intellectronica/ruler: Universal Rules Sync for 25+ AI Coding Agents at 2.6K Stars

GitHub·medium signal

Ruler provides a single source of truth for AI agent instructions, automatically distributing rules to configuration files of 25+ supported agents including Claude Code, Cursor, Copilot, Codex, Goose, Gemini CLI, Aider, OpenHands, and more. Features include targeted agent configuration via ruler.toml, MCP Server propagation, .gitignore automation, skills distribution, and CI pipeline integration via 'ruler apply --no-gitignore'. Solves the proliferation problem of maintaining .cursor/rules, CLAUDE.md, GEMINI.md, .github/instructions separately.