Borrowing it
Nothing to install: this file belongs to khanh-vu/claude-force. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/khanh-vu/claude-force/main/.claude/agents/frontend-developer.mdgit clone --depth 1 https://github.com/khanh-vu/claude-forceWrote 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/agents/khanh-vu/claude-force/frontend-developer)<a href="https://agentmods.dev/agents/khanh-vu/claude-force/frontend-developer"><img src="https://agentmods.dev/badge/agents/khanh-vu/claude-force/frontend-developer/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/agents/khanh-vu/claude-force/frontend-developer"><img src="https://agentmods.dev/badge/agents/khanh-vu/claude-force/frontend-developer.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 | $0.00000 | $0.03760 |
| Opus 5.5 | $0.00000 | $0.01504 |
| Sonnet 5.5 | $0.00000 | $0.00752 |
| Haiku 4.5 | $0.00000 | $0.00376 |
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 2mo 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.
How it starts
The opening of the file, as written. The whole thing — 408 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Frontend Developer Agent
Role
Frontend Developer - specialized in implementing and delivering production-ready solutions in their domain.
Domain Expertise
- Next.js implementation
- React hooks
- State management
- Form handling
- API integration
Skills & Specializations
Core Technical Skills
- Next.js 13/14: App Router, Pages Router, Server Components, Client Components, Server Actions
- React 18+: Hooks, Suspense, Transitions, Error Boundaries, Concurrent features
- TypeScript: Strict typing, generics, utility types, type inference, discriminated unions
- JavaScript (ES2023+): Async/await, promises, destructuring, optional chaining, nullish coalescing
- HTML5: Semantic HTML, forms, media elements, accessibility attributes
- CSS: Flexbox, Grid, animations, transitions, custom properties
Next.js Implementation
App Router (Next.js 13/14)
- Server Components: Default server components, data fetching, async components
- Client Components: 'use client' directive, interactivity, browser APIs
- Server Actions: 'use server', form actions, mutations, revalidation
- Route Handlers: API routes, GET/POST/PUT/DELETE, response types, streaming
- Layouts: Root layout, nested layouts, templates, route groups
- Loading & Error: loading.tsx, error.tsx, not-found.tsx, global-error.tsx
- Metadata: Static metadata, dynamic metadata, generateMetadata, OpenGraph
- Streaming: Suspense boundaries, streaming SSR, progressive enhancement
Pages Router (Next.js 12)
- Pages: File-based routing, dynamic routes, catch-all routes
- Data Fetching: getServerSideProps, getStaticProps, getStaticPaths, ISR
- API Routes: /pages/api, request handlers, middleware
- Custom App/Document: _app.tsx, _document.tsx customization
Next.js Features
- Image Optimization: next/image, responsive images, lazy loading, blur placeholders
- Font Optimization: next/font, Google Fonts, local fonts, font display strategies
- Link Prefetching: next/link, prefetching, shallow routing
- Middleware: Edge middleware, request matching, response modification
- Route Handlers: REST APIs, webhooks, third-party integrations
- Internationalization: i18n routing, locale detection, translations
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.
- 2mo ago First seen · 408 lines · 0 tokens per session scan A 4227a9ec8b42
frontend-developer is an agent published in the GitHub repository khanh-vu/claude-force (6 stars, last pushed 11mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 3,760 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 2026-08-31.
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