Disable requirements processor

- Also decrease allocated via gradle.properties
- Forces rebuild with new PE which will fix Geyser detection

.deepsource.toml

@@ -5,4 +5,4 @@ name = "java"
 enabled = true
 
   [analyzers.meta]
-  runtime_version = "16"
+  runtime_version = "17"

.editorconfig

@@ -0,0 +1,17 @@
+root = true
+
+[*]
+charset = utf-8
+indent_size = 4
+indent_style = space
+insert_final_newline = true
+max_line_length = 100
+tab_width = 4
+
+# intellij specific configuration
+ij_continuation_indent_size = 8
+ij_formatter_off_tag = @formatter:off
+ij_formatter_on_tag = @formatter:on
+ij_formatter_tags_enabled = false
+ij_smart_tabs = false
+ij_wrap_on_typing = false

.github/workflows/codeql-analysis.yml

@@ -39,11 +39,11 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
       # Initializes the CodeQL tools for scanning.
       - name: Initialize CodeQL
-        uses: github/codeql-action/init@v1
+        uses: github/codeql-action/init@v3
         with:
           languages: ${{ matrix.language }}
           # If you wish to specify custom queries, you can do so here or in a config file.
@@ -54,7 +54,7 @@ jobs:
       # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
       # If this step fails, then you should remove it and run the build manually (see below)
       - name: Autobuild
-        uses: github/codeql-action/autobuild@v1
+        uses: github/codeql-action/autobuild@v3
 
       # ℹ️ Command-line programs to run using the OS shell.
       # 📚 https://git.io/JvXDl
@@ -68,4 +68,4 @@ jobs:
       #   make release
 
       - name: Perform CodeQL Analysis
-        uses: github/codeql-action/analyze@v1
+        uses: github/codeql-action/analyze@v3

.github/workflows/gradle-publish.yml

@@ -19,20 +19,52 @@ jobs:
       packages: write
 
     steps:
-    - uses: actions/checkout@v3
-    - name: Set up JDK 17
-      uses: actions/setup-java@v3
+    - uses: actions/checkout@v4
+    - name: Set up JDK 21
+      uses: actions/setup-java@v4
       with:
-        java-version: '17'
+        java-version: '21'
         distribution: 'temurin'
         server-id: github # Value of the distributionManagement/repository/id field of the pom.xml
         settings-path: ${{ github.workspace }} # location for the settings.xml file
 
+
+    # Temporary tasks so built jar works because PacketEvents won't merge my fixes for their broken fabric support
+    - name: Clone Axionize's PacketEvents Repository
+      run: |
+          git clone -b fix/fabric-events https://github.com/Axionize/packetevents.git packetevents
+          cd packetevents
+          echo "Cloned PacketEvents repository"
+
+    - name: Build and Publish PacketEvents to Maven Local
+      uses: gradle/actions/setup-gradle@v3
+      with:
+          build-root-directory: packetevents
+          arguments: publishToMavenLocal
+
+    - name: Extract Version from build.gradle.kts
+      id: extract-version
+      run: |
+          # Extract the version from build.gradle.kts using grep and sed
+          VERSION=$(grep "^version\s*=" build.gradle.kts | sed 's/version\s*=\s*"\(.*\)"/\1/')
+          echo "VERSION: $VERSION"
+          echo "VERSION=$VERSION" >> $GITHUB_ENV
+          echo "version=$VERSION" >> $GITHUB_OUTPUT
+
     - name: Build with Gradle
-      uses: gradle/gradle-build-action@67421db6bd0bf253fb4bd25b31ebb98943c375e1
+      uses: gradle/actions/setup-gradle@v3
       with:
         arguments: build
-    - name: Upload a Build Artifact
-      uses: actions/upload-artifact@v3.1.0
+
+    - name: Upload Bukkit Artifact
+      uses: actions/upload-artifact@v4
       with:
-        path: /home/runner/work/Grim/Grim/build/libs/**.jar
+          name: grimac-bukkit
+          path: ${{ github.workspace }}/bukkit/build/libs/grimac-bukkit-${{ env.VERSION }}.jar
+
+    - name: Upload Fabric Artifact
+      uses: actions/upload-artifact@v4
+      with:
+          name: grimac-fabric
+          path: ${{ github.workspace }}/fabric/build/libs/grimac-fabric-${{ env.VERSION }}.jar
+

.gitignore

@@ -65,4 +65,10 @@ nb-configuration.xml
 ##############################
 ## OS X
 ##############################
-.DS_Store
+.DS_Store
+
+##############################
+## Fabric
+##############################
+run/
+fabric/run/

README.md

@@ -1,27 +1,48 @@
 # GrimAC
 
-This project is considered feature complete for the 2.0 (open-source) branch of this project. If you would like a bugfix or enhancement and cannot sponsor the work, pull requests are welcome. You can join the [discord](https://discord.com/invite/kqQAhTmkUF) for jar releases & changelogs.
-
 GrimAC is an open source Minecraft anticheat designed for 1.21 and supports 1.8-1.21. It is free while in beta. It will eventually become paid and/or will include offering additional subscription based paid checks. Geyser players are fully exempt.
 
-### Compiling through terminal/command prompt
-1. git clone https://github.com/GrimAnticheat/Grim.git (or click the green code button, download ZIP, then unzip it.)
-2. cd Grim
-3. gradlew build
-4. The final jar is located in build/libs
+This project is considered feature complete for the 2.0 (open-source) branch of this project. If you would like a bugfix or enhancement and cannot sponsor the work, pull requests are welcome.
 
-### API Information
-Grim's API allows you to integrate Grim into your own plugins. For more information, check out the API's GitHub repository [here](https://github.com/GrimAnticheat/GrimAPI).
+## Downloads
+- [Modrinth](https://modrinth.com/plugin/grimac)
+- [Hangar](https://hangar.papermc.io/GrimAnticheat/GrimAnticheat)
+- [SpigotMC](https://www.spigotmc.org/resources/grim-anticheat.99923/)
+- *For bleeding edge builds use* [Github artifacts](https://nightly.link/GrimAnticheat/Grim/workflows/gradle-publish/2.0/artifact.zip)
+
+## Installation notes
+> [!WARNING]
+> Java 17 is now required. More information [here](https://github.com/GrimAnticheat/Grim/wiki/Updating-to-Java-17).
+- Paper, Spigot, and Folia are currently supported.
+- If you use Geyser, place Floodgate on the backend server so grim can exempt bedrock players. Grim cannot access the Floodgate API if it is on the proxy.
+- If you use ViaVersion, it should be on the backend server as movement is highly dependent on client version.
+
+## Support & wiki information
+- Support & discussion: [Discord](https://discord.com/invite/kqQAhTmkUF)
+- Report issues: [Issues](https://github.com/GrimAnticheat/Grim/issues/new/choose)
+- Wiki & examples: [Wiki](https://github.com/GrimAnticheat/Grim/wiki)
+
+## Developer API
+Grim's API allows you to integrate Grim into your own plugins.
+- API repository: [GrimAPI](https://github.com/GrimAnticheat/GrimAPI)
+- Wiki info: [Wiki](https://github.com/GrimAnticheat/GrimAPI)
+
+## How to compile
+
+1. `git clone https://github.com/GrimAnticheat/Grim.git`
+2. `cd Grim`
+3. `./gradlew build`
+4. The final jar will compile into the build/libs folder
 
 ## Grim supremacy
 
-Here are the main cores that make Grim stand out against other anticheats
+What makes Grim stand out against other anticheats?
 
 ### Movement Simulation Engine
 
 * We have a 1:1 replication of the player's possible movements
-* This covers everything from basic walking, swimming, knockback, cobwebs, to bubble columns
-* It even covers riding entities from boats to pigs to striders
+    * This covers everything from basic walking, swimming, knockback, cobwebs, to bubble columns
+    * It even covers riding entities from boats to pigs to striders
 * Built upon covering edge cases to confirm accuracy
 * 1.13+ clients on 1.13+ servers, 1.12- clients on 1.13+ servers, 1.13+ clients on 1.12- servers, and 1.12- clients on 1.12- servers are all supported regardless of the large technical changes between these versions.
 * The order of collisions depends on the client version and is correct

build.gradle.kts

@@ -1,159 +1,18 @@
-import net.minecrell.pluginyml.bukkit.BukkitPluginDescription.Permission
-
-plugins {
-    id("java")
-    id("maven-publish")
-    id("com.github.johnrengelman.shadow") version "8.1.1"
-    id("io.freefair.lombok") version "8.6"
-    id("net.minecrell.plugin-yml.bukkit") version "0.6.0"
-}
-
 group = "ac.grim.grimac"
-version = "2.3.68"
+version = "2.3.71"
 description = "Libre simulation anticheat designed for 1.21 with 1.8-1.21 support, powered by PacketEvents 2.0."
-java.sourceCompatibility = JavaVersion.VERSION_1_8
-java.targetCompatibility = JavaVersion.VERSION_1_8
 
 // Set to false for debug builds
 // You cannot live reload classes if the jar relocates dependencies
-var relocate = true;
+// Checks Project properties -> environment variable -> defaults true
+extra["relocate"] = project.findProperty("relocate")?.toString()?.toBoolean()
+    ?: System.getenv("RELOCATE_JAR")?.toBoolean()
+            ?: true
 
