fix: opt into SSR type level serializability check

[schiller-manuel]

default false was not working for plain router

fixes #5222

Summary by CodeRabbit

• Refactor

  • Standardized SSR registration across React Start and Solid Start by introducing a unified SSR flag in public typings.
  • Added a shared SSR type in the router core and updated internal serializers to use it.
  • No runtime behavior changes; improvements are type-level only.

• Chores

  • Regenerated route trees in examples and end-to-end setups to include the SSR flag, ensuring consistent SSR-aware type checking across projects.

[coderabbitai]

Caution

Review failed

The pull request is closed.

Walkthrough

Adds an ssr: true property to Register interface augmentations across React Start and Solid Start routeTree.gen.ts files. Introduces a new RegisteredSsr type in router-core and updates serializer transformer types to use it. Updates start-plugin-core to declare ssr: true in its Register module augmentation.

Changes

Cohort / File(s)	Summary
React Start e2e typings e2e/react-start/*/src/routeTree.gen.ts	Augment module @tanstack/react-start: add ssr: true to interface Register alongside existing router typing.
Solid Start e2e typings e2e/solid-start/*/.../routeTree.gen.ts	Augment module @tanstack/solid-start: add ssr: true to interface Register alongside existing router typing.
React Start examples typings examples/react/*/src/routeTree.gen.ts	Augment module @tanstack/react-start: add ssr: true to interface Register.
Solid Start examples typings examples/solid/*/routeTree.gen.ts	Augment module @tanstack/solid-start: add ssr: true to interface Register.
Router-core types packages/router-core/src/router.ts	Add exported utility type RegisteredSsr<TRegister = Register> inferring ssr presence; defaults to false when absent.
Router-core serializer transformer packages/router-core/src/ssr/serializer/transformer.ts	Replace inline SSR inference with RegisteredSsr<TRegister> in conditional branches of ValidateSerializableLifecycleResult.
Start plugin core declaration packages/start-plugin-core/src/start-router-plugin/plugin.ts	Module augmentation for @tanstack/${corePluginOpts.framework}-start: add ssr: true to interface Register.

Sequence Diagram(s)

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

Possibly related PRs

• fix(router-core): avoid infinite serializer recursion for arrays #5199 — Touches the same serializer types in packages/router-core/src/ssr/serializer/transformer.ts, potentially interacting with the new RegisteredSsr-based branching.

Suggested labels

package: router-core

Poem

I thump my paw—types align!
Little ssr: true, a tidy sign.
Routes all whisper, “Server’s near,”
While serializers lend an ear.
In burrows of generics, I hop with glee—
Compile-time carrots for you and me. 🥕✨

✨ Finishing touches

• 📝 Generate Docstrings

🧪 Generate unit tests

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch ssr-optin

---

📜 Recent review details

Configuration used: CodeRabbit UI

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 86aa74e and 91ccee2.

📒 Files selected for processing (42)

• e2e/react-start/basic-auth/src/routeTree.gen.ts (1 hunks)
• e2e/react-start/basic-react-query/src/routeTree.gen.ts (1 hunks)
• e2e/react-start/basic-tsr-config/src/routeTree.gen.ts (1 hunks)
• e2e/react-start/basic/src/routeTree.gen.ts (1 hunks)
• e2e/react-start/custom-basepath/src/routeTree.gen.ts (1 hunks)
• e2e/react-start/query-integration/src/routeTree.gen.ts (1 hunks)
• e2e/react-start/scroll-restoration/src/routeTree.gen.ts (1 hunks)
• e2e/react-start/selective-ssr/src/routeTree.gen.ts (1 hunks)
• e2e/react-start/serialization-adapters/src/routeTree.gen.ts (1 hunks)
• e2e/react-start/server-functions/src/routeTree.gen.ts (1 hunks)
• e2e/react-start/server-routes/src/routeTree.gen.ts (1 hunks)
• e2e/react-start/spa-mode/src/routeTree.gen.ts (1 hunks)
• e2e/react-start/virtual-routes/src/routeTree.gen.ts (1 hunks)
• e2e/react-start/website/src/routeTree.gen.ts (1 hunks)
• e2e/solid-start/basic-tsr-config/src/app/routeTree.gen.ts (1 hunks)
• e2e/solid-start/basic/src/routeTree.gen.ts (1 hunks)
• e2e/solid-start/custom-basepath/src/routeTree.gen.ts (1 hunks)
• e2e/solid-start/scroll-restoration/src/routeTree.gen.ts (1 hunks)
• e2e/solid-start/selective-ssr/src/routeTree.gen.ts (1 hunks)
• e2e/solid-start/server-functions/src/routeTree.gen.ts (1 hunks)
• e2e/solid-start/server-routes/src/routeTree.gen.ts (1 hunks)
• e2e/solid-start/spa-mode/src/routeTree.gen.ts (1 hunks)
• e2e/solid-start/website/src/routeTree.gen.ts (1 hunks)
• examples/react/start-bare/src/routeTree.gen.ts (1 hunks)
• examples/react/start-basic-auth/src/routeTree.gen.ts (1 hunks)
• examples/react/start-basic-react-query/src/routeTree.gen.ts (1 hunks)
• examples/react/start-basic-static/src/routeTree.gen.ts (1 hunks)
• examples/react/start-basic/src/routeTree.gen.ts (1 hunks)
• examples/react/start-convex-trellaux/src/routeTree.gen.ts (1 hunks)
• examples/react/start-counter/src/routeTree.gen.ts (1 hunks)
• examples/react/start-large/src/routeTree.gen.ts (1 hunks)
• examples/react/start-material-ui/src/routeTree.gen.ts (1 hunks)
• examples/react/start-supabase-basic/src/routeTree.gen.ts (1 hunks)
• examples/react/start-tailwind-v4/src/routeTree.gen.ts (1 hunks)
• examples/react/start-trellaux/src/routeTree.gen.ts (1 hunks)
• examples/react/start-workos/src/routeTree.gen.ts (1 hunks)
• examples/solid/start-bare/src/routeTree.gen.ts (1 hunks)
• examples/solid/start-basic-static/src/routeTree.gen.ts (1 hunks)
• examples/solid/start-basic/src/routeTree.gen.ts (1 hunks)
• packages/router-core/src/router.ts (1 hunks)
• packages/router-core/src/ssr/serializer/transformer.ts (2 hunks)
• packages/start-plugin-core/src/start-router-plugin/plugin.ts (1 hunks)

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☁️ Nx Cloud last updated this comment at 2025-09-25 15:27:51 UTC

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commit: 91ccee2