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Agent skill

Prototype

by fossasia in fossasia/eventyay-interpretation

Build a throwaway prototype to flesh out a design — a runnable terminal app for state/business-logic questions, or several radically different UI variations toggleable from one route.

Apache-2.0Auto-check passedDevelopment

Install Prototype

skills CLI
$ npx skills add fossasia/eventyay-interpretation --skill prototype -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install fossasia/eventyay-interpretation prototype --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/fossasia/eventyay-interpretation.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/prototype .claude/skills/prototype && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
prototype
GitHub stars
1.6k
Used in
34 other repos
Token cost
~755 tokens
SKILL.md length
450 words
Files
3
Skills in repo
41
Repo updated
First seen
Licence
Apache-2.0

At a glance

Build a throwaway prototype to flesh out a design — a runnable terminal app for state/business-logic questions, or several radically different UI variations toggleable from one route.

  • Works in 6 steps: Throwaway from day one, and clearly… → One command to run. Whatever the… → No persistence by default. State lives… → …
  • Tasks that involve Prototyping
  • SKILL.md covers Pick a branch, Rules that apply to both and When done
  • Calls pnpm, python and bun

What it does

Prototype is an agent skill from fossasia/eventyay-interpretation. Build a throwaway prototype to flesh out a design — a runnable terminal app for state/business-logic questions, or several radically different UI variations toggleable from one route.

Its SKILL.md is about 760 tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files (for example `LOGIC.md` and `UI.md`).

It sits in Development, covering Prototyping. The repository describes itself as: A plugin for live interpretation of video streams. The licence is Apache-2.0.

When your agent uses it

  • Tasks that involve Prototyping

Example prompts

  • “/prototype”

Requirements

  • Python 3

Workflow steps

6 steps, taken from the first numbered list in SKILL.md.

  1. Throwaway from day one, and clearly marked as such. Locate the prototype code close to where it will actually be used (next to the module…
  2. One command to run. Whatever the project's existing task runner supports — pnpm , python , bun , etc. The user must be able to start it…
  3. No persistence by default. State lives in memory. Persistence is the thing the prototype is checking, not something it should depend on…
  4. Skip the polish. No tests, no error handling beyond what makes the prototype runnable, no abstractions. The point is to learn something…
  5. Surface the state. After every action (logic) or on every variant switch (UI), print or render the full relevant state so the user can see…
  6. Delete or absorb when done. When the prototype has answered its question, either delete it or fold the validated decision into the real…

What it can do on your machine

Read from SKILL.md and the folder at commit 1ca0139. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    Shell commands in SKILL.md call:

    • pnpm
    • python
    • bun

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md. Its commands use pnpm, which can reach the network depending on how they are called.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Prototype loads about 755 tokens when it runs. Until then it costs about 48 tokens; SKILL.md has 450 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~48
When it runs · the whole SKILL.md, loaded when a task matches
~755

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from fossasia/eventyay-interpretation at commit 1ca0139, republished under its Apache-2.0 licence (© fossasia). 450 words, ~755 tokens.

Download SKILL.mdSave it as .claude/skills/prototype/SKILL.md (or your agent's skills folder). This skill also uses 2 other files; get the full folder from GitHub.
name
prototype
description
Build a throwaway prototype to flesh out a design — a runnable terminal app for state/business-logic questions, or several radically different UI variations toggleable from one route.
disable-model-invocation
true

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, the surrounding code, or by asking if the user is around:

  • "Does this logic / state model feel right?" → LOGIC.md. Build a tiny interactive terminal app that pushes the state machine through cases that are hard to reason about on paper.
  • "What should this look like?" → 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 — 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.

Rules that apply to both

  1. Throwaway from day one, and clearly marked as such. Locate the prototype code close to where it will actually be used (next to the module or page it's prototyping for) so context is obvious — but name it so a casual reader can see it's a prototype, not production. For throwaway UI routes, obey whatever routing convention the project already uses; don't invent a new top-level structure.
  2. One command to run. Whatever the project's existing task runner supports — pnpm <name>, python <path>, bun <path>, etc. The user must be able to start it without thinking.
  3. No persistence by default. State lives in memory. Persistence is the thing the prototype is checking, not something it should depend on. If the question explicitly involves a database, hit a scratch DB or a local file with a clear "PROTOTYPE — wipe me" name.
  4. Skip the polish. No tests, no error handling beyond what makes the prototype runnable, no abstractions. The point is to learn something fast and then delete it.
  5. Surface the state. After every action (logic) or on every variant switch (UI), print or render the full relevant state so the user can see what changed.
  6. Delete or absorb when done. When the prototype has answered its question, either delete it or fold the validated decision into the real code — don't leave it rotting in the repo.
Show full SKILL.md (68 more words)Show less

