Ruler
Applies one set of rules to all your coding agents.
Updated
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Use cases
About Ruler
Ruler is listed in our coding category and is aimed at builders. Applies one set of rules to all your coding agents. Pricing, as the maker states it: Open source. Maturity: Active. We last checked the official link on 2026-10-16.
What is Ruler?
Ruler centralizes the instructions you give to AI coding assistants. Different agents, such as GitHub Copilot, Claude, Cursor and Aider, each need their own configuration files, which leads to duplicated effort and drift as a project evolves.
Ruler provides a single source of truth for those rules and applies it to all your coding agents, including context-specific instructions for different parts of a project.
Sources: the official README and our directory listing, checked 2026-10-18. Official site: github.com/intellectronica/ruler.
Who is Ruler for?
Teams using more than one coding assistant who want one set of rules instead of many config files.
Ruler at a glance
- Open source: Yes (MIT License)
- GitHub: intellectronica/ruler · 2,949 stars (as of Oct 21, 2026)
Key features
- One source of truth for agent instructions
- Applies rules to Copilot, Claude, Cursor, Aider and more
- Context-specific instructions per component
Ruler FAQ
What is Ruler?
Ruler centralizes the instructions you give to AI coding assistants. Different agents, such as GitHub Copilot, Claude, Cursor and Aider, each need their own configuration files, which leads to duplicated effort and drift as a project evolves.
Who is Ruler for?
Teams using more than one coding assistant who want one set of rules instead of many config files.
Is Ruler free?
Ruler's pricing, as the maker states it: Open source. Open-source tools are free to use, though you may still pay for model API usage or a hosted plan. Check the official site for current plans.
Is Ruler open source?
Yes. Ruler is released under the MIT License, according to its GitHub repository.
What are alternatives to Ruler?
Similar tools include OpenHands, Vibe Kanban, Coder, Maestro, Gentle AI and Imbue.
Ruler ratings and reviews
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Ruler alternatives
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OpenHands
Open-source platform for autonomous coding agents.
Vibe Kanban
Kanban board for planning and running tasks with Claude Code, Codex and other coding agents.
Coder
Self-hosted cloud development environments for developers and their coding agents.
Maestro
Command center for orchestrating multiple coding agents.
Gentle AI
Configures the coding agents you already use with shared rules, skills and settings.
Imbue
AI research company building tools for coding agents, including Sculptor for running parallel agents.
Related lists
🏆 Ranked in: Cursor alternatives
🔁 Listed in: Cursor alternatives
🧭 Task guides: Rules, skills and config tools for coding agents
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