CLI: Capture the version specifier used in create-storybook

[shilman]

Closes N/A.

What I did

Introduces logic to detect and report the Storybook version used to initiate a project by inspecting the ancestry of process commands. The main changes add a dependency for process ancestry inspection, implement a utility to extract the Storybook version from the ancestry, and update telemetry reporting to include this version specifier. Comprehensive tests were added to verify the new utility

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

• Publish to verdaccio
• Run init commands with STORYBOOK_TELEMETRY_DEBUG=1

🦋 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>

[greptile-apps]

_{3 files reviewed, 2 comments}

_{Edit Code Review Bot Settings | Greptile}

[greptile-apps]

style: The regex pattern could potentially match false positives. Consider using a more specific pattern like /(?:^|\s|-)storybook@([^\s]+)/ to ensure proper word boundaries.

[greptile-apps]

style: Test name 'possible storybook path' is unclear - consider renaming to 'returns undefined for storybook command without create/init keywords'

Suggested change

	const ancestry = [{ command: 'node' }, { command: 'storybook@7.0.0' }, { command: 'npm' }];
	expect(getStorybookVersionFromAncestry(ancestry as any)).toBeUndefined();
	});
	it('returns undefined for storybook command without create/init keywords', () => {
	const ancestry = [{ command: 'node' }, { command: 'storybook@7.0.0' }, { command: 'npm' }];
	expect(getStorybookVersionFromAncestry(ancestry as any)).toBeUndefined();
	});

[nx-cloud]

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---

☁️ Nx Cloud last updated this comment at 2025-09-11 11:28:56 UTC

[shilman]

Make more specific to match create-storybook.

Also search in reverse order because storybook@latest init calls create-storybook@x.y.z so the latter is lower in the stack.

[JReinhold]

LGTM, only one minor nit.

[storybook-app-bot]

Package Benchmarks

^{Commit: f3e5667, ran on 11 September 2025 at 11:10:59 UTC}

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

storybook

	Before	After	Difference
Dependency count	48	48	0
Self size	30.74 MB	30.62 MB	🎉 -119 KB 🎉
Dependency size	17.61 MB	17.61 MB	0 B
Bundle Size Analyzer	Link	Link

@storybook/cli

	Before	After	Difference
Dependency count	204	219	🚨 +15 🚨
Self size	879 KB	879 KB	🎉 -90 B 🎉
Dependency size	81.72 MB	81.82 MB	🚨 +104 KB 🚨
Bundle Size Analyzer	Link	Link

@storybook/codemod

	Before	After	Difference
Dependency count	173	188	🚨 +15 🚨
Self size	35 KB	35 KB	🎉 -12 B 🎉
Dependency size	76.79 MB	76.89 MB	🚨 +100 KB 🚨
Bundle Size Analyzer	Link	Link

create-storybook

	Before	After	Difference
Dependency count	49	49	0
Self size	1.52 MB	1.52 MB	🚨 +5 KB 🚨
Dependency size	48.35 MB	48.23 MB	🎉 -119 KB 🎉
Bundle Size Analyzer	node	node