-repositories {
-    mavenLocal()
-    maven("https://hub.spigotmc.org/nexus/content/repositories/snapshots/") // Spigot
-    maven("https://jitpack.io/") { // Grim API
-        content {
-            includeGroup("com.github.grimanticheat")
-        }
-    }
-    maven("https://repo.viaversion.com") // ViaVersion
-    maven("https://repo.aikar.co/content/groups/aikar/") // ACF
-    maven("https://nexus.scarsz.me/content/repositories/releases") // Configuralize
-    maven("https://repo.opencollab.dev/maven-snapshots/") // Floodgate
-    maven("https://repo.opencollab.dev/maven-releases/") // Cumulus (for Floodgate)
-    maven("https://repo.codemc.io/repository/maven-releases/") // PacketEvents
-    maven("https://repo.codemc.io/repository/maven-snapshots/")
-    mavenCentral()
-    // FastUtil, Discord-Webhooks
+// Build Optimization:
+// - Add parallel build support
+// - Add build caching
+tasks.withType<JavaCompile>().configureEach {
+    options.isFork = true
+    options.isIncremental = true
 }
-
-dependencies {
-    implementation("com.github.retrooper:packetevents-spigot:2.5.1-SNAPSHOT")
-    implementation("co.aikar:acf-paper:0.5.1-SNAPSHOT")
-    implementation("club.minnced:discord-webhooks:0.8.0") // Newer versions include kotlin-stdlib, which leads to incompatibility with plugins that use Kotlin
-    implementation("it.unimi.dsi:fastutil:8.5.13")
-    implementation("github.scarsz:configuralize:1.4.0")
-
-    implementation("com.github.grimanticheat:grimapi:1193c4fa41")
-    // Used for local testing: implementation("ac.grim.grimac:grimapi:1.0")
-
-    implementation("org.jetbrains:annotations:24.1.0")
-    compileOnly("org.geysermc.floodgate:api:2.0-SNAPSHOT")
-    compileOnly("org.spigotmc:spigot-api:1.18.2-R0.1-SNAPSHOT")
-    compileOnly("com.viaversion:viaversion-api:4.9.4-SNAPSHOT")
-    //
-    compileOnly("io.netty:netty-all:4.1.85.Final")
-}
-
-bukkit {
-    name = "GrimAC"
-    author = "GrimAC"
-    main = "ac.grim.grimac.GrimAC"
-    apiVersion = "1.13"
-    foliaSupported = true
-
-    softDepend = listOf(
-        "ProtocolLib",
-        "ProtocolSupport",
-        "Essentials",
-        "ViaVersion",
-        "ViaBackwards",
-        "ViaRewind",
-        "Geyser-Spigot",
-        "floodgate",
-        "FastLogin"
-    )
-
-    permissions {
-        register("grim.alerts") {
-            description = "Receive alerts for violations"
-            default = Permission.Default.OP
-        }
-
-        register("grim.alerts.enable-on-join") {
-            description = "Enable alerts on join"
-            default = Permission.Default.OP
-        }
-
-        register("grim.performance") {
-            description = "Check performance metrics"
-            default = Permission.Default.OP
-        }
-
-        register("grim.profile") {
-            description = "Check user profile"
-            default = Permission.Default.OP
-        }
-
-        register("grim.brand") {
-            description = "Show client brands on join"
-            default = Permission.Default.OP
-        }
-
-        register("grim.sendalert") {
-            description = "Send cheater alert"
-            default = Permission.Default.OP
-        }
-
-        register("grim.nosetback") {
-            description = "Disable setback"
-            default = Permission.Default.FALSE
-        }
-
-        register("grim.nomodifypacket") {
-            description = "Disable modifying packets"
-            default = Permission.Default.FALSE
-        }
-
-        register("grim.exempt") {
-            description = "Exempt from all checks"
-            default = Permission.Default.FALSE
-        }
-    }
-}
-
-tasks.build {
-    dependsOn(tasks.shadowJar)
-}
-
-tasks.withType<JavaCompile> {
-    options.encoding = "UTF-8"
-}
-
-publishing.publications.create<MavenPublication>("maven") {
-    artifact(tasks["shadowJar"])
-}
-
-tasks.shadowJar {
-    minimize()
-    archiveFileName.set("${project.name}-${project.version}.jar")
-    if (relocate) {
-        relocate("io.github.retrooper.packetevents", "ac.grim.grimac.shaded.io.github.retrooper.packetevents")
-        relocate("com.github.retrooper.packetevents", "ac.grim.grimac.shaded.com.github.retrooper.packetevents")
-        relocate("co.aikar.commands", "ac.grim.grimac.shaded.acf")
-        relocate("co.aikar.locale", "ac.grim.grimac.shaded.locale")
-        relocate("club.minnced", "ac.grim.grimac.shaded.discord-webhooks")
-        relocate("github.scarsz.configuralize", "ac.grim.grimac.shaded.configuralize")
-        relocate("com.github.puregero", "ac.grim.grimac.shaded.com.github.puregero")
-        relocate("com.google.code.gson", "ac.grim.grimac.shaded.gson")
-        relocate("alexh", "ac.grim.grimac.shaded.maps")
-        relocate("it.unimi.dsi.fastutil", "ac.grim.grimac.shaded.fastutil")
-        relocate("net.kyori", "ac.grim.grimac.shaded.kyori")
-        relocate("okhttp3", "ac.grim.grimac.shaded.okhttp3")
-        relocate("okio", "ac.grim.grimac.shaded.okio")
-        relocate("org.yaml.snakeyaml", "ac.grim.grimac.shaded.snakeyaml")
-        relocate("org.json", "ac.grim.grimac.shaded.json")
-        relocate("org.intellij", "ac.grim.grimac.shaded.intellij")
-        relocate("org.jetbrains", "ac.grim.grimac.shaded.jetbrains")
-    }
-}

buildSrc/build.gradle.kts

@@ -0,0 +1,16 @@
+plugins {
+    `kotlin-dsl`
+    kotlin("plugin.serialization") version "1.9.0" // Use the same Kotlin version as your main project
+}
+
+repositories {
+    mavenCentral()
+    gradlePluginPortal()
+}
+
+dependencies {
+    implementation(libs.spotless)
+    implementation(libs.lombok)
+    implementation(libs.shadow)
+    implementation("org.jetbrains.kotlinx:kotlinx-serialization-json:1.6.0")
+}

buildSrc/settings.gradle.kts

@@ -0,0 +1,7 @@
+dependencyResolutionManagement {
+    versionCatalogs {
+        create("libs") {
+            from(files("../libs.versions.toml"))
+        }
+    }
+}

buildSrc/src/main/kotlin/grim.base-conventions.gradle.kts

@@ -0,0 +1,72 @@
+plugins {
+    `java-library`
+    id("io.freefair.lombok")
+    id("com.diffplug.spotless")
+}
+
+group = rootProject.group
+version = rootProject.version
+description = rootProject.description
+
+// Java compilation settings
+java {
+    toolchain.languageVersion.set(JavaLanguageVersion.of(21))
+    disableAutoTargetJvm()
+    withSourcesJar()
+    withJavadocJar()
+}
+
+tasks.withType<JavaCompile>().configureEach {
+    options.encoding = "UTF-8"
+    options.release.set(17)
+}
+
+// Lombok configuration
+//lombok {
+//    version.set("1.18.30") // Use the version from your version catalog if available
+//}
+
+// Spotless configuration
+spotless {
+    java {
+        endWithNewline()
+        indentWithSpaces(4)
+        removeUnusedImports()
+        trimTrailingWhitespace()
+        targetExclude("build/generated/**/*")
+    }
+
+    kotlinGradle {
+        endWithNewline()
+        indentWithSpaces(4)
+        trimTrailingWhitespace()
+    }
+}
+
+// Ensure spotlessApply runs before build
+tasks.build {
+    dependsOn(tasks.named("spotlessApply"))
+}
+
+// Process resources (e.g., for plugin metadata files)
+//tasks.processResources {
+//    inputs.property("version", project.version)
+//    filesMatching(listOf("plugin.yml", "bungee.yml", "velocity-plugin.json", "fabric.mod.json")) {
+//        expand("version" to project.version)
+//    }
+//}
+
+// Javadoc configuration
+tasks.javadoc {
+    title = "${rootProject.name}-${project.name} v${rootProject.version}"
+    options.encoding = "UTF-8"
+    options.overview =
+        rootProject.file("buildSrc/src/main/resources/javadoc-overview.html").toString()
+    setDestinationDir(file("${project.layout.buildDirectory.asFile.get()}/docs/javadoc"))
+    options {
+        (this as CoreJavadocOptions).addBooleanOption("Xdoclint:none", true)
+    }
+}
+
+// Default tasks
+defaultTasks("build")

