Bump CC:T to 1.108.3

Fix crash when joining a dedicated server
We can't use FriendlyByte.readCollection to read to a pre-allocated/array-backed NonNullList, as that doesn't implement List.add. Instead, we just need to do a normal loop. We add a couple of tests to round-trip our recipe specs. Unfortunately we can't test the recipes themselves as our own registries aren't set up, so this'll have to do for now.
2025-11-03 23:22:59 +00:00 · 2023-10-08 15:25:45 +01:00 · 2023-10-08 15:22:32 +01:00 · 2023-10-08 13:27:24 +01:00 · 2023-10-08 13:14:02 +01:00 · 2023-10-03 18:20:44 +01:00
276 changed files with 7603 additions and 3639 deletions
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -44,7 +44,7 @@ repos:
    name: Check Java codestyle
    files: ".*\\.java$"
    language: system
-    entry: ./gradlew checkstyleMain checkstyleTest
+    entry: ./gradlew checkstyle
    pass_filenames: false
    require_serial: true
  - id: illuaminate
--- a/.reuse/dep5
+++ b/.reuse/dep5
@@ -10,8 +10,8 @@ Files:
  projects/common/src/testMod/resources/data/cctest/structures/*
  projects/fabric/src/generated/*
  projects/forge/src/generated/*
-  projects/web/src/export/index.json
-  projects/web/src/export/items/minecraft/*
+  projects/web/src/htmlTransform/export/index.json
+  projects/web/src/htmlTransform/export/items/minecraft/*
 Comment: Generated/data files are CC0.
 Copyright: The CC: Tweaked Developers
 License: CC0-1.0
@@ -37,10 +37,10 @@ Files:
  projects/fabric/src/testMod/resources/computercraft-gametest.fabric.mixins.json
  projects/fabric/src/testMod/resources/fabric.mod.json
  projects/forge/src/client/resources/computercraft-client.forge.mixins.json
-  projects/web/src/mount/.settings
-  projects/web/src/mount/example.nfp
-  projects/web/src/mount/example.nft
-  projects/web/src/mount/expr_template.lua
+  projects/web/src/frontend/mount/.settings
+  projects/web/src/frontend/mount/example.nfp
+  projects/web/src/frontend/mount/example.nft
+  projects/web/src/frontend/mount/expr_template.lua
  projects/web/tsconfig.json
 Comment: Several assets where it's inconvenient to create a .license file.
 Copyright: The CC: Tweaked Developers
@@ -56,7 +56,7 @@ Files:
  projects/core/src/main/resources/data/computercraft/lua/rom/autorun/.ignoreme
  projects/core/src/main/resources/data/computercraft/lua/rom/help/*
  projects/core/src/main/resources/data/computercraft/lua/rom/programs/fun/advanced/levels/*
-  projects/web/src/export/items/computercraft/*
+  projects/web/src/htmlTransform/export/items/computercraft/*
 Comment: Bulk-license original assets as CCPL.
 Copyright: 2011 Daniel Ratcliffe
 License: LicenseRef-CCPL
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -100,7 +100,6 @@ about how you can build on that until you've covered everything!
 [new-issue]: https://github.com/cc-tweaked/CC-Tweaked/issues/new/choose "Create a new issue"
 [community]: README.md#community "Get in touch with the community."
 [Adoptium]: https://adoptium.net/temurin/releases?version=17 "Download OpenJDK 17"
-[checkstyle]: https://checkstyle.org/
 [illuaminate]: https://github.com/SquidDev/illuaminate/ "Illuaminate on GitHub"
 [weblate]: https://i18n.tweaked.cc/projects/cc-tweaked/minecraft/ "CC: Tweaked weblate instance"
 [docs]: https://tweaked.cc/ "CC: Tweaked documentation"
--- a/buildSrc/build.gradle.kts
+++ b/buildSrc/build.gradle.kts
@@ -52,7 +52,7 @@ dependencies {
    implementation(libs.forgeGradle)
    implementation(libs.librarian)
    implementation(libs.minotaur)
-    implementation(libs.quiltflower)
+    implementation(libs.vineflower)
    implementation(libs.vanillaGradle)
 }

--- a/buildSrc/src/main/kotlin/cc-tweaked.fabric.gradle.kts
+++ b/buildSrc/src/main/kotlin/cc-tweaked.fabric.gradle.kts
@@ -12,7 +12,7 @@ import cc.tweaked.gradle.MinecraftConfigurations
 plugins {
    `java-library`
    id("fabric-loom")
-    id("io.github.juuxel.loom-quiltflower")
+    id("io.github.juuxel.loom-vineflower")
    id("cc-tweaked.java-convention")
 }

--- a/buildSrc/src/main/kotlin/cc-tweaked.java-convention.gradle.kts
+++ b/buildSrc/src/main/kotlin/cc-tweaked.java-convention.gradle.kts
@@ -66,6 +66,7 @@ repositories {
            includeGroup("me.shedaniel.cloth")
            includeGroup("me.shedaniel")
            includeGroup("mezz.jei")
+            includeGroup("org.teavm")
            includeModule("com.terraformersmc", "modmenu")
            includeModule("me.lucko", "fabric-permissions-api")
        }
@@ -99,7 +100,10 @@ sourceSets.all {
            check("FutureReturnValueIgnored", CheckSeverity.OFF) // Too many false positives with Netty

            check("NullAway", CheckSeverity.ERROR)
-            option("NullAway:AnnotatedPackages", listOf("dan200.computercraft", "net.fabricmc.fabric.api").joinToString(","))
+            option(
+                "NullAway:AnnotatedPackages",
+                listOf("dan200.computercraft", "cc.tweaked", "net.fabricmc.fabric.api").joinToString(","),
+            )
            option("NullAway:ExcludedFieldAnnotations", listOf("org.spongepowered.asm.mixin.Shadow").joinToString(","))
            option("NullAway:CastToNonNullMethod", "dan200.computercraft.core.util.Nullability.assertNonNull")
            option("NullAway:CheckOptionalEmptiness")
@@ -174,6 +178,12 @@ project.plugins.withType(CCTweakedPlugin::class.java) {
    }
 }

+tasks.register("checkstyle") {
+    description = "Run Checkstyle on all sources"
+    group = LifecycleBasePlugin.VERIFICATION_GROUP
+    dependsOn(tasks.withType(Checkstyle::class.java))
+}
+
 spotless {
    encoding = StandardCharsets.UTF_8
    lineEndings = LineEnding.UNIX
@@ -191,6 +201,7 @@ spotless {

    val ktlintConfig = mapOf(
        "ktlint_standard_no-wildcard-imports" to "disabled",
+        "ktlint_standard_class-naming" to "disabled",
        "ij_kotlin_allow_trailing_comma" to "true",
        "ij_kotlin_allow_trailing_comma_on_call_site" to "true",
    )
--- a/buildSrc/src/main/kotlin/cc/tweaked/gradle/ExecTasks.kt
+++ b/buildSrc/src/main/kotlin/cc/tweaked/gradle/ExecTasks.kt
@@ -4,6 +4,7 @@

 package cc.tweaked.gradle

+import org.gradle.api.file.DirectoryProperty
 import org.gradle.api.provider.Property
 import org.gradle.api.tasks.AbstractExecTask
 import org.gradle.api.tasks.OutputDirectory
@@ -11,5 +12,5 @@ import java.io.File

 abstract class ExecToDir : AbstractExecTask<ExecToDir>(ExecToDir::class.java) {
    @get:OutputDirectory
-    abstract val output: Property<File>
+    abstract val output: DirectoryProperty
 }
--- a/buildSrc/src/main/kotlin/cc/tweaked/gradle/Extensions.kt
+++ b/buildSrc/src/main/kotlin/cc/tweaked/gradle/Extensions.kt
@@ -5,6 +5,8 @@
 package cc.tweaked.gradle

 import org.gradle.api.artifacts.dsl.DependencyHandler
+import org.gradle.api.file.FileSystemLocation
+import org.gradle.api.file.FileSystemLocationProperty
 import org.gradle.api.provider.Property
 import org.gradle.api.provider.Provider
 import org.gradle.api.tasks.JavaExec
@@ -124,3 +126,6 @@ class CloseScope : AutoCloseable {

 /** Proxy method to avoid overload ambiguity. */
 fun <T> Property<T>.setProvider(provider: Provider<out T>) = set(provider)
+
+/** Short-cut method to get the absolute path of a [FileSystemLocation] provider. */
+fun Provider<out FileSystemLocation>.getAbsolutePath(): String = get().asFile.absolutePath
--- a/config/checkstyle/suppressions.xml
+++ b/config/checkstyle/suppressions.xml
@@ -16,4 +16,10 @@ SPDX-License-Identifier: MPL-2.0

    <!-- The commands API is documented in Lua. -->
    <suppress checks="SummaryJavadocCheck" files=".*[\\/]CommandAPI.java" />
+
+    <!-- Allow putting files in other packages if they look like our TeaVM stubs. -->
+    <suppress checks="PackageName" files=".*[\\/]T[A-Za-z]+.java" />
+
+    <!-- Allow underscores in our test classes. -->
+    <suppress checks="MethodName" files=".*Contract.java" />
 </suppressions>
--- a/doc/events/file_transfer.md
+++ b/doc/events/file_transfer.md
@@ -29,7 +29,7 @@ for _, file in ipairs(files.getFiles()) do
  local size = file.seek("end")
  file.seek("set", 0)

-  print(file.getName() .. " " .. file.getSize())
+  print(file.getName() .. " " .. size)
 end
 ```

--- a/gradle.properties
+++ b/gradle.properties
@@ -10,7 +10,7 @@ kotlin.jvm.target.validation.mode=error

 # Mod properties
 isUnstable=false
-modVersion=1.108.0
+modVersion=1.108.3

 # Minecraft properties: We want to configure this here so we can read it in settings.gradle
 mcVersion=1.20.1
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -12,12 +12,12 @@ fabric-loader = "0.14.21"
 forge = "47.1.0"
 forgeSpi = "6.0.0"
 mixin = "0.8.5"
-parchment = "2023.06.26"
-parchmentMc = "1.19.4"
+parchment = "2023.08.20"
+parchmentMc = "1.20.1"

 # Normal dependencies
-asm = "9.3"
-autoService = "1.0.1"
+asm = "9.5"
+autoService = "1.1.1"
 checkerFramework = "3.32.0"
 cobalt = "0.7.3"
 cobalt-next = "0.7.4" # Not a real version, used to constrain the version we accept.
@@ -29,8 +29,8 @@ jzlib = "1.1.3"
 kotlin = "1.8.10"
 kotlin-coroutines = "1.6.4"
 netty = "4.1.82.Final"
-nightConfig = "3.6.5"
-slf4j = "1.7.36"
+nightConfig = "3.6.7"
+slf4j = "2.0.1"

 # Minecraft mods
 emi = "1.0.8+1.20.1"
@@ -45,34 +45,36 @@ rubidium = "0.6.1"
 sodium = "mc1.20-0.4.10"

 # Testing
-byteBuddy = "1.14.2"
+byteBuddy = "1.14.7"
 hamcrest = "2.2"
-jqwik = "1.7.2"
-junit = "5.9.2"
+jqwik = "1.7.4"
+junit = "5.10.0"

 # Build tools
 cctJavadoc = "1.8.0"
-checkstyle = "10.3.4"
+checkstyle = "10.12.3"
 curseForgeGradle = "1.0.14"
-errorProne-core = "2.18.0"
-errorProne-plugin = "3.0.1"
+errorProne-core = "2.21.1"
+errorProne-plugin = "3.1.0"
 fabric-loom = "1.3.7"
 forgeGradle = "6.0.8"
-githubRelease = "2.2.12"
-ideaExt = "1.1.6"
-illuaminate = "0.1.0-40-g975cbc3"
+githubRelease = "2.4.1"
+ideaExt = "1.1.7"
+illuaminate = "0.1.0-44-g9ee0055"
 librarian = "1.+"
 minotaur = "2.+"
 mixinGradle = "0.7.+"
 nullAway = "0.9.9"
-quiltflower = "1.10.0"
-spotless = "6.17.0"
+spotless = "6.21.0"
 taskTree = "2.1.1"
 vanillaGradle = "0.2.1-SNAPSHOT"
+vineflower = "1.11.0"
+teavm = "0.9.0-SQUID.1"

 [libraries]
 # Normal dependencies
 asm = { module = "org.ow2.asm:asm", version.ref = "asm" }
+asm-commons = { module = "org.ow2.asm:asm-commons", version.ref = "asm" }
 autoService = { module = "com.google.auto.service:auto-service", version.ref = "autoService" }
 checkerFramework = { module = "org.checkerframework:checker-qual", version.ref = "checkerFramework" }
 cobalt = { module = "org.squiddev:Cobalt", version.ref = "cobalt" }
@@ -137,9 +139,17 @@ kotlin-plugin = { module = "org.jetbrains.kotlin:kotlin-gradle-plugin", version.
 librarian = { module = "org.parchmentmc:librarian", version.ref = "librarian" }
 minotaur = { module = "com.modrinth.minotaur:Minotaur", version.ref = "minotaur" }
 nullAway = { module = "com.uber.nullaway:nullaway", version.ref = "nullAway" }
-quiltflower = { module = "io.github.juuxel:loom-quiltflower", version.ref = "quiltflower" }
 spotless = { module = "com.diffplug.spotless:spotless-plugin-gradle", version.ref = "spotless" }
+teavm-classlib = { module = "org.teavm:teavm-classlib", version.ref = "teavm" }
+teavm-jso = { module = "org.teavm:teavm-jso", version.ref = "teavm" }
+teavm-jso-apis = { module = "org.teavm:teavm-jso-apis", version.ref = "teavm" }
+teavm-jso-impl = { module = "org.teavm:teavm-jso-impl", version.ref = "teavm" }
+teavm-metaprogramming-api = { module = "org.teavm:teavm-metaprogramming-api", version.ref = "teavm" }
+teavm-metaprogramming-impl = { module = "org.teavm:teavm-metaprogramming-impl", version.ref = "teavm" }
+teavm-platform = { module = "org.teavm:teavm-platform", version.ref = "teavm" }
+teavm-tooling = { module = "org.teavm:teavm-tooling", version.ref = "teavm" }
 vanillaGradle = { module = "org.spongepowered:vanillagradle", version.ref = "vanillaGradle" }
+vineflower = { module = "io.github.juuxel:loom-vineflower", version.ref = "vineflower" }

 [plugins]
 forgeGradle = { id = "net.minecraftforge.gradle", version.ref = "forgeGradle" }
@@ -151,6 +161,7 @@ mixinGradle = { id = "org.spongepowered.mixin", version.ref = "mixinGradle" }
 taskTree = { id = "com.dorongold.task-tree", version.ref = "taskTree" }

 [bundles]
+annotations = ["jsr305", "checkerFramework", "jetbrainsAnnotations"]
 kotlin = ["kotlin-stdlib", "kotlin-coroutines"]

 # Minecraft
@@ -164,3 +175,7 @@ externalMods-fabric-runtime = ["jei-fabric", "modmenu"]
 # Testing
 test = ["junit-jupiter-api", "junit-jupiter-params", "hamcrest", "jqwik-api"]
 testRuntime = ["junit-jupiter-engine", "jqwik-engine"]
+
+# Build tools
+teavm-api = [ "teavm-jso", "teavm-jso-apis", "teavm-platform", "teavm-classlib", "teavm-metaprogramming-api" ]
+teavm-tooling = [ "teavm-tooling", "teavm-metaprogramming-impl", "teavm-jso-impl" ]
--- a/illuaminate.sexp
+++ b/illuaminate.sexp
@@ -10,7 +10,7 @@
  /projects/core/src/main/resources/data/computercraft/lua/bios.lua
  /projects/core/src/main/resources/data/computercraft/lua/rom/
  /projects/core/src/test/resources/test-rom
-  /projects/web/src/mount)
+  /projects/web/src/frontend/mount)

 (doc
  ; Also defined in projects/web/build.gradle.kts
@@ -23,7 +23,7 @@
    (url https://tweaked.cc/)
    (source-link https://github.com/cc-tweaked/CC-Tweaked/blob/${commit}/${path}#L${line})

-    (styles /projects/web/src/styles.css)
+    (styles  /projects/web/build/rollup/index.css)
    (scripts /projects/web/build/rollup/index.js)
    (head doc/head.html))

@@ -115,4 +115,4 @@
      :max sleep write
      cct_test describe expect howlci fail it pending stub before_each)))

-(at /projects/web/src/mount/expr_template.lua (lint (globals :max __expr__)))
+(at /projects/web/src/frontend/mount/expr_template.lua (lint (globals :max __expr__)))
--- a/package-lock.json
+++ b/package-lock.json
--- a/package.json
+++ b/package.json
@@ -6,24 +6,24 @@
  "license": "BSD-3-Clause",
  "type": "module",
  "dependencies": {
+    "@squid-dev/cc-web-term": "^2.0.0",
    "preact": "^10.5.5",
+    "setimmediate": "^1.0.5",
    "tslib": "^2.0.3"
  },
  "devDependencies": {
-    "@rollup/plugin-terser": "^0.4.0",
+    "@rollup/plugin-node-resolve": "^15.2.1",
    "@rollup/plugin-typescript": "^11.0.0",
    "@rollup/plugin-url": "^8.0.1",
-    "@types/glob": "^8.1.0",
-    "@types/react-dom": "^18.0.5",
-    "glob": "^9.3.0",
-    "react-dom": "^18.1.0",
-    "react": "^18.1.0",
-    "rehype-highlight": "^6.0.0",
-    "rehype-react": "^7.1.1",
-    "rehype": "^12.0.1",
-    "requirejs": "^2.3.6",
-    "rollup": "^3.19.1",
-    "ts-node": "^10.8.0",
-    "typescript": "^4.0.5"
+    "@swc/core": "^1.3.92",
+    "@types/node": "^20.8.3",
+    "lightningcss": "^1.22.0",
+    "preact-render-to-string": "^6.2.1",
+    "rehype": "^13.0.0",
+    "rehype-highlight": "^7.0.0",
+    "rehype-react": "^8.0.0",
+    "rollup": "^4.0.0",
+    "tsx": "^3.12.10",
+    "typescript": "^5.2.2"
  }
 }
--- a/projects/common-api/src/client/java/dan200/computercraft/api/client/turtle/TurtleUpgradeModellers.java
+++ b/projects/common-api/src/client/java/dan200/computercraft/api/client/turtle/TurtleUpgradeModellers.java
@@ -17,7 +17,7 @@ import org.joml.Matrix4f;

 import javax.annotation.Nullable;

-class TurtleUpgradeModellers {
+final class TurtleUpgradeModellers {
    private static final Transformation leftTransform = getMatrixFor(-0.4065f);
    private static final Transformation rightTransform = getMatrixFor(0.4065f);

@@ -35,7 +35,7 @@ class TurtleUpgradeModellers {

    static final TurtleUpgradeModeller<ITurtleUpgrade> UPGRADE_ITEM = new UpgradeItemModeller();

-    private static class UpgradeItemModeller implements TurtleUpgradeModeller<ITurtleUpgrade> {
+    private static final class UpgradeItemModeller implements TurtleUpgradeModeller<ITurtleUpgrade> {
        @Override
        public TransformedModel getModel(ITurtleUpgrade upgrade, @Nullable ITurtleAccess turtle, TurtleSide side) {
            return getModel(turtle == null ? upgrade.getCraftingItem() : upgrade.getUpgradeItem(turtle.getUpgradeNBTData(side)), side);
--- a/projects/common-api/src/main/java/dan200/computercraft/api/ComputerCraftTags.java
+++ b/projects/common-api/src/main/java/dan200/computercraft/api/ComputerCraftTags.java
@@ -46,6 +46,14 @@ public class ComputerCraftTags {
        public static final TagKey<Block> WIRED_MODEM = make("wired_modem");
        public static final TagKey<Block> MONITOR = make("monitor");

+        /**
+         * Blocks which should be ignored by a {@code peripheral_hub} peripheral.
+         * <p>
+         * This should include blocks which themselves expose a peripheral hub (such as {@linkplain #WIRED_MODEM wired
+         * modems}).
+         */
+        public static final TagKey<Block> PERIPHERAL_HUB_IGNORE = make("peripheral_hub_ignore");
+
        /**
         * Blocks which can be broken by any turtle tool.
         */
--- a/projects/common/build.gradle.kts
+++ b/projects/common/build.gradle.kts
@@ -39,4 +39,6 @@ dependencies {
    testModImplementation(testFixtures(project(":core")))
    testModImplementation(testFixtures(project(":common")))
    testModImplementation(libs.bundles.kotlin)
+
+    testFixturesImplementation(testFixtures(project(":core")))
 }
--- a/projects/common/src/client/java/dan200/computercraft/client/gui/NoTermComputerScreen.java
+++ b/projects/common/src/client/java/dan200/computercraft/client/gui/NoTermComputerScreen.java
@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2021 The CC: Tweaked Developers
 //
-// SPDX-License-Identifier: LicenseRef-CCPL
+// SPDX-License-Identifier: MPL-2.0

 package dan200.computercraft.client.gui;

--- a/projects/common/src/client/java/dan200/computercraft/client/integration/ShaderMod.java
+++ b/projects/common/src/client/java/dan200/computercraft/client/integration/ShaderMod.java
@@ -47,7 +47,7 @@ public class ShaderMod {
        Optional<ShaderMod> get();
    }

-    private static class Storage {
+    private static final class Storage {
        static final ShaderMod INSTANCE = ServiceLoader.load(Provider.class)
            .stream()
            .flatMap(x -> x.get().get().stream())
--- a/projects/common/src/main/java/dan200/computercraft/data/LanguageProvider.java
+++ b/projects/common/src/main/java/dan200/computercraft/data/LanguageProvider.java
@@ -139,8 +139,6 @@ public final class LanguageProvider implements DataProvider {
        add("commands.computercraft.tp.synopsis", "Teleport to a specific computer.");
        add("commands.computercraft.tp.desc", "Teleport to the location of a computer. You can either specify the computer's instance id (e.g. 123) or computer id (e.g #123).");
        add("commands.computercraft.tp.action", "Teleport to this computer");
-        add("commands.computercraft.tp.not_player", "Cannot open terminal for non-player");
-        add("commands.computercraft.tp.not_there", "Cannot locate computer in the world");
        add("commands.computercraft.view.synopsis", "View the terminal of a computer.");
        add("commands.computercraft.view.desc", "Open the terminal of a computer, allowing remote control of a computer. This does not provide access to turtle's inventories. You can either specify the computer's instance id (e.g. 123) or computer id (e.g #123).");
        add("commands.computercraft.view.action", "View this computer");
--- a/projects/common/src/main/java/dan200/computercraft/data/RecipeProvider.java
+++ b/projects/common/src/main/java/dan200/computercraft/data/RecipeProvider.java
@@ -5,6 +5,7 @@
 package dan200.computercraft.data;

 import com.google.gson.JsonObject;
+import com.mojang.authlib.GameProfile;
 import dan200.computercraft.api.ComputerCraftAPI;
 import dan200.computercraft.api.pocket.PocketUpgradeDataProvider;
 import dan200.computercraft.api.turtle.TurtleUpgradeDataProvider;
@@ -25,15 +26,12 @@ import net.minecraft.core.registries.Registries;
 import net.minecraft.data.PackOutput;
 import net.minecraft.data.recipes.*;
 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.DyeColor;
-import net.minecraft.world.item.DyeItem;
-import net.minecraft.world.item.Item;
-import net.minecraft.world.item.Items;
+import net.minecraft.world.item.*;
 import net.minecraft.world.item.crafting.Ingredient;
-import net.minecraft.world.item.crafting.RecipeSerializer;
 import net.minecraft.world.item.crafting.ShapedRecipe;
 import net.minecraft.world.item.crafting.SimpleCraftingRecipeSerializer;
 import net.minecraft.world.level.ItemLike;
@@ -41,6 +39,7 @@ import net.minecraft.world.level.block.Blocks;

 import java.util.List;
 import java.util.Locale;
+import java.util.UUID;
 import java.util.function.Consumer;

 import static dan200.computercraft.api.ComputerCraftTags.Items.COMPUTER;
@@ -443,7 +442,7 @@ class RecipeProvider extends net.minecraft.data.recipes.RecipeProvider {
            .requires(ModRegistry.Items.MONITOR_NORMAL.get())
            .unlockedBy("has_monitor", inventoryChange(ModRegistry.Items.MONITOR_NORMAL.get()))
            .save(
-                RecipeWrapper.wrap(RecipeSerializer.SHAPELESS_RECIPE, add)
+                RecipeWrapper.wrap(ModRegistry.RecipeSerializers.SHAPELESS.get(), add)
                    .withResultTag(playerHead("Cloudhunter", "6d074736-b1e9-4378-a99b-bd8777821c9c")),
                new ResourceLocation(ComputerCraftAPI.MOD_ID, "skull_cloudy")
            );
@@ -454,7 +453,7 @@ class RecipeProvider extends net.minecraft.data.recipes.RecipeProvider {
            .requires(ModRegistry.Items.COMPUTER_ADVANCED.get())
            .unlockedBy("has_computer", inventoryChange(ModRegistry.Items.COMPUTER_ADVANCED.get()))
            .save(
-                RecipeWrapper.wrap(RecipeSerializer.SHAPELESS_RECIPE, add)
+                RecipeWrapper.wrap(ModRegistry.RecipeSerializers.SHAPELESS.get(), add)
                    .withResultTag(playerHead("dan200", "f3c8d69b-0776-4512-8434-d1b2165909eb")),
                new ResourceLocation(ComputerCraftAPI.MOD_ID, "skull_dan200")
            );
@@ -513,17 +512,15 @@ class RecipeProvider extends net.minecraft.data.recipes.RecipeProvider {
    }

    private static CompoundTag playerHead(String name, String uuid) {
-        var owner = new CompoundTag();
-        owner.putString("Name", name);
-        owner.putString("Id", uuid);
+        var owner = NbtUtils.writeGameProfile(new CompoundTag(), new GameProfile(UUID.fromString(uuid), name));

        var tag = new CompoundTag();
-        tag.put("SkullOwner", owner);
+        tag.put(PlayerHeadItem.TAG_SKULL_OWNER, owner);
        return tag;
    }

    private static Consumer<JsonObject> family(ComputerFamily family) {
-        return json -> json.addProperty("family", family.toString());
+        return json -> json.addProperty("family", family.getSerializedName());
    }

    private static void addSpecial(Consumer<FinishedRecipe> add, SimpleCraftingRecipeSerializer<?> special) {
--- a/projects/common/src/main/java/dan200/computercraft/data/TagProvider.java
+++ b/projects/common/src/main/java/dan200/computercraft/data/TagProvider.java
@@ -35,6 +35,8 @@ class TagProvider {
        tags.tag(ComputerCraftTags.Blocks.WIRED_MODEM).add(ModRegistry.Blocks.CABLE.get(), ModRegistry.Blocks.WIRED_MODEM_FULL.get());
        tags.tag(ComputerCraftTags.Blocks.MONITOR).add(ModRegistry.Blocks.MONITOR_NORMAL.get(), ModRegistry.Blocks.MONITOR_ADVANCED.get());

+        tags.tag(ComputerCraftTags.Blocks.PERIPHERAL_HUB_IGNORE).addTag(ComputerCraftTags.Blocks.WIRED_MODEM);
+
        tags.tag(ComputerCraftTags.Blocks.TURTLE_ALWAYS_BREAKABLE).addTag(BlockTags.LEAVES).add(
            Blocks.BAMBOO, Blocks.BAMBOO_SAPLING // Bamboo isn't instabreak for some odd reason.
