Update to 1.20.4

README.md

@@ -51,9 +51,8 @@ dependencies {
   compileOnly("cc.tweaked:cc-tweaked-$mcVersion-common-api:$cctVersion")
 
   // Forge Gradle
-  compileOnly("cc.tweaked:cc-tweaked-$mcVersion-core-api:$cctVersion")
+  compileOnly("cc.tweaked:cc-tweaked-$mcVersion-forge-api:$cctVersion")
-  compileOnly(fg.deobf("cc.tweaked:cc-tweaked-$mcVersion-forge-api:$cctVersion"))
+  runtimeOnly("cc.tweaked:cc-tweaked-$mcVersion-forge:$cctVersion")
-  runtimeOnly(fg.deobf("cc.tweaked:cc-tweaked-$mcVersion-forge:$cctVersion"))
 
   // Fabric Loom
   modCompileOnly("cc.tweaked:cc-tweaked-$mcVersion-fabric-api:$cctVersion")

buildSrc/build.gradle.kts

@@ -14,18 +14,14 @@ repositories {
     mavenCentral()
     gradlePluginPortal()
 
-    maven("https://maven.minecraftforge.net") {
+    maven("https://maven.neoforged.net/releases") {
-        name = "Forge"
+        name = "NeoForge"
         content {
             includeGroup("net.minecraftforge")
-            includeGroup("net.minecraftforge.gradle")
+            includeGroup("net.neoforged")
-        }
+            includeGroup("net.neoforged.gradle")
-    }
+            includeModule("codechicken", "DiffPatch")
-
+            includeModule("net.covers1624", "Quack")
-    maven("https://maven.parchmentmc.org") {
-        name = "Librarian"
-        content {
-            includeGroupByRegex("^org\\.parchmentmc.*")
         }
     }
 
@@ -51,10 +47,9 @@ dependencies {
 
     implementation(libs.curseForgeGradle)
     implementation(libs.fabric.loom)
-    implementation(libs.forgeGradle)
     implementation(libs.ideaExt)
-    implementation(libs.librarian)
     implementation(libs.minotaur)
+    implementation(libs.neoGradle.userdev)
     implementation(libs.vanillaExtract)
 }
 

buildSrc/src/main/kotlin/cc-tweaked.forge.gradle.kts

@@ -10,10 +10,8 @@ import cc.tweaked.gradle.IdeaRunConfigurations
 import cc.tweaked.gradle.MinecraftConfigurations
 
 plugins {
-    id("net.minecraftforge.gradle")
-    // We must apply java-convention after Forge, as we need the fg extension to be present.
     id("cc-tweaked.java-convention")
-    id("org.parchmentmc.librarian.forgegradle")
+    id("net.neoforged.gradle.userdev")
 }
 
 plugins.apply(CCTweakedPlugin::class.java)
@@ -21,10 +19,20 @@ plugins.apply(CCTweakedPlugin::class.java)
 val mcVersion: String by extra
 
 minecraft {
-    val libs = project.extensions.getByType<VersionCatalogsExtension>().named("libs")
+    modIdentifier("computercraft")
-    mappings("parchment", "${libs.findVersion("parchmentMc").get()}-${libs.findVersion("parchment").get()}-$mcVersion")
+}
 
-    accessTransformer(project(":forge").file("src/main/resources/META-INF/accesstransformer.cfg"))
+subsystems {
+    parchment {
+        val libs = project.extensions.getByType<VersionCatalogsExtension>().named("libs")
+        minecraftVersion = libs.findVersion("parchmentMc").get().toString()
+        mappingsVersion = libs.findVersion("parchment").get().toString()
+    }
+}
+
+dependencies {
+    val libs = project.extensions.getByType<VersionCatalogsExtension>().named("libs")
+    implementation("net.neoforged:neoforge:${libs.findVersion("neoForge").get()}")
 }
 
 MinecraftConfigurations.setup(project)
@@ -32,13 +40,3 @@ MinecraftConfigurations.setup(project)
 extensions.configure(CCTweakedExtension::class.java) {
     linters(minecraft = true, loader = "forge")
 }
-
-dependencies {
-    val libs = project.extensions.getByType<VersionCatalogsExtension>().named("libs")
-    "minecraft"("net.minecraftforge:forge:$mcVersion-${libs.findVersion("forge").get()}")
-}
-
-tasks.configureEach {
-    // genIntellijRuns isn't registered until much later, so we need this silly hijinks.
-    if (name == "genIntellijRuns") doLast { IdeaRunConfigurations(project).patch() }
-}

buildSrc/src/main/kotlin/cc-tweaked.java-convention.gradle.kts

@@ -40,21 +40,10 @@ repositories {
 
     val mainMaven = maven("https://squiddev.cc/maven") {
         name = "SquidDev"
-        content {
-            // Until https://github.com/SpongePowered/Mixin/pull/593 is merged
-            includeModule("org.spongepowered", "mixin")
-        }
     }
 
     exclusiveContent {
         forRepositories(mainMaven)
-
-        // Include the ForgeGradle repository if present. This requires that ForgeGradle is already present, which we
-        // enforce in our Forge overlay.
-        val fg =
-            project.extensions.findByType(net.minecraftforge.gradle.userdev.DependencyManagementExtension::class.java)
-        if (fg != null) forRepositories(fg.repository)
-
         filter {
             includeGroup("cc.tweaked")
             // Things we mirror

buildSrc/src/main/kotlin/cc/tweaked/gradle/ForgeExtensions.kt

@@ -4,23 +4,59 @@
 
 package cc.tweaked.gradle
 
-import net.minecraftforge.gradle.common.util.RunConfig
+import net.neoforged.gradle.common.runs.run.RunImpl
-import net.minecraftforge.gradle.common.util.runs.setRunConfigInternal
+import net.neoforged.gradle.common.runs.tasks.RunExec
+import net.neoforged.gradle.dsl.common.extensions.RunnableSourceSet
+import net.neoforged.gradle.dsl.common.runs.run.Run
 import org.gradle.api.plugins.JavaPluginExtension
 import org.gradle.api.tasks.JavaExec
+import org.gradle.api.tasks.SourceSet
 import org.gradle.jvm.toolchain.JavaToolchainService
+import org.gradle.kotlin.dsl.assign
+import org.gradle.kotlin.dsl.create
+import org.gradle.kotlin.dsl.findByType
 import java.nio.file.Files
 
 /**
  * Set [JavaExec] task to run a given [RunConfig].
+ *
+ * See also [RunExec].
  */
-fun JavaExec.setRunConfig(config: RunConfig) {
+fun JavaExec.setRunConfig(config: Run) {
-    dependsOn("prepareRuns")
+    mainClass.set(config.mainClass)
-    setRunConfigInternal(project, this, config)
+    workingDir = config.workingDirectory.get().asFile
-    doFirst("Create working directory") { Files.createDirectories(workingDir.toPath()) }
+    argumentProviders.add { config.programArguments.get() }
+    jvmArgumentProviders.add { config.jvmArguments.get() }
+
+    environment(config.environmentVariables.get())
+    systemProperties(config.systemProperties.get())
+
+    config.modSources.get().forEach { classpath(it.runtimeClasspath) }
+    classpath(config.classpath)
+    classpath(config.dependencies.get().configuration)
+
+    (config as RunImpl).taskDependencies.forEach { dependsOn(it) }
 
     javaLauncher.set(
         project.extensions.getByType(JavaToolchainService::class.java)
             .launcherFor(project.extensions.getByType(JavaPluginExtension::class.java).toolchain),
     )
+
+    doFirst("Create working directory") { Files.createDirectories(workingDir.toPath()) }
+}
+
+/**
+ * Add a new [Run.modSource] with a specific mod id.
+ */
+fun Run.modSourceAs(sourceSet: SourceSet, mod: String) {
+    // NeoGradle requires a RunnableSourceSet to be present, so we inject it into other project's source sets.
+    val runnable = sourceSet.extensions.findByType<RunnableSourceSet>() ?: run {
+        val extension = sourceSet.extensions.create<RunnableSourceSet>(RunnableSourceSet.NAME, project)
+        extension.modIdentifier = mod
+        extension.modIdentifier.finalizeValueOnRead()
+        extension
+    }
+    if (runnable.modIdentifier.get() != mod) throw IllegalArgumentException("Multiple mod identifiers")
+
+    modSource(sourceSet)
 }

buildSrc/src/main/kotlin/cc/tweaked/gradle/MinecraftExec.kt

@@ -4,7 +4,6 @@
 
 package cc.tweaked.gradle
 
-import net.minecraftforge.gradle.common.util.RunConfig
 import org.gradle.api.GradleException
 import org.gradle.api.file.FileSystemOperations
 import org.gradle.api.invocation.Gradle
@@ -65,14 +64,6 @@ abstract class ClientJavaExec : JavaExec() {
         setTestProperties()
     }
 
-    /**
-     * Set this task to run a given [RunConfig].
-     */
-    fun setRunConfig(config: RunConfig) {
-        (this as JavaExec).setRunConfig(config)
-        setTestProperties() // setRunConfig may clobber some properties, ensure everything is set.
-    }
-
     /**
      * Copy configuration from a task with the given name.
      */

buildSrc/src/main/kotlin/net/minecraftforge/gradle/common/util/runs/RunConfigSetup.kt

@@ -1,51 +0,0 @@
-// SPDX-FileCopyrightText: 2023 The CC: Tweaked Developers
-//
-// SPDX-License-Identifier: MPL-2.0
-
-package net.minecraftforge.gradle.common.util.runs
-
-import net.minecraftforge.gradle.common.util.RunConfig
-import org.gradle.api.Project
-import org.gradle.process.CommandLineArgumentProvider
-import org.gradle.process.JavaExecSpec
-import java.io.File
-import java.util.function.Supplier
-import java.util.stream.Collectors
-import java.util.stream.Stream
-
-/**
- * Set up a [JavaExecSpec] to execute a [RunConfig].
- *
- * [MinecraftRunTask] sets up all its properties when the task is executed, rather than when configured. As such, it's
- * not possible to use [cc.tweaked.gradle.copyToFull] like we do for Fabric. Instead, we set up the task manually.
- *
- * Unfortunately most of the functionality we need is package-private, and so we have to put our code into the package.
- */
-internal fun setRunConfigInternal(project: Project, spec: JavaExecSpec, config: RunConfig) {
-    spec.workingDir = File(config.workingDirectory)
-
-    spec.mainClass.set(config.main)
-    for (source in config.allSources) spec.classpath(source.runtimeClasspath)
-
-    val originalTask = project.tasks.named(config.taskName, MinecraftRunTask::class.java)
-
-    // Add argument and JVM argument via providers, to be as lazy as possible with fetching artifacts.
-    val lazyTokens = RunConfigGenerator.configureTokensLazy(
-        project, config, RunConfigGenerator.mapModClassesToGradle(project, config),
-        originalTask.get().minecraftArtifacts,
-        originalTask.get().runtimeClasspathArtifacts,
-    )
-    spec.argumentProviders.add(
-        CommandLineArgumentProvider {
-            RunConfigGenerator.getArgsStream(config, lazyTokens, false).toList()
-        },
-    )
-    spec.jvmArgumentProviders.add(
-        CommandLineArgumentProvider {
-            (if (config.isClient) config.jvmArgs + originalTask.get().additionalClientArgs.get() else config.jvmArgs).map { config.replace(lazyTokens, it) } +
-                config.properties.map { (k, v) -> "-D${k}=${config.replace(lazyTokens, v)}" }
-        },
-    )
-
-    for ((key, value) in config.environment) spec.environment(key, config.replace(lazyTokens, value))
-}

gradle.properties

@@ -9,8 +9,8 @@ kotlin.stdlib.default.dependency=false
 kotlin.jvm.target.validation.mode=error
 
 # Mod properties
-isUnstable=false
+isUnstable=true
 modVersion=1.109.5
 
 # Minecraft properties: We want to configure this here so we can read it in settings.gradle
-mcVersion=1.20.1
+mcVersion=1.20.4

gradle/libs.versions.toml

@@ -7,20 +7,20 @@
 # Minecraft
 # MC version is specified in gradle.properties, as we need that in settings.gradle.
 # Remember to update corresponding versions in fabric.mod.json/mods.toml
-fabric-api = "0.86.1+1.20.1"
+fabric-api = "0.93.1+1.20.4"
-fabric-loader = "0.14.21"
+fabric-loader = "0.15.3"
-forge = "47.1.0"
+neoForge = "20.4.142-beta"
-forgeSpi = "7.0.1"
+neoForgeSpi = "8.0.1"
 mixin = "0.8.5"
-parchment = "2023.08.20"
+parchment = "2023.12.31"
-parchmentMc = "1.20.1"
+parchmentMc = "1.20.3"
-yarn = "1.20.1+build.10"
+yarn = "1.20.4+build.3"
 
 # Core dependencies (these versions are tied to the version Minecraft uses)
-fastutil = "8.5.9"
+fastutil = "8.5.12"
-guava = "31.1-jre"
+guava = "32.1.2-jre"
-netty = "4.1.82.Final"
+netty = "4.1.97.Final"
-slf4j = "2.0.1"
+slf4j = "2.0.7"
 
 # Core dependencies (independent of Minecraft)
 asm = "9.6"
@@ -36,14 +36,14 @@ kotlin-coroutines = "1.7.3"
 nightConfig = "3.6.7"
 
 # Minecraft mods
-emi = "1.0.8+1.20.1"
+emi = "1.0.30+1.20.4"
 fabricPermissions = "0.3.20230723"
-iris = "1.6.4+1.20"
+iris = "1.6.14+1.20.4"
-jei = "15.2.0.22"
+jei = "16.0.0.28"
-modmenu = "7.1.0"
+modmenu = "9.0.0"
 moreRed = "4.0.0.4"
 oculus = "1.2.5"
-rei = "12.0.626"
+rei = "14.0.688"
 rubidium = "0.6.1"
 sodium = "mc1.20-0.4.10"
 
@@ -55,19 +55,17 @@ junit = "5.10.1"
 # Build tools
 cctJavadoc = "1.8.2"
 checkstyle = "10.12.6"
-curseForgeGradle = "1.0.14"
+curseForgeGradle = "1.1.18"
 errorProne-core = "2.23.0"
 errorProne-plugin = "3.1.0"
 fabric-loom = "1.5.7"
-forgeGradle = "6.0.20"
 githubRelease = "2.5.2"
 gradleVersions = "0.50.0"
 ideaExt = "1.1.7"
 illuaminate = "0.1.0-44-g9ee0055"
-librarian = "1.+"
 lwjgl = "3.3.3"
-minotaur = "2.+"
+minotaur = "2.8.7"
-mixinGradle = "0.7.38"
+neoGradle = "7.0.85"
 nullAway = "0.9.9"
 spotless = "6.23.3"
 taskTree = "2.1.1"
@@ -84,7 +82,7 @@ checkerFramework = { module = "org.checkerframework:checker-qual", version.ref =
 cobalt = { module = "cc.tweaked:cobalt", version.ref = "cobalt" }
 commonsCli = { module = "commons-cli:commons-cli", version.ref = "commonsCli" }
 fastutil = { module = "it.unimi.dsi:fastutil", version.ref = "fastutil" }
-forgeSpi = { module = "net.minecraftforge:forgespi", version.ref = "forgeSpi" }
+neoForgeSpi = { module = "net.neoforged:neoforgespi", version.ref = "neoForgeSpi" }
 guava = { module = "com.google.guava:guava", version.ref = "guava" }
 jetbrainsAnnotations = { module = "org.jetbrains:annotations", version.ref = "jetbrainsAnnotations" }
 jsr305 = { module = "com.google.code.findbugs:jsr305", version.ref = "jsr305" }
@@ -106,9 +104,9 @@ fabric-junit = { module = "net.fabricmc:fabric-loader-junit", version.ref = "fab
 fabricPermissions = { module = "me.lucko:fabric-permissions-api", version.ref = "fabricPermissions" }
 emi = { module = "dev.emi:emi-xplat-mojmap", version.ref = "emi" }
 iris = { module = "maven.modrinth:iris", version.ref = "iris" }
-jei-api = { module = "mezz.jei:jei-1.20.1-common-api", version.ref = "jei" }
+jei-api = { module = "mezz.jei:jei-1.20.2-common-api", version.ref = "jei" }
-jei-fabric = { module = "mezz.jei:jei-1.20.1-fabric", version.ref = "jei" }
+jei-fabric = { module = "mezz.jei:jei-1.20.2-fabric", version.ref = "jei" }
-jei-forge = { module = "mezz.jei:jei-1.20.1-forge", version.ref = "jei" }
+jei-forge = { module = "mezz.jei:jei-1.20.2-forge", version.ref = "jei" }
 mixin = { module = "org.spongepowered:mixin", version.ref = "mixin" }
 modmenu = { module = "com.terraformersmc:modmenu", version.ref = "modmenu" }
 moreRed = { module = "commoble.morered:morered-1.20.1", version.ref = "moreRed" }
@@ -144,11 +142,10 @@ errorProne-core = { module = "com.google.errorprone:error_prone_core", version.r
 errorProne-plugin = { module = "net.ltgt.gradle:gradle-errorprone-plugin", version.ref = "errorProne-plugin" }
 errorProne-testHelpers = { module = "com.google.errorprone:error_prone_test_helpers", version.ref = "errorProne-core" }
 fabric-loom = { module = "net.fabricmc:fabric-loom", version.ref = "fabric-loom" }
-forgeGradle = { module = "net.minecraftforge.gradle:ForgeGradle", version.ref = "forgeGradle" }
 ideaExt = { module = "gradle.plugin.org.jetbrains.gradle.plugin.idea-ext:gradle-idea-ext", version.ref = "ideaExt" }
 kotlin-plugin = { module = "org.jetbrains.kotlin:kotlin-gradle-plugin", version.ref = "kotlin" }
-librarian = { module = "org.parchmentmc:librarian", version.ref = "librarian" }
 minotaur = { module = "com.modrinth.minotaur:Minotaur", version.ref = "minotaur" }
+neoGradle-userdev = { module = "net.neoforged.gradle:userdev", version.ref = "neoGradle" }
 nullAway = { module = "com.uber.nullaway:nullaway", version.ref = "nullAway" }
 spotless = { module = "com.diffplug.spotless:spotless-plugin-gradle", version.ref = "spotless" }
 teavm-classlib = { module = "org.teavm:teavm-classlib", version.ref = "teavm" }
@@ -163,12 +160,9 @@ vanillaExtract = { module = "cc.tweaked.vanilla-extract:plugin", version.ref = "
 yarn = { module = "net.fabricmc:yarn", version.ref = "yarn" }
 
 [plugins]
-forgeGradle = { id = "net.minecraftforge.gradle", version.ref = "forgeGradle" }
 githubRelease = { id = "com.github.breadmoirai.github-release", version.ref = "githubRelease" }
 gradleVersions = { id = "com.github.ben-manes.versions", version.ref = "gradleVersions" }
 kotlin = { id = "org.jetbrains.kotlin.jvm", version.ref = "kotlin" }
-librarian = { id = "org.parchmentmc.librarian.forgegradle", version.ref = "librarian" }
-mixinGradle = { id = "org.spongepowered.mixin", version.ref = "mixinGradle" }
 taskTree = { id = "com.dorongold.task-tree", version.ref = "taskTree" }
 versionCatalogUpdate = { id = "nl.littlerobots.version-catalog-update", version.ref = "versionCatalogUpdate" }
 
@@ -179,9 +173,9 @@ kotlin = ["kotlin-stdlib", "kotlin-coroutines"]
 # Minecraft
 externalMods-common = ["jei-api", "nightConfig-core", "nightConfig-toml"]
 externalMods-forge-compile = ["moreRed", "oculus", "jei-api"]
-externalMods-forge-runtime = ["jei-forge"]
+externalMods-forge-runtime = []
 externalMods-fabric-compile = ["fabricPermissions", "iris", "jei-api", "rei-api", "rei-builtin"]
-externalMods-fabric-runtime = ["jei-fabric", "modmenu"]
+externalMods-fabric-runtime = []
 
 # Testing
 test = ["junit-jupiter-api", "junit-jupiter-params", "hamcrest", "jqwik-api"]

projects/common-api/src/client/java/dan200/computercraft/api/client/ComputerCraftAPIClient.java

@@ -1,43 +0,0 @@
-// SPDX-FileCopyrightText: 2022 The CC: Tweaked Developers
-//
-// SPDX-License-Identifier: MPL-2.0
-
-package dan200.computercraft.api.client;
-
-import dan200.computercraft.api.client.turtle.TurtleUpgradeModeller;
-import dan200.computercraft.api.turtle.ITurtleUpgrade;
-import dan200.computercraft.api.turtle.TurtleUpgradeSerialiser;
-import dan200.computercraft.impl.client.ComputerCraftAPIClientService;
-
-/**
- * The public API for client-only code.
- *
- * @see dan200.computercraft.api.ComputerCraftAPI The main API
- */
-public final class ComputerCraftAPIClient {
-    private ComputerCraftAPIClient() {
-    }
-
-    /**
-     * Register a {@link TurtleUpgradeModeller} for a class of turtle upgrades.
-     * <p>
-     * This may be called at any point after registry creation, though it is recommended to call it within your client
-     * setup step.
-     *
-     * @param serialiser The turtle upgrade serialiser.
-     * @param modeller   The upgrade modeller.
-     * @param <T>        The type of the turtle upgrade.
-     * @deprecated This method can lead to confusing load behaviour on Forge. Use
-     * {@code dan200.computercraft.api.client.FabricComputerCraftAPIClient#registerTurtleUpgradeModeller} on Fabric, or
-     * {@code dan200.computercraft.api.client.turtle.RegisterTurtleModellersEvent} on Forge.
-     */
-    @Deprecated(forRemoval = true)
-    public static <T extends ITurtleUpgrade> void registerTurtleUpgradeModeller(TurtleUpgradeSerialiser<T> serialiser, TurtleUpgradeModeller<T> modeller) {
-        // TODO(1.20.4): Remove this
-        getInstance().registerTurtleUpgradeModeller(serialiser, modeller);
-    }
-
-    private static ComputerCraftAPIClientService getInstance() {
-        return ComputerCraftAPIClientService.get();
-    }
-}

projects/common-api/src/client/java/dan200/computercraft/api/client/turtle/RegisterTurtleUpgradeModeller.java

@@ -5,7 +5,7 @@
 package dan200.computercraft.api.client.turtle;
 
 import dan200.computercraft.api.turtle.ITurtleUpgrade;
-import dan200.computercraft.api.turtle.TurtleUpgradeSerialiser;
+import dan200.computercraft.api.upgrades.UpgradeSerialiser;
 
 /**
  * A functional interface to register a {@link TurtleUpgradeModeller} for a class of turtle upgrades.
@@ -22,5 +22,5 @@ public interface RegisterTurtleUpgradeModeller {
      * @param modeller   The upgrade modeller.
      * @param <T>        The type of the turtle upgrade.
      */
-    <T extends ITurtleUpgrade> void register(TurtleUpgradeSerialiser<T> serialiser, TurtleUpgradeModeller<T> modeller);
+    <T extends ITurtleUpgrade> void register(UpgradeSerialiser<T> serialiser, TurtleUpgradeModeller<T> modeller);
 }

projects/common-api/src/client/java/dan200/computercraft/api/client/turtle/TurtleUpgradeModeller.java

@@ -8,7 +8,6 @@ import dan200.computercraft.api.client.TransformedModel;
 import dan200.computercraft.api.turtle.ITurtleAccess;
 import dan200.computercraft.api.turtle.ITurtleUpgrade;
 import dan200.computercraft.api.turtle.TurtleSide;
-import net.minecraft.client.resources.model.ModelResourceLocation;
 import net.minecraft.client.resources.model.UnbakedModel;
 import net.minecraft.nbt.CompoundTag;
 import net.minecraft.resources.ResourceLocation;
@@ -31,30 +30,15 @@ public interface TurtleUpgradeModeller<T extends ITurtleUpgrade> {
     /**
      * Obtain the model to be used when rendering a turtle peripheral.
      * <p>
-     * When the current turtle is {@literal null}, this function should be constant for a given upgrade and side.
+     * When the current turtle is {@literal null}, this function should be constant for a given upgrade, side and data.
      *
      * @param upgrade The upgrade that you're getting the model for.
-     * @param turtle  Access to the turtle that the upgrade resides on. This will be null when getting item models, unless
+     * @param turtle  Access to the turtle that the upgrade resides on. This will be null when getting item models.
-     *                {@link #getModel(ITurtleUpgrade, CompoundTag, TurtleSide)} is overriden.
      * @param side    Which side of the turtle (left or right) the upgrade resides on.
-     * @return The model that you wish to be used to render your upgrade.
-     */
-    TransformedModel getModel(T upgrade, @Nullable ITurtleAccess turtle, TurtleSide side);
-
-    /**
-     * Obtain the model to be used when rendering a turtle peripheral.
-     * <p>
-     * This is used when rendering the turtle's item model, and so no {@link ITurtleAccess} is available.
-     *
-     * @param upgrade The upgrade that you're getting the model for.
      * @param data    Upgrade data instance for current turtle side.
-     * @param side    Which side of the turtle (left or right) the upgrade resides on.
      * @return The model that you wish to be used to render your upgrade.
      */
-    default TransformedModel getModel(T upgrade, CompoundTag data, TurtleSide side) {
+    TransformedModel getModel(T upgrade, @Nullable ITurtleAccess turtle, TurtleSide side, CompoundTag data);
-        return getModel(upgrade, (ITurtleAccess) null, side);
-    }
-
 
     /**
      * Get a list of models that this turtle modeller depends on.
@@ -85,19 +69,6 @@ public interface TurtleUpgradeModeller<T extends ITurtleUpgrade> {
         return (TurtleUpgradeModeller<T>) TurtleUpgradeModellers.UPGRADE_ITEM;
     }
 
-    /**
-     * Construct a {@link TurtleUpgradeModeller} which has a single model for the left and right side.
-     *
-     * @param left  The model to use on the left.
-     * @param right The model to use on the right.
-     * @param <T>   The type of the turtle upgrade.
-     * @return The constructed modeller.
-     */
-    static <T extends ITurtleUpgrade> TurtleUpgradeModeller<T> sided(ModelResourceLocation left, ModelResourceLocation right) {
-        // TODO(1.21.0): Remove this.
-        return sided((ResourceLocation) left, right);
-    }
-
     /**
      * Construct a {@link TurtleUpgradeModeller} which has a single model for the left and right side.
      *
@@ -109,7 +80,7 @@ public interface TurtleUpgradeModeller<T extends ITurtleUpgrade> {
     static <T extends ITurtleUpgrade> TurtleUpgradeModeller<T> sided(ResourceLocation left, ResourceLocation right) {
         return new TurtleUpgradeModeller<>() {
             @Override
-            public TransformedModel getModel(T upgrade, @Nullable ITurtleAccess turtle, TurtleSide side) {
+            public TransformedModel getModel(T upgrade, @Nullable ITurtleAccess turtle, TurtleSide side, CompoundTag data) {
                 return TransformedModel.of(side == TurtleSide.LEFT ? left : right);
             }
 

projects/common-api/src/client/java/dan200/computercraft/api/client/turtle/TurtleUpgradeModellers.java

@@ -12,7 +12,6 @@ import dan200.computercraft.api.turtle.TurtleSide;
 import dan200.computercraft.impl.client.ClientPlatformHelper;
 import net.minecraft.client.Minecraft;
 import net.minecraft.nbt.CompoundTag;
-import net.minecraft.world.item.ItemStack;
 import org.joml.Matrix4f;
 
 import javax.annotation.Nullable;
@@ -37,16 +36,8 @@ final class TurtleUpgradeModellers {
 
     private static final class UpgradeItemModeller implements TurtleUpgradeModeller<ITurtleUpgrade> {
         @Override
-        public TransformedModel getModel(ITurtleUpgrade upgrade, @Nullable ITurtleAccess turtle, TurtleSide side) {
+        public TransformedModel getModel(ITurtleUpgrade upgrade, @Nullable ITurtleAccess turtle, TurtleSide side, CompoundTag data) {
-            return getModel(turtle == null ? upgrade.getCraftingItem() : upgrade.getUpgradeItem(turtle.getUpgradeNBTData(side)), side);
+            var stack = upgrade.getUpgradeItem(data);
-        }
-
-        @Override
-        public TransformedModel getModel(ITurtleUpgrade upgrade, CompoundTag data, TurtleSide side) {
-            return getModel(upgrade.getUpgradeItem(data), side);
-        }
-
-        private TransformedModel getModel(ItemStack stack, TurtleSide side) {
             var model = Minecraft.getInstance().getItemRenderer().getItemModelShaper().getItemModel(stack);
             if (stack.hasFoil()) model = ClientPlatformHelper.get().createdFoiledModel(model);
             return new TransformedModel(model, side == TurtleSide.LEFT ? leftTransform : rightTransform);

projects/common-api/src/main/java/dan200/computercraft/api/pocket/IPocketAccess.java

@@ -4,15 +4,12 @@
 
 package dan200.computercraft.api.pocket;
 
-import dan200.computercraft.api.peripheral.IPeripheral;
 import dan200.computercraft.api.upgrades.UpgradeBase;
 import net.minecraft.nbt.CompoundTag;
-import net.minecraft.resources.ResourceLocation;
 import net.minecraft.world.entity.Entity;
 import net.minecraft.world.item.ItemStack;
 
 import javax.annotation.Nullable;
-import java.util.Map;
 
 /**
  * Wrapper class for pocket computers.
@@ -90,13 +87,4 @@ public interface IPocketAccess {
      * entity} changes.
      */
     void invalidatePeripheral();
-
-    /**
-     * Get a list of all upgrades for the pocket computer.
-     *
-     * @return A collection of all upgrade names.
-     * @deprecated This is a relic of a previous API, which no longer makes sense with newer versions of ComputerCraft.
-     */
-    @Deprecated(forRemoval = true)
-    Map<ResourceLocation, IPeripheral> getUpgrades();
 }

projects/common-api/src/main/java/dan200/computercraft/api/pocket/IPocketUpgrade.java

