chore: update seroval to 1.6.2

[Sheraff]

Summary

• update seroval and seroval-plugins to 1.6.2 across the affected Router and Start packages
• update the SSR benchmark dependency and refresh the pnpm lockfile
• add patch changesets for the five affected public packages

Why

This adopts the latest Seroval serialization fixes, Temporal support, constructor serialization compatibility, restored CJS/ESM builds, and Promise-deserialization validation. The upstream changelog and published package diff did not show an API migration requirement.

Validation

• CI=1 NX_DAEMON=false pnpm nx run-many --target=test:unit --projects=@tanstack/router-core,@tanstack/start-client-core,@tanstack/start-server-core,@tanstack/start-static-server-functions,@tanstack/start-plugin-core --outputStyle=stream --skipRemoteCache
• CI=1 NX_DAEMON=false pnpm nx run-many --target=test:types --projects=@tanstack/router-core,@tanstack/start-client-core,@tanstack/start-server-core,@tanstack/start-static-server-functions,@tanstack/start-plugin-core --outputStyle=stream --skipRemoteCache
• pnpm exec changeset status
• CommonJS and ESM import smoke tests for seroval and seroval-plugins/web
• git diff --check

Summary by CodeRabbit

• Chores

  • Updated serialization dependencies to version 1.6.2 across supported packages and SSR benchmarks.

• Release

  • Prepared patch releases for six packages to incorporate the dependency updates.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: 16d624a6-2fe6-44c3-a51b-17d80736d8a6

📥 Commits

Reviewing files that changed from the base of the PR and between 314098e and 8bdd62e.

⛔ Files ignored due to path filters (1)

• pnpm-lock.yaml is excluded by !**/pnpm-lock.yaml

📒 Files selected for processing (7)

• .changeset/wise-ducks-serialize.md
• benchmarks/ssr/package.json
• packages/router-core/package.json
• packages/start-client-core/package.json
• packages/start-plugin-core/package.json
• packages/start-server-core/package.json
• packages/start-static-server-functions/package.json

---

📝 Walkthrough

Walkthrough

The pull request updates Seroval dependencies from ^1.5.4 to ^1.6.2 across the SSR benchmark and five packages. It adds a Changeset for patch releases of six TanStack packages.

Changes

Seroval dependency update

Layer / File(s)	Summary
Dependency constraints and patch releases benchmarks/ssr/package.json, packages/router-core/package.json, packages/start-*/package.json, packages/start-static-server-functions/package.json, .changeset/wise-ducks-serialize.md	Updates seroval and seroval-plugins constraints to ^1.6.2. Adds patch release metadata for six packages.

Estimated code review effort: 1 (Trivial) | ~5 minutes

Suggested reviewers: schiller-manuel

🚥 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 identifies the main change: updating Seroval to version 1.6.2.
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.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch codex/update-seroval-1-6-2

---

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[nx-cloud]

View your CI Pipeline Execution ↗ for commit 8bdd62e

Command	Status	Duration	Result
nx affected --targets=test:eslint,test:unit,tes...	✅ Succeeded	11m 23s	View ↗
nx run-many --target=build --exclude=examples/*...	✅ Succeeded	1m 41s	View ↗

---

☁️ Nx Cloud last updated this comment at 2026-08-05 10:06:18 UTC

[github-actions]

🚀 Changeset Version Preview

5 package(s) bumped directly, 18 bumped as dependents.

🟩 Patch bumps

Package	Version	Reason
@tanstack/router-core	1.171.16 → 1.171.17	Changeset
@tanstack/start-client-core	1.170.15 → 1.170.16	Changeset
@tanstack/start-plugin-core	1.171.27 → 1.171.28	Changeset
@tanstack/start-server-core	1.169.19 → 1.169.20	Changeset
@tanstack/start-static-server-functions	1.167.20 → 1.167.21	Changeset
@tanstack/react-router	1.170.19 → 1.170.20	Dependent
@tanstack/react-start	1.168.36 → 1.168.37	Dependent
@tanstack/react-start-client	1.168.17 → 1.168.18	Dependent
@tanstack/react-start-rsc	0.1.35 → 0.1.36	Dependent
@tanstack/react-start-server	1.167.24 → 1.167.25	Dependent
@tanstack/router-cli	1.167.22 → 1.167.23	Dependent
@tanstack/router-generator	1.167.22 → 1.167.23	Dependent
@tanstack/router-plugin	1.168.24 → 1.168.25	Dependent
@tanstack/router-vite-plugin	1.167.24 → 1.167.25	Dependent
@tanstack/solid-router	1.170.19 → 1.170.20	Dependent
@tanstack/solid-start	1.168.35 → 1.168.36	Dependent
@tanstack/solid-start-client	1.168.17 → 1.168.18	Dependent
@tanstack/solid-start-server	1.167.24 → 1.167.25	Dependent
@tanstack/start-storage-context	1.167.18 → 1.167.19	Dependent
@tanstack/vue-router	1.170.18 → 1.170.19	Dependent
@tanstack/vue-start	1.168.34 → 1.168.35	Dependent
@tanstack/vue-start-client	1.167.20 → 1.167.21	Dependent
@tanstack/vue-start-server	1.167.24 → 1.167.25	Dependent