buildSrc/src/main/kotlin/grim.jij-conventions.gradle.kts

@@ -0,0 +1,391 @@
+import kotlinx.serialization.json.*
+import java.util.jar.JarFile
+import java.util.zip.ZipEntry
+
+plugins {
+    `java-library`
+}
+
+val jijDependencies: Configuration by project.configurations.creating {
+    isCanBeResolved = true
+    isCanBeConsumed = false
+    extendsFrom(project.configurations.getByName("implementation"))
+    project.configurations.findByName("modImplementation")?.let { extendsFrom(it) }
+}
+
+data class DependencyIdentifier(
+    val group: String,
+    val name: String,
+    val version: String,
+    val classifier: String = "" // Add classifier field, default to empty string
+) {
+    override fun toString() = "$group:$name:$version${if (classifier.isNotEmpty()) ":$classifier" else ""}"
+}
+
+// Does not support extracting classifiers but while the fabric standard is ambiguous on whether they can be included
+// It does not appear dependency classifiers are in use by any mod I am aware of or can find
+fun parseFabricModJson(jarFile: File, project: Project): Set<DependencyIdentifier> {
+    val nestedJars = mutableSetOf<DependencyIdentifier>()
+    try {
+        JarFile(jarFile).use { jar ->
+            val fabricModJsonEntry: ZipEntry? = jar.getEntry("fabric.mod.json")
+            if (fabricModJsonEntry != null) {
+                jar.getInputStream(fabricModJsonEntry).bufferedReader().use { reader ->
+                    val jsonContent = reader.readText()
+                    val jsonElement = Json.parseToJsonElement(jsonContent)
+                    val jsonObject = jsonElement.jsonObject
+                    val jarsArray = jsonObject["jars"]?.jsonArray ?: return@use
+                    jarsArray.forEach { jarEntry: JsonElement ->
+                        val filePath =
+                            jarEntry.jsonObject["file"]?.jsonPrimitive?.content ?: return@forEach
+                        project.logger.debug(
+                            "Found nested JAR in fabric.mod.json: {} in {}",
+                            filePath,
+                            jarFile
+                        )
+                        val jarName = filePath.substringAfterLast("/")
+                        val parts = jarName.removeSuffix(".jar").split("-")
+                        if (parts.size >= 2) {
+                            val inferredName = parts.dropLast(1).joinToString("-")
+                            val inferredVersion = parts.last()
+                            nestedJars.add(DependencyIdentifier("", inferredName, inferredVersion))
+                            project.logger.debug("Inferred nested dependency from fabric.mod.json: :$inferredName:$inferredVersion")
+                        }
+                    }
+                }
+            }
+        }
+    } catch (e: Exception) {
+        project.logger.error("Failed to parse fabric.mod.json in $jarFile: ${e.message}")
+    }
+    return nestedJars
+}
+
+fun extractEmbeddedJars(jarFile: File, project: Project): Set<DependencyIdentifier> {
+    val embeddedJars = mutableSetOf<DependencyIdentifier>()
+    embeddedJars.addAll(parseFabricModJson(jarFile, project))
+    try {
+        JarFile(jarFile).use { jar ->
+            val entries = jar.entries()
+            while (entries.hasMoreElements()) {
+                val entry = entries.nextElement()
+                val entryName = entry.name
+                if (entryName.endsWith(".jar") && (entryName.startsWith("META-INF/jarjar/") || entryName.startsWith(
+                        "libs/"
+                    ) || entryName.startsWith("META-INF/jars/"))
+                ) {
+                    project.logger.debug("Found embedded JAR: {} in {}", entryName, jarFile)
+                    val tempFile = File.createTempFile("embedded-", ".jar")
+                    tempFile.deleteOnExit()
+                    jar.getInputStream(entry).use { input ->
+                        tempFile.outputStream().use { output ->
+                            input.copyTo(output)
+                        }
+                    }
+                    JarFile(tempFile).use { embeddedJar ->
+                        val manifest = embeddedJar.manifest
+                        if (manifest != null) {
+                            val group =
+                                manifest.mainAttributes.getValue("Implementation-Vendor") ?: ""
+                            val name = manifest.mainAttributes.getValue("Implementation-Title")
+                                ?: embeddedJar.name
+                            val version =
+                                manifest.mainAttributes.getValue("Implementation-Version") ?: ""
+                            if (group.isNotEmpty() && name.isNotEmpty() && version.isNotEmpty()) {
+                                embeddedJars.add(DependencyIdentifier(group, name, version))
+                                project.logger.debug("Identified embedded dependency: $group:$name:$version")
+                            } else {
+                                val jarName = entryName.substringAfterLast("/")
+                                val parts = jarName.removeSuffix(".jar").split("-")
+                                if (parts.size >= 2) {
+                                    val inferredName = parts.dropLast(1).joinToString("-")
+                                    val inferredVersion = parts.last()
+                                    embeddedJars.add(
+                                        DependencyIdentifier(
+                                            "",
+                                            inferredName,
+                                            inferredVersion
+                                        )
+                                    )
+                                    project.logger.debug("Inferred embedded dependency from filename: :$inferredName:$inferredVersion")
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    } catch (e: Exception) {
+        project.logger.error("Failed to analyze JAR file $jarFile for embedded JARs: ${e.message}")
+    }
+    return embeddedJars
+}
+
+fun shouldExcludeDependency(
+    dependency: ResolvedDependency,
+    allEmbeddedDependencies: Set<DependencyIdentifier>,
+    actuallyIncludedDependencies: Set<DependencyIdentifier>,
+    project: Project
+): Boolean {
+    val group = dependency.moduleGroup
+    val name = dependency.moduleName
+    val version = dependency.moduleVersion
+    // Extract classifier from resolved dependency (if available)
+    val classifier = dependency.moduleArtifacts.firstOrNull()?.classifier ?: ""
+    val depId = DependencyIdentifier(group, name, version, classifier)
+
+    if (group.startsWith("net.minecraft") ||
+        group.startsWith("net.fabricmc") ||
+        name == "minecraft" ||
+        name == "fabric-loader" ||
+        name == "fastutil" ||
+        name.startsWith("fabric_") ||
+        name.startsWith("fabric-api")
+    ) {
+        project.logger.debug("Excluding platform dependency: {}", depId)
+        return true
+    }
+
+    if (name.endsWith("-bom") || name.contains("_bom")) {
+        project.logger.debug("Excluding BOM file: {}", depId)
+        return true
+    }
+
+    if (allEmbeddedDependencies.any { it.name == name && it.version == version && it.classifier == classifier }) {
+        project.logger.debug("Excluding dependency already embedded in another JAR: {}", depId)
+        return true
+    }
+
+    if (actuallyIncludedDependencies.any { it.name == name && it.version == version && it.classifier == classifier }) {
+        project.logger.debug("Excluding duplicate dependency: {}", depId)
+        return true
+    }
+
+    return false
+}
+
+fun isJijTarget(
+    dependency: ResolvedDependency,
+    allEmbeddedDependencies: Set<DependencyIdentifier>,
+    actuallyIncludedDependencies: Set<DependencyIdentifier>,
+    project: Project
+): Boolean {
+    val classifier = dependency.moduleArtifacts.firstOrNull()?.classifier ?: ""
+    project.logger.debug(
+        "Checking JIJ target: {}",
+        DependencyIdentifier(
+            dependency.moduleGroup,
+            dependency.moduleName,
+            dependency.moduleVersion,
+            classifier
+        )
+    )
+    return !shouldExcludeDependency(
+        dependency,
+        allEmbeddedDependencies,
+        actuallyIncludedDependencies,
+        project
+    )
+}
+
+fun includeDependencyWithExclusions(
+    depId: DependencyIdentifier,
+    project: Project,
+    actuallyIncludedDependencies: MutableSet<DependencyIdentifier>,
+    allEmbeddedDependencies: Set<DependencyIdentifier>
+) {
+    project.logger.debug("Including external dependency as JIJ with dynamic exclusions: {}", depId)
+    project.dependencies {
+        // Include dependency with classifier (if present)
+        "include"("${depId.group}:${depId.name}:${depId.version}${if (depId.classifier.isNotEmpty()) ":${depId.classifier}" else ""}") {
+            allEmbeddedDependencies.forEach { embeddedDep ->
+                if (embeddedDep.group.isNotEmpty()) {
+                    exclude(group = embeddedDep.group, module = embeddedDep.name)
+                } else {
+                    exclude(module = embeddedDep.name)
+                }
+                project.logger.debug("Excluding embedded transitive dependency: ${embeddedDep.name}:${embeddedDep.version}${if (embeddedDep.classifier.isNotEmpty()) ":${embeddedDep.classifier}" else ""}")
+            }
+        }
+    }
+    actuallyIncludedDependencies.add(depId)
+}
+
+fun processDependencies(
+    dependencies: Set<ResolvedDependency>,
+    processed: MutableSet<String>,
+    allEmbeddedDependencies: MutableMap<DependencyIdentifier, File>,
+    actuallyIncludedDependencies: MutableSet<DependencyIdentifier>,
+    project: Project
+) {
+    dependencies.forEach { dep: ResolvedDependency ->
+        val classifier = dep.moduleArtifacts.firstOrNull()?.classifier ?: ""
+        val depKey = "${dep.moduleGroup}:${dep.moduleName}:${dep.moduleVersion}${if (classifier.isNotEmpty()) ":$classifier" else ""}"
+        val depId = DependencyIdentifier(dep.moduleGroup, dep.moduleName, dep.moduleVersion, classifier)
+        if (!processed.contains(depKey)) {
+            processed.add(depKey)
+            project.logger.debug("Resolved dependency: {}", depId)
+
+            val jarFile = dep.moduleArtifacts.firstOrNull()?.file
+            if (jarFile != null && jarFile.exists()) {
+                val embeddedJars = extractEmbeddedJars(jarFile, project)
+                embeddedJars.forEach { embeddedDep ->
+                    allEmbeddedDependencies[embeddedDep] = jarFile
+                }
+            }
+
+            if (isJijTarget(
+                    dep,
+                    allEmbeddedDependencies.keys,
+                    actuallyIncludedDependencies,
+                    project
+                )
+            ) {
+                project.logger.debug("Processing JIJ dependency: {}", depId)
+                val isProjectDependency = project.rootProject.allprojects.any { subproject ->
+                    subproject.name == dep.moduleName && (subproject.group == dep.moduleGroup || dep.moduleGroup.isEmpty())
+                }
+                if (isProjectDependency) {
+                    val projectPath = project.rootProject.allprojects.find { subproject ->
+                        subproject.name == dep.moduleName && (subproject.group == dep.moduleGroup || dep.moduleGroup.isEmpty())
+                    }?.path
+                        ?: throw IllegalStateException("Project dependency not found: ${dep.moduleName}")
+                    project.logger.debug("Including project dependency as JIJ: $projectPath")
+                    project.dependencies {
+                        "include"(project.project(projectPath))
+                    }
+                    actuallyIncludedDependencies.add(depId)
+                } else {
+                    includeDependencyWithExclusions(
+                        depId,
+                        project,
+                        actuallyIncludedDependencies,
+                        allEmbeddedDependencies.keys
+                    )
+                }
+            }
+
+            processDependencies(
+                dep.children,
+                processed,
+                allEmbeddedDependencies,
+                actuallyIncludedDependencies,
+                project
+            )
+        }
+    }
+}
+
+project.afterEvaluate {
+    project.logger.debug("Resolving jijDependencies configuration")
+    val resolvedDependencies = jijDependencies.resolvedConfiguration.firstLevelModuleDependencies
+
+    val processed = mutableSetOf<String>()
+    val allEmbeddedDependencies = mutableMapOf<DependencyIdentifier, File>()
+    val actuallyIncludedDependencies = mutableSetOf<DependencyIdentifier>()
+
+    fun collectAllEmbeddedDependencies(dependencies: Set<ResolvedDependency>) {
+        dependencies.forEach { dep ->
+            val classifier = dep.moduleArtifacts.firstOrNull()?.classifier ?: ""
+            val depKey = "${dep.moduleGroup}:${dep.moduleName}:${dep.moduleVersion}${if (classifier.isNotEmpty()) ":$classifier" else ""}"
+            if (!processed.contains(depKey)) {
+                processed.add(depKey)
+                val jarFile = dep.moduleArtifacts.firstOrNull()?.file
+                if (jarFile != null && jarFile.exists()) {
+                    val embeddedJars = extractEmbeddedJars(jarFile, project)
+                    embeddedJars.forEach { embeddedDep ->
+                        allEmbeddedDependencies[embeddedDep] = jarFile
+                        project.logger.debug(
+                            "Collected embedded dependency: {} from {}",
+                            embeddedDep,
+                            jarFile
+                        )
+                    }
+                }
+                collectAllEmbeddedDependencies(dep.children)
+            }
+        }
+    }
+
+    processed.clear()
+    collectAllEmbeddedDependencies(resolvedDependencies)
+
+    processed.clear()
+    processDependencies(
+        resolvedDependencies,
+        processed,
+        allEmbeddedDependencies,
+        actuallyIncludedDependencies,
+        project
+    )
+}
+
+tasks.withType<Jar>().configureEach {
+    doFirst {
+        project.logger.debug("Resolving JIJ dependencies for JAR inclusion")
+        val resolvedDependencies =
+            jijDependencies.resolvedConfiguration.firstLevelModuleDependencies
+        val processed = mutableSetOf<String>()
+        val allEmbeddedDependencies = mutableMapOf<DependencyIdentifier, File>()
+        val actuallyIncludedDependencies = mutableSetOf<DependencyIdentifier>()
+
+        fun collectAllEmbeddedDependencies(dependencies: Set<ResolvedDependency>) {
+            dependencies.forEach { dep ->
+                val depKey = "${dep.moduleGroup}:${dep.moduleName}:${dep.moduleVersion}"
+                if (!processed.contains(depKey)) {
+                    processed.add(depKey)
+                    val jarFile = dep.moduleArtifacts.firstOrNull()?.file
+                    if (jarFile != null && jarFile.exists()) {
+                        val embeddedJars = extractEmbeddedJars(jarFile, project)
+                        embeddedJars.forEach { embeddedDep ->
+                            allEmbeddedDependencies[embeddedDep] = jarFile
+                            project.logger.debug(
+                                "Collected embedded dependency for JAR: {} from {}",
+                                embeddedDep,
+                                jarFile
+                            )
+                        }
+                    }
+                    collectAllEmbeddedDependencies(dep.children)
+                }
+            }
+        }
+
+        processed.clear()
+        collectAllEmbeddedDependencies(resolvedDependencies)
+
+        processed.clear()
+
+        fun logDependencies(dependencies: Set<ResolvedDependency>) {
+            dependencies.forEach { dep ->
+                val depKey = "${dep.moduleGroup}:${dep.moduleName}:${dep.moduleVersion}"
+                val depId = DependencyIdentifier(dep.moduleGroup, dep.moduleName, dep.moduleVersion)
+                if (!processed.contains(depKey)) {
+                    processed.add(depKey)
+                    project.logger.debug("Resolved JIJ dependency for JAR: {}", depId)
+
+                    val jarFile = dep.moduleArtifacts.firstOrNull()?.file
+                    if (jarFile != null && jarFile.exists()) {
+                        val embeddedJars = extractEmbeddedJars(jarFile, project)
+                        embeddedJars.forEach { embeddedDep ->
+                            allEmbeddedDependencies[embeddedDep] = jarFile
+                        }
+                    }
+
+                    if (isJijTarget(
+                            dep,
+                            allEmbeddedDependencies.keys,
+                            actuallyIncludedDependencies,
+                            project
+                        )
+                    ) {
+                        project.logger.debug("Including JIJ dependency in JAR: {}", depId)
+                        actuallyIncludedDependencies.add(depId)
+                    }
+                    logDependencies(dep.children)
+                }
+            }
+        }
+        logDependencies(resolvedDependencies)
+    }
+}

