It would be useful if Kate and the family supported the basic syntax of Justfiles, the Makefile-inspired collections of code snippets used by a command runner called just. Here is the GitHub page of the project, including the descriptions of the file format: https://github.com/casey/just.
Looks like a reasonable wishlist, thanks - quite a bit of "prior art" from other editors' syntax highlighting on the project's page if that's at all relevant or helpful