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principle-test-behavior-not-implementation

80 / 100 · Low risk

Fine to try.

By chmonitor/chmonitor (GitHub) · data · 304 stars · scanned at commit 0414013

Apply when you write, change, or keep a test. Identify a relevant defect and check that the test detects it. Assert the required result or observable effect, including absence when the contract requires it.

Works with any agent that supports SKILL.md skills.

What this skill can do

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=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/chmonitor/chmonitor' "$d" && git -C "$d" checkout --quiet '04140135acfbd2adb525c7173459b584f9f3bb86' -- '.claude/skills/pstack/upstream/skills/principle-test-behavior-not-implementation' && mkdir -p ~/.agents/skills && cp -R "$d"/'.claude/skills/pstack/upstream/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.

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