For example ability to use their ground salt the same as your salt if it exists?
Probably should consider making a tag and using that tag for any and all your recipes also. cause I'd bet harvestcraft has it's own salt too, so that all the salts can be cross used. Since yours so far is the only one with dynamic food salting I think.

Salt already uses a forge:salts tag for recipes.
The only thing, I can think of, that's incompatible (or not configurable) right now is growing salt crystals - you can't change what block will grow.

chuck "spelunkery:salt" in there then also. theirs isn't tagged.
your own salt recipes also don't seem to actually take "any forge:salts" also.

the food takes "any salt:can_be_salted" but the salt only takes itself. :V

All these things can be configured easily by datapack, KubeJS or CraftTweaker.

just trying to save others some time. so I don't have to edit all your recipes for your own tagged salt. :V

accepts properly.

doesn't accept properly even if I did tag the salt myself.

unless I'm missing some coding shenanigans that'll just make it work anyways after the fact...

{
  "type": "minecraft:crafting_shapeless",
  "category": "misc",
  "ingredients": [
    {
      "tag": "forge:salts"
    },
    {
      "tag": "forge:salts"
    },
    {
      "tag": "minecraft:coals"
    }
  ],
  "result": {
    "count": 2,
    "item": "minecraft:gunpowder"
  }
}

Gunpowder recipe uses tag.

I will consider changing other recipes.

huh. so I guess the thing doesn't actually show "accepts any" if theres only actually one thing in there? interesting. didn't consider. sorry for doubting you.