        );
--- a/projects/common/src/main/java/dan200/computercraft/impl/network/wired/WiredNetworkImpl.java
+++ b/projects/common/src/main/java/dan200/computercraft/impl/network/wired/WiredNetworkImpl.java
@@ -24,7 +24,7 @@ final class WiredNetworkImpl implements WiredNetwork {
        nodes.add(node);
    }

-    private WiredNetworkImpl(HashSet<WiredNodeImpl> nodes) {
+    private WiredNetworkImpl(Set<WiredNodeImpl> nodes) {
        this.nodes = nodes;
    }

@@ -375,7 +375,7 @@ final class WiredNetworkImpl implements WiredNetwork {
        }
    }

-    private static HashSet<WiredNodeImpl> reachableNodes(WiredNodeImpl start) {
+    private static Set<WiredNodeImpl> reachableNodes(WiredNodeImpl start) {
        Queue<WiredNodeImpl> enqueued = new ArrayDeque<>();
        var reachable = new HashSet<WiredNodeImpl>();

--- a/projects/common/src/main/java/dan200/computercraft/shared/ModRegistry.java
+++ b/projects/common/src/main/java/dan200/computercraft/shared/ModRegistry.java
@@ -24,12 +24,14 @@ import dan200.computercraft.shared.common.ClearColourRecipe;
 import dan200.computercraft.shared.common.ColourableRecipe;
 import dan200.computercraft.shared.common.DefaultBundledRedstoneProvider;
 import dan200.computercraft.shared.common.HeldItemMenu;
+import dan200.computercraft.shared.computer.blocks.CommandComputerBlock;
 import dan200.computercraft.shared.computer.blocks.CommandComputerBlockEntity;
 import dan200.computercraft.shared.computer.blocks.ComputerBlock;
 import dan200.computercraft.shared.computer.blocks.ComputerBlockEntity;
 import dan200.computercraft.shared.computer.core.ComputerFamily;
 import dan200.computercraft.shared.computer.inventory.ComputerMenuWithoutInventory;
 import dan200.computercraft.shared.computer.inventory.ViewComputerMenu;
+import dan200.computercraft.shared.computer.items.CommandComputerItem;
 import dan200.computercraft.shared.computer.items.ComputerItem;
 import dan200.computercraft.shared.computer.recipe.ComputerUpgradeRecipe;
 import dan200.computercraft.shared.data.BlockNamedEntityLootCondition;
@@ -68,6 +70,10 @@ import dan200.computercraft.shared.pocket.items.PocketComputerItem;
 import dan200.computercraft.shared.pocket.peripherals.PocketModem;
 import dan200.computercraft.shared.pocket.peripherals.PocketSpeaker;
 import dan200.computercraft.shared.pocket.recipes.PocketComputerUpgradeRecipe;
+import dan200.computercraft.shared.recipe.CustomShapedRecipe;
+import dan200.computercraft.shared.recipe.CustomShapelessRecipe;
+import dan200.computercraft.shared.recipe.ImpostorShapedRecipe;
+import dan200.computercraft.shared.recipe.ImpostorShapelessRecipe;
 import dan200.computercraft.shared.turtle.FurnaceRefuelHandler;
 import dan200.computercraft.shared.turtle.blocks.TurtleBlock;
 import dan200.computercraft.shared.turtle.blocks.TurtleBlockEntity;
@@ -77,8 +83,6 @@ 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.turtle.upgrades.*;
-import dan200.computercraft.shared.util.ImpostorRecipe;
-import dan200.computercraft.shared.util.ImpostorShapelessRecipe;
 import net.minecraft.commands.CommandSourceStack;
 import net.minecraft.commands.synchronization.ArgumentTypeInfo;
 import net.minecraft.commands.synchronization.SingletonArgumentInfo;
@@ -139,7 +143,7 @@ public final class ModRegistry {
        public static final RegistryEntry<ComputerBlock<ComputerBlockEntity>> COMPUTER_ADVANCED = REGISTRY.register("computer_advanced",
            () -> new ComputerBlock<>(computerProperties().mapColor(MapColor.GOLD), ComputerFamily.ADVANCED, BlockEntities.COMPUTER_ADVANCED));

-        public static final RegistryEntry<ComputerBlock<CommandComputerBlockEntity>> COMPUTER_COMMAND = REGISTRY.register("computer_command", () -> new ComputerBlock<>(
+        public static final RegistryEntry<ComputerBlock<CommandComputerBlockEntity>> COMPUTER_COMMAND = REGISTRY.register("computer_command", () -> new CommandComputerBlock<>(
            computerProperties().strength(-1, 6000000.0F),
            ComputerFamily.COMMAND, BlockEntities.COMPUTER_COMMAND
        ));
@@ -222,7 +226,7 @@ public final class ModRegistry {

        public static final RegistryEntry<ComputerItem> COMPUTER_NORMAL = ofBlock(Blocks.COMPUTER_NORMAL, ComputerItem::new);
        public static final RegistryEntry<ComputerItem> COMPUTER_ADVANCED = ofBlock(Blocks.COMPUTER_ADVANCED, ComputerItem::new);
-        public static final RegistryEntry<ComputerItem> COMPUTER_COMMAND = ofBlock(Blocks.COMPUTER_COMMAND, ComputerItem::new);
+        public static final RegistryEntry<ComputerItem> COMPUTER_COMMAND = ofBlock(Blocks.COMPUTER_COMMAND, CommandComputerItem::new);

        public static final RegistryEntry<PocketComputerItem> POCKET_COMPUTER_NORMAL = REGISTRY.register("pocket_computer_normal",
            () -> new PocketComputerItem(properties().stacksTo(1), ComputerFamily.NORMAL));
@@ -357,17 +361,21 @@ public final class ModRegistry {
            return REGISTRY.register(name, () -> new SimpleCraftingRecipeSerializer<>(factory));
        }

+        public static final RegistryEntry<RecipeSerializer<CustomShapedRecipe>> SHAPED = REGISTRY.register("shaped", () -> CustomShapedRecipe.serialiser(CustomShapedRecipe::new));
+        public static final RegistryEntry<RecipeSerializer<CustomShapelessRecipe>> SHAPELESS = REGISTRY.register("shapeless", () -> CustomShapelessRecipe.serialiser(CustomShapelessRecipe::new));
+
+        public static final RegistryEntry<RecipeSerializer<ImpostorShapedRecipe>> IMPOSTOR_SHAPED = REGISTRY.register("impostor_shaped", () -> CustomShapedRecipe.serialiser(ImpostorShapedRecipe::new));
+        public static final RegistryEntry<RecipeSerializer<ImpostorShapelessRecipe>> IMPOSTOR_SHAPELESS = REGISTRY.register("impostor_shapeless", () -> CustomShapelessRecipe.serialiser(ImpostorShapelessRecipe::new));
+
        public static final RegistryEntry<SimpleCraftingRecipeSerializer<ColourableRecipe>> DYEABLE_ITEM = simple("colour", ColourableRecipe::new);
        public static final RegistryEntry<SimpleCraftingRecipeSerializer<ClearColourRecipe>> DYEABLE_ITEM_CLEAR = simple("clear_colour", ClearColourRecipe::new);
-        public static final RegistryEntry<TurtleRecipe.Serializer> TURTLE = REGISTRY.register("turtle", TurtleRecipe.Serializer::new);
+        public static final RegistryEntry<RecipeSerializer<TurtleRecipe>> TURTLE = REGISTRY.register("turtle", () -> TurtleRecipe.validatingSerialiser(TurtleRecipe::of));
        public static final RegistryEntry<SimpleCraftingRecipeSerializer<TurtleUpgradeRecipe>> TURTLE_UPGRADE = simple("turtle_upgrade", TurtleUpgradeRecipe::new);
-        public static final RegistryEntry<TurtleOverlayRecipe.Serializer> TURTLE_OVERLAY = REGISTRY.register("turtle_overlay", TurtleOverlayRecipe.Serializer::new);
+        public static final RegistryEntry<RecipeSerializer<TurtleOverlayRecipe>> TURTLE_OVERLAY = REGISTRY.register("turtle_overlay", TurtleOverlayRecipe.Serializer::new);
        public static final RegistryEntry<SimpleCraftingRecipeSerializer<PocketComputerUpgradeRecipe>> POCKET_COMPUTER_UPGRADE = simple("pocket_computer_upgrade", PocketComputerUpgradeRecipe::new);
        public static final RegistryEntry<SimpleCraftingRecipeSerializer<PrintoutRecipe>> PRINTOUT = simple("printout", PrintoutRecipe::new);
        public static final RegistryEntry<SimpleCraftingRecipeSerializer<DiskRecipe>> DISK = simple("disk", DiskRecipe::new);
-        public static final RegistryEntry<ComputerUpgradeRecipe.Serializer> COMPUTER_UPGRADE = REGISTRY.register("computer_upgrade", ComputerUpgradeRecipe.Serializer::new);
-        public static final RegistryEntry<ImpostorRecipe.Serializer> IMPOSTOR_SHAPED = REGISTRY.register("impostor_shaped", ImpostorRecipe.Serializer::new);
-        public static final RegistryEntry<ImpostorShapelessRecipe.Serializer> IMPOSTOR_SHAPELESS = REGISTRY.register("impostor_shapeless", ImpostorShapelessRecipe.Serializer::new);
+        public static final RegistryEntry<RecipeSerializer<ComputerUpgradeRecipe>> COMPUTER_UPGRADE = REGISTRY.register("computer_upgrade", ComputerUpgradeRecipe.Serializer::new);
    }

    public static class Permissions {
--- a/projects/common/src/main/java/dan200/computercraft/shared/command/CommandComputerCraft.java
+++ b/projects/common/src/main/java/dan200/computercraft/shared/command/CommandComputerCraft.java
@@ -26,7 +26,6 @@ import dan200.computercraft.shared.network.container.ComputerContainerData;
 import net.minecraft.commands.CommandSourceStack;
 import net.minecraft.core.BlockPos;
 import net.minecraft.network.chat.Component;
-import net.minecraft.server.level.ServerPlayer;
 import net.minecraft.world.MenuProvider;
 import net.minecraft.world.entity.RelativeMovement;
 import net.minecraft.world.entity.player.Inventory;
@@ -34,13 +33,15 @@ import net.minecraft.world.entity.player.Player;
 import net.minecraft.world.inventory.AbstractContainerMenu;
 import net.minecraft.world.item.ItemStack;
 import net.minecraft.world.level.Level;
+import net.minecraft.world.phys.Vec3;

 import javax.annotation.Nullable;
 import java.io.File;
 import java.util.*;

 import static dan200.computercraft.shared.command.CommandUtils.isPlayer;
-import static dan200.computercraft.shared.command.Exceptions.*;
+import static dan200.computercraft.shared.command.Exceptions.NOT_TRACKING_EXCEPTION;
+import static dan200.computercraft.shared.command.Exceptions.NO_TIMINGS_EXCEPTION;
 import static dan200.computercraft.shared.command.arguments.ComputerArgumentType.getComputerArgument;
 import static dan200.computercraft.shared.command.arguments.ComputerArgumentType.oneComputer;
 import static dan200.computercraft.shared.command.arguments.ComputersArgumentType.*;
@@ -62,118 +63,25 @@ public final class CommandComputerCraft {
        dispatcher.register(choice("computercraft")
            .then(literal("dump")
                .requires(ModRegistry.Permissions.PERMISSION_DUMP)
-                .executes(context -> {
-                    var table = new TableBuilder("DumpAll", "Computer", "On", "Position");
-
-                    var source = context.getSource();
-                    List<ServerComputer> computers = new ArrayList<>(ServerContext.get(source.getServer()).registry().getComputers());
-
-                    Level world = source.getLevel();
-                    var pos = BlockPos.containing(source.getPosition());
-
-                    computers.sort((a, b) -> {
-                        if (a.getLevel() == b.getLevel() && a.getLevel() == world) {
-                            return Double.compare(a.getPosition().distSqr(pos), b.getPosition().distSqr(pos));
-                        } else if (a.getLevel() == world) {
-                            return -1;
-                        } else if (b.getLevel() == world) {
-                            return 1;
-                        } else {
-                            return Integer.compare(a.getInstanceID(), b.getInstanceID());
-                        }
-                    });
-
-                    for (var computer : computers) {
-                        table.row(
-                            linkComputer(source, computer, computer.getID()),
-                            bool(computer.isOn()),
-                            linkPosition(source, computer)
-                        );
-                    }
-
-                    table.display(context.getSource());
-                    return computers.size();
-                })
+                .executes(c -> dump(c.getSource()))
                .then(args()
                    .arg("computer", oneComputer())
-                    .executes(context -> {
-                        var computer = getComputerArgument(context, "computer");
-
-                        var table = new TableBuilder("Dump");
-                        table.row(header("Instance"), text(Integer.toString(computer.getInstanceID())));
-                        table.row(header("Id"), text(Integer.toString(computer.getID())));
-                        table.row(header("Label"), text(computer.getLabel()));
-                        table.row(header("On"), bool(computer.isOn()));
-                        table.row(header("Position"), linkPosition(context.getSource(), computer));
-                        table.row(header("Family"), text(computer.getFamily().toString()));
-
-                        for (var side : ComputerSide.values()) {
-                            var peripheral = computer.getPeripheral(side);
-                            if (peripheral != null) {
-                                table.row(header("Peripheral " + side.getName()), text(peripheral.getType()));
-                            }
-                        }
-
-                        table.display(context.getSource());
-                        return 1;
-                    })))
+                    .executes(c -> dumpComputer(c.getSource(), getComputerArgument(c, "computer")))))

            .then(command("shutdown")
                .requires(ModRegistry.Permissions.PERMISSION_SHUTDOWN)
                .argManyValue("computers", manyComputers(), s -> ServerContext.get(s.getServer()).registry().getComputers())
-                .executes((context, computerSelectors) -> {
-                    var shutdown = 0;
-                    var computers = unwrap(context.getSource(), computerSelectors);
-                    for (var computer : computers) {
-                        if (computer.isOn()) shutdown++;
-                        computer.shutdown();
-                    }
-
-                    var didShutdown = shutdown;
-                    context.getSource().sendSuccess(() -> Component.translatable("commands.computercraft.shutdown.done", didShutdown, computers.size()), false);
-                    return shutdown;
-                }))
+                .executes((c, a) -> shutdown(c.getSource(), unwrap(c.getSource(), a))))

            .then(command("turn-on")
                .requires(ModRegistry.Permissions.PERMISSION_TURN_ON)
                .argManyValue("computers", manyComputers(), s -> ServerContext.get(s.getServer()).registry().getComputers())
-                .executes((context, computerSelectors) -> {
-                    var on = 0;
-                    var computers = unwrap(context.getSource(), computerSelectors);
-                    for (var computer : computers) {
-                        if (!computer.isOn()) on++;
-                        computer.turnOn();
-                    }
-
-                    var didOn = on;
-                    context.getSource().sendSuccess(() -> Component.translatable("commands.computercraft.turn_on.done", didOn, computers.size()), false);
-                    return on;
-                }))
+                .executes((c, a) -> turnOn(c.getSource(), unwrap(c.getSource(), a))))

            .then(command("tp")
                .requires(ModRegistry.Permissions.PERMISSION_TP)
                .arg("computer", oneComputer())
-                .executes(context -> {
-                    var computer = getComputerArgument(context, "computer");
-                    var world = computer.getLevel();
-                    var pos = computer.getPosition();
-
-                    var entity = context.getSource().getEntityOrException();
-                    if (!(entity instanceof ServerPlayer player)) throw TP_NOT_PLAYER.create();
-
-                    if (player.getCommandSenderWorld() == world) {
-                        player.connection.teleport(
-                            pos.getX() + 0.5, pos.getY(), pos.getZ() + 0.5, 0, 0,
-                            EnumSet.noneOf(RelativeMovement.class)
-                        );
-                    } else {
-                        player.teleportTo(world,
-                            pos.getX() + 0.5, pos.getY(), pos.getZ() + 0.5, 0, 0
-                        );
-                    }
-
-                    return 1;
-                }))
+                .executes(c -> teleport(c.getSource(), getComputerArgument(c, "computer"))))

            .then(command("queue")
                .requires(ModRegistry.Permissions.PERMISSION_QUEUE)
@@ -182,79 +90,243 @@ public final class CommandComputerCraft {
                        .suggests((context, builder) -> Suggestions.empty())
                )
                .argManyValue("args", StringArgumentType.string(), Collections.emptyList())
-                .executes((ctx, args) -> {
-                    var computers = getComputersArgument(ctx, "computer");
-                    var rest = args.toArray();
-
-                    var queued = 0;
-                    for (var computer : computers) {
-                        if (computer.getFamily() == ComputerFamily.COMMAND && computer.isOn()) {
-                            computer.queueEvent("computer_command", rest);
-                            queued++;
-                        }
-                    }
-
-                    return queued;
-                }))
+                .executes((c, a) -> queue(getComputersArgument(c, "computer"), a)))

            .then(command("view")
                .requires(ModRegistry.Permissions.PERMISSION_VIEW)
                .arg("computer", oneComputer())
-                .executes(context -> {
-                    var player = context.getSource().getPlayerOrException();
-                    var computer = getComputerArgument(context, "computer");
-                    new ComputerContainerData(computer, ItemStack.EMPTY).open(player, new MenuProvider() {
-                        @Override
-                        public Component getDisplayName() {
-                            return Component.translatable("gui.computercraft.view_computer");
-                        }
-
-                        @Override
-                        public AbstractContainerMenu createMenu(int id, Inventory player, Player entity) {
-                            return new ViewComputerMenu(id, player, computer);
-                        }
-                    });
-                    return 1;
-                }))
+                .executes(c -> view(c.getSource(), getComputerArgument(c, "computer"))))

            .then(choice("track")
                .requires(ModRegistry.Permissions.PERMISSION_TRACK)
-                .then(command("start")
-                    .executes(context -> {
-                        getMetricsInstance(context.getSource()).start();
-
-                        var stopCommand = "/computercraft track stop";
-                        context.getSource().sendSuccess(() -> Component.translatable(
-                            "commands.computercraft.track.start.stop",
-                            link(text(stopCommand), stopCommand, Component.translatable("commands.computercraft.track.stop.action"))
-                        ), false);
-                        return 1;
-                    }))
-
-                .then(command("stop")
-                    .executes(context -> {
-                        var timings = getMetricsInstance(context.getSource());
-                        if (!timings.stop()) throw NOT_TRACKING_EXCEPTION.create();
-                        displayTimings(context.getSource(), timings.getSnapshot(), new AggregatedMetric(Metrics.COMPUTER_TASKS, Aggregate.AVG), DEFAULT_FIELDS);
-                        return 1;
-                    }))
-
+                .then(command("start").executes(c -> trackStart(c.getSource())))
+                .then(command("stop").executes(c -> trackStop(c.getSource())))
                .then(command("dump")
                    .argManyValue("fields", metric(), DEFAULT_FIELDS)
-                    .executes((context, fields) -> {
-                        AggregatedMetric sort;
-                        if (fields.size() == 1 && DEFAULT_FIELDS.contains(fields.get(0))) {
-                            sort = fields.get(0);
-                            fields = DEFAULT_FIELDS;
-                        } else {
-                            sort = fields.get(0);
-                        }
-
-                        return displayTimings(context.getSource(), sort, fields);
-                    })))
+                    .executes((c, f) -> trackDump(c.getSource(), f))))
        );
    }

+    /**
+     * Display loaded computers to a table.
+     *
+     * @param source The thing that executed this command.
+     * @return The number of loaded computers.
+     */
+    private static int dump(CommandSourceStack source) {
+        var table = new TableBuilder("DumpAll", "Computer", "On", "Position");
+
+        List<ServerComputer> computers = new ArrayList<>(ServerContext.get(source.getServer()).registry().getComputers());
+
+        Level world = source.getLevel();
+        var pos = BlockPos.containing(source.getPosition());
+
+        // Sort by nearby computers.
+        computers.sort((a, b) -> {
+            if (a.getLevel() == b.getLevel() && a.getLevel() == world) {
+                return Double.compare(a.getPosition().distSqr(pos), b.getPosition().distSqr(pos));
+            } else if (a.getLevel() == world) {
+                return -1;
+            } else if (b.getLevel() == world) {
+                return 1;
+            } else {
+                return Integer.compare(a.getInstanceID(), b.getInstanceID());
+            }
+        });
+
+        for (var computer : computers) {
+            table.row(
+                linkComputer(source, computer, computer.getID()),
+                bool(computer.isOn()),
+                linkPosition(source, computer)
+            );
+        }
+
+        table.display(source);
+        return computers.size();
+    }
+
+    /**
+     * Display additional information about a single computer.
+     *
+     * @param source   The thing that executed this command.
+     * @param computer The computer we're dumping.
+     * @return The constant {@code 1}.
+     */
+    private static int dumpComputer(CommandSourceStack source, ServerComputer computer) {
+        var table = new TableBuilder("Dump");
+        table.row(header("Instance"), text(Integer.toString(computer.getInstanceID())));
+        table.row(header("Id"), text(Integer.toString(computer.getID())));
+        table.row(header("Label"), text(computer.getLabel()));
+        table.row(header("On"), bool(computer.isOn()));
+        table.row(header("Position"), linkPosition(source, computer));
+        table.row(header("Family"), text(computer.getFamily().toString()));
+
+        for (var side : ComputerSide.values()) {
+            var peripheral = computer.getPeripheral(side);
+            if (peripheral != null) {
+                table.row(header("Peripheral " + side.getName()), text(peripheral.getType()));
+            }
+        }
+
+        table.display(source);
+        return 1;
+    }
+
+    /**
+     * Shutdown a list of computers.
+     *
+     * @param source    The thing that executed this command.
+     * @param computers The computers to shutdown.
+     * @return The constant {@code 1}.
+     */
+    private static int shutdown(CommandSourceStack source, Collection<ServerComputer> computers) {
+        var shutdown = 0;
+        for (var computer : computers) {
+            if (computer.isOn()) shutdown++;
+            computer.shutdown();
+        }
+
+        var didShutdown = shutdown;
+        source.sendSuccess(() -> Component.translatable("commands.computercraft.shutdown.done", didShutdown, computers.size()), false);
+        return shutdown;
+    }
+
+    /**
+     * Turn on a list of computers.
+     *
+     * @param source    The thing that executed this command.
+     * @param computers The computers to turn on.
