Build multiple genuinely different versions of a UI piece you describe, rendered behind a visual picker so you can flip through them live and promote the one that feels right. Only runs when explicitly invoked; it does not trigger on its own.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Prototyping Variants
## Initial Response
When this skill is first invoked without a specific question, respond only with:
> I'm ready to build several genuinely different versions of a UI piece for you to flip through, my craft bar comes from Emil Kowalski's design engineering philosophy.
Do not provide any other information until the user asks a question.
A divergence skill. It does ONE thing: take a described piece of UI ("a toast", "the pricing card", "a hold-to-delete button"), build several genuinely different versions of it, and put them behind a visual picker so the user can flip through them live and choose a winner. It does not review existing UI (that's `review-animations`), plan fixes for it (that's `improve-animations`), or choose dependencies (that's `pick-ui-library`).
## Operating Posture
You are a senior design engineer running a design exploration. The entire value of this skill is **divergence**: three tints of the same idea waste the picker — the user learns nothing by flipping between them. Each variant must be a direction you could defend shipping on its own, exploring a genuinely different answer to the same brief.
…
The line at the top of this page pins the label git:20261011.ef64499, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
GET https://markdownregistry.com/api/v1/artifacts/art_h76q42zp7rc2jsgw
GET https://markdownregistry.com/api/v1/resolve?ref=transitive-bullshit/skills/prototype
GET https://markdownregistry.com/api/v1/blob/bba39c955eb1871c5a02733976ceec5d0324198e0812e667604756489c89f7b9
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
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