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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,

Automatically transforms vague requirements into actionable PRDs through systematic clarification with a 100-point scoring system.

Professional UI/UX design creation in Penpot with MCP tools, design systems, and accessibility standards. \n \n Four MCP tools enable design creation, modification, export, and API access within Penpot's plugin context \n Includes discovery workflow to identify existing design systems, components, and tokens before building new designs \n Covers responsive layouts for mobile (375×812), desktop (1440×900), and platform-specific guidelines (iOS, Android, Material Design) \n Provides default design

Comprehensive design system with 50+ styles, 97 palettes, and 57 font pairings across 9 technology stacks. \n \n Searchable database organized by priority: accessibility and touch interaction (critical), performance and layout (high), typography and animation (medium), and charts (low) \n Includes design system generation tool that recommends complete patterns, styles, colors, typography, and effects based on product type and industry keywords \n Covers 9 implementation stacks: HTML/Tailwind, Re

These rules are distilled from Matthew Butterick's Practical Typography (https://practicaltypography.com). Butterick is a typographer, writer, and type designer whose work bridges professional typography and everyday digital writing. Thank you, Matthew, for making this knowledge accessible and encyclopedic. If you find this skill valuable, consider supporting his work directly.

This skill enables conversion from Markdown or HTML to professional PowerPoint presentations using Marp (Markdown Presentation Ecosystem). Create beautiful, consistent slides using simple Markdown syntax with CSS-based themes.

Production-ready React Native patterns with Expo, navigation, offline-first architecture, and native module integration. \n \n Covers Expo Router for file-based navigation, authentication flows with secure token storage, and route protection patterns \n Includes offline-first data sync using React Query with AsyncStorage persistence and online status detection \n Demonstrates native module integration for haptics, biometrics, push notifications, and platform-specific code patterns \n Provides pe