It would be extremely useful for modpack makers to add their own recipes to GT machines.
Currently it fails to load a datapack with this recipe for example:
{ "type":"antimatter:gt.recipe_map.pulverizing", "group":"waystones", "ingredient":{ "item":"waystones:warp_stone" }, "result":"waystones:warp_dust" }

Failed to parse recipe 'minecraft:test[antimatter:gt.recipe_map.pulverizing]'! Falling back to vanilla: java.lang.NullPointerException: Unknown recipe type: antimatter:gt.recipe_map.pulverizing

Datapack recipes are vanilla thing, so looks like an easy yet useful feature to implement.
And as a bonus, kubejs has datapack recipes support.

P.S. Full kubejs integration will be useful too though, however it looks more complex to implement.

Datapacks and kubeJS are supported. See the discord for example. The type is always antimatter:machine, but you have to specify the map.

{
"type": "antimatter:machine",
"item_in": [
{
"tag": "forge:ores/iron",
"count": 1
}
],
"item_out": [
{
"item": "minecraft:iron_ingot",
"count": 2
}
],
"euT": 8,
"duration": 80,
"map": "gti:chemical_reacting"
}

You can now add json recipes!

Will close this and start working on a wiki page somewhere, maybe within the github repo.