Build: Optimize sandbox generation scripts in link mode

[valentinpalkovic]

Closes #

What I did

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

Caution

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 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 publish.yml --field pr=<PR_NUMBER>

Summary by CodeRabbit

• Chores
  • Broadened template support by adding three additional Next.js + Vite variants to resolution logic, improving compatibility for more project templates and influencing React/react-dom version overrides where applicable.
  • Simplified internal compilation verification: build success is now determined by presence of expected output files, reducing reliance on file content inspection.

[github-actions]

	Fails
🚫	The "#### Manual testing" section must be filled in. Please describe how to test the changes you've made, step by step, so that reviewers can confirm your PR works as intended.

Generated by 🚫 dangerJS against 4ffbc7a

[coderabbitai]

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📝 Walkthrough

Walkthrough

Simplified compilation ready check in scripts/tasks/compile.ts: removed linkedContents-based inspection and now treat successful file reads (index.js when linking, index.d.ts otherwise) as success. Expanded additionalReact19Resolutions in scripts/utils/yarn.ts with three Next.js + Vite template keys.

Changes

Cohort / File(s)	Summary
Compilation Logic Simplification scripts/tasks/compile.ts	Removed exported linkedContents usage and removed logic that inspected index.d.ts to infer compilation status. compile.ready now reads index.js when linking and index.d.ts when not, returning success based on successful file read rather than file content.
React 19 Resolution Expansion scripts/utils/yarn.ts	Added three new Next.js + Vite template keys to additionalReact19Resolutions: nextjs-vite/15-ts, nextjs-vite/default-ts, and nextjs-vite/14-ts. No other logic changes.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~12 minutes

Possibly related PRs

• Build: Allow linked mode for react-native-web-expo sandbox #33310: Modifies additionalReact19Resolutions in scripts/utils/yarn.ts to add Next.js + Vite template variants.

✨ Finishing Touches

• 📝 Generate docstrings (stacked PR)
• 📝 Generate docstrings (commit on current branch)

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[nx-cloud]

View your CI Pipeline Execution ↗ for commit 4ffbc7a

Command	Status	Duration	Result
nx run-many -t compile,check,knip,test,pretty-d...	❌ Failed	10m 49s	View ↗

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☁️ Nx Cloud last updated this comment at 2026-02-20 13:07:55 UTC

[nx-cloud]

View your CI Pipeline Execution ↗ for commit 2f85e31

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☁️ Nx Cloud last updated this comment at 2026-02-20 11:15:27 UTC