Addon A11y: Don't set a11y tag as comment in automigrations

[valentinpalkovic]

Closes #

What I did

Since we haven't found consensus related to the syntax and meaning of the current a11y-test tag, we will remove its documentation and its scaffolding in the user's .storybook/preview.<js|ts>.

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	77.9 MB	77.9 MB	0 B	1.73	0%
initSize	131 MB	131 MB	606 B	1.7	0%
diffSize	52.9 MB	52.9 MB	606 B	-0.9	0%
buildSize	7.19 MB	7.19 MB	0 B	2.31	0%
buildSbAddonsSize	1.85 MB	1.85 MB	0 B	-1.22	0%
buildSbCommonSize	195 kB	195 kB	0 B	-	0%
buildSbManagerSize	1.87 MB	1.87 MB	0 B	3	0%
buildSbPreviewSize	0 B	0 B	0 B	-	-
buildStaticSize	0 B	0 B	0 B	-	-
buildPrebuildSize	3.91 MB	3.91 MB	0 B	1.98	0%
buildPreviewSize	3.28 MB	3.28 MB	0 B	2.37	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	6.5s	27.2s	20.7s	1.81	🔺76%
generateTime	19.4s	21.3s	1.8s	0.38	8.8%
initTime	12.7s	13.6s	908ms	-0.48	6.6%
buildTime	8.6s	12.3s	3.6s	3.54	🔺29.3%
testBuildTime	0ms	0ms	0ms	-	-
devPreviewResponsive	4.7s	4.4s	-276ms	-1.06	-6.2%
devManagerResponsive	3.4s	3.2s	-185ms	-1.17	-5.7%
devManagerHeaderVisible	641ms	550ms	-91ms	-0.89	-16.5%
devManagerIndexVisible	676ms	562ms	-114ms	-1.09	-20.3%
devStoryVisibleUncached	1.8s	1.7s	-88ms	-0.4	-5.1%
devStoryVisible	675ms	582ms	-93ms	-0.95	-16%
devAutodocsVisible	569ms	520ms	-49ms	-0.42	-9.4%
devMDXVisible	573ms	488ms	-85ms	-0.82	-17.4%
buildManagerHeaderVisible	555ms	497ms	-58ms	-1.25	🔰-11.7%
buildManagerIndexVisible	641ms	588ms	-53ms	-1.23	-9%
buildStoryVisible	536ms	489ms	-47ms	-1.19	-9.6%
buildAutodocsVisible	495ms	412ms	-83ms	-1.23	-20.1%
buildMDXVisible	450ms	410ms	-40ms	-1.12	-9.8%

Greptile Summary

This PR modifies Storybook's accessibility testing configuration by removing automated inclusion of the a11y-test tag during migrations, due to lack of consensus on its implementation.

• Set skipPreviewTransformation: true by default in code/lib/cli-storybook/src/automigrate/fixes/addon-a11y-addon-test.ts
• Removed documentation files for a11y-test tag usage in docs/_snippets/
• Updated docs/writing-tests/accessibility-testing.mdx to remove configuration section
• Modified tests in addon-a11y-addon-test.test.ts to reflect skipped preview transformations

[nx-cloud]

View your CI Pipeline Execution ↗ for commit e82df08.

Command	Status	Duration	Result
nx run-many -t build --parallel=3	✅ Succeeded	1m 35s	View ↗

---

☁️ Nx Cloud last updated this comment at 2025-01-15 08:28:56 UTC

[greptile-apps]

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[greptile-apps]

LGTM

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