docs: add CLAUDE.md for project guidance and essential commands

CLAUDE.md

@@ -0,0 +1,50 @@
+# CLAUDE.md
+
+This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
+
+## Project Overview
+
+This is a Next.js 15.3.3 application with TypeScript, React 18, and Firebase hosting. The app exposes harmful activities and supports Kristen Jacobs through a GoFundMe campaign.
+
+## Essential Commands
+
+```bash
+# Development
+npm run dev          # Start dev server with Turbopack on port 9002
+npm run genkit:dev   # Start Genkit AI development server
+npm run genkit:watch # Start Genkit with file watching
+
+# Production
+npm run build        # Build the Next.js application
+npm run start        # Start production server
+
+# Quality Checks
+npm run lint         # Run Next.js linting
+npm run typecheck    # Run TypeScript type checking
+```
+
+## Architecture Overview
+
+### App Structure
+- **App Router**: Uses Next.js App Router in `src/app/`
+- **Pages**: Homepage, Gallery (YouTube videos), Dadvocate (curated videos), Long Story
+- **Static Generation**: Pages use static generation with ISR for external data
+- **Deployment**: Supports GitHub Pages, Firebase App Hosting, and Vercel
+
+### Key Patterns
+1. **UI Components**: Full shadcn/ui component library in `src/components/ui/`
+2. **Styling**: Tailwind CSS with custom theme, use `cn()` utility for class merging
+3. **Data Fetching**: Server-side fetching in page components with fallback data
+4. **Environment Variables**: Only `YOUTUBE_API_KEY` is used
+5. **Path Alias**: Use `@/` for imports from `src/` directory
+
+### Development Notes
+- **Build Configuration**: TypeScript and ESLint errors are ignored during builds
+- **YouTube API**: Gallery and Dadvocate pages fetch video data with 1-hour cache
+- **AI Integration**: Genkit setup exists but is minimally implemented
+- **Theme**: Dark/light mode support via next-themes
+
+### Adding Features
+- New pages: Create directory in `src/app/` with `page.tsx` and metadata export
+- New components: Add to `src/components/` or use existing shadcn/ui components
+- API integration: Use server components with async/await and error handling