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litmus-test

80 / 100 · Low risk

Fine to try. Some of what it can do is expected: a coding skill usually runs build and test commands.

By Everyone-Needs-A-Copilot/claude-copilot (GitHub) · coding · 14 stars · scanned at commit 0f57aa5

Creative direction Litmus Test for evaluating ideas, concepts, and messaging against a rigorous differentiation standard — cuts through generic thinking to identify whether a concept is safe/forgettable or genuinely distinct. Applies the CCO creative brief, concept scoring rubric, and challenge-the-brief protocol. Use proactively when evaluating campaign concepts, reviewing brand messaging for differentiation, testing creative directions, preparing concept presentations, or challenging a brief …

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/'litmus-test' ] || [ -L ~/.agents/skills/'litmus-test' ]; then echo 'A skill folder named litmus-test already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/Everyone-Needs-A-Copilot/claude-copilot' "$d" && git -C "$d" checkout --quiet '0f57aa588a5c2c7da021b976edc1b176ea602022' -- '.claude/skills/copywriting/litmus-test' && mkdir -p ~/.agents/skills && cp -R "$d"/'.claude/skills/copywriting/litmus-test' ~/.agents/skills/'litmus-test' && 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/'litmus-test' ~/.claude/skills/'litmus-test' (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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