prototype is agent-read markdown (skill) from firzus/agent-skills: Resolve a bounded design or feasibility question through an observable experiment. Use for authorized interface, logic, or technical exploration, including prepared Prototype issues; not settled implementation or source-only research..
Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.
What the file says
# Prototype a decision
Build the smallest experiment that answers the question, in a representative
environment. A prototype produces evidence for a decision, not a production feature.
## 1. Resume and bound the experiment
1. Read the request, project instructions, and existing issue or interview record,
including accepted choices, prerequisites, and evidence. Reuse settled framing.
2. Follow project conventions to consult relevant domain definitions, pending accepted
changes, and system contracts. Resolve consequential conflicts; distinguish
experimental assumptions from accepted meanings and implemented behavior.
Missing conventions call for targeted clarification, not automatic project setup.
3. Establish question, scope/exclusions, scenarios, constraints, decision owner,
stopping evidence, and where the interview resumes. Distinguish a measured fact
from a preference requiring the owner's judgment.
4. Verify execution authorization, access, and representative inputs. A prepared
brief or a ready label alone does not authorize building or external writes.
| Request | Action |
| --- | --- |
…
Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.
A 17 of 17 checks passed. Deterministic, no model, 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 (5664 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
firzus/agent-skills · 3 stars · license MIT · pushed 2026-09-23 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_4feizxh6xljwxgvu
GET https://markdownregistry.com/api/v1/resolve?ref=firzus/agent-skills/prototype
GET https://markdownregistry.com/api/v1/blob/ff746b5502f05eb82db0400fff59374d3acf971f8c7e8a23694cf60aeb024288
Your agent 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.
firzus/agent-skills · skills/engineering/code-review/SKILL.md · Review a scoped diff against requirements, project standards, and correctness using independent read-only reviewers…
firzus/agent-skills · skills/engineering/deep-research/SKILL.md · Investigate a question across sources with delegated research, adversarial verification, and a reusable evidence…
firzus/agent-skills · skills/engineering/gamification/SKILL.md · Gamification design for products, apps, and game meta-layers: design an engagement, habit, or retention system; choose…
firzus/agent-skills · skills/engineering/implement/SKILL.md · Deliver prepared work with test-first verification, current documentation, and a verified handoff.
firzus/agent-skills · skills/engineering/interview/SKILL.md · Prepare approved Linear work briefs through a continuous interview, with progressive framing for large goals.
firzus/agent-skills · skills/engineering/security-review/SKILL.md · Perform source-only security audits of codebases, APIs, services, and applications. Use for security questions, focused…
firzus/agent-skills · skills/engineering/setup-codex/SKILL.md · Configure a reviewed Codex Operating Policy through model_instructions_file and offer low model verbosity with separate…
emilkowalski/skills · skills/prototype/SKILL.md · Build multiple genuinely different versions of a UI piece you describe, rendered behind a visual picker so you can flip…
plugin87/ux-ui-agent-skills · .claude/skills/prototype/SKILL.md · Move an idea up the fidelity ladder (content-first → wireframe → low-fi → high-fi → code) with a validation plan at…
mxyhi/ok-skills · prototype/SKILL.md · Build a throwaway prototype to answer a design question. Use when the user wants to sanity-check whether a state model…
tobihagemann/turbo · claude/skills/prototype/SKILL.md · Build a self-contained local prototype at .turbo/prototypes/<slug>.html, drive it, and hand it to the user to settle…
tobihagemann/turbo · codex/skills/prototype/SKILL.md · Build a self-contained local prototype at .turbo/prototypes/<slug>.html, drive it, and hand it to the user to settle…
swingerman/engineer · engineer/skills/prototype/SKILL.md · Use to rough out a working thing fast, zero ceremony, before committing to the pipeline — the prototype IS the spec…
outlinedriven/odin-claude-plugin · plugins/odin-design/skills/prototype/SKILL.md · Use when asked to prototype one design question through a cheap logic or UI experiment, including button-driven…
vodailocz/kilo-kit-mcp · skills/engineering/prototype/SKILL.md · Build a throwaway prototype to answer a design question. Use when the user wants to sanity-check whether a state model…