@@ -6,6 +6,10 @@ package dan200.computercraft.api.pocket;
 
 import dan200.computercraft.api.peripheral.IPeripheral;
 import dan200.computercraft.api.upgrades.UpgradeBase;
+import dan200.computercraft.api.upgrades.UpgradeSerialiser;
+import dan200.computercraft.impl.ComputerCraftAPIService;
+import net.minecraft.core.Registry;
+import net.minecraft.resources.ResourceKey;
 import net.minecraft.world.level.Level;
 
 import javax.annotation.Nullable;
@@ -13,16 +17,46 @@ import javax.annotation.Nullable;
 /**
  * A peripheral which can be equipped to the back side of a pocket computer.
  * <p>
- * Pocket upgrades are defined in two stages. First, on creates a {@link IPocketUpgrade} subclass and corresponding
+ * Pocket upgrades are defined in two stages. First, one creates a {@link IPocketUpgrade} subclass and corresponding
- * {@link PocketUpgradeSerialiser} instance, which are then registered in a Forge registry.
+ * {@link UpgradeSerialiser} instance, which are then registered in a registry.
  * <p>
  * You then write a JSON file in your mod's {@literal data/} folder. This is then parsed when the world is loaded, and
- * the upgrade registered internally. See the documentation in {@link PocketUpgradeSerialiser} for details on this process
+ * the upgrade automatically registered. It is recommended this is done via {@linkplain PocketUpgradeDataProvider data
- * and where files should be located.
+ * generators}.
  *
- * @see PocketUpgradeSerialiser For how to register a pocket computer upgrade.
+ * <h2>Example</h2>
+ * <pre>{@code
+ * // We use Forge's DeferredRegister to register our serialiser. Fabric mods may register their serialiser directly.
+ * static final DeferredRegister<UpgradeSerialiser<? extends IPocketUpgrade>> SERIALISERS = DeferredRegister.create(IPocketUpgrade.serialiserRegistryKey(), "my_mod");
+ *
+ * // Register a new upgrade serialiser called "my_upgrade".
+ * public static final RegistryObject<UpgradeSerialiser<MyUpgrade>> MY_UPGRADE =
+ *     SERIALISERS.register("my_upgrade", () -> UpgradeSerialiser.simple(MyUpgrade::new));
+ *
+ * // Then in your constructor
+ * SERIALISERS.register(bus);
+ * }</pre>
+ * <p>
+ * We can then define a new upgrade using JSON by placing the following in
+ * {@code data/<my_mod>/computercraft/pocket_upgrades/<my_upgrade_id>.json}.
+ * <pre>{@code
+ * {
+ *     "type": my_mod:my_upgrade",
+ * }
+ * }</pre>
+ * <p>
+ * {@link PocketUpgradeDataProvider} provides a data provider to aid with generating these JSON files.
  */
 public interface IPocketUpgrade extends UpgradeBase {
+    /**
+     * The registry key for upgrade serialisers.
+     *
+     * @return The registry key.
+     */
+    static ResourceKey<Registry<UpgradeSerialiser<? extends IPocketUpgrade>>> serialiserRegistryKey() {
+        return ComputerCraftAPIService.get().pocketUpgradeRegistryId();
+    }
+
     /**
      * Creates a peripheral for the pocket computer.
      * <p>

projects/common-api/src/main/java/dan200/computercraft/api/pocket/PocketUpgradeDataProvider.java

@@ -5,6 +5,7 @@
 package dan200.computercraft.api.pocket;
 
 import dan200.computercraft.api.upgrades.UpgradeDataProvider;
+import dan200.computercraft.api.upgrades.UpgradeSerialiser;
 import net.minecraft.data.DataGenerator;
 import net.minecraft.data.PackOutput;
 
@@ -17,10 +18,11 @@ import java.util.function.Consumer;
  * {@link #addUpgrades(Consumer)} function, construct each upgrade, and pass them off to the provided consumer to
  * generate them.
  *
- * @see PocketUpgradeSerialiser
+ * @see IPocketUpgrade
+ * @see UpgradeSerialiser
  */
-public abstract class PocketUpgradeDataProvider extends UpgradeDataProvider<IPocketUpgrade, PocketUpgradeSerialiser<?>> {
+public abstract class PocketUpgradeDataProvider extends UpgradeDataProvider<IPocketUpgrade> {
     public PocketUpgradeDataProvider(PackOutput output) {
-        super(output, "Pocket Computer Upgrades", "computercraft/pocket_upgrades", PocketUpgradeSerialiser.registryId());
+        super(output, "Pocket Computer Upgrades", "computercraft/pocket_upgrades", IPocketUpgrade.serialiserRegistryKey());
     }
 }

projects/common-api/src/main/java/dan200/computercraft/api/pocket/PocketUpgradeSerialiser.java

@@ -1,79 +0,0 @@
-// SPDX-FileCopyrightText: 2021 The CC: Tweaked Developers
-//
-// SPDX-License-Identifier: MPL-2.0
-
-package dan200.computercraft.api.pocket;
-
-import dan200.computercraft.api.upgrades.UpgradeBase;
-import dan200.computercraft.api.upgrades.UpgradeSerialiser;
-import dan200.computercraft.impl.ComputerCraftAPIService;
-import dan200.computercraft.impl.upgrades.SerialiserWithCraftingItem;
-import dan200.computercraft.impl.upgrades.SimpleSerialiser;
-import net.minecraft.core.Registry;
-import net.minecraft.resources.ResourceKey;
-import net.minecraft.resources.ResourceLocation;
-import net.minecraft.world.item.ItemStack;
-import net.minecraft.world.item.crafting.SimpleCraftingRecipeSerializer;
-
-import java.util.function.BiFunction;
-import java.util.function.Function;
-
-/**
- * Reads a {@link IPocketUpgrade} from disk and reads/writes it to a network packet.
- * <p>
- * This follows the same format as {@link dan200.computercraft.api.turtle.TurtleUpgradeSerialiser} - consult the
- * documentation there for more information.
- *
- * @param <T> The type of pocket computer upgrade this is responsible for serialising.
- * @see IPocketUpgrade
- * @see PocketUpgradeDataProvider
- */
-public interface PocketUpgradeSerialiser<T extends IPocketUpgrade> extends UpgradeSerialiser<T> {
-    /**
-     * The ID for the associated registry.
-     *
-     * @return The registry key.
-     */
-    static ResourceKey<Registry<PocketUpgradeSerialiser<?>>> registryId() {
-        return ComputerCraftAPIService.get().pocketUpgradeRegistryId();
-    }
-
-    /**
-     * Create an upgrade serialiser for a simple upgrade. This is similar to a {@link SimpleCraftingRecipeSerializer},
-     * but for upgrades.
-     * <p>
-     * If you might want to vary the item, it's suggested you use {@link #simpleWithCustomItem(BiFunction)} instead.
-     *
-     * @param factory Generate a new upgrade with a specific ID.
-     * @param <T>     The type of the generated upgrade.
-     * @return The serialiser for this upgrade
-     */
-    static <T extends IPocketUpgrade> PocketUpgradeSerialiser<T> simple(Function<ResourceLocation, T> factory) {
-        final class Impl extends SimpleSerialiser<T> implements PocketUpgradeSerialiser<T> {
-            private Impl(Function<ResourceLocation, T> constructor) {
-                super(constructor);
-            }
-        }
-
-        return new Impl(factory);
-    }
-
-    /**
-     * Create an upgrade serialiser for a simple upgrade whose crafting item can be specified.
-     *
-     * @param factory Generate a new upgrade with a specific ID and crafting item. The returned upgrade's
-     *                {@link UpgradeBase#getCraftingItem()} <strong>MUST</strong> equal the provided item.
-     * @param <T>     The type of the generated upgrade.
-     * @return The serialiser for this upgrade.
-     * @see #simple(Function)  For upgrades whose crafting stack should not vary.
-     */
-    static <T extends IPocketUpgrade> PocketUpgradeSerialiser<T> simpleWithCustomItem(BiFunction<ResourceLocation, ItemStack, T> factory) {
-        final class Impl extends SerialiserWithCraftingItem<T> implements PocketUpgradeSerialiser<T> {
-            private Impl(BiFunction<ResourceLocation, ItemStack, T> factory) {
-                super(factory);
-            }
-        }
-
-        return new Impl(factory);
-    }
-}

projects/common-api/src/main/java/dan200/computercraft/api/turtle/ITurtleUpgrade.java

@@ -6,8 +6,12 @@ package dan200.computercraft.api.turtle;
 
 import dan200.computercraft.api.peripheral.IPeripheral;
 import dan200.computercraft.api.upgrades.UpgradeBase;
+import dan200.computercraft.api.upgrades.UpgradeSerialiser;
+import dan200.computercraft.impl.ComputerCraftAPIService;
 import net.minecraft.core.Direction;
+import net.minecraft.core.Registry;
 import net.minecraft.nbt.CompoundTag;
+import net.minecraft.resources.ResourceKey;
 
 import javax.annotation.Nullable;
 
@@ -16,15 +20,54 @@ import javax.annotation.Nullable;
  * peripheral.
  * <p>
  * Turtle upgrades are defined in two stages. First, one creates a {@link ITurtleUpgrade} subclass and corresponding
- * {@link TurtleUpgradeSerialiser} instance, which are then registered in a Forge registry.
+ * {@link UpgradeSerialiser} instance, which are then registered in a registry.
  * <p>
  * You then write a JSON file in your mod's {@literal data/} folder. This is then parsed when the world is loaded, and
- * the upgrade registered internally. See the documentation in {@link TurtleUpgradeSerialiser} for details on this process
+ * the upgrade automatically registered. It is recommended this is done via {@linkplain TurtleUpgradeDataProvider data
- * and where files should be located.
+ * generators}.
  *
- * @see TurtleUpgradeSerialiser For how to register a turtle upgrade.
+ * <h2>Example</h2>
+ * <pre>{@code
+ * // We use Forge's DeferredRegister to register our serialiser. Fabric mods may register their serialiser directly.
+ * static final DeferredRegister<UpgradeSerialiser<? extends ITurtleUpgrade>> SERIALISERS = DeferredRegister.create(ITurtleUpgrade.serialiserRegistryKey(), "my_mod");
+ *
+ * // Register a new upgrade serialiser called "my_upgrade".
+ * public static final RegistryObject<UpgradeSerialiser<MyUpgrade>> MY_UPGRADE =
+ *     SERIALISERS.register( "my_upgrade", () -> TurtleUpgradeSerialiser.simple( MyUpgrade::new ) );
+ *
+ * // Then in your constructor
+ * SERIALISERS.register( bus );
+ * }</pre>
+ * <p>
+ * We can then define a new upgrade using JSON by placing the following in
+ * {@literal data/<my_mod>/computercraft/turtle_upgrades/<my_upgrade_id>.json}}.
+ *
+ * <pre>{@code
+ * {
+ *     "type": my_mod:my_upgrade",
+ * }
+ * }</pre>
+ * <p>
+ * {@link TurtleUpgradeDataProvider} provides a data provider to aid with generating these JSON files.
+ * <p>
+ * Finally, we need to register a model for our upgrade, see
+ * {@link dan200.computercraft.api.client.turtle.TurtleUpgradeModeller} for more information.
+ *
+ * <pre>{@code
+ * // Register our model inside FMLClientSetupEvent
+ * ComputerCraftAPIClient.registerTurtleUpgradeModeller(MY_UPGRADE.get(), TurtleUpgradeModeller.flatItem())
+ * }</pre>
  */
 public interface ITurtleUpgrade extends UpgradeBase {
+    /**
+     * The registry key for upgrade serialisers.
+     *
+     * @return The registry key.
+     */
+    static ResourceKey<Registry<UpgradeSerialiser<? extends ITurtleUpgrade>>> serialiserRegistryKey() {
+        return ComputerCraftAPIService.get().turtleUpgradeRegistryId();
+    }
+
     /**
      * Return whether this turtle adds a tool or a peripheral to the turtle.
      *

projects/common-api/src/main/java/dan200/computercraft/api/turtle/TurtleUpgradeDataProvider.java

@@ -7,8 +7,9 @@ package dan200.computercraft.api.turtle;
 import dan200.computercraft.api.ComputerCraftAPI;
 import dan200.computercraft.api.ComputerCraftTags;
 import dan200.computercraft.api.upgrades.UpgradeDataProvider;
-import dan200.computercraft.impl.PlatformHelper;
+import dan200.computercraft.api.upgrades.UpgradeSerialiser;
-import net.minecraft.core.registries.Registries;
+import dan200.computercraft.impl.RegistryHelper;
+import net.minecraft.core.registries.BuiltInRegistries;
 import net.minecraft.data.DataGenerator;
 import net.minecraft.data.PackOutput;
 import net.minecraft.resources.ResourceLocation;
@@ -29,13 +30,13 @@ import java.util.function.Consumer;
  * {@link #addUpgrades(Consumer)} function, construct each upgrade, and pass them off to the provided consumer to
  * generate them.
  *
- * @see TurtleUpgradeSerialiser
+ * @see ITurtleUpgrade
  */
-public abstract class TurtleUpgradeDataProvider extends UpgradeDataProvider<ITurtleUpgrade, TurtleUpgradeSerialiser<?>> {
+public abstract class TurtleUpgradeDataProvider extends UpgradeDataProvider<ITurtleUpgrade> {
     private static final ResourceLocation TOOL_ID = new ResourceLocation(ComputerCraftAPI.MOD_ID, "tool");
 
     public TurtleUpgradeDataProvider(PackOutput output) {
-        super(output, "Turtle Upgrades", "computercraft/turtle_upgrades", TurtleUpgradeSerialiser.registryId());
+        super(output, "Turtle Upgrades", "computercraft/turtle_upgrades", ITurtleUpgrade.serialiserRegistryKey());
     }
 
     /**
@@ -57,7 +58,7 @@ public abstract class TurtleUpgradeDataProvider extends UpgradeDataProvider<ITur
      */
     public static class ToolBuilder {
         private final ResourceLocation id;
-        private final TurtleUpgradeSerialiser<?> serialiser;
+        private final UpgradeSerialiser<? extends ITurtleUpgrade> serialiser;
         private final Item toolItem;
         private @Nullable String adjective;
         private @Nullable Item craftingItem;
@@ -66,7 +67,7 @@ public abstract class TurtleUpgradeDataProvider extends UpgradeDataProvider<ITur
         private boolean allowEnchantments = false;
         private TurtleToolDurability consumeDurability = TurtleToolDurability.NEVER;
 
-        ToolBuilder(ResourceLocation id, TurtleUpgradeSerialiser<?> serialiser, Item toolItem) {
+        ToolBuilder(ResourceLocation id, UpgradeSerialiser<? extends ITurtleUpgrade> serialiser, Item toolItem) {
             this.id = id;
             this.serialiser = serialiser;
             this.toolItem = toolItem;
@@ -149,12 +150,12 @@ public abstract class TurtleUpgradeDataProvider extends UpgradeDataProvider<ITur
          *
          * @param add The callback given to {@link #addUpgrades(Consumer)}.
          */
-        public void add(Consumer<Upgrade<TurtleUpgradeSerialiser<?>>> add) {
+        public void add(Consumer<Upgrade<UpgradeSerialiser<? extends ITurtleUpgrade>>> add) {
             add.accept(new Upgrade<>(id, serialiser, s -> {
-                s.addProperty("item", PlatformHelper.get().getRegistryKey(Registries.ITEM, toolItem).toString());
+                s.addProperty("item", RegistryHelper.getKeyOrThrow(BuiltInRegistries.ITEM, toolItem).toString());
                 if (adjective != null) s.addProperty("adjective", adjective);
                 if (craftingItem != null) {
-                    s.addProperty("craftItem", PlatformHelper.get().getRegistryKey(Registries.ITEM, craftingItem).toString());
+                    s.addProperty("craftItem", RegistryHelper.getKeyOrThrow(BuiltInRegistries.ITEM, craftingItem).toString());
                 }
                 if (damageMultiplier != null) s.addProperty("damageMultiplier", damageMultiplier);
                 if (breakable != null) s.addProperty("breakable", breakable.location().toString());

projects/common-api/src/main/java/dan200/computercraft/api/turtle/TurtleUpgradeSerialiser.java

@@ -1,109 +0,0 @@
-// SPDX-FileCopyrightText: 2021 The CC: Tweaked Developers
-//
-// SPDX-License-Identifier: MPL-2.0
-
-package dan200.computercraft.api.turtle;
-
-import dan200.computercraft.api.upgrades.UpgradeBase;
-import dan200.computercraft.api.upgrades.UpgradeSerialiser;
-import dan200.computercraft.impl.ComputerCraftAPIService;
-import dan200.computercraft.impl.upgrades.SerialiserWithCraftingItem;
-import dan200.computercraft.impl.upgrades.SimpleSerialiser;
-import net.minecraft.core.Registry;
-import net.minecraft.resources.ResourceKey;
-import net.minecraft.resources.ResourceLocation;
-import net.minecraft.world.item.ItemStack;
-import net.minecraft.world.item.crafting.RecipeSerializer;
-import net.minecraft.world.item.crafting.SimpleCraftingRecipeSerializer;
-
-import java.util.function.BiFunction;
-import java.util.function.Function;
-
-/**
- * Reads a {@link ITurtleUpgrade} from disk and reads/writes it to a network packet.
- * <p>
- * These should be registered in a {@link Registry} while the game is loading, much like {@link RecipeSerializer}s.
- * <p>
- * If your turtle upgrade doesn't have any associated configurable parameters (like most upgrades), you can use
- * {@link #simple(Function)} or {@link #simpleWithCustomItem(BiFunction)} to create a basic upgrade serialiser.
- *
- * <h2>Example (Forge)</h2>
- * <pre>{@code
- * static final DeferredRegister<TurtleUpgradeSerialiser<?>> SERIALISERS = DeferredRegister.create( TurtleUpgradeSerialiser.TYPE, "my_mod" );
- *
- * // Register a new upgrade serialiser called "my_upgrade".
- * public static final RegistryObject<TurtleUpgradeSerialiser<MyUpgrade>> MY_UPGRADE =
- *     SERIALISERS.register( "my_upgrade", () -> TurtleUpgradeSerialiser.simple( MyUpgrade::new ) );
- *
- * // Then in your constructor
- * SERIALISERS.register( bus );
- * }</pre>
- * <p>
- * We can then define a new upgrade using JSON by placing the following in
- * {@literal data/<my_mod>/computercraft/turtle_upgrades/<my_upgrade_id>.json}}.
- *
- * <pre>{@code
- * {
- *     "type": my_mod:my_upgrade",
- * }
- * }</pre>
- * <p>
- * Finally, we need to register a model for our upgrade. The way to do this varies on mod loader, see
- * {@link dan200.computercraft.api.client.turtle.TurtleUpgradeModeller} for more information.
- * <p>
- * {@link TurtleUpgradeDataProvider} provides a data provider to aid with generating these JSON files.
- *
- * @param <T> The type of turtle upgrade this is responsible for serialising.
- * @see ITurtleUpgrade
- * @see TurtleUpgradeDataProvider
- * @see dan200.computercraft.api.client.turtle.TurtleUpgradeModeller
- */
-public interface TurtleUpgradeSerialiser<T extends ITurtleUpgrade> extends UpgradeSerialiser<T> {
-    /**
-     * The ID for the associated registry.
-     *
-     * @return The registry key.
-     */
-    static ResourceKey<Registry<TurtleUpgradeSerialiser<?>>> registryId() {
-        return ComputerCraftAPIService.get().turtleUpgradeRegistryId();
-    }
-
-    /**
-     * Create an upgrade serialiser for a simple upgrade. This is similar to a {@link SimpleCraftingRecipeSerializer},
-     * but for upgrades.
-     * <p>
-     * If you might want to vary the item, it's suggested you use {@link #simpleWithCustomItem(BiFunction)} instead.
-     *
-     * @param factory Generate a new upgrade with a specific ID.
-     * @param <T>     The type of the generated upgrade.
-     * @return The serialiser for this upgrade
-     */
-    static <T extends ITurtleUpgrade> TurtleUpgradeSerialiser<T> simple(Function<ResourceLocation, T> factory) {
-        final class Impl extends SimpleSerialiser<T> implements TurtleUpgradeSerialiser<T> {
-            private Impl(Function<ResourceLocation, T> constructor) {
-                super(constructor);
-            }
-        }
-
-        return new Impl(factory);
-    }
-
-    /**
-     * Create an upgrade serialiser for a simple upgrade whose crafting item can be specified.
-     *
-     * @param factory Generate a new upgrade with a specific ID and crafting item. The returned upgrade's
-     *                {@link UpgradeBase#getCraftingItem()} <strong>MUST</strong> equal the provided item.
-     * @param <T>     The type of the generated upgrade.
-     * @return The serialiser for this upgrade.
-     * @see #simple(Function)  For upgrades whose crafting stack should not vary.
-     */
-    static <T extends ITurtleUpgrade> TurtleUpgradeSerialiser<T> simpleWithCustomItem(BiFunction<ResourceLocation, ItemStack, T> factory) {
-        final class Impl extends SerialiserWithCraftingItem<T> implements TurtleUpgradeSerialiser<T> {
-            private Impl(BiFunction<ResourceLocation, ItemStack, T> factory) {
-                super(factory);
-            }
-        }
-
-        return new Impl(factory);
-    }
-}

projects/common-api/src/main/java/dan200/computercraft/api/upgrades/UpgradeBase.java

@@ -9,7 +9,6 @@ import dan200.computercraft.api.pocket.IPocketUpgrade;
 import dan200.computercraft.api.turtle.ITurtleAccess;
 import dan200.computercraft.api.turtle.ITurtleUpgrade;
 import dan200.computercraft.api.turtle.TurtleSide;
-import dan200.computercraft.impl.PlatformHelper;
 import net.minecraft.Util;
 import net.minecraft.nbt.CompoundTag;
 import net.minecraft.resources.ResourceLocation;
@@ -100,7 +99,7 @@ public interface UpgradeBase {
      * The default check requires that any non-capability NBT is exactly the same as the
      * crafting item, but this may be relaxed for your upgrade.
      * <p>
-     * This is based on {@code net.minecraftforge.common.crafting.StrictNBTIngredient}'s check.
+     * This is based on {@code net.neoforged.common.crafting.StrictNBTIngredient}'s check.
      *
      * @param stack The stack to check. This is guaranteed to be non-empty and have the same item as
      *              {@link #getCraftingItem()}.
@@ -111,12 +110,12 @@ public interface UpgradeBase {
 
         // A more expanded form of ItemStack.areShareTagsEqual, but allowing an empty tag to be equal to a
         // null one.
-        var shareTag = PlatformHelper.get().getShareTag(stack);
+        var tag = stack.getTag();
-        var craftingShareTag = PlatformHelper.get().getShareTag(crafting);
+        var craftingTag = crafting.getTag();
-        if (shareTag == craftingShareTag) return true;
+        if (tag == craftingTag) return true;
-        if (shareTag == null) return Objects.requireNonNull(craftingShareTag).isEmpty();
+        if (tag == null) return Objects.requireNonNull(craftingTag).isEmpty();
-        if (craftingShareTag == null) return shareTag.isEmpty();
+        if (craftingTag == null) return tag.isEmpty();
-        return shareTag.equals(craftingShareTag);
+        return tag.equals(craftingTag);
     }
 
     /**

projects/common-api/src/main/java/dan200/computercraft/api/upgrades/UpgradeDataProvider.java

@@ -6,19 +6,20 @@ package dan200.computercraft.api.upgrades;
 
 import com.google.gson.JsonObject;
 import com.google.gson.JsonParseException;
-import dan200.computercraft.api.turtle.TurtleUpgradeSerialiser;
 import dan200.computercraft.impl.PlatformHelper;
+import dan200.computercraft.impl.RegistryHelper;
 import dan200.computercraft.impl.upgrades.SerialiserWithCraftingItem;
 import dan200.computercraft.impl.upgrades.SimpleSerialiser;
 import net.minecraft.Util;
 import net.minecraft.core.Registry;
-import net.minecraft.core.registries.Registries;
+import net.minecraft.core.registries.BuiltInRegistries;
 import net.minecraft.data.CachedOutput;
 import net.minecraft.data.DataProvider;
 import net.minecraft.data.PackOutput;
 import net.minecraft.resources.ResourceKey;
 import net.minecraft.resources.ResourceLocation;
 import net.minecraft.world.item.Item;
+import org.jetbrains.annotations.ApiStatus;
 
 import javax.annotation.Nullable;
 import java.util.*;
@@ -31,31 +32,31 @@ import java.util.function.Function;
  * the other subclasses.
  *
  * @param <T> The base class of upgrades.
- * @param <R> The upgrade serialiser to register for.
  */
-public abstract class UpgradeDataProvider<T extends UpgradeBase, R extends UpgradeSerialiser<? extends T>> implements DataProvider {
+public abstract class UpgradeDataProvider<T extends UpgradeBase> implements DataProvider {
     private final PackOutput output;
     private final String name;
     private final String folder;
-    private final ResourceKey<Registry<R>> registry;
+    private final Registry<UpgradeSerialiser<? extends T>> registry;
 
     private @Nullable List<T> upgrades;
 
-    protected UpgradeDataProvider(PackOutput output, String name, String folder, ResourceKey<Registry<R>> registry) {
+    @ApiStatus.Internal
+    protected UpgradeDataProvider(PackOutput output, String name, String folder, ResourceKey<Registry<UpgradeSerialiser<? extends T>>> registry) {
         this.output = output;
         this.name = name;
         this.folder = folder;
-        this.registry = registry;
+        this.registry = RegistryHelper.getRegistry(registry);
     }
 
     /**
-     * Register an upgrade using a "simple" serialiser (e.g. {@link TurtleUpgradeSerialiser#simple(Function)}).
+     * Register an upgrade using a {@linkplain UpgradeSerialiser#simple(Function) "simple" serialiser}.
      *
      * @param id         The ID of the upgrade to create.
      * @param serialiser The simple serialiser.
      * @return The constructed upgrade, ready to be passed off to {@link #addUpgrades(Consumer)}'s consumer.
      */
-    public final Upgrade<R> simple(ResourceLocation id, R serialiser) {
+    public final Upgrade<UpgradeSerialiser<? extends T>> simple(ResourceLocation id, UpgradeSerialiser<? extends T> serialiser) {
         if (!(serialiser instanceof SimpleSerialiser)) {
             throw new IllegalStateException(serialiser + " must be a simple() seriaiser.");
         }
@@ -65,20 +66,20 @@ public abstract class UpgradeDataProvider<T extends UpgradeBase, R extends Upgra
     }
 
     /**
-     * Register an upgrade using a "simple" serialiser (e.g. {@link TurtleUpgradeSerialiser#simple(Function)}).
+     * Register an upgrade using a {@linkplain UpgradeSerialiser#simple(Function) simple serialiser}.
      *
      * @param id         The ID of the upgrade to create.
      * @param serialiser The simple serialiser.
      * @param item       The crafting upgrade for this item.
      * @return The constructed upgrade, ready to be passed off to {@link #addUpgrades(Consumer)}'s consumer.
      */
-    public final Upgrade<R> simpleWithCustomItem(ResourceLocation id, R serialiser, Item item) {
+    public final Upgrade<UpgradeSerialiser<? extends T>> simpleWithCustomItem(ResourceLocation id, UpgradeSerialiser<? extends T> serialiser, Item item) {
         if (!(serialiser instanceof SerialiserWithCraftingItem)) {
             throw new IllegalStateException(serialiser + " must be a simpleWithCustomItem() serialiser.");
         }
 
         return new Upgrade<>(id, serialiser, s ->
-            s.addProperty("item", PlatformHelper.get().getRegistryKey(Registries.ITEM, item).toString())
+            s.addProperty("item", RegistryHelper.getKeyOrThrow(BuiltInRegistries.ITEM, item).toString())
         );
     }
 
@@ -94,7 +95,7 @@ public abstract class UpgradeDataProvider<T extends UpgradeBase, R extends Upgra
      *
      * @param addUpgrade A callback used to register an upgrade.
      */
-    protected abstract void addUpgrades(Consumer<Upgrade<R>> addUpgrade);
+    protected abstract void addUpgrades(Consumer<Upgrade<UpgradeSerialiser<? extends T>>> addUpgrade);
 
     @Override
     public CompletableFuture<?> run(CachedOutput cache) {
@@ -107,7 +108,7 @@ public abstract class UpgradeDataProvider<T extends UpgradeBase, R extends Upgra
             if (!seen.add(upgrade.id())) throw new IllegalStateException("Duplicate upgrade " + upgrade.id());
 
             var json = new JsonObject();
-            json.addProperty("type", PlatformHelper.get().getRegistryKey(registry, upgrade.serialiser()).toString());
+            json.addProperty("type", RegistryHelper.getKeyOrThrow(registry, upgrade.serialiser()).toString());
             upgrade.serialise().accept(json);
 
             futures.add(DataProvider.saveStable(cache, json, base.resolve(upgrade.id().getNamespace() + "/" + folder + "/" + upgrade.id().getPath() + ".json")));
@@ -129,9 +130,9 @@ public abstract class UpgradeDataProvider<T extends UpgradeBase, R extends Upgra
         return name;
     }
 
-    public final R existingSerialiser(ResourceLocation id) {
+    public final UpgradeSerialiser<? extends T> existingSerialiser(ResourceLocation id) {
-        var result = PlatformHelper.get().getRegistryObject(registry, id);
+        var result = registry.get(id);
-        if (result == null) throw new IllegalArgumentException("No such serialiser " + registry);
+        if (result == null) throw new IllegalArgumentException("No such serialiser " + id);
         return result;
     }
 

projects/common-api/src/main/java/dan200/computercraft/api/upgrades/UpgradeSerialiser.java