+     * @return The constant {@code 1}.
+     */
+    private static int turnOn(CommandSourceStack source, Collection<ServerComputer> computers) {
+        var on = 0;
+        for (var computer : computers) {
+            if (!computer.isOn()) on++;
+            computer.turnOn();
+        }
+
+        var didOn = on;
+        source.sendSuccess(() -> Component.translatable("commands.computercraft.turn_on.done", didOn, computers.size()), false);
+        return on;
+    }
+
+    /**
+     * Teleport to a computer.
+     *
+     * @param source   The thing that executed this command. This must be an entity, other types will throw an exception.
+     * @param computer The computer to teleport to.
+     * @return The constant {@code 1}.
+     */
+    private static int teleport(CommandSourceStack source, ServerComputer computer) throws CommandSyntaxException {
+        var world = computer.getLevel();
+        var pos = Vec3.atBottomCenterOf(computer.getPosition());
+        source.getEntityOrException().teleportTo(world, pos.x(), pos.y(), pos.z(), EnumSet.noneOf(RelativeMovement.class), 0, 0);
+
+        return 1;
+    }
+
+    /**
+     * Queue a {@code computer_command} event on a command computer.
+     *
+     * @param computers The list of computers to queue on.
+     * @param args      The arguments for this event.
+     * @return The number of computers this event was queued on.
+     */
+    private static int queue(Collection<ServerComputer> computers, List<String> args) {
+        var rest = args.toArray();
+
+        var queued = 0;
+        for (var computer : computers) {
+            if (computer.getFamily() == ComputerFamily.COMMAND && computer.isOn()) {
+                computer.queueEvent("computer_command", rest);
+                queued++;
+            }
+        }
+
+        return queued;
+    }
+
+    /**
+     * Open a terminal for a computer.
+     *
+     * @param source   The thing that executed this command.
+     * @param computer The computer to view.
+     * @return The constant {@code 1}.
+     */
+    private static int view(CommandSourceStack source, ServerComputer computer) throws CommandSyntaxException {
+        var player = source.getPlayerOrException();
+        new ComputerContainerData(computer, ItemStack.EMPTY).open(player, new MenuProvider() {
+            @Override
+            public Component getDisplayName() {
+                return Component.translatable("gui.computercraft.view_computer");
+            }
+
+            @Override
+            public AbstractContainerMenu createMenu(int id, Inventory player, Player entity) {
+                return new ViewComputerMenu(id, player, computer);
+            }
+        });
+        return 1;
+    }
+
+    /**
+     * Start tracking metrics for the current player.
+     *
+     * @param source The thing that executed this command.
+     * @return The constant {@code 1}.
+     */
+    private static int trackStart(CommandSourceStack source) {
+        getMetricsInstance(source).start();
+
+        var stopCommand = "/computercraft track stop";
+        source.sendSuccess(() -> Component.translatable(
+            "commands.computercraft.track.start.stop",
+            link(text(stopCommand), stopCommand, Component.translatable("commands.computercraft.track.stop.action"))
+        ), false);
+        return 1;
+    }
+
+    /**
+     * Stop tracking metrics for the current player, displaying a table with the results.
+     *
+     * @param source The thing that executed this command.
+     * @return The constant {@code 1}.
+     */
+    private static int trackStop(CommandSourceStack source) throws CommandSyntaxException {
+        var metrics = getMetricsInstance(source);
+        if (!metrics.stop()) throw NOT_TRACKING_EXCEPTION.create();
+        displayTimings(source, metrics.getSnapshot(), new AggregatedMetric(Metrics.COMPUTER_TASKS, Aggregate.AVG), DEFAULT_FIELDS);
+        return 1;
+    }
+
+    private static final List<AggregatedMetric> DEFAULT_FIELDS = Arrays.asList(
+        new AggregatedMetric(Metrics.COMPUTER_TASKS, Aggregate.COUNT),
+        new AggregatedMetric(Metrics.COMPUTER_TASKS, Aggregate.NONE),
+        new AggregatedMetric(Metrics.COMPUTER_TASKS, Aggregate.AVG)
+    );
+
+    /**
+     * Display the latest metrics for the current player.
+     *
+     * @param source The thing that executed this command.
+     * @param fields The fields to display in this table, defaulting to {@link #DEFAULT_FIELDS}.
+     * @return The constant {@code 1}.
+     */
+    private static int trackDump(CommandSourceStack source, List<AggregatedMetric> fields) throws CommandSyntaxException {
+        AggregatedMetric sort;
+        if (fields.size() == 1 && DEFAULT_FIELDS.contains(fields.get(0))) {
+            sort = fields.get(0);
+            fields = DEFAULT_FIELDS;
+        } else {
+            sort = fields.get(0);
+        }
+
+        return displayTimings(source, getMetricsInstance(source).getTimings(), sort, fields);
+    }
+
+    // Additional helper functions.
+
    private static Component linkComputer(CommandSourceStack source, @Nullable ServerComputer serverComputer, int computerId) {
        var out = Component.literal("");

@@ -327,16 +399,6 @@ public final class CommandComputerCraft {
        return ServerContext.get(source.getServer()).metrics().getMetricsInstance(entity instanceof Player ? entity.getUUID() : SYSTEM_UUID);
    }

-    private static final List<AggregatedMetric> DEFAULT_FIELDS = Arrays.asList(
-        new AggregatedMetric(Metrics.COMPUTER_TASKS, Aggregate.COUNT),
-        new AggregatedMetric(Metrics.COMPUTER_TASKS, Aggregate.NONE),
-        new AggregatedMetric(Metrics.COMPUTER_TASKS, Aggregate.AVG)
-    );
-
-    private static int displayTimings(CommandSourceStack source, AggregatedMetric sortField, List<AggregatedMetric> fields) throws CommandSyntaxException {
-        return displayTimings(source, getMetricsInstance(source).getTimings(), sortField, fields);
-    }
-
    private static int displayTimings(CommandSourceStack source, List<ComputerMetrics> timings, AggregatedMetric sortField, List<AggregatedMetric> fields) throws CommandSyntaxException {
        if (timings.isEmpty()) throw NO_TIMINGS_EXCEPTION.create();

--- a/projects/common/src/main/java/dan200/computercraft/shared/command/Exceptions.java
+++ b/projects/common/src/main/java/dan200/computercraft/shared/command/Exceptions.java
@@ -18,9 +18,6 @@ public final class Exceptions {
    static final SimpleCommandExceptionType NOT_TRACKING_EXCEPTION = translated("commands.computercraft.track.stop.not_enabled");
    static final SimpleCommandExceptionType NO_TIMINGS_EXCEPTION = translated("commands.computercraft.track.dump.no_timings");

-    static final SimpleCommandExceptionType TP_NOT_THERE = translated("commands.computercraft.tp.not_there");
-    static final SimpleCommandExceptionType TP_NOT_PLAYER = translated("commands.computercraft.tp.not_player");
-
    public static final SimpleCommandExceptionType ARGUMENT_EXPECTED = translated("argument.computercraft.argument_expected");

    private static SimpleCommandExceptionType translated(String key) {
--- a/projects/common/src/main/java/dan200/computercraft/shared/computer/blocks/CommandComputerBlock.java
+++ b/projects/common/src/main/java/dan200/computercraft/shared/computer/blocks/CommandComputerBlock.java
@@ -0,0 +1,23 @@
+// SPDX-FileCopyrightText: 2023 The CC: Tweaked Developers
+//
+// SPDX-License-Identifier: MPL-2.0
+
+package dan200.computercraft.shared.computer.blocks;
+
+import dan200.computercraft.shared.computer.core.ComputerFamily;
+import dan200.computercraft.shared.platform.RegistryEntry;
+import net.minecraft.world.level.block.GameMasterBlock;
+import net.minecraft.world.level.block.entity.BlockEntityType;
+
+/**
+ * A subclass of {@link ComputerBlock} which implements {@link GameMasterBlock}, to prevent players breaking it without
+ * permission.
+ *
+ * @param <T> The type of the computer block entity.
+ * @see dan200.computercraft.shared.computer.items.CommandComputerItem
+ */
+public class CommandComputerBlock<T extends CommandComputerBlockEntity> extends ComputerBlock<T> implements GameMasterBlock {
+    public CommandComputerBlock(Properties settings, ComputerFamily family, RegistryEntry<BlockEntityType<T>> type) {
+        super(settings, family, type);
+    }
+}
--- a/projects/common/src/main/java/dan200/computercraft/shared/computer/blocks/CommandComputerBlockEntity.java
+++ b/projects/common/src/main/java/dan200/computercraft/shared/computer/blocks/CommandComputerBlockEntity.java
@@ -104,11 +104,15 @@ public class CommandComputerBlockEntity extends ComputerBlockEntity {
        if (server == null || !server.isCommandBlockEnabled()) {
            player.displayClientMessage(Component.translatable("advMode.notEnabled"), true);
            return false;
-        } else if (Config.commandRequireCreative ? !player.canUseGameMasterBlocks() : !server.getPlayerList().isOp(player.getGameProfile())) {
+        } else if (!canUseCommandBlock(player)) {
            player.displayClientMessage(Component.translatable("advMode.notAllowed"), true);
            return false;
        }

        return true;
    }
+
+    private static boolean canUseCommandBlock(Player player) {
+        return Config.commandRequireCreative ? player.canUseGameMasterBlocks() : player.hasPermissions(2);
+    }
 }
--- a/projects/common/src/main/java/dan200/computercraft/shared/computer/core/ComputerFamily.java
+++ b/projects/common/src/main/java/dan200/computercraft/shared/computer/core/ComputerFamily.java
@@ -4,8 +4,33 @@

 package dan200.computercraft.shared.computer.core;

-public enum ComputerFamily {
-    NORMAL,
-    ADVANCED,
-    COMMAND
+import com.google.gson.JsonObject;
+import com.google.gson.JsonSyntaxException;
+import net.minecraft.util.GsonHelper;
+import net.minecraft.util.StringRepresentable;
+
+public enum ComputerFamily implements StringRepresentable {
+    NORMAL("normal"),
+    ADVANCED("advanced"),
+    COMMAND("command");
+
+    private final String name;
+
+    ComputerFamily(String name) {
+        this.name = name;
+    }
+
+    public static ComputerFamily getFamily(JsonObject json, String name) {
+        var familyName = GsonHelper.getAsString(json, name);
+        for (var family : values()) {
+            if (family.getSerializedName().equalsIgnoreCase(familyName)) return family;
+        }
+
+        throw new JsonSyntaxException("Unknown computer family '" + familyName + "' for field " + name);
+    }
+
+    @Override
+    public String getSerializedName() {
+        return name;
+    }
 }
--- a/projects/common/src/main/java/dan200/computercraft/shared/computer/core/ResourceMount.java
+++ b/projects/common/src/main/java/dan200/computercraft/shared/computer/core/ResourceMount.java
@@ -29,8 +29,6 @@ import java.util.Map;
 public final class ResourceMount extends ArchiveMount<ResourceMount.FileEntry> {
    private static final Logger LOG = LoggerFactory.getLogger(ResourceMount.class);

-    private static final byte[] TEMP_BUFFER = new byte[8192];
-
    /**
     * Maintain a cache of currently loaded resource mounts. This cache is invalidated when currentManager changes.
     */
@@ -60,7 +58,7 @@ public final class ResourceMount extends ArchiveMount<ResourceMount.FileEntry> {
        var hasAny = false;
        String existingNamespace = null;

-        var newRoot = new FileEntry("", new ResourceLocation(namespace, subPath));
+        var newRoot = new FileEntry(new ResourceLocation(namespace, subPath));
        for (var file : manager.listResources(subPath, s -> true).keySet()) {
            existingNamespace = file.getNamespace();

@@ -68,7 +66,11 @@ public final class ResourceMount extends ArchiveMount<ResourceMount.FileEntry> {
            if (!FileSystem.contains(subPath, file.getPath())) continue; // Some packs seem to include the parent?

            var localPath = FileSystem.toLocal(file.getPath(), subPath);
-            create(newRoot, localPath);
+            try {
+                getOrCreateChild(newRoot, localPath, this::createEntry);
+            } catch (ResourceLocationException e) {
+                LOG.warn("Cannot create resource location for {} ({})", localPath, e.getMessage());
+            }
            hasAny = true;
        }

@@ -83,65 +85,24 @@ public final class ResourceMount extends ArchiveMount<ResourceMount.FileEntry> {
        }
    }

-    private void create(FileEntry lastEntry, String path) {
-        var lastIndex = 0;
-        while (lastIndex < path.length()) {
-            var nextIndex = path.indexOf('/', lastIndex);
-            if (nextIndex < 0) nextIndex = path.length();
-
-            var part = path.substring(lastIndex, nextIndex);
-            if (lastEntry.children == null) lastEntry.children = new HashMap<>();
-
-            var nextEntry = lastEntry.children.get(part);
-            if (nextEntry == null) {
-                ResourceLocation childPath;
-                try {
-                    childPath = new ResourceLocation(namespace, subPath + "/" + path);
-                } catch (ResourceLocationException e) {
-                    LOG.warn("Cannot create resource location for {} ({})", part, e.getMessage());
-                    return;
-                }
-                lastEntry.children.put(part, nextEntry = new FileEntry(path, childPath));
-            }
-
-            lastEntry = nextEntry;
-            lastIndex = nextIndex + 1;
-        }
+    private FileEntry createEntry(String path) {
+        return new FileEntry(new ResourceLocation(namespace, subPath + "/" + path));
    }

    @Override
-    public long getSize(FileEntry file) {
+    protected byte[] getFileContents(String path, FileEntry file) throws IOException {
        var resource = manager.getResource(file.identifier).orElse(null);
-        if (resource == null) return 0;
-
-        try (var stream = resource.open()) {
-            int total = 0, read = 0;
-            do {
-                total += read;
-                read = stream.read(TEMP_BUFFER);
-            } while (read > 0);
-
-            return total;
-        } catch (IOException e) {
-            return 0;
-        }
-    }
-
-    @Override
-    public byte[] getContents(FileEntry file) throws IOException {
-        var resource = manager.getResource(file.identifier).orElse(null);
-        if (resource == null) throw new FileOperationException(file.path, NO_SUCH_FILE);
+        if (resource == null) throw new FileOperationException(path, NO_SUCH_FILE);

        try (var stream = resource.open()) {
            return stream.readAllBytes();
        }
    }

-    protected static class FileEntry extends ArchiveMount.FileEntry<FileEntry> {
+    protected static final class FileEntry extends ArchiveMount.FileEntry<FileEntry> {
        final ResourceLocation identifier;

-        FileEntry(String path, ResourceLocation identifier) {
-            super(path);
+        FileEntry(ResourceLocation identifier) {
            this.identifier = identifier;
        }
    }
--- a/projects/common/src/main/java/dan200/computercraft/shared/computer/items/AbstractComputerItem.java
+++ b/projects/common/src/main/java/dan200/computercraft/shared/computer/items/AbstractComputerItem.java
@@ -64,13 +64,7 @@ public abstract class AbstractComputerItem extends BlockItem implements ICompute

    @Override
    public @Nullable Mount createDataMount(ItemStack stack, ServerLevel level) {
-        var family = getFamily();
-        if (family != ComputerFamily.COMMAND) {
-            var id = getComputerID(stack);
-            if (id >= 0) {
-                return ComputerCraftAPI.createSaveDirMount(level.getServer(), "computer/" + id, Config.computerSpaceLimit);
-            }
-        }
-        return null;
+        var id = getComputerID(stack);
+        return id >= 0 ? ComputerCraftAPI.createSaveDirMount(level.getServer(), "computer/" + id, Config.computerSpaceLimit) : null;
    }
 }
--- a/projects/common/src/main/java/dan200/computercraft/shared/computer/items/CommandComputerItem.java
+++ b/projects/common/src/main/java/dan200/computercraft/shared/computer/items/CommandComputerItem.java
@@ -0,0 +1,38 @@
+// SPDX-FileCopyrightText: 2023 The CC: Tweaked Developers
+//
+// SPDX-License-Identifier: MPL-2.0
+
+package dan200.computercraft.shared.computer.items;
+
+import dan200.computercraft.api.filesystem.Mount;
+import dan200.computercraft.shared.computer.blocks.ComputerBlock;
+import net.minecraft.server.level.ServerLevel;
+import net.minecraft.world.item.ItemStack;
+import net.minecraft.world.item.context.BlockPlaceContext;
+import net.minecraft.world.level.block.state.BlockState;
+import org.jetbrains.annotations.Nullable;
+
+/**
+ * A {@link ComputerItem} which prevents players placing it without permission.
+ *
+ * @see net.minecraft.world.item.GameMasterBlockItem
+ * @see dan200.computercraft.shared.computer.blocks.CommandComputerBlock
+ */
+public class CommandComputerItem extends ComputerItem {
+    public CommandComputerItem(ComputerBlock<?> block, Properties settings) {
+        super(block, settings);
+    }
+
+    @Override
+    protected @Nullable BlockState getPlacementState(BlockPlaceContext context) {
+        // Prohibit players placing this block in survival or when not opped.
+        var player = context.getPlayer();
+        return player != null && !player.canUseGameMasterBlocks() ? null : super.getPlacementState(context);
+    }
+
+    @Override
+    public @Nullable Mount createDataMount(ItemStack stack, ServerLevel level) {
+        // Don't allow command computers to be mounted in disk drives.
+        return null;
+    }
+}
--- a/projects/common/src/main/java/dan200/computercraft/shared/computer/menu/ServerInputState.java
+++ b/projects/common/src/main/java/dan200/computercraft/shared/computer/menu/ServerInputState.java
@@ -4,7 +4,12 @@

 package dan200.computercraft.shared.computer.menu;

-import dan200.computercraft.shared.computer.upload.*;
+import dan200.computercraft.core.apis.handles.ByteBufferChannel;
+import dan200.computercraft.core.apis.transfer.TransferredFile;
+import dan200.computercraft.core.apis.transfer.TransferredFiles;
+import dan200.computercraft.shared.computer.upload.FileSlice;
+import dan200.computercraft.shared.computer.upload.FileUpload;
+import dan200.computercraft.shared.computer.upload.UploadResult;
 import dan200.computercraft.shared.network.client.UploadResultMessage;
 import dan200.computercraft.shared.platform.PlatformHelper;
 import it.unimi.dsi.fastutil.ints.IntOpenHashSet;
@@ -18,7 +23,6 @@ import org.slf4j.LoggerFactory;
 import javax.annotation.Nullable;
 import java.util.List;
 import java.util.UUID;
-import java.util.stream.Collectors;

 /**
 * The default concrete implementation of {@link ServerInputHandler}.
@@ -150,8 +154,14 @@ public class ServerInputState<T extends AbstractContainerMenu & ComputerMenu> im
            }
        }

-        computer.queueEvent("file_transfer", new Object[]{
-            new TransferredFiles(player, owner, toUpload.stream().map(x -> new TransferredFile(x.getName(), x.getBytes())).collect(Collectors.toList())),
+        computer.queueEvent(TransferredFiles.EVENT, new Object[]{
+            new TransferredFiles(
+                toUpload.stream().map(x -> new TransferredFile(x.getName(), new ByteBufferChannel(x.getBytes()))).toList(),
+                () -> {
+                    if (player.isAlive() && player.containerMenu == owner) {
+                        PlatformHelper.get().sendToPlayer(UploadResultMessage.consumed(owner), player);
+                    }
+                }),
        });
        return UploadResultMessage.queued(owner);
    }
--- a/projects/common/src/main/java/dan200/computercraft/shared/computer/metrics/ComputerMBean.java
+++ b/projects/common/src/main/java/dan200/computercraft/shared/computer/metrics/ComputerMBean.java
@@ -141,7 +141,7 @@ public final class ComputerMBean implements DynamicMBean, ComputerMetricsObserve
        }
    }

-    private static class Counter {
+    private static final class Counter {
        final AtomicLong value = new AtomicLong();
        final AtomicLong count = new AtomicLong();
    }
--- a/projects/common/src/main/java/dan200/computercraft/shared/computer/recipe/ComputerConvertRecipe.java
+++ b/projects/common/src/main/java/dan200/computercraft/shared/computer/recipe/ComputerConvertRecipe.java
@@ -5,31 +5,20 @@
 package dan200.computercraft.shared.computer.recipe;

 import dan200.computercraft.shared.computer.items.IComputerItem;
-import net.minecraft.core.NonNullList;
+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.item.crafting.CraftingBookCategory;
-import net.minecraft.world.item.crafting.Ingredient;
-import net.minecraft.world.item.crafting.ShapedRecipe;
 import net.minecraft.world.level.Level;

 /**
- * Represents a recipe which converts a computer from one form into another.
+ * A recipe which converts a computer from one form into another.
 */
-public abstract class ComputerConvertRecipe extends ShapedRecipe {
-    private final String group;
-    private final ItemStack result;
-
-    public ComputerConvertRecipe(ResourceLocation identifier, String group, CraftingBookCategory category, int width, int height, NonNullList<Ingredient> ingredients, ItemStack result) {
-        super(identifier, group, category, width, height, ingredients, result);
-        this.group = group;
-        this.result = result;
-    }
-
-    public ItemStack getResultItem() {
-        return result;
+public abstract class ComputerConvertRecipe extends CustomShapedRecipe {
+    public ComputerConvertRecipe(ResourceLocation identifier, ShapedRecipeSpec recipe) {
+        super(identifier, recipe);
    }

    protected abstract ItemStack convert(IComputerItem item, ItemStack stack);
@@ -55,9 +44,4 @@ public abstract class ComputerConvertRecipe extends ShapedRecipe {

        return ItemStack.EMPTY;
    }
-
-    @Override
-    public String getGroup() {
-        return group;
-    }
 }
--- a/projects/common/src/main/java/dan200/computercraft/shared/computer/recipe/ComputerFamilyRecipe.java
+++ b/projects/common/src/main/java/dan200/computercraft/shared/computer/recipe/ComputerFamilyRecipe.java
@@ -1,72 +0,0 @@
-// SPDX-FileCopyrightText: 2018 The CC: Tweaked Developers
-//
-// SPDX-License-Identifier: MPL-2.0
-
-package dan200.computercraft.shared.computer.recipe;
-
-import com.google.gson.JsonObject;
-import dan200.computercraft.shared.computer.core.ComputerFamily;
-import dan200.computercraft.shared.util.RecipeUtil;
-import net.minecraft.core.NonNullList;
-import net.minecraft.network.FriendlyByteBuf;
-import net.minecraft.resources.ResourceLocation;
-import net.minecraft.util.GsonHelper;
-import net.minecraft.world.item.ItemStack;
-import net.minecraft.world.item.crafting.CraftingBookCategory;
-import net.minecraft.world.item.crafting.Ingredient;
-import net.minecraft.world.item.crafting.RecipeSerializer;
-
-public abstract class ComputerFamilyRecipe extends ComputerConvertRecipe {
-    private final ComputerFamily family;
-
-    public ComputerFamilyRecipe(ResourceLocation identifier, String group, CraftingBookCategory category, int width, int height, NonNullList<Ingredient> ingredients, ItemStack result, ComputerFamily family) {
-        super(identifier, group, category, width, height, ingredients, result);
-        this.family = family;
-    }
-
-    public ComputerFamily getFamily() {
-        return family;
-    }
-
-    public abstract static class Serializer<T extends ComputerFamilyRecipe> implements RecipeSerializer<T> {
-        protected abstract T create(ResourceLocation identifier, String group, CraftingBookCategory category, int width, int height, NonNullList<Ingredient> ingredients, ItemStack result, ComputerFamily family);
-
-        @Override
-        public T fromJson(ResourceLocation identifier, JsonObject json) {
-            var group = GsonHelper.getAsString(json, "group", "");
-            var category = CraftingBookCategory.CODEC.byName(GsonHelper.getAsString(json, "category", null), CraftingBookCategory.MISC);
-            var family = RecipeUtil.getFamily(json, "family");
-
-            var template = RecipeUtil.getTemplate(json);
-            var result = itemStackFromJson(GsonHelper.getAsJsonObject(json, "result"));
-
-            return create(identifier, group, category, template.width(), template.height(), template.ingredients(), result, family);
-        }
-
-        @Override
-        public T fromNetwork(ResourceLocation identifier, FriendlyByteBuf buf) {
-            var width = buf.readVarInt();
-            var height = buf.readVarInt();
-            var group = buf.readUtf();
-            var category = buf.readEnum(CraftingBookCategory.class);
-
-            var ingredients = NonNullList.withSize(width * height, Ingredient.EMPTY);
-            for (var i = 0; i < ingredients.size(); i++) ingredients.set(i, Ingredient.fromNetwork(buf));
-
-            var result = buf.readItem();
-            var family = buf.readEnum(ComputerFamily.class);
-            return create(identifier, group, category, width, height, ingredients, result, family);
-        }
-
-        @Override
-        public void toNetwork(FriendlyByteBuf buf, T recipe) {
-            buf.writeVarInt(recipe.getWidth());
-            buf.writeVarInt(recipe.getHeight());
-            buf.writeUtf(recipe.getGroup());
-            buf.writeEnum(recipe.category());
-            for (var ingredient : recipe.getIngredients()) ingredient.toNetwork(buf);
-            buf.writeItem(recipe.getResultItem());
-            buf.writeEnum(recipe.getFamily());
-        }
-    }
-}
--- a/projects/common/src/main/java/dan200/computercraft/shared/computer/recipe/ComputerUpgradeRecipe.java
+++ b/projects/common/src/main/java/dan200/computercraft/shared/computer/recipe/ComputerUpgradeRecipe.java
@@ -4,35 +4,57 @@

 package dan200.computercraft.shared.computer.recipe;

+import com.google.gson.JsonObject;
 import dan200.computercraft.shared.ModRegistry;
 import dan200.computercraft.shared.computer.core.ComputerFamily;
 import dan200.computercraft.shared.computer.items.IComputerItem;
-import net.minecraft.core.NonNullList;
+import dan200.computercraft.shared.recipe.ShapedRecipeSpec;
+import net.minecraft.network.FriendlyByteBuf;
 import net.minecraft.resources.ResourceLocation;
 import net.minecraft.world.item.ItemStack;
-import net.minecraft.world.item.crafting.CraftingBookCategory;
-import net.minecraft.world.item.crafting.Ingredient;
 import net.minecraft.world.item.crafting.RecipeSerializer;

-public final class ComputerUpgradeRecipe extends ComputerFamilyRecipe {
-    private ComputerUpgradeRecipe(ResourceLocation identifier, String group, CraftingBookCategory category, int width, int height, NonNullList<Ingredient> ingredients, ItemStack result, ComputerFamily family) {
-        super(identifier, group, category, width, height, ingredients, result, family);
+/**
+ * A recipe which "upgrades" a {@linkplain IComputerItem computer}, converting it from one {@linkplain ComputerFamily
+ * family} to another.
