fix(start): explicitly re-export public API to survive SSR cold-start cycle

[schiller-manuel]

see #7459

Summary by CodeRabbit

• Bug Fixes
  • Fixed an issue where certain public API functions were unavailable during server-side rendering and link-time execution in React Start, Solid Start, and Vue Start. These packages now properly expose all public functions from the core library throughout the complete application lifecycle.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: af2e48fd-24cf-47b4-891e-3dc3a8df1b78

📥 Commits

Reviewing files that changed from the base of the PR and between e2896b5 and f3d8afb.

📒 Files selected for processing (4)

• .changeset/trim-start-meta-reexports.md
• packages/react-start/src/index.ts
• packages/solid-start/src/index.ts
• packages/vue-start/src/index.ts

---

📝 Walkthrough

Walkthrough

This PR adds explicit named re-exports from @tanstack/start-client-core to three framework-specific start packages (React, Solid, Vue) alongside existing barrel exports. These explicit re-exports ensure public API names are registered on the namespace at link time and persist through SSR cold-start cycles, resolving runtime availability issues.

Changes

SSR Namespace Visibility Fix

Layer / File(s)	Summary
Changeset documentation .changeset/trim-start-meta-reexports.md	Documents patch-level version bumps and explains that explicit re-exports of selected public API names from @tanstack/start-client-core are now added to react-start, solid-start, and vue-start to fix SSR namespace visibility.
Framework-specific re-exports packages/react-start/src/index.ts, packages/solid-start/src/index.ts, packages/vue-start/src/index.ts	Explicit named re-exports of createClientOnlyFn, createCsrfMiddleware, createIsomorphicFn, createMiddleware, createServerFn, createServerOnlyFn, and createStart added to each package's index to ensure these API names are registered at link time and accessible throughout the SSR execution cycle.

🎯 2 (Simple) | ⏱️ ~10 minutes

🐰 With re-exports now in place so bright,
The SSR cold-start sees functions alight,
No more missing middleware at runtime's dawn,
Three frameworks together, the facade lives on! ✨

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the main change: explicitly re-exporting public APIs to fix SSR cold-start issues, which aligns with all file changes across react-start, solid-start, and vue-start packages.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch reexport-vite-workaround

---

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[github-actions]

Bundle Size Benchmarks

• Commit: 033682b2d6e5
• Measured at: 2026-05-21T20:34:05.174Z
• Baseline source: history:65b4abe65bc2
• Dashboard: bundle-size history

Scenario	Current (gzip)	Delta vs baseline	Initial gzip	Raw	Brotli	Trend
react-router.minimal	87.30 KiB	0 B (0.00%)	87.16 KiB	274.02 KiB	75.93 KiB	███████▁▁▁▁
react-router.full	90.82 KiB	0 B (0.00%)	90.68 KiB	285.51 KiB	78.89 KiB	▆▆▆▆▆▆█▁▁▁▁
solid-router.minimal	35.53 KiB	0 B (0.00%)	35.41 KiB	106.33 KiB	31.98 KiB	▅▅▅████▁▁▁▁
solid-router.full	40.27 KiB	0 B (0.00%)	40.15 KiB	120.52 KiB	36.23 KiB	▁▁▁▂▂▂▅████
vue-router.minimal	53.32 KiB	0 B (0.00%)	53.20 KiB	151.46 KiB	47.92 KiB	██████▁▆▆▆▆
vue-router.full	58.45 KiB	0 B (0.00%)	58.32 KiB	167.62 KiB	52.37 KiB	██████▁████
react-start.minimal	102.02 KiB	0 B (0.00%)	101.89 KiB	322.47 KiB	88.26 KiB	▁▁▁▅▅▅▄████
react-start.deferred-hydration	103.07 KiB	0 B (0.00%)	102.19 KiB	324.11 KiB	89.26 KiB	████▁▁▁▁
react-start.full	105.42 KiB	0 B (0.00%)	105.28 KiB	332.78 KiB	91.04 KiB	▆▆▆████▁▁▁▁
react-start.rsbuild.minimal	99.64 KiB	0 B (0.00%)	99.46 KiB	316.93 KiB	85.78 KiB	▆▆▆▆▆▆▁████
react-start.rsbuild.full	102.93 KiB	0 B (0.00%)	102.76 KiB	327.34 KiB	88.52 KiB	██████▁▃▃▃▃
solid-start.minimal	49.67 KiB	0 B (0.00%)	49.54 KiB	152.45 KiB	43.83 KiB	▁▁▁███▇▄▄▄▄
solid-start.deferred-hydration	53.74 KiB	0 B (0.00%)	50.40 KiB	160.99 KiB	47.75 KiB	███▇▁▁▁▁
solid-start.full	55.46 KiB	0 B (0.00%)	55.33 KiB	169.34 KiB	48.83 KiB	▁▁▁███▆▆▆▆▆

Current gzip tracks all emitted client JS chunks. Initial gzip tracks only the entry/import graph. Trend sparkline is historical current gzip ending with this PR measurement; lower is better.

[nx-cloud]

View your CI Pipeline Execution ↗ for commit f3d8afb

Command	Status	Duration	Result
nx affected --targets=test:eslint,test:unit,tes...	✅ Succeeded	10m 3s	View ↗
nx run-many --target=build --exclude=examples/*...	✅ Succeeded	2m 15s	View ↗

---

☁️ Nx Cloud last updated this comment at 2026-05-21 20:50:34 UTC

[github-actions]

🚀 Changeset Version Preview

3 package(s) bumped directly, 0 bumped as dependents.

🟩 Patch bumps

Package	Version	Reason
@tanstack/react-start	1.168.9 → 1.168.10	Changeset
@tanstack/solid-start	1.168.9 → 1.168.10	Changeset
@tanstack/vue-start	1.168.9 → 1.168.10	Changeset

[pkg-pr-new]

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commit: f3d8afb

[codspeed-hq]

Merging this PR will not alter performance

✅ 5 untouched benchmarks
⏩ 1 skipped benchmark¹

---

_{Comparing reexport-vite-workaround (f3d8afb) with main (65b4abe)²}

Footnotes

1. 1 benchmark was skipped, so the baseline result was used instead. If it was deleted from the codebase, click here and archive it to remove it from the performance reports. ↩

2. No successful run was found on main (e2896b5) during the generation of this report, so 65b4abe was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