A skill is a portable skill.md file — YAML frontmatter plus a markdown body — that you drop into Claude Code, Cursor, Windsurf, Copilot, or any other AI tool that reads project instructions. Every entry here downloads in the format you need, and carries a community-verified compatibility matrix showing which tools it actually works with.
Browse by category below, or contribute a skill you've built.
Long-Running Task Checkpointer
Wrap an agent loop so every step snapshots state to disk, letting a crashed agent resume from the last good state instead of restarting from scratch.
Tool-Call Budget Guard
Cap an agent's tool calls with per-tool budgets and graceful degradation when exhausted — so runaway agents don't blow through API quotas.
Self-Correcting Schema Agent
An agent that retries JSON generation with schema violation feedback until the output validates — or a budget is exhausted.
Browser Testing Agent Loop
Agentic loop that exercises a web app like a new user, files bug reports with screenshots + reproduction steps.