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prototype-planner

100 / 100 · Low risk

Fine to try.

By polar-bear-org/claude-skills (GitHub) · design · 54 stars · scanned at commit 95f0180

Plans the cheapest prototype that answers the question, part of the Design Thinking Pack by 90n. Use this whenever the user says "run prototype-planner", "plan the prototype", "what should we build to test this", "how do we test this cheaply", or an assumption needs testing and the team's instinct is to build the product to find out. Use it even for "we'll just build an MVP".

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/'prototype-planner' ] || [ -L ~/.agents/skills/'prototype-planner' ]; then echo 'A skill folder named prototype-planner already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/polar-bear-org/claude-skills' "$d" && git -C "$d" checkout --quiet '95f01806ca43f6ee788d0579743e35853b695930' -- 'packs/design-thinking-pack/skills/prototype-planner' && mkdir -p ~/.agents/skills && cp -R "$d"/'packs/design-thinking-pack/skills/prototype-planner' ~/.agents/skills/'prototype-planner' && 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/'prototype-planner' ~/.claude/skills/'prototype-planner' (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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