WP-CLI support?

Not at this time. That may be something we add after we change the plugin to use new methodology, however.

Is there a rough timeline for that? Or is it whenever you get free time?

No timeline as of yet. Theme check is likely changing to use code sniffs instead if the current system. So, might be a while.

Thanks. That’s good to know.

We had a PR for this some time ago but it was never merged https://github.com/WordPress/theme-check/pull/2

We are working to use PHPCS for the new version of the Theme Check. The PHPCS works in the command line. https://github.com/WPTRT/WordPress-Coding-Standards/