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.env.example

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+# Spotify API Credentials
+# Get these from https://developer.spotify.com/dashboard/
+SPOTIFY_CLIENT_ID=your_spotify_client_id
+SPOTIFY_CLIENT_SECRET=your_spotify_client_secret
+
+# YouTube/Google API Credentials
+# Get these from https://console.cloud.google.com/
+# Enable "YouTube Data API v3" and create OAuth 2.0 credentials
+YOUTUBE_CLIENT_ID=your_youtube_client_id
+YOUTUBE_CLIENT_SECRET=your_youtube_client_secret
+
+# Session Secret (generate a random string)
+SESSION_SECRET=your_random_session_secret_here
+
+# Server Port
+PORT=3000
+
+# Base URL (used for OAuth callbacks)
+# IMPORTANT: Spotify requires HTTPS for callbacks!
+# For local development, use a tool like local-ssl-proxy or ngrok
+BASE_URL=https://localhost:3000
+
+# Cache Settings
+# Path where analysis jobs are cached (relative or absolute)
+CACHE_PATH=./cache
+# Maximum playlist size (tracks) that can be analyzed
+MAX_PLAYLIST_SIZE=50
+
+# Rate Limiting
+# Delay between YouTube API calls in milliseconds
+RATE_LIMIT_DELAY_MS=2000