CLI: Fix sb CLI by explicitly exporting bin/index.cjs from storybook package

[ghengeveld]

Closes #31807

What I did

Added an entry for ./bin/index.cjs to the exports map for the storybook package so that require('storybook/bin/index.cjs') does not throw ERR_PACKAGE_PATH_NOT_EXPORTED.

Checklist for Contributors

Testing

The changes in this PR are covered in the following automated tests:

• stories
• unit tests
• integration tests
• end-to-end tests

Manual testing

This section is mandatory for all contributions. If you believe no manual test is necessary, please state so explicitly. Thanks!

Documentation

• Add or update documentation reflecting your changes
• If you are deprecating/removing a feature, make sure to update
  MIGRATION.MD

Checklist for Maintainers

• When this PR is ready for testing, make sure to add ci:normal, ci:merged or ci:daily GH label to it to run a specific set of sandboxes. The particular set of sandboxes can be found in code/lib/cli-storybook/src/sandbox-templates.ts

• Make sure this PR contains one of the labels below:

  Available labels

  • bug: Internal changes that fixes incorrect behavior.
  • maintenance: User-facing maintenance tasks.
  • dependencies: Upgrading (sometimes downgrading) dependencies.
  • build: Internal-facing build tooling & test updates. Will not show up in release changelog.
  • cleanup: Minor cleanup style change. Will not show up in release changelog.
  • documentation: Documentation only changes. Will not show up in release changelog.
  • feature request: Introducing a new feature.
  • BREAKING CHANGE: Changes that break compatibility in some way with current major version.
  • other: Changes that don't fit in the above categories.

🦋 Canary release

This pull request has been released as version 0.0.0-pr-31922-sha-01fa8b2d. Try it out in a new sandbox by running npx storybook@0.0.0-pr-31922-sha-01fa8b2d sandbox or in an existing project with npx storybook@0.0.0-pr-31922-sha-01fa8b2d upgrade.

More information

Published version	0.0.0-pr-31922-sha-01fa8b2d
Triggered by	@ghengeveld
Repository	storybookjs/storybook
Branch	export-storybook-bin-index.cjs
Commit	01fa8b2d
Datetime	Tue Jul 1 15:58:11 UTC 2025 (1751385491)
Workflow run	16004313012

To request a new release of this pull request, mention the @storybookjs/core team.

core team members can create a new canary release here or locally with gh workflow run --repo storybookjs/storybook canary-release-pr.yml --field pr=31922

Greptile Summary

Fixed the Storybook CLI (sb) by adding ./bin/index.cjs to the package exports map, resolving the ERR_PACKAGE_PATH_NOT_EXPORTED error when running CLI commands like npx sb@latest upgrade.

• Added explicit export mapping for ./bin/index.cjs in code/core/package.json
• Ensures proper binary entrypoint accessibility following Node.js package exports rules
• Maintains compatibility with both CommonJS (require()) and ESM import patterns
• Fixes critical CLI functionality that was previously broken for end users

[greptile-apps]

LGTM

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[nx-cloud]

View your CI Pipeline Execution ↗ for commit 01fa8b2.

Command	Status	Duration	Result
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nx run-many -t build -c production --parallel=3	✅ Succeeded	2s	View ↗

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☁️ Nx Cloud last updated this comment at 2025-07-02 13:59:11 UTC

[storybook-app-bot]

Package Benchmarks

^{Commit: 01fa8b2, ran on 2 July 2025 at 14:03:26 UTC}

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

storybook

	Before	After	Difference
Dependency count	51	51	0
Self size	31.75 MB	31.73 MB	🎉 -19 KB 🎉
Dependency size	17.43 MB	17.43 MB	0 B
Bundle Size Analyzer	Link	Link

@storybook/nextjs

	Before	After	Difference
Dependency count	536	537	🚨 +1 🚨
Self size	903 KB	903 KB	0 B
Dependency size	58.92 MB	58.97 MB	🚨 +49 KB 🚨
Bundle Size Analyzer	Link	Link

@storybook/nextjs-vite

	Before	After	Difference
Dependency count	130	130	0
Self size	3.08 MB	3.08 MB	0 B
Dependency size	22.25 MB	22.27 MB	🚨 +17 KB 🚨
Bundle Size Analyzer	Link	Link

@storybook/react-native-web-vite

	Before	After	Difference
Dependency count	161	161	0
Self size	35 KB	35 KB	🎉 -129 B 🎉
Dependency size	23.26 MB	23.28 MB	🚨 +17 KB 🚨
Bundle Size Analyzer	Link	Link

@storybook/react-vite

	Before	After	Difference
Dependency count	120	120	0
Self size	32 KB	32 KB	0 B
Dependency size	20.20 MB	20.22 MB	🚨 +17 KB 🚨
Bundle Size Analyzer	Link	Link

@storybook/react-webpack5

	Before	After	Difference
Dependency count	285	285	0
Self size	25 KB	25 KB	0 B
Dependency size	43.52 MB	43.53 MB	🚨 +17 KB 🚨
Bundle Size Analyzer	Link	Link

@storybook/vue3-vite

	Before	After	Difference
Dependency count	104	104	0
Self size	34 KB	34 KB	0 B
Dependency size	42.70 MB	42.73 MB	🚨 +32 KB 🚨
Bundle Size Analyzer	Link	Link

sb

	Before	After	Difference
Dependency count	52	52	0
Self size	1 KB	1 KB	0 B
Dependency size	49.18 MB	49.16 MB	🎉 -19 KB 🎉
Bundle Size Analyzer	Link	Link

@storybook/preset-react-webpack

	Before	After	Difference
Dependency count	176	176	0
Self size	24 KB	24 KB	0 B
Dependency size	30.35 MB	30.36 MB	🚨 +17 KB 🚨
Bundle Size Analyzer	Link	Link