+ */
+public final class ComputerUpgradeRecipe extends ComputerConvertRecipe {
+    private final ComputerFamily family;
+
+    private ComputerUpgradeRecipe(ResourceLocation identifier, ShapedRecipeSpec recipe, ComputerFamily family) {
+        super(identifier, recipe);
+        this.family = family;
    }

    @Override
    protected ItemStack convert(IComputerItem item, ItemStack stack) {
-        return item.withFamily(stack, getFamily());
+        return item.withFamily(stack, family);
    }

    @Override
-    public RecipeSerializer<?> getSerializer() {
+    public RecipeSerializer<ComputerUpgradeRecipe> getSerializer() {
        return ModRegistry.RecipeSerializers.COMPUTER_UPGRADE.get();
    }

-    public static class Serializer extends ComputerFamilyRecipe.Serializer<ComputerUpgradeRecipe> {
+    public static class Serializer implements RecipeSerializer<ComputerUpgradeRecipe> {
        @Override
-        protected ComputerUpgradeRecipe create(ResourceLocation identifier, String group, CraftingBookCategory category, int width, int height, NonNullList<Ingredient> ingredients, ItemStack result, ComputerFamily family) {
-            return new ComputerUpgradeRecipe(identifier, group, category, width, height, ingredients, result, family);
+        public ComputerUpgradeRecipe fromJson(ResourceLocation identifier, JsonObject json) {
+            var recipe = ShapedRecipeSpec.fromJson(json);
+            var family = ComputerFamily.getFamily(json, "family");
+            return new ComputerUpgradeRecipe(identifier, recipe, family);
+        }
+
+        @Override
+        public ComputerUpgradeRecipe fromNetwork(ResourceLocation identifier, FriendlyByteBuf buf) {
+            var recipe = ShapedRecipeSpec.fromNetwork(buf);
+            var family = buf.readEnum(ComputerFamily.class);
+            return new ComputerUpgradeRecipe(identifier, recipe, family);
+        }
+
+        @Override
+        public void toNetwork(FriendlyByteBuf buf, ComputerUpgradeRecipe recipe) {
+            recipe.toSpec().toNetwork(buf);
+            buf.writeEnum(recipe.family);
        }
    }
 }
--- a/projects/common/src/main/java/dan200/computercraft/shared/details/ItemDetails.java
+++ b/projects/common/src/main/java/dan200/computercraft/shared/details/ItemDetails.java
@@ -61,7 +61,7 @@ public class ItemDetails {

        /*
         * Used to hide some data from ItemStack tooltip.
-         * @see https://minecraft.gamepedia.com/Tutorials/Command_NBT_tags
+         * @see https://minecraft.wiki/w/Tutorials/Command_NBT_tags
         * @see ItemStack#getTooltip
         */
        var hideFlags = tag != null ? tag.getInt("HideFlags") : 0;
@@ -116,6 +116,7 @@ public class ItemDetails {
     * @param enchants    The enchantment map to add it to.
     * @see EnchantmentHelper
     */
+    @SuppressWarnings("NonApiType")
    private static void addEnchantments(ListTag rawEnchants, ArrayList<Map<String, Object>> enchants) {
        if (rawEnchants.isEmpty()) return;

--- a/projects/common/src/main/java/dan200/computercraft/shared/integration/PermissionRegistry.java
+++ b/projects/common/src/main/java/dan200/computercraft/shared/integration/PermissionRegistry.java
@@ -69,7 +69,7 @@ public abstract class PermissionRegistry {
            .orElseGet(DefaultPermissionRegistry::new);
    }

-    private static class DefaultPermissionRegistry extends PermissionRegistry {
+    private static final class DefaultPermissionRegistry extends PermissionRegistry {
        @Override
        public Predicate<CommandSourceStack> registerCommand(String command, UserLevel fallback) {
            checkNotFrozen();
--- a/projects/common/src/main/java/dan200/computercraft/shared/peripheral/diskdrive/DiskDriveBlockEntity.java
+++ b/projects/common/src/main/java/dan200/computercraft/shared/peripheral/diskdrive/DiskDriveBlockEntity.java
@@ -35,7 +35,7 @@ import java.util.concurrent.atomic.AtomicReference;
 public final class DiskDriveBlockEntity extends AbstractContainerBlockEntity {
    private static final String NBT_ITEM = "Item";

-    private static class MountInfo {
+    private static final class MountInfo {
        @Nullable
        String mountPath;
    }
--- a/projects/common/src/main/java/dan200/computercraft/shared/peripheral/modem/wired/CableBlockEntity.java
+++ b/projects/common/src/main/java/dan200/computercraft/shared/peripheral/modem/wired/CableBlockEntity.java
@@ -36,7 +36,7 @@ import java.util.Collections;
 public class CableBlockEntity extends BlockEntity {
    private static final String NBT_PERIPHERAL_ENABLED = "PeripheralAccess";

-    private class CableElement extends WiredModemElement {
+    private final class CableElement extends WiredModemElement {
        @Override
        public Level getLevel() {
            return CableBlockEntity.this.getLevel();
--- a/projects/common/src/main/java/dan200/computercraft/shared/peripheral/modem/wired/WiredModemLocalPeripheral.java
+++ b/projects/common/src/main/java/dan200/computercraft/shared/peripheral/modem/wired/WiredModemLocalPeripheral.java
@@ -4,8 +4,8 @@

 package dan200.computercraft.shared.peripheral.modem.wired;

+import dan200.computercraft.api.ComputerCraftTags;
 import dan200.computercraft.api.peripheral.IPeripheral;
-import dan200.computercraft.shared.ModRegistry;
 import dan200.computercraft.shared.computer.core.ServerContext;
 import dan200.computercraft.shared.platform.ComponentAccess;
 import dan200.computercraft.shared.platform.PlatformHelper;
@@ -124,8 +124,7 @@ public final class WiredModemLocalPeripheral {
    private IPeripheral getPeripheralFrom(Level world, BlockPos pos, Direction direction) {
        var offset = pos.relative(direction);

-        var block = world.getBlockState(offset).getBlock();
-        if (block == ModRegistry.Blocks.WIRED_MODEM_FULL.get() || block == ModRegistry.Blocks.CABLE.get()) return null;
+        if (world.getBlockState(offset).is(ComputerCraftTags.Blocks.PERIPHERAL_HUB_IGNORE)) return null;

        var peripheral = peripherals.get((ServerLevel) world, pos, direction);
        return peripheral instanceof WiredModemPeripheral ? null : peripheral;
--- a/projects/common/src/main/java/dan200/computercraft/shared/peripheral/monitor/MonitorBlockEntity.java
+++ b/projects/common/src/main/java/dan200/computercraft/shared/peripheral/monitor/MonitorBlockEntity.java
@@ -349,13 +349,15 @@ public class MonitorBlockEntity extends BlockEntity {
        // Either delete the current monitor or sync a new one.
        if (needsTerminal) {
            if (serverMonitor == null) serverMonitor = new ServerMonitor(advanced, this);
-        } else {
-            serverMonitor = null;
-        }

-        // Update the terminal's width and height and rebuild it. This ensures the monitor
-        // is consistent when syncing it to other monitors.
-        if (serverMonitor != null) serverMonitor.rebuild();
+            // Update the terminal's width and height and rebuild it. This ensures the monitor
+            // is consistent when syncing it to other monitors.
+            serverMonitor.rebuild();
+        } else {
+            // Remove the terminal from the serverMonitor, but keep it around - this ensures that we sync
+            // the (now blank) monitor to the client.
+            if (serverMonitor != null) serverMonitor.reset();
+        }

        // Update the other monitors, setting coordinates, dimensions and the server terminal
        var pos = getBlockPos();
--- a/projects/common/src/main/java/dan200/computercraft/shared/peripheral/monitor/ServerMonitor.java
+++ b/projects/common/src/main/java/dan200/computercraft/shared/peripheral/monitor/ServerMonitor.java
@@ -55,6 +55,12 @@ public class ServerMonitor {
        }
    }

+    synchronized void reset() {
+        if (terminal == null) return;
+        terminal = null;
+        markChanged();
+    }
+
    private void markChanged() {
        if (!changed.getAndSet(true)) TickScheduler.schedule(origin.tickToken);
    }
--- a/projects/common/src/main/java/dan200/computercraft/shared/peripheral/speaker/SpeakerPeripheral.java
+++ b/projects/common/src/main/java/dan200/computercraft/shared/peripheral/speaker/SpeakerPeripheral.java
@@ -188,7 +188,7 @@ public abstract class SpeakerPeripheral implements IPeripheral {
     * {@literal false}.
     * <p>
     * ### Valid instruments
-     * The speaker supports [all of Minecraft's noteblock instruments](https://minecraft.fandom.com/wiki/Note_Block#Instruments).
+     * The speaker supports [all of Minecraft's noteblock instruments](https://minecraft.wiki/w/Note_Block#Instruments).
     * These are:
     * <p>
     * {@code "harp"}, {@code "basedrum"}, {@code "snare"}, {@code "hat"}, {@code "bass"}, {@code "flute"},
@@ -228,7 +228,7 @@ public abstract class SpeakerPeripheral implements IPeripheral {
    /**
     * Plays a Minecraft sound through the speaker.
     * <p>
-     * This takes the [name of a Minecraft sound](https://minecraft.fandom.com/wiki/Sounds.json), such as
+     * This takes the [name of a Minecraft sound](https://minecraft.wiki/w/Sounds.json), such as
     * {@code "minecraft:block.note_block.harp"}, as well as an optional volume and pitch.
     * <p>
     * Only one sound can be played at once. This function will return {@literal false} if another sound was started
--- a/projects/common/src/main/java/dan200/computercraft/shared/recipe/CustomShapedRecipe.java
+++ b/projects/common/src/main/java/dan200/computercraft/shared/recipe/CustomShapedRecipe.java
@@ -0,0 +1,86 @@
+// SPDX-FileCopyrightText: 2023 The CC: Tweaked Developers
+//
+// SPDX-License-Identifier: MPL-2.0
+
+package dan200.computercraft.shared.recipe;
+
+import com.google.gson.JsonObject;
+import com.google.gson.JsonParseException;
+import com.mojang.serialization.DataResult;
+import dan200.computercraft.shared.ModRegistry;
+import net.minecraft.Util;
+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.ShapedRecipe;
+
+/**
+ * A custom version of {@link ShapedRecipe}, which can be converted to and from a {@link ShapedRecipeSpec}.
+ * <p>
+ * This recipe may both be used as a normal recipe (behaving mostly the same as {@link ShapedRecipe}, with
+ * {@linkplain RecipeUtil#itemStackFromJson(JsonObject) support for putting nbt on the result}), or subclassed to
+ * customise the crafting behaviour.
+ */
+public class CustomShapedRecipe extends ShapedRecipe {
+    private final ItemStack result;
+
+    public CustomShapedRecipe(ResourceLocation id, ShapedRecipeSpec recipe) {
+        super(
+            id,
+            recipe.properties().group(), recipe.properties().category(),
+            recipe.template().width(), recipe.template().height(), recipe.template().ingredients(),
+            recipe.result()
+        );
+        this.result = recipe.result();
+    }
+
+    public final ShapedRecipeSpec toSpec() {
+        return new ShapedRecipeSpec(RecipeProperties.of(this), ShapedTemplate.of(this), result);
+    }
+
+    @Override
+    public RecipeSerializer<? extends CustomShapedRecipe> getSerializer() {
+        return ModRegistry.RecipeSerializers.SHAPED.get();
+    }
+
+    public interface Factory<R> {
+        R create(ResourceLocation id, ShapedRecipeSpec recipe);
+    }
+
+    public static <T extends CustomShapedRecipe> RecipeSerializer<T> serialiser(CustomShapedRecipe.Factory<T> factory) {
+        return new Serialiser<>((id, r) -> DataResult.success(factory.create(id, r)));
+    }
+
+    public static <T extends CustomShapedRecipe> RecipeSerializer<T> validatingSerialiser(CustomShapedRecipe.Factory<DataResult<T>> factory) {
+        return new Serialiser<>(factory);
+    }
+
+    private record Serialiser<T extends CustomShapedRecipe>(
+        Factory<DataResult<T>> factory
+    ) implements RecipeSerializer<T> {
+        private Serialiser(Factory<DataResult<T>> factory) {
+            this.factory = (id, r) -> factory.create(id, r).flatMap(x -> {
+                if (x.getSerializer() != this) {
+                    return DataResult.error(() -> "Expected serialiser to be " + this + ", but was " + x.getSerializer());
+                }
+                return DataResult.success(x);
+            });
+        }
+
+        @Override
+        public T fromJson(ResourceLocation id, JsonObject json) {
+            return Util.getOrThrow(factory.create(id, ShapedRecipeSpec.fromJson(json)), JsonParseException::new);
+        }
+
+        @Override
+        public T fromNetwork(ResourceLocation id, FriendlyByteBuf buffer) {
+            return Util.getOrThrow(factory.create(id, ShapedRecipeSpec.fromNetwork(buffer)), IllegalStateException::new);
+        }
+
+        @Override
+        public void toNetwork(FriendlyByteBuf buffer, T recipe) {
+            recipe.toSpec().toNetwork(buffer);
+        }
+    }
+}
--- a/projects/common/src/main/java/dan200/computercraft/shared/recipe/CustomShapelessRecipe.java
+++ b/projects/common/src/main/java/dan200/computercraft/shared/recipe/CustomShapelessRecipe.java
@@ -0,0 +1,81 @@
+// SPDX-FileCopyrightText: 2023 The CC: Tweaked Developers
+//
+// SPDX-License-Identifier: MPL-2.0
+
+package dan200.computercraft.shared.recipe;
+
+import com.google.gson.JsonObject;
+import com.google.gson.JsonParseException;
+import com.mojang.serialization.DataResult;
+import dan200.computercraft.shared.ModRegistry;
+import net.minecraft.Util;
+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.ShapelessRecipe;
+
+/**
+ * A custom version of {@link ShapelessRecipe}, which can be converted to and from a {@link ShapelessRecipeSpec}.
+ * <p>
+ * This recipe may both be used as a normal recipe (behaving mostly the same as {@link ShapelessRecipe}, with
+ * {@linkplain RecipeUtil#itemStackFromJson(JsonObject) support for putting nbt on the result}), or subclassed to
+ * customise the crafting behaviour.
+ */
+public class CustomShapelessRecipe extends ShapelessRecipe {
+    private final ItemStack result;
+
+    public CustomShapelessRecipe(ResourceLocation id, ShapelessRecipeSpec recipe) {
+        super(id, recipe.properties().group(), recipe.properties().category(), recipe.result(), recipe.ingredients());
+        this.result = recipe.result();
+    }
+
+    public final ShapelessRecipeSpec toSpec() {
+        return new ShapelessRecipeSpec(RecipeProperties.of(this), getIngredients(), result);
+    }
+
+    @Override
+    public RecipeSerializer<? extends CustomShapelessRecipe> getSerializer() {
+        return ModRegistry.RecipeSerializers.SHAPELESS.get();
+    }
+
+    public interface Factory<R> {
+        R create(ResourceLocation id, ShapelessRecipeSpec recipe);
+    }
+
+    public static <T extends CustomShapelessRecipe> RecipeSerializer<T> serialiser(Factory<T> factory) {
+        return new CustomShapelessRecipe.Serialiser<>((id, r) -> DataResult.success(factory.create(id, r)));
+    }
+
+    public static <T extends CustomShapelessRecipe> RecipeSerializer<T> validatingSerialiser(Factory<DataResult<T>> factory) {
+        return new CustomShapelessRecipe.Serialiser<>(factory);
+    }
+
+    private record Serialiser<T extends CustomShapelessRecipe>(
+        Factory<DataResult<T>> factory
+    ) implements RecipeSerializer<T> {
+        private Serialiser(Factory<DataResult<T>> factory) {
+            this.factory = (id, r) -> factory.create(id, r).flatMap(x -> {
+                if (x.getSerializer() != this) {
+                    return DataResult.error(() -> "Expected serialiser to be " + this + ", but was " + x.getSerializer());
+                }
+                return DataResult.success(x);
+            });
+        }
+
+        @Override
+        public T fromJson(ResourceLocation id, JsonObject json) {
+            return Util.getOrThrow(factory.create(id, ShapelessRecipeSpec.fromJson(json)), JsonParseException::new);
+        }
+
+        @Override
+        public T fromNetwork(ResourceLocation id, FriendlyByteBuf buffer) {
+            return Util.getOrThrow(factory.create(id, ShapelessRecipeSpec.fromNetwork(buffer)), IllegalStateException::new);
+        }
+
+        @Override
+        public void toNetwork(FriendlyByteBuf buffer, T recipe) {
+            recipe.toSpec().toNetwork(buffer);
+        }
+    }
+}
--- a/projects/common/src/main/java/dan200/computercraft/shared/recipe/ImpostorShapedRecipe.java
+++ b/projects/common/src/main/java/dan200/computercraft/shared/recipe/ImpostorShapedRecipe.java
@@ -0,0 +1,41 @@
+// Copyright Daniel Ratcliffe, 2011-2022. Do not distribute without permission.
+//
+// SPDX-License-Identifier: LicenseRef-CCPL
+
+package dan200.computercraft.shared.recipe;
+
+import dan200.computercraft.shared.ModRegistry;
+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.CustomRecipe;
+import net.minecraft.world.item.crafting.RecipeSerializer;
+import net.minecraft.world.item.crafting.ShapedRecipe;
+import net.minecraft.world.level.Level;
+
+/**
+ * A fake {@link ShapedRecipe}, which appears in the recipe book (and other recipe mods), but cannot be crafted.
+ * <p>
+ * This is used to represent examples for our {@link CustomRecipe}s.
+ */
+public final class ImpostorShapedRecipe extends CustomShapedRecipe {
+    public ImpostorShapedRecipe(ResourceLocation id, ShapedRecipeSpec recipe) {
+        super(id, recipe);
+    }
+
+    @Override
+    public boolean matches(CraftingContainer inv, Level world) {
+        return false;
+    }
+
+    @Override
+    public ItemStack assemble(CraftingContainer inventory, RegistryAccess registryAccess) {
+        return ItemStack.EMPTY;
+    }
+
+    @Override
+    public RecipeSerializer<ImpostorShapedRecipe> getSerializer() {
+        return ModRegistry.RecipeSerializers.IMPOSTOR_SHAPED.get();
+    }
+}
--- a/projects/common/src/main/java/dan200/computercraft/shared/recipe/ImpostorShapelessRecipe.java
+++ b/projects/common/src/main/java/dan200/computercraft/shared/recipe/ImpostorShapelessRecipe.java
@@ -0,0 +1,41 @@
+// Copyright Daniel Ratcliffe, 2011-2022. Do not distribute without permission.
+//
+// SPDX-License-Identifier: LicenseRef-CCPL
+
+package dan200.computercraft.shared.recipe;
+
+import dan200.computercraft.shared.ModRegistry;
+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.CustomRecipe;
+import net.minecraft.world.item.crafting.RecipeSerializer;
+import net.minecraft.world.item.crafting.ShapelessRecipe;
+import net.minecraft.world.level.Level;
+
+/**
+ * A fake {@link ShapelessRecipe}, which appears in the recipe book (and other recipe mods), but cannot be crafted.
+ * <p>
+ * This is used to represent examples for our {@link CustomRecipe}s.
+ */
+public final class ImpostorShapelessRecipe extends CustomShapelessRecipe {
+    public ImpostorShapelessRecipe(ResourceLocation id, ShapelessRecipeSpec recipe) {
+        super(id, recipe);
+    }
+
+    @Override
+    public boolean matches(CraftingContainer inv, Level world) {
+        return false;
+    }
+
+    @Override
+    public ItemStack assemble(CraftingContainer inventory, RegistryAccess access) {
+        return ItemStack.EMPTY;
+    }
+
+    @Override
+    public RecipeSerializer<ImpostorShapelessRecipe> getSerializer() {
+        return ModRegistry.RecipeSerializers.IMPOSTOR_SHAPELESS.get();
+    }
+}
--- a/projects/common/src/main/java/dan200/computercraft/shared/recipe/MoreCodecs.java
+++ b/projects/common/src/main/java/dan200/computercraft/shared/recipe/MoreCodecs.java
@@ -0,0 +1,33 @@
+// SPDX-FileCopyrightText: 2023 The CC: Tweaked Developers
+//
+// SPDX-License-Identifier: MPL-2.0
+
+package dan200.computercraft.shared.recipe;
+
+import com.mojang.brigadier.exceptions.CommandSyntaxException;
+import com.mojang.datafixers.util.Either;
+import com.mojang.serialization.Codec;
+import com.mojang.serialization.DataResult;
+import net.minecraft.nbt.CompoundTag;
+import net.minecraft.nbt.TagParser;
+
+/**
+ * Additional codecs for working with recipes.
+ */
+public class MoreCodecs {
+    /**
+     * A codec for {@link CompoundTag}s, which either accepts a NBT-string or a JSON object.
+     */
+    public static final Codec<CompoundTag> TAG = Codec.either(Codec.STRING, CompoundTag.CODEC).flatXmap(
+        either -> either.map(MoreCodecs::parseTag, DataResult::success),
+        nbtCompound -> DataResult.success(Either.left(nbtCompound.getAsString()))
+    );
+
+    private static DataResult<CompoundTag> parseTag(String contents) {
+        try {
+            return DataResult.success(TagParser.parseTag(contents));
+        } catch (CommandSyntaxException e) {
+            return DataResult.error(e::getMessage);
+        }
+    }
+}
--- a/projects/common/src/main/java/dan200/computercraft/shared/recipe/RecipeProperties.java
+++ b/projects/common/src/main/java/dan200/computercraft/shared/recipe/RecipeProperties.java
@@ -0,0 +1,40 @@
+// SPDX-FileCopyrightText: 2023 The CC: Tweaked Developers
+//
+// SPDX-License-Identifier: MPL-2.0
+
+package dan200.computercraft.shared.recipe;
+
+import com.google.gson.JsonObject;
+import net.minecraft.network.FriendlyByteBuf;
+import net.minecraft.util.GsonHelper;
+import net.minecraft.world.item.crafting.CraftingBookCategory;
+import net.minecraft.world.item.crafting.CraftingRecipe;
+
+/**
+ * Common properties that appear in all {@link CraftingRecipe}s.
+ *
+ * @param group    The (optional) group of the recipe, see {@link CraftingRecipe#getGroup()}.
+ * @param category The category the recipe appears in, see {@link CraftingRecipe#category()}.
