[Bug]: 9.1 beta - `No story files found for the specified pattern: src/**/*.mdx` in minimal installs

[yannbf]

Describe the bug

Minimal installs do not include addon docs, and therefore when running Storybook you get:
No story files found for the specified pattern: src/**/*.mdx

Repro:

• Go to an empty directory
• npx storybook@next init
• Select a template
• Select minimal installation option
• Run Storybook and see the warning

[dosubot]

This is expected behavior in Storybook 9.x minimal installs—addon-docs is intentionally excluded to keep dependencies minimal, which means MDX files and docs features won't work out of the box. If you need MDX or docs support, you can manually add it by running:

npx storybook add @storybook/addon-docs

This approach is documented in recent issues and pull requests, and aligns with the current design of minimal installs (docs, issue #31668, PR #31616).

Since no reproduction link was provided, per repository guidelines, a minimal reproduction on GitHub or StackBlitz is requested to help investigate further. Thank you!

To reply, just mention @dosu.

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