Is the Create Rule skill free?

Yes. The skill itself is free from coco-research/coco. SkillProof publishes the install command and an independent test verdict at no cost.

What is the Create Rule SkillProof Score?

7.6/10 — installs cleanly 5/5, triggers reliably 5/5, output vs. baseline 7/10, docs & honesty 2/5.

How do I install Create Rule?

Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.

Can I use Create Rule with Cursor, Copilot, Gemini CLI, Codex or other AI tools?

The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.

Create Rule

Scaffolds Cursor .mdc rule files in .cursor/rules/ with correct frontmatter and scope.

by coco-research · coco-research/coco

Tested · Works

Install — copy the command Download source ↗

Test report

Verdict: Tested · Works
Score: 7.6/10
Tested: Jul 16, 2026
Environment: Claude Code 2.x (agent harness)
Upstream re-checked: Aug 10, 2026 · 9a7d391

Ran a real baseline-vs-skill comparison for a Zod-validation rule request: unguided output defaulted to a legacy freeform `.cursorrules`-style file, the skill correctly produced a proper `.cursor/rules/zod-api-validation.mdc` with frontmatter. But the doc itself contradicts its own line-count guidance ('Under 50 lines' vs the checklist's 'under 500 lines') and the trigger description advertises RULE.md/AGENTS.md support the body never actually covers.

Scored on four weighted criteria — install, triggering, output vs. baseline, docs. How scoring works

Installs cleanly 5/5
Triggers reliably 5/5
Output vs. baseline 7/10
Docs & honesty 2/5

What Create Rule does

A Cursor-IDE adapter skill that turns a plain-language request for a coding standard or convention into a properly formatted `.cursor/rules/*.mdc` file (description/globs/alwaysApply frontmatter), asking for scope and file-pattern only when the conversation hasn't already supplied them. Self-contained, single file, no external dependencies.

How to install Create Rule

git clone https://github.com/coco-research/coco.git
cd coco
mkdir -p ~/.claude/skills
cp -r adapters/cursor/skills/create-rule ~/.claude/skills/create-rule

Skills live in ~/.claude/skills/ (global) or .claude/skills/ (per-project). Restart Claude Code after installing.

Commands — how to trigger Create Rule

/create-rule Scaffolds Cursor .mdc rule files in .cursor/rules/ with correct frontmatter and scope.

It also activates on plain-language prompts like these:

Turn our Zod validation convention into a proper Cursor rule file
Scaffold a new .cursor/rules file for our API error-handling standard
I want a Cursor rule that always applies to files in src/components

Frequently asked questions

Is the Create Rule skill free?: Yes. The skill itself is free from coco-research/coco. SkillProof publishes the install command and an independent test verdict at no cost.
Does Create Rule work with Claude Code?: We tested it with Claude Code 2.x (agent harness) on Jul 16, 2026. Verdict: Tested · Works. Ran a real baseline-vs-skill comparison for a Zod-validation rule request: unguided output defaulted to a legacy freeform `.cursorrules`-style file, the skill correctly produced a proper `.cursor/rules/zod-api-validation.mdc` with frontmatter. But the doc itself contradicts its own line-count guidance ('Under 50 lines' vs the checklist's 'under 500 lines') and the trigger description advertises RULE.md/AGENTS.md support the body never actually covers.
What is the Create Rule SkillProof Score?: 7.6/10 — installs cleanly 5/5, triggers reliably 5/5, output vs. baseline 7/10, docs & honesty 2/5.
How do I install Create Rule?: Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.
Can I use Create Rule with Cursor, Copilot, Gemini CLI, Codex or other AI tools?: The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.