Are Item Stages/Recipe Stages supported in Kubejs?

[brazen rain]

As title says, I know there is some integration with Game Stages, but is it necessary to use CraftTweaks (I despise zs) or can things be achieved in Kubejs as well?

Simply put, I'm making a basic linear progression system, and in some stages, say, stone age, I'd want to disable all recipes/items iron tier and above (manual labour is fine). I can of course (de-)register recipes, JEI stuff by tracking ftbquest completion, but a lot of the work could be done by just using Item Stages mod.

[timid kite]

Once your ticket has been resolved, please close it with </ticket close:1054771505520717835> command!

[cyan flare]

Kjs has built in stages, but switches to the mod if it’s installed

[brazen rain]

But is that functionality simply flags set on players (i.e. this player has this stage), or is there more to it? Item Stages has this functionality:

• Holding a restricted item will cause it to be dropped immediately. (Configurable)
• Equipping the item to offhand, armor, or bauble slot will cause it to be dropped. (Configurable)
• Players can not right click or left click with the item. (Configurable)
• The tooltip will be replaced with a restricted message.
• The item will not be visible in JEI

Am I able to simply mark items in Kubejs to work in roughly ^ that way, or would I have to manually code events for it? Or would Item Stages work with Kubejs (in their CF page they only mention ZS, so I assume it wouldn't work)? Basically, what's the functionality of kjs stages?