`@variant` is recognized inside `addBase`, but not inside `addUtilities` or `addComponents`

[benface]

What version of Tailwind CSS are you using?

v4.1.16

What build tool (or framework if it abstracts the build tool) are you using?

Vite 7.1.12

What version of Node.js are you using?

v24.10.0

What browser are you using?

N/A

What operating system are you using?

macOS

Reproduction URL code

In a legacy JS plugin:

addBase({
  '.some-selector': {
    '@variant hover': {
      // hover styles, which will actually work because `@variant` will be transformed into a proper selector
    },
  },
})

addUtilities({  // or `addComponents`
  '.some-selector': {
    '@variant hover': {
      // does NOT work; the compiled CSS will contain `@variant hover` instead of a proper selector
    },
  },
})

Describe your issue

See above. Thank you!

[thecrypticace]

added tests to make sure it keeps working inside addBase and went ahead and made it work for addUtilities/matchUtilities (and components) 👍

Will be in the next release and should be testable via insiders in like 20–30m or so.