- Create api/relay.ts: Vercel serverless function handler that reuses relay logic from src/lib/relay-utils.ts and src/middleware/ - Export default fetch handler (no Bun.serve()) for Vercel Functions - Fix vercel.json: use @vercel/node@5 runtime with proper routing via rewrites to catch all traffic to the relay handler - Remove stale buildCommand/outputDirectory (Vercel handles function builds) Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>