@@ -5,21 +5,40 @@
 package dan200.computercraft.api.upgrades;
 
 import com.google.gson.JsonObject;
-import dan200.computercraft.api.pocket.PocketUpgradeSerialiser;
+import dan200.computercraft.api.pocket.IPocketUpgrade;
-import dan200.computercraft.api.turtle.TurtleUpgradeSerialiser;
+import dan200.computercraft.api.pocket.PocketUpgradeDataProvider;
+import dan200.computercraft.api.turtle.ITurtleUpgrade;
+import dan200.computercraft.api.turtle.TurtleUpgradeDataProvider;
+import dan200.computercraft.impl.upgrades.SerialiserWithCraftingItem;
+import dan200.computercraft.impl.upgrades.SimpleSerialiser;
+import net.minecraft.core.Registry;
 import net.minecraft.network.FriendlyByteBuf;
 import net.minecraft.resources.ResourceLocation;
+import net.minecraft.world.item.ItemStack;
+import net.minecraft.world.item.crafting.RecipeSerializer;
+import net.minecraft.world.item.crafting.SimpleCraftingRecipeSerializer;
 
+import java.util.function.BiFunction;
+import java.util.function.Function;
 
 /**
- * Base interface for upgrade serialisers. This should generally not be implemented directly, instead implementing one
+ * A serialiser for {@link ITurtleUpgrade} or {@link IPocketUpgrade}s.
- * of {@link TurtleUpgradeSerialiser} or {@link PocketUpgradeSerialiser}.
  * <p>
- * However, it may sometimes be useful to implement this if you have some shared logic between upgrade types.
+ * These should be registered in a {@link Registry} while the game is loading, much like {@link RecipeSerializer}s.
+ * <p>
+ * This interface is very similar to {@link RecipeSerializer}; each serialiser should correspond to a specific upgrade
+ * class. Upgrades are then read from JSON files in datapacks, allowing multiple instances of the upgrade to be
+ * registered.
+ * <p>
+ * If your upgrade doesn't have any associated configurable parameters (like most upgrades), you can use
+ * {@link #simple(Function)} or {@link #simpleWithCustomItem(BiFunction)} to create a basic upgrade serialiser.
+ * <p>
+ * Upgrades may be data generated via a {@link UpgradeDataProvider} (see {@link TurtleUpgradeDataProvider} and
+ * {@link PocketUpgradeDataProvider}).
  *
  * @param <T> The upgrade that this class can serialise and deserialise.
- * @see TurtleUpgradeSerialiser
+ * @see ITurtleUpgrade
- * @see PocketUpgradeSerialiser
+ * @see IPocketUpgrade
  */
 public interface UpgradeSerialiser<T extends UpgradeBase> {
     /**
@@ -49,4 +68,30 @@ public interface UpgradeSerialiser<T extends UpgradeBase> {
      */
     void toNetwork(FriendlyByteBuf buffer, T upgrade);
 
+    /**
+     * Create an upgrade serialiser for a simple upgrade. This is similar to a {@link SimpleCraftingRecipeSerializer},
+     * but for upgrades.
+     * <p>
+     * If you might want to vary the item, it's suggested you use {@link #simpleWithCustomItem(BiFunction)} instead.
+     *
+     * @param factory Generate a new upgrade with a specific ID.
+     * @param <T>     The type of the generated upgrade.
+     * @return The serialiser for this upgrade
+     */
+    static <T extends UpgradeBase> UpgradeSerialiser<T> simple(Function<ResourceLocation, T> factory) {
+        return new SimpleSerialiser<>(factory);
+    }
+
+    /**
+     * Create an upgrade serialiser for a simple upgrade whose crafting item can be specified.
+     *
+     * @param factory Generate a new upgrade with a specific ID and crafting item. The returned upgrade's
+     *                {@link UpgradeBase#getCraftingItem()} <strong>MUST</strong> equal the provided item.
+     * @param <T>     The type of the generated upgrade.
+     * @return The serialiser for this upgrade.
+     * @see #simple(Function)  For upgrades whose crafting stack should not vary.
+     */
+    static <T extends UpgradeBase> UpgradeSerialiser<T> simpleWithCustomItem(BiFunction<ResourceLocation, ItemStack, T> factory) {
+        return new SerialiserWithCraftingItem<>(factory);
+    }
 }

projects/common-api/src/main/java/dan200/computercraft/impl/ComputerCraftAPIService.java

@@ -15,10 +15,11 @@ import dan200.computercraft.api.media.MediaProvider;
 import dan200.computercraft.api.network.PacketNetwork;
 import dan200.computercraft.api.network.wired.WiredElement;
 import dan200.computercraft.api.network.wired.WiredNode;
-import dan200.computercraft.api.pocket.PocketUpgradeSerialiser;
+import dan200.computercraft.api.pocket.IPocketUpgrade;
 import dan200.computercraft.api.redstone.BundledRedstoneProvider;
+import dan200.computercraft.api.turtle.ITurtleUpgrade;
 import dan200.computercraft.api.turtle.TurtleRefuelHandler;
-import dan200.computercraft.api.turtle.TurtleUpgradeSerialiser;
+import dan200.computercraft.api.upgrades.UpgradeSerialiser;
 import net.minecraft.core.BlockPos;
 import net.minecraft.core.Direction;
 import net.minecraft.core.Registry;
@@ -67,9 +68,9 @@ public interface ComputerCraftAPIService {
 
     void registerRefuelHandler(TurtleRefuelHandler handler);
 
-    ResourceKey<Registry<TurtleUpgradeSerialiser<?>>> turtleUpgradeRegistryId();
+    ResourceKey<Registry<UpgradeSerialiser<? extends ITurtleUpgrade>>> turtleUpgradeRegistryId();
 
-    ResourceKey<Registry<PocketUpgradeSerialiser<?>>> pocketUpgradeRegistryId();
+    ResourceKey<Registry<UpgradeSerialiser<? extends IPocketUpgrade>>> pocketUpgradeRegistryId();
 
     DetailRegistry<ItemStack> getItemStackDetailRegistry();
 

projects/common-api/src/main/java/dan200/computercraft/impl/PlatformHelper.java

@@ -6,11 +6,6 @@ package dan200.computercraft.impl;
 
 import com.google.gson.JsonObject;
 import dan200.computercraft.api.upgrades.UpgradeDataProvider;
-import net.minecraft.core.Registry;
-import net.minecraft.nbt.CompoundTag;
-import net.minecraft.resources.ResourceKey;
-import net.minecraft.resources.ResourceLocation;
-import net.minecraft.world.item.ItemStack;
 import org.jetbrains.annotations.ApiStatus;
 
 import javax.annotation.Nullable;
@@ -32,39 +27,6 @@ public interface PlatformHelper {
         return instance == null ? Services.raise(PlatformHelper.class, Instance.ERROR) : instance;
     }
 
-    /**
-     * Get the unique ID for a registered object.
-     *
-     * @param registry The registry to look up this object in.
-     * @param object   The object to look up.
-     * @param <T>      The type of object the registry stores.
-     * @return The registered object's ID.
-     * @throws IllegalArgumentException If the registry or object are not registered.
-     */
-    <T> ResourceLocation getRegistryKey(ResourceKey<Registry<T>> registry, T object);
-
-    /**
-     * Look up an ID in a registry, returning the registered object.
-     *
-     * @param registry The registry to look up this object in.
-     * @param id       The ID to look up.
-     * @param <T>      The type of object the registry stores.
-     * @return The resolved registry object.
-     * @throws IllegalArgumentException If the registry or object are not registered.
-     */
-    <T> T getRegistryObject(ResourceKey<Registry<T>> registry, ResourceLocation id);
-
-    /**
-     * Get the subset of an {@link ItemStack}'s {@linkplain ItemStack#getTag() tag} which is synced to the client.
-     *
-     * @param item The stack.
-     * @return The item's tag.
-     */
-    @Nullable
-    default CompoundTag getShareTag(ItemStack item) {
-        return item.getTag();
-    }
-
     /**
      * Add a resource condition which requires a mod to be loaded. This should be used by data providers such as
      * {@link UpgradeDataProvider}.

projects/common-api/src/main/java/dan200/computercraft/impl/RegistryHelper.java

@@ -0,0 +1,49 @@
+// SPDX-FileCopyrightText: 2023 The CC: Tweaked Developers
+//
+// SPDX-License-Identifier: MPL-2.0
+
+package dan200.computercraft.impl;
+
+import net.minecraft.core.Registry;
+import net.minecraft.core.registries.BuiltInRegistries;
+import net.minecraft.resources.ResourceKey;
+import net.minecraft.resources.ResourceLocation;
+import org.jetbrains.annotations.ApiStatus;
+
+/**
+ * Additioanl functions for working with {@linkplain Registry registries}.
+ */
+@ApiStatus.Internal
+public final class RegistryHelper {
+    private RegistryHelper() {
+    }
+
+    /**
+     * Find a registry from a {@link ResourceKey}, throwing if it does not exist.
+     *
+     * @param id  The id of the registry.
+     * @param <T> The contents of the registry
+     * @return The associated registry.
+     */
+    @SuppressWarnings("unchecked")
+    public static <T> Registry<T> getRegistry(ResourceKey<Registry<T>> id) {
+        var registry = (Registry<T>) BuiltInRegistries.REGISTRY.get(id.location());
+        if (registry == null) throw new IllegalArgumentException("Unknown registry " + id);
+        return registry;
+    }
+
+    /**
+     * Get the key of a registry entry, throwing if it is not registered.
+     *
+     * @param registry The registry to look up in.
+     * @param object   The object to look up.
+     * @param <T>      The type of this registry.
+     * @return The ID of this object
+     * @see Registry#getResourceKey(Object)
+     */
+    public static <T> ResourceLocation getKeyOrThrow(Registry<T> registry, T object) {
+        var key = registry.getResourceKey(object);
+        if (key.isEmpty()) throw new IllegalArgumentException(object + " was not registered in " + registry.key());
+        return key.get().location();
+    }
+}

projects/common-api/src/main/java/dan200/computercraft/impl/upgrades/SerialiserWithCraftingItem.java

@@ -23,27 +23,27 @@ import java.util.function.BiFunction;
  * @param <T> The upgrade that this class can serialise and deserialise.
  */
 @ApiStatus.Internal
-public abstract class SerialiserWithCraftingItem<T extends UpgradeBase> implements UpgradeSerialiser<T> {
+public final class SerialiserWithCraftingItem<T extends UpgradeBase> implements UpgradeSerialiser<T> {
     private final BiFunction<ResourceLocation, ItemStack, T> factory;
 
-    protected SerialiserWithCraftingItem(BiFunction<ResourceLocation, ItemStack, T> factory) {
+    public SerialiserWithCraftingItem(BiFunction<ResourceLocation, ItemStack, T> factory) {
         this.factory = factory;
     }
 
     @Override
-    public final T fromJson(ResourceLocation id, JsonObject object) {
+    public T fromJson(ResourceLocation id, JsonObject object) {
         var item = GsonHelper.getAsItem(object, "item");
         return factory.apply(id, new ItemStack(item));
     }
 
     @Override
-    public final T fromNetwork(ResourceLocation id, FriendlyByteBuf buffer) {
+    public T fromNetwork(ResourceLocation id, FriendlyByteBuf buffer) {
         var item = buffer.readItem();
         return factory.apply(id, item);
     }
 
     @Override
-    public final void toNetwork(FriendlyByteBuf buffer, T upgrade) {
+    public void toNetwork(FriendlyByteBuf buffer, T upgrade) {
         buffer.writeItem(upgrade.getCraftingItem());
     }
 }

projects/common-api/src/main/java/dan200/computercraft/impl/upgrades/SimpleSerialiser.java

@@ -21,7 +21,7 @@ import java.util.function.Function;
  * @param <T> The upgrade that this class can serialise and deserialise.
  */
 @ApiStatus.Internal
-public abstract class SimpleSerialiser<T extends UpgradeBase> implements UpgradeSerialiser<T> {
+public final class SimpleSerialiser<T extends UpgradeBase> implements UpgradeSerialiser<T> {
     private final Function<ResourceLocation, T> constructor;
 
     public SimpleSerialiser(Function<ResourceLocation, T> constructor) {
@@ -29,16 +29,16 @@ public abstract class SimpleSerialiser<T extends UpgradeBase> implements Upgrade
     }
 
     @Override
-    public final T fromJson(ResourceLocation id, JsonObject object) {
+    public T fromJson(ResourceLocation id, JsonObject object) {
         return constructor.apply(id);
     }
 
     @Override
-    public final T fromNetwork(ResourceLocation id, FriendlyByteBuf buffer) {
+    public T fromNetwork(ResourceLocation id, FriendlyByteBuf buffer) {
         return constructor.apply(id);
     }
 
     @Override
-    public final void toNetwork(FriendlyByteBuf buffer, T upgrade) {
+    public void toNetwork(FriendlyByteBuf buffer, T upgrade) {
     }
 }

projects/common/src/client/java/dan200/computercraft/client/ClientHooks.java

@@ -108,7 +108,7 @@ public final class ClientHooks {
      */
     public static void addBlockDebugInfo(Consumer<String> addText) {
         var minecraft = Minecraft.getInstance();
-        if (!minecraft.options.renderDebug || minecraft.level == null) return;
+        if (!minecraft.getDebugOverlay().showDebugScreen() || minecraft.level == null) return;
         if (minecraft.hitResult == null || minecraft.hitResult.getType() != HitResult.Type.BLOCK) return;
 
         var tile = minecraft.level.getBlockEntity(((BlockHitResult) minecraft.hitResult).getBlockPos());
@@ -138,7 +138,7 @@ public final class ClientHooks {
      * @param addText A callback which adds a single line of text.
      */
     public static void addGameDebugInfo(Consumer<String> addText) {
-        if (MonitorBlockEntityRenderer.hasRenderedThisFrame() && Minecraft.getInstance().options.renderDebug) {
+        if (MonitorBlockEntityRenderer.hasRenderedThisFrame() && Minecraft.getInstance().getDebugOverlay().showDebugScreen()) {
             addText.accept("[CC:T] Monitor renderer: " + MonitorBlockEntityRenderer.currentRenderer());
         }
     }

projects/common/src/client/java/dan200/computercraft/client/ClientRegistry.java

@@ -31,6 +31,8 @@ import net.minecraft.Util;
 import net.minecraft.client.Minecraft;
 import net.minecraft.client.color.item.ItemColor;
 import net.minecraft.client.gui.screens.MenuScreens;
+import net.minecraft.client.gui.screens.Screen;
+import net.minecraft.client.gui.screens.inventory.MenuAccess;
 import net.minecraft.client.multiplayer.ClientLevel;
 import net.minecraft.client.renderer.ShaderInstance;
 import net.minecraft.client.renderer.blockentity.BlockEntityRendererProvider;
@@ -42,6 +44,8 @@ import net.minecraft.resources.ResourceLocation;
 import net.minecraft.server.packs.resources.PreparableReloadListener;
 import net.minecraft.server.packs.resources.ResourceProvider;
 import net.minecraft.world.entity.LivingEntity;
+import net.minecraft.world.inventory.AbstractContainerMenu;
+import net.minecraft.world.inventory.MenuType;
 import net.minecraft.world.item.Item;
 import net.minecraft.world.item.ItemStack;
 import net.minecraft.world.level.ItemLike;
@@ -79,17 +83,6 @@ public final class ClientRegistry {
      * Register any client-side objects which must be done on the main thread.
      */
     public static void registerMainThread() {
-        MenuScreens.<AbstractComputerMenu, ComputerScreen<AbstractComputerMenu>>register(ModRegistry.Menus.COMPUTER.get(), ComputerScreen::new);
-        MenuScreens.<AbstractComputerMenu, ComputerScreen<AbstractComputerMenu>>register(ModRegistry.Menus.POCKET_COMPUTER.get(), ComputerScreen::new);
-        MenuScreens.<AbstractComputerMenu, NoTermComputerScreen<AbstractComputerMenu>>register(ModRegistry.Menus.POCKET_COMPUTER_NO_TERM.get(), NoTermComputerScreen::new);
-        MenuScreens.register(ModRegistry.Menus.TURTLE.get(), TurtleScreen::new);
-
-        MenuScreens.register(ModRegistry.Menus.PRINTER.get(), PrinterScreen::new);
-        MenuScreens.register(ModRegistry.Menus.DISK_DRIVE.get(), DiskDriveScreen::new);
-        MenuScreens.register(ModRegistry.Menus.PRINTOUT.get(), PrintoutScreen::new);
-
-        MenuScreens.<ViewComputerMenu, ComputerScreen<ViewComputerMenu>>register(ModRegistry.Menus.VIEW_COMPUTER.get(), ComputerScreen::new);
-
         registerItemProperty("state",
             new UnclampedPropertyFunction((stack, world, player, random) -> ClientPocketComputers.get(stack).getState().ordinal()),
             ModRegistry.Items.POCKET_COMPUTER_NORMAL, ModRegistry.Items.POCKET_COMPUTER_ADVANCED
@@ -100,6 +93,23 @@ public final class ClientRegistry {
         );
     }
 
+    public static void registerMenuScreens(RegisterMenuScreen register) {
+        register.<AbstractComputerMenu, ComputerScreen<AbstractComputerMenu>>register(ModRegistry.Menus.COMPUTER.get(), ComputerScreen::new);
+        register.<AbstractComputerMenu, ComputerScreen<AbstractComputerMenu>>register(ModRegistry.Menus.POCKET_COMPUTER.get(), ComputerScreen::new);
+        register.<AbstractComputerMenu, NoTermComputerScreen<AbstractComputerMenu>>register(ModRegistry.Menus.POCKET_COMPUTER_NO_TERM.get(), NoTermComputerScreen::new);
+        register.register(ModRegistry.Menus.TURTLE.get(), TurtleScreen::new);
+
+        register.register(ModRegistry.Menus.PRINTER.get(), PrinterScreen::new);
+        register.register(ModRegistry.Menus.DISK_DRIVE.get(), DiskDriveScreen::new);
+        register.register(ModRegistry.Menus.PRINTOUT.get(), PrintoutScreen::new);
+
+        register.<ViewComputerMenu, ComputerScreen<ViewComputerMenu>>register(ModRegistry.Menus.VIEW_COMPUTER.get(), ComputerScreen::new);
+    }
+
+    public interface RegisterMenuScreen {
+        <M extends AbstractContainerMenu, U extends Screen & MenuAccess<M>> void register(MenuType<? extends M> type, MenuScreens.ScreenConstructor<M, U> factory);
+    }
+
     public static void registerTurtleModellers(RegisterTurtleUpgradeModeller register) {
         register.register(ModRegistry.TurtleSerialisers.SPEAKER.get(), TurtleUpgradeModeller.sided(
             new ResourceLocation(ComputerCraftAPI.MOD_ID, "block/turtle_speaker_left"),

projects/common/src/client/java/dan200/computercraft/client/gui/AbstractComputerScreen.java

@@ -125,7 +125,6 @@ public abstract class AbstractComputerScreen<T extends AbstractComputerMenu> ext
 
     @Override
     public void render(GuiGraphics graphics, int mouseX, int mouseY, float partialTicks) {
-        renderBackground(graphics);
         super.render(graphics, mouseX, mouseY, partialTicks);
         renderTooltip(graphics, mouseX, mouseY);
     }

projects/common/src/client/java/dan200/computercraft/client/gui/DiskDriveScreen.java

@@ -28,7 +28,6 @@ public class DiskDriveScreen extends AbstractContainerScreen<DiskDriveMenu> {
 
     @Override
     public void render(GuiGraphics graphics, int mouseX, int mouseY, float partialTicks) {
-        renderBackground(graphics);
         super.render(graphics, mouseX, mouseY, partialTicks);
         renderTooltip(graphics, mouseX, mouseY);
     }

projects/common/src/client/java/dan200/computercraft/client/gui/ItemToast.java

@@ -9,6 +9,7 @@ import net.minecraft.client.gui.GuiGraphics;
 import net.minecraft.client.gui.components.toasts.Toast;
 import net.minecraft.client.gui.components.toasts.ToastComponent;
 import net.minecraft.network.chat.Component;
+import net.minecraft.resources.ResourceLocation;
 import net.minecraft.util.FormattedCharSequence;
 import net.minecraft.world.item.ItemStack;
 
@@ -18,6 +19,7 @@ import java.util.List;
  * A {@link Toast} implementation which displays an arbitrary message along with an optional {@link ItemStack}.
  */
 public class ItemToast implements Toast {
+    private static final ResourceLocation TEXTURE = new ResourceLocation("toast/recipe");
     public static final Object TRANSFER_NO_RESPONSE_TOKEN = new Object();
 
     private static final long DISPLAY_TIME = 7000L;
@@ -79,7 +81,7 @@ public class ItemToast implements Toast {
         }
 
         if (width == 160 && message.size() <= 1) {
-            graphics.blit(TEXTURE, 0, 0, 0, 64, width, height());
+            graphics.blitSprite(TEXTURE, 0, 0, width, height());
         } else {
 
             var height = height();
@@ -109,14 +111,14 @@ public class ItemToast implements Toast {
     }
 
     private static void renderBackgroundRow(GuiGraphics graphics, int x, int u, int y, int height) {
-        var leftOffset = 5;
+        var leftOffset = u == 0 ? 20 : 5;
         var rightOffset = Math.min(60, x - leftOffset);
 
-        graphics.blit(TEXTURE, 0, y, 0, 32 + u, leftOffset, height);
+        graphics.blitSprite(TEXTURE, 160, 32, 0, u, 0, y, leftOffset, height);
         for (var k = leftOffset; k < x - rightOffset; k += 64) {
-            graphics.blit(TEXTURE, k, y, 32, 32 + u, Math.min(64, x - k - rightOffset), height);
+            graphics.blitSprite(TEXTURE, 160, 32, 32, u, k, y, Math.min(64, x - k - rightOffset), height);
         }
 
-        graphics.blit(TEXTURE, x - rightOffset, y, 160 - rightOffset, 32 + u, rightOffset, height);
+        graphics.blitSprite(TEXTURE, 160, 32, 160 - rightOffset, u, x - rightOffset, y, rightOffset, height);
     }
 }

projects/common/src/client/java/dan200/computercraft/client/gui/NoTermComputerScreen.java

@@ -63,9 +63,9 @@ public class NoTermComputerScreen<T extends AbstractComputerMenu> extends Screen
     }
 
     @Override
-    public boolean mouseScrolled(double pMouseX, double pMouseY, double pDelta) {
+    public boolean mouseScrolled(double mouseX, double mouseY, double scrollX, double scrollY) {
-        minecraft.player.getInventory().swapPaint(pDelta);
+        minecraft.player.getInventory().swapPaint(scrollX);
-        return super.mouseScrolled(pMouseX, pMouseY, pDelta);
+        return super.mouseScrolled(mouseX, mouseY, scrollX, scrollY);
     }
 
     @Override

projects/common/src/client/java/dan200/computercraft/client/gui/OptionScreen.java

@@ -86,8 +86,6 @@ public final class OptionScreen extends Screen {
 
     @Override
     public void render(GuiGraphics graphics, int mouseX, int mouseY, float partialTicks) {
-        renderBackground(graphics);
-
         // Render the actual texture.
         graphics.blit(BACKGROUND, x, y, 0, 0, innerWidth, PADDING);
         graphics.blit(BACKGROUND,

projects/common/src/client/java/dan200/computercraft/client/gui/PrinterScreen.java

@@ -30,7 +30,6 @@ public class PrinterScreen extends AbstractContainerScreen<PrinterMenu> {
 
     @Override
     public void render(GuiGraphics graphics, int mouseX, int mouseY, float partialTicks) {
-        renderBackground(graphics);
         super.render(graphics, mouseX, mouseY, partialTicks);
         renderTooltip(graphics, mouseX, mouseY);
     }

projects/common/src/client/java/dan200/computercraft/client/gui/PrintoutScreen.java

@@ -64,15 +64,15 @@ public class PrintoutScreen extends AbstractContainerScreen<HeldItemMenu> {
     }
 
     @Override
-    public boolean mouseScrolled(double x, double y, double delta) {
+    public boolean mouseScrolled(double x, double y, double deltaX, double deltaY) {
-        if (super.mouseScrolled(x, y, delta)) return true;
+        if (super.mouseScrolled(x, y, deltaX, deltaY)) return true;
-        if (delta < 0) {
+        if (deltaX < 0) {
             // Scroll up goes to the next page
             if (page < pages - 1) page++;
             return true;
         }
 
-        if (delta > 0) {
+        if (deltaX > 0) {
             // Scroll down goes to the previous page
             if (page > 0) page--;
             return true;
@@ -91,14 +91,12 @@ public class PrintoutScreen extends AbstractContainerScreen<HeldItemMenu> {
     }
 
     @Override
-    public void render(GuiGraphics graphics, int mouseX, int mouseY, float partialTicks) {
+    public void renderBackground(GuiGraphics graphics, int mouseX, int mouseY, float partialTicks) {
         // We must take the background further back in order to not overlap with our printed pages.
         graphics.pose().pushPose();
         graphics.pose().translate(0, 0, -1);
-        renderBackground(graphics);
+        super.renderBackground(graphics, mouseX, mouseY, partialTicks);
         graphics.pose().popPose();
-
-        super.render(graphics, mouseX, mouseY, partialTicks);
     }
 
     @Override

projects/common/src/client/java/dan200/computercraft/client/gui/widgets/DynamicImageButton.java

@@ -43,6 +43,10 @@ public class DynamicImageButton extends Button {
 
     @Override
     public void renderWidget(GuiGraphics graphics, int mouseX, int mouseY, float partialTicks) {
+        var message = this.message.get();
+        setMessage(message.message());
+        setTooltip(message.tooltip());
+
         var texture = this.texture.get(isHoveredOrFocused());
 
         RenderSystem.disableDepthTest();
@@ -50,14 +54,6 @@ public class DynamicImageButton extends Button {
         RenderSystem.enableDepthTest();
     }
 
-    @Override
-    public void render(GuiGraphics graphics, int mouseX, int mouseY, float partialTicks) {
-        var message = this.message.get();
-        setMessage(message.message());
-        setTooltip(message.tooltip());
-        super.render(graphics, mouseX, mouseY, partialTicks);
-    }
-
     public record HintedMessage(Component message, Tooltip tooltip) {
         public HintedMessage(Component message, @Nullable Component hint) {
             this(

projects/common/src/client/java/dan200/computercraft/client/gui/widgets/TerminalWidget.java

@@ -195,7 +195,7 @@ public class TerminalWidget extends AbstractWidget {
     }
 
     @Override
-    public boolean mouseScrolled(double mouseX, double mouseY, double delta) {
+    public boolean mouseScrolled(double mouseX, double mouseY, double delta, double deltaY) {
         if (!inTermRegion(mouseX, mouseY)) return false;
         if (!hasMouseSupport() || delta == 0) return false;
 

projects/common/src/client/java/dan200/computercraft/client/platform/ClientPlatformHelper.java

@@ -11,7 +11,7 @@ import net.minecraft.client.renderer.MultiBufferSource;
 import net.minecraft.client.resources.model.BakedModel;
 import net.minecraft.core.BlockPos;
 import net.minecraft.network.protocol.Packet;
-import net.minecraft.network.protocol.game.ServerGamePacketListener;
+import net.minecraft.network.protocol.common.ServerCommonPacketListener;
 import net.minecraft.sounds.SoundEvent;
 
 import javax.annotation.Nullable;
@@ -27,7 +27,7 @@ public interface ClientPlatformHelper extends dan200.computercraft.impl.client.C
      * @param message The messsge to convert.
      * @return The converted message.
      */
-    Packet<ServerGamePacketListener> createPacket(NetworkMessage<ServerNetworkContext> message);
+    Packet<ServerCommonPacketListener> createPacket(NetworkMessage<ServerNetworkContext> message);
 
     /**
      * Render a {@link BakedModel}, using any loader-specific hooks.

projects/common/src/client/java/dan200/computercraft/client/render/SpriteRenderer.java

@@ -125,10 +125,10 @@ public class SpriteRenderer {
     }
 
     public static float u(TextureAtlasSprite sprite, int x, int width) {
-        return sprite.getU((double) x / width * 16);
+        return sprite.getU((float) x / width);
     }
 
     public static float v(TextureAtlasSprite sprite, int y, int height) {
-        return sprite.getV((double) y / height * 16);
+        return sprite.getV((float) y / height);
     }
 }

projects/common/src/client/java/dan200/computercraft/client/render/monitor/MonitorBlockEntityRenderer.java

@@ -9,6 +9,7 @@ import com.mojang.blaze3d.platform.MemoryTracker;
 import com.mojang.blaze3d.systems.RenderSystem;
 import com.mojang.blaze3d.vertex.*;
 import com.mojang.math.Axis;
+import dan200.computercraft.annotations.ForgeOverride;
 import dan200.computercraft.client.FrameInfo;
 import dan200.computercraft.client.integration.ShaderMod;
 import dan200.computercraft.client.render.RenderTypes;
@@ -25,6 +26,7 @@ import dan200.computercraft.shared.util.DirectionUtil;
 import net.minecraft.client.renderer.MultiBufferSource;
 import net.minecraft.client.renderer.blockentity.BlockEntityRenderer;
 import net.minecraft.client.renderer.blockentity.BlockEntityRendererProvider;
+import net.minecraft.world.phys.AABB;
 import org.joml.Matrix3f;
 import org.joml.Matrix4f;
 import org.lwjgl.opengl.GL11;
@@ -255,6 +257,11 @@ public class MonitorBlockEntityRenderer implements BlockEntityRenderer<MonitorBl
         return Config.monitorDistance;
     }
 
+    @ForgeOverride
+    public AABB getRenderBoundingBox(MonitorBlockEntity monitor) {
+        return monitor.getRenderBoundingBox();
+    }
+
     /**
      * Determine if any monitors were rendered this frame.
      *

projects/common/src/client/java/dan200/computercraft/client/turtle/TurtleModemModeller.java

@@ -10,6 +10,7 @@ import dan200.computercraft.api.client.turtle.TurtleUpgradeModeller;
 import dan200.computercraft.api.turtle.ITurtleAccess;
 import dan200.computercraft.api.turtle.TurtleSide;
 import dan200.computercraft.shared.turtle.upgrades.TurtleModem;
+import net.minecraft.nbt.CompoundTag;
 import net.minecraft.resources.ResourceLocation;
 import org.jetbrains.annotations.Nullable;
 
