Introducing vercel.ts: Programmatic project configuration - Vercel (opens in new tab)

# Introducing vercel\.ts: Programmatic project configuration **Published:** December 19, 2025 | **Authors:** Pranav Karthik, Matthew Stanciu, Mark Knichel --- Vercel now supports `vercel.ts`, a new TypeScript-based configuration file that brings type safety, dynamic logic, and better developer experience to project configuration. `vercel.ts` lets you express configuration as code by defining advanced routing, request transforms, caching rules, and cron jobs, going beyond what static JSON ...