I had four AI coding assistants and the same config in five places. Here's what I built.

A while back my repo looked like this: CLAUDE.md # rules for Claude Code .claude/agents/code-reviewer.md # agent definitions .claude/skills/refactor/SKILL.md # skill packs .claude/commands/deploy.md # slash commands .claude.json # MCP servers .cursor/rules/typescript.mdc # rules for Cursor .cursor/mcp.json # MCP servers (different schema) .github/copilot-instructions.md # rules for Copilot .github/agents/code-reviewer.md # agents (different format) .continue/rules/typescript.md # rules for Conti