+ */
+public record RecipeProperties(String group, CraftingBookCategory category) {
+    public static RecipeProperties of(CraftingRecipe recipe) {
+        return new RecipeProperties(recipe.getGroup(), recipe.category());
+    }
+
+    public static RecipeProperties fromJson(JsonObject json) {
+        var group = GsonHelper.getAsString(json, "group", "");
+        var category = CraftingBookCategory.CODEC.byName(GsonHelper.getAsString(json, "category", null), CraftingBookCategory.MISC);
+        return new RecipeProperties(group, category);
+    }
+
+    public static RecipeProperties fromNetwork(FriendlyByteBuf buffer) {
+        var group = buffer.readUtf();
+        var category = buffer.readEnum(CraftingBookCategory.class);
+        return new RecipeProperties(group, category);
+    }
+
+    public void toNetwork(FriendlyByteBuf buffer) {
+        buffer.writeUtf(group());
+        buffer.writeEnum(category());
+    }
+}
--- a/projects/common/src/main/java/dan200/computercraft/shared/recipe/RecipeUtil.java
+++ b/projects/common/src/main/java/dan200/computercraft/shared/recipe/RecipeUtil.java
@@ -0,0 +1,73 @@
+// SPDX-FileCopyrightText: 2017 The CC: Tweaked Developers
+//
+// SPDX-License-Identifier: MPL-2.0
+
+package dan200.computercraft.shared.recipe;
+
+import com.google.gson.JsonObject;
+import com.google.gson.JsonParseException;
+import com.google.gson.JsonSyntaxException;
+import com.mojang.serialization.JsonOps;
+import net.minecraft.Util;
+import net.minecraft.core.NonNullList;
+import net.minecraft.network.FriendlyByteBuf;
+import net.minecraft.util.GsonHelper;
+import net.minecraft.world.item.ItemStack;
+import net.minecraft.world.item.crafting.Ingredient;
+import net.minecraft.world.item.crafting.ShapedRecipe;
+
+public final class RecipeUtil {
+    private RecipeUtil() {
+    }
+
+    public static NonNullList<Ingredient> readIngredients(FriendlyByteBuf buffer) {
+        var count = buffer.readVarInt();
+        var ingredients = NonNullList.withSize(count, Ingredient.EMPTY);
+        for (var i = 0; i < ingredients.size(); i++) ingredients.set(i, Ingredient.fromNetwork(buffer));
+        return ingredients;
+    }
+
+    public static void writeIngredients(FriendlyByteBuf buffer, NonNullList<Ingredient> ingredients) {
+        buffer.writeCollection(ingredients, (a, b) -> b.toNetwork(a));
+    }
+
+    public static NonNullList<Ingredient> readShapelessIngredients(JsonObject json) {
+        NonNullList<Ingredient> ingredients = NonNullList.create();
+
+        var ingredientsList = GsonHelper.getAsJsonArray(json, "ingredients");
+        for (var i = 0; i < ingredientsList.size(); ++i) {
+            var ingredient = Ingredient.fromJson(ingredientsList.get(i));
+            if (!ingredient.isEmpty()) ingredients.add(ingredient);
+        }
+
+        if (ingredients.isEmpty()) throw new JsonParseException("No ingredients for shapeless recipe");
+        if (ingredients.size() > 9) {
+            throw new JsonParseException("Too many ingredients for shapeless recipe the max is 9");
+        }
+
+        return ingredients;
+    }
+
+    /**
+     * Extends {@link ShapedRecipe#itemStackFromJson(JsonObject)} with support for the {@code nbt} field.
+     *
+     * @param json The json to extract the item from.
+     * @return The parsed item stack.
+     */
+    public static ItemStack itemStackFromJson(JsonObject json) {
+        var item = ShapedRecipe.itemFromJson(json);
+        if (json.has("data")) throw new JsonParseException("Disallowed data tag found");
+
+        var count = GsonHelper.getAsInt(json, "count", 1);
+        if (count < 1) throw new JsonSyntaxException("Invalid output count: " + count);
+
+        var stack = new ItemStack(item, count);
+
+        var nbt = json.get("nbt");
+        if (nbt != null) {
+            stack.setTag(Util.getOrThrow(MoreCodecs.TAG.parse(JsonOps.INSTANCE, nbt), JsonParseException::new));
+        }
+        return stack;
+    }
+
+}
--- a/projects/common/src/main/java/dan200/computercraft/shared/recipe/ShapedRecipeSpec.java
+++ b/projects/common/src/main/java/dan200/computercraft/shared/recipe/ShapedRecipeSpec.java
@@ -0,0 +1,43 @@
+// SPDX-FileCopyrightText: 2023 The CC: Tweaked Developers
+//
+// SPDX-License-Identifier: MPL-2.0
+
+package dan200.computercraft.shared.recipe;
+
+import com.google.gson.JsonObject;
+import net.minecraft.network.FriendlyByteBuf;
+import net.minecraft.util.GsonHelper;
+import net.minecraft.world.item.ItemStack;
+import net.minecraft.world.item.crafting.ShapedRecipe;
+
+/**
+ * A description of a {@link ShapedRecipe}.
+ * <p>
+ * This is meant to be used in conjunction with {@link CustomShapedRecipe} for more reusable serialisation and
+ * deserialisation of {@link ShapedRecipe}-like recipes.
+ *
+ * @param properties The common properties of this recipe.
+ * @param template   The shaped template of the recipe.
+ * @param result     The result of the recipe.
+ */
+public record ShapedRecipeSpec(RecipeProperties properties, ShapedTemplate template, ItemStack result) {
+    public static ShapedRecipeSpec fromJson(JsonObject json) {
+        var properties = RecipeProperties.fromJson(json);
+        var template = ShapedTemplate.fromJson(json);
+        var result = RecipeUtil.itemStackFromJson(GsonHelper.getAsJsonObject(json, "result"));
+        return new ShapedRecipeSpec(properties, template, result);
+    }
+
+    public static ShapedRecipeSpec fromNetwork(FriendlyByteBuf buffer) {
+        var properties = RecipeProperties.fromNetwork(buffer);
+        var template = ShapedTemplate.fromNetwork(buffer);
+        var result = buffer.readItem();
+        return new ShapedRecipeSpec(properties, template, result);
+    }
+
+    public void toNetwork(FriendlyByteBuf buffer) {
+        properties().toNetwork(buffer);
+        template().toNetwork(buffer);
+        buffer.writeItem(result());
+    }
+}
--- a/projects/common/src/main/java/dan200/computercraft/shared/recipe/ShapedTemplate.java
+++ b/projects/common/src/main/java/dan200/computercraft/shared/recipe/ShapedTemplate.java
@@ -0,0 +1,99 @@
+// SPDX-FileCopyrightText: 2023 The CC: Tweaked Developers
+//
+// SPDX-License-Identifier: MPL-2.0
+
+package dan200.computercraft.shared.recipe;
+
+import com.google.gson.JsonObject;
+import com.google.gson.JsonSyntaxException;
+import net.minecraft.core.NonNullList;
+import net.minecraft.network.FriendlyByteBuf;
+import net.minecraft.util.GsonHelper;
+import net.minecraft.world.item.crafting.Ingredient;
+import net.minecraft.world.item.crafting.ShapedRecipe;
+
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
+
+/**
+ * The template for {@linkplain ShapedRecipe shaped recipes}. This largely exists for parsing shaped recipes from JSON.
+ *
+ * @param width       The width of the recipe, see {@link ShapedRecipe#getWidth()}.
+ * @param height      The height of the recipe, see {@link ShapedRecipe#getHeight()}.
+ * @param ingredients The ingredients in the recipe, see {@link ShapedRecipe#getIngredients()}
+ */
+public record ShapedTemplate(int width, int height, NonNullList<Ingredient> ingredients) {
+    public static ShapedTemplate of(ShapedRecipe recipe) {
+        return new ShapedTemplate(recipe.getWidth(), recipe.getHeight(), recipe.getIngredients());
+    }
+
+    public static ShapedTemplate fromJson(JsonObject json) {
+        Map<Character, Ingredient> key = new HashMap<>();
+        for (var entry : GsonHelper.getAsJsonObject(json, "key").entrySet()) {
+            if (entry.getKey().length() != 1) {
+                throw new JsonSyntaxException("Invalid key entry: '" + entry.getKey() + "' is an invalid symbol (must be 1 character only).");
+            }
+            if (" ".equals(entry.getKey())) {
+                throw new JsonSyntaxException("Invalid key entry: ' ' is a reserved symbol.");
+            }
+
+            key.put(entry.getKey().charAt(0), Ingredient.fromJson(entry.getValue()));
+        }
+
+        var patternList = GsonHelper.getAsJsonArray(json, "pattern");
+        if (patternList.size() == 0) {
+            throw new JsonSyntaxException("Invalid pattern: empty pattern not allowed");
+        }
+
+        var pattern = new String[patternList.size()];
+        for (var x = 0; x < pattern.length; x++) {
+            var line = GsonHelper.convertToString(patternList.get(x), "pattern[" + x + "]");
+            if (x > 0 && pattern[0].length() != line.length()) {
+                throw new JsonSyntaxException("Invalid pattern: each row must  be the same width");
+            }
+            pattern[x] = line;
+        }
+
+        var width = pattern[0].length();
+        var height = pattern.length;
+        var ingredients = NonNullList.withSize(width * height, Ingredient.EMPTY);
+
+        Set<Character> missingKeys = new HashSet<>(key.keySet());
+
+        var ingredientIdx = 0;
+        for (var line : pattern) {
+            for (var x = 0; x < line.length(); x++) {
+                var chr = line.charAt(x);
+                var ing = chr == ' ' ? Ingredient.EMPTY : key.get(chr);
+                if (ing == null) {
+                    throw new JsonSyntaxException("Pattern references symbol '" + chr + "' but it's not defined in the key");
+                }
+                ingredients.set(ingredientIdx++, ing);
+                missingKeys.remove(chr);
+            }
+        }
+
+        if (!missingKeys.isEmpty()) {
+            throw new JsonSyntaxException("Key defines symbols that aren't used in pattern: " + missingKeys);
+        }
+
+        return new ShapedTemplate(width, height, ingredients);
+    }
+
+    public static ShapedTemplate fromNetwork(FriendlyByteBuf buffer) {
+        var width = buffer.readVarInt();
+        var height = buffer.readVarInt();
+        var ingredients = NonNullList.withSize(width * height, Ingredient.EMPTY);
+        for (var i = 0; i < ingredients.size(); ++i) ingredients.set(i, Ingredient.fromNetwork(buffer));
+        return new ShapedTemplate(width, height, ingredients);
+    }
+
+    public void toNetwork(FriendlyByteBuf buffer) {
+        buffer.writeVarInt(width());
+        buffer.writeVarInt(height());
+        for (var ingredient : ingredients) ingredient.toNetwork(buffer);
+    }
+
+}
--- a/projects/common/src/main/java/dan200/computercraft/shared/recipe/ShapelessRecipeSpec.java
+++ b/projects/common/src/main/java/dan200/computercraft/shared/recipe/ShapelessRecipeSpec.java
@@ -0,0 +1,46 @@
+// SPDX-FileCopyrightText: 2023 The CC: Tweaked Developers
+//
+// SPDX-License-Identifier: MPL-2.0
+
+package dan200.computercraft.shared.recipe;
+
+import com.google.gson.JsonObject;
+import net.minecraft.core.NonNullList;
+import net.minecraft.network.FriendlyByteBuf;
+import net.minecraft.util.GsonHelper;
+import net.minecraft.world.item.ItemStack;
+import net.minecraft.world.item.crafting.Ingredient;
+import net.minecraft.world.item.crafting.ShapelessRecipe;
+
+/**
+ * A description of a {@link ShapelessRecipe}.
+ * <p>
+ * This is meant to be used in conjunction with {@link CustomShapelessRecipe} for more reusable serialisation and
+ * deserialisation of {@link ShapelessRecipe}-like recipes.
+ *
+ * @param properties  The common properties of this recipe.
+ * @param ingredients The ingredients of the recipe.
+ * @param result      The result of the recipe.
+ */
+public record ShapelessRecipeSpec(RecipeProperties properties, NonNullList<Ingredient> ingredients, ItemStack result) {
+    public static ShapelessRecipeSpec fromJson(JsonObject json) {
+        var properties = RecipeProperties.fromJson(json);
+        var ingredients = RecipeUtil.readShapelessIngredients(json);
+        var result = RecipeUtil.itemStackFromJson(GsonHelper.getAsJsonObject(json, "result"));
+        return new ShapelessRecipeSpec(properties, ingredients, result);
+    }
+
+    public static ShapelessRecipeSpec fromNetwork(FriendlyByteBuf buffer) {
+        var properties = RecipeProperties.fromNetwork(buffer);
+        var ingredients = RecipeUtil.readIngredients(buffer);
+        var result = buffer.readItem();
+
+        return new ShapelessRecipeSpec(properties, ingredients, result);
+    }
+
+    public void toNetwork(FriendlyByteBuf buffer) {
+        properties().toNetwork(buffer);
+        RecipeUtil.writeIngredients(buffer, ingredients());
+        buffer.writeItem(result());
+    }
+}
--- a/projects/common/src/main/java/dan200/computercraft/shared/turtle/core/TurtlePlaceCommand.java
+++ b/projects/common/src/main/java/dan200/computercraft/shared/turtle/core/TurtlePlaceCommand.java
@@ -239,7 +239,7 @@ public class TurtlePlaceCommand implements TurtleCommand {
        world.sendBlockUpdated(tile.getBlockPos(), tile.getBlockState(), tile.getBlockState(), Block.UPDATE_ALL);
    }

-    private static class ErrorMessage {
+    private static final class ErrorMessage {
        @Nullable
        String message;
    }
--- a/projects/common/src/main/java/dan200/computercraft/shared/turtle/recipes/TurtleOverlayRecipe.java
+++ b/projects/common/src/main/java/dan200/computercraft/shared/turtle/recipes/TurtleOverlayRecipe.java
@@ -4,32 +4,30 @@

 package dan200.computercraft.shared.turtle.recipes;

-import com.google.gson.JsonArray;
 import com.google.gson.JsonObject;
-import com.google.gson.JsonParseException;
 import dan200.computercraft.api.turtle.TurtleSide;
 import dan200.computercraft.shared.ModRegistry;
+import dan200.computercraft.shared.recipe.CustomShapelessRecipe;
+import dan200.computercraft.shared.recipe.ShapelessRecipeSpec;
 import dan200.computercraft.shared.turtle.items.TurtleItem;
-import net.minecraft.core.NonNullList;
 import net.minecraft.core.RegistryAccess;
 import net.minecraft.network.FriendlyByteBuf;
 import net.minecraft.resources.ResourceLocation;
 import net.minecraft.util.GsonHelper;
 import net.minecraft.world.inventory.CraftingContainer;
 import net.minecraft.world.item.ItemStack;
-import net.minecraft.world.item.crafting.*;
+import net.minecraft.world.item.crafting.RecipeSerializer;
+import net.minecraft.world.item.crafting.ShapelessRecipe;

 /**
 * A {@link ShapelessRecipe} which sets the {@linkplain TurtleItem#getOverlay(ItemStack)} turtle's overlay} instead.
 */
-public class TurtleOverlayRecipe extends ShapelessRecipe {
+public class TurtleOverlayRecipe extends CustomShapelessRecipe {
    private final ResourceLocation overlay;
-    private final ItemStack result;

-    public TurtleOverlayRecipe(ResourceLocation id, String group, CraftingBookCategory category, ItemStack result, NonNullList<Ingredient> ingredients, ResourceLocation overlay) {
-        super(id, group, category, result, ingredients);
+    public TurtleOverlayRecipe(ResourceLocation id, ShapelessRecipeSpec spec, ResourceLocation overlay) {
+        super(id, spec);
        this.overlay = overlay;
-        this.result = result;
    }

    private static ItemStack make(ItemStack stack, ResourceLocation overlay) {
@@ -56,63 +54,29 @@ public class TurtleOverlayRecipe extends ShapelessRecipe {
    }

    @Override
-    public RecipeSerializer<?> getSerializer() {
+    public RecipeSerializer<TurtleOverlayRecipe> getSerializer() {
        return ModRegistry.RecipeSerializers.TURTLE_OVERLAY.get();
    }

    public static class Serializer implements RecipeSerializer<TurtleOverlayRecipe> {
        @Override
        public TurtleOverlayRecipe fromJson(ResourceLocation id, JsonObject json) {
-            var group = GsonHelper.getAsString(json, "group", "");
-            var category = CraftingBookCategory.CODEC.byName(GsonHelper.getAsString(json, "category", null), CraftingBookCategory.MISC);
-            var ingredients = readIngredients(GsonHelper.getAsJsonArray(json, "ingredients"));
-
-            if (ingredients.isEmpty()) throw new JsonParseException("No ingredients for shapeless recipe");
-            if (ingredients.size() > 9) {
-                throw new JsonParseException("Too many ingredients for shapeless recipe the max is 9");
-            }
-
+            var recipe = ShapelessRecipeSpec.fromJson(json);
            var overlay = new ResourceLocation(GsonHelper.getAsString(json, "overlay"));

-            // We could derive this from the ingredients, but we want to avoid evaluating the ingredients too early, so
-            // it's easier to do this.
-            var result = make(ShapedRecipe.itemStackFromJson(GsonHelper.getAsJsonObject(json, "result")), overlay);
-
-            return new TurtleOverlayRecipe(id, group, category, result, ingredients, overlay);
-        }
-
-        private NonNullList<Ingredient> readIngredients(JsonArray arrays) {
-            NonNullList<Ingredient> items = NonNullList.create();
-            for (var i = 0; i < arrays.size(); ++i) {
-                var ingredient = Ingredient.fromJson(arrays.get(i));
-                if (!ingredient.isEmpty()) items.add(ingredient);
-            }
-
-            return items;
+            return new TurtleOverlayRecipe(id, recipe, overlay);
        }

        @Override
        public TurtleOverlayRecipe fromNetwork(ResourceLocation id, FriendlyByteBuf buffer) {
-            var group = buffer.readUtf();
-            var category = buffer.readEnum(CraftingBookCategory.class);
-            var count = buffer.readVarInt();
-            var items = NonNullList.withSize(count, Ingredient.EMPTY);
-
-            for (var j = 0; j < items.size(); j++) items.set(j, Ingredient.fromNetwork(buffer));
-            var result = buffer.readItem();
+            var recipe = ShapelessRecipeSpec.fromNetwork(buffer);
            var overlay = buffer.readResourceLocation();
-
-            return new TurtleOverlayRecipe(id, group, category, result, items, overlay);
+            return new TurtleOverlayRecipe(id, recipe, overlay);
        }

        @Override
        public void toNetwork(FriendlyByteBuf buffer, TurtleOverlayRecipe recipe) {
-            buffer.writeUtf(recipe.getGroup());
-            buffer.writeEnum(recipe.category());
-            buffer.writeVarInt(recipe.getIngredients().size());
-
-            for (var ingredient : recipe.getIngredients()) ingredient.toNetwork(buffer);
-            buffer.writeItem(recipe.result);
+            recipe.toSpec().toNetwork(buffer);
            buffer.writeResourceLocation(recipe.overlay);
        }
    }
--- a/projects/common/src/main/java/dan200/computercraft/shared/turtle/recipes/TurtleRecipe.java
+++ b/projects/common/src/main/java/dan200/computercraft/shared/turtle/recipes/TurtleRecipe.java
@@ -4,26 +4,33 @@

 package dan200.computercraft.shared.turtle.recipes;

+import com.mojang.serialization.DataResult;
 import dan200.computercraft.shared.ModRegistry;
-import dan200.computercraft.shared.computer.core.ComputerFamily;
 import dan200.computercraft.shared.computer.items.IComputerItem;
-import dan200.computercraft.shared.computer.recipe.ComputerFamilyRecipe;
+import dan200.computercraft.shared.computer.recipe.ComputerConvertRecipe;
+import dan200.computercraft.shared.recipe.ShapedRecipeSpec;
 import dan200.computercraft.shared.turtle.items.TurtleItem;
-import net.minecraft.core.NonNullList;
 import net.minecraft.resources.ResourceLocation;
 import net.minecraft.world.item.ItemStack;
-import net.minecraft.world.item.crafting.CraftingBookCategory;
-import net.minecraft.world.item.crafting.Ingredient;
 import net.minecraft.world.item.crafting.RecipeSerializer;

-public final class TurtleRecipe extends ComputerFamilyRecipe {
-    public TurtleRecipe(ResourceLocation identifier, String group, CraftingBookCategory category, int width, int height, NonNullList<Ingredient> ingredients, ItemStack result, ComputerFamily family) {
-        super(identifier, group, category, width, height, ingredients, result, family);
+/**
+ * The recipe which crafts a turtle from an existing computer item.
+ */
+public final class TurtleRecipe extends ComputerConvertRecipe {
+    private final TurtleItem turtle;
+
+    private TurtleRecipe(ResourceLocation id, ShapedRecipeSpec recipe, TurtleItem turtle) {
+        super(id, recipe);
+        this.turtle = turtle;
    }

-    @Override
-    public RecipeSerializer<?> getSerializer() {
-        return ModRegistry.RecipeSerializers.TURTLE.get();
+    public static DataResult<TurtleRecipe> of(ResourceLocation id, ShapedRecipeSpec recipe) {
+        if (!(recipe.result().getItem() instanceof TurtleItem turtle)) {
+            return DataResult.error(() -> recipe.result().getItem() + " is not a turtle item");
+        }
+
+        return DataResult.success(new TurtleRecipe(id, recipe, turtle));
    }

    @Override
@@ -31,13 +38,11 @@ public final class TurtleRecipe extends ComputerFamilyRecipe {
        var computerID = item.getComputerID(stack);
        var label = item.getLabel(stack);

-        return TurtleItem.create(computerID, label, -1, getFamily(), null, null, 0, null);
+        return turtle.create(computerID, label, -1, null, null, 0, null);
    }

-    public static class Serializer extends ComputerFamilyRecipe.Serializer<TurtleRecipe> {
-        @Override
-        protected TurtleRecipe create(ResourceLocation identifier, String group, CraftingBookCategory category, int width, int height, NonNullList<Ingredient> ingredients, ItemStack result, ComputerFamily family) {
-            return new TurtleRecipe(identifier, group, category, width, height, ingredients, result, family);
-        }
+    @Override
+    public RecipeSerializer<TurtleRecipe> getSerializer() {
+        return ModRegistry.RecipeSerializers.TURTLE.get();
    }
 }
--- a/projects/common/src/main/java/dan200/computercraft/shared/util/ImpostorRecipe.java
+++ b/projects/common/src/main/java/dan200/computercraft/shared/util/ImpostorRecipe.java
@@ -1,88 +0,0 @@
-// Copyright Daniel Ratcliffe, 2011-2022. Do not distribute without permission.
-//
-// SPDX-License-Identifier: LicenseRef-CCPL
-
-package dan200.computercraft.shared.util;
-
-import com.google.gson.JsonObject;
-import dan200.computercraft.shared.ModRegistry;
-import net.minecraft.core.NonNullList;
-import net.minecraft.core.RegistryAccess;
-import net.minecraft.network.FriendlyByteBuf;
-import net.minecraft.resources.ResourceLocation;
-import net.minecraft.util.GsonHelper;
-import net.minecraft.world.inventory.CraftingContainer;
-import net.minecraft.world.item.ItemStack;
-import net.minecraft.world.item.crafting.CraftingBookCategory;
-import net.minecraft.world.item.crafting.Ingredient;
-import net.minecraft.world.item.crafting.RecipeSerializer;
-import net.minecraft.world.item.crafting.ShapedRecipe;
-import net.minecraft.world.level.Level;
-
-public final class ImpostorRecipe extends ShapedRecipe {
-    private final String group;
-    private final ItemStack result;
-
-    private ImpostorRecipe(ResourceLocation id, String group, CraftingBookCategory category, int width, int height, NonNullList<Ingredient> ingredients, ItemStack result) {
-        super(id, group, category, width, height, ingredients, result);
-        this.group = group;
-        this.result = result;
-    }
-
-    @Override
-    public String getGroup() {
-        return group;
-    }
-
-    ItemStack getResultItem() {
-        return result;
-    }
-
-    @Override
-    public boolean matches(CraftingContainer inv, Level world) {
-        return false;
-    }
-
-    @Override
-    public ItemStack assemble(CraftingContainer inventory, RegistryAccess registryAccess) {
-        return ItemStack.EMPTY;
-    }
-
-    @Override
-    public RecipeSerializer<?> getSerializer() {
-        return ModRegistry.RecipeSerializers.IMPOSTOR_SHAPED.get();
-    }
-
-    public static class Serializer implements RecipeSerializer<ImpostorRecipe> {
-        @Override
-        public ImpostorRecipe fromJson(ResourceLocation identifier, JsonObject json) {
-            var group = GsonHelper.getAsString(json, "group", "");
-            var category = CraftingBookCategory.CODEC.byName(GsonHelper.getAsString(json, "category", null), CraftingBookCategory.MISC);
-            var recipe = RecipeSerializer.SHAPED_RECIPE.fromJson(identifier, json);
-            var result = ShapedRecipe.itemStackFromJson(GsonHelper.getAsJsonObject(json, "result"));
-            return new ImpostorRecipe(identifier, group, category, recipe.getWidth(), recipe.getHeight(), recipe.getIngredients(), result);
-        }
-
-        @Override
-        public ImpostorRecipe fromNetwork(ResourceLocation identifier, FriendlyByteBuf buf) {
-            var width = buf.readVarInt();
-            var height = buf.readVarInt();
-            var group = buf.readUtf(Short.MAX_VALUE);
-            var category = buf.readEnum(CraftingBookCategory.class);
-            var items = NonNullList.withSize(width * height, Ingredient.EMPTY);
-            for (var k = 0; k < items.size(); k++) items.set(k, Ingredient.fromNetwork(buf));
-            var result = buf.readItem();
-            return new ImpostorRecipe(identifier, group, category, width, height, items, result);
-        }
-
-        @Override
-        public void toNetwork(FriendlyByteBuf buf, ImpostorRecipe recipe) {
-            buf.writeVarInt(recipe.getWidth());
-            buf.writeVarInt(recipe.getHeight());
-            buf.writeUtf(recipe.getGroup());
-            buf.writeEnum(recipe.category());
-            for (var ingredient : recipe.getIngredients()) ingredient.toNetwork(buf);
-            buf.writeItem(recipe.getResultItem());
-        }
-    }
-}
--- a/projects/common/src/main/java/dan200/computercraft/shared/util/ImpostorShapelessRecipe.java
+++ b/projects/common/src/main/java/dan200/computercraft/shared/util/ImpostorShapelessRecipe.java
@@ -1,104 +0,0 @@
-// Copyright Daniel Ratcliffe, 2011-2022. Do not distribute without permission.
