prototype SKILL.md skillA
prototype from emilkowalski/skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add emilkowalski/skills/prototype@git:20260915.85e8e23Pins git:20260915.85e8e23 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- emilkowalski/skills
- Path
skills/prototype/SKILL.md- Versions recorded
- 3
- Latest version
- git:20260915.85e8e23, committed Sep 15, 2026
- First version recorded
- Jul 27, 2026
- Size
- 7,830 bytes
- Repository stars
- 47,883
- License
- MIT
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.
…Read the whole file at its exact version.
How to install
mdr add emilkowalski/skills/prototype@sha256:bba39c955eb1871cThe line at the top of this page pins the label git:20260915.85e8e23, 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.
[](https://markdownregistry.com/a/art_raone2sszoird3jx)
6 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 3 versions of this file, between Jul 27, 2026 and Sep 15, 2026, about one every 25 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260915.85e8e23 latest | 2026-09-15 | 85e8e23 | 7,830 B | A | view · diff |
| git:20260915.0b85d4b | 2026-09-15 | 0b85d4b | 7,933 B | A | view · diff |
| git:20260727.70744e3 | 2026-07-27 | 70744e3 | 7,488 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (7830 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
emilkowalski/skills · 47,883 stars · license MIT · pushed 2026-10-11 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_raone2sszoird3jx GET https://markdownregistry.com/api/v1/resolve?ref=emilkowalski/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.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.
More from emilkowalski/skills
Every file in emilkowalski/skills