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053-design-simple-rules

100 / 100 · Low risk

Fine to try.

By jabrena/plinth (GitHub) · design · 461 stars · scanned at commit bbdd3f8

Use when Java design, refactoring, or implementation tradeoffs should be evaluated with Kent Beck's simple design rules, including passes the tests, reveals intention, has no duplication, and has the fewest elements. This should trigger for requests such as Apply simple design rules; Review this design with Beck's rules; Choose between these refactoring options; Keep this Java design simple. Part of Plinth Toolkit

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/'053-design-simple-rules' ] || [ -L ~/.agents/skills/'053-design-simple-rules' ]; then echo 'A skill folder named 053-design-simple-rules already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/jabrena/plinth' "$d" && git -C "$d" checkout --quiet 'bbdd3f84aa085ab41151eb49d8da449762d32d83' -- 'skills/053-design-simple-rules' && mkdir -p ~/.agents/skills && cp -R "$d"/'skills/053-design-simple-rules' ~/.agents/skills/'053-design-simple-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/'053-design-simple-rules' ~/.claude/skills/'053-design-simple-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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