prototype SKILL.md skillA
prototype from swingerman/engineer is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add swingerman/engineer/prototype@git:20260826.e7447cdPins git:20260826.e7447cd in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- swingerman/engineer
- Path
engineer/skills/prototype/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260826.e7447cd, committed Aug 26, 2026
- First version recorded
- Aug 23, 2026
- Size
- 6,164 bytes
- Repository stars
- 162
- License
- MIT
Use to rough out a working thing fast, zero ceremony, before committing to the pipeline — the prototype IS the spec. Triggers — "/engineer.prototype", "prototype this", "quick prototype", "spike it", "rough it out", "throwaway version", "let's prototype".
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
The **prototype-first path** to a feature (see
`${CLAUDE_PLUGIN_ROOT}/references/two-paths.md`). Build a **rough working thing
fast** and **iterate it** — no feature list, no stories, just the concept and
rounds — until it converges. No ACs, no plan, no tests, no gates, no gauntlet:
there is nothing to grade against yet, because **the prototype is what
everything else will be graded against.** Most prototypes are learning; the ones
worth keeping **convert to spec** — reaching the *same* fully-specced, hardened
feature as spec-first, by build-then-spec instead of spec-then-build.
The **iteration loop is the point** — it is where the speed comes from. Expect
several rounds; the "one thing it must demonstrate" sharpens as you go.
Sits *before* `discuss`/`feature-init` in ceremony: `discuss` talks an idea
through; `prototype` builds it to find out. `discuss` and `feature-init` offer
this path as a first-class entry.
## When to use
- `/engineer.prototype "<idea>"` — spike an idea into a runnable rough cut.
- The core question is "what would this even look like / feel like / do?" and a
paragraph of spec won't answer it but ten minutes of code will.
…Read the whole file at its exact version.
How to install
mdr add swingerman/engineer/prototype@sha256:9d2eea61e1ec756fThe line at the top of this page pins the label git:20260826.e7447cd, 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_hja57qdbwaeg3g5e)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between Aug 23, 2026 and Aug 26, 2026, about one every 3 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260826.e7447cd latest | 2026-08-26 | e7447cd | 6,164 B | A | view · diff |
| git:20260823.7f6ca14 | 2026-08-23 | 7f6ca14 | 4,834 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 (6164 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
swingerman/engineer · 162 stars · license MIT · pushed 2026-10-27 · branch master
API
GET https://markdownregistry.com/api/v1/artifacts/art_hja57qdbwaeg3g5e GET https://markdownregistry.com/api/v1/resolve?ref=swingerman/engineer/prototype GET https://markdownregistry.com/api/v1/blob/9d2eea61e1ec756f7ac8048fd351fb1da5418d876615f287a3dff75e3e428e97
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 swingerman/engineer
Every file in swingerman/engineer