IntelliSense suggests weird `__CSS_VALUES__` value

[benface]

What version of Tailwind CSS are you using?

v4.1.12, and actually even the most recent insiders version (0.0.0-insiders.8165e04)

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

None, just tailwindcss and @tailwindcss/cli

What version of Node.js are you using?

v24.5.0

What browser are you using?

N/A

What operating system are you using?

macOS

Reproduction URL steps / Describe your issue

In a legacy @plugin:

matchUtilities(
  {
    foo: (value) => ({
      "--foo": value,
    }),
  },
  {
    values: theme("colors"),
  }
);

In the HTML:

<div class="foo-
               ^
               First IntelliSense suggestion:
               - foo-__CSS_VALUES__

[thecrypticace]

Will have this fixed in the next release 👍