ok did i actually do it

CHANGELOG.txt

@@ -14,6 +14,9 @@ What's new:
     - Can climb up walls.
     - Can be scooped up in Buckets.
     - Will drop its Claw upon death, which can be cooked.
+- Added the Reach Boost effect!
+    - Extends the player's reach by 0.75 per level.
+    - Does not affect attacking, only impacts interactions with Items and Blocks, including both placing and breaking.
 - Fixed Jellyfish no longer spawning in Jellyfish Caves.
 - Slightly optimized Rainbow Jellyfish rendering.
 - Added a translation string for Coconut projectiles.

src/main/java/net/frozenblock/wilderwild/mixin/entity/crab/ServerGamePacketListenerImpl.java

@@ -0,0 +1,34 @@
+package net.frozenblock.wilderwild.mixin.entity.crab;
+
+import com.llamalad7.mixinextras.injector.ModifyReturnValue;
+import net.frozenblock.wilderwild.registry.RegisterMobEffects;
+import net.minecraft.server.level.ServerPlayer;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+import org.spongepowered.asm.mixin.injection.At;
+
+@Mixin(ServerGamePacketListenerImpl.class)
+public class ServerGamePacketListenerImpl {
+
+	@Shadow
+	public ServerPlayer player;
+
+	@ModifyReturnValue(method = "handleUseItemOn", at = @At(value = "FIELD", target = "Lnet/minecraft/server/network/ServerGamePacketListenerImpl;MAX_INTERACTION_DISTANCE:D"))
+	public double wilderWild$handleUseItemOn(double original) {
+		if (this.player != null && this.player.hasEffect(RegisterMobEffects.REACH)) {
+			int amplifier = this.player.getEffect(RegisterMobEffects.REACH).getAmplifier() + 1;
+			return original + (amplifier * 0.75D);
+		}
+		return original;
+	}
+
+	@ModifyReturnValue(method = "handleInteract", at = @At(value = "FIELD", target = "Lnet/minecraft/server/network/ServerGamePacketListenerImpl;MAX_INTERACTION_DISTANCE:D"))
+	public double wilderWild$handleInteract(double original) {
+		if (this.player != null && this.player.hasEffect(RegisterMobEffects.REACH)) {
+			int amplifier = this.player.getEffect(RegisterMobEffects.REACH).getAmplifier() + 1;
+			return original + (amplifier * 0.75D);
+		}
+		return original;
+	}
+
+}

src/main/resources/wilderwild.mixins.json

@@ -36,6 +36,7 @@
     "entity.boat.BoatDropsMixin",
     "entity.boat.BoatTypeMixin",
     "entity.boat.ChestBoatDropsMixin",
+    "entity.crab.ServerGamePacketListenerImpl",
     "entity.crab.ServerPlayerGameModeMixin",
     "entity.crab.VibrationSystemTickerMixin",
     "entity.crab.WallClimberNavigationMixin",