ruler

Ruler is a TypeScript MCP server and CLI tool that solves a specific multi-agent coordination problem: developers maintaining separate instruction files for each AI coding assistant end up with duplicated, inconsistent configurations across their projects. Ruler introduces a single `.ruler/` directory of Markdown files as the authoritative source, then automatically generates the correct configuration files for each supported agent, including `CLAUDE.md` and `.mcp.json` for Claude Code, `.cursor/mcp.json` for Cursor, `.github/copilot-instructions.md` for GitHub Copilot, `.aider.conf.yml` for Aider, and equivalents for over a dozen other tools. It also propagates MCP server settings across agents that support them and handles nested `.ruler/` directories for monorepos or projects with distinct components. A `ruler.toml` file lets teams specify which agents to target and customize output paths. The `.gitignore` automation keeps generated files out of version control. Teams using multiple AI coding tools simultaneously will find the most value, particularly when onboarding new agents without rewriting existing guidance.

What people ask about ruler