-//
-// SPDX-License-Identifier: LicenseRef-CCPL
-
-package dan200.computercraft.shared.util;
-
-import com.google.gson.JsonArray;
-import com.google.gson.JsonObject;
-import com.google.gson.JsonParseException;
-import dan200.computercraft.shared.ModRegistry;
-import net.minecraft.core.NonNullList;
-import net.minecraft.core.RegistryAccess;
-import net.minecraft.network.FriendlyByteBuf;
-import net.minecraft.resources.ResourceLocation;
-import net.minecraft.util.GsonHelper;
-import net.minecraft.world.inventory.CraftingContainer;
-import net.minecraft.world.item.ItemStack;
-import net.minecraft.world.item.crafting.*;
-import net.minecraft.world.level.Level;
-
-public final class ImpostorShapelessRecipe extends ShapelessRecipe {
-    private final String group;
-    private final ItemStack result;
-
-    private ImpostorShapelessRecipe(ResourceLocation id, String group, CraftingBookCategory category, ItemStack result, NonNullList<Ingredient> ingredients) {
-        super(id, group, category, result, ingredients);
-        this.group = group;
-        this.result = result;
-    }
-
-    @Override
-    public String getGroup() {
-        return group;
-    }
-
-    ItemStack getResultItem() {
-        return result;
-    }
-
-    @Override
-    public boolean matches(CraftingContainer inv, Level world) {
-        return false;
-    }
-
-    @Override
-    public ItemStack assemble(CraftingContainer inventory, RegistryAccess access) {
-        return ItemStack.EMPTY;
-    }
-
-    @Override
-    public RecipeSerializer<?> getSerializer() {
-        return ModRegistry.RecipeSerializers.IMPOSTOR_SHAPELESS.get();
-    }
-
-    public static final class Serializer implements RecipeSerializer<ImpostorShapelessRecipe> {
-        @Override
-        public ImpostorShapelessRecipe fromJson(ResourceLocation id, JsonObject json) {
-            var group = GsonHelper.getAsString(json, "group", "");
-            var category = CraftingBookCategory.CODEC.byName(GsonHelper.getAsString(json, "category", null), CraftingBookCategory.MISC);
-            var ingredients = readIngredients(GsonHelper.getAsJsonArray(json, "ingredients"));
-
-            if (ingredients.isEmpty()) throw new JsonParseException("No ingredients for shapeless recipe");
-            if (ingredients.size() > 9) {
-                throw new JsonParseException("Too many ingredients for shapeless recipe the max is 9");
-            }
-
-            var result = ShapedRecipe.itemStackFromJson(GsonHelper.getAsJsonObject(json, "result"));
-            return new ImpostorShapelessRecipe(id, group, category, result, ingredients);
-        }
-
-        private NonNullList<Ingredient> readIngredients(JsonArray arrays) {
-            NonNullList<Ingredient> items = NonNullList.create();
-            for (var i = 0; i < arrays.size(); ++i) {
-                var ingredient = Ingredient.fromJson(arrays.get(i));
-                if (!ingredient.isEmpty()) items.add(ingredient);
-            }
-
-            return items;
-        }
-
-        @Override
-        public ImpostorShapelessRecipe fromNetwork(ResourceLocation id, FriendlyByteBuf buffer) {
-            var group = buffer.readUtf();
-            var category = buffer.readEnum(CraftingBookCategory.class);
-            var count = buffer.readVarInt();
-            var items = NonNullList.withSize(count, Ingredient.EMPTY);
-
-            for (var j = 0; j < items.size(); j++) items.set(j, Ingredient.fromNetwork(buffer));
-            var result = buffer.readItem();
-
-            return new ImpostorShapelessRecipe(id, group, category, result, items);
-        }
-
-        @Override
-        public void toNetwork(FriendlyByteBuf buffer, ImpostorShapelessRecipe recipe) {
-            buffer.writeUtf(recipe.getGroup());
-            buffer.writeEnum(recipe.category());
-            buffer.writeVarInt(recipe.getIngredients().size());
-
-            for (var ingredient : recipe.getIngredients()) ingredient.toNetwork(buffer);
-            buffer.writeItem(recipe.getResultItem());
-        }
-    }
-}
--- a/projects/common/src/main/java/dan200/computercraft/shared/util/RecipeUtil.java
+++ b/projects/common/src/main/java/dan200/computercraft/shared/util/RecipeUtil.java
@@ -1,94 +0,0 @@
-// SPDX-FileCopyrightText: 2017 The CC: Tweaked Developers
-//
-// SPDX-License-Identifier: MPL-2.0
-
-package dan200.computercraft.shared.util;
-
-import com.google.common.collect.Maps;
-import com.google.common.collect.Sets;
-import com.google.gson.JsonObject;
-import com.google.gson.JsonSyntaxException;
-import dan200.computercraft.shared.computer.core.ComputerFamily;
-import net.minecraft.core.NonNullList;
-import net.minecraft.util.GsonHelper;
-import net.minecraft.world.item.crafting.Ingredient;
-
-import java.util.Map;
-import java.util.Set;
-
-// TODO: Replace some things with Forge??
-
-public final class RecipeUtil {
-    private RecipeUtil() {
-    }
-
-    public record ShapedTemplate(int width, int height, NonNullList<Ingredient> ingredients) {
-    }
-
-    public static ShapedTemplate getTemplate(JsonObject json) {
-        Map<Character, Ingredient> ingMap = Maps.newHashMap();
-        for (var entry : GsonHelper.getAsJsonObject(json, "key").entrySet()) {
-            if (entry.getKey().length() != 1) {
-                throw new JsonSyntaxException("Invalid key entry: '" + entry.getKey() + "' is an invalid symbol (must be 1 character only).");
-            }
-            if (" ".equals(entry.getKey())) {
-                throw new JsonSyntaxException("Invalid key entry: ' ' is a reserved symbol.");
-            }
-
-            ingMap.put(entry.getKey().charAt(0), Ingredient.fromJson(entry.getValue()));
-        }
-
-        ingMap.put(' ', Ingredient.EMPTY);
-
-        var patternJ = GsonHelper.getAsJsonArray(json, "pattern");
-
-        if (patternJ.size() == 0) {
-            throw new JsonSyntaxException("Invalid pattern: empty pattern not allowed");
-        }
-
-        var pattern = new String[patternJ.size()];
-        for (var x = 0; x < pattern.length; x++) {
-            var line = GsonHelper.convertToString(patternJ.get(x), "pattern[" + x + "]");
-            if (x > 0 && pattern[0].length() != line.length()) {
-                throw new JsonSyntaxException("Invalid pattern: each row must  be the same width");
-            }
-            pattern[x] = line;
-        }
-
-        var width = pattern[0].length();
-        var height = pattern.length;
-        var ingredients = NonNullList.withSize(width * height, Ingredient.EMPTY);
-
-        Set<Character> missingKeys = Sets.newHashSet(ingMap.keySet());
-        missingKeys.remove(' ');
-
-        var ingredientIdx = 0;
-        for (var line : pattern) {
-            for (var i = 0; i < line.length(); i++) {
-                var chr = line.charAt(i);
-
-                var ing = ingMap.get(chr);
-                if (ing == null) {
-                    throw new JsonSyntaxException("Pattern references symbol '" + chr + "' but it's not defined in the key");
-                }
-                ingredients.set(ingredientIdx++, ing);
-                missingKeys.remove(chr);
-            }
-        }
-
-        if (!missingKeys.isEmpty()) {
-            throw new JsonSyntaxException("Key defines symbols that aren't used in pattern: " + missingKeys);
-        }
-
-        return new ShapedTemplate(width, height, ingredients);
-    }
-
-    public static ComputerFamily getFamily(JsonObject json, String name) {
-        var familyName = GsonHelper.getAsString(json, name);
-        for (var family : ComputerFamily.values()) {
-            if (family.name().equalsIgnoreCase(familyName)) return family;
-        }
-
-        throw new JsonSyntaxException("Unknown computer family '" + familyName + "' for field " + name);
-    }
-}
--- a/projects/common/src/main/resources/assets/computercraft/lang/cs_cz.json
+++ b/projects/common/src/main/resources/assets/computercraft/lang/cs_cz.json
@@ -47,8 +47,6 @@
    "commands.computercraft.synopsis": "Různé příkazy pro ovládání počítačů.",
    "commands.computercraft.tp.action": "Teleportovat se k počítači",
    "commands.computercraft.tp.desc": "Teleportovat se na místo počítače. Můžeš specifikovat ID počítačové instance (tř. 123) nebo ID počítače (tř. #123).",
-    "commands.computercraft.tp.not_player": "Nelze otevřít terminál pro nehráče",
-    "commands.computercraft.tp.not_there": "Nelze najít počítač ve světě",
    "commands.computercraft.tp.synopsis": "Teleportovat se ke specifickému počítači.",
    "commands.computercraft.track.desc": "Sledovat jak dlouho se počítače spustí, a také kolik událostí zpracují. Toto uvádí informace v podobné cestě jako /forge track a může být dobré pro diagnostiku lagu.",
    "commands.computercraft.track.dump.computer": "Počítač",
--- a/projects/common/src/main/resources/assets/computercraft/lang/de_de.json
+++ b/projects/common/src/main/resources/assets/computercraft/lang/de_de.json
@@ -46,8 +46,6 @@
    "commands.computercraft.synopsis": "Verschiedene Befehle um Computer zu kontrollieren.",
    "commands.computercraft.tp.action": "Teleportiert dich zum Computer",
    "commands.computercraft.tp.desc": "Teleportiert dich zum Standort eines Computers. Der Computer kann entweder über seine Instanz ID (z.B. 123), seine Computer ID (z.B. #123) oder seinen Namen (z.B. \"@Mein Computer\") angegeben werden.",
-    "commands.computercraft.tp.not_player": "Konnte Terminal für Nicht-Spieler nicht öffnen",
-    "commands.computercraft.tp.not_there": "Konnte Computer in der Welt nicht finden",
    "commands.computercraft.tp.synopsis": "Teleportiert dich zum angegebenen Computer.",
    "commands.computercraft.track.desc": "Zeichnet die Laufzeiten von Computern und wie viele Events ausgelöst werden auf. Die Ausgabe der Informationen ist ähnlich zu /forge track, was beim aufspüren von Lags sehr hilfreich sein kann.",
    "commands.computercraft.track.dump.computer": "Computer",
--- a/projects/common/src/main/resources/assets/computercraft/lang/fr_fr.json
+++ b/projects/common/src/main/resources/assets/computercraft/lang/fr_fr.json
@@ -47,8 +47,6 @@
    "commands.computercraft.synopsis": "Commandes diverses pour contrôler les ordinateurs.",
    "commands.computercraft.tp.action": "Se téléporter vers cet ordinateur",
    "commands.computercraft.tp.desc": "Se téléporter à la position de l'ordinateur. Vous pouvez spécifier l'identifiant d'instance (ex. 123) ou l'identifiant d'ordinateur (ex. #123).",
-    "commands.computercraft.tp.not_player": "Impossible d'ouvrir un terminal pour un non-joueur",
-    "commands.computercraft.tp.not_there": "Impossible de localiser cet ordinateur dans le monde",
    "commands.computercraft.tp.synopsis": "Se téléporter à la position de l'ordinateur spécifié.",
    "commands.computercraft.track.desc": "Surveillez combien de temps prend une exécutions sur les ordinateurs, ainsi que le nombre d’événements capturés. Les informations sont affichées d'une manière similaire à la commande /forge track, utile pour diagnostiquer les sources de latence.",
    "commands.computercraft.track.dump.computer": "Ordinateur",
--- a/projects/common/src/main/resources/assets/computercraft/lang/it_it.json
+++ b/projects/common/src/main/resources/assets/computercraft/lang/it_it.json
@@ -47,8 +47,6 @@
    "commands.computercraft.synopsis": "Vari comandi per controllare i computer.",
    "commands.computercraft.tp.action": "Teletrasporta a questo computer",
    "commands.computercraft.tp.desc": "Teletrasporta alla posizione di un computer. Puoi specificare il computer con l'instance id (e.g. 123) o con l'id (e.g. #123).",
-    "commands.computercraft.tp.not_player": "Non è possibile aprire un terminale per un non giocatore",
-    "commands.computercraft.tp.not_there": "Impossibile trovare il computer nel mondo",
    "commands.computercraft.tp.synopsis": "Teletrasporta al computer specificato.",
    "commands.computercraft.track.desc": "Monitora per quanto tempo i computer vengono eseguiti e quanti eventi ricevono. Questo comando fornisce le informazioni in modo simile a /forge track e può essere utile per diagnosticare il lag.",
    "commands.computercraft.track.dump.computer": "Computer",
--- a/projects/common/src/main/resources/assets/computercraft/lang/ja_jp.json
+++ b/projects/common/src/main/resources/assets/computercraft/lang/ja_jp.json
@@ -47,8 +47,6 @@
    "commands.computercraft.synopsis": "コンピュータを制御するためのさまざまなコマンド。",
    "commands.computercraft.tp.action": "このコンピューターへテレポートします",
    "commands.computercraft.tp.desc": "コンピュータの場所にテレポート.コンピュータのインスタンスID（例えば 123）またはコンピュータID（例えば #123）を指定することができます。",
-    "commands.computercraft.tp.not_player": "非プレイヤー用のターミナルを開くことができません",
-    "commands.computercraft.tp.not_there": "世界でコンピュータを見つけることができませんでした",
    "commands.computercraft.tp.synopsis": "特定のコンピュータにテレポート。",
    "commands.computercraft.track.desc": "コンピュータの実行時間を追跡するだけでなく、イベントを確認することができます。 これは /forge と同様の方法で情報を提示し、遅れを診断するのに役立ちます。",
    "commands.computercraft.track.dump.computer": "コンピューター",
--- a/projects/common/src/main/resources/assets/computercraft/lang/ko_kr.json
+++ b/projects/common/src/main/resources/assets/computercraft/lang/ko_kr.json
@@ -47,8 +47,6 @@
    "commands.computercraft.synopsis": "컴퓨터를 제어하기 위한 다양한 명령어",
    "commands.computercraft.tp.action": "이 컴퓨터로 순간이동하기",
    "commands.computercraft.tp.desc": "컴퓨터의 위치로 순간이동합니다. 컴퓨터의 인스턴스 ID(예: 123) 또는 컴퓨터 ID(예: #123)를 지정할 수 있습니다.",
-    "commands.computercraft.tp.not_player": "비플레이어용 터미널을 열 수 없습니다.",
-    "commands.computercraft.tp.not_there": "월드에서 컴퓨터를 위치시킬 수 없습니다.",
    "commands.computercraft.tp.synopsis": "특정 컴퓨터로 순간이동하기",
    "commands.computercraft.track.desc": "컴퓨터가 실행되는 기간과 처리되는 이벤트 수를 추적합니다. 이는 /forge 트랙과 유사한 방법으로 정보를 제공하며 지연 로그에 유용할 수 있습니다.",
    "commands.computercraft.track.dump.computer": "컴퓨터",
--- a/projects/common/src/main/resources/assets/computercraft/lang/nb_no.json
+++ b/projects/common/src/main/resources/assets/computercraft/lang/nb_no.json
@@ -47,8 +47,6 @@
    "commands.computercraft.synopsis": "Forskjellige kommandoer for å kontrollere datamaskiner.",
    "commands.computercraft.tp.action": "Teleporter til denne datamaskinen",
    "commands.computercraft.tp.desc": "Teleporter til en datamaskin sin posisjon. Du kan enten spesifisere datamaskinens forekomst id (f. eks 123) eller datamaskinens id (f. eks #123).",
-    "commands.computercraft.tp.not_player": "Kan kun åpne terminalen for spillere",
-    "commands.computercraft.tp.not_there": "Greide ikke å finne datamaskinen i denne verdenen",
    "commands.computercraft.tp.synopsis": "Teleporter til en spesifikk datamaskin.",
    "commands.computercraft.track.desc": "Spor hvor lenge datamaskiner kjører, samt hvor mange hendelser de handler. Dette presenterer informasjon i en lignende vei til /forge track og kan være nyttig for å diagnostisere lagg.",
    "commands.computercraft.track.dump.computer": "Datamaskin",
--- a/projects/common/src/main/resources/assets/computercraft/lang/nl_nl.json
+++ b/projects/common/src/main/resources/assets/computercraft/lang/nl_nl.json
@@ -47,8 +47,6 @@
    "commands.computercraft.synopsis": "Verschillende commando's voor het beheren van computers.",
    "commands.computercraft.tp.action": "Teleporteer naar deze computer",
    "commands.computercraft.tp.desc": "Teleporteer naar de locatie van een specefieke computer. Je kunt een instance-id (bijv. 123) of computer-id (bijv. #123) opgeven.",
-    "commands.computercraft.tp.not_player": "Kan geen terminal openen voor non-speler",
-    "commands.computercraft.tp.not_there": "Kan de computer niet lokaliseren",
    "commands.computercraft.tp.synopsis": "Teleporteer naar een specifieke computer.",
    "commands.computercraft.track.desc": "Houd uitvoertijd en het aantal behandelde events van computers bij. Dit biedt informatie op een gelijke manier als /forge track en kan nuttig zijn in het opsloren van lag.",
    "commands.computercraft.track.dump.computer": "Computer",
--- a/projects/common/src/main/resources/assets/computercraft/lang/pl_pl.json
+++ b/projects/common/src/main/resources/assets/computercraft/lang/pl_pl.json
@@ -31,7 +31,6 @@
    "commands.computercraft.synopsis": "Różne komendy do kontrolowania komputerami.",
    "commands.computercraft.tp.action": "Przeteleportuj się do podanego komputera",
    "commands.computercraft.tp.desc": "Przeteleportuj się do lokalizacji komputera. Możesz wybrać numer sesji komputera (np. 123) lub ID komputera (np. #123).",
-    "commands.computercraft.tp.not_there": "Nie można zlokalizować komputera w świecie",
    "commands.computercraft.tp.synopsis": "Przeteleportuj się do podanego komputera.",
    "commands.computercraft.track.dump.computer": "Komputer",
    "commands.computercraft.turn_on.desc": "Włącz podane komputery. Możesz wybrać numer sesji komputera (np. 123), ID komputera (np. #123) lub jego etykietę (np. \"@Mój Komputer\").",
--- a/projects/common/src/main/resources/assets/computercraft/lang/ru_ru.json
+++ b/projects/common/src/main/resources/assets/computercraft/lang/ru_ru.json
@@ -47,8 +47,6 @@
    "commands.computercraft.synopsis": "Различные команды для управления компьютерами.",
    "commands.computercraft.tp.action": "Телепортироваться к этому компьютеру",
    "commands.computercraft.tp.desc": "Телепортироваться к местоположению компьютера. Ты можешь указать либо идентификатор экземпляра компьютера (например 123) либо идентификатор компьютера (например #123).",
-    "commands.computercraft.tp.not_player": "Нельзя открыть терминал для не-игрока",
-    "commands.computercraft.tp.not_there": "Нельзя определить в мире местоположение компьютер",
    "commands.computercraft.tp.synopsis": "Телепортироваться к конкретному компьютеру.",
    "commands.computercraft.track.desc": "Отслеживает, как долго компьютеры исполняют, а также то, как много они обрабатывают события. Эта информация представляется аналогично к /forge track и может быть полезной для диагностики лага.",
    "commands.computercraft.track.dump.computer": "Компьютер",
--- a/projects/common/src/main/resources/assets/computercraft/lang/sv_se.json
+++ b/projects/common/src/main/resources/assets/computercraft/lang/sv_se.json
@@ -47,8 +47,6 @@
    "commands.computercraft.synopsis": "Olika kommandon för att kontrollera datorer.",
    "commands.computercraft.tp.action": "Teleportera till den här datorn",
    "commands.computercraft.tp.desc": "Teleportera till datorns position. Du kan ange en dators instans-id (t.ex. 123), dator-id (t.ex. #123) eller etikett (t.ex. \"@Min dator\").",
-    "commands.computercraft.tp.not_player": "Kan inte öppna terminalen för en ickespelare",
-    "commands.computercraft.tp.not_there": "Kan inte hitta datorn i världen",
    "commands.computercraft.tp.synopsis": "Teleportera till en specifik dator.",
    "commands.computercraft.track.desc": "Spåra hur länge datorer exekverar, och även hur många event de hanterar. Detta presenterar information på liknande sätt som /forge track och kan vara användbart för att undersöka lagg.",
    "commands.computercraft.track.dump.computer": "Dator",
--- a/projects/common/src/main/resources/assets/computercraft/lang/tok.json
+++ b/projects/common/src/main/resources/assets/computercraft/lang/tok.json
@@ -44,8 +44,6 @@
    "commands.computercraft.synopsis": "mi jo e toki wawa ante tawa ni: sina lawa e ilo sona.",
    "commands.computercraft.tp.action": "o tawa pi ilo sona",
    "commands.computercraft.tp.desc": "o tawa ilo sona. ilo sona la, sina ken pana e nanpa pi ijo (sama 123) anu nanpa (sama #123).",
-    "commands.computercraft.tp.not_player": "jan ala la, mi ken ala open e sitelen pi ilo sona",
-    "commands.computercraft.tp.not_there": "mi ken ala alasa e ilo sona pi lon ma",
    "commands.computercraft.tp.synopsis": "mi tawa pi ilo sona e sina.",
    "commands.computercraft.track.desc": "ilo sona la, mi sitelen e tenpo pali e mute toki. toki wawa /forge track la, mi pana pi nasin sama e sona. mi pona tawa alasa pi tenpo ike.",
    "commands.computercraft.track.dump.computer": "ilo sona",
--- a/projects/common/src/main/resources/assets/computercraft/lang/uk_ua.json
+++ b/projects/common/src/main/resources/assets/computercraft/lang/uk_ua.json
@@ -47,8 +47,6 @@
    "commands.computercraft.synopsis": "Різні команди для керування комп'ютерами.",
    "commands.computercraft.tp.action": "Телепортувати до цього комп'ютера",
    "commands.computercraft.tp.desc": "Телепортувати до розташування комп'ютера. Ви можете вказати або ідентифікатор екземпляра комп'ютера (наприклад, 123) або ідентифікатор комп'ютера (наприклад, #123).",
-    "commands.computercraft.tp.not_player": "Не можна відкрити термінал для не-гравця",
-    "commands.computercraft.tp.not_there": "Не можна визначити у світі розташування комп'ютер",
    "commands.computercraft.tp.synopsis": "Телепортувати до конкретного комп'ютера.",
    "commands.computercraft.track.desc": "Відстежує, як довго комп'ютери виконують, а також те, як багато вони обробляють події. Ця інформація представляється аналогічно /forge track і може бути корисною для діагностики лага.",
    "commands.computercraft.track.dump.computer": "Комп'ютер",
--- a/projects/common/src/main/resources/assets/computercraft/lang/zh_cn.json
+++ b/projects/common/src/main/resources/assets/computercraft/lang/zh_cn.json
@@ -45,8 +45,6 @@
    "commands.computercraft.synopsis": "各种控制计算机的命令.",
    "commands.computercraft.tp.action": "传送到这台电脑",
    "commands.computercraft.tp.desc": "传送到计算机的位置. 你可以指定计算机的实例id (例如. 123)或计算机id (例如. #123).",
-    "commands.computercraft.tp.not_player": "无法为非玩家打开终端",
-    "commands.computercraft.tp.not_there": "无法在世界上定位电脑",
    "commands.computercraft.tp.synopsis": "传送到特定的计算机.",
    "commands.computercraft.track.desc": "跟踪计算机执行的时间以及它们处理的事件数. 这以/forge track类似的方式呈现信息，可用于诊断滞后.",
    "commands.computercraft.track.dump.computer": "计算机",
--- a/projects/common/src/test/java/dan200/computercraft/impl/network/wired/NetworkTest.java
+++ b/projects/common/src/test/java/dan200/computercraft/impl/network/wired/NetworkTest.java
@@ -353,7 +353,7 @@ public class NetworkTest {
        }
    }

-    private static class NetworkPeripheral implements IPeripheral {
+    private static final class NetworkPeripheral implements IPeripheral {
        @Override
        public String getType() {
            return "test";
--- a/projects/common/src/test/java/dan200/computercraft/shared/recipe/RecipeArbitraries.java
+++ b/projects/common/src/test/java/dan200/computercraft/shared/recipe/RecipeArbitraries.java
@@ -0,0 +1,50 @@
+// SPDX-FileCopyrightText: 2023 The CC: Tweaked Developers
+//
+// SPDX-License-Identifier: MPL-2.0
+
+package dan200.computercraft.shared.recipe;
+
+import dan200.computercraft.test.shared.MinecraftArbitraries;
+import it.unimi.dsi.fastutil.ints.IntIntImmutablePair;
+import net.jqwik.api.Arbitraries;
+import net.jqwik.api.Arbitrary;
+import net.jqwik.api.Combinators;
+import net.minecraft.core.NonNullList;
+import net.minecraft.world.item.crafting.CraftingBookCategory;
+import net.minecraft.world.item.crafting.Ingredient;
+
+/**
+ * {@link Arbitrary} implementations for recipes.