@@ -40,7 +41,7 @@ public class TurtleModemModeller implements TurtleUpgradeModeller<TurtleModem> {
     }
 
     @Override
-    public TransformedModel getModel(TurtleModem upgrade, @Nullable ITurtleAccess turtle, TurtleSide side) {
+    public TransformedModel getModel(TurtleModem upgrade, @Nullable ITurtleAccess turtle, TurtleSide side, CompoundTag data) {
         var active = false;
         if (turtle != null) {
             var turtleNBT = turtle.getUpgradeNBTData(side);

projects/common/src/client/java/dan200/computercraft/client/turtle/TurtleUpgradeModellers.java

@@ -10,15 +10,13 @@ import dan200.computercraft.api.client.turtle.TurtleUpgradeModeller;
 import dan200.computercraft.api.turtle.ITurtleAccess;
 import dan200.computercraft.api.turtle.ITurtleUpgrade;
 import dan200.computercraft.api.turtle.TurtleSide;
-import dan200.computercraft.api.turtle.TurtleUpgradeSerialiser;
+import dan200.computercraft.api.upgrades.UpgradeSerialiser;
-import dan200.computercraft.impl.PlatformHelper;
+import dan200.computercraft.impl.RegistryHelper;
 import dan200.computercraft.impl.TurtleUpgrades;
 import dan200.computercraft.impl.UpgradeManager;
 import net.minecraft.client.Minecraft;
 import net.minecraft.nbt.CompoundTag;
 import net.minecraft.resources.ResourceLocation;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 
 import java.util.Map;
 import java.util.WeakHashMap;
@@ -29,12 +27,10 @@ import java.util.stream.Stream;
  * A registry of {@link TurtleUpgradeModeller}s.
  */
 public final class TurtleUpgradeModellers {
-    private static final Logger LOG = LoggerFactory.getLogger(TurtleUpgradeModellers.class);
+    private static final TurtleUpgradeModeller<ITurtleUpgrade> NULL_TURTLE_MODELLER = (upgrade, turtle, side, data) ->
-
-    private static final TurtleUpgradeModeller<ITurtleUpgrade> NULL_TURTLE_MODELLER = (upgrade, turtle, side) ->
         new TransformedModel(Minecraft.getInstance().getModelManager().getMissingModel(), Transformation.identity());
 
-    private static final Map<TurtleUpgradeSerialiser<?>, TurtleUpgradeModeller<?>> turtleModels = new ConcurrentHashMap<>();
+    private static final Map<UpgradeSerialiser<? extends ITurtleUpgrade>, TurtleUpgradeModeller<?>> turtleModels = new ConcurrentHashMap<>();
     private static volatile boolean fetchedModels;
 
     /**
@@ -48,15 +44,12 @@ public final class TurtleUpgradeModellers {
     private TurtleUpgradeModellers() {
     }
 
-    public static <T extends ITurtleUpgrade> void register(TurtleUpgradeSerialiser<T> serialiser, TurtleUpgradeModeller<T> modeller) {
+    public static <T extends ITurtleUpgrade> void register(UpgradeSerialiser<T> serialiser, TurtleUpgradeModeller<T> modeller) {
         if (fetchedModels) {
-            // TODO(1.20.4): Replace with an error.
+            throw new IllegalStateException(String.format(
-            LOG.warn(
+                "Turtle upgrade serialiser %s must be registered before models are baked.",
-                "Turtle upgrade serialiser {} was registered too late, its models may not be loaded correctly. If you are " +
+                RegistryHelper.getKeyOrThrow(RegistryHelper.getRegistry(ITurtleUpgrade.serialiserRegistryKey()), serialiser)
-                    "the mod author, you may be using a deprecated API - see https://github.com/cc-tweaked/CC-Tweaked/pull/1684 " +
+            ));
-                    "for further information.",
-                PlatformHelper.get().getRegistryKey(TurtleUpgradeSerialiser.registryId(), serialiser)
-            );
         }
 
         if (turtleModels.putIfAbsent(serialiser, modeller) != null) {
@@ -67,13 +60,13 @@ public final class TurtleUpgradeModellers {
     public static TransformedModel getModel(ITurtleUpgrade upgrade, ITurtleAccess access, TurtleSide side) {
         @SuppressWarnings("unchecked")
         var modeller = (TurtleUpgradeModeller<ITurtleUpgrade>) modelCache.computeIfAbsent(upgrade, TurtleUpgradeModellers::getModeller);
-        return modeller.getModel(upgrade, access, side);
+        return modeller.getModel(upgrade, access, side, access.getUpgradeNBTData(side));
     }
 
     public static TransformedModel getModel(ITurtleUpgrade upgrade, CompoundTag data, TurtleSide side) {
         @SuppressWarnings("unchecked")
         var modeller = (TurtleUpgradeModeller<ITurtleUpgrade>) modelCache.computeIfAbsent(upgrade, TurtleUpgradeModellers::getModeller);
-        return modeller.getModel(upgrade, data, side);
+        return modeller.getModel(upgrade, null, side, data);
     }
 
     private static TurtleUpgradeModeller<?> getModeller(ITurtleUpgrade upgradeA) {

projects/common/src/main/java/dan200/computercraft/data/LanguageProvider.java

@@ -17,13 +17,12 @@ import dan200.computercraft.shared.computer.metrics.basic.Aggregate;
 import dan200.computercraft.shared.computer.metrics.basic.AggregatedMetric;
 import dan200.computercraft.shared.config.ConfigFile;
 import dan200.computercraft.shared.config.ConfigSpec;
-import dan200.computercraft.shared.platform.RegistryWrappers;
+import net.minecraft.core.registries.BuiltInRegistries;
 import net.minecraft.data.CachedOutput;
 import net.minecraft.data.DataProvider;
 import net.minecraft.data.PackOutput;
 import net.minecraft.tags.TagKey;
 import net.minecraft.world.item.Item;
-import net.minecraft.world.level.block.Block;
 
 import java.util.HashMap;
 import java.util.Map;
@@ -272,12 +271,12 @@ public final class LanguageProvider implements DataProvider {
 
     private Stream<String> getExpectedKeys() {
         return Stream.of(
-            RegistryWrappers.BLOCKS.stream()
+            BuiltInRegistries.BLOCK.holders()
-                .filter(x -> RegistryWrappers.BLOCKS.getKey(x).getNamespace().equals(ComputerCraftAPI.MOD_ID))
+                .filter(x -> x.key().location().getNamespace().equals(ComputerCraftAPI.MOD_ID))
-                .map(Block::getDescriptionId),
+                .map(x -> x.value().getDescriptionId()),
-            RegistryWrappers.ITEMS.stream()
+            BuiltInRegistries.ITEM.holders()
-                .filter(x -> RegistryWrappers.ITEMS.getKey(x).getNamespace().equals(ComputerCraftAPI.MOD_ID))
+                .filter(x -> x.key().location().getNamespace().equals(ComputerCraftAPI.MOD_ID))
-                .map(Item::getDescriptionId),
+                .map(x -> x.value().getDescriptionId()),
             turtleUpgrades.getGeneratedUpgrades().stream().map(UpgradeBase::getUnlocalisedAdjective),
             pocketUpgrades.getGeneratedUpgrades().stream().map(UpgradeBase::getUnlocalisedAdjective),
             Metric.metrics().values().stream().map(x -> AggregatedMetric.TRANSLATION_PREFIX + x.name() + ".name"),

projects/common/src/main/java/dan200/computercraft/data/ModelProvider.java

@@ -5,8 +5,9 @@
 package dan200.computercraft.data;
 
 import com.google.gson.JsonElement;
-import dan200.computercraft.shared.platform.RegistryWrappers;
+import dan200.computercraft.impl.RegistryHelper;
 import net.minecraft.Util;
+import net.minecraft.core.registries.BuiltInRegistries;
 import net.minecraft.data.CachedOutput;
 import net.minecraft.data.DataProvider;
 import net.minecraft.data.PackOutput;
@@ -67,7 +68,7 @@ public class ModelProvider implements DataProvider {
         blocks.accept(new BlockModelGenerators(addBlockState, addModel, explicitItems::add));
         items.accept(new ItemModelGenerators(addModel));
 
-        for (var block : RegistryWrappers.BLOCKS) {
+        for (var block : BuiltInRegistries.BLOCK) {
             if (!blockStates.containsKey(block)) continue;
 
             var item = Item.BY_BLOCK.get(block);
@@ -80,7 +81,7 @@ public class ModelProvider implements DataProvider {
         }
 
         List<CompletableFuture<?>> futures = new ArrayList<>();
-        saveCollection(output, futures, blockStates, x -> blockStatePath.json(RegistryWrappers.BLOCKS.getKey(x)));
+        saveCollection(output, futures, blockStates, x -> blockStatePath.json(RegistryHelper.getKeyOrThrow(BuiltInRegistries.BLOCK, x)));
         saveCollection(output, futures, models, modelPath::json);
         return Util.sequenceFailFast(futures);
     }

projects/common/src/main/java/dan200/computercraft/data/PocketUpgradeProvider.java

@@ -5,8 +5,9 @@
 package dan200.computercraft.data;
 
 import dan200.computercraft.api.ComputerCraftAPI;
+import dan200.computercraft.api.pocket.IPocketUpgrade;
 import dan200.computercraft.api.pocket.PocketUpgradeDataProvider;
-import dan200.computercraft.api.pocket.PocketUpgradeSerialiser;
+import dan200.computercraft.api.upgrades.UpgradeSerialiser;
 import net.minecraft.data.PackOutput;
 import net.minecraft.resources.ResourceLocation;
 
@@ -21,7 +22,7 @@ class PocketUpgradeProvider extends PocketUpgradeDataProvider {
     }
 
     @Override
-    protected void addUpgrades(Consumer<Upgrade<PocketUpgradeSerialiser<?>>> addUpgrade) {
+    protected void addUpgrades(Consumer<Upgrade<UpgradeSerialiser<? extends IPocketUpgrade>>> addUpgrade) {
         addUpgrade.accept(simpleWithCustomItem(id("speaker"), PocketUpgradeSerialisers.SPEAKER.get(), Items.SPEAKER.get()));
         simpleWithCustomItem(id("wireless_modem_normal"), PocketUpgradeSerialisers.WIRELESS_MODEM_NORMAL.get(), Items.WIRELESS_MODEM_NORMAL.get()).add(addUpgrade);
         simpleWithCustomItem(id("wireless_modem_advanced"), PocketUpgradeSerialisers.WIRELESS_MODEM_ADVANCED.get(), Items.WIRELESS_MODEM_ADVANCED.get()).add(addUpgrade);

projects/common/src/main/java/dan200/computercraft/data/RecipeProvider.java

@@ -5,34 +5,56 @@
 package dan200.computercraft.data;
 
 import com.google.gson.JsonObject;
+import com.google.gson.JsonParseException;
 import com.mojang.authlib.GameProfile;
+import com.mojang.serialization.JsonOps;
 import dan200.computercraft.api.ComputerCraftAPI;
 import dan200.computercraft.api.pocket.PocketUpgradeDataProvider;
 import dan200.computercraft.api.turtle.TurtleUpgradeDataProvider;
 import dan200.computercraft.api.upgrades.UpgradeData;
 import dan200.computercraft.core.util.Colour;
+import dan200.computercraft.data.recipe.ShapedSpecBuilder;
+import dan200.computercraft.data.recipe.ShapelessSpecBuilder;
+import dan200.computercraft.impl.RegistryHelper;
 import dan200.computercraft.shared.ModRegistry;
-import dan200.computercraft.shared.common.IColouredItem;
+import dan200.computercraft.shared.common.ClearColourRecipe;
+import dan200.computercraft.shared.common.ColourableRecipe;
+import dan200.computercraft.shared.computer.recipe.ComputerUpgradeRecipe;
+import dan200.computercraft.shared.media.items.DiskItem;
+import dan200.computercraft.shared.media.recipes.DiskRecipe;
+import dan200.computercraft.shared.media.recipes.PrintoutRecipe;
 import dan200.computercraft.shared.platform.PlatformHelper;
 import dan200.computercraft.shared.platform.RecipeIngredients;
-import dan200.computercraft.shared.platform.RegistryWrappers;
 import dan200.computercraft.shared.pocket.items.PocketComputerItem;
+import dan200.computercraft.shared.pocket.recipes.PocketComputerUpgradeRecipe;
+import dan200.computercraft.shared.recipe.CustomShapelessRecipe;
+import dan200.computercraft.shared.recipe.ImpostorShapedRecipe;
+import dan200.computercraft.shared.recipe.ImpostorShapelessRecipe;
 import dan200.computercraft.shared.turtle.items.TurtleItem;
+import dan200.computercraft.shared.turtle.recipes.TurtleOverlayRecipe;
+import dan200.computercraft.shared.turtle.recipes.TurtleRecipe;
+import dan200.computercraft.shared.turtle.recipes.TurtleUpgradeRecipe;
 import dan200.computercraft.shared.util.ColourUtils;
+import net.minecraft.Util;
+import net.minecraft.advancements.Criterion;
 import net.minecraft.advancements.critereon.InventoryChangeTrigger;
 import net.minecraft.advancements.critereon.ItemPredicate;
+import net.minecraft.core.registries.BuiltInRegistries;
 import net.minecraft.core.registries.Registries;
 import net.minecraft.data.PackOutput;
-import net.minecraft.data.recipes.*;
+import net.minecraft.data.recipes.RecipeCategory;
+import net.minecraft.data.recipes.RecipeOutput;
+import net.minecraft.data.recipes.ShapedRecipeBuilder;
+import net.minecraft.data.recipes.ShapelessRecipeBuilder;
 import net.minecraft.nbt.CompoundTag;
 import net.minecraft.nbt.NbtUtils;
 import net.minecraft.resources.ResourceLocation;
 import net.minecraft.tags.TagKey;
 import net.minecraft.util.GsonHelper;
 import net.minecraft.world.item.*;
+import net.minecraft.world.item.crafting.CraftingBookCategory;
 import net.minecraft.world.item.crafting.Ingredient;
-import net.minecraft.world.item.crafting.ShapedRecipe;
+import net.minecraft.world.item.crafting.Recipe;
-import net.minecraft.world.item.crafting.SimpleCraftingRecipeSerializer;
 import net.minecraft.world.level.ItemLike;
 import net.minecraft.world.level.block.Blocks;
 
@@ -43,7 +65,7 @@ import java.util.function.Consumer;
 import static dan200.computercraft.api.ComputerCraftTags.Items.COMPUTER;
 import static dan200.computercraft.api.ComputerCraftTags.Items.WIRED_MODEM;
 
-class RecipeProvider extends net.minecraft.data.recipes.RecipeProvider {
+final class RecipeProvider extends net.minecraft.data.recipes.RecipeProvider {
     private final RecipeIngredients ingredients = PlatformHelper.get().getRecipeIngredients();
     private final TurtleUpgradeDataProvider turtleUpgrades;
     private final PocketUpgradeDataProvider pocketUpgrades;
@@ -55,40 +77,37 @@ class RecipeProvider extends net.minecraft.data.recipes.RecipeProvider {
     }
 
     @Override
-    public void buildRecipes(Consumer<FinishedRecipe> add) {
+    public void buildRecipes(RecipeOutput add) {
         basicRecipes(add);
         diskColours(add);
         pocketUpgrades(add);
         turtleUpgrades(add);
         turtleOverlays(add);
 
-        addSpecial(add, ModRegistry.RecipeSerializers.PRINTOUT.get());
+        addSpecial(add, new PrintoutRecipe(CraftingBookCategory.MISC));
-        addSpecial(add, ModRegistry.RecipeSerializers.DISK.get());
+        addSpecial(add, new DiskRecipe(CraftingBookCategory.MISC));
-        addSpecial(add, ModRegistry.RecipeSerializers.DYEABLE_ITEM.get());
+        addSpecial(add, new ColourableRecipe(CraftingBookCategory.MISC));
-        addSpecial(add, ModRegistry.RecipeSerializers.DYEABLE_ITEM_CLEAR.get());
+        addSpecial(add, new ClearColourRecipe(CraftingBookCategory.MISC));
-        addSpecial(add, ModRegistry.RecipeSerializers.TURTLE_UPGRADE.get());
+        addSpecial(add, new TurtleUpgradeRecipe(CraftingBookCategory.MISC));
-        addSpecial(add, ModRegistry.RecipeSerializers.POCKET_COMPUTER_UPGRADE.get());
+        addSpecial(add, new PocketComputerUpgradeRecipe(CraftingBookCategory.MISC));
     }
 
     /**
      * Register a crafting recipe for a disk of every dye colour.
      *
-     * @param add The callback to add recipes.
+     * @param output The callback to add recipes.
      */
-    private void diskColours(Consumer<FinishedRecipe> add) {
+    private void diskColours(RecipeOutput output) {
         for (var colour : Colour.VALUES) {
-            ShapelessRecipeBuilder
+            ShapelessSpecBuilder
-                .shapeless(RecipeCategory.REDSTONE, ModRegistry.Items.DISK.get())
+                .shapeless(RecipeCategory.REDSTONE, DiskItem.createFromIDAndColour(-1, null, colour.getHex()))
                 .requires(ingredients.redstone())
                 .requires(Items.PAPER)
                 .requires(DyeItem.byColor(ofColour(colour)))
                 .group("computercraft:disk")
                 .unlockedBy("has_drive", inventoryChange(ModRegistry.Blocks.DISK_DRIVE.get()))
-                .save(
+                .build(ImpostorShapelessRecipe::new)
-                    RecipeWrapper.wrap(ModRegistry.RecipeSerializers.IMPOSTOR_SHAPELESS.get(), add)
+                .save(output, new ResourceLocation(ComputerCraftAPI.MOD_ID, "disk_" + (colour.ordinal() + 1)));
-                        .withResultTag(x -> x.putInt(IColouredItem.NBT_COLOUR, colour.getHex())),
-                    new ResourceLocation(ComputerCraftAPI.MOD_ID, "disk_" + (colour.ordinal() + 1))
-                );
         }
     }
 
@@ -101,23 +120,22 @@ class RecipeProvider extends net.minecraft.data.recipes.RecipeProvider {
      *
      * @param add The callback to add recipes.
      */
-    private void turtleUpgrades(Consumer<FinishedRecipe> add) {
+    private void turtleUpgrades(RecipeOutput add) {
         for (var turtleItem : turtleItems()) {
             var base = turtleItem.create(-1, null, -1, null, null, 0, null);
-            var name = RegistryWrappers.ITEMS.getKey(turtleItem);
+            var name = RegistryHelper.getKeyOrThrow(BuiltInRegistries.ITEM, turtleItem);
 
             for (var upgrade : turtleUpgrades.getGeneratedUpgrades()) {
-                var result = turtleItem.create(-1, null, -1, null, UpgradeData.ofDefault(upgrade), -1, null);
+                ShapedSpecBuilder
-                ShapedRecipeBuilder
+                    .shaped(RecipeCategory.REDSTONE, turtleItem.create(-1, null, -1, null, UpgradeData.ofDefault(upgrade), -1, null))
-                    .shaped(RecipeCategory.REDSTONE, result.getItem())
                     .group(name.toString())
                     .pattern("#T")
                     .define('T', base.getItem())
                     .define('#', upgrade.getCraftingItem().getItem())
-                    .unlockedBy("has_items",
+                    .unlockedBy("has_items", inventoryChange(base.getItem(), upgrade.getCraftingItem().getItem()))
-                        inventoryChange(base.getItem(), upgrade.getCraftingItem().getItem()))
+                    .build(ImpostorShapedRecipe::new)
                     .save(
-                        RecipeWrapper.wrap(ModRegistry.RecipeSerializers.IMPOSTOR_SHAPED.get(), add).withResultTag(result.getTag()),
+                        add,
                         name.withSuffix(String.format("/%s/%s", upgrade.getUpgradeID().getNamespace(), upgrade.getUpgradeID().getPath()))
                     );
             }
@@ -133,31 +151,30 @@ class RecipeProvider extends net.minecraft.data.recipes.RecipeProvider {
      *
      * @param add The callback to add recipes.
      */
-    private void pocketUpgrades(Consumer<FinishedRecipe> add) {
+    private void pocketUpgrades(RecipeOutput add) {
         for (var pocket : pocketComputerItems()) {
             var base = pocket.create(-1, null, -1, null);
-            var name = RegistryWrappers.ITEMS.getKey(pocket).withPath(x -> x.replace("pocket_computer_", "pocket_"));
+            var name = RegistryHelper.getKeyOrThrow(BuiltInRegistries.ITEM, pocket).withPath(x -> x.replace("pocket_computer_", "pocket_"));
 
             for (var upgrade : pocketUpgrades.getGeneratedUpgrades()) {
-                var result = pocket.create(-1, null, -1, UpgradeData.ofDefault(upgrade));
+                ShapedSpecBuilder
-                ShapedRecipeBuilder
+                    .shaped(RecipeCategory.REDSTONE, pocket.create(-1, null, -1, UpgradeData.ofDefault(upgrade)))
-                    .shaped(RecipeCategory.REDSTONE, result.getItem())
                     .group(name.toString())
                     .pattern("#")
                     .pattern("P")
                     .define('P', base.getItem())
                     .define('#', upgrade.getCraftingItem().getItem())
-                    .unlockedBy("has_items",
+                    .unlockedBy("has_items", inventoryChange(base.getItem(), upgrade.getCraftingItem().getItem()))
-                        inventoryChange(base.getItem(), upgrade.getCraftingItem().getItem()))
+                    .build(ImpostorShapedRecipe::new)
                     .save(
-                        RecipeWrapper.wrap(ModRegistry.RecipeSerializers.IMPOSTOR_SHAPED.get(), add).withResultTag(result.getTag()),
+                        add,
                         name.withSuffix(String.format("/%s/%s", upgrade.getUpgradeID().getNamespace(), upgrade.getUpgradeID().getPath()))
                     );
             }
         }
     }
 
-    private void turtleOverlays(Consumer<FinishedRecipe> add) {
+    private void turtleOverlays(RecipeOutput add) {
         turtleOverlay(add, "turtle_trans_overlay", x -> x
             .unlockedBy("has_dye", inventoryChange(itemPredicate(ingredients.dye())))
             .requires(ColourUtils.getDyeTag(DyeColor.LIGHT_BLUE))
@@ -178,28 +195,24 @@ class RecipeProvider extends net.minecraft.data.recipes.RecipeProvider {
         );
     }
 
-    private void turtleOverlay(Consumer<FinishedRecipe> add, String overlay, Consumer<ShapelessRecipeBuilder> build) {
+    private void turtleOverlay(RecipeOutput add, String overlay, Consumer<ShapelessSpecBuilder> build) {
         for (var turtleItem : turtleItems()) {
             var base = turtleItem.create(-1, null, -1, null, null, 0, null);
-            var name = RegistryWrappers.ITEMS.getKey(turtleItem);
+            var name = RegistryHelper.getKeyOrThrow(BuiltInRegistries.ITEM, turtleItem);
 
-            var builder = ShapelessRecipeBuilder.shapeless(RecipeCategory.REDSTONE, base.getItem())
+            var builder = ShapelessSpecBuilder.shapeless(RecipeCategory.REDSTONE, base)
                 .group(name.withSuffix("_overlay").toString())
                 .unlockedBy("has_turtle", inventoryChange(base.getItem()));
             build.accept(builder);
             builder
                 .requires(base.getItem())
-                .save(
+                .build(s -> new TurtleOverlayRecipe(s, new ResourceLocation(ComputerCraftAPI.MOD_ID, "block/" + overlay)))
-                    RecipeWrapper
+                .save(add, name.withSuffix("_overlays/" + overlay));
-                        .wrap(ModRegistry.RecipeSerializers.TURTLE_OVERLAY.get(), add)
-                        .withExtraData(x -> x.addProperty("overlay", new ResourceLocation(ComputerCraftAPI.MOD_ID, "block/" + overlay).toString())),
-                    name.withSuffix("_overlays/" + overlay)
-                );
         }
     }
 
 
-    private void basicRecipes(Consumer<FinishedRecipe> add) {
+    private void basicRecipes(RecipeOutput add) {
         ShapedRecipeBuilder
             .shaped(RecipeCategory.REDSTONE, ModRegistry.Items.CABLE.get(), 6)
             .pattern(" # ")
@@ -233,7 +246,7 @@ class RecipeProvider extends net.minecraft.data.recipes.RecipeProvider {
             .unlockedBy("has_components", inventoryChange(itemPredicate(ingredients.redstone()), itemPredicate(ingredients.goldIngot())))
             .save(add);
 
-        ShapedRecipeBuilder
+        ShapedSpecBuilder
             .shaped(RecipeCategory.REDSTONE, ModRegistry.Items.COMPUTER_ADVANCED.get())
             .pattern("###")
             .pattern("#C#")
@@ -241,10 +254,8 @@ class RecipeProvider extends net.minecraft.data.recipes.RecipeProvider {
             .define('#', ingredients.goldIngot())
             .define('C', ModRegistry.Items.COMPUTER_NORMAL.get())
             .unlockedBy("has_components", inventoryChange(itemPredicate(ModRegistry.Items.COMPUTER_NORMAL.get()), itemPredicate(ingredients.goldIngot())))
-            .save(
+            .build(ComputerUpgradeRecipe::new)
-                RecipeWrapper.wrap(ModRegistry.RecipeSerializers.COMPUTER_UPGRADE.get(), add),
+            .save(add, new ResourceLocation(ComputerCraftAPI.MOD_ID, "computer_advanced_upgrade"));
-                new ResourceLocation(ComputerCraftAPI.MOD_ID, "computer_advanced_upgrade")
-            );
 
         ShapedRecipeBuilder
             .shaped(RecipeCategory.REDSTONE, ModRegistry.Blocks.COMPUTER_COMMAND.get())
@@ -257,7 +268,7 @@ class RecipeProvider extends net.minecraft.data.recipes.RecipeProvider {
             .unlockedBy("has_components", inventoryChange(Blocks.COMMAND_BLOCK))
             .save(add);
 
-        ShapedRecipeBuilder
+        ShapedSpecBuilder
             .shaped(RecipeCategory.REDSTONE, ModRegistry.Blocks.TURTLE_NORMAL.get())
             .pattern("###")
             .pattern("#C#")
@@ -266,9 +277,10 @@ class RecipeProvider extends net.minecraft.data.recipes.RecipeProvider {
             .define('C', ModRegistry.Items.COMPUTER_NORMAL.get())
             .define('I', ingredients.woodenChest())
             .unlockedBy("has_computer", inventoryChange(ModRegistry.Items.COMPUTER_NORMAL.get()))
-            .save(RecipeWrapper.wrap(ModRegistry.RecipeSerializers.TURTLE.get(), add));
+            .buildOrThrow(TurtleRecipe::of)
+            .save(add);
 
-        ShapedRecipeBuilder
+        ShapedSpecBuilder
             .shaped(RecipeCategory.REDSTONE, ModRegistry.Blocks.TURTLE_ADVANCED.get())
             .pattern("###")
             .pattern("#C#")
@@ -277,9 +289,10 @@ class RecipeProvider extends net.minecraft.data.recipes.RecipeProvider {
             .define('C', ModRegistry.Items.COMPUTER_ADVANCED.get())
             .define('I', ingredients.woodenChest())
             .unlockedBy("has_computer", inventoryChange(ModRegistry.Items.COMPUTER_NORMAL.get()))
-            .save(RecipeWrapper.wrap(ModRegistry.RecipeSerializers.TURTLE.get(), add));
+            .buildOrThrow(TurtleRecipe::of)
+            .save(add);
 
-        ShapedRecipeBuilder
+        ShapedSpecBuilder
             .shaped(RecipeCategory.REDSTONE, ModRegistry.Blocks.TURTLE_ADVANCED.get())
             .pattern("###")
             .pattern("#C#")
@@ -288,10 +301,8 @@ class RecipeProvider extends net.minecraft.data.recipes.RecipeProvider {
             .define('C', ModRegistry.Items.TURTLE_NORMAL.get())
             .define('B', ingredients.goldBlock())
             .unlockedBy("has_components", inventoryChange(itemPredicate(ModRegistry.Items.TURTLE_NORMAL.get()), itemPredicate(ingredients.goldIngot())))
-            .save(
+            .build(ComputerUpgradeRecipe::new)
-                RecipeWrapper.wrap(ModRegistry.RecipeSerializers.COMPUTER_UPGRADE.get(), add),
+            .save(add, new ResourceLocation(ComputerCraftAPI.MOD_ID, "turtle_advanced_upgrade"));
-                new ResourceLocation(ComputerCraftAPI.MOD_ID, "turtle_advanced_upgrade")
-            );
 
         ShapedRecipeBuilder
             .shaped(RecipeCategory.REDSTONE, ModRegistry.Blocks.DISK_DRIVE.get())
@@ -347,7 +358,7 @@ class RecipeProvider extends net.minecraft.data.recipes.RecipeProvider {
             .unlockedBy("has_apple", inventoryChange(Items.GOLDEN_APPLE))
             .save(add);
 
-        ShapedRecipeBuilder
+        ShapedSpecBuilder
             .shaped(RecipeCategory.REDSTONE, ModRegistry.Items.POCKET_COMPUTER_ADVANCED.get())
             .pattern("###")
             .pattern("#C#")
@@ -355,10 +366,8 @@ class RecipeProvider extends net.minecraft.data.recipes.RecipeProvider {
             .define('#', ingredients.goldIngot())
             .define('C', ModRegistry.Items.POCKET_COMPUTER_NORMAL.get())
             .unlockedBy("has_components", inventoryChange(itemPredicate(ModRegistry.Items.POCKET_COMPUTER_NORMAL.get()), itemPredicate(ingredients.goldIngot())))
-            .save(
+            .build(ComputerUpgradeRecipe::new)
-                RecipeWrapper.wrap(ModRegistry.RecipeSerializers.COMPUTER_UPGRADE.get(), add),
+            .save(add, new ResourceLocation(ComputerCraftAPI.MOD_ID, "pocket_computer_advanced_upgrade"));
-                new ResourceLocation(ComputerCraftAPI.MOD_ID, "pocket_computer_advanced_upgrade")
-            );
 
