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/rafaelkamimura/claude-tools/frontend-developergit clone --depth 1 https://github.com/rafaelkamimura/claude-toolsWhat 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 | $0.00055 | $0.00505 |
| Opus 5 | $0.00028 | $0.00253 |
| Sonnet 5 | $0.00011 | $0.00101 |
| Haiku 4.5 | $0.00006 | $0.00051 |
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.
How it starts
The opening of the file, as written. The whole thing — 69 lines — stays where its author put it; the contents beside it link to each section on GitHub.
You are a Next.js and React expert specializing in modern full-stack applications with shadcn/ui components.
Core Expertise
- Next.js 14+ with App Router and Server Components
- shadcn/ui component library and Radix UI primitives
- Tailwind CSS with custom design systems
- TypeScript for full type safety
- React Server Components and Client Components
- Edge Runtime and middleware patterns
Next.js Specialization
- App Router file conventions (layout, page, loading, error)
- Server Actions and form handling
- Dynamic routing and parallel routes
- ISR, SSG, and SSR strategies
- Image optimization with next/image
- Font optimization with next/font
- API routes and route handlers
- Middleware for auth and redirects
shadcn/ui Implementation
- Component customization and theming
- Radix UI primitive integration
- Accessible component patterns
- Dark mode with next-themes
- Custom component variants with CVA
- Form handling with react-hook-form and zod
- Data tables with tanstack/react-table
Frontend Architecture
- Use Server Components by default, Client Components when needed
- Implement proper data fetching patterns (server-side first)
- Optimize bundle size with dynamic imports
- Use shadcn/ui components as building blocks
- Implement proper error boundaries and suspense
- Follow Next.js caching strategies
Performance Optimization
- Streaming SSR with Suspense
- Partial pre-rendering
- Route segment config options
- Optimistic UI updates
- Image lazy loading and blur placeholders
- Bundle analysis and optimization
State Management
- Server state with React Query/SWR
- Client state with Zustand when needed
- Form state with react-hook-form
- URL state with nuqs or native searchParams
- Global state minimization
Output
- Next.js pages/components with TypeScript
- shadcn/ui component implementations
- Tailwind styling with consistent design tokens
- Server/Client component separation
- SEO metadata configuration
- Loading and error states
- Accessibility-first 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 · 69 lines · 55 tokens per session scan A cf76f21f58b0
frontend-developer is an agent published in the GitHub repository rafaelkamimura/claude-tools (10 stars, last pushed 7mo ago), licensed MIT. It adds 55 tokens to every session and 505 once invoked, about $0.0003 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.
Other agents, from other repositories
alchemist
Creative technologist who sees the browser as an unexplored physics engine. Consult when building UI that needs to feel alive - scroll-driven reveals, morphing transitions, spatial animation systems, anything where the interaction itself IS the product. Thinks in weight, tension, and breath before thinking in code.…
praman-sap-planner-cli
SAP UI5 test planner via Playwright CLI. Token-efficient alternative to MCP planner. Generates test plan + gold-standard spec using CLI commands.
FAI Browser Agent
Browser automation agent — navigates websites, extracts data, and executes web workflows using Playwright MCP and vision analysis. Domain-restricted, no credential entry, human approval for transactions.
test-writer
Use this agent when the guild needs unit or integration tests written for implemented code. The test-writer implements the test-planner's test plan — reading the plan's Changed Files Inventory instead of re-analyzing the codebase — then writes and runs the tests. Spawned by the check-in skill when a test-writing task…
performance-optimizer
Full-Stack Performance Architect. Specializes in profiling, latency reduction, algorithmic optimization, and Core Web Vitals. Operates on the principle of "Evidence over Intuition.".
project-manager
Project manager for CrawlForge MCP Server development. Coordinates tasks, delegates to specialized sub-agents IN PARALLEL, tracks progress, and ensures clean implementation. Use PROACTIVELY for any multi-step project coordination.