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sandi-metz-rules

100 / 100 · Low risk

Fine to try.

By Dicklesworthstone/pi_agent_rust (GitHub) · coding · 1,992 stars · scanned at commit 07fc1e0

This skill should be used when users request code review, refactoring, or code quality improvements for Ruby codebases. Apply Sandi Metz's four rules for writing maintainable object-oriented code - classes under 100 lines, methods under 5 lines, no more than 4 parameters, and controllers instantiate only one object. Use when users mention "Sandi Metz", "code quality", "refactoring", or when reviewing Ruby code for maintainability.

Works with any agent that supports SKILL.md skills.

What this skill can do

We found nothing in the files we read that matches our rules. That does not prove the skill is safe: see the limits of static scanning.

Install

Paste this into your terminal. It downloads exactly the version we scanned, not whatever is newest.

if [ -e ~/.agents/skills/'sandi-metz-rules' ] || [ -L ~/.agents/skills/'sandi-metz-rules' ]; then echo 'A skill folder named sandi-metz-rules already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/Dicklesworthstone/pi_agent_rust' "$d" && git -C "$d" checkout --quiet '07fc1e0b82ab6a16e694a0e00a36767e9f23cf1b' -- 'tests/ext_conformance/artifacts/agents-mikeastock/skills/sandi-metz-rules' && mkdir -p ~/.agents/skills && cp -R "$d"/'tests/ext_conformance/artifacts/agents-mikeastock/skills/sandi-metz-rules' ~/.agents/skills/'sandi-metz-rules' && rm -rf "$d"; fi

Codex reads ~/.agents/skills directly. For Claude Code, Cursor, Copilot, Gemini CLI, Antigravity or OpenCode, also link it. For Claude Code: ln -s ~/.agents/skills/'sandi-metz-rules' ~/.claude/skills/'sandi-metz-rules' (other agents: ~/.cursor/skills, ~/.copilot/skills, ~/.gemini/skills, ~/.gemini/config/skills, ~/.config/opencode/skills). Or install through the finder skill, which does both.

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