SkillKit
Analytics for AI agent skills. Tracks usage, measures context budget, and prunes what you don't use.
Commands
SkillKit is an npm CLI. Run commands with npx @crafter/skillkit <command> or install globally first (npm i -g @crafter/skillkit).
npx @crafter/skillkit stats- Usage analytics with sparklines (auto-scans on first run)npx @crafter/skillkit stats --all- Show all skills, not just top 10npx @crafter/skillkit stats --days N- Change time range (default: 30)npx @crafter/skillkit stats --all --days 90- Full list over 90 daysnpx @crafter/skillkit list- List installed skills with size and context budgetnpx @crafter/skillkit health- Health check: unused skills, context budget, DB statusnpx @crafter/skillkit prune- List unused skills. Add--yesto confirm deletionnpx @crafter/skillkit scan- Force re-scan (runs automatically, rarely needed)npx @crafter/skillkit scan --include-commands- Also track slash commands- Any command with
--claudeor--opencodeto filter by agent
When to Use
- User asks "which skills do I use the most?"
- User asks "are there unused skills?" or "clean up my skills"
- User wants to see skill analytics, usage trends, or context budget
- User wants to optimize their skill setup
- User asks about context window usage from skills
- User asks "show me all my skill usage" or "full stats"
Decision Guide
- First time? Run
npx @crafter/skillkit stats- it auto-discovers and indexes everything - Full picture? Run
npx @crafter/skillkit stats --all --days 90 - Want cleanup? Run
npx @crafter/skillkit healththennpx @crafter/skillkit prune --yes - Quick overview? Run
npx @crafter/skillkit listfor installed skills with sizes - Filter by agent? Add
--claudeor--opencodeto any command
How It Works
Discovers skills for Claude Code and OpenCode. Scans skill directories and project-local .claude/skills/ for installed skills. Indexes Claude Code JSONL sessions and OpenCode SQLite sessions. Extracts Skill tool_use blocks from assistant messages and <command-name> tags from user messages. Auto-deduplicates on every scan. All data stored locally in ~/.skillkit/analytics.db.