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schiller-manuel · 2026-10-10T09:16:45Z

🎯 Changes

Upgrade @tanstack/react-store from ^0.11.2 to ^1.0.0-alpha.0, using React's native useSyncExternalStore and removing the shim dependency. The core Store version remains 0.11.2.

Add public-hook coverage for allocating selectors whose captured props change without navigation, a React Router patch changeset, and the maintainer-approved release-age exception scoped to this alpha version.

Memory investigation confirmed an upstream alpha retention bug: after 30,000 navigations, 30,001 old locations and loader payloads remain reachable while mounted. TanStack/store #390 fixes the shared selector/subscription closure lifetime and includes a patch changeset. The packed, minified fix retains only two locations and one payload and passes Router/Start integration checks. The lockfile in this PR still uses the affected alpha; update it to the fixed release before merging.

Alpha also exposes a missing React Server Component client boundary. TanStack/store #391 marks the React hook/context leaves as client modules while preserving server-callable core exports, with a patch changeset. The final packed fix passes all 50 Router/Start validation tasks, both Vite/Rsbuild production RSC builds, and the complete Rsbuild RSC browser suite (258 passed, one skipped). Across all 18 bundle scenarios, raw sizes and chunk counts are unchanged; gzip is unchanged in 17 scenarios and up one byte for Rsbuild IIFE. Update this PR to a release containing both upstream fixes before merging.

Authored with Codex.

✅ Checklist

Maintainer-requested dependency update; contributor onboarding skipped.
Reviewed the final diff and dependency API compatibility.
Passed available unit, TypeScript matrix, eslint, and package-build checks for React Router and six affected React consumers.
Passed 206 Router browser tests and 20 Start SSR browser tests covering hydration, navigation, search, and streaming.
Completed the full 18-scenario bundle comparison and source attribution: all React fixtures shrink by 383–408 gzip bytes; Solid/Vue fixtures are byte-identical. Router minimal shrinks by 405 gzip bytes.
Compared the same selector-heavy navigation workload in two alternating fresh-process pairs. Runtime deltas (+2.06%, -0.48%) are inconclusive; no speedup claim.

🚀 Release Impact

Published dependency change with a patch changeset for @tanstack/react-router; Changesets confirms the release plan.

Summary by CodeRabbit

Bug Fixes
- Location and router-state selectors now update displayed values when component props change, even without navigation, while preserving router state.
Chores
- Updated the router’s React Store dependency to a newer alpha release.

changeset-bot · 2026-10-10T09:16:50Z

coderabbitai · 2026-10-10T09:17:36Z

📝 Walkthrough

Walkthrough

The router package now depends on @tanstack/react-store ^1.0.0-alpha.0. The workspace excludes this version from the minimum release age check. A test checks selector output after a prop change without navigation.

Changes

React Store dependency and release configuration

Layer / File(s)	Summary
React Store dependency and release configuration `packages/react-router/package.json`, `.changeset/wide-shoes-invite.md`, `pnpm-workspace.yaml`	The router dependency range changes to `^1.0.0-alpha.0`. The changeset records a router patch release and describes the store upgrade. The workspace excludes this version from the minimum release age check.

Selector updates after a prop change

Layer / File(s)	Summary
Selector updates after a prop change `packages/react-router/tests/useLocation.test.tsx`	A test changes a captured prop without navigation and checks that both selector labels update while the router state object retains the same reference.

Priority: ⬇️ Low

Estimated code review effort: 2 (Simple) | ~10 minutes

Change: Other

Suggested reviewers: sheraff

Merge Risk: 🟡 Moderate · up to de0da

React 18 users may be unable to install the router with the new dependency. Resolve the peer-version mismatch before merging.

Pre-merge checks | 4 | 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage		Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 1 functions across 1 files. (3 skipped: 3 …	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Linked Issues check		Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check		Check skipped because no linked issues were found for this pull request.
Title check		The title clearly and concisely identifies the main change: upgrading react-store for React Router.
Description check		The description includes the required Changes, Checklist, and Release Impact sections. It explains the dependency update, tests, release changeset, AI authorship, and known upstream alpha issues. The …

Full details: Docstring Coverage

Explanation

Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 1 functions across 1 files. (3 skipped: 3 unsupported.)

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socket-security · 2026-10-10T09:18:09Z

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	@tanstack/react-store@0.11.2 ⏵ 1.0.0-alpha.0	⁺¹		⁺¹	⁺⁴

View full report

github-actions · 2026-10-10T09:18:38Z

🚀 Changeset Version Preview

1 package(s) bumped directly, 4 bumped as dependents.

🟩 Patch bumps

Package	Version	Reason
`@tanstack/react-router`	1.170.42 → 1.170.43	Changeset
`@tanstack/react-start`	1.168.61 → 1.168.62	Dependent
`@tanstack/react-start-client`	1.168.40 → 1.168.41	Dependent
`@tanstack/react-start-rsc`	0.1.60 → 0.1.61	Dependent
`@tanstack/react-start-server`	1.167.47 → 1.167.48	Dependent

chatgpt-codex-connector · 2026-10-10T09:19:42Z

Codex Review Summary

This comment shows the latest Codex review activity on this pull request.

