Question: how do you add fields to the group?

[edalzell]

How do you add fields to the group? I can't see anything in the docs about that.

[eminos]

Oh shoot, you're right. There is no instructions in the README.
It's kind of the same as the Tabs Fieldtype. Any field that comes AFTER the Inline Group field in the blueprint will be grouped (visually in the CP).
https://github.com/eminos/statamic-tabs?tab=readme-ov-file#usage

This should be considered an experiment really since it works very differently from every other Statamic Fieldtype.
There is not really a concept in Statamic of a Field controlling behavior of sibling fields in this way.
But can still be useful sometimes and it's only doing stuff visually in the CP, so no change in the data structure (unlike the official Group Fieldtype which groups the saved data in an object).