frontend▌

Only code in HTML/Tailwind in a single code block. Any CSS styles should be in the style attribute. Start with a response, then code and finish with a response. Don't mention about tokens, Tailwind or HTML. Always include the html, head and body tags. Use lucide icons for javascript, 1.5 strokewidth. Unless style is specified by user, design in the style of Linear, Stripe, Vercel, Tailwind UI (IMPORTANT: don't mention names). Checkboxes, sliders, dropdowns, toggles should be custom (don't add, o

File Organization: This skill uses split structure. See references/ for advanced patterns.

You are a frontend engineer focused on transforming designs into clean React code. You follow a modular approach and use automated tools to ensure code quality.

This skill contains the complete design system for Claude's built-in show_widget tool — the generative UI feature that renders interactive HTML/SVG widgets inline in claude.ai conversations. The guidelines below are the actual Anthropic "Imagine — Visual Creation Suite" design rules, extracted so you can produce high-quality widgets directly without needing the read_me setup call.

Transform functional UI into visually stunning interfaces without design mockups. \n \n Specializes in visual enhancement, micro-interactions, and creative styling using modern CSS, Tailwind, and animation libraries like Framer Motion \n Covers color theory, typography hierarchy, spacing systems, and accessibility standards (WCAG AA contrast, keyboard navigation, reduced-motion support) \n Includes reusable patterns for glassmorphism cards, skeleton loaders, and common UI components with product

Design banners across social, ads, web, and print formats. Generates multiple art direction options per request with AI-powered visual elements. This skill handles banner design only. Does NOT handle video editing, full website design, or print production.

Audit UI code against Vercel's Web Interface Guidelines for design and accessibility compliance. \n \n Fetches the latest guidelines from a remote source before each review, ensuring rules stay current \n Accepts file paths or patterns as arguments; prompts for files if none provided \n Outputs findings in a terse file:line format for quick scanning and remediation \n Covers design, accessibility, and UX best practices as defined in the guidelines repository \n

Create, test, and iteratively improve AI agent skills with structured evaluation and benchmarking. \n \n Guides you through the full skill development lifecycle: intent capture, drafting, test case creation, evaluation, and iteration based on user feedback \n Runs parallel test cases with and without the skill to measure impact, capturing timing and token usage for quantitative comparison \n Generates an interactive browser-based reviewer showing outputs, qualitative feedback, and benchmark metr

UnoCSS is an instant atomic CSS engine designed to be flexible and extensible. The core is un-opinionated - all CSS utilities are provided via presets. It's a superset of Tailwind CSS, so you can reuse your Tailwind knowledge for basic syntax usage.

Create, edit, and analyze Excel spreadsheets with formulas, formatting, and error-free calculations. \n \n Supports reading, creating, and modifying .xlsx, .xlsm, .csv, and .tsv files using pandas for data analysis and openpyxl for formulas and formatting \n Automatically recalculates all formulas and scans for Excel errors (#REF!, #DIV/0!, #VALUE!, #N/A, #NAME?) using LibreOffice integration \n Enforces industry-standard color coding and number formatting for financial models (blue for inputs,