buildSrc/src/main/kotlin/grim.shadow-conventions.gradle.kts

@@ -0,0 +1,52 @@
+import com.github.jengelman.gradle.plugins.shadow.tasks.ShadowJar
+
+plugins {
+    id("com.gradleup.shadow")
+}
+
+val relocate: Boolean by rootProject.extra
+
+// Create a configuration for shading dependencies from common
+val shadowCommon: Configuration by project.configurations.creating {
+    isCanBeResolved = true
+    isCanBeConsumed = false
+    extendsFrom(project.configurations.getByName("implementation"))
+}
+
+tasks.named<ShadowJar>("shadowJar") {
+    minimize()
+    archiveFileName.set("${rootProject.name}-${project.name}-${rootProject.version}.jar")
+    from(shadowCommon) // Use from() instead of direct assignment
+
+    if (relocate) {
+        relocate(
+            "io.github.retrooper.packetevents",
+            "ac.grim.grimac.shaded.io.github.retrooper.packetevents"
+        )
+        relocate(
+            "com.github.retrooper.packetevents",
+            "ac.grim.grimac.shaded.com.github.retrooper.packetevents"
+        )
+        relocate("club.minnced", "ac.grim.grimac.shaded.discord-webhooks")
+        relocate("org.slf4j", "ac.grim.grimac.shaded.slf4j") // Required by discord-webhooks
+        relocate("github.scarsz.configuralize", "ac.grim.grimac.shaded.configuralize")
+        relocate("com.github.puregero", "ac.grim.grimac.shaded.com.github.puregero")
+        relocate("com.google.code.gson", "ac.grim.grimac.shaded.gson")
+        relocate("alexh", "ac.grim.grimac.shaded.maps")
+        relocate("it.unimi.dsi.fastutil", "ac.grim.grimac.shaded.fastutil")
+        relocate("net.kyori", "ac.grim.grimac.shaded.kyori")
+        relocate("okhttp3", "ac.grim.grimac.shaded.okhttp3")
+        relocate("okio", "ac.grim.grimac.shaded.okio")
+        relocate("org.yaml.snakeyaml", "ac.grim.grimac.shaded.snakeyaml")
+        relocate("org.json", "ac.grim.grimac.shaded.json")
+        relocate("org.intellij", "ac.grim.grimac.shaded.intellij")
+        relocate("org.jetbrains", "ac.grim.grimac.shaded.jetbrains")
+        relocate("org.incendo", "ac.grim.grimac.shaded.incendo")
+        relocate("io.leangen.geantyref", "ac.grim.grimac.shaded.geantyref") // Required by cloud
+    }
+    mergeServiceFiles()
+}
+
+tasks.named("assemble") {
+    dependsOn(tasks.named("shadowJar"))
+}

bukkit/build.gradle.kts

@@ -0,0 +1,139 @@
+import net.minecrell.pluginyml.bukkit.BukkitPluginDescription.Permission
+
+plugins {
+    `maven-publish`
+    grim.`base-conventions`
+    grim.`shadow-conventions`
+    id("net.minecrell.plugin-yml.bukkit") version "0.6.0"
+}
+
+repositories {
+    mavenLocal()
+    maven {
+        name = "papermc"
+        url = uri("https://repo.papermc.io/repository/maven-public/")
+    }
+    maven("https://hub.spigotmc.org/nexus/content/repositories/snapshots/") // Spigot
+    maven("https://jitpack.io/") { // Grim API
+        content {
+            includeGroup("com.github.grimanticheat")
+        }
+    }
+    maven("https://repo.viaversion.com") // ViaVersion
+    maven("https://nexus.scarsz.me/content/repositories/releases") // Configuralize
+    maven("https://repo.opencollab.dev/maven-snapshots/") // Floodgate
+    maven("https://repo.opencollab.dev/maven-releases/") // Cumulus (for Floodgate)
+    maven("https://repo.codemc.io/repository/maven-releases/") // PacketEvents
+    maven("https://repo.codemc.io/repository/maven-snapshots/")
+    maven("https://s01.oss.sonatype.org/content/repositories/snapshots/")
+    maven("https://repo.extendedclip.com/content/repositories/placeholderapi/") // placeholderapi
+    mavenCentral()
+    // FastUtil, Discord-Webhooks
+}
+
+dependencies {
+    compileOnly(libs.paper.api)
+    compileOnly(libs.placeholderapi)
+
+    implementation(libs.packetevents.spigot)
+    implementation(libs.cloud.paper)
+    implementation(libs.adventure.platform.bukkit)
+
+    implementation(project(":common"))
+    shadow(project(":common"))
+}
+
+bukkit {
+    name = "GrimAC"
+    author = "GrimAC"
+    main = "ac.grim.grimac.platform.bukkit.GrimACBukkitLoaderPlugin"
+    website = "https://grim.ac/"
+    apiVersion = "1.13"
+    foliaSupported = true
+
+    softDepend = listOf(
+        "ProtocolLib",
+        "ProtocolSupport",
+        "Essentials",
+        "ViaVersion",
+        "ViaBackwards",
+        "ViaRewind",
+        "Geyser-Spigot",
+        "floodgate",
+        "FastLogin",
+        "PlaceholderAPI",
+    )
+
+    permissions {
+        register("grim.alerts") {
+            description = "Receive alerts for violations"
+            default = Permission.Default.OP
+        }
+
+        register("grim.alerts.enable-on-join") {
+            description = "Enable alerts on join"
+            default = Permission.Default.OP
+        }
+
+        register("grim.performance") {
+            description = "Check performance metrics"
+            default = Permission.Default.OP
+        }
+
+        register("grim.profile") {
+            description = "Check user profile"
+            default = Permission.Default.OP
+        }
+
+        register("grim.brand") {
+            description = "Show client brands on join"
+            default = Permission.Default.OP
+        }
+
+        register("grim.brand.enable-on-join") {
+            description = "Enable showing client brands on join"
+            default = Permission.Default.OP
+        }
+
+        register("grim.sendalert") {
+            description = "Send cheater alert"
+            default = Permission.Default.OP
+        }
+
+        register("grim.nosetback") {
+            description = "Disable setback"
+            default = Permission.Default.FALSE
+        }
+
+        register("grim.nomodifypacket") {
+            description = "Disable modifying packets"
+            default = Permission.Default.FALSE
+        }
+
+        register("grim.exempt") {
+            description = "Exempt from all checks"
+            default = Permission.Default.FALSE
+        }
+
+        register("grim.verbose") {
+            description = "Receive verbose alerts for violations. Requires grim.alerts"
+            default = Permission.Default.OP
+        }
+
+        register("grim.verbose.enable-on-join") {
+            description =
+                "Enable verbose alerts on join. Requires grim.alerts and grim.alerts.enable-on-join"
+            default = Permission.Default.FALSE
+        }
+    }
+}
+
+publishing.publications.create<MavenPublication>("maven") {
+    artifact(tasks["shadowJar"])
+}
+
+tasks.shadowJar {
+    manifest {
+        attributes["paperweight-mappings-namespace"] = "mojang"
+    }
+}

