THIS IS A DATAPACK! You need to either add it to your world's datapack folder or use an automatic loader such as OpenLoader or Paxi.
This datapack fixes items from Simply Swords and Mine Cells that aren't tagged as daggers in Better Combat. This particularly was made for the Prominence modpack, to fix these daggers not interacting with other daggers (as some weapons have specific combos when dual-wielding another dagger, such as Gh'aj or Emberlash itself)
How to install?
Download the zip and put it in your world's datapacks folder.
Alternatively, install openloader or paxi, and put the datapack inside their data folder.