Is Ruler — One Source of Truth for Agent Rules free to use?

Yes. Ruler — One Source of Truth for Agent Rules is freely available on TokRepo. Check the Source & Thanks section on the asset page for the specific open-source license.

How do I install Ruler — One Source of Truth for Agent Rules?

Visit the asset page on TokRepo and click "Copy for agent" to get the installation instructions. Most assets can be installed with a single command.

PromptsMay 11, 2026·2 min read

Ruler — One Source of Truth for Agent Rules

Name: Ruler — One Source of Truth for Agent Rules
Author: Prompt Lab

Ruler centralizes agent instructions in a .ruler/ directory and generates CLAUDE.md, AGENTS.md, Cursor rules, and MCP configs from one config.

Prompt Lab · Community

Agent ready

This asset can be read and installed directly by agents

TokRepo exposes a universal CLI command, install contract, metadata JSON, adapter-aware plan, and raw content links so agents can judge fit, risk, and next actions.

Stage only · 29/100Stage only

Agent surface

Any MCP/CLI agent

Kind

CLI Tool

Install

Single

Trust

Trust: Community

Entrypoint

README.md

Universal CLI install command

npx tokrepo install 4f2539b3-dd26-40a0-ade4-9c300f752a20

install contract metadata JSON adapter plan raw content

Intro

Best for: teams using multiple coding agents who want consistent instructions and MCP config propagation across tools

Works with: Node.js + npm/npx, a repo with agent config files (CLAUDE.md/AGENTS.md/.cursor), optional nested project structures

Setup time: 10 minutes

Quant Data

Supports Claude Code, Cursor, Codex, Copilot and more (repo)
Setup time ~10 minutes

How to Use It Well

Start with a short .ruler/AGENTS.md that encodes your real workflow (tests, style, safety). Then turn on nested mode only where components truly differ.

Adoption Checklist

Start with one real task and keep the scope narrow
Capture a baseline: time-to-first-success and output quality
Version your config/skills so teammates stay in sync

Guardrails

Generated files should stay generated. Avoid manual edits downstream; treat .ruler/ as the only editable surface.

FAQ

Q: Is it production-ready? A: The README labels it as a beta research preview; adopt it in one repo first and keep rollbacks simple.

Q: How does it avoid drift? A: Rules live in .ruler/ and Ruler regenerates downstream config files, so you maintain one source of truth.

Q: Can it handle monorepos? A: Yes. The repo documents nested rule loading for multiple .ruler/ directories with scoped configs.

🙏

Source & Thanks

GitHub: https://github.com/intellectronica/ruler Owner avatar: https://avatars.githubusercontent.com/u/46264?v=4 License (SPDX): MIT GitHub stars (verified via api.github.com/repos/intellectronica/ruler): 2,688

Discussion

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