The Knife would be a new tool added by Farmer's Delight, for two main purposes:

• Scavenging: guarantee secondary drops from mobs or certain plants, or enable drops not normally obtainable:
  • Straw from tall grass, Bark from wood logs;
  • Cows always drop 1 leather, chickens always drop 1 feather;
  • Better odds of Wither Skeleton skulls or Shulker Shells, for example.
• Cooking Utensil: used to enable recipes, or extract resources from items. Might use a new workstation for that, or push the limits of crafting recipes leaving stuff on the grid. Examples:
  • Fish Heads, Bone Meal and Fish Filet from Raw Fish;
  • Slices of Cake when used directly on Cake blocks.

Knives would be mediocre weapons with a fast swing, and enchantable like a sword. The basic one must be made of Flint, but subsequent knives follow standard Minecraft progression. Yes, we would even have a Netherite knife, if we ever make it to 1.16 later.

• Add Knife items
• Add crafting recipes for each Knife
• Make Knives be tools with durability
• Make Knives deal damage to mobs
• Figure out a way to get cake slices using knives
• Create a forge tag for knives
• Implement conditions for knives to guarantee secondary loots