Release: Patch 10.4.2

[github-actions]

This is an automated pull request that bumps the version from `10.4.1` to `10.4.2`.
Once this pull request is merged, it will trigger a new release of version `10.4.2`.
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: Build: Upgrade type-fest to latest version 5.6.0 #34791
• 🐛 Bug: CSF: Fix parsing of string literal export names #34901
• 🐛 Bug: Bug: Fix Windows command resolution for non-Node package managers #33534
• 🔧 Maintenance: Publish: Add npm provenance attestations #34936
• 🏗️ Build: Build: Remove borked submodules #34862

🍒 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.

• #34862: `git cherry-pick -m1 -x d35ac5f`

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

10.4.2

• Bug: Fix Windows command resolution for non-Node package managers - #33534, thanks copilot-swe-agent!
• Build: Upgrade type-fest to latest version 5.6.0 - #34791, thanks tobiasdiez!
• CSF: Fix parsing of string literal export names - #34901, thanks shilman!
• Publish: Add npm provenance attestations - #34936, thanks copilot-swe-agent!

[storybook-app-bot]

Package Benchmarks

^{Commit: 54bfe2a, ran on 2 June 2026 at 10:08:52 UTC}

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

storybook

	Before	After	Difference
Dependency count	60	60	0
Self size	20.54 MB	20.56 MB	🚨 +23 KB 🚨
Dependency size	32.77 MB	32.77 MB	0 B
Bundle Size Analyzer	Link	Link

@storybook/angular

	Before	After	Difference
Dependency count	185	185	0
Self size	142 KB	160 KB	🚨 +17 KB 🚨
Dependency size	31.24 MB	31.24 MB	🚨 +413 B 🚨
Bundle Size Analyzer	Link	Link

@storybook/nextjs

	Before	After	Difference
Dependency count	534	534	0
Self size	662 KB	662 KB	0 B
Dependency size	62.04 MB	62.07 MB	🚨 +35 KB 🚨
Bundle Size Analyzer	Link	Link

@storybook/nextjs-vite

	Before	After	Difference
Dependency count	93	93	0
Self size	1.37 MB	1.37 MB	0 B
Dependency size	24.81 MB	24.84 MB	🚨 +35 KB 🚨
Bundle Size Analyzer	Link	Link

@storybook/preact-vite

	Before	After	Difference
Dependency count	14	14	0
Self size	13 KB	13 KB	0 B
Dependency size	1.47 MB	1.49 MB	🚨 +23 KB 🚨
Bundle Size Analyzer	Link	Link

@storybook/react-native-web-vite

	Before	After	Difference
Dependency count	122	122	0
Self size	30 KB	30 KB	0 B
Dependency size	25.88 MB	25.91 MB	🚨 +35 KB 🚨
Bundle Size Analyzer	Link	Link

@storybook/react-vite

	Before	After	Difference
Dependency count	83	83	0
Self size	35 KB	35 KB	0 B
Dependency size	22.58 MB	22.62 MB	🚨 +35 KB 🚨
Bundle Size Analyzer	Link	Link

@storybook/react-webpack5

	Before	After	Difference
Dependency count	271	271	0
Self size	23 KB	23 KB	🎉 -12 B 🎉
Dependency size	46.57 MB	46.60 MB	🚨 +35 KB 🚨
Bundle Size Analyzer	Link	Link

@storybook/svelte-vite

	Before	After	Difference
Dependency count	19	20	🚨 +1 🚨
Self size	56 KB	56 KB	🎉 -12 B 🎉
Dependency size	26.66 MB	27.02 MB	🚨 +360 KB 🚨
Bundle Size Analyzer	Link	Link

@storybook/sveltekit

	Before	After	Difference
Dependency count	20	21	🚨 +1 🚨
Self size	56 KB	56 KB	0 B
Dependency size	26.71 MB	27.07 MB	🚨 +360 KB 🚨
Bundle Size Analyzer	Link	Link

@storybook/tanstack-react

	Before	After	Difference
Dependency count	84	84	0
Self size	107 KB	106 KB	🎉 -1 KB 🎉
Dependency size	22.62 MB	22.65 MB	🚨 +35 KB 🚨
Bundle Size Analyzer	Link	Link

@storybook/vue3-vite

	Before	After	Difference
Dependency count	108	109	🚨 +1 🚨
Self size	36 KB	36 KB	0 B
Dependency size	43.75 MB	44.11 MB	🚨 +360 KB 🚨
Bundle Size Analyzer	Link	Link

@storybook/web-components-vite

	Before	After	Difference
Dependency count	15	15	0
Self size	19 KB	19 KB	🎉 -12 B 🎉
Dependency size	1.52 MB	1.54 MB	🚨 +17 KB 🚨
Bundle Size Analyzer	Link	Link

@storybook/cli

	Before	After	Difference
Dependency count	194	194	0
Self size	908 KB	908 KB	🚨 +89 B 🚨
Dependency size	85.49 MB	85.52 MB	🚨 +23 KB 🚨
Bundle Size Analyzer	Link	Link

@storybook/codemod

	Before	After	Difference
Dependency count	187	187	0
Self size	32 KB	32 KB	🚨 +36 B 🚨
Dependency size	83.98 MB	84.01 MB	🚨 +23 KB 🚨
Bundle Size Analyzer	Link	Link

create-storybook

	Before	After	Difference
Dependency count	61	61	0
Self size	1.08 MB	1.08 MB	0 B
Dependency size	53.31 MB	53.34 MB	🚨 +23 KB 🚨
Bundle Size Analyzer	node	node

@storybook/preact

	Before	After	Difference
Dependency count	2	2	0
Self size	23 KB	46 KB	🚨 +23 KB 🚨
Dependency size	32 KB	32 KB	0 B
Bundle Size Analyzer	Link	Link

@storybook/react

	Before	After	Difference
Dependency count	59	59	0
Self size	1.47 MB	1.51 MB	🚨 +34 KB 🚨
Dependency size	13.32 MB	13.32 MB	🚨 +419 B 🚨
Bundle Size Analyzer	Link	Link

@storybook/svelte

	Before	After	Difference
Dependency count	2	3	🚨 +1 🚨
Self size	49 KB	49 KB	🎉 -11 B 🎉
Dependency size	230 KB	590 KB	🚨 +360 KB 🚨
Bundle Size Analyzer	Link	Link

@storybook/vue3

	Before	After	Difference
Dependency count	3	4	🚨 +1 🚨
Self size	66 KB	66 KB	🚨 +7 B 🚨
Dependency size	213 KB	573 KB	🚨 +360 KB 🚨
Bundle Size Analyzer	Link	Link

@storybook/web-components

	Before	After	Difference
Dependency count	3	3	0
Self size	62 KB	79 KB	🚨 +17 KB 🚨
Dependency size	47 KB	47 KB	0 B
Bundle Size Analyzer	Link	Link