         ShapedRecipeBuilder
             .shaped(RecipeCategory.REDSTONE, ModRegistry.Blocks.PRINTER.get())
@@ -425,57 +434,53 @@ class RecipeProvider extends net.minecraft.data.recipes.RecipeProvider {
             .unlockedBy("has_wireless", inventoryChange(ModRegistry.Blocks.WIRELESS_MODEM_NORMAL.get()))
             .save(add);
 
-        ShapelessRecipeBuilder
+        ShapelessSpecBuilder
-            .shapeless(RecipeCategory.DECORATIONS, Items.PLAYER_HEAD)
+            .shapeless(RecipeCategory.DECORATIONS, playerHead("Cloudhunter", "6d074736-b1e9-4378-a99b-bd8777821c9c"))
             .requires(ingredients.head())
             .requires(ModRegistry.Items.MONITOR_NORMAL.get())
             .unlockedBy("has_monitor", inventoryChange(ModRegistry.Items.MONITOR_NORMAL.get()))
-            .save(
+            .build(CustomShapelessRecipe::new)
-                RecipeWrapper.wrap(ModRegistry.RecipeSerializers.SHAPELESS.get(), add)
+            .save(add, new ResourceLocation(ComputerCraftAPI.MOD_ID, "skull_cloudy"));
-                    .withResultTag(playerHead("Cloudhunter", "6d074736-b1e9-4378-a99b-bd8777821c9c")),
-                new ResourceLocation(ComputerCraftAPI.MOD_ID, "skull_cloudy")
-            );
 
-        ShapelessRecipeBuilder
+        ShapelessSpecBuilder
-            .shapeless(RecipeCategory.DECORATIONS, Items.PLAYER_HEAD)
+            .shapeless(RecipeCategory.DECORATIONS, playerHead("dan200", "f3c8d69b-0776-4512-8434-d1b2165909eb"))
             .requires(ingredients.head())
             .requires(ModRegistry.Items.COMPUTER_ADVANCED.get())
             .unlockedBy("has_computer", inventoryChange(ModRegistry.Items.COMPUTER_ADVANCED.get()))
-            .save(
+            .build(CustomShapelessRecipe::new)
-                RecipeWrapper.wrap(ModRegistry.RecipeSerializers.SHAPELESS.get(), add)
+            .save(add, new ResourceLocation(ComputerCraftAPI.MOD_ID, "skull_dan200"));
-                    .withResultTag(playerHead("dan200", "f3c8d69b-0776-4512-8434-d1b2165909eb")),
-                new ResourceLocation(ComputerCraftAPI.MOD_ID, "skull_dan200")
-            );
 
-        ShapelessRecipeBuilder
+        ShapelessSpecBuilder
             .shapeless(RecipeCategory.REDSTONE, ModRegistry.Items.PRINTED_PAGES.get())
             .requires(ModRegistry.Items.PRINTED_PAGE.get(), 2)
             .requires(ingredients.string())
             .unlockedBy("has_printer", inventoryChange(ModRegistry.Blocks.PRINTER.get()))
-            .save(RecipeWrapper.wrap(ModRegistry.RecipeSerializers.IMPOSTOR_SHAPELESS.get(), add));
+            .build(ImpostorShapelessRecipe::new)
+            .save(add);
 
-        ShapelessRecipeBuilder
+        ShapelessSpecBuilder
             .shapeless(RecipeCategory.REDSTONE, ModRegistry.Items.PRINTED_BOOK.get())
             .requires(ingredients.leather())
             .requires(ModRegistry.Items.PRINTED_PAGE.get(), 1)
             .requires(ingredients.string())
             .unlockedBy("has_printer", inventoryChange(ModRegistry.Blocks.PRINTER.get()))
-            .save(RecipeWrapper.wrap(ModRegistry.RecipeSerializers.IMPOSTOR_SHAPELESS.get(), add));
+            .build(ImpostorShapelessRecipe::new)
+            .save(add);
     }
 
     private static DyeColor ofColour(Colour colour) {
         return DyeColor.byId(15 - colour.ordinal());
     }
 
-    private static InventoryChangeTrigger.TriggerInstance inventoryChange(TagKey<Item> stack) {
+    private static Criterion<InventoryChangeTrigger.TriggerInstance> inventoryChange(TagKey<Item> stack) {
         return InventoryChangeTrigger.TriggerInstance.hasItems(itemPredicate(stack));
     }
 
-    private static InventoryChangeTrigger.TriggerInstance inventoryChange(ItemLike... stack) {
+    private static Criterion<InventoryChangeTrigger.TriggerInstance> inventoryChange(ItemLike... stack) {
         return InventoryChangeTrigger.TriggerInstance.hasItems(stack);
     }
 
-    private static InventoryChangeTrigger.TriggerInstance inventoryChange(ItemPredicate... items) {
+    private static Criterion<InventoryChangeTrigger.TriggerInstance> inventoryChange(ItemPredicate... items) {
         return InventoryChangeTrigger.TriggerInstance.hasItems(items);
     }
 
@@ -488,11 +493,12 @@ class RecipeProvider extends net.minecraft.data.recipes.RecipeProvider {
     }
 
     private static ItemPredicate itemPredicate(Ingredient ingredient) {
-        var json = ingredient.toJson();
+        var json = Util.getOrThrow(Ingredient.CODEC_NONEMPTY.encodeStart(JsonOps.INSTANCE, ingredient), JsonParseException::new);
         if (!(json instanceof JsonObject object)) throw new IllegalStateException("Unknown ingredient " + json);
 
         if (object.has("item")) {
-            return itemPredicate(ShapedRecipe.itemFromJson(object));
+            var item = Util.getOrThrow(ItemStack.ITEM_WITH_COUNT_CODEC.parse(JsonOps.INSTANCE, object), JsonParseException::new);
+            return itemPredicate(item.getItem());
         } else if (object.has("tag")) {
             return itemPredicate(TagKey.create(Registries.ITEM, new ResourceLocation(GsonHelper.getAsString(object, "tag"))));
         } else {
@@ -500,15 +506,14 @@ class RecipeProvider extends net.minecraft.data.recipes.RecipeProvider {
         }
     }
 
-    private static CompoundTag playerHead(String name, String uuid) {
+    private static ItemStack playerHead(String name, String uuid) {
+        var item = new ItemStack(Items.PLAYER_HEAD);
         var owner = NbtUtils.writeGameProfile(new CompoundTag(), new GameProfile(UUID.fromString(uuid), name));
-
+        item.getOrCreateTag().put(PlayerHeadItem.TAG_SKULL_OWNER, owner);
-        var tag = new CompoundTag();
+        return item;
-        tag.put(PlayerHeadItem.TAG_SKULL_OWNER, owner);
-        return tag;
     }
 
-    private static void addSpecial(Consumer<FinishedRecipe> add, SimpleCraftingRecipeSerializer<?> special) {
+    private static void addSpecial(RecipeOutput add, Recipe<?> recipe) {
-        SpecialRecipeBuilder.special(special).save(add, RegistryWrappers.RECIPE_SERIALIZERS.getKey(special).toString());
+        add.accept(RegistryHelper.getKeyOrThrow(BuiltInRegistries.RECIPE_SERIALIZER, recipe.getSerializer()), recipe, null);
     }
 }

projects/common/src/main/java/dan200/computercraft/data/RecipeWrapper.java

@@ -1,93 +0,0 @@
-// SPDX-FileCopyrightText: 2020 The CC: Tweaked Developers
-//
-// SPDX-License-Identifier: MPL-2.0
-
-package dan200.computercraft.data;
-
-import com.google.gson.JsonObject;
-import net.minecraft.data.recipes.FinishedRecipe;
-import net.minecraft.nbt.CompoundTag;
-import net.minecraft.resources.ResourceLocation;
-import net.minecraft.util.GsonHelper;
-import net.minecraft.world.item.crafting.RecipeSerializer;
-
-import javax.annotation.Nullable;
-import java.util.ArrayList;
-import java.util.List;
-import java.util.function.Consumer;
-
-/**
- * Adapter for recipes which overrides the serializer and adds custom item NBT.
- */
-final class RecipeWrapper implements Consumer<FinishedRecipe> {
-    private final Consumer<FinishedRecipe> add;
-    private final RecipeSerializer<?> serializer;
-    private final List<Consumer<JsonObject>> extend = new ArrayList<>(0);
-
-    RecipeWrapper(Consumer<FinishedRecipe> add, RecipeSerializer<?> serializer) {
-        this.add = add;
-        this.serializer = serializer;
-    }
-
-    public static RecipeWrapper wrap(RecipeSerializer<?> serializer, Consumer<FinishedRecipe> original) {
-        return new RecipeWrapper(original, serializer);
-    }
-
-    public RecipeWrapper withExtraData(Consumer<JsonObject> extra) {
-        extend.add(extra);
-        return this;
-    }
-
-    public RecipeWrapper withResultTag(@Nullable CompoundTag resultTag) {
-        if (resultTag == null) return this;
-
-        extend.add(json -> {
-            var object = GsonHelper.getAsJsonObject(json, "result");
-            object.addProperty("nbt", resultTag.toString());
-        });
-        return this;
-    }
-
-    public RecipeWrapper withResultTag(Consumer<CompoundTag> resultTag) {
-        var tag = new CompoundTag();
-        resultTag.accept(tag);
-        return withResultTag(tag);
-    }
-
-    @Override
-    public void accept(FinishedRecipe finishedRecipe) {
-        add.accept(new RecipeImpl(finishedRecipe, serializer, extend));
-    }
-
-    private record RecipeImpl(
-        FinishedRecipe recipe, RecipeSerializer<?> serializer, List<Consumer<JsonObject>> extend
-    ) implements FinishedRecipe {
-        @Override
-        public void serializeRecipeData(JsonObject jsonObject) {
-            recipe.serializeRecipeData(jsonObject);
-            for (var extender : extend) extender.accept(jsonObject);
-        }
-
-        @Override
-        public ResourceLocation getId() {
-            return recipe.getId();
-        }
-
-        @Override
-        public RecipeSerializer<?> getType() {
-            return serializer;
-        }
-
-        @Nullable
-        @Override
-        public JsonObject serializeAdvancement() {
-            return recipe.serializeAdvancement();
-        }
-
-        @Nullable
-        @Override
-        public ResourceLocation getAdvancementId() {
-            return recipe.getAdvancementId();
-        }
-    }
-}

projects/common/src/main/java/dan200/computercraft/data/TagProvider.java

@@ -5,8 +5,9 @@
 package dan200.computercraft.data;
 
 import dan200.computercraft.api.ComputerCraftTags;
+import dan200.computercraft.impl.RegistryHelper;
 import dan200.computercraft.shared.ModRegistry;
-import dan200.computercraft.shared.platform.RegistryWrappers;
+import net.minecraft.core.Registry;
 import net.minecraft.data.tags.ItemTagsProvider;
 import net.minecraft.data.tags.TagsProvider;
 import net.minecraft.tags.BlockTags;
@@ -111,9 +112,9 @@ class TagProvider {
         TagAppender<T> tag(TagKey<T> tag);
     }
 
-    public record TagAppender<T>(RegistryWrappers.RegistryWrapper<T> registry, TagBuilder builder) {
+    public record TagAppender<T>(Registry<T> registry, TagBuilder builder) {
         public TagAppender<T> add(T object) {
-            builder.addElement(registry.getKey(object));
+            builder.addElement(RegistryHelper.getKeyOrThrow(registry, object));
             return this;
         }
 

projects/common/src/main/java/dan200/computercraft/data/TurtleUpgradeProvider.java

@@ -6,8 +6,9 @@ package dan200.computercraft.data;
 
 import dan200.computercraft.api.ComputerCraftAPI;
 import dan200.computercraft.api.ComputerCraftTags.Blocks;
+import dan200.computercraft.api.turtle.ITurtleUpgrade;
 import dan200.computercraft.api.turtle.TurtleUpgradeDataProvider;
-import dan200.computercraft.api.turtle.TurtleUpgradeSerialiser;
+import dan200.computercraft.api.upgrades.UpgradeSerialiser;
 import net.minecraft.data.PackOutput;
 import net.minecraft.resources.ResourceLocation;
 
@@ -22,7 +23,7 @@ class TurtleUpgradeProvider extends TurtleUpgradeDataProvider {
     }
 
     @Override
-    protected void addUpgrades(Consumer<Upgrade<TurtleUpgradeSerialiser<?>>> addUpgrade) {
+    protected void addUpgrades(Consumer<Upgrade<UpgradeSerialiser<? extends ITurtleUpgrade>>> addUpgrade) {
         simpleWithCustomItem(id("speaker"), TurtleSerialisers.SPEAKER.get(), Items.SPEAKER.get()).add(addUpgrade);
         simpleWithCustomItem(vanilla("crafting_table"), TurtleSerialisers.WORKBENCH.get(), net.minecraft.world.item.Items.CRAFTING_TABLE).add(addUpgrade);
         simpleWithCustomItem(id("wireless_modem_normal"), TurtleSerialisers.WIRELESS_MODEM_NORMAL.get(), Items.WIRELESS_MODEM_NORMAL.get()).add(addUpgrade);

projects/common/src/main/java/dan200/computercraft/data/recipe/AbstractRecipeBuilder.java

@@ -0,0 +1,129 @@
+// SPDX-FileCopyrightText: 2023 The CC: Tweaked Developers
+//
+// SPDX-License-Identifier: MPL-2.0
+
+package dan200.computercraft.data.recipe;
+
+import com.mojang.serialization.DataResult;
+import dan200.computercraft.shared.recipe.RecipeProperties;
+import net.minecraft.Util;
+import net.minecraft.advancements.AdvancementRequirements;
+import net.minecraft.advancements.AdvancementRewards;
+import net.minecraft.advancements.Criterion;
+import net.minecraft.advancements.critereon.RecipeUnlockedTrigger;
+import net.minecraft.data.recipes.RecipeBuilder;
+import net.minecraft.data.recipes.RecipeCategory;
+import net.minecraft.data.recipes.RecipeOutput;
+import net.minecraft.resources.ResourceLocation;
+import net.minecraft.world.item.Item;
+import net.minecraft.world.item.ItemStack;
+import net.minecraft.world.item.crafting.Recipe;
+
+import java.util.LinkedHashMap;
+import java.util.Map;
+import java.util.function.Function;
+
+/**
+ * An abstract base class for creating recipes, in the style of {@link RecipeBuilder}.
+ *
+ * @param <S> The type of this class.
+ * @param <O> The output of this builder.
+ * @see ShapelessSpecBuilder
+ */
+public abstract class AbstractRecipeBuilder<S extends AbstractRecipeBuilder<S, O>, O> {
+    private final RecipeCategory category;
+    protected final ItemStack result;
+    private String group = "";
+    private final Map<String, Criterion<?>> criteria = new LinkedHashMap<>();
+
+    protected AbstractRecipeBuilder(RecipeCategory category, ItemStack result) {
+        this.category = category;
+        this.result = result;
+    }
+
+    /**
+     * Set the group for this recipe.
+     *
+     * @param group The new group.
+     * @return This object, for chaining.
+     */
+    public final S group(String group) {
+        this.group = group;
+        return self();
+    }
+
+    /**
+     * Add a criterion to this recipe.
+     *
+     * @param name      The name of the criterion.
+     * @param criterion The criterion to add.
+     * @return This object, for chaining.
+     */
+    public final S unlockedBy(String name, Criterion<?> criterion) {
+        criteria.put(name, criterion);
+        return self();
+    }
+
+    /**
+     * Convert this builder into the output ({@link O}) object.
+     *
+     * @param properties The properties for this recipe.
+     * @return The built object.
+     */
+    protected abstract O build(RecipeProperties properties);
+
+    /**
+     * Convert this builder into a concrete recipe.
+     *
+     * @param factory The recipe's constructor.
+     * @return The "built" recipe.
+     */
+    public final FinishedRecipe build(Function<O, Recipe<?>> factory) {
+        var properties = new RecipeProperties(group, RecipeBuilder.determineBookCategory(category), true);
+        return new FinishedRecipe(factory.apply(build(properties)), result.getItem(), category, criteria);
+    }
+
+    /**
+     * Convert this builder into a concrete recipe.
+     *
+     * @param factory The recipe's constructor.
+     * @return The "built" recipe.
+     */
+    public final FinishedRecipe buildOrThrow(Function<O, DataResult<? extends Recipe<?>>> factory) {
+        return build(s -> Util.getOrThrow(factory.apply(s), IllegalStateException::new));
+    }
+
+    @SuppressWarnings("unchecked")
+    private S self() {
+        return (S) this;
+    }
+
+    public static final class FinishedRecipe {
+        private final Recipe<?> recipe;
+        private final Item result;
+        private final RecipeCategory category;
+        private final Map<String, Criterion<?>> criteria;
+
+        private FinishedRecipe(Recipe<?> recipe, Item result, RecipeCategory category, Map<String, Criterion<?>> criteria) {
+            this.recipe = recipe;
+            this.result = result;
+            this.category = category;
+            this.criteria = criteria;
+        }
+
+        public void save(RecipeOutput output, ResourceLocation id) {
+            if (criteria.isEmpty()) throw new IllegalStateException("No way of obtaining recipe " + id);
+            var advancement = output.advancement()
+                .addCriterion("has_the_recipe", RecipeUnlockedTrigger.unlocked(id))
+                .rewards(AdvancementRewards.Builder.recipe(id))
+                .requirements(AdvancementRequirements.Strategy.OR);
+            for (var entry : criteria.entrySet()) advancement.addCriterion(entry.getKey(), entry.getValue());
+
+            output.accept(id, recipe, advancement.build(id.withPrefix("recipes/" + category.getFolderName() + "/")));
+        }
+
+        public void save(RecipeOutput output) {
+            save(output, RecipeBuilder.getDefaultRecipeId(result));
+        }
+    }
+}

projects/common/src/main/java/dan200/computercraft/data/recipe/ShapedSpecBuilder.java

@@ -0,0 +1,71 @@
+// SPDX-FileCopyrightText: 2023 The CC: Tweaked Developers
+//
+// SPDX-License-Identifier: MPL-2.0
+
+package dan200.computercraft.data.recipe;
+
+import dan200.computercraft.shared.recipe.RecipeProperties;
+import dan200.computercraft.shared.recipe.ShapedRecipeSpec;
+import net.minecraft.data.recipes.RecipeCategory;
+import net.minecraft.data.recipes.ShapedRecipeBuilder;
+import net.minecraft.tags.TagKey;
+import net.minecraft.world.item.Item;
+import net.minecraft.world.item.ItemStack;
+import net.minecraft.world.item.crafting.Ingredient;
+import net.minecraft.world.item.crafting.ShapedRecipePattern;
+import net.minecraft.world.level.ItemLike;
+
+import java.util.ArrayList;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * A builder for {@link ShapedRecipeSpec}s, much like {@link ShapedRecipeBuilder}.
+ */
+public final class ShapedSpecBuilder extends AbstractRecipeBuilder<ShapedSpecBuilder, ShapedRecipeSpec> {
+    private final List<String> rows = new ArrayList<>();
+    private final Map<Character, Ingredient> key = new LinkedHashMap<>();
+
+    private ShapedSpecBuilder(RecipeCategory category, ItemStack result) {
+        super(category, result);
+    }
+
+    public static ShapedSpecBuilder shaped(RecipeCategory category, ItemStack result) {
+        return new ShapedSpecBuilder(category, result);
+    }
+
+    public static ShapedSpecBuilder shaped(RecipeCategory category, ItemLike result) {
+        return new ShapedSpecBuilder(category, new ItemStack(result));
+    }
+
+    public ShapedSpecBuilder define(char key, Ingredient ingredient) {
+        if (this.key.containsKey(key)) throw new IllegalArgumentException("Symbol '" + key + "' is already defined!");
+        if (key == ' ') throw new IllegalArgumentException("Symbol ' ' (whitespace) is reserved and cannot be defined");
+
+        this.key.put(key, ingredient);
+        return this;
+    }
+
+    public ShapedSpecBuilder define(char key, TagKey<Item> tag) {
+        return this.define(key, Ingredient.of(tag));
+    }
+
+    public ShapedSpecBuilder define(char key, ItemLike item) {
+        return this.define(key, Ingredient.of(item));
+    }
+
+    public ShapedSpecBuilder pattern(String pattern) {
+        if (!this.rows.isEmpty() && pattern.length() != this.rows.get(0).length()) {
+            throw new IllegalArgumentException("Pattern must be the same width on every line!");
+        } else {
+            this.rows.add(pattern);
+            return this;
+        }
+    }
+
+    @Override
+    protected ShapedRecipeSpec build(RecipeProperties properties) {
+        return new ShapedRecipeSpec(properties, ShapedRecipePattern.of(key, rows), result);
+    }
+}

projects/common/src/main/java/dan200/computercraft/data/recipe/ShapelessSpecBuilder.java

@@ -0,0 +1,61 @@
+// SPDX-FileCopyrightText: 2023 The CC: Tweaked Developers
+//
+// SPDX-License-Identifier: MPL-2.0
+
+package dan200.computercraft.data.recipe;
+
+import dan200.computercraft.shared.recipe.RecipeProperties;
+import dan200.computercraft.shared.recipe.ShapelessRecipeSpec;
+import net.minecraft.core.NonNullList;
+import net.minecraft.data.recipes.RecipeCategory;
+import net.minecraft.data.recipes.ShapelessRecipeBuilder;
+import net.minecraft.tags.TagKey;
+import net.minecraft.world.item.Item;
+import net.minecraft.world.item.ItemStack;
+import net.minecraft.world.item.crafting.Ingredient;
+import net.minecraft.world.level.ItemLike;
+
+/**
+ * A builder for {@link ShapelessRecipeSpec}s, much like {@link ShapelessRecipeBuilder}.
+ */
+public final class ShapelessSpecBuilder extends AbstractRecipeBuilder<ShapelessSpecBuilder, ShapelessRecipeSpec> {
+    private final NonNullList<Ingredient> ingredients = NonNullList.create();
+
+    private ShapelessSpecBuilder(RecipeCategory category, ItemStack result) {
+        super(category, result);
+    }
+
+    public static ShapelessSpecBuilder shapeless(RecipeCategory category, ItemStack result) {
+        return new ShapelessSpecBuilder(category, result);
+    }
+
+    public static ShapelessSpecBuilder shapeless(RecipeCategory category, ItemLike result) {
+        return new ShapelessSpecBuilder(category, new ItemStack(result));
+    }
+
+    public ShapelessSpecBuilder requires(Ingredient ingredient, int count) {
+        for (int i = 0; i < count; i++) ingredients.add(ingredient);
+        return this;
+    }
+
+    public ShapelessSpecBuilder requires(Ingredient ingredient) {
+        return requires(ingredient, 1);
+    }
+
+    public ShapelessSpecBuilder requires(ItemLike item) {
+        return requires(Ingredient.of(new ItemStack(item)));
+    }
+
+    public ShapelessSpecBuilder requires(ItemLike item, int count) {
+        return requires(Ingredient.of(new ItemStack(item)), count);
+    }
+
+    public ShapelessSpecBuilder requires(TagKey<Item> item) {
+        return requires(Ingredient.of(item));
+    }
+
+    @Override
+    protected ShapelessRecipeSpec build(RecipeProperties properties) {
+        return new ShapelessRecipeSpec(properties, ingredients, result);
+    }
+}

projects/common/src/main/java/dan200/computercraft/impl/AbstractComputerCraftAPI.java

@@ -15,10 +15,11 @@ import dan200.computercraft.api.media.MediaProvider;
 import dan200.computercraft.api.network.PacketNetwork;
 import dan200.computercraft.api.network.wired.WiredElement;
 import dan200.computercraft.api.network.wired.WiredNode;
-import dan200.computercraft.api.pocket.PocketUpgradeSerialiser;
+import dan200.computercraft.api.pocket.IPocketUpgrade;
 import dan200.computercraft.api.redstone.BundledRedstoneProvider;
+import dan200.computercraft.api.turtle.ITurtleUpgrade;
 import dan200.computercraft.api.turtle.TurtleRefuelHandler;
-import dan200.computercraft.api.turtle.TurtleUpgradeSerialiser;
+import dan200.computercraft.api.upgrades.UpgradeSerialiser;
 import dan200.computercraft.core.filesystem.WritableFileMount;
 import dan200.computercraft.impl.detail.DetailRegistryImpl;
 import dan200.computercraft.impl.network.wired.WiredNodeImpl;
@@ -44,8 +45,8 @@ public abstract class AbstractComputerCraftAPI implements ComputerCraftAPIServic
     private final DetailRegistry<ItemStack> itemStackDetails = new DetailRegistryImpl<>(ItemDetails::fillBasic);
     private final DetailRegistry<BlockReference> blockDetails = new DetailRegistryImpl<>(BlockDetails::fillBasic);
 
-    protected static final ResourceKey<Registry<TurtleUpgradeSerialiser<?>>> turtleUpgradeRegistryId = ResourceKey.createRegistryKey(new ResourceLocation(ComputerCraftAPI.MOD_ID, "turtle_upgrade_serialiser"));
+    protected static final ResourceKey<Registry<UpgradeSerialiser<? extends ITurtleUpgrade>>> turtleUpgradeRegistryId = ResourceKey.createRegistryKey(new ResourceLocation(ComputerCraftAPI.MOD_ID, "turtle_upgrade_serialiser"));
-    protected static final ResourceKey<Registry<PocketUpgradeSerialiser<?>>> pocketUpgradeRegistryId = ResourceKey.createRegistryKey(new ResourceLocation(ComputerCraftAPI.MOD_ID, "pocket_upgrade_serialiser"));
+    protected static final ResourceKey<Registry<UpgradeSerialiser<? extends IPocketUpgrade>>> pocketUpgradeRegistryId = ResourceKey.createRegistryKey(new ResourceLocation(ComputerCraftAPI.MOD_ID, "pocket_upgrade_serialiser"));
 
     public static @Nullable InputStream getResourceFile(MinecraftServer server, String domain, String subPath) {
         var manager = server.getResourceManager();
@@ -116,12 +117,12 @@ public abstract class AbstractComputerCraftAPI implements ComputerCraftAPIServic
     }
 
     @Override
-    public final ResourceKey<Registry<TurtleUpgradeSerialiser<?>>> turtleUpgradeRegistryId() {
+    public final ResourceKey<Registry<UpgradeSerialiser<? extends ITurtleUpgrade>>> turtleUpgradeRegistryId() {
         return turtleUpgradeRegistryId;
     }
 
     @Override
-    public final ResourceKey<Registry<PocketUpgradeSerialiser<?>>> pocketUpgradeRegistryId() {
+    public final ResourceKey<Registry<UpgradeSerialiser<? extends IPocketUpgrade>>> pocketUpgradeRegistryId() {
         return pocketUpgradeRegistryId;
     }
 

projects/common/src/main/java/dan200/computercraft/impl/Peripherals.java

@@ -16,20 +16,18 @@ import javax.annotation.Nullable;
 
 /**
  * The registry for peripheral providers.
- * <p>
- * This lives in the {@code impl} package despite it not being part of the public API, in order to mirror Forge's class.
  */
 public final class Peripherals {
-    private static final GenericPeripheralProvider<Runnable> genericProvider = new GenericPeripheralProvider<>();
+    private static final GenericPeripheralProvider genericProvider = new GenericPeripheralProvider();
 
     private Peripherals() {
     }
 
-    public static void addGenericLookup(ComponentLookup<? super Runnable> lookup) {
+    public static void addGenericLookup(ComponentLookup lookup) {
         genericProvider.registerLookup(lookup);
     }
 
-    public static @Nullable IPeripheral getGenericPeripheral(ServerLevel level, BlockPos pos, Direction side, @Nullable BlockEntity blockEntity, Runnable invalidate) {
+    public static @Nullable IPeripheral getGenericPeripheral(ServerLevel level, BlockPos pos, Direction side, @Nullable BlockEntity blockEntity) {
-        return genericProvider.getPeripheral(level, pos, side, blockEntity, invalidate);
+        return genericProvider.getPeripheral(level, pos, side, blockEntity);
     }
 }

projects/common/src/main/java/dan200/computercraft/impl/PocketUpgrades.java

@@ -6,19 +6,18 @@ package dan200.computercraft.impl;
 
 import dan200.computercraft.api.ComputerCraftAPI;
 import dan200.computercraft.api.pocket.IPocketUpgrade;
-import dan200.computercraft.api.pocket.PocketUpgradeSerialiser;
 
 import java.util.stream.Stream;
 
 public final class PocketUpgrades {
-    private static final UpgradeManager<PocketUpgradeSerialiser<?>, IPocketUpgrade> registry = new UpgradeManager<>(
+    private static final UpgradeManager<IPocketUpgrade> registry = new UpgradeManager<>(
-        "pocket computer upgrade", "computercraft/pocket_upgrades", PocketUpgradeSerialiser.registryId()
+        "pocket computer upgrade", "computercraft/pocket_upgrades", IPocketUpgrade.serialiserRegistryKey()
     );
 
     private PocketUpgrades() {
     }
 
-    public static UpgradeManager<PocketUpgradeSerialiser<?>, IPocketUpgrade> instance() {
+    public static UpgradeManager<IPocketUpgrade> instance() {
         return registry;
     }
 

projects/common/src/main/java/dan200/computercraft/impl/TurtleUpgrades.java

@@ -6,19 +6,18 @@ package dan200.computercraft.impl;
 
 import dan200.computercraft.api.ComputerCraftAPI;
 import dan200.computercraft.api.turtle.ITurtleUpgrade;
-import dan200.computercraft.api.turtle.TurtleUpgradeSerialiser;
 
 import java.util.stream.Stream;
 
 public final class TurtleUpgrades {
-    private static final UpgradeManager<TurtleUpgradeSerialiser<?>, ITurtleUpgrade> registry = new UpgradeManager<>(
+    private static final UpgradeManager<ITurtleUpgrade> registry = new UpgradeManager<>(
-        "turtle upgrade", "computercraft/turtle_upgrades", TurtleUpgradeSerialiser.registryId()
+        "turtle upgrade", "computercraft/turtle_upgrades", ITurtleUpgrade.serialiserRegistryKey()
     );
 
     private TurtleUpgrades() {
     }
 
-    public static UpgradeManager<TurtleUpgradeSerialiser<?>, ITurtleUpgrade> instance() {
+    public static UpgradeManager<ITurtleUpgrade> instance() {
         return registry;
     }
 

projects/common/src/main/java/dan200/computercraft/impl/UpgradeManager.java

@@ -31,27 +31,26 @@ import java.util.stream.Collectors;
 /**
  * Manages turtle and pocket computer upgrades.
  *
- * @param <R> The type of upgrade serialisers.
  * @param <T> The type of upgrade.
  * @see TurtleUpgrades
  * @see PocketUpgrades
  */
-public class UpgradeManager<R extends UpgradeSerialiser<? extends T>, T extends UpgradeBase> extends SimpleJsonResourceReloadListener {
+public class UpgradeManager<T extends UpgradeBase> extends SimpleJsonResourceReloadListener {
     private static final Logger LOG = LoggerFactory.getLogger(UpgradeManager.class);
     private static final Gson GSON = new GsonBuilder().setPrettyPrinting().disableHtmlEscaping().create();
 
