Created 1.18 R1 (plugin's native version) nms package.

Created 1.18 R1 handling of sending player abilities packet and tested on spigot.
Documented force_protocolib config.

nms/v1_18R1/build.gradle.kts

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+import org.jetbrains.kotlin.gradle.dsl.JvmTarget
+
+group = rootProject.group
+version = rootProject.version
+
+plugins {
+    id("io.papermc.paperweight.userdev")
+}
+
+dependencies {
+    implementation(project(":nms:nms-common"))
+
+    // Used for nms
+    paperweight.paperDevBundle("1.18-R0.1-SNAPSHOT")
+}
+
+repositories {
+    maven("https://repo.papermc.io/repository/maven-public/")
+
+}
+
+// As minecraft 1.18 work with java 1.17 or above. we set language version to 1.17
+
+// Configure used version of kotlin and java
+java {
+    disableAutoTargetJvm()
+    toolchain.languageVersion.set(JavaLanguageVersion.of(17))
+}
+
+// Set target version
+tasks.withType<JavaCompile>().configureEach {
+    sourceCompatibility = "17"
+    targetCompatibility = "17"
+
+    options.encoding = "UTF-8"
+}
+
+kotlin {
+    compilerOptions {
+        apiVersion.set(org.jetbrains.kotlin.gradle.dsl.KotlinVersion.KOTLIN_2_0)
+        jvmTarget.set(JvmTarget.JVM_17)
+    }
+}

nms/v1_18R1/src/main/kotlin/xyz/alexcrea/cuanvil/dependency/packet/versions/V1_18R1_Manager.kt

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+package xyz.alexcrea.cuanvil.dependency.packet.versions
+
+import net.minecraft.network.protocol.game.ClientboundPlayerAbilitiesPacket
+import net.minecraft.world.entity.player.Abilities
+import org.bukkit.craftbukkit.v1_18_R1.entity.CraftPlayer
+import org.bukkit.entity.Player
+import xyz.alexcrea.cuanvil.dependency.packet.PacketManager
+import xyz.alexcrea.cuanvil.dependency.packet.PacketManagerBase
+
+class V1_18R1_Manager : PacketManagerBase(), PacketManager {
+    override val canSetInstantBuild: Boolean
+        get() = true
+
+    override fun setInstantBuild(player: Player, instantBuild: Boolean) {
+        val nmsPlayer = (player as CraftPlayer).handle
+        val playerAbilities = nmsPlayer.abilities
+        val sendedAbilities: Abilities
+        if (playerAbilities.instabuild == instantBuild) {
+            sendedAbilities = playerAbilities
+        } else {
+            sendedAbilities = Abilities()
+            sendedAbilities.invulnerable = playerAbilities.invulnerable
+            sendedAbilities.flying = playerAbilities.flying
+            sendedAbilities.mayfly = playerAbilities.mayfly
+            sendedAbilities.instabuild = instantBuild
+            sendedAbilities.mayBuild = playerAbilities.mayBuild
+            sendedAbilities.flyingSpeed = playerAbilities.flyingSpeed
+            sendedAbilities.walkingSpeed = playerAbilities.walkingSpeed
+        }
+        val packet = ClientboundPlayerAbilitiesPacket(sendedAbilities)
+        nmsPlayer.connection.send(packet)
+    }
+}