Composite bundles the best open-source agent skills into a catalog you can browse, evaluate, and apply in one click — instead of hunting through GitHub.
You'll need a coding agent (Claude Code, Cursor, or similar) and your own API key. Composite is the catalog — you bring the runtime.
We read every skill, test it against real agents, and only ship what improves output.
Every skill shows a last-synced timestamp. Upstream moves; we surface the drift.
Composite is a catalog and installer. You keep your Claude / Cursor / OpenAI keys.
Three steps. Nothing you don't already know.
Every skill card shows what it does, who wrote it, and when it last synced upstream.
Filter by agent (Claude Code, Cursor, Codex) and by focus (UI polish, taste, testing).
Composite writes the skill into your project's agent config. Reversible, versioned, diffable.
If you can run a coding agent and hold an API key, Composite works for you. If you've never touched a terminal, this isn't the tool — yet.