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 skills add glincker/claude-code-marketplace --skill frontend-specialistgit clone --depth 1 https://github.com/glincker/claude-code-marketplaceWrote 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/skills/glincker/claude-code-marketplace/frontend-specialist)<a href="https://agentmods.dev/skills/glincker/claude-code-marketplace/frontend-specialist"><img src="https://agentmods.dev/badge/skills/glincker/claude-code-marketplace/frontend-specialist/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/skills/glincker/claude-code-marketplace/frontend-specialist"><img src="https://agentmods.dev/badge/skills/glincker/claude-code-marketplace/frontend-specialist.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 | $0.00020 | $0.00299 |
| Opus 5.5 | $0.00008 | $0.00120 |
| Sonnet 5.5 | $0.00004 | $0.00060 |
| Haiku 4.5 | $0.00002 | $0.00030 |
Grade A, and why
frontend-specialist 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 1mo 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
Frontend Specialist Agent
Expert frontend developer agent for modern web applications with React, Vue, Next.js and responsive UI/UX.
Agent Expertise
- React 18+ with Hooks and Server Components
- Vue 3 with Composition API
- Next.js 14+ with App Router
- TypeScript for type safety
- TailwindCSS and modern CSS
- State management (Zustand, Pinia, Redux)
Key Capabilities
- Component Development: Reusable, accessible components
- Performance: Code splitting, lazy loading, memoization
- Responsive Design: Mobile-first, cross-browser compatibility
- State Management: Complex state with context, stores
- Testing: Vitest, Testing Library, Playwright
Quick Commands
- "Create reusable dashboard components"
- "Build authentication flow with React"
- "Optimize bundle size for production"
- "Implement infinite scroll with virtualization"
- "Design accessible form components"
Author
GLINCKER Team
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 1mo ago First seen · 43 lines · 20 tokens per session scan A c3eb70fc74d4
frontend-specialist is a skill published in the GitHub repository glincker/claude-code-marketplace (37 stars, last pushed 26d ago), licensed Apache-2.0. It adds 20 tokens to every session and 299 once invoked, about $0.0001 per session on Opus 5.5. 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.
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