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.
npx skills add andrewcigan/vibe-dev-plugin --skill prototypegit clone --depth 1 https://github.com/andrewcigan/vibe-dev-pluginWrote 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.
[](https://agentmods.dev/skills/andrewcigan/vibe-dev-plugin/prototype)<a href="https://agentmods.dev/skills/andrewcigan/vibe-dev-plugin/prototype"><img src="https://agentmods.dev/badge/skills/andrewcigan/vibe-dev-plugin/prototype/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/andrewcigan/vibe-dev-plugin/prototype"><img src="https://agentmods.dev/badge/skills/andrewcigan/vibe-dev-plugin/prototype.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00062 | $0.00294 |
| Opus 5.5 | $0.00025 | $0.00118 |
| Sonnet 5.5 | $0.00012 | $0.00059 |
| Haiku 4.5 | $0.00006 | $0.00029 |
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 1mo 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.
What it actually says
/prototype
HTML-прототип через prototype-builder agent.
Что происходит
- Subagent
prototype-builder(Sonnet) читает PRODUCT.md, user-stories, ARCHITECTURE.md - Identify главный user flow (один!)
- Build
prototype/index.html(HTML + Tailwind CDN + inline mock data) - 1-3 экрана связанных, главный flow работает
- Пользователь открывает в браузере и тестирует
Output
prototype/index.html- (опц.)
prototype/screen-2.html,screen-3.html
НЕ делаем
- Финальный дизайн (для этого /design-handoff → Claude Design)
- Реальный backend (это не MVP)
- Все экраны (один flow)
Дальше
После confirm пользователя — /choose-stack.
Cost
$1.50. Без external API.
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.
- 1mo ago First seen · 37 lines · 62 tokens per session scan A a573cc988d7b
prototype is a skill published in the GitHub repository andrewcigan/vibe-dev-plugin (5 stars, last pushed 13d ago), licensed MIT. It adds 62 tokens to every session and 294 once invoked, about $0.0002 per session on Opus 5.5. 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 2026-08-31.
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