prototype SKILL.md skillA

prototype from svyatov/supermatt is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned

mdr add svyatov/supermatt/prototype@git:20261017.6e83db0

Pins git:20261017.6e83db0 in mdr.lock. Pin the fingerprint instead.

Audit grade: A, 17 of 17 checks passed
Kind: SKILL.md skill
Repository: svyatov/supermatt
Path: skills/prototype/SKILL.md
Versions recorded: 5
Latest version: git:20261017.6e83db0, committed Oct 17, 2026
First version recorded: Sep 23, 2026
Size: 3,646 bytes
Repository stars: 14
License: MIT

Build a throwaway prototype to answer a design question. Use when the user wants to sanity-check whether a state model or logic feels right, or explore what a UI should look like.

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

# Prototype

A prototype is **throwaway code that answers a question**. The question decides the shape.

## Pick a branch

Identify which question is being answered from the user's prompt or surrounding code. If it remains ambiguous and the user is available, ask through the host's live multiple-choice capability, following its schema, or use chat when no such capability is usable:

- **"Does this logic / state model feel right?"** → [LOGIC.md](LOGIC.md). Build a single shareable HTML file (free-play buttons plus tabbed guided walkthroughs) that pushes the state machine through cases that are hard to reason about on paper, and that a non-developer can drive.
- **"What should this look like?"** → [UI.md](UI.md). Generate several radically different UI variations on a single route, switchable via a URL search param and a floating bottom bar.

The two branches produce very different artifacts, so getting this wrong wastes the whole prototype. If the question is genuinely ambiguous and the user isn't reachable, default to whichever branch better matches the surrounding code (a backend module → logic; a page or component → UI) and state the assumption at the top of the prototype.
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint

mdr add svyatov/supermatt/prototype@sha256:4e452304c3a7025e

The line at the top of this page pins the label git:20261017.6e83db0, 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.

Badge

[![mdr](https://markdownregistry.com/badge/art_mkazz4h5bm534qvz.svg)](https://markdownregistry.com/a/art_mkazz4h5bm534qvz)

0 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 5 versions of this file, between Sep 23, 2026 and Oct 17, 2026, about one every 6 days.

version	committed	commit	size	audit
git:20261017.6e83db0 latest	2026-10-17	6e83db0	3,646 B	A	view · diff
git:20261011.62c7072	2026-10-11	62c7072	3,659 B	A	view · diff
git:20260927.e7f7118	2026-09-27	e7f7118	3,423 B	A	view · diff
git:20260923.d4eb9cf	2026-09-23	d4eb9cf	3,357 B	A	view · diff
git:20260923.0e85035	2026-09-23	0e85035	3,278 B	A	view

Audit of the latest version

A 17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.

pass: Frontmatter block present
pass: Frontmatter declares a name
pass: Frontmatter declares a description
pass: Size between 200 bytes and 200 KB (3646 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

GitHub

svyatov/supermatt · 14 stars · license MIT · pushed 2026-10-22 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_mkazz4h5bm534qvz
GET https://markdownregistry.com/api/v1/resolve?ref=svyatov/supermatt/prototype
GET https://markdownregistry.com/api/v1/blob/4e452304c3a7025e2a622da536f813e6957e9794bb1fc041da10bd8275281bd0

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 svyatov/supermatt

AGENTS.md AGENTS.md file

svyatov/supermatt · AGENTS.md

git:20261018.d55c198 · audit A · 14 stars

ask-supermatt SKILL.md skill

svyatov/supermatt · skills/ask-supermatt/SKILL.md · Ask which skill or flow fits your situation. A router over the skills in this repo.

git:20261018.d55c198 · audit A · 14 stars

babysit-pr SKILL.md skill

svyatov/supermatt · skills/babysit-pr/SKILL.md · Watch a pull request until it is ready to merge: open it when the branch has none, handle review feedback before CI…

git:20261018.8202597 · audit A · 14 stars

code-review SKILL.md skill

svyatov/supermatt · skills/code-review/SKILL.md · Review the changes since a fixed point (commit, branch, tag, or merge-base) along three axes: Standards (does the code…