you have flint as a valid stone_tool_material could u remove this please as i have pickle tweaks installed and they are conflicting when i create the pickle tweaks flint pickaxe

You can just disable that recipe in the utility recipes feature config.

Disabling is a option... but how about a blacklist in some future version. I like the idea of any stone working to make the tools but like the posts author I have mod that limit access to progress through flint, then move onto stone.
If you can if not still like the mod I will just have to find a workaround [maybe build you code with a slight change]