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build-prototype-spec

100 / 100 · Low risk

Fine to try.

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

Writes the spec for one prototype, answer first, with problem and evidence, non-goals, numbered requirements that each carry one behaviour and a Given-When-Then check, open questions with an owner and a date, and a dated export kept as the record. Use for "run build-prototype-spec", "write the spec for my prototype", "put what we agreed in writing", "number the requirements", "write a pass or fail check for each requirement", "list the non-goals", "turn my flow into requirements", part of the C…

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/'build-prototype-spec' ] || [ -L ~/.agents/skills/'build-prototype-spec' ]; then echo 'A skill folder named build-prototype-spec 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 "$d" checkout --quiet '95f01806ca43f6ee788d0579743e35853b695930' -- 'packs/product-builders-pack/skills/build-prototype-spec' && mkdir -p ~/.agents/skills && cp -R "$d"/'packs/product-builders-pack/skills/build-prototype-spec' ~/.agents/skills/'build-prototype-spec' && 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/'build-prototype-spec' ~/.claude/skills/'build-prototype-spec' (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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