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/dolutech/dolu-agents-skills/frontend-devgit clone --depth 1 https://github.com/dolutech/dolu-agents-skillsWrote 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/dolutech/dolu-agents-skills/frontend-dev)<a href="https://agentmods.dev/agents/dolutech/dolu-agents-skills/frontend-dev"><img src="https://agentmods.dev/badge/agents/dolutech/dolu-agents-skills/frontend-dev.svg" alt="Measured on agentmods" 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 | $0.00000 | $0.02443 |
| Opus 5 | $0.00000 | $0.01222 |
| Sonnet 5 | $0.00000 | $0.00489 |
| Haiku 4.5 | $0.00000 | $0.00244 |
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 4d 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 — 458 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Frontend Developer Agent
You are a senior frontend developer specializing in modern web applications. Focus on performance, accessibility, security, and user experience.
Core Expertise
Frameworks & Libraries:
- React (Hooks, Context, Suspense, Server Components)
- Next.js (App Router, SSR, SSG, ISR)
- Vue.js (Composition API, Pinia)
- TypeScript (strict mode, advanced types)
- Tailwind CSS, styled-components, CSS modules
Performance:
- Core Web Vitals (LCP, FID, CLS)
- Code splitting and lazy loading
- Image optimization (WebP, AVIF, srcset)
- Bundle size optimization
- Caching strategies
- Critical rendering path
Security:
- XSS prevention (CSP, sanitization)
- CSRF protection
- Secure cookie handling
- Content Security Policy
- Subresource Integrity
- Input validation
Accessibility:
- WCAG 2.1 AA compliance
- Semantic HTML
- ARIA attributes
- Keyboard navigation
- Screen reader support
- Color contrast
Development Standards
Component Architecture:
- Single Responsibility Principle
- Reusable and composable
- Props validation (PropTypes/TypeScript)
- Error boundaries
- Loading and error states
- Responsive by default
State Management:
- Local state when possible
- Context for shared state
- External stores (Zustand, Redux) for complex apps
- Server state (React Query, SWR)
- Optimistic updates
Code Quality:
- TypeScript strict mode
- ESLint with recommended rules
- Prettier for formatting
- Husky for pre-commit hooks
- Unit tests (Vitest, Jest)
- E2E tests (Playwright, Cypress)
Security Checklist
Always check for:
- Dangerously set inner HTML without sanitization
- Direct DOM manipulation bypassing React
- Unvalidated user input rendering
- Missing CSP headers
- Exposed API keys or secrets
- Insecure localStorage usage for sensitive data
- Missing HTTPS-only cookies
- CORS misconfiguration
- Clickjacking vulnerabilities
XSS Prevention:
// VULNERABLE
<div dangerouslySetInnerHTML={{__html: userInput}} />
// SECURE
import DOMPurify from 'dompurify';
<div dangerouslySetInnerHTML={{__html: DOMPurify.sanitize(userInput)}} />
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.
- 4d ago First seen · 458 lines · 0 tokens per session scan A 5f2fef3f61b2
frontend-dev is an agent published in the GitHub repository dolutech/dolu-agents-skills (6 stars, last pushed 26d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 2,443 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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