vercel__workflow/.changeset/pre/web-vercel-preset.md

@workflow/web

@workflow/web
patch

Configure vercelPreset() from @vercel/react-router/vite in react-router.config.ts when building the packages/web project for the Vercel deployment, enabling per-route bundle splitting, function-level configuration, and an accurate Deployment Summary.

The preset is gated on a new WORKFLOW_WEB_VERCEL_BUILD environment variable (rather than the ambient VERCEL var) so that the standard build layout consumed by server.js (self-hosted deployments and the CLI's in-process server via @workflow/web/server) is still produced when the package is packed as a tarball by the docs Vercel deployment. Set WORKFLOW_WEB_VERCEL_BUILD=1 in the web Vercel project's environment variables to enable the preset there. The existing VERCEL-based checks in vite.config.ts have been migrated to this same variable for consistency.