prototype-fast SKILL.md skillA
prototype-fast from gamedev-skills/awesome-gamedev-agent-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add gamedev-skills/awesome-gamedev-agent-skills/prototype-fast@git:20260808.3727d02Pins git:20260808.3727d02 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- gamedev-skills/awesome-gamedev-agent-skills
- Path
skills/workflows/prototype-fast/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260808.3727d02, committed Aug 8, 2026
- First version recorded
- Jun 24, 2026
- Size
- 6,024 bytes
- Repository stars
- 1,784
- License
- Apache-2.0
Build a playable prototype in about an hour to answer one question — is it fun? — with greybox primitives, a hard timebox, and explicit keep/kill criteria. Use when prototyping a mechanic, making a vertical slice or MVP, greyboxing/blockout, or judging throwaway vs keep.
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 Fast Get a mechanic into a player's hands fast to learn whether it's worth building. The output of a prototype is a **decision** (keep / kill / refactor), not a product. Optimize for learning speed, and decide up front whether the code is throwaway or load-bearing. ## When to use - Use when validating a single mechanic or "what if", building a vertical slice / MVP, greyboxing a level or interaction, or de-risking an idea before committing real time. - Use when the user says "just get something playable", "is this fun?", or "rough it in". **When *not* to use:** a timed competition with a deadline and a submission (use `game-jam`); shipping or updating a real release (use `steam-publish` / `itch-publish`); building the production version of a validated feature (use the engine/genre skill directly). ## Core workflow 1. **Write the one question.** State the single thing the prototype must answer, e.g. *"Is grappling-while-falling satisfying to control?"* If you have two questions, build two prototypes. A prototype that tests everything tests nothing. 2. **Decide throwaway vs keep — before you write code.** Throwaway (a *spike*): hard-code, …
Read the whole file at its exact version.
How to install
mdr add gamedev-skills/awesome-gamedev-agent-skills/prototype-fast@sha256:02491395c621833dThe line at the top of this page pins the label git:20260808.3727d02, 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_cm3qqnobh4wljs57)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between Jun 24, 2026 and Aug 8, 2026, about one every 45 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260808.3727d02 latest | 2026-08-08 | 3727d02 | 6,024 B | A | view · diff |
| git:20260624.cc7ca2d | 2026-06-24 | cc7ca2d | 6,197 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 (6024 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
gamedev-skills/awesome-gamedev-agent-skills · 1,784 stars · license Apache-2.0 · pushed 2026-10-09 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_cm3qqnobh4wljs57 GET https://markdownregistry.com/api/v1/resolve?ref=gamedev-skills/awesome-gamedev-agent-skills/prototype-fast GET https://markdownregistry.com/api/v1/blob/02491395c621833d2252f7a33a96aa11f26eb48523fea167c68272fb3c785ba1
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.