Release: Patch 9.1.15

[github-actions]

This is an automated pull request that bumps the version from 9.1.14 to 9.1.15.
Once this pull request is merged, it will trigger a new release of version 9.1.15.
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:

• 📦 Dependencies: Dependencies: Update vite-plugin-storybook-nextjs #32821
• 🔧 Maintenance: Core: Add preview-first-load telemetry #32770

🍒 Manual cherry picking needed!

The following pull requests could not be cherry-picked automatically because it resulted in merge conflicts.
For each pull request below, you need to either manually cherry pick it, or discard it by replacing the "patch:yes" label with "patch:no" on the PR and re-generate this PR.

• #32770: git cherry-pick -m1 -x 124987da165c3a3a2512a4f5d8a90c751754d7fa

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

9.1.15

• Core: Add preview-first-load telemetry - #32770, thanks shilman!
• Dependencies: Update vite-plugin-storybook-nextjs - #32821, thanks ndelangen!

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[nx-cloud]

View your CI Pipeline Execution ↗ for commit 83cda97

Command	Status	Duration	Result
nx run-many -t build --parallel=3	✅ Succeeded	1m 11s	View ↗

---

☁️ Nx Cloud last updated this comment at 2025-10-24 15:26:08 UTC

[storybook-app-bot]

Package Benchmarks

^{Commit: 83cda97, ran on 24 October 2025 at 15:12:09 UTC}

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

storybook

	Before	After	Difference
Dependency count	50	50	0
Self size	35.76 MB	36.40 MB	🚨 +633 KB 🚨
Dependency size	16.65 MB	16.65 MB	🚨 +7 B 🚨
Bundle Size Analyzer	Link	Link

sb

	Before	After	Difference
Dependency count	51	51	0
Self size	1 KB	1 KB	0 B
Dependency size	52.41 MB	53.05 MB	🚨 +633 KB 🚨
Bundle Size Analyzer	Link	Link

@storybook/cli

	Before	After	Difference
Dependency count	220	220	0
Self size	598 KB	598 KB	0 B
Dependency size	97.50 MB	98.39 MB	🚨 +898 KB 🚨
Bundle Size Analyzer	Link	Link

@storybook/codemod

	Before	After	Difference
Dependency count	189	189	0
Self size	31 KB	31 KB	0 B
Dependency size	81.59 MB	82.23 MB	🚨 +643 KB 🚨
Bundle Size Analyzer	Link	Link

create-storybook

	Before	After	Difference
Dependency count	1	1	0
Self size	12.50 MB	12.75 MB	🚨 +255 KB 🚨
Dependency size	99 KB	99 KB	0 B
Bundle Size Analyzer	Link	Link