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principles

95 / 100 · Low risk

Fine to try.

By melodic-software/claude-code-plugins (GitHub) · coding · 30 stars · scanned at commit 677e798

Answers test design questions from authoritative TDD sources (Beck, Khorikov), producing WHY reasoning to improve test design decisions. Use when: 'should I mock this', 'four pillars of a good test', 'red green refactor', 'classical vs london school', 'test doubles', 'testing anti-patterns', 'resistance to refactoring', 'code coverage', 'observable behavior', 'humble object', 'integration test', 'test pyramid', 'output vs state vs communication test', 'property-based testing', 'characterization…

Works with any agent that supports SKILL.md skills.

What this skill can do

Other copies in this repository

melodic-software/claude-code-plugins has 2 more folders with a skill named principles. This page shows the lowest-scoring copy.

• plugins/code-metrics/skills/principles 100/100 · Low risk
• plugins/mutation-testing/skills/principles 100/100 · Low risk

Install

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

if [ -e ~/.agents/skills/'principles' ] || [ -L ~/.agents/skills/'principles' ]; then echo 'A skill folder named principles already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/melodic-software/claude-code-plugins' "$d" && git -C "$d" checkout --quiet '677e7988f432dacb5e2d4df2b124f96da8e8f9f3' -- 'plugins/tdd/skills/principles' && mkdir -p ~/.agents/skills && cp -R "$d"/'plugins/tdd/skills/principles' ~/.agents/skills/'principles' && 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/'principles' ~/.claude/skills/'principles' (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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