Agglomeration only seems to work with Things accessories.

[Nova-Katt]

Minecraft 1.21 and also 1.21.1
Things: All versions I've tried so far.
Fabric 0.16.7

So as I mentioned on the discord, there are plenty of mods that add accessories/trinkets to the game that can be equipped in the trinkets/accessories slots.

The agglomeration is a very powerful item that can combine two trinkets from the same slot into 1 item with the effect of both items.

However.... any item that is NOT from the Things mod... stops having effect when it's agglomerated.
They can absolutely be put into the agglomeration, so that part works.
But, you only get the effect if it's from Things.

As example I have trinkets from Affinity, Artifacts and Things right now, and, well... Affinity only gives me two rings, which no other mod I have does, so no need to agglomerate there.
Artifacts however gives me PLENTY of accessories, that are uncraftable, you have to find them in loot, which is superfun. And I would love to be able to combine them either with other Artifacts, or with other Things.
Things + Things = 2 effects
Things + Artifacts = 1 effect (only Things)
Artifacts + Artifacts = 0 effects
They just stop functioning once they are stuck in the agglomeration sphere.
This is also extra sad since there is no way to uncraft the sphere and get the item back, the item that you can't craft but has to find as loot.

So for instance, looking at the EMI index I currenly get 13 different items for the Shoes slt, but only 4 can be combined as they are from Things.
I mean the others -can- be combined, they just stop doing anything.

Is this a bug, or intentional?
I would love the agglomeration to function with any possible trinkets from different mods (as long as they share the same slot ofc).

[Dragon-Seeker]

So my investigation into this matter comes down to their manual iteration over trinkets inventory with their helper class here and here that leads to issues where the agglomeration stack inner stacks will never be found.

I hook into the existing method of obtaining all the stacks within the trinkets API so it works with some items that just check for if something is present like the invis scarf but idk how easy this is to fix besides making a PR / discussing this with them.

[silentSquid]

Also happening on 1.20.1 mod version 0.3.3 and Artifacts version 9.5.13
Happening with some items though, like both green and blue claws work together, but bunny slippers and steadfast spikes combined both dont work