Initial commit

src/main/java/com/kasetoatz/boatjump/BoatJump.java

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+package com.kasetoatz.boatjump;
+
+import net.fabricmc.api.ClientModInitializer;
+import net.minecraft.client.MinecraftClient;
+
+public class BoatJump implements ClientModInitializer {
+    public static MinecraftClient client;
+
+    @Override
+    public void onInitializeClient() {
+        client = MinecraftClient.getInstance();
+    }
+}

src/main/java/com/kasetoatz/boatjump/mixin/EntityMixin.java

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+package com.kasetoatz.boatjump.mixin;
+
+import com.kasetoatz.boatjump.BoatJump;
+import net.minecraft.entity.Entity;
+import net.minecraft.entity.LivingEntity;
+import net.minecraft.entity.vehicle.BoatEntity;
+import org.jetbrains.annotations.Nullable;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable;
+
+@Mixin(Entity.class)
+public abstract class EntityMixin {
+    @Shadow @Nullable public abstract LivingEntity getControllingPassenger();
+
+    @Inject(method="getStepHeight", at = @At("HEAD"), cancellable = true)
+    public void getStepHeight(CallbackInfoReturnable<Float> cir) {
+        if ((Entity)(Object)this instanceof BoatEntity && this.getControllingPassenger() == BoatJump.client.player) {
+            cir.setReturnValue(1.f);
+        }
+    }
+}

src/main/resources/boatjump.mixins.json

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+{
+  "required": true,
+  "minVersion": "0.8",
+  "package": "com.kasetoatz.boatjump.mixin",
+  "compatibilityLevel": "JAVA_21",
+  "client": [
+    "EntityMixin"
+  ],
+  "injectors": {
+    "defaultRequire": 1
+  }
+}

src/main/resources/fabric.mod.json

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+{
+  "schemaVersion": 1,
+  "id": "boatjump",
+  "version": "${version}",
+  "name": "BoatJump",
+  "description": "",
+  "authors": [],
+  "contact": {
+    "repo": "https://github.com/KaseToatz1337/NoExplosionGrief"
+  },
+  "license": "MIT",
+  "environment": "*",
+  "entrypoints": {
+    "client": [
+      "com.kasetoatz.boatjump.BoatJump"
+    ]
+  },
+  "mixins": [
+    "boatjump.mixins.json"
+  ],
+  "depends": {
+    "fabricloader": ">=${loader_version}",
+    "fabric": "*",
+    "minecraft": "${minecraft_version}"
+  }
+}