Every AI coding tool — Cursor, Windsurf, Claude Code, Copilot — has its own config format. Skills, rules, agents, memory files: all scattered, duplicated, out of sync. Baton is a CLI package manager for AI tool configuration. One baton.yaml, 14 tools. Define profiles once, sync everywhere. Version-controlled, composable, team-shareable — like npm, but for your AI dev setup.