The Vercel team has introduced the Build Output API, a file-system-based specification that allows any framework to build for Vercel and utilize its infrastructure building blocks like Edge Functions, Edge Middleware, Incremental Static Regeneration (ISR), Image Optimization, and more. This new specification enables powerful capabilities with Vercel CLI, including building projects locally or in CI environments, deploying prebuilt outputs directly to Vercel, and debugging builds locally. The Build Output API decouples build from deploy, allowing developers to run and debug builds locally without having to share source code with Vercel. This empowers any developer to create when inspiration strikes, regardless of their infrastructure. Frameworks like SvelteKit, Astro, Nuxt, SolidJS, and more have adopted the Build Output API, providing zero-configuration adapters for deployment. The Vercel team is now sponsoring these frameworks, further investing in frontend development.