+ */
+public final class RecipeArbitraries {
+    public static Arbitrary<RecipeProperties> recipeProperties() {
+        return Combinators.combine(
+            Arbitraries.strings().ofMinLength(1).withChars("abcdefghijklmnopqrstuvwxyz_"),
+            Arbitraries.of(CraftingBookCategory.values())
+        ).as(RecipeProperties::new);
+    }
+
+    public static Arbitrary<ShapelessRecipeSpec> shapelessRecipeSpec() {
+        return Combinators.combine(
+            recipeProperties(),
+            MinecraftArbitraries.ingredient().array(Ingredient[].class).ofMinSize(1).map(x -> NonNullList.of(Ingredient.EMPTY, x)),
+            MinecraftArbitraries.nonEmptyItemStack()
+        ).as(ShapelessRecipeSpec::new);
+    }
+
+    public static Arbitrary<ShapedTemplate> shapedTemplate() {
+        return Combinators.combine(Arbitraries.integers().between(1, 3), Arbitraries.integers().between(1, 3))
+            .as(IntIntImmutablePair::new)
+            .flatMap(x -> MinecraftArbitraries.ingredient().array(Ingredient[].class).ofSize(x.leftInt() * x.rightInt())
+                .map(i -> new ShapedTemplate(x.leftInt(), x.rightInt(), NonNullList.of(Ingredient.EMPTY, i)))
+            );
+    }
+
+    public static Arbitrary<ShapedRecipeSpec> shapedRecipeSpec() {
+        return Combinators.combine(
+            recipeProperties(),
+            shapedTemplate(),
+            MinecraftArbitraries.nonEmptyItemStack()
+        ).as(ShapedRecipeSpec::new);
+    }
+}
--- a/projects/common/src/test/java/dan200/computercraft/shared/recipe/RecipeEqualities.java
+++ b/projects/common/src/test/java/dan200/computercraft/shared/recipe/RecipeEqualities.java
@@ -0,0 +1,34 @@
+// SPDX-FileCopyrightText: 2023 The CC: Tweaked Developers
+//
+// SPDX-License-Identifier: MPL-2.0
+
+package dan200.computercraft.shared.recipe;
+
+import dan200.computercraft.test.core.StructuralEquality;
+import dan200.computercraft.test.shared.MinecraftEqualities;
+
+/**
+ * {@link StructuralEquality} implementations for recipes.
+ */
+public final class RecipeEqualities {
+    private RecipeEqualities() {
+    }
+
+    public static final StructuralEquality<ShapelessRecipeSpec> shapelessRecipeSpec = StructuralEquality.all(
+        StructuralEquality.at("properties", ShapelessRecipeSpec::properties),
+        StructuralEquality.at("ingredients", ShapelessRecipeSpec::ingredients, MinecraftEqualities.ingredient.list()),
+        StructuralEquality.at("result", ShapelessRecipeSpec::result, MinecraftEqualities.itemStack)
+    );
+
+    public static final StructuralEquality<ShapedTemplate> shapedTemplate = StructuralEquality.all(
+        StructuralEquality.at("width", ShapedTemplate::width),
+        StructuralEquality.at("height", ShapedTemplate::height),
+        StructuralEquality.at("ingredients", ShapedTemplate::ingredients, MinecraftEqualities.ingredient.list())
+    );
+
+    public static final StructuralEquality<ShapedRecipeSpec> shapedRecipeSpec = StructuralEquality.all(
+        StructuralEquality.at("properties", ShapedRecipeSpec::properties),
+        StructuralEquality.at("ingredients", ShapedRecipeSpec::template, shapedTemplate),
+        StructuralEquality.at("result", ShapedRecipeSpec::result, MinecraftEqualities.itemStack)
+    );
+}
--- a/projects/common/src/test/java/dan200/computercraft/shared/recipe/ShapedRecipeSpecTest.java
+++ b/projects/common/src/test/java/dan200/computercraft/shared/recipe/ShapedRecipeSpecTest.java
@@ -0,0 +1,32 @@
+// SPDX-FileCopyrightText: 2023 The CC: Tweaked Developers
+//
+// SPDX-License-Identifier: MPL-2.0
+
+package dan200.computercraft.shared.recipe;
+
+import dan200.computercraft.test.shared.NetworkSupport;
+import dan200.computercraft.test.shared.WithMinecraft;
+import net.jqwik.api.Arbitrary;
+import net.jqwik.api.ForAll;
+import net.jqwik.api.Property;
+import net.jqwik.api.Provide;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+
+@WithMinecraft
+public class ShapedRecipeSpecTest {
+    static {
+        WithMinecraft.Setup.bootstrap(); // @Property doesn't run test lifecycle methods.
+    }
+
+    @Property
+    public void testRoundTrip(@ForAll("recipe") ShapedRecipeSpec spec) {
+        var converted = NetworkSupport.roundTrip(spec, ShapedRecipeSpec::toNetwork, ShapedRecipeSpec::fromNetwork);
+        assertThat("Recipes are equal", converted, RecipeEqualities.shapedRecipeSpec.asMatcher(ShapedRecipeSpec.class, spec));
+    }
+
+    @Provide
+    Arbitrary<ShapedRecipeSpec> recipe() {
+        return RecipeArbitraries.shapedRecipeSpec();
+    }
+}
--- a/projects/common/src/test/java/dan200/computercraft/shared/recipe/ShapelessRecipeSpecTest.java
+++ b/projects/common/src/test/java/dan200/computercraft/shared/recipe/ShapelessRecipeSpecTest.java
@@ -0,0 +1,32 @@
+// SPDX-FileCopyrightText: 2023 The CC: Tweaked Developers
+//
+// SPDX-License-Identifier: MPL-2.0
+
+package dan200.computercraft.shared.recipe;
+
+import dan200.computercraft.test.shared.NetworkSupport;
+import dan200.computercraft.test.shared.WithMinecraft;
+import net.jqwik.api.Arbitrary;
+import net.jqwik.api.ForAll;
+import net.jqwik.api.Property;
+import net.jqwik.api.Provide;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+
+@WithMinecraft
+public class ShapelessRecipeSpecTest {
+    static {
+        WithMinecraft.Setup.bootstrap(); // @Property doesn't run test lifecycle methods.
+    }
+
+    @Property
+    public void testRoundTrip(@ForAll("recipe") ShapelessRecipeSpec spec) {
+        var converted = NetworkSupport.roundTrip(spec, ShapelessRecipeSpec::toNetwork, ShapelessRecipeSpec::fromNetwork);
+        assertThat("Recipes are equal", converted, RecipeEqualities.shapelessRecipeSpec.asMatcher(ShapelessRecipeSpec.class, spec));
+    }
+
+    @Provide
+    Arbitrary<ShapelessRecipeSpec> recipe() {
+        return RecipeArbitraries.shapelessRecipeSpec();
+    }
+}
--- a/projects/common/src/test/java/dan200/computercraft/shared/turtle/upgrades/TurtleToolSerialiserTest.java
+++ b/projects/common/src/test/java/dan200/computercraft/shared/turtle/upgrades/TurtleToolSerialiserTest.java
@@ -8,16 +8,13 @@ import dan200.computercraft.api.turtle.ITurtleUpgrade;
 import dan200.computercraft.api.turtle.TurtleToolDurability;
 import dan200.computercraft.test.core.StructuralEquality;
 import dan200.computercraft.test.shared.MinecraftArbitraries;
+import dan200.computercraft.test.shared.MinecraftEqualities;
+import dan200.computercraft.test.shared.NetworkSupport;
 import dan200.computercraft.test.shared.WithMinecraft;
-import io.netty.buffer.Unpooled;
 import net.jqwik.api.*;
 import net.minecraft.core.registries.Registries;
-import net.minecraft.network.FriendlyByteBuf;
-import net.minecraft.world.item.ItemStack;
-import org.hamcrest.Description;

 import static org.hamcrest.MatcherAssert.assertThat;
-import static org.junit.jupiter.api.Assertions.assertEquals;

@WithMinecraft
 class TurtleToolSerialiserTest {
@@ -32,11 +29,9 @@ class TurtleToolSerialiserTest {
     */
    @Property
    public void testRoundTrip(@ForAll("tool") TurtleTool tool) {
-        var buffer = new FriendlyByteBuf(Unpooled.directBuffer());
-        TurtleToolSerialiser.INSTANCE.toNetwork(buffer, tool);
-
-        var converted = TurtleToolSerialiser.INSTANCE.fromNetwork(tool.getUpgradeID(), buffer);
-        assertEquals(buffer.readableBytes(), 0, "Whole packet was read");
+        var converted = NetworkSupport.roundTripSerialiser(
+            tool.getUpgradeID(), tool, TurtleToolSerialiser.INSTANCE::toNetwork, TurtleToolSerialiser.INSTANCE::fromNetwork
+        );

        if (!equality.equals(tool, converted)) {
            System.out.println("Break");
@@ -58,22 +53,10 @@ class TurtleToolSerialiserTest {
        ).as(TurtleTool::new);
    }

-    private static final StructuralEquality<ItemStack> stackEquality = new StructuralEquality<>() {
-        @Override
-        public boolean equals(ItemStack left, ItemStack right) {
-            return ItemStack.isSameItemSameTags(left, right) && left.getCount() == right.getCount();
-        }
-
-        @Override
-        public void describe(Description description, ItemStack object) {
-            description.appendValue(object).appendValue(object.getTag());
-        }
-    };
-
    private static final StructuralEquality<TurtleTool> equality = StructuralEquality.all(
        StructuralEquality.at("id", ITurtleUpgrade::getUpgradeID),
-        StructuralEquality.at("craftingItem", ITurtleUpgrade::getCraftingItem, stackEquality),
-        StructuralEquality.at("tool", x -> x.item, stackEquality),
+        StructuralEquality.at("craftingItem", ITurtleUpgrade::getCraftingItem, MinecraftEqualities.itemStack),
+        StructuralEquality.at("tool", x -> x.item, MinecraftEqualities.itemStack),
        StructuralEquality.at("damageMulitiplier", x -> x.damageMulitiplier),
        StructuralEquality.at("allowEnchantments", x -> x.allowEnchantments),
        StructuralEquality.at("consumeDurability", x -> x.consumeDurability),
--- a/projects/common/src/testFixtures/java/dan200/computercraft/test/shared/MinecraftArbitraries.java
+++ b/projects/common/src/testFixtures/java/dan200/computercraft/test/shared/MinecraftArbitraries.java
@@ -17,6 +17,7 @@ import net.minecraft.tags.TagKey;
 import net.minecraft.world.item.Item;
 import net.minecraft.world.item.ItemStack;
 import net.minecraft.world.item.Items;
+import net.minecraft.world.item.crafting.Ingredient;

 import java.util.List;

@@ -44,6 +45,10 @@ public final class MinecraftArbitraries {
        return Arbitraries.oneOf(List.of(Arbitraries.just(ItemStack.EMPTY), nonEmptyItemStack()));
    }

+    public static Arbitrary<Ingredient> ingredient() {
+        return nonEmptyItemStack().list().ofMinSize(1).map(x -> Ingredient.of(x.stream()));
+    }
+
    public static Arbitrary<BlockPos> blockPos() {
        // BlockPos has a maximum range that can be sent over the network - use those.
        var xz = Arbitraries.integers().between(-3_000_000, -3_000_000);
--- a/projects/common/src/testFixtures/java/dan200/computercraft/test/shared/MinecraftEqualities.java
+++ b/projects/common/src/testFixtures/java/dan200/computercraft/test/shared/MinecraftEqualities.java
@@ -0,0 +1,39 @@
+// SPDX-FileCopyrightText: 2023 The CC: Tweaked Developers
+//
+// SPDX-License-Identifier: MPL-2.0
+
+package dan200.computercraft.test.shared;
+
+import dan200.computercraft.test.core.StructuralEquality;
+import net.minecraft.world.item.ItemStack;
+import net.minecraft.world.item.crafting.Ingredient;
+import org.hamcrest.Description;
+
+/**
+ * {@link StructuralEquality} implementations for Minecraft types.
+ */
+public class MinecraftEqualities {
+    public static final StructuralEquality<ItemStack> itemStack = new StructuralEquality<>() {
+        @Override
+        public boolean equals(ItemStack left, ItemStack right) {
+            return ItemStack.isSameItemSameTags(left, right) && left.getCount() == right.getCount();
+        }
+
+        @Override
+        public void describe(Description description, ItemStack object) {
+            description.appendValue(object).appendValue(object.getTag());
+        }
+    };
+
+    public static final StructuralEquality<Ingredient> ingredient = new StructuralEquality<>() {
+        @Override
+        public boolean equals(Ingredient left, Ingredient right) {
+            return left.toJson().equals(right.toJson());
+        }
+
+        @Override
+        public void describe(Description description, Ingredient object) {
+            description.appendValue(object.toJson());
+        }
+    };
+}
--- a/projects/common/src/testFixtures/java/dan200/computercraft/test/shared/NetworkSupport.java
+++ b/projects/common/src/testFixtures/java/dan200/computercraft/test/shared/NetworkSupport.java
@@ -0,0 +1,56 @@
+// SPDX-FileCopyrightText: 2023 The CC: Tweaked Developers
+//
+// SPDX-License-Identifier: MPL-2.0
+
+package dan200.computercraft.test.shared;
+
+import io.netty.buffer.Unpooled;
+import net.minecraft.network.FriendlyByteBuf;
+import net.minecraft.resources.ResourceLocation;
+import net.minecraft.world.item.crafting.RecipeSerializer;
+
+import java.util.function.BiConsumer;
+import java.util.function.BiFunction;
+import java.util.function.Function;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+/**
+ * Support methods for working with Minecraft's networking code.
+ */
+public final class NetworkSupport {
+    private NetworkSupport() {
+    }
+
+    /**
+     * Attempt to serialise and then deserialise a value.
+     *
+     * @param value The value to serialise.
+     * @param write Serialise this value to a buffer.
+     * @param read  Deserialise this value from a buffer.
+     * @param <T>   The type of the value to round trip.
+     * @return The converted value, for checking equivalency.
+     */
+    public static <T> T roundTrip(T value, BiConsumer<T, FriendlyByteBuf> write, Function<FriendlyByteBuf, T> read) {
+        var buffer = new FriendlyByteBuf(Unpooled.directBuffer());
+        write.accept(value, buffer);
+
+        var converted = read.apply(buffer);
+        assertEquals(buffer.readableBytes(), 0, "Whole packet was read");
+        return converted;
+    }
+
+    /**
+     * Attempt to serialise and then deserialise a value from a {@link RecipeSerializer}-like interface.
+     *
+     * @param id    The id of this value.
+     * @param value The value to serialise.
+     * @param write Serialise this value to a buffer.
+     * @param read  Deserialise this value from a buffer.
+     * @param <T>   The type of the value to round trip.
+     * @return The converted value, for checking equivalency.
+     */
+    public static <T> T roundTripSerialiser(ResourceLocation id, T value, BiConsumer<FriendlyByteBuf, T> write, BiFunction<ResourceLocation, FriendlyByteBuf, T> read) {
+        return roundTrip(value, (x, b) -> write.accept(b, x), b -> read.apply(id, b));
+    }
+}
--- a/projects/common/src/testMod/kotlin/dan200/computercraft/gametest/Recipe_Test.kt
+++ b/projects/common/src/testMod/kotlin/dan200/computercraft/gametest/Recipe_Test.kt
@@ -4,6 +4,7 @@

 package dan200.computercraft.gametest

+import com.mojang.authlib.GameProfile
 import dan200.computercraft.gametest.api.Structures
 import dan200.computercraft.gametest.api.sequence
 import dan200.computercraft.shared.ModRegistry
@@ -11,6 +12,7 @@ import net.minecraft.gametest.framework.GameTest
 import net.minecraft.gametest.framework.GameTestAssertException
 import net.minecraft.gametest.framework.GameTestHelper
 import net.minecraft.nbt.CompoundTag
+import net.minecraft.nbt.NbtUtils
 import net.minecraft.world.entity.player.Player
 import net.minecraft.world.inventory.AbstractContainerMenu
 import net.minecraft.world.inventory.MenuType
@@ -41,11 +43,10 @@ class Recipe_Test {

            val result = recipe.get().assemble(container, context.level.registryAccess())

-            val owner = CompoundTag()
-            owner.putString("Name", "dan200")
-            owner.putString("Id", "f3c8d69b-0776-4512-8434-d1b2165909eb")
+            val profile = GameProfile(UUID.fromString("f3c8d69b-0776-4512-8434-d1b2165909eb"), "dan200")
+
            val tag = CompoundTag()
-            tag.put("SkullOwner", owner)
+            tag.put("SkullOwner", NbtUtils.writeGameProfile(CompoundTag(), profile))

            assertEquals(tag, result.tag, "Expected NBT tags to be the same")
        }
--- a/projects/core-api/build.gradle.kts
+++ b/projects/core-api/build.gradle.kts
@@ -18,9 +18,7 @@ val docApi by configurations.registering {
 }

 dependencies {
-    compileOnlyApi(libs.jsr305)
-    compileOnlyApi(libs.checkerFramework)
-    compileOnlyApi(libs.jetbrainsAnnotations)
+    compileOnlyApi(libs.bundles.annotations)

    "docApi"(project(":common-api"))
 }
--- a/projects/core-api/src/main/java/dan200/computercraft/api/filesystem/FileAttributes.java
+++ b/projects/core-api/src/main/java/dan200/computercraft/api/filesystem/FileAttributes.java
@@ -12,25 +12,30 @@ import java.time.Instant;
 /**
 * A simple version of {@link BasicFileAttributes}, which provides what information a {@link Mount} already exposes.
 *
- * @param isDirectory Whether this filesystem entry is a directory.
- * @param size        The size of the file.
+ * @param isDirectory      Whether this filesystem entry is a directory.
+ * @param size             The size of the file.
+ * @param creationTime     The time the file was created.
+ * @param lastModifiedTime The time the file was last modified.
 */
-public record FileAttributes(boolean isDirectory, long size) implements BasicFileAttributes {
+public record FileAttributes(
+    boolean isDirectory, long size, FileTime creationTime, FileTime lastModifiedTime
+) implements BasicFileAttributes {
    private static final FileTime EPOCH = FileTime.from(Instant.EPOCH);

-    @Override
-    public FileTime lastModifiedTime() {
-        return EPOCH;
+    /**
+     * Create a new {@link FileAttributes} instance with the {@linkplain #creationTime() creation time} and
+     * {@linkplain #lastModifiedTime() last modified time} set to the Unix epoch.
+     *
+     * @param isDirectory Whether the filesystem entry is a directory.
+     * @param size        The size of the file.
+     */
+    public FileAttributes(boolean isDirectory, long size) {
+        this(isDirectory, size, EPOCH, EPOCH);
    }

    @Override
    public FileTime lastAccessTime() {
-        return EPOCH;
-    }
-
-    @Override
-    public FileTime creationTime() {
-        return EPOCH;
+        return lastModifiedTime();
    }

    @Override
--- a/projects/core/src/main/java/dan200/computercraft/core/apis/FSAPI.java
+++ b/projects/core/src/main/java/dan200/computercraft/core/apis/FSAPI.java
@@ -17,7 +17,6 @@ import dan200.computercraft.core.filesystem.FileSystemException;
 import dan200.computercraft.core.metrics.Metrics;

 import javax.annotation.Nullable;
-import java.nio.file.attribute.FileTime;
 import java.util.HashMap;
 import java.util.Map;
 import java.util.function.Function;
@@ -488,9 +487,9 @@ public class FSAPI implements ILuaAPI {
        try (var ignored = environment.time(Metrics.FS_OPS)) {
            var attributes = getFileSystem().getAttributes(path);
            Map<String, Object> result = new HashMap<>();
-            result.put("modification", getFileTime(attributes.lastModifiedTime()));
-            result.put("modified", getFileTime(attributes.lastModifiedTime()));
-            result.put("created", getFileTime(attributes.creationTime()));
+            result.put("modification", attributes.lastModifiedTime().toMillis());
+            result.put("modified", attributes.lastModifiedTime().toMillis());
+            result.put("created", attributes.creationTime().toMillis());
            result.put("size", attributes.isDirectory() ? 0 : attributes.size());
            result.put("isDir", attributes.isDirectory());
            result.put("isReadOnly", getFileSystem().isReadOnly(path));
@@ -499,8 +498,4 @@ public class FSAPI implements ILuaAPI {
            throw new LuaException(e.getMessage());
        }
    }
-
-    private static long getFileTime(@Nullable FileTime time) {
-        return time == null ? 0 : time.toMillis();
-    }
 }
--- a/projects/core/src/main/java/dan200/computercraft/core/apis/HTTPAPI.java
+++ b/projects/core/src/main/java/dan200/computercraft/core/apis/HTTPAPI.java
@@ -12,6 +12,7 @@ import dan200.computercraft.core.CoreConfig;
 import dan200.computercraft.core.apis.http.*;
 import dan200.computercraft.core.apis.http.request.HttpRequest;
 import dan200.computercraft.core.apis.http.websocket.Websocket;
+import dan200.computercraft.core.apis.http.websocket.WebsocketClient;
 import io.netty.handler.codec.http.DefaultHttpHeaders;
 import io.netty.handler.codec.http.HttpHeaderNames;
 import io.netty.handler.codec.http.HttpHeaders;
@@ -165,7 +166,7 @@ public class HTTPAPI implements ILuaAPI {
        var timeout = getTimeout(timeoutArg);

        try {
-            var uri = Websocket.checkUri(address);
+            var uri = WebsocketClient.parseUri(address);
            if (!new Websocket(websockets, apiEnvironment, uri, address, headers, timeout).queue(Websocket::connect)) {
                throw new LuaException("Too many websockets already open");
            }
--- a/projects/core/src/main/java/dan200/computercraft/core/apis/RedstoneAPI.java
+++ b/projects/core/src/main/java/dan200/computercraft/core/apis/RedstoneAPI.java
@@ -49,7 +49,7 @@ import java.util.List;
 * end
 * }</pre>
 * <p>
- * [comparator]: https://minecraft.gamepedia.com/Redstone_Comparator#Subtract_signal_strength "Redstone Comparator on
+ * [comparator]: https://minecraft.wiki/w/Redstone_Comparator#Subtract_signal_strength "Redstone Comparator on
 * the Minecraft wiki."
 * @cc.module redstone
 */
--- a/projects/core/src/main/java/dan200/computercraft/core/apis/handles/BinaryReadableHandle.java
+++ b/projects/core/src/main/java/dan200/computercraft/core/apis/handles/BinaryReadableHandle.java
@@ -77,12 +77,10 @@ public class BinaryReadableHandle extends HandleGeneric {
                    var buffer = ByteBuffer.allocate(BUFFER_SIZE);
                    var read = channel.read(buffer);
                    if (read < 0) return null;
+                    buffer.flip();

                    // If we failed to read "enough" here, let's just abort
-                    if (read >= count || read < BUFFER_SIZE) {
-                        buffer.flip();
-                        return new Object[]{ buffer };
-                    }
+                    if (read >= count || read < BUFFER_SIZE) return new Object[]{ buffer };

                    // Build up an array of ByteBuffers. Hopefully this means we can perform less allocation
                    // than doubling up the buffer each time.
