[Bug] --router-only main.tsx ignores getRouter() from router.tsx (router.tsx becomes dead code + duplicate Register declaration)

Which project does this relate to?

Create Tanstack App

Describe the bug

When scaffolding a Router-only SPA (create --router-only), the generated src/router.tsx exports a getRouter() factory, but the generated src/main.tsx does not use it. Instead, main.tsx builds its own router inline with createRouter(...).

As a result:

1. router.tsx / getRouter() is dead code - nothing imports it anywhere in a --router-only project.
2. The declare module '@tanstack/react-router' { interface Register { ... } } block is duplicated in both main.tsx (router: typeof router) and router.tsx (router: ReturnType<typeof getRouter>).

In the default (TanStack Start) mode this is fine because Start consumes getRouter() from router.tsx as the entry, and main.tsx is not generated. But in --router-only mode the two files diverge and router.tsx is left orphaned.

Your Example Website or App

pnpx @tanstack/cli create --router-only

Steps to Reproduce the Bug or Issue

1. pnpx @tanstack/cli create --router-only
2. Open src/main.tsx and src/router.tsx
3. Grep the project for getRouter -> only defined in router.tsx, never imported
   (No StackBlitz needed - this is reproducible purely from the CLI output.)

Expected behavior

In --router-only mode, main.tsx should import and use getRouter() from router.tsx, and the Register module augmentation should live in a single place (router.tsx). Something like:

import ReactDOM from 'react-dom/client'
import { RouterProvider } from '@tanstack/react-router'
import { getRouter } from './router'

const router = getRouter()

const rootElement = document.getElementById('app')!

if (!rootElement.innerHTML) {
  const root = ReactDOM.createRoot(rootElement)
  root.render(<RouterProvider router={router} />)
}

This keeps a single source of truth for router configuration across both Start and Router-only modes, removes the dead getRouter(), and removes the duplicate Register declaration.

Screenshots or Videos

No response

Platform

• OS: macOS
• @tanstack/cli: 0.69.5

Additional context

• packages/create/src/frameworks/react/project/base/src/main.tsx.ejs
• Line 1: <% if (!routerOnly) { ignoreFile() } %> -> only emitted for router-only
• Lines 6-16: creates its own router + declares Register instead of importing getRouter
• packages/create/src/frameworks/react/project/base/src/router.tsx.ejs
• No ignoreFile() guard -> always emitted, exports getRouter() + declares Register

The Solid templates have an identical structure:

• packages/create/src/frameworks/solid/project/base/src/main.tsx.ejs
• packages/create/src/frameworks/solid/project/base/src/router.tsx.ejs

packages/create/src/frameworks/react/project/base/src/main.tsx.ejs と router.tsx.ejs から始め、対応する Solid のテンプレートと比較します。CLI を --router-only で実行し、生成されたファイルを確認します。完了条件は、main.tsx が getRouter() を使用し、router の設定と Register 宣言が生成されたプロジェクト内で重複していないことです。