-    public record UpgradeWrapper<R extends UpgradeSerialiser<? extends T>, T extends UpgradeBase>(
+    public record UpgradeWrapper<T extends UpgradeBase>(
-        String id, T upgrade, R serialiser, String modId
+        String id, T upgrade, UpgradeSerialiser<? extends T> serialiser, String modId
     ) {
     }
 
     private final String kind;
-    private final ResourceKey<Registry<R>> registry;
+    private final ResourceKey<Registry<UpgradeSerialiser<? extends T>>> registry;
 
-    private Map<String, UpgradeWrapper<R, T>> current = Map.of();
+    private Map<String, UpgradeWrapper<T>> current = Map.of();
-    private Map<T, UpgradeWrapper<R, T>> currentWrappers = Map.of();
+    private Map<T, UpgradeWrapper<T>> currentWrappers = Map.of();
 
-    public UpgradeManager(String kind, String path, ResourceKey<Registry<R>> registry) {
+    public UpgradeManager(String kind, String path, ResourceKey<Registry<UpgradeSerialiser<? extends T>>> registry) {
         super(GSON, path);
         this.kind = kind;
         this.registry = registry;
@@ -64,7 +63,7 @@ public class UpgradeManager<R extends UpgradeSerialiser<? extends T>, T extends
     }
 
     @Nullable
-    public UpgradeWrapper<R, T> getWrapper(T upgrade) {
+    public UpgradeWrapper<T> getWrapper(T upgrade) {
         return currentWrappers.get(upgrade);
     }
 
@@ -92,16 +91,17 @@ public class UpgradeManager<R extends UpgradeSerialiser<? extends T>, T extends
         return currentWrappers.keySet();
     }
 
-    public Map<String, UpgradeWrapper<R, T>> getUpgradeWrappers() {
+    public Map<String, UpgradeWrapper<T>> getUpgradeWrappers() {
         return current;
     }
 
     @Override
     protected void apply(Map<ResourceLocation, JsonElement> upgrades, ResourceManager manager, ProfilerFiller profiler) {
-        Map<String, UpgradeWrapper<R, T>> newUpgrades = new HashMap<>();
+        var registry = RegistryHelper.getRegistry(this.registry);
+        Map<String, UpgradeWrapper<T>> newUpgrades = new HashMap<>();
         for (var element : upgrades.entrySet()) {
             try {
-                loadUpgrade(newUpgrades, element.getKey(), element.getValue());
+                loadUpgrade(registry, newUpgrades, element.getKey(), element.getValue());
             } catch (IllegalArgumentException | JsonParseException e) {
                 LOG.error("Error loading {} {} from JSON file", kind, element.getKey(), e);
             }
@@ -112,12 +112,12 @@ public class UpgradeManager<R extends UpgradeSerialiser<? extends T>, T extends
         LOG.info("Loaded {} {}s", current.size(), kind);
     }
 
-    private void loadUpgrade(Map<String, UpgradeWrapper<R, T>> current, ResourceLocation id, JsonElement json) {
+    private void loadUpgrade(Registry<UpgradeSerialiser<? extends T>> registry, Map<String, UpgradeWrapper<T>> current, ResourceLocation id, JsonElement json) {
         var root = GsonHelper.convertToJsonObject(json, "top element");
         if (!PlatformHelper.get().shouldLoadResource(root)) return;
 
         var serialiserId = new ResourceLocation(GsonHelper.getAsString(root, "type"));
-        var serialiser = PlatformHelper.get().tryGetRegistryObject(registry, serialiserId);
+        var serialiser = registry.get(serialiserId);
         if (serialiser == null) throw new JsonSyntaxException("Unknown upgrade type '" + serialiserId + "'");
 
         // TODO: Can we track which mod this resource came from and use that instead? It's theoretically possible,
@@ -130,11 +130,11 @@ public class UpgradeManager<R extends UpgradeSerialiser<? extends T>, T extends
             throw new IllegalArgumentException("Upgrade " + id + " from " + serialiser + " was incorrectly given id " + upgrade.getUpgradeID());
         }
 
-        var result = new UpgradeWrapper<R, T>(id.toString(), upgrade, serialiser, modId);
+        var result = new UpgradeWrapper<T>(id.toString(), upgrade, serialiser, modId);
         current.put(result.id(), result);
     }
 
-    public void loadFromNetwork(Map<String, UpgradeWrapper<R, T>> newUpgrades) {
+    public void loadFromNetwork(Map<String, UpgradeWrapper<T>> newUpgrades) {
         current = Collections.unmodifiableMap(newUpgrades);
         currentWrappers = newUpgrades.values().stream().collect(Collectors.toUnmodifiableMap(UpgradeWrapper::upgrade, x -> x));
     }

projects/common/src/main/java/dan200/computercraft/shared/CommonHooks.java

@@ -63,6 +63,12 @@ public final class CommonHooks {
         ComputerMBean.start(server);
     }
 
+    public static void onServerStarted(MinecraftServer server) {
+        // ItemDetails requires creative tabs to be populated, however by default this is done lazily on the client and
+        // not at all on the server! We instead do this once on server startup.
+        CreativeModeTabs.tryRebuildTabContents(server.getWorldData().enabledFeatures(), false, server.registryAccess());
+    }
+
     public static void onServerStopped() {
         resetState();
     }

projects/common/src/main/java/dan200/computercraft/shared/ModRegistry.java

@@ -5,13 +5,15 @@
 package dan200.computercraft.shared;
 
 import com.mojang.brigadier.arguments.ArgumentType;
+import com.mojang.serialization.Codec;
 import dan200.computercraft.api.ComputerCraftAPI;
 import dan200.computercraft.api.detail.DetailProvider;
 import dan200.computercraft.api.detail.VanillaDetailRegistries;
 import dan200.computercraft.api.media.IMedia;
-import dan200.computercraft.api.pocket.PocketUpgradeSerialiser;
+import dan200.computercraft.api.pocket.IPocketUpgrade;
-import dan200.computercraft.api.turtle.TurtleUpgradeSerialiser;
+import dan200.computercraft.api.turtle.ITurtleUpgrade;
 import dan200.computercraft.api.upgrades.UpgradeData;
+import dan200.computercraft.api.upgrades.UpgradeSerialiser;
 import dan200.computercraft.core.util.Colour;
 import dan200.computercraft.impl.PocketUpgrades;
 import dan200.computercraft.impl.TurtleUpgrades;
@@ -36,7 +38,6 @@ import dan200.computercraft.shared.computer.items.ComputerItem;
 import dan200.computercraft.shared.computer.recipe.ComputerUpgradeRecipe;
 import dan200.computercraft.shared.config.Config;
 import dan200.computercraft.shared.data.BlockNamedEntityLootCondition;
-import dan200.computercraft.shared.data.ConstantLootConditionSerializer;
 import dan200.computercraft.shared.data.HasComputerIdLootCondition;
 import dan200.computercraft.shared.data.PlayerCreativeLootCondition;
 import dan200.computercraft.shared.details.BlockDetails;
@@ -263,29 +264,29 @@ public final class ModRegistry {
     }
 
     public static class TurtleSerialisers {
-        static final RegistrationHelper<TurtleUpgradeSerialiser<?>> REGISTRY = PlatformHelper.get().createRegistrationHelper(TurtleUpgradeSerialiser.registryId());
+        static final RegistrationHelper<UpgradeSerialiser<? extends ITurtleUpgrade>> REGISTRY = PlatformHelper.get().createRegistrationHelper(ITurtleUpgrade.serialiserRegistryKey());
 
-        public static final RegistryEntry<TurtleUpgradeSerialiser<TurtleSpeaker>> SPEAKER =
+        public static final RegistryEntry<UpgradeSerialiser<TurtleSpeaker>> SPEAKER =
-            REGISTRY.register("speaker", () -> TurtleUpgradeSerialiser.simpleWithCustomItem(TurtleSpeaker::new));
+            REGISTRY.register("speaker", () -> UpgradeSerialiser.simpleWithCustomItem(TurtleSpeaker::new));
-        public static final RegistryEntry<TurtleUpgradeSerialiser<TurtleCraftingTable>> WORKBENCH =
+        public static final RegistryEntry<UpgradeSerialiser<TurtleCraftingTable>> WORKBENCH =
-            REGISTRY.register("workbench", () -> TurtleUpgradeSerialiser.simpleWithCustomItem(TurtleCraftingTable::new));
+            REGISTRY.register("workbench", () -> UpgradeSerialiser.simpleWithCustomItem(TurtleCraftingTable::new));
-        public static final RegistryEntry<TurtleUpgradeSerialiser<TurtleModem>> WIRELESS_MODEM_NORMAL =
+        public static final RegistryEntry<UpgradeSerialiser<TurtleModem>> WIRELESS_MODEM_NORMAL =
-            REGISTRY.register("wireless_modem_normal", () -> TurtleUpgradeSerialiser.simpleWithCustomItem((id, item) -> new TurtleModem(id, item, false)));
+            REGISTRY.register("wireless_modem_normal", () -> UpgradeSerialiser.simpleWithCustomItem((id, item) -> new TurtleModem(id, item, false)));
-        public static final RegistryEntry<TurtleUpgradeSerialiser<TurtleModem>> WIRELESS_MODEM_ADVANCED =
+        public static final RegistryEntry<UpgradeSerialiser<TurtleModem>> WIRELESS_MODEM_ADVANCED =
-            REGISTRY.register("wireless_modem_advanced", () -> TurtleUpgradeSerialiser.simpleWithCustomItem((id, item) -> new TurtleModem(id, item, true)));
+            REGISTRY.register("wireless_modem_advanced", () -> UpgradeSerialiser.simpleWithCustomItem((id, item) -> new TurtleModem(id, item, true)));
 
-        public static final RegistryEntry<TurtleUpgradeSerialiser<TurtleTool>> TOOL = REGISTRY.register("tool", () -> TurtleToolSerialiser.INSTANCE);
+        public static final RegistryEntry<UpgradeSerialiser<TurtleTool>> TOOL = REGISTRY.register("tool", () -> TurtleToolSerialiser.INSTANCE);
     }
 
     public static class PocketUpgradeSerialisers {
-        static final RegistrationHelper<PocketUpgradeSerialiser<?>> REGISTRY = PlatformHelper.get().createRegistrationHelper(PocketUpgradeSerialiser.registryId());
+        static final RegistrationHelper<UpgradeSerialiser<? extends IPocketUpgrade>> REGISTRY = PlatformHelper.get().createRegistrationHelper(IPocketUpgrade.serialiserRegistryKey());
 
-        public static final RegistryEntry<PocketUpgradeSerialiser<PocketSpeaker>> SPEAKER =
+        public static final RegistryEntry<UpgradeSerialiser<PocketSpeaker>> SPEAKER =
-            REGISTRY.register("speaker", () -> PocketUpgradeSerialiser.simpleWithCustomItem(PocketSpeaker::new));
+            REGISTRY.register("speaker", () -> UpgradeSerialiser.simpleWithCustomItem(PocketSpeaker::new));
-        public static final RegistryEntry<PocketUpgradeSerialiser<PocketModem>> WIRELESS_MODEM_NORMAL =
+        public static final RegistryEntry<UpgradeSerialiser<PocketModem>> WIRELESS_MODEM_NORMAL =
-            REGISTRY.register("wireless_modem_normal", () -> PocketUpgradeSerialiser.simpleWithCustomItem((id, item) -> new PocketModem(id, item, false)));
+            REGISTRY.register("wireless_modem_normal", () -> UpgradeSerialiser.simpleWithCustomItem((id, item) -> new PocketModem(id, item, false)));
-        public static final RegistryEntry<PocketUpgradeSerialiser<PocketModem>> WIRELESS_MODEM_ADVANCED =
+        public static final RegistryEntry<UpgradeSerialiser<PocketModem>> WIRELESS_MODEM_ADVANCED =
-            REGISTRY.register("wireless_modem_advanced", () -> PocketUpgradeSerialiser.simpleWithCustomItem((id, item) -> new PocketModem(id, item, true)));
+            REGISTRY.register("wireless_modem_advanced", () -> UpgradeSerialiser.simpleWithCustomItem((id, item) -> new PocketModem(id, item, true)));
     }
 
     public static class Menus {
@@ -347,13 +348,13 @@ public final class ModRegistry {
         static final RegistrationHelper<LootItemConditionType> REGISTRY = PlatformHelper.get().createRegistrationHelper(Registries.LOOT_CONDITION_TYPE);
 
         public static final RegistryEntry<LootItemConditionType> BLOCK_NAMED = REGISTRY.register("block_named",
-            () -> ConstantLootConditionSerializer.type(BlockNamedEntityLootCondition.INSTANCE));
+            () -> new LootItemConditionType(Codec.unit(BlockNamedEntityLootCondition.INSTANCE)));
 
         public static final RegistryEntry<LootItemConditionType> PLAYER_CREATIVE = REGISTRY.register("player_creative",
-            () -> ConstantLootConditionSerializer.type(PlayerCreativeLootCondition.INSTANCE));
+            () -> new LootItemConditionType(Codec.unit(PlayerCreativeLootCondition.INSTANCE)));
 
         public static final RegistryEntry<LootItemConditionType> HAS_ID = REGISTRY.register("has_id",
-            () -> ConstantLootConditionSerializer.type(HasComputerIdLootCondition.INSTANCE));
+            () -> new LootItemConditionType(Codec.unit(HasComputerIdLootCondition.INSTANCE)));
     }
 
     public static class RecipeSerializers {
@@ -466,8 +467,8 @@ public final class ModRegistry {
      * Register any objects which must be done on the main thread.
      */
     public static void registerMainThread() {
-        CauldronInteraction.WATER.put(Items.TURTLE_NORMAL.get(), TurtleItem.CAULDRON_INTERACTION);
+        CauldronInteraction.WATER.map().put(Items.TURTLE_NORMAL.get(), TurtleItem.CAULDRON_INTERACTION);
-        CauldronInteraction.WATER.put(Items.TURTLE_ADVANCED.get(), TurtleItem.CAULDRON_INTERACTION);
+        CauldronInteraction.WATER.map().put(Items.TURTLE_ADVANCED.get(), TurtleItem.CAULDRON_INTERACTION);
     }
 
     private static void addTurtle(CreativeModeTab.Output out, TurtleItem turtle) {

projects/common/src/main/java/dan200/computercraft/shared/command/arguments/ArgumentUtils.java

@@ -8,8 +8,9 @@ import com.google.gson.JsonObject;
 import com.mojang.brigadier.Message;
 import com.mojang.brigadier.arguments.ArgumentType;
 import com.mojang.brigadier.exceptions.SimpleCommandExceptionType;
-import dan200.computercraft.shared.platform.RegistryWrappers;
+import dan200.computercraft.impl.RegistryHelper;
 import net.minecraft.commands.synchronization.ArgumentTypeInfo;
+import net.minecraft.core.registries.BuiltInRegistries;
 import net.minecraft.network.FriendlyByteBuf;
 import net.minecraft.network.chat.Component;
 
@@ -24,7 +25,7 @@ public class ArgumentUtils {
     public static <A extends ArgumentType<?>> JsonObject serializeToJson(ArgumentTypeInfo.Template<A> template) {
         var object = new JsonObject();
         object.addProperty("type", "argument");
-        object.addProperty("parser", RegistryWrappers.COMMAND_ARGUMENT_TYPES.getKey(template.type()).toString());
+        object.addProperty("parser", RegistryHelper.getKeyOrThrow(BuiltInRegistries.COMMAND_ARGUMENT_TYPE, template.type()).toString());
 
         var properties = new JsonObject();
         serializeToJson(properties, template.type(), template);
@@ -44,12 +45,12 @@ public class ArgumentUtils {
 
     @SuppressWarnings("unchecked")
     private static <A extends ArgumentType<?>, T extends ArgumentTypeInfo.Template<A>> void serializeToNetwork(FriendlyByteBuf buffer, ArgumentTypeInfo<A, T> type, ArgumentTypeInfo.Template<A> template) {
-        buffer.writeId(RegistryWrappers.COMMAND_ARGUMENT_TYPES, type);
+        buffer.writeId(BuiltInRegistries.COMMAND_ARGUMENT_TYPE, type);
         type.serializeToNetwork((T) template, buffer);
     }
 
     public static ArgumentTypeInfo.Template<?> deserialize(FriendlyByteBuf buffer) {
-        var type = buffer.readById(RegistryWrappers.COMMAND_ARGUMENT_TYPES);
+        var type = buffer.readById(BuiltInRegistries.COMMAND_ARGUMENT_TYPE);
         Objects.requireNonNull(type, "Unknown argument type");
         return type.deserializeFromNetwork(buffer);
     }

projects/common/src/main/java/dan200/computercraft/shared/common/ClearColourRecipe.java

@@ -7,7 +7,6 @@ package dan200.computercraft.shared.common;
 import dan200.computercraft.shared.ModRegistry;
 import net.minecraft.core.NonNullList;
 import net.minecraft.core.RegistryAccess;
-import net.minecraft.resources.ResourceLocation;
 import net.minecraft.world.inventory.CraftingContainer;
 import net.minecraft.world.item.ItemStack;
 import net.minecraft.world.item.Items;
@@ -20,8 +19,8 @@ import net.minecraft.world.level.Level;
  * Craft a wet sponge with a {@linkplain IColouredItem dyable item} to remove its dye.
  */
 public final class ClearColourRecipe extends CustomRecipe {
-    public ClearColourRecipe(ResourceLocation id, CraftingBookCategory category) {
+    public ClearColourRecipe(CraftingBookCategory category) {
-        super(id, category);
+        super(category);
     }
 
     @Override

projects/common/src/main/java/dan200/computercraft/shared/common/ColourableRecipe.java

@@ -8,7 +8,6 @@ import dan200.computercraft.shared.ModRegistry;
 import dan200.computercraft.shared.util.ColourTracker;
 import dan200.computercraft.shared.util.ColourUtils;
 import net.minecraft.core.RegistryAccess;
-import net.minecraft.resources.ResourceLocation;
 import net.minecraft.world.inventory.CraftingContainer;
 import net.minecraft.world.item.ItemStack;
 import net.minecraft.world.item.crafting.CraftingBookCategory;
@@ -17,8 +16,8 @@ import net.minecraft.world.item.crafting.RecipeSerializer;
 import net.minecraft.world.level.Level;
 
 public final class ColourableRecipe extends CustomRecipe {
-    public ColourableRecipe(ResourceLocation id, CraftingBookCategory category) {
+    public ColourableRecipe(CraftingBookCategory category) {
-        super(id, category);
+        super(category);
     }
 
     @Override

projects/common/src/main/java/dan200/computercraft/shared/computer/apis/CommandAPI.java

@@ -56,14 +56,22 @@ public class CommandAPI implements ILuaAPI {
         var receiver = computer.getReceiver();
         try {
             receiver.clearOutput();
-            var result = commandManager.performPrefixedCommand(computer.getSource(), command);
+            var state = new CommandState();
-            return new Object[]{ result > 0, receiver.copyOutput(), result };
+            var source = computer.getSource().withCallback((success, x) -> {
+                if (success) state.successes++;
+            });
+            commandManager.performPrefixedCommand(source, command);
+            return new Object[]{ state.successes > 0, receiver.copyOutput(), state.successes };
         } catch (Throwable t) {
             LOG.error(Logging.JAVA_ERROR, "Error running command.", t);
             return new Object[]{ false, createOutput("Java Exception Thrown: " + t) };
         }
     }
 
+    private static final class CommandState {
+        int successes;
+    }
+
     private static Map<?, ?> getBlockInfo(Level world, BlockPos pos) {
         // Get the details of the block
         var block = new BlockReference(world, pos);

projects/common/src/main/java/dan200/computercraft/shared/computer/blocks/AbstractComputerBlock.java

@@ -99,7 +99,7 @@ public abstract class AbstractComputerBlock<T extends AbstractComputerBlockEntit
 
     @Override
     @Deprecated
-    public ItemStack getCloneItemStack(BlockGetter world, BlockPos pos, BlockState state) {
+    public ItemStack getCloneItemStack(LevelReader world, BlockPos pos, BlockState state) {
         var tile = world.getBlockEntity(pos);
         if (tile instanceof AbstractComputerBlockEntity computer) {
             var result = getItem(computer);
@@ -117,9 +117,9 @@ public abstract class AbstractComputerBlock<T extends AbstractComputerBlockEntit
     }
 
     @Override
-    public void playerWillDestroy(Level world, BlockPos pos, BlockState state, Player player) {
+    public BlockState playerWillDestroy(Level world, BlockPos pos, BlockState state, Player player) {
-        super.playerWillDestroy(world, pos, state, player);
+        var result = super.playerWillDestroy(world, pos, state, player);
-        if (!(world instanceof ServerLevel serverWorld)) return;
+        if (!(world instanceof ServerLevel serverWorld)) return result;
 
         // We drop the item here instead of doing it in the harvest method, as we should
         // drop computers for creative players too.
@@ -138,6 +138,8 @@ public abstract class AbstractComputerBlock<T extends AbstractComputerBlockEntit
 
             state.spawnAfterBreak(serverWorld, pos, player.getMainHandItem(), true);
         }
+
+        return result;
     }
 
     @Override

projects/common/src/main/java/dan200/computercraft/shared/computer/blocks/CommandComputerBlock.java

@@ -4,7 +4,10 @@
 
 package dan200.computercraft.shared.computer.blocks;
 
+import com.mojang.serialization.MapCodec;
+import com.mojang.serialization.codecs.RecordCodecBuilder;
 import dan200.computercraft.shared.platform.RegistryEntry;
+import dan200.computercraft.shared.util.BlockCodecs;
 import net.minecraft.world.level.block.GameMasterBlock;
 import net.minecraft.world.level.block.entity.BlockEntityType;
 
@@ -16,7 +19,17 @@ import net.minecraft.world.level.block.entity.BlockEntityType;
  * @see dan200.computercraft.shared.computer.items.CommandComputerItem
  */
 public class CommandComputerBlock<T extends CommandComputerBlockEntity> extends ComputerBlock<T> implements GameMasterBlock {
+    private static final MapCodec<CommandComputerBlock<?>> CODEC = RecordCodecBuilder.mapCodec(instance -> instance.group(
+        BlockCodecs.propertiesCodec(),
+        BlockCodecs.blockEntityCodec(x -> x.type)
+    ).apply(instance, CommandComputerBlock::new));
+
     public CommandComputerBlock(Properties settings, RegistryEntry<BlockEntityType<T>> type) {
         super(settings, type);
     }
+
+    @Override
+    protected MapCodec<? extends CommandComputerBlock<?>> codec() {
+        return CODEC;
+    }
 }

projects/common/src/main/java/dan200/computercraft/shared/computer/blocks/ComputerBlock.java

@@ -4,9 +4,12 @@
 
 package dan200.computercraft.shared.computer.blocks;
 
+import com.mojang.serialization.MapCodec;
+import com.mojang.serialization.codecs.RecordCodecBuilder;
 import dan200.computercraft.shared.computer.core.ComputerState;
 import dan200.computercraft.shared.computer.items.ComputerItem;
 import dan200.computercraft.shared.platform.RegistryEntry;
+import dan200.computercraft.shared.util.BlockCodecs;
 import net.minecraft.core.Direction;
 import net.minecraft.world.item.ItemStack;
 import net.minecraft.world.item.context.BlockPlaceContext;
@@ -21,6 +24,11 @@ import net.minecraft.world.level.block.state.properties.EnumProperty;
 import javax.annotation.Nullable;
 
 public class ComputerBlock<T extends ComputerBlockEntity> extends AbstractComputerBlock<T> {
+    private static final MapCodec<ComputerBlock<?>> CODEC = RecordCodecBuilder.mapCodec(instance -> instance.group(
+        BlockCodecs.propertiesCodec(),
+        BlockCodecs.blockEntityCodec(x -> x.type)
+    ).apply(instance, ComputerBlock::new));
+
     public static final EnumProperty<ComputerState> STATE = EnumProperty.create("state", ComputerState.class);
     public static final DirectionProperty FACING = BlockStateProperties.HORIZONTAL_FACING;
 
@@ -37,6 +45,11 @@ public class ComputerBlock<T extends ComputerBlockEntity> extends AbstractComput
         builder.add(FACING, STATE);
     }
 
+    @Override
+    protected MapCodec<? extends ComputerBlock<?>> codec() {
+        return CODEC;
+    }
+
     @Nullable
     @Override
     public BlockState getStateForPlacement(BlockPlaceContext placement) {

projects/common/src/main/java/dan200/computercraft/shared/computer/recipe/ComputerConvertRecipe.java

@@ -8,7 +8,6 @@ import dan200.computercraft.shared.computer.items.IComputerItem;
 import dan200.computercraft.shared.recipe.CustomShapedRecipe;
 import dan200.computercraft.shared.recipe.ShapedRecipeSpec;
 import net.minecraft.core.RegistryAccess;
-import net.minecraft.resources.ResourceLocation;
 import net.minecraft.world.inventory.CraftingContainer;
 import net.minecraft.world.item.ItemStack;
 import net.minecraft.world.level.Level;
@@ -17,8 +16,8 @@ import net.minecraft.world.level.Level;
  * A recipe which converts a computer from one form into another.
  */
 public abstract class ComputerConvertRecipe extends CustomShapedRecipe {
-    public ComputerConvertRecipe(ResourceLocation identifier, ShapedRecipeSpec recipe) {
+    public ComputerConvertRecipe(ShapedRecipeSpec recipe) {
-        super(identifier, recipe);
+        super(recipe);
     }
 
     protected abstract ItemStack convert(IComputerItem item, ItemStack stack);

projects/common/src/main/java/dan200/computercraft/shared/computer/recipe/ComputerUpgradeRecipe.java

@@ -8,7 +8,6 @@ import com.mojang.serialization.DataResult;
 import dan200.computercraft.shared.ModRegistry;
 import dan200.computercraft.shared.computer.items.IComputerItem;
 import dan200.computercraft.shared.recipe.ShapedRecipeSpec;
-import net.minecraft.resources.ResourceLocation;
 import net.minecraft.world.item.Item;
 import net.minecraft.world.item.ItemStack;
 import net.minecraft.world.item.crafting.RecipeSerializer;
@@ -22,17 +21,17 @@ import net.minecraft.world.item.crafting.RecipeSerializer;
 public final class ComputerUpgradeRecipe extends ComputerConvertRecipe {
     private final Item result;
 
-    private ComputerUpgradeRecipe(ResourceLocation identifier, ShapedRecipeSpec recipe) {
+    public ComputerUpgradeRecipe(ShapedRecipeSpec recipe) {
-        super(identifier, recipe);
+        super(recipe);
         this.result = recipe.result().getItem();
     }
 
-    public static DataResult<ComputerUpgradeRecipe> of(ResourceLocation id, ShapedRecipeSpec recipe) {
+    public static DataResult<ComputerUpgradeRecipe> of(ShapedRecipeSpec recipe) {
         if (!(recipe.result().getItem() instanceof IComputerItem)) {
             return DataResult.error(() -> recipe.result().getItem() + " is not a computer item");
         }
 
-        return DataResult.success(new ComputerUpgradeRecipe(id, recipe));
+        return DataResult.success(new ComputerUpgradeRecipe(recipe));
     }
 
     @Override

projects/common/src/main/java/dan200/computercraft/shared/data/ConstantLootConditionSerializer.java

@@ -1,33 +0,0 @@
-// SPDX-FileCopyrightText: 2019 The CC: Tweaked Developers
-//
-// SPDX-License-Identifier: MPL-2.0
-
-package dan200.computercraft.shared.data;
-
-import com.google.gson.JsonDeserializationContext;
-import com.google.gson.JsonObject;
-import com.google.gson.JsonSerializationContext;
-import net.minecraft.world.level.storage.loot.Serializer;
-import net.minecraft.world.level.storage.loot.predicates.LootItemCondition;
-import net.minecraft.world.level.storage.loot.predicates.LootItemConditionType;
-
-public final class ConstantLootConditionSerializer<T extends LootItemCondition> implements Serializer<T> {
-    private final T instance;
-
-    public ConstantLootConditionSerializer(T instance) {
-        this.instance = instance;
-    }
-
-    public static <T extends LootItemCondition> LootItemConditionType type(T condition) {
-        return new LootItemConditionType(new ConstantLootConditionSerializer<>(condition));
-    }
-
-    @Override
-    public void serialize(JsonObject json, T object, JsonSerializationContext context) {
-    }
-
-    @Override
-    public T deserialize(JsonObject json, JsonDeserializationContext context) {
-        return instance;
-    }
-}

projects/common/src/main/java/dan200/computercraft/shared/details/BlockDetails.java