bukkit/src/main/java/ac/grim/grimac/platform/bukkit/BukkitPlatformPlugin.java

@@ -0,0 +1,27 @@
+package ac.grim.grimac.platform.bukkit;
+
+import ac.grim.grimac.platform.api.PlatformPlugin;
+import org.bukkit.plugin.Plugin;
+
+public class BukkitPlatformPlugin implements PlatformPlugin {
+    private final Plugin plugin;
+
+    public BukkitPlatformPlugin(Plugin plugin) {
+        this.plugin = plugin;
+    }
+
+    @Override
+    public boolean isEnabled() {
+        return plugin.isEnabled();
+    }
+
+    @Override
+    public String getName() {
+        return plugin.getName();
+    }
+
+    @Override
+    public String getVersion() {
+        return plugin.getDescription().getVersion();
+    }
+}

bukkit/src/main/java/ac/grim/grimac/platform/bukkit/BukkitPlatformServer.java

@@ -0,0 +1,37 @@
+package ac.grim.grimac.platform.bukkit;
+
+import ac.grim.grimac.platform.api.PlatformServer;
+import ac.grim.grimac.platform.api.sender.Sender;
+import io.github.retrooper.packetevents.util.SpigotReflectionUtil;
+import org.bukkit.Bukkit;
+import org.bukkit.command.CommandSender;
+
+
+public class BukkitPlatformServer implements PlatformServer {
+
+    @Override
+    public String getPlatformImplementationString() {
+        return Bukkit.getVersion();
+    }
+
+    @Override
+    public void dispatchCommand(Sender sender, String command) {
+        CommandSender commandSender = GrimACBukkitLoaderPlugin.LOADER.getBukkitSenderFactory().reverse(sender);
+        Bukkit.dispatchCommand(commandSender, command);
+    }
+
+    @Override
+    public Sender getConsoleSender() {
+        return GrimACBukkitLoaderPlugin.LOADER.getBukkitSenderFactory().map(Bukkit.getConsoleSender());
+    }
+
+    @Override
+    public void registerOutgoingPluginChannel(String bungeeCord) {
+        GrimACBukkitLoaderPlugin.LOADER.getServer().getMessenger().registerOutgoingPluginChannel(GrimACBukkitLoaderPlugin.LOADER, "BungeeCord");
+    }
+
+    @Override
+    public double getTPS() {
+        return SpigotReflectionUtil.getTPS();
+    }
+}

bukkit/src/main/java/ac/grim/grimac/platform/bukkit/GrimACBukkitLoaderPlugin.java

@@ -0,0 +1,195 @@
+package ac.grim.grimac.platform.bukkit;
+
+import ac.grim.grimac.api.plugin.BasicGrimPlugin;
+import ac.grim.grimac.GrimAPI;
+import ac.grim.grimac.api.GrimAPIProvider;
+import ac.grim.grimac.api.GrimAbstractAPI;
+import ac.grim.grimac.api.plugin.GrimPlugin;
+import ac.grim.grimac.manager.init.Initable;
+import ac.grim.grimac.manager.init.start.ExemptOnlinePlayersOnReload;
+import ac.grim.grimac.manager.init.start.StartableInitable;
+import ac.grim.grimac.platform.api.Platform;
+import ac.grim.grimac.platform.api.PlatformLoader;
+import ac.grim.grimac.platform.api.PlatformServer;
+import ac.grim.grimac.platform.api.manager.ItemResetHandler;
+import ac.grim.grimac.platform.api.manager.MessagePlaceHolderManager;
+import ac.grim.grimac.platform.api.manager.ParserDescriptorFactory;
+import ac.grim.grimac.platform.api.manager.PermissionRegistrationManager;
+import ac.grim.grimac.platform.api.manager.PlatformPluginManager;
+import ac.grim.grimac.platform.api.player.PlatformPlayerFactory;
+import ac.grim.grimac.platform.api.scheduler.PlatformScheduler;
+import ac.grim.grimac.platform.api.sender.Sender;
+import ac.grim.grimac.platform.api.sender.SenderFactory;
+import ac.grim.grimac.platform.bukkit.initables.BukkitBStats;
+import ac.grim.grimac.platform.bukkit.initables.BukkitEventManager;
+import ac.grim.grimac.platform.bukkit.initables.BukkitTickEndEvent;
+import ac.grim.grimac.platform.bukkit.manager.BukkitItemResetHandler;
+import ac.grim.grimac.platform.bukkit.manager.BukkitMessagePlaceHolderManager;
+import ac.grim.grimac.platform.bukkit.manager.BukkitParserDescriptorFactory;
+import ac.grim.grimac.platform.bukkit.manager.BukkitPermissionRegistrationManager;
+import ac.grim.grimac.platform.bukkit.manager.BukkitPlatformPluginManager;
+import ac.grim.grimac.platform.bukkit.player.BukkitPlatformPlayerFactory;
+import ac.grim.grimac.platform.bukkit.scheduler.bukkit.BukkitPlatformScheduler;
+import ac.grim.grimac.platform.bukkit.scheduler.folia.FoliaPlatformScheduler;
+import ac.grim.grimac.platform.bukkit.sender.BukkitSenderFactory;
+import ac.grim.grimac.platform.bukkit.utils.placeholder.PlaceholderAPIExpansion;
+import ac.grim.grimac.utils.anticheat.MessageUtil;
+import ac.grim.grimac.utils.lazy.LazyHolder;
+import com.github.retrooper.packetevents.PacketEventsAPI;
+import io.github.retrooper.packetevents.factory.spigot.SpigotPacketEventsBuilder;
+import org.bukkit.Bukkit;
+import org.bukkit.command.CommandSender;
+import org.bukkit.plugin.ServicePriority;
+import org.bukkit.plugin.java.JavaPlugin;
+import org.incendo.cloud.CommandManager;
+import org.incendo.cloud.bukkit.CloudBukkitCapabilities;
+import org.incendo.cloud.execution.ExecutionCoordinator;
+import org.incendo.cloud.paper.LegacyPaperCommandManager;
+import org.jetbrains.annotations.NotNull;
+
+public final class GrimACBukkitLoaderPlugin extends JavaPlugin implements PlatformLoader {
+
+    public static GrimACBukkitLoaderPlugin LOADER;
+
+    private final LazyHolder<PlatformScheduler> scheduler = LazyHolder.simple(this::createScheduler);
+    private final LazyHolder<PacketEventsAPI<?>> packetEvents = LazyHolder.simple(() -> SpigotPacketEventsBuilder.build(this));
+    private final LazyHolder<BukkitSenderFactory> senderFactory = LazyHolder.simple(BukkitSenderFactory::new);
+    private final LazyHolder<CommandManager<Sender>> commandManager = LazyHolder.simple(this::createCommandManager);
+    private final LazyHolder<ItemResetHandler> itemResetHandler = LazyHolder.simple(BukkitItemResetHandler::new);
+
+    private final PlatformPlayerFactory playerFactory = new BukkitPlatformPlayerFactory();
+    private final ParserDescriptorFactory parserFactory = new BukkitParserDescriptorFactory();
+    private final PlatformPluginManager platformPluginManager = new BukkitPlatformPluginManager();
+    private final GrimPlugin plugin;
+    private final PlatformServer platformServer = new BukkitPlatformServer();
+    private final MessagePlaceHolderManager messagePlaceHolderManager = new BukkitMessagePlaceHolderManager();
+    private final BukkitPermissionRegistrationManager bukkitPermissionRegistrationManager = new BukkitPermissionRegistrationManager();
+
+    public GrimACBukkitLoaderPlugin() {
+        this.plugin = new BasicGrimPlugin(
+                this.getLogger(),
+                this.getDataFolder(),
+                this.getDescription().getVersion(),
+                this.getDescription().getDescription(),
+                this.getDescription().getAuthors()
+        );
+    }
+
+    @Override
+    public void onLoad() {
+        LOADER = this;
+        GrimAPI.INSTANCE.load(this, this.getBukkitInitTasks());
+    }
+
+    private Initable[] getBukkitInitTasks() {
+        return new Initable[]{
+                new ExemptOnlinePlayersOnReload(),
+                new BukkitEventManager(),
+                new BukkitTickEndEvent(),
+                new BukkitBStats(),
+                (StartableInitable) () -> {
+                    if (MessageUtil.hasPlaceholderAPI) {
+                        new PlaceholderAPIExpansion().register();
+                    }
+                }
+        };
+    }
+
+    @Override
+    public void onEnable() {
+        GrimAPI.INSTANCE.start();
+    }
+
+    @Override
+    public void onDisable() {
+        GrimAPI.INSTANCE.stop();
+    }
+
+    @Override
+    public PlatformScheduler getScheduler() {
+        return scheduler.get();
+    }
+
+    @Override
+    public PlatformPlayerFactory getPlatformPlayerFactory() {
+        return playerFactory;
+    }
+
+    @Override
+    public ParserDescriptorFactory getParserDescriptorFactory() {
+        return parserFactory;
+    }
+
+    @Override
+    public PacketEventsAPI<?> getPacketEvents() {
+        return packetEvents.get();
+    }
+
+    @Override
+    public CommandManager<Sender> getCommandManager() {
+        return commandManager.get();
+    }
+
+    @Override
+    public ItemResetHandler getItemResetHandler() {
+        return itemResetHandler.get();
+    }
+
+    @Override
+    public SenderFactory<CommandSender> getSenderFactory() {
+        return senderFactory.get();
+    }
+
+    @Override
+    public GrimPlugin getPlugin() {
+        return plugin;
+    }
+
+    @Override
+    public PlatformPluginManager getPluginManager() {
+        return platformPluginManager;
+    }
+
+    @Override
+    public PlatformServer getPlatformServer() {
+        return platformServer;
+    }
+
+    @Override
+    public void registerAPIService() {
+        GrimAPIProvider.init(GrimAPI.INSTANCE.getExternalAPI());
+        Bukkit.getServicesManager().register(GrimAbstractAPI.class, GrimAPI.INSTANCE.getExternalAPI(), GrimACBukkitLoaderPlugin.LOADER, ServicePriority.Normal);
+    }
+
+    @Override
+    public @NotNull MessagePlaceHolderManager getMessagePlaceHolderManager() {
+        return messagePlaceHolderManager;
+    }
+
+    @Override
+    public PermissionRegistrationManager getPermissionManager() {
+        return bukkitPermissionRegistrationManager;
+    }
+
+    private PlatformScheduler createScheduler() {
+        return GrimAPI.INSTANCE.getPlatform() == Platform.FOLIA ? new FoliaPlatformScheduler() : new BukkitPlatformScheduler();
+    }
+
+    private CommandManager<Sender> createCommandManager() {
+        LegacyPaperCommandManager<Sender> manager = new LegacyPaperCommandManager<>(
+                this,
+                ExecutionCoordinator.simpleCoordinator(),
+                senderFactory.get()
+        );
+        if (manager.hasCapability(CloudBukkitCapabilities.NATIVE_BRIGADIER)) {
+            manager.registerBrigadier();
+        } else if (manager.hasCapability(CloudBukkitCapabilities.ASYNCHRONOUS_COMPLETION)) {
+            manager.registerAsynchronousCompletions();
+        }
+        return manager;
+    }
+
+    public BukkitSenderFactory getBukkitSenderFactory() {
+        return LOADER.senderFactory.get();
+    }
+}

