Skillselion is a ranked directory of skills, MCP servers and marketplaces for Claude Code, Codex, Cursor and other coding agents. Every entry is a real SKILL.md with its bundled scripts and references, ordered by actual install count rather than submission date. The catalog re-crawls itself daily, so dead repos and stale listings drop out automatically. There's also an MCP server, so an agent can search and load a skill mid-task without installing anything.