Build: Remove cleanup of Yarn berry directory in sandboxes

[yannbf]

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

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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.
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  • feature request: Introducing a new feature.
  • BREAKING CHANGE: Changes that break compatibility in some way with current major version.
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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
  • Sandbox termination no longer removes the Yarn Berry cache directory; the cache is preserved after sandbox finalization.
  • No other functional behavior changes were introduced in this update.

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[nx-cloud]

View your CI Pipeline Execution ↗ for commit cbfe150

Command	Status	Duration	Result
nx run-many -t compile,check,knip,test,pretty-d...	❌ Failed	4h 7m	View ↗

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☁️ Nx Cloud last updated this comment at 2025-12-03 18:02:33 UTC

[nx-cloud]

View your CI Pipeline Execution ↗ for commit a65f5ee

Command	Status	Duration	Result
nx run-many -t compile --parallel=3	✅ Succeeded	45s	View ↗

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☁️ Nx Cloud last updated this comment at 2025-12-03 11:33:21 UTC

[coderabbitai]

📝 Walkthrough

Walkthrough

Removed the import of homedir and the finalization code that deleted the Yarn Berry cache directory; the sandbox generation script no longer removes the cache at ~/.yarn/berry during termination.

Changes

Cohort / File(s)	Summary
Sandbox generation script scripts/sandbox/generate.ts	Removed the homedir import and deleted the finalization block that cleaned up the Yarn Berry cache directory (~/.yarn/berry), so the cache is retained after sandbox generation completes.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

• Single-file change with small removals.
• Check for any remaining references to homedir and whether retaining the cache impacts disk usage or subsequent runs.

Possibly related PRs

• Build: Cleanup space in sandbox generation runner #33223: Modifies the same scripts/sandbox/generate.ts Yarn Berry cache cleanup behavior (adds cleanup vs. this PR removes it).
• Build: Fix windows  #33221: Also updates scripts/sandbox/generate.ts and touches sandbox generation commands and registry usage.

✨ Finishing touches

• 📝 Generate docstrings

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📥 Commits

Reviewing files that changed from the base of the PR and between a65f5ee and cbfe150.

📒 Files selected for processing (1)

• scripts/sandbox/generate.ts (0 hunks)

💤 Files with no reviewable changes (1)

• scripts/sandbox/generate.ts

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• GitHub Check: normal
• GitHub Check: Core Unit Tests, windows-latest
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