bukkit/src/main/java/ac/grim/grimac/platform/bukkit/command/BukkitPlayerSelectorAdapter.java

@@ -0,0 +1,37 @@
+package ac.grim.grimac.platform.bukkit.command;
+
+import ac.grim.grimac.GrimAPI;
+import ac.grim.grimac.platform.api.command.PlayerSelector;
+import ac.grim.grimac.platform.api.sender.Sender;
+import ac.grim.grimac.platform.bukkit.sender.BukkitSenderFactory;
+
+import java.util.Collection;
+import java.util.Collections;
+
+public class BukkitPlayerSelectorAdapter implements PlayerSelector {
+    private final org.incendo.cloud.bukkit.data.SinglePlayerSelector bukkitSelector;
+
+    public BukkitPlayerSelectorAdapter(org.incendo.cloud.bukkit.data.SinglePlayerSelector bukkitSelector) {
+        this.bukkitSelector = bukkitSelector;
+    }
+
+    @Override
+    public boolean isSingle() {
+        return true;
+    }
+
+    @Override
+    public Sender getSinglePlayer() {
+        return ((BukkitSenderFactory) GrimAPI.INSTANCE.getSenderFactory()).map(bukkitSelector.single());
+    }
+
+    @Override
+    public Collection<Sender> getPlayers() {
+        return Collections.singletonList(((BukkitSenderFactory) GrimAPI.INSTANCE.getSenderFactory()).map(bukkitSelector.single()));
+    }
+
+    @Override
+    public String inputString() {
+        return bukkitSelector.inputString();
+    }
+}

bukkit/src/main/java/ac/grim/grimac/platform/bukkit/command/BukkitPlayerSelectorParser.java

@@ -0,0 +1,28 @@
+package ac.grim.grimac.platform.bukkit.command;
+
+import ac.grim.grimac.platform.api.command.AbstractPlayerSelectorParser;
+import ac.grim.grimac.platform.api.command.PlayerSelector;
+import org.incendo.cloud.bukkit.parser.selector.SinglePlayerSelectorParser;
+import org.incendo.cloud.context.CommandContext;
+import org.incendo.cloud.parser.ParserDescriptor;
+
+import java.util.concurrent.CompletableFuture;
+
+public class BukkitPlayerSelectorParser<C> extends AbstractPlayerSelectorParser<C> {
+
+    @Override
+    public ParserDescriptor<C, PlayerSelector> descriptor() {
+        return super.createDescriptor();
+    }
+
+    @Override
+    protected ParserDescriptor<C, ?> getPlatformSpecificDescriptor() {
+        return SinglePlayerSelectorParser.singlePlayerSelectorParser();
+    }
+
+    @Override
+    protected CompletableFuture<PlayerSelector> adaptToCommonSelector(CommandContext<C> context, Object platformSpecificSelector) {
+        return CompletableFuture.completedFuture(new BukkitPlayerSelectorAdapter((org.incendo.cloud.bukkit.data.SinglePlayerSelector) platformSpecificSelector));
+    }
+
+}

bukkit/src/main/java/ac/grim/grimac/platform/bukkit/entity/BukkitGrimEntity.java

@@ -0,0 +1,79 @@
+package ac.grim.grimac.platform.bukkit.entity;
+
+import ac.grim.grimac.platform.api.entity.GrimEntity;
+import ac.grim.grimac.platform.api.world.PlatformWorld;
+import ac.grim.grimac.platform.bukkit.utils.convert.BukkitConversionUtils;
+import ac.grim.grimac.platform.bukkit.utils.reflection.PaperUtils;
+import ac.grim.grimac.platform.bukkit.world.BukkitPlatformWorld;
+import ac.grim.grimac.utils.math.Location;
+import com.google.common.base.Preconditions;
+import org.bukkit.entity.Entity;
+import org.checkerframework.checker.nullness.qual.NonNull;
+
+import java.util.UUID;
+import java.util.concurrent.CompletableFuture;
+
+public class BukkitGrimEntity implements GrimEntity {
+
+    private final Entity entity;
+    private BukkitPlatformWorld bukkitPlatformWorld;
+
+    public BukkitGrimEntity(Entity entity) {
+        Preconditions.checkArgument(entity != null);
+        this.entity = entity;
+    }
+
+    public Entity getBukkitEntity() {
+        return this.entity;
+    }
+
+    @Override
+    public UUID getUniqueId() {
+        return entity.getUniqueId();
+    }
+
+    @Override
+    public boolean eject() {
+        return entity.eject();
+    }
+
+    @Override
+    public CompletableFuture<Boolean> teleportAsync(Location location) {
+        org.bukkit.Location bLoc = BukkitConversionUtils.toBukkitLocation(location);
+        return PaperUtils.teleportAsync(this.entity, bLoc);
+    }
+
+    @Override
+    @NonNull
+    public Entity getNative() {
+        return entity;
+    }
+
+    @Override
+    public boolean isDead() {
+        return this.entity.isDead();
+    }
+
+    // TODO replace with PlayerWorldChangeEvent listener instead of checking for equality for better performance
+    @Override
+    public PlatformWorld getWorld() {
+        if (bukkitPlatformWorld == null || !bukkitPlatformWorld.getBukkitWorld().equals(entity.getWorld())) {
+            bukkitPlatformWorld = new BukkitPlatformWorld(entity.getWorld());
+        }
+
+        return bukkitPlatformWorld;
+    }
+
+    @Override
+    public Location getLocation() {
+        org.bukkit.Location location = this.entity.getLocation();
+        return new Location(
+                this.getWorld(),
+                location.getX(),
+                location.getY(),
+                location.getZ(),
+                location.getYaw(),
+                location.getPitch()
+        );
+    }
+}

bukkit/src/main/java/ac/grim/grimac/platform/bukkit/events/PistonEvent.java

@@ -1,8 +1,8 @@
-package ac.grim.grimac.events.bukkit;
+package ac.grim.grimac.platform.bukkit.events;
 
 import ac.grim.grimac.GrimAPI;
+import ac.grim.grimac.platform.bukkit.utils.blockstate.BukkitBlockFaceHelper;
 import ac.grim.grimac.player.GrimPlayer;
-import ac.grim.grimac.utils.blockstate.helper.BlockFaceHelper;
 import ac.grim.grimac.utils.collisions.datatypes.SimpleCollisionBox;
 import ac.grim.grimac.utils.data.PistonData;
 import com.github.retrooper.packetevents.protocol.world.BlockFace;
@@ -57,7 +57,7 @@ public class PistonEvent implements Listener {
 
         for (GrimPlayer player : GrimAPI.INSTANCE.getPlayerDataManager().getEntries()) {
             if (player.compensatedWorld.isChunkLoaded(event.getBlock().getX() >> 4, event.getBlock().getZ() >> 4)) {
-                PistonData data = new PistonData(BlockFaceHelper.fromBukkitFace(event.getDirection()), boxes, player.lastTransactionSent.get(), true, hasSlimeBlock, hasHoneyBlock);
+                PistonData data = new PistonData(BukkitBlockFaceHelper.fromBukkitFace(event.getDirection()), boxes, player.lastTransactionSent.get(), true, hasSlimeBlock, hasHoneyBlock);
                 player.latencyUtils.addRealTimeTaskAsync(player.lastTransactionSent.get(), () -> player.compensatedWorld.activePistons.add(data));
             }
         }
@@ -79,7 +79,7 @@ public class PistonEvent implements Listener {
         boolean hasHoneyBlock = false;
 
