I would like a config option to learn to craft waystones only after attuning to a number of them in world, as a tie in to worldgen waystones.

I don't think this would be obvious enough and would confuse players as to why they aren't craftable.

However, I am adding a stat for how many times a waystone has been activated, which JSON recipes (and possibly CraftTweaker too) should be able to read and react to.

That'll solve my uses perfectly, thanks!