command: true
+---
+
+# Skill Health Dashboard
+
+Shows a comprehensive health dashboard for all skills in the portfolio with success rate sparklines, failure pattern clustering, pending amendments, and version history.
+
+## Implementation
+
+Run the skill health CLI in dashboard mode:
+
+```bash
+node "${CLAUDE_PLUGIN_ROOT}/scripts/skills-health.js" --dashboard
+```
+
+For a specific panel only:
+
+```bash
+node "${CLAUDE_PLUGIN_ROOT}/scripts/skills-health.js" --dashboard --panel failures
+```
+
+For machine-readable output:
+
+```bash
+node "${CLAUDE_PLUGIN_ROOT}/scripts/skills-health.js" --dashboard --json
+```
+
+## Usage
+
+```
+/skill-health                    # Full dashboard view
+/skill-health --panel failures   # Only failure clustering panel
+/skill-health --json             # Machine-readable JSON output
+```
+
+## What to Do
+
+1. Run the skills-health.js script with --dashboard flag
+2. Display the output to the user
+3. If any skills are declining, highlight them and suggest running /evolve
+4. If there are pending amendments, suggest reviewing them
+
+## Panels
+
+- **Success Rate (30d)** — Sparkline charts showing daily success rates per skill
+- **Failure Patterns** — Clustered failure reasons with horizontal bar chart
+- **Pending Amendments** — Amendment proposals awaiting review
+- **Version History** — Timeline of version snapshots per skill