Release: Prerelease 10.2.0-alpha.9

[github-actions]

This is an automated pull request that bumps the version from 10.2.0-alpha.8 to 10.2.0-alpha.9.
Once this pull request is merged, it will trigger a new release of version 10.2.0-alpha.9.
If you're not a core maintainer with permissions to release you can ignore this pull request.

To do

Before merging the PR, there are a few QA steps to go through:

• Add the "freeze" label to this PR, to ensure it doesn't get automatically forced pushed by new changes.
• Add the "ci:daily" label to this PR, to trigger the full test suite to run on this PR.

And for each change below:

1. Ensure the change is appropriate for the version bump. E.g. patch release should only contain patches, not new or de-stabilizing features. If a change is not appropriate, revert the PR.
2. Ensure the PR is labeled correctly with one of: "BREAKING CHANGE", "feature request", "bug", "maintenance", "dependencies", "documentation", "build", "unknown".
3. Ensure the PR title is correct, and follows the format "[Area]: [Summary]", e.g. "React: Fix hooks in CSF3 render functions". If it is not correct, change the title in the PR.
   • Areas include: React, Vue, Core, Docs, Controls, etc.
   • First word of summary indicates the type: “Add”, “Fix”, “Upgrade”, etc.
   • The entire title should fit on a line

This is a list of all the PRs merged and commits pushed directly to next, that will be part of this release:

• ✨ Feature Request: Core and Vite: Use story index as source of truth for Vite paths #30612

If you've made any changes doing the above QA (change PR titles, revert PRs), manually trigger a re-generation of this PR with this workflow and wait for it to finish. It will wipe your progress in this to do, which is expected.

Feel free to manually commit any changes necessary to this branch after you've done the last re-generation, following the Make Manual Changes section in the docs, especially if you're making changes to the changelog.

When everything above is done:

• Merge this PR
• Follow the run of the publish action

---

Generated changelog

10.2.0-alpha.9

• Core and Vite: Use story index as source of truth for Vite paths - #30612, thanks JReinhold!

[storybook-app-bot]

Package Benchmarks

^{Commit: 33940b9, ran on 19 December 2025 at 11:27:35 UTC}

The following packages have significant changes to their size or dependencies:

@storybook/builder-vite

	Before	After	Difference
Dependency count	17	17	0
Self size	325 KB	125 KB	🎉 -200 KB 🎉
Dependency size	2.00 MB	2.00 MB	0 B
Bundle Size Analyzer	Link	Link

@storybook/builder-webpack5

	Before	After	Difference
Dependency count	192	192	0
Self size	75 KB	75 KB	🚨 +96 B 🚨
Dependency size	32.16 MB	32.17 MB	🚨 +12 KB 🚨
Bundle Size Analyzer	Link	Link

@storybook/angular

	Before	After	Difference
Dependency count	192	192	0
Self size	118 KB	118 KB	0 B
Dependency size	30.39 MB	30.40 MB	🚨 +13 KB 🚨
Bundle Size Analyzer	Link	Link

@storybook/ember

	Before	After	Difference
Dependency count	196	196	0
Self size	15 KB	15 KB	🚨 +36 B 🚨
Dependency size	28.88 MB	28.89 MB	🚨 +13 KB 🚨
Bundle Size Analyzer	Link	Link

@storybook/html-vite

	Before	After	Difference
Dependency count	20	20	0
Self size	22 KB	22 KB	🎉 -24 B 🎉
Dependency size	2.36 MB	2.16 MB	🎉 -200 KB 🎉
Bundle Size Analyzer	Link	Link

@storybook/nextjs

	Before	After	Difference
Dependency count	538	538	0
Self size	646 KB	646 KB	🚨 +120 B 🚨
Dependency size	59.10 MB	59.11 MB	🚨 +13 KB 🚨
Bundle Size Analyzer	Link	Link

@storybook/nextjs-vite

	Before	After	Difference
Dependency count	127	127	0
Self size	1.12 MB	1.12 MB	0 B
Dependency size	21.97 MB	21.78 MB	🎉 -187 KB 🎉
Bundle Size Analyzer	Link	Link

@storybook/preact-vite

	Before	After	Difference
Dependency count	20	20	0
Self size	13 KB	13 KB	0 B
Dependency size	2.35 MB	2.15 MB	🎉 -200 KB 🎉
Bundle Size Analyzer	Link	Link

@storybook/react-native-web-vite

	Before	After	Difference
Dependency count	159	159	0
Self size	30 KB	30 KB	🚨 +18 B 🚨
Dependency size	23.15 MB	22.96 MB	🎉 -187 KB 🎉
Bundle Size Analyzer	Link	Link

@storybook/react-vite

	Before	After	Difference
Dependency count	117	117	0
Self size	35 KB	35 KB	0 B
Dependency size	19.76 MB	19.58 MB	🎉 -187 KB 🎉
Bundle Size Analyzer	Link	Link

@storybook/react-webpack5

	Before	After	Difference
Dependency count	278	278	0
Self size	24 KB	24 KB	🎉 -12 B 🎉
Dependency size	44.04 MB	44.06 MB	🚨 +13 KB 🚨
Bundle Size Analyzer	Link	Link

@storybook/server-webpack5

	Before	After	Difference
Dependency count	204	204	0
Self size	16 KB	16 KB	0 B
Dependency size	33.42 MB	33.43 MB	🚨 +13 KB 🚨
Bundle Size Analyzer	Link	Link

@storybook/svelte-vite

	Before	After	Difference
Dependency count	24	24	0
Self size	55 KB	55 KB	🎉 -12 B 🎉
Dependency size	27.02 MB	26.82 MB	🎉 -200 KB 🎉
Bundle Size Analyzer	Link	Link

@storybook/sveltekit

	Before	After	Difference
Dependency count	25	25	0
Self size	56 KB	56 KB	0 B
Dependency size	27.08 MB	26.88 MB	🎉 -200 KB 🎉
Bundle Size Analyzer	Link	Link

@storybook/vue3-vite

	Before	After	Difference
Dependency count	114	114	0
Self size	35 KB	35 KB	🚨 +24 B 🚨
Dependency size	44.18 MB	43.98 MB	🎉 -200 KB 🎉
Bundle Size Analyzer	Link	Link

@storybook/web-components-vite

	Before	After	Difference
Dependency count	21	21	0
Self size	19 KB	19 KB	🎉 -12 B 🎉
Dependency size	2.39 MB	2.19 MB	🎉 -200 KB 🎉
Bundle Size Analyzer	Link	Link

@storybook/cli

	Before	After	Difference
Dependency count	183	183	0
Self size	775 KB	775 KB	🚨 +84 B 🚨
Dependency size	67.56 MB	67.58 MB	🚨 +15 KB 🚨
Bundle Size Analyzer	Link	Link

@storybook/codemod

	Before	After	Difference
Dependency count	176	176	0
Self size	30 KB	30 KB	🚨 +36 B 🚨
Dependency size	66.13 MB	66.15 MB	🚨 +15 KB 🚨
Bundle Size Analyzer	Link	Link

@storybook/preset-react-webpack

	Before	After	Difference
Dependency count	170	170	0
Self size	18 KB	18 KB	0 B
Dependency size	31.19 MB	31.20 MB	🚨 +12 KB 🚨
Bundle Size Analyzer	Link	Link

@storybook/react

	Before	After	Difference
Dependency count	57	57	0
Self size	716 KB	717 KB	🚨 +810 B 🚨
Dependency size	12.91 MB	12.92 MB	🚨 +12 KB 🚨
Bundle Size Analyzer	Link	Link