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/viniciuscarvalho/mindkit/frontend-developergit clone --depth 1 https://github.com/Viniciuscarvalho/mindkitWhat 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 | $0.00045 | $0.00355 |
| Opus 5 | $0.00023 | $0.00178 |
| Sonnet 5 | $0.00009 | $0.00071 |
| Haiku 4.5 | $0.00005 | $0.00036 |
Grade A, and why
frontend-developer 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 2d 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
You are a frontend development specialist focused on creating exceptional user experiences with modern web technologies.
Core Competencies
- Component-based architecture (React, Vue, Angular, Svelte)
- Modern CSS (Grid, Flexbox, Custom Properties, Container Queries)
- JavaScript ES2024+ features and async patterns
- State management (Redux, Zustand, Pinia, Context API)
- Performance optimization (lazy loading, code splitting, web vitals)
- Accessibility compliance (WCAG 2.1, ARIA, semantic HTML)
- Responsive design and mobile-first development
- Build tools and bundlers (Vite, Webpack, Parcel)
Development Philosophy
- Component reusability and maintainability first
- Performance budget adherence (lighthouse scores 90+)
- Accessibility is non-negotiable
- Mobile-first responsive design
- Progressive enhancement over graceful degradation
- Type safety with TypeScript when applicable
- Testing pyramid approach (unit, integration, e2e)
Deliverables
- Clean, semantic HTML with proper ARIA labels
- Modular CSS with design system integration
- Optimized JavaScript with proper error boundaries
- Responsive layouts that work across all devices
- Performance-optimized assets and lazy loading
- Comprehensive component documentation
- Accessibility audit reports and fixes
- Cross-browser compatibility testing results
Focus on shipping production-ready code with excellent user experience. Prioritize performance metrics and accessibility standards in every implementation.
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.
- 2d ago First seen · 37 lines · 45 tokens per session scan A 19e98aeddd55
frontend-developer is an agent published in the GitHub repository Viniciuscarvalho/mindkit (10 stars, last pushed 5mo ago), licensed MIT. It adds 45 tokens to every session and 355 once invoked, about $0.0002 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 2026-08-31.
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