/cfish lets you manipulate the loot you get from fishing.

Note: Fishing manipulation was patched in Minecraft 1.20. This command will be unavailable unless playing on an older server version through ViaFabricPlus.

• Fishing rod (doesn't need enchantments)
• A big enough area with water (5x5x2 with the fishing bobber in the center)
  • 2 blocks horizontally in each direction from the bobber and 1 block vertically up or down
• Lily Pad
  • For the fishing bobber to rest below
• Stable ping, meaning it doesn't fluctuate too much. (recommended to be under 90ms but higher may work)
• The tempRule fishingManipulation is set to either manual or afk
  • When set to afk the bobber is automatically thrown after being retracted
• Server RNG-Manipulation works on (more information).

/cfish add-enchanted-goal <item> (with|without) <enchantment> <level> ...
/cfish add-goal <item>
/cfish list-goals
/cfish remove-goal <index>

Proper tutorial video by Earthcomputer

With all requirements

1. Add goal to cfish
   • For Example: /cfish add-enchanted-goal minecraft:enchanted_book with minecraft:feather_falling 2 without minecraft:depth_strider *
     
2. Place Lilly Pad in fishing area
3. Cast rod making sure the bobber is fully submerged in the water (under lilly pad or block)
4. /cfish will auto reel for you. To recast, use the afk argument for /cfish.