CLI: Change message in downgrade-blocker

[ndelangen]

Closes #32611

What I did

I made a minor text change to the message printed when a user tries to downgrade (not supported)

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.

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Summary by CodeRabbit

• Bug Fixes
  • Updated the downgrade prevention message: consolidated into a single-line notification and removed the explicit reference to the 8.0 migration guide.
  • Updated the guidance link to point to the general migration/releases migration guide for upgrade instructions.

[coderabbitai]

📝 Walkthrough

Walkthrough

Updated the Downgrade Not Supported user-facing message in the block-major-version module: the message text was consolidated into a single line and the explicit reference to the 8.0 migration guide was removed; the guidance link was changed to the releases migration guide URL.

Changes

Cohort / File(s)	Summary
Downgrade Not Supported message code/lib/cli-storybook/src/autoblock/block-major-version.ts	Consolidated the "Downgrade Not Supported" message into one line, removed the explicit 8.0 migration-guide instruction, and updated the guidance link to https://storybook.js.org/docs/releases/migration-guide?ref=upgrade.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Possibly related PRs

• Fix: Incorrect URLS for the upgrade command #32624 — also updates CLI user-facing messaging to point to the releases migration-guide URL.

✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch norbert/improve-downgrade-blocker-messaging

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📥 Commits

Reviewing files that changed from the base of the PR and between 311c268 and ec8becc.

📒 Files selected for processing (1)

• code/lib/cli-storybook/src/autoblock/block-major-version.ts (1 hunks)

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📓 Path-based instructions (4)

**/*.{js,jsx,json,html,ts,tsx,mjs}

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Run ESLint on changed files and fix all errors/warnings before committing (use yarn lint:js:cmd <file>)

Files:

• code/lib/cli-storybook/src/autoblock/block-major-version.ts

**/*.{ts,tsx,js,jsx,mjs}

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Export functions from modules when they need to be unit-tested

Files:

• code/lib/cli-storybook/src/autoblock/block-major-version.ts

code/**/*.{ts,tsx,js,jsx,mjs}

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In application code, use Storybook loggers instead of console.* (client code: storybook/internal/client-logger; server code: storybook/internal/node-logger)

Files:

• code/lib/cli-storybook/src/autoblock/block-major-version.ts

{code/**,scripts/**}/**/*.{ts,tsx,js,jsx,mjs}

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Do not use console.log, console.warn, or console.error directly unless in isolated files where importing loggers would significantly increase bundle size

Files:

• code/lib/cli-storybook/src/autoblock/block-major-version.ts

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🔇 Additional comments (1)

code/lib/cli-storybook/src/autoblock/block-major-version.ts (1)

75-83: Link verification confirms all changes are correct.

The migration guide link returns HTTP 200 and is accessible. The downgrade message block successfully removes hardcoded version references and provides clear, version-agnostic messaging. All PR objectives have been addressed and past feedback has been incorporated.

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[nx-cloud]

View your CI Pipeline Execution ↗ for commit 354a48f

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☁️ Nx Cloud last updated this comment at 2025-10-20 12:32:25 UTC

[storybook-app-bot]

Package Benchmarks

^{Commit: 311c268, ran on 16 October 2025 at 12:08:24 UTC}

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

@storybook/builder-webpack5

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Dependency count	187	187	0
Self size	68 KB	68 KB	0 B
Dependency size	31.85 MB	31.87 MB	🚨 +23 KB 🚨
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@storybook/angular

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Dependency count	187	187	0
Self size	126 KB	126 KB	0 B
Dependency size	29.98 MB	30.00 MB	🚨 +23 KB 🚨
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@storybook/ember

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Dependency count	191	191	0
Self size	17 KB	17 KB	0 B
Dependency size	28.56 MB	28.58 MB	🚨 +23 KB 🚨
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@storybook/nextjs

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Dependency count	532	532	0
Self size	950 KB	950 KB	0 B
Dependency size	58.55 MB	58.57 MB	🚨 +23 KB 🚨
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@storybook/react-webpack5

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Dependency count	272	272	0
Self size	25 KB	25 KB	0 B
Dependency size	43.51 MB	43.53 MB	🚨 +23 KB 🚨
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@storybook/server-webpack5

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Dependency count	199	199	0
Self size	17 KB	17 KB	0 B
Dependency size	33.10 MB	33.12 MB	🚨 +23 KB 🚨
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@storybook/cli

	Before	After	Difference
Dependency count	187	187	0
Self size	927 KB	927 KB	🎉 -73 B 🎉
Dependency size	79.92 MB	79.95 MB	🚨 +23 KB 🚨
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@storybook/codemod

	Before	After	Difference
Dependency count	169	169	0
Self size	35 KB	35 KB	0 B
Dependency size	76.35 MB	76.38 MB	🚨 +23 KB 🚨
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@storybook/preset-react-webpack

	Before	After	Difference
Dependency count	170	170	0
Self size	21 KB	21 KB	0 B
Dependency size	31.00 MB	31.02 MB	🚨 +23 KB 🚨
Bundle Size Analyzer	Link	Link