This mod is a wrapper for a datapack that simply makes Farmer's Delight Knives (and Nether's Delight Machetes) count as modified swords to the Tetra tool system.
This allows Tetra to use Knives as cutting implements in the Worktable!
You can also put the items onto the Tetra workbench and change a tool part to transform them into variously modified Tetra swords
The Tetra equivalents for knives and machetes are textured differently to the items, so they may suddenly change appearance if modified.
Also note that if you convert a knife to a Tetra shortsword, it will no longer be able to cut items on a cutting board or harvest straw.
If you'd prefer, the raw datapack can be downloaded here.