diff --git a/CLAUDE.md b/CLAUDE.md
new file mode 100644
index 00000000..10944a4c
--- /dev/null
+++ b/CLAUDE.md
@@ -0,0 +1,119 @@
+# CLAUDE.md
+
+This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
+
+## Project Overview
+
+Streamyfin is a cross-platform Jellyfin video streaming client built with Expo (React Native). It supports mobile (iOS/Android) and TV platforms, with features including offline downloads, Chromecast support, and Jellyseerr integration.
+
+## Development Commands
+
+**CRITICAL: Always use `bun` for package management. Never use `npm`, `yarn`, or `npx`.**
+
+```bash
+# Setup
+bun i && bun run submodule-reload
+
+# Development builds
+bun run prebuild              # Mobile prebuild
+bun run ios                   # Run iOS
+bun run android               # Run Android
+
+# TV builds (suffix with :tv)
+bun run prebuild:tv
+bun run ios:tv
+bun run android:tv
+
+# Code quality
+bun run typecheck             # TypeScript check
+bun run check                 # BiomeJS check
+bun run lint                  # BiomeJS lint + fix
+bun run format                # BiomeJS format
+bun run test                  # Run all checks (typecheck, lint, format, doctor)
+
+# iOS-specific
+bun run ios:install-metal-toolchain  # Fix "missing Metal Toolchain" build errors
+```
+
+## Tech Stack
+
+- **Runtime**: Bun
+- **Framework**: React Native (Expo SDK 54)
+- **Language**: TypeScript (strict mode)
+- **State Management**: Jotai (global state atoms) + React Query (server state)
+- **API**: Jellyfin SDK (`@jellyfin/sdk`)
+- **Navigation**: Expo Router (file-based)
+- **Linting/Formatting**: BiomeJS
+- **Storage**: react-native-mmkv
+
+## Architecture
+
+### File Structure
+
+- `app/` - Expo Router screens with file-based routing
+- `components/` - Reusable UI components
+- `providers/` - React Context providers
+- `hooks/` - Custom React hooks
+- `utils/` - Utilities including Jotai atoms
+- `modules/` - Native modules (vlc-player, mpv-player, background-downloader)
+- `translations/` - i18n translation files
+
+### Key Patterns
+
+**State Management**:
+- Global state uses Jotai atoms in `utils/atoms/`
+- `settingsAtom` in `utils/atoms/settings.ts` for app settings
+- `apiAtom` and `userAtom` in `providers/JellyfinProvider.tsx` for auth state
+- Server state uses React Query with `@tanstack/react-query`
+
+**Jellyfin API Access**:
+- Use `apiAtom` from `JellyfinProvider` for authenticated API calls
+- Access user via `userAtom`
+- Use Jellyfin SDK utilities from `@jellyfin/sdk/lib/utils/api`
+
+**Navigation**:
+- File-based routing in `app/` directory
+- Tab navigation: `(home)`, `(search)`, `(favorites)`, `(libraries)`, `(watchlists)`
+- Shared routes use parenthesized groups like `(home,libraries,search,favorites,watchlists)`
+
+**Providers** (wrapping order in `app/_layout.tsx`):
+1. JotaiProvider
+2. QueryClientProvider
+3. JellyfinProvider (auth, API)
+4. NetworkStatusProvider
+5. PlaySettingsProvider
+6. WebSocketProvider
+7. DownloadProvider
+8. MusicPlayerProvider
+
+### Native Modules
+
+Located in `modules/`:
+- `vlc-player` - VLC video player integration
+- `mpv-player` - MPV video player integration (iOS)
+- `background-downloader` - Background download functionality
+- `sf-player` - Swift player module
+
+### Path Aliases
+
+Use `@/` prefix for imports (configured in `tsconfig.json`):
+```typescript
+import { useSettings } from "@/utils/atoms/settings";
+import { apiAtom } from "@/providers/JellyfinProvider";
+```
+
+## Coding Standards
+
+- Use TypeScript for all files (no .js)
+- Use functional React components with hooks
+- Use Jotai atoms for global state, React Query for server state
+- Follow BiomeJS formatting rules (2-space indent, semicolons, LF line endings)
+- Handle both mobile and TV navigation patterns
+- Use existing atoms, hooks, and utilities before creating new ones
+- Use Conventional Commits: `feat(scope):`, `fix(scope):`, `chore(scope):`
+
+## Platform Considerations
+
+- TV version uses `:tv` suffix for scripts
+- Platform checks: `Platform.isTV`, `Platform.OS === "android"` or `"ios"`
+- Some features disabled on TV (e.g., notifications, Chromecast)