Sends a daily Discord digest of new public vals. It grabs previews of READMEs when it exists. When there's no README, it sends the code to GPT-4o for a summary.

• main.tsx - Main cron function and Discord webhook
• fetch-vals.ts - Fetches and filters new vals using Val Town SDK
• ai-summarizer.ts - Generates OpenAI summaries for vals without READMEs

• Filter out vals that start with untitled- (auto-generated names), blank vals with no files, or vals with an empty main.tsx
• Skip READMEs that only contains a single header (e.g., "# My Val" with nothing else)
• Filter out commonly remixed utility vals like Blob Admin, SQLiteExplorer
• Skip shallow remixes (forks with ≤3 versions)
• Prioritize main.tsx files for AI summaries and limit code sent to OpenAI to 5KB to avoid token limits

1. Set DISCORD_WEBHOOK environment variable
2. Set OPENAI_API_KEY environment variable
3. Set testMode = false in main.tsx for production