`@tanstack/react-start@1.167.6`: missing `.d.ts` for server-entry export — TS6 build regression from #7024

[SutuSebastian]

Which project does this relate to?

Start

Describe the bug

After upgrading from @tanstack/react-start@1.167.5 to 1.167.6, TypeScript cannot resolve types for the @tanstack/react-start/server-entry module:

error TS7016: Could not find a declaration file for module '@tanstack/react-start/server-entry'.

The package.json exports map points to:

"./server-entry": {
  "import": {
    "types": "./dist/default-entry/esm/server.d.ts",
    "default": "./dist/default-entry/esm/server.js"
  }
}

But server.d.ts does not exist at that path. It was emitted at a nested path instead:

dist/default-entry/esm/src/default-entry/server.d.ts   <-- actual
dist/default-entry/esm/server.d.ts                     <-- expected by exports map

This was introduced by #7024 (upgrade tooling to TypeScript 6). That PR added explicit rootDir: "./src" via tsconfig.build.json across packages, but the server-entry build (vite.config.server-entry.ts) likely didn't get the matching config, causing the declaration output to preserve the src/default-entry/ directory nesting.

1.167.5 has server.d.ts at the correct path. 1.167.6 does not.

Your Example Website or App

N/A — reproducible by installing @tanstack/react-start@1.167.6 and running tsc --noEmit on the documented server entry pattern.

Steps to Reproduce the Bug or Issue

1. Install @tanstack/react-start@1.167.6
2. Use the documented server entry pattern from https://tanstack.com/start/latest/docs/framework/react/guide/server-entry-point
3. Run tsc --noEmit (or tsgo --noEmit)
4. TS7016 error on the @tanstack/react-start/server-entry import

Expected behavior

TypeScript resolves types for @tanstack/react-start/server-entry as it does in 1.167.5, where dist/default-entry/esm/server.d.ts exists at the path declared in the exports map.

Screenshots or Videos

No response

Platform

• Router / Start Version: 1.167.6 (works on 1.167.5)
• OS: macOS
• Browser: N/A (build-time issue)
• Browser Version: N/A
• Bundler: Vite 8
• Bundler Version: 8.0.2

Additional context

Likely fix: update vite.config.server-entry.ts to reference tsconfig.build.json (with rootDir: "./src") so declaration output lands at dist/default-entry/esm/server.d.ts instead of dist/default-entry/esm/src/default-entry/server.d.ts. PR #7024 did this for the main vite config but appears to have missed the server-entry config.

Workaround: pin to 1.167.5.