Build: Temporarily disable CRA sandboxes

[yannbf]

Closes #

What I did

React 19 upstream issues have been occurring in our CI so for now we disable the CRA sandboxes.

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 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>

name	before	after	diff	z	%
createSize	0 B	0 B	0 B	-	-
generateSize	77.7 MB	77.7 MB	-4.28 kB	-3.73	0%
initSize	130 MB	130 MB	14.7 kB	-1.2	0%
diffSize	52.4 MB	52.5 MB	19 kB	1.94	0%
buildSize	6.75 MB	6.75 MB	0 B	-0.65	0%
buildSbAddonsSize	1.51 MB	1.51 MB	0 B	-	0%
buildSbCommonSize	195 kB	195 kB	0 B	-	0%
buildSbManagerSize	1.86 MB	1.86 MB	0 B	1.33	0%
buildSbPreviewSize	0 B	0 B	0 B	-0.65	-
buildStaticSize	0 B	0 B	0 B	-	-
buildPrebuildSize	3.57 MB	3.57 MB	0 B	-0.65	0%
buildPreviewSize	3.19 MB	3.19 MB	0 B	0.65	0%
testBuildSize	0 B	0 B	0 B	-	-
testBuildSbAddonsSize	0 B	0 B	0 B	-	-
testBuildSbCommonSize	0 B	0 B	0 B	-	-
testBuildSbManagerSize	0 B	0 B	0 B	-	-
testBuildSbPreviewSize	0 B	0 B	0 B	-	-
testBuildStaticSize	0 B	0 B	0 B	-	-
testBuildPrebuildSize	0 B	0 B	0 B	-	-
testBuildPreviewSize	0 B	0 B	0 B	-	-

name	before	after	diff	z	%
createTime	6.8s	17.9s	11.1s	0.39	62.1%
generateTime	25.5s	19.6s	-5s -842ms	-0.61	-29.7%
initTime	15.9s	13.3s	-2s -573ms	-0.25	-19.2%
buildTime	8.1s	10.1s	2s	1.03	20%
testBuildTime	0ms	0ms	0ms	-	-
devPreviewResponsive	5.4s	4.9s	-412ms	-0.34	-8.3%
devManagerResponsive	3.8s	3.5s	-287ms	-0.38	-8%
devManagerHeaderVisible	555ms	647ms	92ms	0.91	14.2%
devManagerIndexVisible	629ms	688ms	59ms	0.43	8.6%
devStoryVisibleUncached	1.9s	2s	76ms	1.07	3.8%
devStoryVisible	627ms	690ms	63ms	0.48	9.1%
devAutodocsVisible	408ms	540ms	132ms	0.52	24.4%
devMDXVisible	562ms	577ms	15ms	0.7	2.6%
buildManagerHeaderVisible	549ms	585ms	36ms	0.18	6.2%
buildManagerIndexVisible	622ms	656ms	34ms	0.23	5.2%
buildStoryVisible	498ms	536ms	38ms	0.01	7.1%
buildAutodocsVisible	440ms	570ms	130ms	1.9	🔺22.8%
buildMDXVisible	404ms	559ms	155ms	2.68	🔺27.7%

Greptile Summary

Temporarily disables Create React App (CRA) sandboxes in the test suite due to React 19 compatibility issues, with corresponding adjustments to CI parallelism counts.

• Commented out cra/default-ts and cra/default-js from normal and daily test runs in code/lib/cli-storybook/src/sandbox-templates.ts
• Reduced parallelism in CI jobs from 13 to 8 for create/build sandboxes in .circleci/config.yml
• Reduced parallelism for e2e and test-runner jobs proportionally
• CRA templates remain defined but are excluded from test execution until React 19 issues are resolved

[greptile-apps]

LGTM

_{2 file(s) reviewed, no comment(s)
Edit PR Review Bot Settings | Greptile}

[nx-cloud]

☁️ Nx Cloud Report

CI is running/has finished running commands for commit 32c8e43. As they complete they will appear below. Click to see the status, the terminal output, and the build insights.

📂 See all runs for this CI Pipeline Execution

---

✅ Successfully ran 2 targets

• nx affected -t check -c production --parallel=7
• nx run-many -t build -c production --parallel=3

---

Sent with 💌 from NxCloud.