         List<SimpleCollisionBox> boxes = new ArrayList<>();
-        BlockFace face = BlockFaceHelper.fromBukkitFace(event.getDirection());
+        BlockFace face = BukkitBlockFaceHelper.fromBukkitFace(event.getDirection());
 
         // The event was called without blocks and is therefore in the right direction
         if (event.getBlocks().isEmpty()) {
@@ -110,7 +110,7 @@ public class PistonEvent implements Listener {
 
         for (GrimPlayer player : GrimAPI.INSTANCE.getPlayerDataManager().getEntries()) {
             if (player.compensatedWorld.isChunkLoaded(event.getBlock().getX() >> 4, event.getBlock().getZ() >> 4)) {
-                PistonData data = new PistonData(BlockFaceHelper.fromBukkitFace(event.getDirection()), boxes, player.lastTransactionSent.get(), false, hasSlimeBlock, hasHoneyBlock);
+                PistonData data = new PistonData(BukkitBlockFaceHelper.fromBukkitFace(event.getDirection()), boxes, player.lastTransactionSent.get(), false, hasSlimeBlock, hasHoneyBlock);
                 player.latencyUtils.addRealTimeTaskAsync(player.lastTransactionSent.get(), () -> player.compensatedWorld.activePistons.add(data));
             }
         }

bukkit/src/main/java/ac/grim/grimac/platform/bukkit/initables/BukkitBStats.java

@@ -0,0 +1,16 @@
+package ac.grim.grimac.platform.bukkit.initables;
+
+import ac.grim.grimac.manager.init.start.StartableInitable;
+import ac.grim.grimac.platform.bukkit.GrimACBukkitLoaderPlugin;
+import io.github.retrooper.packetevents.bstats.bukkit.Metrics;
+
+public class BukkitBStats implements StartableInitable {
+    @Override
+    public void start() {
+        int pluginId = 12820; // <-- Replace with the id of your plugin!
+        try {
+            new Metrics(GrimACBukkitLoaderPlugin.LOADER, pluginId);
+        } catch (Exception ignored) {
+        }
+    }
+}

bukkit/src/main/java/ac/grim/grimac/platform/bukkit/initables/BukkitEventManager.java

@@ -0,0 +1,15 @@
+package ac.grim.grimac.platform.bukkit.initables;
+
+import ac.grim.grimac.manager.init.start.StartableInitable;
+import ac.grim.grimac.platform.bukkit.GrimACBukkitLoaderPlugin;
+import ac.grim.grimac.platform.bukkit.events.PistonEvent;
+import ac.grim.grimac.utils.anticheat.LogUtil;
+import org.bukkit.Bukkit;
+
+public class BukkitEventManager implements StartableInitable {
+    public void start() {
+        LogUtil.info("Registering singular bukkit event... (PistonEvent)");
+
+        Bukkit.getPluginManager().registerEvents(new PistonEvent(), GrimACBukkitLoaderPlugin.LOADER);
+    }
+}

bukkit/src/main/java/ac/grim/grimac/platform/bukkit/initables/BukkitTickEndEvent.java

@@ -0,0 +1,94 @@
+package ac.grim.grimac.platform.bukkit.initables;
+
+import ac.grim.grimac.GrimAPI;
+import ac.grim.grimac.manager.init.start.AbstractTickEndEvent;
+import ac.grim.grimac.platform.api.Platform;
+import ac.grim.grimac.platform.bukkit.player.BukkitPlatformPlayer;
+import ac.grim.grimac.platform.bukkit.utils.reflection.PaperUtils;
+import ac.grim.grimac.player.GrimPlayer;
+import ac.grim.grimac.utils.anticheat.LogUtil;
+import ac.grim.grimac.utils.lists.HookedListWrapper;
+import com.github.retrooper.packetevents.PacketEvents;
+import com.github.retrooper.packetevents.manager.server.ServerVersion;
+import com.github.retrooper.packetevents.util.reflection.Reflection;
+import io.github.retrooper.packetevents.util.SpigotReflectionUtil;
+import org.bukkit.Bukkit;
+import org.bukkit.entity.Player;
+import org.bukkit.event.Listener;
+import sun.misc.Unsafe;
+
+import java.lang.reflect.Field;
+import java.util.Collections;
+import java.util.List;
+
+// Copied from: https://github.com/ThomasOM/Pledge/blob/master/src/main/java/dev/thomazz/pledge/inject/ServerInjector.java
+@SuppressWarnings(value = {"unchecked", "deprecated"})
+public class BukkitTickEndEvent extends AbstractTickEndEvent implements Listener {
+
+    @Override
+    public void start() {
+        if (!super.shouldInjectEndTick()) {
+            return;
+        }
+        if (PacketEvents.getAPI().getServerManager().getVersion().isNewerThan(ServerVersion.V_1_11_2) && !Boolean.getBoolean("paper.explicit-flush")) {
+            LogUtil.warn("Reach.enable-post-packet=true but paper.explicit-flush=false, add \"-Dpaper.explicit-flush=true\" to your server's startup flags for fully functional extra reach accuracy.");
+        }
+        // this is necessary for folia
+        if (GrimAPI.INSTANCE.getPlatform() == Platform.FOLIA) {
+            PaperUtils.registerTickEndEvent(this, this::tickAllFoliaPlayers);
+            return;
+        }
+        // if it fails to inject, try to use paper's event
+        if (!injectWithReflection() && !PaperUtils.registerTickEndEvent(this, this::tickAllPlayers)) {
+            LogUtil.error("Failed to inject into the end of tick event!");
+        }
+    }
+
+    private void tickAllPlayers() {
+        for (GrimPlayer player : GrimAPI.INSTANCE.getPlayerDataManager().getEntries()) {
+            if (player.disableGrim) continue;
+            super.onEndOfTick(player);
+        }
+    }
+
+    private void tickAllFoliaPlayers() {
+        for (GrimPlayer player : GrimAPI.INSTANCE.getPlayerDataManager().getEntries()) {
+            if (player.disableGrim) continue;
+            if (player.platformPlayer == null) continue;
+            Player p = ((BukkitPlatformPlayer) player.platformPlayer).getNative();
+            if (!Bukkit.isOwnedByCurrentRegion(p)) continue;
+            super.onEndOfTick(player);
+        }
+    }
+
+    private boolean injectWithReflection() {
+        // Inject so we can add the final transaction pre-flush event
+        try {
+            Object connection = SpigotReflectionUtil.getMinecraftServerConnectionInstance();
+
+            Field connectionsList = Reflection.getField(connection.getClass(), List.class, 1);
+            List<Object> endOfTickObject = (List<Object>) connectionsList.get(connection);
+
+            // Use a list wrapper to check when the size method is called
+            // Unsure why synchronized is needed because the object itself gets synchronized
+            // but whatever.  At least plugins can't break it, I guess.
+            //
+            // Pledge injects into another list, so we should be safe injecting into this one
+            List<?> wrapper = Collections.synchronizedList(new HookedListWrapper<>(endOfTickObject) {
+                @Override
+                public void onIterator() {
+                    tickAllPlayers();
+                }
+            });
+
+            Field unsafeField = Unsafe.class.getDeclaredField("theUnsafe");
+            unsafeField.setAccessible(true);
+            Unsafe unsafe = (Unsafe) unsafeField.get(null);
+            unsafe.putObject(connection, unsafe.objectFieldOffset(connectionsList), wrapper);
+        } catch (NoSuchFieldException | IllegalAccessException e) {
+            LogUtil.exception("Failed to inject into the end of tick event via reflection", e);
+            return false;
+        }
+        return true;
+    }
+}

bukkit/src/main/java/ac/grim/grimac/platform/bukkit/manager/BukkitItemResetHandler.java