@@ -5,7 +5,7 @@
 package dan200.computercraft.shared.details;
 
 import dan200.computercraft.api.detail.BlockReference;
-import dan200.computercraft.shared.platform.RegistryWrappers;
+import net.minecraft.core.registries.BuiltInRegistries;
 import net.minecraft.world.level.block.state.properties.Property;
 
 import java.util.HashMap;
@@ -15,7 +15,7 @@ public class BlockDetails {
     public static void fillBasic(Map<? super String, Object> data, BlockReference block) {
         var state = block.state();
 
-        data.put("name", DetailHelpers.getId(RegistryWrappers.BLOCKS, state.getBlock()));
+        data.put("name", DetailHelpers.getId(BuiltInRegistries.BLOCK, state.getBlock()));
 
         Map<Object, Object> stateTable = new HashMap<>();
         for (Map.Entry<Property<?>, ? extends Comparable<?>> entry : state.getValues().entrySet()) {

projects/common/src/main/java/dan200/computercraft/shared/details/DetailHelpers.java

@@ -4,8 +4,9 @@
 
 package dan200.computercraft.shared.details;
 
-import dan200.computercraft.shared.platform.RegistryWrappers;
+import dan200.computercraft.impl.RegistryHelper;
 import net.minecraft.core.Holder;
+import net.minecraft.core.Registry;
 import net.minecraft.tags.TagKey;
 
 import java.util.Map;
@@ -24,7 +25,7 @@ public final class DetailHelpers {
         return tags.collect(Collectors.toMap(x -> x.location().toString(), x -> true));
     }
 
-    public static <T> String getId(RegistryWrappers.RegistryWrapper<T> registry, T entry) {
+    public static <T> String getId(Registry<T> registry, T entry) {
-        return registry.getKey(entry).toString();
+        return RegistryHelper.getKeyOrThrow(registry, entry).toString();
     }
 }

projects/common/src/main/java/dan200/computercraft/shared/details/ItemDetails.java

@@ -5,11 +5,13 @@
 package dan200.computercraft.shared.details;
 
 import com.google.gson.JsonParseException;
-import dan200.computercraft.shared.platform.RegistryWrappers;
 import dan200.computercraft.shared.util.NBTUtil;
+import net.minecraft.core.registries.BuiltInRegistries;
 import net.minecraft.nbt.ListTag;
 import net.minecraft.nbt.Tag;
 import net.minecraft.network.chat.Component;
+import net.minecraft.world.item.CreativeModeTab;
+import net.minecraft.world.item.CreativeModeTabs;
 import net.minecraft.world.item.EnchantedBookItem;
 import net.minecraft.world.item.ItemStack;
 import net.minecraft.world.item.enchantment.EnchantmentHelper;
@@ -22,7 +24,7 @@ import java.util.*;
  */
 public class ItemDetails {
     public static void fillBasic(Map<? super String, Object> data, ItemStack stack) {
-        data.put("name", DetailHelpers.getId(RegistryWrappers.ITEMS, stack.getItem()));
+        data.put("name", DetailHelpers.getId(BuiltInRegistries.ITEM, stack.getItem()));
         data.put("count", stack.getCount());
         var hash = NBTUtil.getNBTHash(stack.getTag());
         if (hash != null) data.put("nbt", hash);
@@ -42,9 +44,7 @@ public class ItemDetails {
         }
 
         data.put("tags", DetailHelpers.getTags(stack.getTags()));
-
+        data.put("itemGroups", getItemGroups(stack));
-        // Include deprecated itemGroups field
-        data.put("itemGroups", List.of());
 
         var tag = stack.getTag();
         if (tag != null && tag.contains("display", Tag.TAG_COMPOUND)) {
@@ -83,6 +83,27 @@ public class ItemDetails {
         }
     }
 
+    /**
+     * Retrieve all item groups an item stack pertains to.
+     *
+     * @param stack Stack to analyse
+     * @return A filled list that contains pairs of item group IDs and their display names.
+     */
+    private static List<Map<String, Object>> getItemGroups(ItemStack stack) {
+        return CreativeModeTabs.allTabs().stream()
+            .filter(x -> x.shouldDisplay() && x.getType() == CreativeModeTab.Type.CATEGORY && x.contains(stack))
+            .map(group -> {
+                Map<String, Object> groupData = new HashMap<>(2);
+
+                var id = BuiltInRegistries.CREATIVE_MODE_TAB.getKey(group);
+                if (id != null) groupData.put("id", id.toString());
+
+                groupData.put("displayName", group.getDisplayName().getString());
+                return groupData;
+            })
+            .toList();
+    }
+
     /**
      * Retrieve all visible enchantments from given stack. Try to follow all tooltip rules : order and visibility.
      *
@@ -126,7 +147,7 @@ public class ItemDetails {
             var enchantment = entry.getKey();
             var level = entry.getValue();
             var enchant = new HashMap<String, Object>(3);
-            enchant.put("name", DetailHelpers.getId(RegistryWrappers.ENCHANTMENTS, enchantment));
+            enchant.put("name", DetailHelpers.getId(BuiltInRegistries.ENCHANTMENT, enchantment));
             enchant.put("level", level);
             enchant.put("displayName", enchantment.getFullname(level).getString());
             enchants.add(enchant);

projects/common/src/main/java/dan200/computercraft/shared/integration/UpgradeRecipeGenerator.java

@@ -4,7 +4,6 @@
 
 package dan200.computercraft.shared.integration;
 
-import dan200.computercraft.api.ComputerCraftAPI;
 import dan200.computercraft.api.pocket.IPocketUpgrade;
 import dan200.computercraft.api.turtle.ITurtleUpgrade;
 import dan200.computercraft.api.turtle.TurtleSide;
@@ -15,13 +14,12 @@ import dan200.computercraft.impl.TurtleUpgrades;
 import dan200.computercraft.shared.pocket.items.PocketComputerItem;
 import dan200.computercraft.shared.turtle.items.TurtleItem;
 import net.minecraft.core.NonNullList;
-import net.minecraft.resources.ResourceLocation;
 import net.minecraft.world.item.Item;
 import net.minecraft.world.item.ItemStack;
 import net.minecraft.world.item.crafting.CraftingBookCategory;
-import net.minecraft.world.item.crafting.CraftingRecipe;
 import net.minecraft.world.item.crafting.Ingredient;
 import net.minecraft.world.item.crafting.ShapedRecipe;
+import net.minecraft.world.item.crafting.ShapedRecipePattern;
 
 import javax.annotation.Nullable;
 import java.util.*;
@@ -38,17 +36,14 @@ import static dan200.computercraft.shared.integration.RecipeModHelpers.TURTLES;
  * @see RecipeModHelpers
  */
 public class UpgradeRecipeGenerator<T> {
-    private static final ResourceLocation TURTLE_UPGRADE = new ResourceLocation(ComputerCraftAPI.MOD_ID, "turtle_upgrade");
+    private final Function<ShapedRecipe, T> wrap;
-    private static final ResourceLocation POCKET_UPGRADE = new ResourceLocation(ComputerCraftAPI.MOD_ID, "pocket_upgrade");
-
-    private final Function<CraftingRecipe, T> wrap;
 
     private final Map<Item, List<UpgradeInfo>> upgradeItemLookup = new HashMap<>();
     private final List<UpgradeInfo> pocketUpgrades = new ArrayList<>();
     private final List<UpgradeInfo> turtleUpgrades = new ArrayList<>();
     private boolean initialised = false;
 
-    public UpgradeRecipeGenerator(Function<CraftingRecipe, T> wrap) {
+    public UpgradeRecipeGenerator(Function<ShapedRecipe, T> wrap) {
         this.wrap = wrap;
     }
 
@@ -235,11 +230,19 @@ public class UpgradeRecipeGenerator<T> {
     }
 
     private T pocket(Ingredient upgrade, Ingredient pocketComputer, ItemStack result) {
-        return wrap.apply(new ShapedRecipe(POCKET_UPGRADE, "", CraftingBookCategory.MISC, 1, 2, NonNullList.of(Ingredient.EMPTY, upgrade, pocketComputer), result));
+        return wrap.apply(new ShapedRecipe(
+            "", CraftingBookCategory.MISC,
+            new ShapedRecipePattern(1, 2, NonNullList.of(Ingredient.EMPTY, upgrade, pocketComputer), Optional.empty()),
+            result
+        ));
     }
 
     private T turtle(Ingredient left, Ingredient right, ItemStack result) {
-        return wrap.apply(new ShapedRecipe(TURTLE_UPGRADE, "", CraftingBookCategory.MISC, 2, 1, NonNullList.of(Ingredient.EMPTY, left, right), result));
+        return wrap.apply(new ShapedRecipe(
+            "", CraftingBookCategory.MISC,
+            new ShapedRecipePattern(2, 1, NonNullList.of(Ingredient.EMPTY, left, right), Optional.empty()),
+            result
+        ));
     }
 
     private class UpgradeInfo {

projects/common/src/main/java/dan200/computercraft/shared/integration/jei/JEIComputerCraft.java

@@ -60,7 +60,7 @@ public class JEIComputerCraft implements IModPlugin {
         // Hide all upgrade recipes
         var category = registry.createRecipeLookup(RecipeTypes.CRAFTING);
         category.get().forEach(wrapper -> {
-            if (RecipeModHelpers.shouldRemoveRecipe(wrapper.getId())) {
+            if (RecipeModHelpers.shouldRemoveRecipe(wrapper.id())) {
                 registry.hideRecipes(RecipeTypes.CRAFTING, List.of(wrapper));
             }
         });

projects/common/src/main/java/dan200/computercraft/shared/media/recipes/DiskRecipe.java

@@ -11,7 +11,6 @@ import dan200.computercraft.shared.platform.PlatformHelper;
 import dan200.computercraft.shared.util.ColourTracker;
 import dan200.computercraft.shared.util.ColourUtils;
 import net.minecraft.core.RegistryAccess;
-import net.minecraft.resources.ResourceLocation;
 import net.minecraft.world.inventory.CraftingContainer;
 import net.minecraft.world.item.ItemStack;
 import net.minecraft.world.item.Items;
@@ -24,8 +23,8 @@ import net.minecraft.world.level.Level;
 public class DiskRecipe extends CustomRecipe {
     private final Ingredient redstone;
 
-    public DiskRecipe(ResourceLocation id, CraftingBookCategory category) {
+    public DiskRecipe(CraftingBookCategory category) {
-        super(id, category);
+        super(category);
         redstone = PlatformHelper.get().getRecipeIngredients().redstone();
     }
 

projects/common/src/main/java/dan200/computercraft/shared/media/recipes/PrintoutRecipe.java

@@ -8,7 +8,6 @@ import dan200.computercraft.shared.ModRegistry;
 import dan200.computercraft.shared.media.items.PrintoutItem;
 import dan200.computercraft.shared.platform.PlatformHelper;
 import net.minecraft.core.RegistryAccess;
-import net.minecraft.resources.ResourceLocation;
 import net.minecraft.world.inventory.CraftingContainer;
 import net.minecraft.world.item.ItemStack;
 import net.minecraft.world.item.Items;
@@ -22,8 +21,8 @@ public final class PrintoutRecipe extends CustomRecipe {
     private final Ingredient leather;
     private final Ingredient string;
 
-    public PrintoutRecipe(ResourceLocation id, CraftingBookCategory category) {
+    public PrintoutRecipe(CraftingBookCategory category) {
-        super(id, category);
+        super(category);
 
         var ingredients = PlatformHelper.get().getRecipeIngredients();
         leather = ingredients.leather();

projects/common/src/main/java/dan200/computercraft/shared/network/MessageType.java

@@ -4,6 +4,9 @@
 
 package dan200.computercraft.shared.network;
 
+import net.minecraft.network.protocol.common.custom.CustomPacketPayload;
+import net.minecraft.resources.ResourceLocation;
+
 /**
  * A type of message to send over the network.
  * <p>
@@ -15,4 +18,11 @@ package dan200.computercraft.shared.network;
  * @see NetworkMessage#type()
  */
 public interface MessageType<T extends NetworkMessage<?>> {
+    /**
+     * Get the id of this message type. This will be used as the custom packet channel name.
+     *
+     * @return The id of this message type.
+     * @see CustomPacketPayload#id()
+     */
+    ResourceLocation id();
 }

projects/common/src/main/java/dan200/computercraft/shared/network/NetworkMessages.java

@@ -8,8 +8,6 @@ import dan200.computercraft.api.ComputerCraftAPI;
 import dan200.computercraft.shared.network.client.*;
 import dan200.computercraft.shared.network.server.*;
 import dan200.computercraft.shared.platform.PlatformHelper;
-import it.unimi.dsi.fastutil.ints.IntOpenHashSet;
-import it.unimi.dsi.fastutil.ints.IntSet;
 import net.minecraft.network.FriendlyByteBuf;
 import net.minecraft.resources.ResourceLocation;
 
@@ -21,50 +19,48 @@ import java.util.*;
  * @see PlatformHelper The platform helper is used to send packets.
  */
 public final class NetworkMessages {
-    private static final IntSet seenIds = new IntOpenHashSet();
     private static final Set<String> seenChannel = new HashSet<>();
     private static final List<MessageType<? extends NetworkMessage<ServerNetworkContext>>> serverMessages = new ArrayList<>();
     private static final List<MessageType<? extends NetworkMessage<ClientNetworkContext>>> clientMessages = new ArrayList<>();
 
-    public static final MessageType<ComputerActionServerMessage> COMPUTER_ACTION = registerServerbound(0, "computer_action", ComputerActionServerMessage.class, ComputerActionServerMessage::new);
+    public static final MessageType<ComputerActionServerMessage> COMPUTER_ACTION = registerServerbound("computer_action", ComputerActionServerMessage::new);
-    public static final MessageType<QueueEventServerMessage> QUEUE_EVENT = registerServerbound(1, "queue_event", QueueEventServerMessage.class, QueueEventServerMessage::new);
+    public static final MessageType<QueueEventServerMessage> QUEUE_EVENT = registerServerbound("queue_event", QueueEventServerMessage::new);
-    public static final MessageType<KeyEventServerMessage> KEY_EVENT = registerServerbound(2, "key_event", KeyEventServerMessage.class, KeyEventServerMessage::new);
+    public static final MessageType<KeyEventServerMessage> KEY_EVENT = registerServerbound("key_event", KeyEventServerMessage::new);
-    public static final MessageType<MouseEventServerMessage> MOUSE_EVENT = registerServerbound(3, "mouse_event", MouseEventServerMessage.class, MouseEventServerMessage::new);
+    public static final MessageType<MouseEventServerMessage> MOUSE_EVENT = registerServerbound("mouse_event", MouseEventServerMessage::new);
-    public static final MessageType<UploadFileMessage> UPLOAD_FILE = registerServerbound(4, "upload_file", UploadFileMessage.class, UploadFileMessage::new);
+    public static final MessageType<UploadFileMessage> UPLOAD_FILE = registerServerbound("upload_file", UploadFileMessage::new);
 
-    public static final MessageType<ChatTableClientMessage> CHAT_TABLE = registerClientbound(10, "chat_table", ChatTableClientMessage.class, ChatTableClientMessage::new);
+    public static final MessageType<ChatTableClientMessage> CHAT_TABLE = registerClientbound("chat_table", ChatTableClientMessage::new);
-    public static final MessageType<PocketComputerDataMessage> POCKET_COMPUTER_DATA = registerClientbound(11, "pocket_computer_data", PocketComputerDataMessage.class, PocketComputerDataMessage::new);
+    public static final MessageType<PocketComputerDataMessage> POCKET_COMPUTER_DATA = registerClientbound("pocket_computer_data", PocketComputerDataMessage::new);
-    public static final MessageType<PocketComputerDeletedClientMessage> POCKET_COMPUTER_DELETED = registerClientbound(12, "pocket_computer_deleted", PocketComputerDeletedClientMessage.class, PocketComputerDeletedClientMessage::new);
+    public static final MessageType<PocketComputerDeletedClientMessage> POCKET_COMPUTER_DELETED = registerClientbound("pocket_computer_deleted", PocketComputerDeletedClientMessage::new);
-    public static final MessageType<ComputerTerminalClientMessage> COMPUTER_TERMINAL = registerClientbound(13, "computer_terminal", ComputerTerminalClientMessage.class, ComputerTerminalClientMessage::new);
+    public static final MessageType<ComputerTerminalClientMessage> COMPUTER_TERMINAL = registerClientbound("computer_terminal", ComputerTerminalClientMessage::new);
-    public static final MessageType<PlayRecordClientMessage> PLAY_RECORD = registerClientbound(14, "play_record", PlayRecordClientMessage.class, PlayRecordClientMessage::new);
+    public static final MessageType<PlayRecordClientMessage> PLAY_RECORD = registerClientbound("play_record", PlayRecordClientMessage::new);
-    public static final MessageType<MonitorClientMessage> MONITOR_CLIENT = registerClientbound(15, "monitor_client", MonitorClientMessage.class, MonitorClientMessage::new);
+    public static final MessageType<MonitorClientMessage> MONITOR_CLIENT = registerClientbound("monitor_client", MonitorClientMessage::new);
-    public static final MessageType<SpeakerAudioClientMessage> SPEAKER_AUDIO = registerClientbound(16, "speaker_audio", SpeakerAudioClientMessage.class, SpeakerAudioClientMessage::new);
+    public static final MessageType<SpeakerAudioClientMessage> SPEAKER_AUDIO = registerClientbound("speaker_audio", SpeakerAudioClientMessage::new);
-    public static final MessageType<SpeakerMoveClientMessage> SPEAKER_MOVE = registerClientbound(17, "speaker_move", SpeakerMoveClientMessage.class, SpeakerMoveClientMessage::new);
+    public static final MessageType<SpeakerMoveClientMessage> SPEAKER_MOVE = registerClientbound("speaker_move", SpeakerMoveClientMessage::new);
-    public static final MessageType<SpeakerPlayClientMessage> SPEAKER_PLAY = registerClientbound(18, "speaker_play", SpeakerPlayClientMessage.class, SpeakerPlayClientMessage::new);
+    public static final MessageType<SpeakerPlayClientMessage> SPEAKER_PLAY = registerClientbound("speaker_play", SpeakerPlayClientMessage::new);
-    public static final MessageType<SpeakerStopClientMessage> SPEAKER_STOP = registerClientbound(19, "speaker_stop", SpeakerStopClientMessage.class, SpeakerStopClientMessage::new);
+    public static final MessageType<SpeakerStopClientMessage> SPEAKER_STOP = registerClientbound("speaker_stop", SpeakerStopClientMessage::new);
-    public static final MessageType<UploadResultMessage> UPLOAD_RESULT = registerClientbound(20, "upload_result", UploadResultMessage.class, UploadResultMessage::new);
+    public static final MessageType<UploadResultMessage> UPLOAD_RESULT = registerClientbound("upload_result", UploadResultMessage::new);
-    public static final MessageType<UpgradesLoadedMessage> UPGRADES_LOADED = registerClientbound(21, "upgrades_loaded", UpgradesLoadedMessage.class, UpgradesLoadedMessage::new);
+    public static final MessageType<UpgradesLoadedMessage> UPGRADES_LOADED = registerClientbound("upgrades_loaded", UpgradesLoadedMessage::new);
 
     private NetworkMessages() {
     }
 
     private static <C, T extends NetworkMessage<C>> MessageType<T> register(
         List<MessageType<? extends NetworkMessage<C>>> messages,
-        int id, String channel, Class<T> klass, FriendlyByteBuf.Reader<T> reader
+        String channel, FriendlyByteBuf.Reader<T> reader
     ) {
-        if (!seenIds.add(id)) throw new IllegalArgumentException("Duplicate id " + id);
         if (!seenChannel.add(channel)) throw new IllegalArgumentException("Duplicate channel " + channel);
-        var type = PlatformHelper.get().createMessageType(id, new ResourceLocation(ComputerCraftAPI.MOD_ID, channel), klass, reader);
+        var type = PlatformHelper.get().createMessageType(new ResourceLocation(ComputerCraftAPI.MOD_ID, channel), reader);
         messages.add(type);
         return type;
     }
 
-    private static <T extends NetworkMessage<ServerNetworkContext>> MessageType<T> registerServerbound(int id, String channel, Class<T> klass, FriendlyByteBuf.Reader<T> reader) {
+    private static <T extends NetworkMessage<ServerNetworkContext>> MessageType<T> registerServerbound(String id, FriendlyByteBuf.Reader<T> reader) {
-        return register(serverMessages, id, channel, klass, reader);
+        return register(serverMessages, id, reader);
     }
 
-    private static <T extends NetworkMessage<ClientNetworkContext>> MessageType<T> registerClientbound(int id, String channel, Class<T> klass, FriendlyByteBuf.Reader<T> reader) {
+    private static <T extends NetworkMessage<ClientNetworkContext>> MessageType<T> registerClientbound(String id, FriendlyByteBuf.Reader<T> reader) {
-        return register(clientMessages, id, channel, klass, reader);
+        return register(clientMessages, id, reader);
     }
 
     /**

projects/common/src/main/java/dan200/computercraft/shared/network/client/UpgradesLoadedMessage.java

@@ -5,18 +5,16 @@
 package dan200.computercraft.shared.network.client;
 
 import dan200.computercraft.api.pocket.IPocketUpgrade;
-import dan200.computercraft.api.pocket.PocketUpgradeSerialiser;
 import dan200.computercraft.api.turtle.ITurtleUpgrade;
-import dan200.computercraft.api.turtle.TurtleUpgradeSerialiser;
 import dan200.computercraft.api.upgrades.UpgradeBase;
 import dan200.computercraft.api.upgrades.UpgradeSerialiser;
 import dan200.computercraft.impl.PocketUpgrades;
+import dan200.computercraft.impl.RegistryHelper;
 import dan200.computercraft.impl.TurtleUpgrades;
 import dan200.computercraft.impl.UpgradeManager;
 import dan200.computercraft.shared.network.MessageType;
 import dan200.computercraft.shared.network.NetworkMessage;
 import dan200.computercraft.shared.network.NetworkMessages;
-import dan200.computercraft.shared.platform.PlatformHelper;
 import net.minecraft.core.Registry;
 import net.minecraft.network.FriendlyByteBuf;
 import net.minecraft.resources.ResourceKey;
@@ -24,14 +22,13 @@ import net.minecraft.resources.ResourceLocation;
 
 import java.util.HashMap;
 import java.util.Map;
-import java.util.Objects;
 
 /**
  * Syncs turtle and pocket upgrades to the client.
  */
 public final class UpgradesLoadedMessage implements NetworkMessage<ClientNetworkContext> {
-    private final Map<String, UpgradeManager.UpgradeWrapper<TurtleUpgradeSerialiser<?>, ITurtleUpgrade>> turtleUpgrades;
+    private final Map<String, UpgradeManager.UpgradeWrapper<ITurtleUpgrade>> turtleUpgrades;
-    private final Map<String, UpgradeManager.UpgradeWrapper<PocketUpgradeSerialiser<?>, IPocketUpgrade>> pocketUpgrades;
+    private final Map<String, UpgradeManager.UpgradeWrapper<IPocketUpgrade>> pocketUpgrades;
 
     public UpgradesLoadedMessage() {
         turtleUpgrades = TurtleUpgrades.instance().getUpgradeWrappers();
@@ -39,28 +36,28 @@ public final class UpgradesLoadedMessage implements NetworkMessage<ClientNetwork
     }
 
     public UpgradesLoadedMessage(FriendlyByteBuf buf) {
-        turtleUpgrades = fromBytes(buf, TurtleUpgradeSerialiser.registryId());
+        turtleUpgrades = fromBytes(buf, ITurtleUpgrade.serialiserRegistryKey());
-        pocketUpgrades = fromBytes(buf, PocketUpgradeSerialiser.registryId());
+        pocketUpgrades = fromBytes(buf, IPocketUpgrade.serialiserRegistryKey());
     }
 
-    private <R extends UpgradeSerialiser<? extends T>, T extends UpgradeBase> Map<String, UpgradeManager.UpgradeWrapper<R, T>> fromBytes(
+    private <T extends UpgradeBase> Map<String, UpgradeManager.UpgradeWrapper<T>> fromBytes(
-        FriendlyByteBuf buf, ResourceKey<Registry<R>> registryKey
+        FriendlyByteBuf buf, ResourceKey<Registry<UpgradeSerialiser<? extends T>>> registryKey
     ) {
-        var registry = PlatformHelper.get().wrap(registryKey);
+        var registry = RegistryHelper.getRegistry(registryKey);
 
         var size = buf.readVarInt();
-        Map<String, UpgradeManager.UpgradeWrapper<R, T>> upgrades = new HashMap<>(size);
+        Map<String, UpgradeManager.UpgradeWrapper<T>> upgrades = new HashMap<>(size);
         for (var i = 0; i < size; i++) {
             var id = buf.readUtf();
 
             var serialiserId = buf.readResourceLocation();
-            var serialiser = registry.tryGet(serialiserId);
+            var serialiser = registry.get(serialiserId);
             if (serialiser == null) throw new IllegalStateException("Unknown serialiser " + serialiserId);
 
             var upgrade = serialiser.fromNetwork(new ResourceLocation(id), buf);
             var modId = buf.readUtf();
 
-            upgrades.put(id, new UpgradeManager.UpgradeWrapper<R, T>(id, upgrade, serialiser, modId));
+            upgrades.put(id, new UpgradeManager.UpgradeWrapper<T>(id, upgrade, serialiser, modId));
         }
 
         return upgrades;
@@ -68,14 +65,14 @@ public final class UpgradesLoadedMessage implements NetworkMessage<ClientNetwork
 
     @Override
     public void write(FriendlyByteBuf buf) {
-        toBytes(buf, TurtleUpgradeSerialiser.registryId(), turtleUpgrades);
+        toBytes(buf, ITurtleUpgrade.serialiserRegistryKey(), turtleUpgrades);
-        toBytes(buf, PocketUpgradeSerialiser.registryId(), pocketUpgrades);
+        toBytes(buf, IPocketUpgrade.serialiserRegistryKey(), pocketUpgrades);
     }
 
-    private <R extends UpgradeSerialiser<? extends T>, T extends UpgradeBase> void toBytes(
+    private <T extends UpgradeBase> void toBytes(
-        FriendlyByteBuf buf, ResourceKey<Registry<R>> registryKey, Map<String, UpgradeManager.UpgradeWrapper<R, T>> upgrades
+        FriendlyByteBuf buf, ResourceKey<Registry<UpgradeSerialiser<? extends T>>> registryKey, Map<String, UpgradeManager.UpgradeWrapper<T>> upgrades
     ) {
-        var registry = PlatformHelper.get().wrap(registryKey);
+        var registry = RegistryHelper.getRegistry(registryKey);
 
         buf.writeVarInt(upgrades.size());
         for (var entry : upgrades.entrySet()) {
@@ -85,7 +82,7 @@ public final class UpgradesLoadedMessage implements NetworkMessage<ClientNetwork
             @SuppressWarnings("unchecked")
             var unwrappedSerialiser = (UpgradeSerialiser<T>) serialiser;
 
-            buf.writeResourceLocation(Objects.requireNonNull(registry.getKey(serialiser), "Serialiser is not registered!"));
+            buf.writeResourceLocation(RegistryHelper.getKeyOrThrow(registry, serialiser));
             unwrappedSerialiser.toNetwork(buf, entry.getValue().upgrade());
 
             buf.writeUtf(entry.getValue().modId());

projects/common/src/main/java/dan200/computercraft/shared/peripheral/diskdrive/DiskDriveBlock.java

@@ -4,6 +4,7 @@
 
 package dan200.computercraft.shared.peripheral.diskdrive;
 
+import com.mojang.serialization.MapCodec;
 import dan200.computercraft.impl.MediaProviders;
 import dan200.computercraft.shared.ModRegistry;
 import dan200.computercraft.shared.common.HorizontalContainerBlock;
@@ -26,6 +27,8 @@ import net.minecraft.world.phys.BlockHitResult;
 import javax.annotation.Nullable;
 
 public class DiskDriveBlock extends HorizontalContainerBlock {
+    private static final MapCodec<DiskDriveBlock> CODEC = simpleCodec(DiskDriveBlock::new);
+
     public static final EnumProperty<DiskDriveState> STATE = EnumProperty.create("state", DiskDriveState.class);
 
     private static final BlockEntityTicker<DiskDriveBlockEntity> serverTicker = (level, pos, state, drive) -> drive.serverTick();
@@ -43,6 +46,11 @@ public class DiskDriveBlock extends HorizontalContainerBlock {
         properties.add(FACING, STATE);
     }
 
+    @Override
+    protected MapCodec<? extends BaseEntityBlock> codec() {
+        return CODEC;
+    }
+
     @Override
     @Deprecated
     public InteractionResult use(BlockState state, Level level, BlockPos pos, Player player, InteractionHand hand, BlockHitResult hit) {

projects/common/src/main/java/dan200/computercraft/shared/peripheral/generic/ComponentLookup.java

@@ -15,10 +15,8 @@ import javax.annotation.Nullable;
 /**
  * Extract some component (for instance a capability on Forge, or a {@code BlockApiLookup} on Fabric) from a block and
  * block entity.
- *
- * @param <C> A platform-specific type, used for the invalidation callback.
  */
-public interface ComponentLookup<C extends Runnable> {
+public interface ComponentLookup {
     /**
      * Extract some component from a block in the world.
      *
@@ -28,9 +26,8 @@ public interface ComponentLookup<C extends Runnable> {
      * @param blockEntity The block entity at that position.
      * @param side        The side of the block to extract the component from. Implementations should try to use a
      *                    sideless lookup first, but may fall back to a sided lookup if needed.
-     * @param invalidate  An invalidation function to call if this component changes.
      * @return The found component, or {@code null} if not present.
      */
     @Nullable
-    Object find(ServerLevel level, BlockPos pos, BlockState state, BlockEntity blockEntity, Direction side, C invalidate);
+    Object find(ServerLevel level, BlockPos pos, BlockState state, BlockEntity blockEntity, Direction side);
 }

projects/common/src/main/java/dan200/computercraft/shared/peripheral/generic/GenericPeripheral.java

