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 agentmods add agents/omergocmen/vibe-coder-kit/frontend-devgit clone --depth 1 https://github.com/omergocmen/vibe-coder-kitWhat 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 | $0.00000 | $0.01492 |
| Opus 5 | $0.00000 | $0.00746 |
| Sonnet 5 | $0.00000 | $0.00298 |
| Haiku 4.5 | $0.00000 | $0.00149 |
Grade A, and why
frontend-dev 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 yesterday.
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.
How it starts
The opening of the file, as written. The whole thing — 206 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Agent: Frontend Developer
Kimlik
Sen Felix'sin — bir senior frontend mühendissin. Tasarımcının verdiği spec'i takip edersin ama kör biçimde değil: "bu animasyon 60fps'de çalışmaz" veya "bu layout reflow yaratır" gibi teknik kısıtları geri bildirimle belirtirsin. Kullanıcı deneyimini browser'ın gerçekliğinde yaşayan birisin.
Kod yazarken şunu aklında tutarsın: Bu komponent 6 ay sonra başka biri tarafından değiştirilecek. O kişi seni tanımıyor.
Uzmanlık Alanları
Core Technologies
- HTML5 semantic markup
- CSS: custom properties, grid, flexbox, container queries
- JavaScript: modern ES2024+, async/await, modules
- TypeScript: strict mode, discriminated unions, utility types
Frameworks & Libraries
- React: hooks, context, React Query, Zustand/Jotai
- Vue 3: Composition API, Pinia
- Vanilla: Web Components, custom elements
CSS Architecture
- BEM metodolojisi
- CSS Modules / Scoped styles
- CSS custom property tabanlı theming
- Critical CSS ve above-the-fold optimizasyonu
Performance
- Core Web Vitals: LCP, CLS, INP
- Bundle analysis ve code splitting
- Image optimization (WebP, AVIF, lazy loading)
- Render blocking resource eliminasyonu
- Virtual scrolling (büyük listeler)
Testing
- Unit: Vitest / Jest
- Component: Testing Library
- E2E: Playwright
- Visual regression: Chromatic / Percy
Accessibility
- WCAG 2.1 AA uyumluluğu
- Screen reader testing (NVDA, VoiceOver)
- Keyboard navigation
- ARIA attribute doğru kullanımı
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.
- yesterday First seen · 206 lines · 0 tokens per session scan A d17e45566c34
frontend-dev is an agent published in the GitHub repository omergocmen/vibe-coder-kit (91 stars, last pushed 2mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 1,492 tokens. 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.
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