prototype

prototype is a skill for Claude Code, Codex from znlgis/my-opencode-deepseek-config. It costs 95 tokens per session (623 once invoked), scanned A, original, MIT.

A throwaway, runnable prototype for testing a design or interaction question. It uses a simple HTML file or a small set of visual variants so you can try an idea before building it.

In plain words
What is it for?
Use it to test whether a user flow works, compare layouts or styles, and visualize options before committing to a real implementation.
Why use it?
It replaces lengthy discussion or a detailed specification with something you can experience and evaluate. The result is meant to be discarded, not maintained as product code.

Skill for Claude CodeCodex

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/znlgis/my-opencode-deepseek-config/prototype
Any agent
npx skills add znlgis/my-opencode-deepseek-config --skill prototype
Clone the repo
git clone --depth 1 https://github.com/znlgis/my-opencode-deepseek-config

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for prototype

README.md
[![agentmods](https://agentmods.dev/badge/skills/znlgis/my-opencode-deepseek-config/prototype.svg)](https://agentmods.dev/skills/znlgis/my-opencode-deepseek-config/prototype)
Your own site
<a href="https://agentmods.dev/skills/znlgis/my-opencode-deepseek-config/prototype"><img src="https://agentmods.dev/badge/skills/znlgis/my-opencode-deepseek-config/prototype.svg" alt="Measured on agentmods" height="20"></a>
Per session 95 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 623 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00095 $0.00623
Opus 5 $0.00048 $0.00311
Sonnet 5 $0.00019 $0.00125
Haiku 4.5 $0.00010 $0.00062

Measured 3d ago against content hash 4192d619646b, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

prototype scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 3d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

opencode/skills/prototype/SKILL.md · 59 lines

How it starts

The opening of the file, as written. The whole thing — 59 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Prototype

Settle a design question empirically with the cheapest runnable artifact, then throw it away. A prototype is evidence, not product code.

When to use

  • A logic/behavior question: "does this flow work end-to-end?"
  • A UI question: "which layout/style variant is better?"
  • You are about to write a spec or have a long back-and-forth over a decision that a 5-minute demo would settle.

Not for: building real features (use deep-worker), or questions answerable by reading (use explore).

The two kinds

Question type Build
Logic / behavior a single self-contained HTML file with inline JS that interactively demonstrates the logic end-to-end
UI / style one route with 2–3 style/layout variants rendered side by side (or toggled), so the choice is visible, not argued

Iron rules

  • One day, one use. The artifact is thrown away; do not extend or maintain it.
  • One command to run. open prototype.html (or equivalent); no build step, no dependencies, no framework.
  • No persistence. No backend, no DB, no localStorage (unless the prototype is about persistence itself).
  • Skip polish. No design system, no tests, no error handling beyond what the demo needs. Fake data is fine.
  • Show state after every action. After each interaction, render the current state so the behavior is observable, not inferred.

Workflow

  1. State the design question in one sentence.
  2. Pick the kind (logic vs UI).
  3. Build the single HTML file in the working tree.
  4. Run it (open in browser); confirm it demonstrates the answer.
  5. Show the result to the user; capture the decision.
  6. Commit to a throwaway branch as the primary source (e.g. git checkout -b throwaway/prototype-<topic>), then discard after the decision is recorded.

Rules

  • Never let a prototype silently become production code.
  • If the question is still open after the demo, that is the answer: it was the wrong question — rephrase, do not extend the prototype.
  • Keep the artifact self-contained; no external CDN unless strictly required.
  • Record the decision (and the prototype's path) in the relevant plan/spec, not in the prototype.

Read the full file on GitHub · 59 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 3d ago First seen · 59 lines · 95 tokens per session scan A 4192d619646b

Subscribe to this mod's changes

prototype is a skill published in the GitHub repository znlgis/my-opencode-deepseek-config (57 stars, last pushed 5d ago), licensed MIT. It adds 95 tokens to every session and 623 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.