chore: cleanup unused exports

[schiller-manuel]

Summary by CodeRabbit

Release Notes

• Refactor
  • Removed unused internal utilities and hooks from router implementations.
  • Streamlined public API exports across packages by removing deprecated symbols and consolidating unnecessary re-exports.
  • Optimized bundle size through elimination of empty hooks and unused helper functions.
  • Reduced public surface area for cleaner and more maintainable interfaces.

[coderabbitai]

📝 Walkthrough

Walkthrough

This PR removes several public API exports across the TanStack Router packages, including TSR_DEFERRED_PROMISE, defaultSerializeError, matchContext, useLayoutEffect utilities, and various helpers like componentTypes and headersInitToObject. The public API surface is narrowed across react-router, solid-router, vue-router, and router-core packages, along with cleanup in e2e bundle-size test scenarios.

Changes

Cohort / File(s)	Summary
E2E Bundle-Size Scenario Cleanup e2e/bundle-size/scenarios/react-router-full/src/routes/__root.tsx, e2e/bundle-size/scenarios/react-start-full/src/routes/__root.tsx, e2e/bundle-size/scenarios/solid-router-full/src/routes/__root.tsx, e2e/bundle-size/scenarios/solid-start-full/src/routes/__root.tsx, e2e/bundle-size/scenarios/vue-router-full/src/routes/__root.tsx	Removed useLayoutEffect and useStableCallback imports, calls, and references from test scenario components; eliminates unused hook invocations.
React Router Public Exports packages/react-router/src/index.tsx	Removed public exports: TSR_DEFERRED_PROMISE, defaultSerializeError, matchContext, useLayoutEffect; narrowed @tanstack/router-core re-exports to only lazyFn and SearchParamError.
Solid Router Public Exports packages/solid-router/src/index.tsx	Removed public exports: TSR_DEFERRED_PROMISE, defaultSerializeError, matchContext, useLayoutEffect; narrowed @tanstack/router-core re-exports to only lazyFn and SearchParamError.
Solid Router Utils packages/solid-router/src/utils.ts	Removed exported useLayoutEffect utility function that mapped to Solid.createRenderEffect or Solid.createEffect.
Vue Router Public Exports packages/vue-router/src/index.tsx	Removed public exports: TSR_DEFERRED_PROMISE, defaultSerializeError, matchContext, useLayoutEffect; replaced multi-line @tanstack/router-core re-exports with single export of lazyFn and SearchParamError.
Router Core Public Exports packages/router-core/src/index.ts	Removed exports: componentTypes, last, decodePath, RawStreamSSRPlugin; updated rewrite exports to remove executeRewriteOutput.
Router Core SSR Headers packages/router-core/src/ssr/client.ts, packages/router-core/src/ssr/headers.ts	Removed headersInitToObject utility function and its re-export from client module; eliminates HeadersInit conversion helper.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

Possibly related PRs

• #5587: Directly inverse relationship—that PR adds/documents symbols like TSR_DEFERRED_PROMISE and defaultSerializeError that this PR removes from the public API.
• #6514: Related SSR headers refactoring—both PRs modify router-core header utilities, with this PR removing headersInitToObject while the other refactors mergeHeaders and type definitions.

Suggested labels

package: react-router, package: router-core, package: solid-router, package: vue-router

Suggested reviewers

• nlynzaad

Poem

🐰 The exports shrink with gentle care,
Old hooks and helpers fade away,
A leaner API breathes the air,
The public surface, sleek to stay! ✨

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title 'chore: cleanup unused exports' accurately summarizes the main change—removing unused exports across multiple packages and e2e scenarios.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

• 📝 Generate docstrings (stacked PR)
• 📝 Generate docstrings (commit on current branch)

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch clean-exports

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[nx-cloud]

View your CI Pipeline Execution ↗ for commit 02dda60

Command	Status	Duration	Result
nx run tanstack-router-e2e-bundle-size:build --...	✅ Succeeded	1m 27s	View ↗

---

☁️ Nx Cloud last updated this comment at 2026-02-22 23:11:13 UTC

[github-actions]

Bundle Size Benchmarks

• Commit: 217cda0288cf
• Measured at: 2026-02-22T22:54:50.559Z
• Baseline source: history:eeb8c5594b3c
• Dashboard: bundle-size history

Scenario	Current (gzip)	Delta vs baseline	Raw	Brotli	Trend
react-router.minimal	86.72 KiB	0 B (0.00%)	272.45 KiB	75.31 KiB	▅▅▅▅▅██▁
react-router.full	89.75 KiB	-42 B (-0.05%)	282.78 KiB	78.01 KiB	███████▄▁
solid-router.minimal	35.98 KiB	-8 B (-0.02%)	107.59 KiB	32.28 KiB	█████▆▆▂▁
solid-router.full	40.31 KiB	-24 B (-0.06%)	120.64 KiB	36.15 KiB	█████▇▇▃▁
vue-router.minimal	51.82 KiB	-8 B (-0.02%)	147.59 KiB	46.58 KiB	█████▆▆▂▁
vue-router.full	56.67 KiB	-22 B (-0.04%)	163.18 KiB	50.90 KiB	█████▆▆▃▁
react-start.minimal	99.22 KiB	0 B (0.00%)	311.44 KiB	85.84 KiB	▇▇▇▇▇██▁
react-start.full	102.54 KiB	-51 B (-0.05%)	321.22 KiB	88.64 KiB	███████▄▁
solid-start.minimal	48.22 KiB	-6 B (-0.01%)	145.02 KiB	42.67 KiB	█████▇▇▂▁
solid-start.full	53.69 KiB	-20 B (-0.04%)	160.93 KiB	47.29 KiB	█████▇▇▃▁

Trend sparkline is historical gzip bytes ending with this PR measurement; lower is better.

[pkg-pr-new]

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commit: 02dda60

[coderabbitai]

🧹 Nitpick comments (1)

packages/router-core/src/index.ts (1)

448-448: Public API trim — please ensure release notes/migration mention executeRewriteOutput removal.

🤖 Prompt for AI Agents

Verify each finding against the current code and only fix it if needed.
In `@packages/router-core/src/index.ts` at line 448, The public export currently
re-exports composeRewrites and executeRewriteInput but the review notes that
executeRewriteOutput was removed from the public API; update the package's
public API surface to reflect this change by removing any remaining re-exports
or references to executeRewriteOutput (check files/exports referencing
executeRewriteOutput and the export statement that includes
composeRewrites/executeRewriteInput), and add a brief migration note in the
release notes explaining that executeRewriteOutput was removed and how consumers
should migrate (e.g., use executeRewriteInput or composeRewrites instead).

🤖 Prompt for all review comments with AI agents

Verify each finding against the current code and only fix it if needed.
Nitpick comments:
In `@packages/router-core/src/index.ts`:
- Line 448: The public export currently re-exports composeRewrites and
executeRewriteInput but the review notes that executeRewriteOutput was removed
from the public API; update the package's public API surface to reflect this
change by removing any remaining re-exports or references to
executeRewriteOutput (check files/exports referencing executeRewriteOutput and
the export statement that includes composeRewrites/executeRewriteInput), and add
a brief migration note in the release notes explaining that executeRewriteOutput
was removed and how consumers should migrate (e.g., use executeRewriteInput or
composeRewrites instead).