Review	Status	Commit	Review trigger
🔒 Security Review	✅ Completed 2026-10-10T09:19:39.723788Z	`de0daab`	PR opened

ℹ️ About Codex in GitHub

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Mark a draft as ready
Comment "@codex review" or "@codex security review".

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nx-cloud · 2026-10-10T09:19:42Z

View your CI Pipeline Execution ↗ for commit de0daab

Command	Status	Duration	Result
`nx affected --targets=test:eslint,test:unit,tes...`	❌ Failed	9m 27s	View ↗
`nx run-many --target=build --exclude=examples/*...`	✅ Succeeded	2m 6s	View ↗

☁️ Nx Cloud last updated this comment at 2026-10-10 09:30:33 UTC

github-actions · 2026-10-10T09:21:21Z

Bundle Size Benchmarks

Commit: 131a42c29666
Measured at: 2026-10-10T09:19:40.942Z
Baseline source: history:c79c620bf479
Dashboard: bundle-size history

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

Scenario	Current (gzip)	Initial (gzip)	Raw	Brotli	Trend
`react-router.minimal`	83.6 KiB -405 B	83.5 KiB -405 B	260.2 KiB -1.2 KiB	72.9 KiB -378 B	▇▇▇▇▇▇▇▅▇██▁
`react-router.full`	87.2 KiB -383 B	87.1 KiB -382 B	272.1 KiB -1.2 KiB	76.1 KiB -348 B	▇▇▇▇▇▇▇▇▇██▁
`react-start.minimal`	96.4 KiB -404 B	96.2 KiB -400 B	301.1 KiB -1.2 KiB	83.8 KiB -288 B	██████▇▇▇██▁
`react-start.query-integration`	103.8 KiB -408 B	103.6 KiB -407 B	327.7 KiB -1.2 KiB	90.1 KiB -332 B	██████▇▇▇██▁
`react-start.deferred-hydration`	97.1 KiB -401 B	96.3 KiB -401 B	302.5 KiB -1.2 KiB	84.4 KiB -333 B	██████▇▇▇██▁
`react-start.full`	99.6 KiB -384 B	99.4 KiB -384 B	310.9 KiB -1.2 KiB	86.4 KiB -331 B	██████▇▇▇██▁
`react-start.rsbuild.minimal`	99.9 KiB -389 B	99.8 KiB -389 B	312.0 KiB -1.2 KiB	86.3 KiB -321 B	██████▇▇▇▇▇▁
`react-start.rsbuild.minimal-iife`	100.4 KiB -381 B	100.2 KiB -381 B	313.0 KiB -1.2 KiB	86.7 KiB -314 B	██████▇▇▇▇▇▁
`react-start.rsbuild.full`	103.2 KiB -383 B	103.0 KiB -383 B	322.1 KiB -1.2 KiB	89.1 KiB -386 B	██████▇▇▇▇▇▁

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 · 2026-10-10T09:24:10Z

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commit: de0daab

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Actionable comments posted: 1

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Inline comments:
Review comments at @packages/react-router/package.json:
- Line 96: Update the @tanstack/react-store dependency in the package manifest
to a release whose React and React DOM peer ranges include React 18; retain
0.11.2 if no compatible alpha release is available.

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⛔ Files ignored due to path filters (1)

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

📒 Files selected for processing (4)

.changeset/wide-shoes-invite.md
packages/react-router/package.json
packages/react-router/tests/useLocation.test.tsx
pnpm-workspace.yaml

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codspeed · 2026-10-10T09:39:14Z

Merging this PR will regress 1 benchmark

ℹ️ 99 benchmarks have no flame graph

The flamegraph could not be generated because too much time was spent in runtime internals, making the visualization not useful for performance analysis.

ssr head (vue)

ssr server-fn multipart (react)

ssr global-mw document (react)

ssr control-flow route headers (react)

ssr control-flow unmatched 404 (react)

ssr global-mw server-route 0 middleware (react)

ssr control-flow error 500 (react)

ssr rewrite passthrough (vue)

ssr global-mw server-route 2 middlewares (react)

ssr control-flow error 500 (vue)

…and 89 more

⚠️

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
❌ 1 regressed benchmark
✅ 186 untouched benchmarks
⏩ 3 skipped benchmarks¹

Warning

Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

Tip

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

_{Comparing codex/bump-react-store-alpha (de0daab) with main (c79c620)}

3 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩

schiller-manuel added 2 commits October 10, 2026 11:02

test(react-router): cover selector changes without navigation

ecaca08

chore(react-router): bump react-store to 1.0.0-alpha.0

de0daab

github-actions Bot added the package: react-router label Oct 10, 2026

coderabbitai Bot reviewed Oct 10, 2026

View reviewed changes

Comment thread packages/react-router/package.json

This was referenced Oct 10, 2026

feat!: bring alpha updates and selector retention fixes to main TanStack/store#390

Open

fix(react-store): preserve RSC client boundaries TanStack/store#391

Merged

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