CLI build not loading config file

[KutnerUri]

What version of Tailwind CSS are you using?

"@tailwindcss/cli": "4.1.5",
"tailwindcss": "4.1.5",

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

CRA 5.

What version of Node.js are you using?

v20.10.0

What browser are you using?

N/A

What operating system are you using?

MacOS

Reproduction URL

project.zip
expected - pnpm run build:tw to fail because of the error.
actual - just passes

Describe your issue

When running Tailwindcss CLI tool, it doesn't pick up the tailwind.config.js file.
throwing errors, invalid syntax, nothing. also removing the file doesn't produce errors in the CLI.

There doesn't seem to be any way to load config file from the CLI (ie --config <...>).
The tailwind.config.js is in the project root, next to the package.json.

[RobinMalfait]

Hey!

Make sure you link the config file in your CSS file. More info: https://tailwindcss.com/docs/upgrade-guide#using-a-javascript-config-file

[KutnerUri]

ahh! that was hard to find.
google search came back empty, and AI tools still think latest is v3.

[KutnerUri]

basically we're supposed to define everything in the CSS file though, no?