@@ -90,11 +88,13 @@ public class BinaryReadableHandle extends HandleGeneric {
                    List<ByteBuffer> parts = new ArrayList<>(4);
                    parts.add(buffer);
                    while (read >= BUFFER_SIZE && totalRead < count) {
-                        buffer = ByteBuffer.allocate(Math.min(BUFFER_SIZE, count - totalRead));
+                        buffer = ByteBuffer.allocateDirect(Math.min(BUFFER_SIZE, count - totalRead));
                        read = channel.read(buffer);
                        if (read < 0) break;
+                        buffer.flip();

                        totalRead += read;
+                        assert read == buffer.remaining();
                        parts.add(buffer);
                    }

@@ -102,9 +102,11 @@ public class BinaryReadableHandle extends HandleGeneric {
                    var bytes = new byte[totalRead];
                    var pos = 0;
                    for (var part : parts) {
-                        System.arraycopy(part.array(), 0, bytes, pos, part.position());
-                        pos += part.position();
+                        int length = part.remaining();
+                        part.get(bytes, pos, length);
+                        pos += length;
                    }
+                    assert pos == totalRead;
                    return new Object[]{ bytes };
                }
            } else {
--- a/projects/core/src/main/java/dan200/computercraft/core/apis/http/NetworkUtils.java
+++ b/projects/core/src/main/java/dan200/computercraft/core/apis/http/NetworkUtils.java
@@ -134,7 +134,7 @@ public final class NetworkUtils {
     */
    public static Options getOptions(String host, InetSocketAddress address) throws HTTPRequestException {
        var options = AddressRule.apply(CoreConfig.httpRules, host, address);
-        if (options.action == Action.DENY) throw new HTTPRequestException("Domain not permitted");
+        if (options.action() == Action.DENY) throw new HTTPRequestException("Domain not permitted");
        return options;
    }

@@ -150,7 +150,7 @@ public final class NetworkUtils {
     * @throws HTTPRequestException If a proxy is required but not configured correctly.
     */
    public static @Nullable Consumer<SocketChannel> getProxyHandler(Options options, int timeout) throws HTTPRequestException {
-        if (!options.useProxy) return null;
+        if (!options.useProxy()) return null;

        var type = CoreConfig.httpProxyType;
        var host = CoreConfig.httpProxyHost;
--- a/projects/core/src/main/java/dan200/computercraft/core/apis/http/options/Options.java
+++ b/projects/core/src/main/java/dan200/computercraft/core/apis/http/options/Options.java
@@ -6,20 +6,13 @@ package dan200.computercraft.core.apis.http.options;


 /**
- * Options about a specific domain.
+ * Options for a given HTTP request or websocket, which control its resource constraints.
+ *
+ * @param action           Whether to {@link Action#ALLOW} or {@link Action#DENY} this request.
+ * @param maxUpload        The maximum size of the HTTP request.
+ * @param maxDownload      The maximum size of the HTTP response.
+ * @param websocketMessage The maximum size of a websocket message (outgoing and incoming).
+ * @param useProxy         Whether to use the configured proxy.
 */
-public final class Options {
-    public final Action action;
-    public final long maxUpload;
-    public final long maxDownload;
-    public final int websocketMessage;
-    public final boolean useProxy;
-
-    Options(Action action, long maxUpload, long maxDownload, int websocketMessage, boolean useProxy) {
-        this.action = action;
-        this.maxUpload = maxUpload;
-        this.maxDownload = maxDownload;
-        this.websocketMessage = websocketMessage;
-        this.useProxy = useProxy;
-    }
+public record Options(Action action, long maxUpload, long maxDownload, int websocketMessage, boolean useProxy) {
 }
--- a/projects/core/src/main/java/dan200/computercraft/core/apis/http/options/PartialOptions.java
+++ b/projects/core/src/main/java/dan200/computercraft/core/apis/http/options/PartialOptions.java
@@ -34,7 +34,7 @@ public final class PartialOptions {
        this.useProxy = useProxy;
    }

-    Options toOptions() {
+    public Options toOptions() {
        if (options != null) return options;

        return options = new Options(
--- a/projects/core/src/main/java/dan200/computercraft/core/apis/http/request/HttpRequest.java
+++ b/projects/core/src/main/java/dan200/computercraft/core/apis/http/request/HttpRequest.java
@@ -130,7 +130,7 @@ public class HttpRequest extends Resource<HttpRequest> {
            if (isClosed()) return;

            var requestBody = getHeaderSize(headers) + postBuffer.capacity();
-            if (options.maxUpload != 0 && requestBody > options.maxUpload) {
+            if (options.maxUpload() != 0 && requestBody > options.maxUpload()) {
                failure("Request body is too large");
                return;
            }
--- a/projects/core/src/main/java/dan200/computercraft/core/apis/http/request/HttpRequestHandler.java
+++ b/projects/core/src/main/java/dan200/computercraft/core/apis/http/request/HttpRequestHandler.java
@@ -136,7 +136,7 @@ public final class HttpRequestHandler extends SimpleChannelInboundHandler<HttpOb
            var partial = content.content();
            if (partial.isReadable()) {
                // If we've read more than we're allowed to handle, abort as soon as possible.
-                if (options.maxDownload != 0 && responseBody.readableBytes() + partial.readableBytes() > options.maxDownload) {
+                if (options.maxDownload() != 0 && responseBody.readableBytes() + partial.readableBytes() > options.maxDownload()) {
                    closed = true;
                    ctx.close();

--- a/projects/core/src/main/java/dan200/computercraft/core/apis/http/websocket/NoOriginWebSocketHandshaker.java
+++ b/projects/core/src/main/java/dan200/computercraft/core/apis/http/websocket/NoOriginWebSocketHandshaker.java
@@ -16,8 +16,8 @@ import java.net.URI;
 * A version of {@link WebSocketClientHandshaker13} which doesn't add the {@link HttpHeaderNames#ORIGIN} header to the
 * original HTTP request.
 */
-public class NoOriginWebSocketHandshaker extends WebSocketClientHandshaker13 {
-    public NoOriginWebSocketHandshaker(URI webSocketURL, WebSocketVersion version, String subprotocol, boolean allowExtensions, HttpHeaders customHeaders, int maxFramePayloadLength) {
+class NoOriginWebSocketHandshaker extends WebSocketClientHandshaker13 {
+    NoOriginWebSocketHandshaker(URI webSocketURL, WebSocketVersion version, String subprotocol, boolean allowExtensions, HttpHeaders customHeaders, int maxFramePayloadLength) {
        super(webSocketURL, version, subprotocol, allowExtensions, customHeaders, maxFramePayloadLength);
    }

--- a/projects/core/src/main/java/dan200/computercraft/core/apis/http/websocket/Websocket.java
+++ b/projects/core/src/main/java/dan200/computercraft/core/apis/http/websocket/Websocket.java
@@ -12,8 +12,9 @@ import dan200.computercraft.core.apis.http.NetworkUtils;
 import dan200.computercraft.core.apis.http.Resource;
 import dan200.computercraft.core.apis.http.ResourceGroup;
 import dan200.computercraft.core.apis.http.options.Options;
-import dan200.computercraft.core.util.IoUtil;
+import dan200.computercraft.core.metrics.Metrics;
 import io.netty.bootstrap.Bootstrap;
+import io.netty.buffer.Unpooled;
 import io.netty.channel.Channel;
 import io.netty.channel.ChannelFuture;
 import io.netty.channel.ChannelInitializer;
@@ -23,21 +24,22 @@ import io.netty.handler.codec.http.HttpClientCodec;
 import io.netty.handler.codec.http.HttpHeaderNames;
 import io.netty.handler.codec.http.HttpHeaders;
 import io.netty.handler.codec.http.HttpObjectAggregator;
+import io.netty.handler.codec.http.websocketx.BinaryWebSocketFrame;
+import io.netty.handler.codec.http.websocketx.TextWebSocketFrame;
 import io.netty.handler.codec.http.websocketx.WebSocketClientProtocolHandler;
 import io.netty.handler.codec.http.websocketx.WebSocketVersion;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;

 import javax.annotation.Nullable;
-import java.lang.ref.WeakReference;
 import java.net.URI;
-import java.net.URISyntaxException;
+import java.nio.ByteBuffer;
 import java.util.concurrent.Future;

 /**
 * Provides functionality to verify and connect to a remote websocket.
 */
-public class Websocket extends Resource<Websocket> {
+public class Websocket extends Resource<Websocket> implements WebsocketClient {
    private static final Logger LOG = LoggerFactory.getLogger(Websocket.class);

    /**
@@ -46,14 +48,8 @@ public class Websocket extends Resource<Websocket> {
     */
    public static final int MAX_MESSAGE_SIZE = 1 << 30;

-    static final String SUCCESS_EVENT = "websocket_success";
-    static final String FAILURE_EVENT = "websocket_failure";
-    static final String CLOSE_EVENT = "websocket_closed";
-    static final String MESSAGE_EVENT = "websocket_message";
-
    private @Nullable Future<?> executorFuture;
-    private @Nullable ChannelFuture connectFuture;
-    private @Nullable WeakReference<WebsocketHandle> websocketHandle;
+    private @Nullable ChannelFuture channelFuture;

    private final IAPIEnvironment environment;
    private final URI uri;
@@ -70,38 +66,6 @@ public class Websocket extends Resource<Websocket> {
        this.timeout = timeout;
    }

-    public static URI checkUri(String address) throws HTTPRequestException {
-        URI uri = null;
-        try {
-            uri = new URI(address);
-        } catch (URISyntaxException ignored) {
-            // Fall through to the case below
-        }
-
-        if (uri == null || uri.getHost() == null) {
-            try {
-                uri = new URI("ws://" + address);
-            } catch (URISyntaxException ignored) {
-                // Fall through to the case below
-            }
-        }
-
-        if (uri == null || uri.getHost() == null) throw new HTTPRequestException("URL malformed");
-
-        var scheme = uri.getScheme();
-        if (scheme == null) {
-            try {
-                uri = new URI("ws://" + uri);
-            } catch (URISyntaxException e) {
-                throw new HTTPRequestException("URL malformed");
-            }
-        } else if (!scheme.equalsIgnoreCase("wss") && !scheme.equalsIgnoreCase("ws")) {
-            throw new HTTPRequestException("Invalid scheme '" + scheme + "'");
-        }
-
-        return uri;
-    }
-
    public void connect() {
        if (isClosed()) return;
        executorFuture = NetworkUtils.EXECUTOR.submit(this::doConnect);
@@ -122,7 +86,7 @@ public class Websocket extends Resource<Websocket> {
            // getAddress may have a slight delay, so let's perform another cancellation check.
            if (isClosed()) return;

-            connectFuture = new Bootstrap()
+            channelFuture = new Bootstrap()
                .group(NetworkUtils.LOOP_GROUP)
                .channel(NioSocketChannel.class)
                .handler(new ChannelInitializer<SocketChannel>() {
@@ -133,7 +97,7 @@ public class Websocket extends Resource<Websocket> {
                        var subprotocol = headers.get(HttpHeaderNames.SEC_WEBSOCKET_PROTOCOL);
                        var handshaker = new NoOriginWebSocketHandshaker(
                            uri, WebSocketVersion.V13, subprotocol, true, headers,
-                            options.websocketMessage <= 0 ? MAX_MESSAGE_SIZE : options.websocketMessage
+                            options.websocketMessage() <= 0 ? MAX_MESSAGE_SIZE : options.websocketMessage()
                        );

                        var p = ch.pipeline();
@@ -162,12 +126,12 @@ public class Websocket extends Resource<Websocket> {
        }
    }

-    void success(Channel channel, Options options) {
+    void success(Options options) {
        if (isClosed()) return;

-        var handle = new WebsocketHandle(this, options, channel);
+        var handle = new WebsocketHandle(environment, address, this, options);
        environment().queueEvent(SUCCESS_EVENT, address, handle);
-        websocketHandle = createOwnerReference(handle);
+        createOwnerReference(handle);

        checkClosed();
    }
@@ -189,19 +153,35 @@ public class Websocket extends Resource<Websocket> {
        super.dispose();

        executorFuture = closeFuture(executorFuture);
-        connectFuture = closeChannel(connectFuture);
-
-        var websocketHandleRef = websocketHandle;
-        var websocketHandle = websocketHandleRef == null ? null : websocketHandleRef.get();
-        IoUtil.closeQuietly(websocketHandle);
-        this.websocketHandle = null;
+        channelFuture = closeChannel(channelFuture);
    }

-    public IAPIEnvironment environment() {
+    IAPIEnvironment environment() {
        return environment;
    }

-    public String address() {
+    String address() {
        return address;
    }
+
+    private @Nullable Channel channel() {
+        var channel = channelFuture;
+        return channel == null ? null : channel.channel();
+    }
+
+    @Override
+    public void sendText(String message) {
+        environment.observe(Metrics.WEBSOCKET_OUTGOING, message.length());
+
+        var channel = channel();
+        if (channel != null) channel.writeAndFlush(new TextWebSocketFrame(message));
+    }
+
+    @Override
+    public void sendBinary(ByteBuffer message) {
+        environment.observe(Metrics.WEBSOCKET_OUTGOING, message.remaining());
+
+        var channel = channel();
+        if (channel != null) channel.writeAndFlush(new BinaryWebSocketFrame(Unpooled.wrappedBuffer(message)));
+    }
 }
--- a/projects/core/src/main/java/dan200/computercraft/core/apis/http/websocket/WebsocketClient.java
+++ b/projects/core/src/main/java/dan200/computercraft/core/apis/http/websocket/WebsocketClient.java
@@ -0,0 +1,90 @@
+// SPDX-FileCopyrightText: 2023 The CC: Tweaked Developers
+//
+// SPDX-License-Identifier: MPL-2.0
+
+package dan200.computercraft.core.apis.http.websocket;
+
+import dan200.computercraft.core.apis.http.HTTPRequestException;
+
+import java.io.Closeable;
+import java.net.URI;
+import java.net.URISyntaxException;
+import java.nio.ByteBuffer;
+
+/**
+ * A client-side websocket, which can be used to send messages to a remote server.
+ * <p>
+ * {@link WebsocketHandle} wraps this into a Lua-compatible interface.
+ */
+public interface WebsocketClient extends Closeable {
+    String SUCCESS_EVENT = "websocket_success";
+    String FAILURE_EVENT = "websocket_failure";
+    String CLOSE_EVENT = "websocket_closed";
+    String MESSAGE_EVENT = "websocket_message";
+
+    /**
+     * Determine whether this websocket is closed.
+     *
+     * @return Whether this websocket is closed.
+     */
+    boolean isClosed();
+
+    /**
+     * Close this websocket.
+     */
+    @Override
+    void close();
+
+    /**
+     * Send a text websocket frame.
+     *
+     * @param message The message to send.
+     */
+    void sendText(String message);
+
+    /**
+     * Send a binary websocket frame.
+     *
+     * @param message The message to send.
+     */
+    void sendBinary(ByteBuffer message);
+
+    /**
+     * Parse an address, ensuring it is a valid websocket URI.
+     *
+     * @param address The address to parse.
+     * @return The parsed URI.
+     * @throws HTTPRequestException If the address is not valid.
+     */
+    static URI parseUri(String address) throws HTTPRequestException {
+        URI uri = null;
+        try {
+            uri = new URI(address);
+        } catch (URISyntaxException ignored) {
+            // Fall through to the case below
+        }
+
+        if (uri == null || uri.getHost() == null) {
+            try {
+                uri = new URI("ws://" + address);
+            } catch (URISyntaxException ignored) {
+                // Fall through to the case below
+            }
+        }
+
+        if (uri == null || uri.getHost() == null) throw new HTTPRequestException("URL malformed");
+
+        var scheme = uri.getScheme();
+        if (scheme == null) {
+            try {
+                uri = new URI("ws://" + uri);
+            } catch (URISyntaxException e) {
+                throw new HTTPRequestException("URL malformed");
+            }
+        } else if (!scheme.equalsIgnoreCase("wss") && !scheme.equalsIgnoreCase("ws")) {
+            throw new HTTPRequestException("Invalid scheme '" + scheme + "'");
+        }
+
+        return uri;
+    }
+}
--- a/Show More
+++ b/Show More
Author	SHA1	Message	Date
Jonathan Coates	3ebdf7ef5e	Bump CC:T to 1.108.3	2023-10-08 15:25:45 +01:00
Jonathan Coates	905d4cb091	Fix crash when joining a dedicated server We can't use FriendlyByte.readCollection to read to a pre-allocated/array-backed NonNullList, as that doesn't implement List.add. Instead, we just need to do a normal loop. We add a couple of tests to round-trip our recipe specs. Unfortunately we can't test the recipes themselves as our own registries aren't set up, so this'll have to do for now.	2023-10-08 15:22:32 +01:00
Jonathan Coates	e7ab05d064	Bump CC:T to 1.108.2	2023-10-08 13:27:24 +01:00
Jonathan Coates	6ec34b42e5	Small cleanup to our web build scripts - Update to Rollup 4.x - Replace terser and postcss with swc and lightningcss. This is definitely more code for us to write (maybe I should turn them into proper plugins we can depend on), but both speedier and fewer dependencies. - Drop dependency on glob - we can get away with fs.readdir for what we needed it for.	2023-10-08 13:14:02 +01:00
Jonathan Coates	ab785a0906	Fix monitors being warped after a resize Oh, this was a really nasty bug to reproduce. I'm not sure why - it's very simple - I guess I've only just seen screenshots of it, and never sat down to try myself. Reminder to actually report your bugs folks! In this case: 1. Place down three down three monitors and then a computer. 2. Display something on the monitor (monitor left paint a) is my go-to. 3. Break the middle monitor. We'd expect the left most monitor to be cleared, however it actually preserves the monitor contents, resizing (and skewing it) to fit on its new size! This is because we clear the server monitor, but never sync that over to the client, so the client monitor retains the old contents. To fix that, instead of nulling out the server monitor, we null out the underlying Terminal. This causes the change to be synced, fixing the bug.	2023-10-03 18:20:44 +01:00
Jonathan Coates	4541decd40	Fix canvas not always being redrawn on term resize Paint implements its menu slightly differently to edit, in that it takes control of the event loop until the menu is closed. This means that the term_resize event is ignored, and so the canvas not redrawn when the menu is open.	2023-10-03 18:18:33 +01:00
Spongecade	747a5a53b4	Update Minecraft wiki links to new domain (#1601 )	2023-10-03 15:55:20 +00:00
Jonathan Coates	c0643fadca	Build a web-based emulator for the documentation site (#1597 ) Historically we've used copy-cat to provide a web-based emulator for running example code on our documentation site. However, copy-cat is often out-of-date with CC:T, which means example snippets fail when you try to run them! This commit vendors in copy-cat (or rather an updated version of it) into CC:T itself, allowing us to ensure the emulator is always in sync with the mod. While the ARCHITECTURE.md documentation goes into a little bit more detail here, the general implementation is as follows - In project/src/main we implement the core of the emulator. This includes a basic reimplementation of some of CC's classes to work on the web (mostly the HTTP API and ComputerThread), and some additional code to expose the computers to Javascript. - This is all then compiled to Javascript using [TeaVM][1] (we actually use a [personal fork of it][2] as there's a couple of changes I've not upstreamed yet). - The Javascript side then pulls in the these compiled classes (and the CC ROM) and hooks them up to [cc-web-term][3] to display the actual computer. - As we're no longer pulling in copy-cat, we can simplify our bundling system a little - we now just compile to ESM modules directly. [1]: https://github.com/konsoletyper/teavm [2]: https://github.com/SquidDev/teavm/tree/squid-patches [3]: https://github.com/squiddev-cc/cc-web-term	2023-10-03 09:19:19 +01:00
Jonathan Coates	0a31de43c2	Run checkstyle on all source sets Had an issue last week where testFixtures had a couple of issues which I didn't pick up on, as the pre-commit hooks only check the main and test source set. We now add a per-project "checkstyle" task, which dependes on the per-source-set checkstyle tasks.	2023-10-03 09:06:17 +01:00
Jonathan Coates	96b6947ef2	Flesh out MemoryMount into a writable mount This moves MemoryMount to the main core module, and converts it to be a "proper" WritableMount. It's still naively implemented - definitely would be good to flesh out our tests in the future - but enough for what we need it for. We also do the following: - Remove the FileEntry.path variable, and instead pass the path around as a variable. - Clean up BinaryReadableHandle to use ByteBuffers in a more idiomatic way. - Add a couple more tests to our FS tests. These are in a bit of an odd place, where we want both Lua tests (for emulator compliance) and Java tests (for testing different implementations) - something to think about in the future.	2023-09-29 22:15:23 +01:00
Jonathan Coates	e7a1065bfc	Move file transfer API to the code library This is useful for emulators, which might want to emulate the event.	2023-09-29 21:09:23 +01:00
Jonathan Coates	663eecff0c	Relocate our existing web code to subdirectories - Move the frontend code into src/frontend - Move our custom element SSR system into src/htmlTransform. This is mostly in prep for merging in copy-cat's core, as that's a whole bunch of extra code.	2023-09-28 21:00:07 +01:00
Jonathan Coates	e6125bcf60	Try to make recipe serialisers more reusable This attempts to reduce some duplication in recipe serialisation (and deserialisation) by moving the structure of a recipe (group, category, ingredients, result) into seprate types. - Add ShapedRecipeSpec and ShapelessRecipeSpec, which store the core properties of shaped and shapeless recipes. There's a couple of additional classes here for handling some of the other shared or complex logic. - These classes are now used by two new Custom{Shaped,Shapeless}Recipe classes, which are (mostly) equivalent to Minecraft's shaped/shapeless recipes, just with support for nbt in results. - All the other similar recipes now inherit from these base classes, which allows us to reuse a lot of this serialisation code. Alas, the total code size has still gone up - maybe there's too much abstraction here :). - Mostly unrelated, but fix the skull recipes using the wrong UUID format. This allows us to remove our mixin for nbt in recipes (as we just use our custom recipe now) and simplify serialisation a bit - hopefully making the switch to codecs a little easier.	2023-09-23 18:24:02 +01:00
Jonathan Coates	0d6c6e7ae7	Hoist some ArchiveMount logic into a new superclass - Add AbstractInMemoryMount, which contains all of ArchiveMount's file tree logic, but not the caching functionality. - Convert MemoryMount to inherit from AbstractInMemoryMount. - Add a helper method to add a file to an AbstractInMemoryMount, and use that within {Resource,Jar}Mount. There's definitely more work to be done here - it might be nice to split FileEntry into separate Directory and File interfaces, or at least make them slightly more immutable, but that's definitely a future job.	2023-09-22 07:46:39 +01:00
Jonathan Coates	ae71eb3cae	Reduce coupling in websocket code - Add a new WebsocketClient interface, which WebsocketHandle uses for sending messages and closing. This reduces coupling between Websocket and WebsocketHandle, which is nice, though admitedly only use for copy-cat :). - WebsocketHandle now uses Websocket(Client).isClosed(), rather than tracking the closed state itself - this makes the class mostly a thin Lua wrapper over the client, which is nice. - Convert Options into a record. - Clarify the behaviour of ws.close() and the websocket_closed event. Our previous test was incorrect as it called WebsocketHandle.close (rather than WebsocketHandle.doClose), which had slightly different semantics in whether the event is queued.	2023-09-21 18:59:15 +01:00
Jonathan Coates	3188197447	Use Preact for static rendering of components We already use preact for the copy-cat integration, so it makes sense to use it during the static pass too. This allows us to drop a dependency on react.	2023-09-20 22:09:58 +01:00
Jonathan Coates	6c8b391dab	Some web tooling changes - Switch to tsx from ts-node, fixing issues on Node 20 - Update rehype	2023-09-18 17:15:03 +01:00
Jonathan Coates	b1248e4901	Add a tag for blocks wired modems should ignore Includes wired modems (as before), but can be extended by other mods if needed.	2023-09-11 21:29:17 +01:00
Jonathan Coates	56d97630e8	Bump CC:T to 1.108.1	2023-09-06 09:51:16 +01:00
Jonathan Coates	e660192f08	Make command computer permission checks stricter - Placing a command computer requires the player to be in creative and opped. - Breaking a command computer now requires the player to be opped, as well as in creative. As we've now got a dedicated item class for command comptuers, we move the command-specific IMedia override to that class. Fixes #1582.	2023-09-05 18:44:16 +01:00
Jonathan Coates	4e82bd352d	Bump the priority of the computer thread As this is responsible for interrupting computers, we should make sure its priority is higher than the background threads. It spends most of its time sleeping, so should be fine.	2023-09-05 18:39:55 +01:00
Jonathan Coates	07113c3e9b	Move command actions to their own methods Rather than having a mess of lambdas, we now move the bulk of the implemetation to their own methods. The lambdas now just do argument extraction - it's all stringly typed, so good to keep that with the argument definition. This also removes a couple of exception keys (and thus their translation keys) as we no longer use them.	2023-09-05 18:37:10 +01:00
Jonathan Coates	d562a051c7	Use method handlees in our generated Lua methods (#1579 ) When the target method is in a different class loader to CC, our generated method fails, as it cannot find the target class. To get around that, we create a MethodHandle to the target method, and then inject that into the generated class (with Java's new dynamic constant system). We can then invoke the MethodHandle in our generated code, avoiding any references to the target class/method.	2023-09-03 16:12:37 +00:00
Jonathan Coates	6ac09742fc	Fix errors from the typescript bump Looks like ./gradlew docWebsite didn't rebuild here.	2023-08-31 20:49:53 +01:00
Jonathan Coates	5dd6b9a637	Generic dependency update A couple of changes caused by checkstyle being a little more strict.	2023-08-31 19:14:37 +01:00