[github-actions]

Bundle Size Benchmarks

• Commit: d4a3daffded0
• Measured at: 2026-08-05T09:56:00.954Z
• Baseline source: history:704145c6d5f1
• Dashboard: bundle-size history

The following scenarios have bundle-size changes compared with the baseline:

Scenario	Current (gzip)	Delta vs baseline	Initial gzip	Raw	Brotli	Trend
react-start.minimal	100.62 KiB	-1.38 KiB (-1.35%)	100.48 KiB	312.43 KiB	87.33 KiB	███████████▁
react-start.deferred-hydration	101.36 KiB	-1.38 KiB (-1.34%)	100.51 KiB	313.80 KiB	88.07 KiB	███████████▁
react-start.full	103.95 KiB	-1.46 KiB (-1.39%)	103.81 KiB	322.43 KiB	90.24 KiB	███████████▁
react-start.rsbuild.minimal	100.24 KiB	+463 B (+0.45%)	100.07 KiB	316.94 KiB	86.49 KiB	▁▁▁▁▁▁▁▁▂▂▂█
react-start.rsbuild.minimal-iife	100.65 KiB	+474 B (+0.46%)	100.49 KiB	317.87 KiB	86.75 KiB	▁▁▁▁▁▁▁▁▂▂▂█
react-start.rsbuild.full	103.59 KiB	+478 B (+0.45%)	103.42 KiB	327.08 KiB	89.12 KiB	▁▁▁▁▁▁▁▁▃▃▃█
solid-start.minimal	48.22 KiB	-1.44 KiB (-2.91%)	48.09 KiB	142.28 KiB	42.86 KiB	███████████▁
solid-start.deferred-hydration	51.48 KiB	-1.45 KiB (-2.74%)	48.15 KiB	150.32 KiB	45.82 KiB	███████████▁
solid-start.full	53.48 KiB	-1.47 KiB (-2.67%)	53.35 KiB	158.06 KiB	47.56 KiB	████████▆▆▆▁
vue-start.minimal	69.02 KiB	-1.44 KiB (-2.05%)	68.89 KiB	195.29 KiB	61.38 KiB	████████▆▆▆▁
vue-start.full	72.99 KiB	-1.44 KiB (-1.93%)	72.86 KiB	207.90 KiB	64.79 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.

[pkg-pr-new]

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commit: 8bdd62e

[codspeed-hq]

Merging this PR will regress 13 benchmarks

⚠️ Different runtime environments detected

Some benchmarks with significant performance changes were compared across different runtime environments,
which may affect the accuracy of the results.

Open the report in CodSpeed to investigate

⚡ 7 improved benchmarks
❌ 13 regressed benchmarks
✅ 160 untouched benchmarks

Warning

Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
❌	Memory	mem server error-paths not-found (vue)	320.7 KB	421.4 KB	-23.91%
❌	Memory	mem server error-paths unmatched (react)	264 KB	304.9 KB	-13.43%
❌	Memory	mem client navigation-churn (solid)	535.3 KB	605 KB	-11.53%
❌	Memory	mem server error-paths redirect (react)	189.1 KB	213.3 KB	-11.36%
❌	Simulation	ssr server-fn not-found (solid)	61.8 ms	69.6 ms	-11.21%
❌	Simulation	ssr server-fn POST (solid)	64.7 ms	70.7 ms	-8.46%
❌	Simulation	ssr server-fn during document ssr (react)	62.7 ms	68.3 ms	-8.34%
❌	Simulation	ssr server-fn redirect (solid)	52.4 ms	56.3 ms	-6.91%
❌	Simulation	ssr server-fn send-context (solid)	65.9 ms	70.5 ms	-6.49%
❌	Simulation	ssr server-fn GET (solid)	71.4 ms	75 ms	-4.7%
❌	Simulation	ssr global-mw server-fn (solid)	57.4 ms	60.2 ms	-4.62%
❌	Simulation	client-rewrites navigation loop (solid)	81.5 ms	84.3 ms	-3.4%
❌	Memory	mem server aborted-requests (solid)	911.8 KB	940.5 KB	-3.06%
⚡	Memory	mem client unique-location-churn (solid)	550.4 KB	342.3 KB	+60.8%
⚡	Memory	mem server peak-large-page (solid)	1,205.8 KB	842.5 KB	+43.12%
⚡	Memory	mem server error-paths redirect (vue)	407.2 KB	304.5 KB	+33.7%
⚡	Memory	mem server error-paths not-found (solid)	495.2 KB	422.9 KB	+17.11%
⚡	Simulation	ssr request loop (solid)	159 ms	147.1 ms	+8.07%
⚡	Simulation	ssr assets linked-css control (vue)	194.3 ms	187.7 ms	+3.5%
⚡	Simulation	client-nested-params navigation loop (solid)	265 ms	257.2 ms	+3.05%

Tip

Investigate this regression by commenting @codspeedbot fix this regression on this PR, or directly use the CodSpeed MCP with your agent.

---

_{Comparing codex/update-seroval-1-6-2 (8bdd62e) with main (704145c)¹}

Footnotes

1. No successful run was found on main (314098e) during the generation of this report, so 704145c was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