Core: Cleanup of type following up v9 and small verbatimModuleSyntax type fix

[alcpereira]

What I did

• Cleanup of the fix Core: Fix undeclared internal dependencies #30566 now that v9 is live
• Fix a typecheck issue related to verbatimModuleSyntax while working on the cleanup

   ✖  nx run svelte:check
      ====================================
      Loading svelte-check in workspace: /xxx/storybook/code/renderers/svelte
      Getting Svelte diagnostics...

      /xxx/storybook/code/renderers/svelte/../../core/src/actions/preview.ts:7:10
      Error: Re-exporting a type when 'verbatimModuleSyntax' is enabled requires using 'export type'.

      export { ActionsTypes };

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
• hopefully covered by type checking 🤞

Manual testing

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

Those are TypeScript changes that should have no impact.

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 PR does not have a canary release associated. You can request a canary release of this pull request by mentioning the @storybookjs/core team here.

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

Greptile Summary

Updates TypeScript type exports to support verbatimModuleSyntax and cleans up v9-related type definitions in core modules.

• Modifies export { ActionsTypes } to use explicit export type in code/core/src/actions/preview.ts to fix verbatimModuleSyntax errors
• Removes temporary Renderer interface that extended CSFRenderer in code/core/src/types/modules/csf.ts
• Switches to direct export of Renderer type from storybook/internal/csf
• Removes unnecessary CSFRenderer import for cleaner type definitions

[greptile-apps]

LGTM

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[nx-cloud]

View your CI Pipeline Execution ↗ for commit 352914f.

Command	Status	Duration	Result
nx run-many -t build --parallel=3	✅ Succeeded	1m 17s	View ↗

---

☁️ Nx Cloud last updated this comment at 2025-06-23 13:40:14 UTC

[storybook-app-bot]

Package Benchmarks

^{Commit: 352914f, ran on 23 June 2025 at 13:26:31 UTC}

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

storybook

	Before	After	Difference
Dependency count	49	49	0
Self size	31.87 MB	31.85 MB	🎉 -16 KB 🎉
Dependency size	17.41 MB	17.41 MB	0 B
Bundle Size Analyzer	Link	Link

sb

	Before	After	Difference
Dependency count	50	50	0
Self size	1 KB	1 KB	🎉 -20 B 🎉
Dependency size	49.27 MB	49.26 MB	🎉 -16 KB 🎉
Bundle Size Analyzer	Link	Link

@storybook/cli

	Before	After	Difference
Dependency count	216	216	0
Self size	582 KB	582 KB	🎉 -20 B 🎉
Dependency size	95.13 MB	95.12 MB	🎉 -16 KB 🎉
Bundle Size Analyzer	Link	Link

@storybook/codemod

	Before	After	Difference
Dependency count	185	185	0
Self size	31 KB	31 KB	0 B
Dependency size	79.26 MB	79.25 MB	🎉 -16 KB 🎉
Bundle Size Analyzer	Link	Link