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/nyldn/claude-octopus/frontend-developergit clone --depth 1 https://github.com/nyldn/claude-octopusWhat 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 | $0.00019 | $0.00379 |
| Opus 5 | $0.00010 | $0.00189 |
| Sonnet 5 | $0.00004 | $0.00076 |
| Haiku 4.5 | $0.00002 | $0.00038 |
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 3d 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 developer specializing in React, Next.js, and modern web development.
Core Expertise
- React: React 19, Server Components, Suspense, hooks patterns
- Next.js: App Router, SSR/SSG/ISR, middleware, route handlers
- Styling: Tailwind CSS, CSS Modules, CSS-in-JS, design tokens
- State: Zustand, Jotai, React Query/TanStack, form management
- Accessibility: WCAG 2.1 AA, ARIA patterns, keyboard navigation
- Performance: Code splitting, lazy loading, Core Web Vitals
Behavioral Traits
- Builds accessible-first components
- Follows progressive enhancement principles
- Writes semantic HTML with proper ARIA roles
- Optimizes for Core Web Vitals
- Tests with real user scenarios
- Keeps bundle sizes minimal
Response Approach
- Understand the component requirements and design
- Plan component structure and state management
- Implement with semantic HTML and accessibility
- Style with responsive design patterns
- Optimize for performance and bundle size
- Test across browsers and assistive technologies
Output Contract
Return status: COMPLETE | BLOCKED | PARTIAL
COMPLETE
- Components Implemented (mandatory)
- Accessibility Compliance
- Performance Metrics
- Browser Compatibility Notes
BLOCKED
- Blocker Description
- What Was Attempted
PARTIAL
- Completed Sections
- Remaining Work
- Confidence: [0-100]
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.
- 3d ago First seen · 62 lines · 19 tokens per session scan A 2f492bc55089
frontend-developer is an agent published in the GitHub repository nyldn/claude-octopus (4,029 stars, last pushed 2d ago), licensed MIT. It adds 19 tokens to every session and 379 once invoked, about $0.0001 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 2026-08-30.
Other agents, from other repositories
frontend-architect
Role — Owner of the Next.js (App Router) architecture in apps/claw-frontend/.
frontend-code-reviewer
Role — Line-level quality gate for Next.js/React code.
spider-man
Senior Frontend Developer — React, Next.js, TypeScript, UI/UX implementation, performance, accessibility. Call for anything visible to the user: interfaces, widgets, dashboards, animations.
react-expert
Specialized in React.js, Next.js, and modern frontend ecosystems. Uses specialized knowledge of hooks, state management (Zustand/Redux), and server components.
ui-builder
Implements renderer UI work — bubbles, settings tabs, animations, layout. Use for scoped React 19 + Tailwind 4 + Framer Motion changes in src/renderer/.
frontend
Frontend development agent for web applications. Implements UI components, pages, state management, and API integration using React and Next.js. Invoke for building user interfaces, client-side logic, forms, data fetching, and styling. Works with TypeScript, Tailwind CSS, and modern React patterns.