When done

The answer is the only thing worth keeping from a prototype. Capture it somewhere durable (commit message, ADR, issue, or a NOTES.md next to the prototype) along with the question it was answering. If the user is around, that capture is a quick conversation; if not, leave the placeholder so they (or you, on the next pass) can fill in the verdict before deleting the prototype.

© fossasia, Apache-2.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 2 other files in .agents/skills/prototype of fossasia/eventyay-interpretation.

  • SKILL.md
  • LOGIC.md
  • UI.md

Open the folder on GitHubat commit 1ca0139

Used in 35 other repositories

We found 45 copies of this SKILL.md (exact, near-identical or edited) in other folders, from 34 other GitHub owners. This page covers the copy in fossasia/eventyay-interpretation, which our catalogue first saw on October 7, 2026.

Compare with similar skills

Prototype next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Prototype compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Prototype this skillfossasia/eventyay-interpretation1.6k34 repos~755Automated safety check: PassApache-2.0
Native Feel Cross Platform Desktopyetone/native-feel-skill1.9k1 repos~1.5kAutomated safety check: PassMIT
Compound Engineering PrototypeEveryInc/compound-engineering-plugin25k—~1.9kAutomated safety check: PassMIT
Collaborating With CodexGuDaStudio/collaborating-with-codex1321 repos~712Automated safety check: PassMIT
Digikeyaklofas/kicad-happy1.3k1 repos~4.5kAutomated safety check: PassMIT
Collaborating With Geminihaoyu-haoyu/Multi-AI-Workflow109—~521Automated safety check: PassMIT

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    Search DigiKey for electronic components and download datasheets — primary source for prototype orders and the preferred API method for fetching datasheets.

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Categories

Questions about Prototype

What does Prototype do?

Build a throwaway prototype to flesh out a design — a runnable terminal app for state/business-logic questions, or several radically different UI variations toggleable from one route. Prototype is an agent skill from fossasia/eventyay-interpretation. Build a throwaway prototype to flesh out a design — a runnable terminal app for state/business-logic questions, or several radically different UI variations toggleable from one route.

When should I use Prototype?

Prototype fits situations like: tasks that involve Prototyping.

How do I install Prototype in Claude Code?

Run `npx skills add fossasia/eventyay-interpretation --skill prototype -a claude-code`. Or copy the skill folder (.agents/skills/prototype in fossasia/eventyay-interpretation) into .claude/skills/prototype in your project. Claude Code loads it when a task matches its description.

How do I install Prototype in Codex?

Run `npx skills add fossasia/eventyay-interpretation --skill prototype -a codex`. Or copy the skill folder (.agents/skills/prototype in fossasia/eventyay-interpretation) into .agents/skills/prototype in your project. Codex loads it when a task matches its description.

Can I use Prototype in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add fossasia/eventyay-interpretation --skill prototype -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/prototype, .gemini/skills/prototype, .github/skills/prototype and .opencode/skills/prototype in your project.

What does Prototype need to run?

Going by SKILL.md and its folder, Prototype needs the command-line tools its instructions call (pnpm, python and bun). Our summary lists: Python 3.

Does Prototype access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Prototype safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Prototype use?

Prototype is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Prototype use?

About 755 tokens (SKILL.md is roughly 3k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Prototype?

Skills that share tags, products or a category with Prototype: Native Feel Cross Platform Desktop (yetone/native-feel-skill, 1.9k stars), Compound Engineering Prototype (EveryInc/compound-engineering-plugin, 25k stars), Collaborating With Codex (GuDaStudio/collaborating-with-codex, 132 stars) and Digikey (aklofas/kicad-happy, 1.3k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Prototype?

fossasia (a GitHub organization) maintains it in fossasia/eventyay-interpretation, which has 1,552 GitHub stars. The repository holds 41 skills in this directory. The repository was last updated on October 5, 2026.

Source: fossasia/eventyay-interpretation on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.