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Principle-based design patterns for website sections that avoid AI-generated aesthetics. \n \n Covers five core section types: heroes, cards, CTAs, trust signals, and testimonials with context-specific guidance for different business types \n Teaches WHY and WHEN to use each pattern, not just templates; includes explicit anti-patterns like democratic design, perfect symmetry, and generic copy \n Provides cross-cutting principles on hierarchy, asymmetry, and restraint that apply across all patter

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Authentication for React SPAs using Auth0 Universal Login with redirect-based flows. \n \n Supports React 16–19 with Vite or Create React App; wraps your app with Auth0Provider and exposes hooks like useAuth0() , loginWithRedirect() , and logout() \n Handles user sessions, access tokens, and profile data automatically; SDK manages secure token storage without manual localStorage handling \n Includes protected routes, API token injection, and error handling patterns documented in the integration

Ui Skills \n Overview \n Opinionated, evolving constraints to guide agents when building interfaces \n When to Use This Skill \n Use this skill when you need to work with opinionated, evolving constraints to guide agents when building interfaces. \n Instructions \n This skill provides guidance and patterns for opinionated, evolving constraints to guide agents when building interfaces. \n For more information, see the source repository .

Modern React patterns and best practices for production applications. \n \n Covers component design principles, hook extraction patterns, and state management selection across complexity levels from simple useState to global stores like Zustand and Redux Toolkit \n Includes React 19 patterns with new hooks (useActionState, useOptimistic, use) and compiler benefits for automatic memoization \n Provides composition patterns including compound components, render props vs hooks trade-offs, and highe

Fast lookup table for 30+ SaaS finance metrics, formulas, benchmarks, and red flags. \n \n Covers four metric families: Revenue & Growth, Unit Economics, Capital Efficiency, and Efficiency Ratios, each with formula, benchmark, and red flag \n Includes four decision frameworks for feature investment, channel scaling, pricing changes, and business health assessment by stage \n Organized for speed: scan the reference table, check red flags by category, apply the relevant framework to your deci

Design handoff bridges design and development, ensuring developers have all information needed to implement designs accurately and efficiently.

Core React patterns for component design, state management, and optimization.

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Build and deploy MCP servers in Python using FastMCP with tools, resources, and prompts. \n \n Scaffolds a working Python MCP server from a description; supports tools (callable functions), resources (readable data), and prompts (reusable templates) \n Includes local testing modes (direct run, dev mode with auto-reload, HTTP transport) and MCP Inspector integration \n Deploys to FastMCP Cloud, Docker, or Cloudflare Workers; pre-deploy checklist catches common issues like missing module-level ser