← All skills

principle-test-behavior-not-implementation

100 / 100 · Low risk

Fine to try.

By koolamusic/claudefiles (GitHub) · coding · 120 stars · scanned at commit c977fee

Apply when you write, change, or keep a test. Call the code as its users do and assert the exact result they see. Rewrite or delete a test that would pass if every imported function returned undefined.

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/'principle-test-behavior-not-implementation' ] || [ -L ~/.agents/skills/'principle-test-behavior-not-implementation' ]; then echo 'A skill folder named principle-test-behavior-not-implementation already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/koolamusic/claudefiles' "$d" && git -C "$d" checkout --quiet 'c977feefd4c9f04591f7ab26ff52babc65e85c08' -- 'plugins/pstack/skills/principle-test-behavior-not-implementation' && mkdir -p ~/.agents/skills && cp -R "$d"/'plugins/pstack/skills/principle-test-behavior-not-implementation' ~/.agents/skills/'principle-test-behavior-not-implementation' && 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/'principle-test-behavior-not-implementation' ~/.claude/skills/'principle-test-behavior-not-implementation' (other agents: ~/.cursor/skills, ~/.copilot/skills, ~/.gemini/skills, ~/.gemini/config/skills, ~/.config/opencode/skills). Or install through the finder skill, which does both.

Badge for your README

The badge for koolamusic/claudefiles shows the score of its lowest-scoring skill.

[![SkillTrust](https://zalavijaysinh.github.io/skilltrust/badges/koolamusic/claudefiles.svg)](https://zalavijaysinh.github.io/skilltrust/repos/koolamusic/claudefiles/)

Score history