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 10
• npx @crafter/skillkit stats --days N – Change time range (default: 30)
• npx @crafter/skillkit stats --all --days 90 – Full list over 90 days
• npx @crafter/skillkit list – List installed skills with size and context budget
• npx @crafter/skillkit health – Health check: unused skills, context budget, DB status
• npx @crafter/skillkit prune – List unused skills. Add --yes to confirm deletion
• npx @crafter/skillkit scan – Force re-scan (runs automatically, rarely needed)
• npx @crafter/skillkit scan --include-commands – Also track slash commands
• Any command with --claude or --opencode to 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

1. First time? Run npx @crafter/skillkit stats – it auto-discovers and indexes everything
2. Full picture? Run npx @crafter/skillkit stats --all --days 90
3. Want cleanup? Run npx @crafter/skillkit health then npx @crafter/skillkit prune --yes
4. Quick overview? Run npx @crafter/skillkit list for installed skills with sizes
5. Filter by agent? Add --claude or --opencode to 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.