@@ -11,8 +11,9 @@ import dan200.computercraft.api.lua.MethodResult;
 import dan200.computercraft.api.peripheral.IComputerAccess;
 import dan200.computercraft.api.peripheral.IDynamicPeripheral;
 import dan200.computercraft.api.peripheral.IPeripheral;
-import dan200.computercraft.shared.platform.RegistryWrappers;
+import dan200.computercraft.impl.RegistryHelper;
 import net.minecraft.core.Direction;
+import net.minecraft.core.registries.BuiltInRegistries;
 import net.minecraft.world.level.block.entity.BlockEntity;
 
 import javax.annotation.Nullable;
@@ -29,7 +30,7 @@ public final class GenericPeripheral implements IDynamicPeripheral {
 
     GenericPeripheral(BlockEntity tile, Direction side, @Nullable String name, Set<String> additionalTypes, List<SaturatedMethod> methods) {
         this.side = side;
-        var type = RegistryWrappers.BLOCK_ENTITY_TYPES.getKey(tile.getType());
+        var type = RegistryHelper.getKeyOrThrow(BuiltInRegistries.BLOCK_ENTITY_TYPE, tile.getType());
         this.tile = tile;
         this.type = name != null ? name : type.toString();
         this.additionalTypes = additionalTypes;

projects/common/src/main/java/dan200/computercraft/shared/peripheral/generic/GenericPeripheralProvider.java

@@ -13,8 +13,6 @@ import net.minecraft.core.BlockPos;
 import net.minecraft.core.Direction;
 import net.minecraft.server.level.ServerLevel;
 import net.minecraft.world.level.block.entity.BlockEntity;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 
 import javax.annotation.Nullable;
 import java.util.ArrayList;
@@ -25,39 +23,35 @@ import java.util.Objects;
  * A peripheral provider which finds methods from various {@linkplain GenericSource generic sources}.
  * <p>
  * Methods are found using the original block entity itself and a registered list of {@link ComponentLookup}s.
- *
- * @param <C> A platform-specific type, used for the invalidation callback.
  */
-public final class GenericPeripheralProvider<C extends Runnable> {
+public final class GenericPeripheralProvider {
-    private static final Logger LOG = LoggerFactory.getLogger(GenericPeripheralProvider.class);
+    private final List<ComponentLookup> lookups = new ArrayList<>();
-
-    private final List<ComponentLookup<? super C>> lookups = new ArrayList<>();
 
     /**
      * Register a component lookup function.
      *
      * @param lookup The component lookup function.
      */
-    public synchronized void registerLookup(ComponentLookup<? super C> lookup) {
+    public synchronized void registerLookup(ComponentLookup lookup) {
         Objects.requireNonNull(lookup);
         if (!lookups.contains(lookup)) lookups.add(lookup);
     }
 
-    public void forEachMethod(MethodSupplier<PeripheralMethod> methods, ServerLevel level, BlockPos pos, Direction side, BlockEntity blockEntity, C invalidate, MethodSupplier.TargetedConsumer<PeripheralMethod> consumer) {
+    public void forEachMethod(MethodSupplier<PeripheralMethod> methods, ServerLevel level, BlockPos pos, Direction side, BlockEntity blockEntity, MethodSupplier.TargetedConsumer<PeripheralMethod> consumer) {
         methods.forEachMethod(blockEntity, consumer);
 
         for (var lookup : lookups) {
-            var contents = lookup.find(level, pos, blockEntity.getBlockState(), blockEntity, side, invalidate);
+            var contents = lookup.find(level, pos, blockEntity.getBlockState(), blockEntity, side);
             if (contents != null) methods.forEachMethod(contents, consumer);
         }
     }
 
     @Nullable
-    public IPeripheral getPeripheral(ServerLevel level, BlockPos pos, Direction side, @Nullable BlockEntity blockEntity, C invalidate) {
+    public IPeripheral getPeripheral(ServerLevel level, BlockPos pos, Direction side, @Nullable BlockEntity blockEntity) {
         if (blockEntity == null) return null;
 
         var builder = new GenericPeripheralBuilder();
-        forEachMethod(ServerContext.get(level.getServer()).peripheralMethods(), level, pos, side, blockEntity, invalidate, builder::addMethod);
+        forEachMethod(ServerContext.get(level.getServer()).peripheralMethods(), level, pos, side, blockEntity, builder::addMethod);
         return builder.toPeripheral(blockEntity, side);
     }
 }

projects/common/src/main/java/dan200/computercraft/shared/peripheral/generic/methods/AbstractInventoryMethods.java

@@ -75,17 +75,14 @@ public abstract class AbstractInventoryMethods<T> implements GenericPeripheral {
      * <p>
      * The returned information contains the same information as each item in
      * {@link #list}, as well as additional details like the display name
-     * (`displayName`), and item and item durability (`damage`, `maxDamage`, `durability`).
+     * (`displayName`), item groups (`itemGroups`), which are the creative tabs
+     * an item will appear under, and item and item durability (`damage`,
+     * `maxDamage`, `durability`).
      * <p>
      * Some items include more information (such as enchantments) - it is
      * recommended to print it out using [`textutils.serialize`] or in the Lua
      * REPL, to explore what is available.
      * <p>
-     * > [Deprecated fields][!INFO]
-     * > Older versions of CC: Tweaked exposed an {@code itemGroups} field, listing the
-     * > creative tabs an item was available under. This information is no longer available on
-     * > more recent versions of the game, and so this field will always be empty. Do not use this
-     * > field in new code!
      *
      * @param inventory The current inventory.
      * @param slot      The slot to get information about.

projects/common/src/main/java/dan200/computercraft/shared/peripheral/modem/wired/CableBlock.java

@@ -140,12 +140,12 @@ public class CableBlock extends Block implements SimpleWaterloggedBlock, EntityB
 
     @Override
     @Deprecated
-    public ItemStack getCloneItemStack(BlockGetter world, BlockPos pos, BlockState state) {
+    public ItemStack getCloneItemStack(LevelReader world, BlockPos pos, BlockState state) {
         return state.getValue(CABLE) ? new ItemStack(ModRegistry.Items.CABLE.get()) : new ItemStack(ModRegistry.Items.WIRED_MODEM.get());
     }
 
     @ForgeOverride
-    public ItemStack getCloneItemStack(BlockState state, @Nullable HitResult hit, BlockGetter world, BlockPos pos, Player player) {
+    public ItemStack getCloneItemStack(BlockState state, @Nullable HitResult hit, LevelReader world, BlockPos pos, Player player) {
         var modem = state.getValue(MODEM).getFacing();
         boolean cable = state.getValue(CABLE);
 

projects/common/src/main/java/dan200/computercraft/shared/peripheral/modem/wired/CableBlockEntity.java

@@ -60,7 +60,6 @@ public class CableBlockEntity extends BlockEntity {
     private boolean invalidPeripheral;
     private boolean peripheralAccessAllowed;
     private final WiredModemLocalPeripheral peripheral = new WiredModemLocalPeripheral(PlatformHelper.get().createPeripheralAccess(this, x -> queueRefreshPeripheral()));
-    private @Nullable Runnable modemChanged;
 
     private boolean connectionsFormed = false;
     private boolean connectionsChanged = false;
@@ -121,7 +120,7 @@ public class CableBlockEntity extends BlockEntity {
         super.setBlockState(state);
 
         // We invalidate both the modem and element if the modem's direction is different.
-        if (getMaybeDirection() != direction && modemChanged != null) modemChanged.run();
+        if (getMaybeDirection() != direction) PlatformHelper.get().invalidateComponent(this);
     }
 
     @Nullable
@@ -273,7 +272,7 @@ public class CableBlockEntity extends BlockEntity {
 
     void modemChanged() {
         // Tell anyone who cares that the connection state has changed
-        if (modemChanged != null) modemChanged.run();
+        PlatformHelper.get().invalidateComponent(this);
 
         if (getLevel().isClientSide) return;
 
@@ -326,10 +325,6 @@ public class CableBlockEntity extends BlockEntity {
         return direction == null || getMaybeDirection() == direction ? modem : null;
     }
 
-    public void onModemChanged(Runnable callback) {
-        modemChanged = callback;
-    }
-
     boolean hasCable() {
         return getBlockState().getValue(CableBlock.CABLE);
     }

projects/common/src/main/java/dan200/computercraft/shared/peripheral/modem/wired/CableBlockItem.java

@@ -4,10 +4,11 @@
 
 package dan200.computercraft.shared.peripheral.modem.wired;
 
+import dan200.computercraft.impl.RegistryHelper;
 import dan200.computercraft.shared.ModRegistry;
-import dan200.computercraft.shared.platform.RegistryWrappers;
 import net.minecraft.Util;
 import net.minecraft.core.BlockPos;
+import net.minecraft.core.registries.BuiltInRegistries;
 import net.minecraft.sounds.SoundSource;
 import net.minecraft.world.InteractionResult;
 import net.minecraft.world.item.BlockItem;
@@ -50,7 +51,7 @@ public abstract class CableBlockItem extends BlockItem {
     @Override
     public String getDescriptionId() {
         if (translationKey == null) {
-            translationKey = Util.makeDescriptionId("block", RegistryWrappers.ITEMS.getKey(this));
+            translationKey = Util.makeDescriptionId("block", RegistryHelper.getKeyOrThrow(BuiltInRegistries.ITEM, this));
         }
         return translationKey;
     }

projects/common/src/main/java/dan200/computercraft/shared/peripheral/modem/wireless/WirelessModemBlock.java

@@ -4,8 +4,10 @@
 
 package dan200.computercraft.shared.peripheral.modem.wireless;
 
+import com.mojang.serialization.MapCodec;
 import dan200.computercraft.shared.peripheral.modem.ModemShapes;
 import dan200.computercraft.shared.platform.RegistryEntry;
+import dan200.computercraft.shared.util.BlockCodecs;
 import dan200.computercraft.shared.util.WaterloggableHelpers;
 import net.minecraft.core.BlockPos;
 import net.minecraft.core.Direction;
@@ -31,6 +33,8 @@ import static dan200.computercraft.shared.util.WaterloggableHelpers.WATERLOGGED;
 import static dan200.computercraft.shared.util.WaterloggableHelpers.getFluidStateForPlacement;
 
 public class WirelessModemBlock extends DirectionalBlock implements SimpleWaterloggedBlock, EntityBlock {
+    private static final MapCodec<WirelessModemBlock> CODEC = BlockCodecs.blockWithBlockEntityCodec(WirelessModemBlock::new, x -> x.type);
+
     public static final BooleanProperty ON = BooleanProperty.create("on");
 
     private final RegistryEntry<? extends BlockEntityType<? extends WirelessModemBlockEntity>> type;
@@ -50,6 +54,11 @@ public class WirelessModemBlock extends DirectionalBlock implements SimpleWaterl
         builder.add(FACING, ON, WATERLOGGED);
     }
 
+    @Override
+    protected MapCodec<? extends WirelessModemBlock> codec() {
+        return CODEC;
+    }
+
     @Override
     @Deprecated
     public VoxelShape getShape(BlockState blockState, BlockGetter blockView, BlockPos blockPos, CollisionContext context) {

projects/common/src/main/java/dan200/computercraft/shared/peripheral/modem/wireless/WirelessModemBlockEntity.java

@@ -7,6 +7,7 @@ package dan200.computercraft.shared.peripheral.modem.wireless;
 import dan200.computercraft.api.peripheral.IPeripheral;
 import dan200.computercraft.shared.peripheral.modem.ModemPeripheral;
 import dan200.computercraft.shared.peripheral.modem.ModemState;
+import dan200.computercraft.shared.platform.PlatformHelper;
 import dan200.computercraft.shared.util.TickScheduler;
 import net.minecraft.core.BlockPos;
 import net.minecraft.core.Direction;
@@ -51,7 +52,6 @@ public class WirelessModemBlockEntity extends BlockEntity {
     private final boolean advanced;
 
     private final ModemPeripheral modem;
-    private @Nullable Runnable modemChanged;
     private final TickScheduler.Token tickToken = new TickScheduler.Token(this);
 
     public WirelessModemBlockEntity(BlockEntityType<? extends WirelessModemBlockEntity> type, BlockPos pos, BlockState state, boolean advanced) {
@@ -77,7 +77,7 @@ public class WirelessModemBlockEntity extends BlockEntity {
     public void setBlockState(BlockState state) {
         var direction = getDirection();
         super.setBlockState(state);
-        if (getDirection() != direction && modemChanged != null) modemChanged.run();
+        if (getDirection() != direction) PlatformHelper.get().invalidateComponent(this);
     }
 
     void blockTick() {
@@ -100,8 +100,4 @@ public class WirelessModemBlockEntity extends BlockEntity {
     public IPeripheral getPeripheral(@Nullable Direction direction) {
         return direction == null || getDirection() == direction ? modem : null;
     }
-
-    public void onModemChanged(Runnable callback) {
-        modemChanged = callback;
-    }
 }

projects/common/src/main/java/dan200/computercraft/shared/peripheral/monitor/MonitorBlock.java

@@ -4,8 +4,10 @@
 
 package dan200.computercraft.shared.peripheral.monitor;
 
+import com.mojang.serialization.MapCodec;
 import dan200.computercraft.shared.platform.PlatformHelper;
 import dan200.computercraft.shared.platform.RegistryEntry;
+import dan200.computercraft.shared.util.BlockCodecs;
 import net.minecraft.core.BlockPos;
 import net.minecraft.core.Direction;
 import net.minecraft.server.level.ServerLevel;
@@ -33,6 +35,8 @@ import net.minecraft.world.phys.BlockHitResult;
 import javax.annotation.Nullable;
 
 public class MonitorBlock extends HorizontalDirectionalBlock implements EntityBlock {
+    private static final MapCodec<MonitorBlock> CODEC = BlockCodecs.blockWithBlockEntityCodec(MonitorBlock::new, x -> x.type);
+
     public static final DirectionProperty ORIENTATION = DirectionProperty.create("orientation",
         Direction.UP, Direction.DOWN, Direction.NORTH);
 
@@ -57,6 +61,11 @@ public class MonitorBlock extends HorizontalDirectionalBlock implements EntityBl
         builder.add(ORIENTATION, FACING, STATE);
     }
 
+    @Override
+    protected MapCodec<? extends MonitorBlock> codec() {
+        return CODEC;
+    }
+
     @Override
     @Nullable
     public BlockState getStateForPlacement(BlockPlaceContext context) {

projects/common/src/main/java/dan200/computercraft/shared/peripheral/monitor/MonitorBlockEntity.java

@@ -5,7 +5,6 @@
 package dan200.computercraft.shared.peripheral.monitor;
 
 import com.google.common.annotations.VisibleForTesting;
-import dan200.computercraft.annotations.ForgeOverride;
 import dan200.computercraft.api.peripheral.IComputerAccess;
 import dan200.computercraft.api.peripheral.IPeripheral;
 import dan200.computercraft.core.terminal.Terminal;
@@ -507,7 +506,6 @@ public class MonitorBlockEntity extends BlockEntity {
         computers.remove(computer);
     }
 
-    @ForgeOverride
     public AABB getRenderBoundingBox() {
         // We attempt to cache the bounding box to save having to do property lookups (and allocations!) on every frame.
         // Unfortunately the AABB does depend on quite a lot of state, so we need to add a bunch of extra fields -

projects/common/src/main/java/dan200/computercraft/shared/peripheral/printer/PrinterBlock.java

@@ -4,10 +4,12 @@
 
 package dan200.computercraft.shared.peripheral.printer;
 
+import com.mojang.serialization.MapCodec;
 import dan200.computercraft.shared.ModRegistry;
 import dan200.computercraft.shared.common.HorizontalContainerBlock;
 import net.minecraft.core.BlockPos;
 import net.minecraft.core.Direction;
+import net.minecraft.world.level.block.BaseEntityBlock;
 import net.minecraft.world.level.block.Block;
 import net.minecraft.world.level.block.entity.BlockEntity;
 import net.minecraft.world.level.block.state.BlockState;
@@ -17,6 +19,8 @@ import net.minecraft.world.level.block.state.properties.BooleanProperty;
 import javax.annotation.Nullable;
 
 public class PrinterBlock extends HorizontalContainerBlock {
+    private static final MapCodec<PrinterBlock> CODEC = simpleCodec(PrinterBlock::new);
+
     public static final BooleanProperty TOP = BooleanProperty.create("top");
     public static final BooleanProperty BOTTOM = BooleanProperty.create("bottom");
 
@@ -33,6 +37,11 @@ public class PrinterBlock extends HorizontalContainerBlock {
         properties.add(FACING, TOP, BOTTOM);
     }
 
+    @Override
+    protected MapCodec<? extends BaseEntityBlock> codec() {
+        return CODEC;
+    }
+
     @Nullable
     @Override
     public BlockEntity newBlockEntity(BlockPos pos, BlockState state) {

projects/common/src/main/java/dan200/computercraft/shared/peripheral/speaker/SpeakerBlock.java

@@ -4,6 +4,7 @@
 
 package dan200.computercraft.shared.peripheral.speaker;
 
+import com.mojang.serialization.MapCodec;
 import dan200.computercraft.shared.ModRegistry;
 import dan200.computercraft.shared.util.BlockEntityHelpers;
 import net.minecraft.core.BlockPos;
@@ -22,6 +23,7 @@ import net.minecraft.world.level.block.state.StateDefinition;
 import javax.annotation.Nullable;
 
 public class SpeakerBlock extends HorizontalDirectionalBlock implements EntityBlock {
+    private static final MapCodec<SpeakerBlock> CODEC = simpleCodec(SpeakerBlock::new);
     private static final BlockEntityTicker<SpeakerBlockEntity> serverTicker = (level, pos, state, drive) -> drive.serverTick();
 
     public SpeakerBlock(Properties settings) {
@@ -35,6 +37,11 @@ public class SpeakerBlock extends HorizontalDirectionalBlock implements EntityBl
         properties.add(FACING);
     }
 
+    @Override
+    protected MapCodec<? extends SpeakerBlock> codec() {
+        return CODEC;
+    }
+
     @Nullable
     @Override
     public BlockState getStateForPlacement(BlockPlaceContext placement) {

projects/common/src/main/java/dan200/computercraft/shared/platform/PlatformHelper.java

@@ -21,7 +21,7 @@ import net.minecraft.core.Direction;
 import net.minecraft.core.Registry;
 import net.minecraft.network.FriendlyByteBuf;
 import net.minecraft.network.protocol.Packet;
-import net.minecraft.network.protocol.game.ClientGamePacketListener;
+import net.minecraft.network.protocol.common.ClientCommonPacketListener;
 import net.minecraft.resources.ResourceKey;
 import net.minecraft.resources.ResourceLocation;
 import net.minecraft.server.level.ServerLevel;
@@ -83,15 +83,6 @@ public interface PlatformHelper extends dan200.computercraft.impl.PlatformHelper
      */
     ConfigFile.Builder createConfigBuilder();
 
-    /**
-     * Wrap a Minecraft registry in our own abstraction layer.
-     *
-     * @param registry The registry to wrap.
-     * @param <T>      The type of object stored in this registry.
-     * @return The wrapped registry.
-     */
-    <T> RegistryWrappers.RegistryWrapper<T> wrap(ResourceKey<Registry<T>> registry);
-
     /**
      * Create a registration helper for a specific registry.
      *
@@ -101,17 +92,6 @@ public interface PlatformHelper extends dan200.computercraft.impl.PlatformHelper
      */
     <T> RegistrationHelper<T> createRegistrationHelper(ResourceKey<Registry<T>> registry);
 
-    /**
-     * A version of {@link #getRegistryObject(ResourceKey, ResourceLocation)} which allows missing entries.
-     *
-     * @param registry The registry to look up this object in.
-     * @param id       The ID to look up.
-     * @param <T>      The type of object the registry stores.
-     * @return The registered object or {@code null}.
-     */
-    @Nullable
-    <T> T tryGetRegistryObject(ResourceKey<Registry<T>> registry, ResourceLocation id);
-
     /**
      * Determine if this resource should be loaded, based on platform-specific loot conditions.
      * <p>
@@ -167,14 +147,12 @@ public interface PlatformHelper extends dan200.computercraft.impl.PlatformHelper
     /**
      * Create a new {@link MessageType}.
      *
-     * @param id      The descriminator for this message type.
+     * @param <T>    The type of this message.
-     * @param channel The channel name for this message type.
+     * @param id     The id for this message type.
-     * @param klass   The type of this message.
+     * @param reader The function which reads the packet from a buffer. Should be the inverse to {@link NetworkMessage#write(FriendlyByteBuf)}.
-     * @param reader  The function which reads the packet from a buffer. Should be the inverse to {@link NetworkMessage#write(FriendlyByteBuf)}.
-     * @param <T>     The type of this message.
      * @return The new {@link MessageType} instance.
      */
-    <T extends NetworkMessage<?>> MessageType<T> createMessageType(int id, ResourceLocation channel, Class<T> klass, FriendlyByteBuf.Reader<T> reader);
+    <T extends NetworkMessage<?>> MessageType<T> createMessageType(ResourceLocation id, FriendlyByteBuf.Reader<T> reader);
 
     /**
      * Convert a clientbound {@link NetworkMessage} to a Minecraft {@link Packet}.
@@ -182,7 +160,15 @@ public interface PlatformHelper extends dan200.computercraft.impl.PlatformHelper
      * @param message The messsge to convert.
      * @return The converted message.
      */
-    Packet<ClientGamePacketListener> createPacket(NetworkMessage<ClientNetworkContext> message);
+    Packet<ClientCommonPacketListener> createPacket(NetworkMessage<ClientNetworkContext> message);
+
+    /**
+     * Invalidate components on a block enitty.
+     *
+     * @param owner The block entity whose components should be invalidated.
+     */
+    default void invalidateComponent(BlockEntity owner) {
+    }
 
     /**
      * Create a {@link ComponentAccess} for surrounding peripherals.
@@ -334,7 +320,7 @@ public interface PlatformHelper extends dan200.computercraft.impl.PlatformHelper
      * @return The distance (in blocks) that a player can reach.
      */
     default double getReachDistance(Player player) {
-        return player.isCreative() ? 5 : 4.5;
+        return Player.getPickRange(player.isCreative());
     }
 
     /**

projects/common/src/main/java/dan200/computercraft/shared/platform/RegistryEntry.java

@@ -4,8 +4,13 @@
 
 package dan200.computercraft.shared.platform;
 
+import com.mojang.serialization.Codec;
+import com.mojang.serialization.DataResult;
+import net.minecraft.core.Holder;
 import net.minecraft.core.Registry;
+import net.minecraft.resources.ResourceKey;
 import net.minecraft.resources.ResourceLocation;
+import net.minecraft.util.ExtraCodecs;
 
 import java.util.function.Supplier;
 
@@ -22,4 +27,22 @@ public interface RegistryEntry<U> extends Supplier<U> {
      * @return This registered item.
      */
     ResourceLocation id();
+
+    static <T> Codec<RegistryEntry<? extends T>> codec(Registry<T> registry) {
+        record HolderEntry<T>(ResourceLocation id, Holder<T> holder) implements RegistryEntry<T> {
+            @Override
+            public T get() {
+                return holder().value();
+            }
+        }
+        Codec<RegistryEntry<? extends T>> codec = ResourceLocation.CODEC.flatXmap(
+            id -> registry
+                .getHolder(ResourceKey.create(registry.key(), id))
+                .map(x -> DataResult.success(new HolderEntry<>(id, x)))
+                .orElseGet(() -> DataResult.error(() -> "Unknown registry key in " + registry.key() + ": " + id)),
+            holder -> DataResult.success(holder.id())
+        );
+
+        return ExtraCodecs.overrideLifecycle(codec, x -> registry.lifecycle(x.get()), x -> registry.lifecycle(x.get()));
+    }
 }

projects/common/src/main/java/dan200/computercraft/shared/platform/RegistryWrappers.java

@@ -1,62 +0,0 @@
-// SPDX-FileCopyrightText: 2022 The CC: Tweaked Developers
-//
-// SPDX-License-Identifier: MPL-2.0
-
-package dan200.computercraft.shared.platform;
-
-import net.minecraft.commands.synchronization.ArgumentTypeInfo;
-import net.minecraft.core.IdMap;
-import net.minecraft.core.Registry;
-import net.minecraft.core.registries.Registries;
-import net.minecraft.network.FriendlyByteBuf;
-import net.minecraft.resources.ResourceLocation;
-import net.minecraft.world.inventory.MenuType;
-import net.minecraft.world.item.Item;
-import net.minecraft.world.item.crafting.RecipeSerializer;
-import net.minecraft.world.item.enchantment.Enchantment;
-import net.minecraft.world.level.block.Block;
-import net.minecraft.world.level.block.entity.BlockEntityType;
-import net.minecraft.world.level.material.Fluid;
-
-import javax.annotation.Nullable;
-import java.util.stream.Stream;
-import java.util.stream.StreamSupport;
-
-/**
- * Mimics {@link Registry} but using {@link PlatformHelper}'s recipe abstractions.
- */
-public final class RegistryWrappers {
-    public static final RegistryWrapper<Item> ITEMS = PlatformHelper.get().wrap(Registries.ITEM);
-    public static final RegistryWrapper<Block> BLOCKS = PlatformHelper.get().wrap(Registries.BLOCK);
-    public static final RegistryWrapper<BlockEntityType<?>> BLOCK_ENTITY_TYPES = PlatformHelper.get().wrap(Registries.BLOCK_ENTITY_TYPE);
-    public static final RegistryWrapper<Fluid> FLUIDS = PlatformHelper.get().wrap(Registries.FLUID);
-    public static final RegistryWrapper<Enchantment> ENCHANTMENTS = PlatformHelper.get().wrap(Registries.ENCHANTMENT);
-    public static final RegistryWrapper<ArgumentTypeInfo<?, ?>> COMMAND_ARGUMENT_TYPES = PlatformHelper.get().wrap(Registries.COMMAND_ARGUMENT_TYPE);
-    public static final RegistryWrapper<RecipeSerializer<?>> RECIPE_SERIALIZERS = PlatformHelper.get().wrap(Registries.RECIPE_SERIALIZER);
-    public static final RegistryWrapper<MenuType<?>> MENU = PlatformHelper.get().wrap(Registries.MENU);
-
-    public interface RegistryWrapper<T> extends IdMap<T> {
-        ResourceLocation getKey(T object);
-
-        T get(ResourceLocation location);
-
-        @Nullable
-        T tryGet(ResourceLocation location);
-
-        default Stream<T> stream() {
-            return StreamSupport.stream(spliterator(), false);
-        }
-    }
-
-    private RegistryWrappers() {
-    }
-
-    public static <K> void writeKey(FriendlyByteBuf buf, RegistryWrapper<K> registry, K object) {
-        buf.writeResourceLocation(registry.getKey(object));
-    }
-
-    public static <K> K readKey(FriendlyByteBuf buf, RegistryWrapper<K> registry) {
-        var id = buf.readResourceLocation();
-        return registry.get(id);
-    }
-}

projects/common/src/main/java/dan200/computercraft/shared/pocket/core/PocketServerComputer.java

@@ -4,7 +4,6 @@
 
 package dan200.computercraft.shared.pocket.core;
 
-import dan200.computercraft.api.peripheral.IPeripheral;
 import dan200.computercraft.api.pocket.IPocketAccess;
 import dan200.computercraft.api.pocket.IPocketUpgrade;
 import dan200.computercraft.api.upgrades.UpgradeData;
@@ -19,7 +18,6 @@ import dan200.computercraft.shared.network.server.ServerNetworking;
 import dan200.computercraft.shared.pocket.items.PocketComputerItem;
 import net.minecraft.core.BlockPos;
 import net.minecraft.nbt.CompoundTag;
-import net.minecraft.resources.ResourceLocation;
 import net.minecraft.server.level.ServerLevel;
 import net.minecraft.server.level.ServerPlayer;
 import net.minecraft.world.entity.Entity;
@@ -29,7 +27,10 @@ import net.minecraft.world.entity.player.Player;
 import net.minecraft.world.item.ItemStack;
 
 import javax.annotation.Nullable;
-import java.util.*;
+import java.util.ArrayList;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
 
 public class PocketServerComputer extends ServerComputer implements IPocketAccess {
     private @Nullable IPocketUpgrade upgrade;
@@ -104,12 +105,6 @@ public class PocketServerComputer extends ServerComputer implements IPocketAcces
         setPeripheral(ComputerSide.BACK, peripheral);
     }
 
-    @Override
-    @Deprecated(forRemoval = true)
-    public Map<ResourceLocation, IPeripheral> getUpgrades() {
-        return upgrade == null ? Map.of() : Collections.singletonMap(upgrade.getUpgradeID(), getPeripheral(ComputerSide.BACK));
-    }
-
     public @Nullable UpgradeData<IPocketUpgrade> getUpgrade() {
         return upgrade == null ? null : UpgradeData.of(upgrade, getUpgradeNBTData());
     }

projects/common/src/main/java/dan200/computercraft/shared/pocket/recipes/PocketComputerUpgradeRecipe.java

@@ -10,7 +10,6 @@ import dan200.computercraft.impl.PocketUpgrades;
 import dan200.computercraft.shared.ModRegistry;
 import dan200.computercraft.shared.pocket.items.PocketComputerItem;
 import net.minecraft.core.RegistryAccess;
-import net.minecraft.resources.ResourceLocation;
 import net.minecraft.world.inventory.CraftingContainer;
 import net.minecraft.world.item.ItemStack;
 import net.minecraft.world.item.crafting.CraftingBookCategory;
@@ -19,8 +18,8 @@ import net.minecraft.world.item.crafting.RecipeSerializer;
 import net.minecraft.world.level.Level;
 
 public final class PocketComputerUpgradeRecipe extends CustomRecipe {
-    public PocketComputerUpgradeRecipe(ResourceLocation identifier, CraftingBookCategory category) {
+    public PocketComputerUpgradeRecipe(CraftingBookCategory category) {
-        super(identifier, category);
+        super(category);
     }
 
     @Override