@@ -0,0 +1,100 @@
+package ac.grim.grimac.platform.bukkit.manager;
+
+import ac.grim.grimac.platform.api.manager.ItemResetHandler;
+import ac.grim.grimac.platform.api.player.PlatformPlayer;
+import ac.grim.grimac.platform.bukkit.player.BukkitPlatformPlayer;
+import ac.grim.grimac.platform.bukkit.utils.reflection.PaperUtils;
+import com.github.retrooper.packetevents.PacketEvents;
+import com.github.retrooper.packetevents.manager.server.ServerVersion;
+import lombok.SneakyThrows;
+import org.bukkit.Bukkit;
+import org.bukkit.entity.LivingEntity;
+import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.lang.reflect.Method;
+
+public class BukkitItemResetHandler implements ItemResetHandler {
+    // resets item usage, then returns whether the player was using an item
+    private final @NotNull ItemUsageReset resetItemUsage = createItemUsageResetFunction();
+
+    @SneakyThrows
+    public void resetItemUsage(@Nullable PlatformPlayer player) {
+        if (player != null) {
+            resetItemUsage.accept(((BukkitPlatformPlayer) player).getNative());
+        }
+    }
+
+    @SneakyThrows
+    private @NotNull ItemUsageReset createItemUsageResetFunction() {
+        ServerVersion version = PacketEvents.getAPI().getServerManager().getVersion();
+        if (version.isNewerThan(ServerVersion.V_1_17) && PaperUtils.PAPER) {
+            if (version.isOlderThan(ServerVersion.V_1_19)) {
+                return LivingEntity::clearActiveItem;
+            }
+            Method setLivingEntityFlag = Class.forName(version.isOlderThan(ServerVersion.V_1_20_5) ? "net.minecraft.world.entity.EntityLiving" : "net.minecraft.world.entity.LivingEntity")
+                    .getDeclaredMethod(version.isOlderThan(ServerVersion.V_1_20_5) ? "c" : "setLivingEntityFlag", int.class, boolean.class);
+            Method getHandle = (version.isOlderThan(ServerVersion.V_1_20_5)
+                    ? Class.forName("org.bukkit.craftbukkit." + Bukkit.getServer().getClass().getPackageName().split("\\.")[3] + ".entity.CraftPlayer")
+                    : Class.forName("org.bukkit.craftbukkit.entity.CraftPlayer")
+            ).getMethod("getHandle");
+
+            setLivingEntityFlag.setAccessible(true);
+
+            return player -> {
+                // don't trigger gameevents
+                setLivingEntityFlag.invoke(getHandle.invoke(player), 1, false);
+                player.clearActiveItem();
+            };
+        }
+
+        if (version == ServerVersion.V_1_8_8) {
+            Class<?> EntityHuman = Class.forName("net.minecraft.server.v1_8_R3.EntityHuman");
+            Method getHandle = Class.forName("org.bukkit.craftbukkit.v1_8_R3.entity.CraftPlayer").getMethod("getHandle");
+            Method clearActiveItem = EntityHuman.getMethod("bV");
+            Method isUsingItem = EntityHuman.getMethod("bS");
+
+            return player -> {
+                Object handle = getHandle.invoke(player);
+                clearActiveItem.invoke(handle);
+
+                // in 1.8 we need to resync item usage manually,
+                // only do so if the player was using an item
+                if ((boolean) isUsingItem.invoke(handle)) {
+                    player.updateInventory();
+                }
+            };
+        }
+
+
+
+        String nmsPackage = Bukkit.getServer().getClass().getPackageName().split("\\.")[3];
+        String livingEntityPackage = version.isNewerThan(ServerVersion.V_1_16_5) ? "net.minecraft.world.entity.EntityLiving" : "net.minecraft.server." + nmsPackage + ".EntityLiving";
+
+        Method getHandle = Class.forName("org.bukkit.craftbukkit." + nmsPackage + ".entity.CraftPlayer").getMethod("getHandle");
+        Method clearActiveItem = Class.forName(livingEntityPackage).getMethod(
+                switch (nmsPackage) {
+                    case "v1_9_R1" -> "cz";
+                    case "v1_9_R2" -> "cA";
+                    case "v1_10_R1" -> "cE";
+                    case "v1_11_R1" -> "cF";
+                    case "v1_12_R1" -> "cN";
+                    case "v1_13_R1", "v1_13_R2" -> "da";
+                    case "v1_14_R1" -> "dp";
+                    case "v1_15_R1" -> "dH";
+                    case "v1_16_R1", "v1_16_R2", "v1_16_R3", "v1_17_R1" -> "clearActiveItem";
+                    case "v1_18_R1" -> "eR";
+                    case "v1_18_R2" -> "eS";
+                    default ->
+                            throw new IllegalStateException("You are using an unsupported server version! (" + version.getReleaseName() + ")");
+                }
+        );
+
+        return player -> clearActiveItem.invoke(getHandle.invoke(player));
+    }
+
+    private interface ItemUsageReset {
+        void accept(@NotNull Player player) throws Throwable;
+    }
+}

bukkit/src/main/java/ac/grim/grimac/platform/bukkit/manager/BukkitMessagePlaceHolderManager.java

@@ -0,0 +1,28 @@
+package ac.grim.grimac.platform.bukkit.manager;
+
+import ac.grim.grimac.platform.api.manager.MessagePlaceHolderManager;
+import ac.grim.grimac.platform.api.player.PlatformPlayer;
+import ac.grim.grimac.platform.api.sender.Sender;
+import ac.grim.grimac.platform.bukkit.GrimACBukkitLoaderPlugin;
+import ac.grim.grimac.platform.bukkit.player.BukkitPlatformPlayer;
+import ac.grim.grimac.utils.anticheat.MessageUtil;
+import me.clip.placeholderapi.PlaceholderAPI;
+import org.bukkit.OfflinePlayer;
+import org.bukkit.command.CommandSender;
+import org.checkerframework.checker.nullness.qual.NonNull;
+import org.checkerframework.checker.nullness.qual.Nullable;
+
+public class BukkitMessagePlaceHolderManager implements MessagePlaceHolderManager {
+    @Override
+    public @NonNull String replacePlaceholders(@Nullable Sender sender, @NonNull String string) {
+        if (!MessageUtil.hasPlaceholderAPI) return string;
+        CommandSender commandSender = sender == null ? null : GrimACBukkitLoaderPlugin.LOADER.getBukkitSenderFactory().unwrap(sender);
+        return PlaceholderAPI.setPlaceholders(sender instanceof OfflinePlayer ? (OfflinePlayer) commandSender : null, string);
+    }
+
+    @Override
+    public @NonNull String replacePlaceholders(@Nullable PlatformPlayer object, @NonNull String string) {
+        if (!MessageUtil.hasPlaceholderAPI) return string;
+        return PlaceholderAPI.setPlaceholders(((BukkitPlatformPlayer) object).getBukkitPlayer(), string);
+    }
+}

bukkit/src/main/java/ac/grim/grimac/platform/bukkit/manager/BukkitParserDescriptorFactory.java

@@ -0,0 +1,17 @@
+package ac.grim.grimac.platform.bukkit.manager;
+
+import ac.grim.grimac.platform.api.command.PlayerSelector;
+import ac.grim.grimac.platform.api.manager.ParserDescriptorFactory;
+import ac.grim.grimac.platform.api.sender.Sender;
+import ac.grim.grimac.platform.bukkit.command.BukkitPlayerSelectorParser;
+import org.incendo.cloud.parser.ParserDescriptor;
+
+public class BukkitParserDescriptorFactory implements ParserDescriptorFactory {
+
+    BukkitPlayerSelectorParser<Sender> bukkitPlayerSelectorParser = new BukkitPlayerSelectorParser<>();
+
+    @Override
+    public ParserDescriptor<Sender, PlayerSelector> getSinglePlayer() {
+        return bukkitPlayerSelectorParser.descriptor();
+    }
+}

bukkit/src/main/java/ac/grim/grimac/platform/bukkit/manager/BukkitPermissionRegistrationManager.java

@@ -0,0 +1,33 @@
+package ac.grim.grimac.platform.bukkit.manager;
+
+import ac.grim.grimac.platform.api.manager.PermissionRegistrationManager;
+import ac.grim.grimac.platform.api.permissions.PermissionDefaultValue;
+import ac.grim.grimac.platform.bukkit.utils.convert.BukkitConversionUtils;
+import org.bukkit.Bukkit;
+import org.bukkit.permissions.Permission;
+
+public class BukkitPermissionRegistrationManager implements PermissionRegistrationManager {
+    /**
+     * Registers a permission with the specified default value on Bukkit.
+     * This method is only called for dynamic permissions (e.g., check-specific permissions
+     * like "grim.exempt.checkname") that are generated at runtime. Most other static permissions
+     * (e.g., "grim.exempt", "grim.alerts.enable-on-join") are registered with their defaults
+     * in the `plugin.yml` file, which is defined in the Bukkit Gradle build script.
+     *
+     * <p>Dynamic permissions are registered here to ensure they are available for autocomplete
+     * and permission checks immediately on startup. If the permission already exists, its default
+     * value is updated to match the specified value.</p>
+     *
+     * @param s            The permission node to register (e.g., "grim.exempt.checkname").
+     * @param defaultValue The default value for the permission.
+     */
+    @Override
+    public void registerPermission(String s, PermissionDefaultValue defaultValue) {
+        final Permission permission = Bukkit.getPluginManager().getPermission(s);
+        if (permission == null) {
+            Bukkit.getPluginManager().addPermission(new Permission(s, BukkitConversionUtils.toBukkitPermissionDefault(defaultValue)));
+        } else {
+            permission.setDefault(BukkitConversionUtils.toBukkitPermissionDefault(defaultValue));
+        }
+    }
+}

bukkit/src/main/java/ac/grim/grimac/platform/bukkit/manager/BukkitPlatformPluginManager.java

@@ -0,0 +1,50 @@
+package ac.grim.grimac.platform.bukkit.manager;
+
+import ac.grim.grimac.api.event.EventBus;
+import ac.grim.grimac.api.event.GrimEvent;
+import ac.grim.grimac.api.event.OptimizedEventBus;
+import ac.grim.grimac.platform.api.PlatformPlugin;
+import ac.grim.grimac.platform.api.manager.PlatformPluginManager;
+import ac.grim.grimac.platform.bukkit.BukkitPlatformPlugin;
+import org.bukkit.Bukkit;
+import org.bukkit.plugin.Plugin;
+import org.checkerframework.checker.nullness.qual.Nullable;
+
+public class BukkitPlatformPluginManager implements PlatformPluginManager {
+
+    private final EventBus eventBus = new OptimizedEventBus();
+
+    @Override
+    public void callEvent(GrimEvent event) {
+        eventBus.post(event);
+    }
+
+    @Override
+    public EventBus getEventBus() {
+        return this.eventBus;
+    }
+
+    @Override
+    public PlatformPlugin[] getPlugins() {
+        Plugin[] bukkitPlugins = Bukkit.getPluginManager().getPlugins();
+        PlatformPlugin[] plugins = new PlatformPlugin[bukkitPlugins.length];
+
+        for (int i = 0; i < bukkitPlugins.length; i++) {
+            plugins[i] = new BukkitPlatformPlugin(bukkitPlugins[i]);
+        }
+
+        return plugins;
+    }
+
+    @Override
+    public @Nullable PlatformPlugin getPlugin(String pluginName) {
+        Plugin bukkitPlugin = Bukkit.getPluginManager().getPlugin(pluginName);
+        return bukkitPlugin == null ? null : new BukkitPlatformPlugin(bukkitPlugin);
+    }
+
+    @Override
+    public boolean isPluginEnabled(String pluginName) {
+        PlatformPlugin plugin = getPlugin(pluginName);
+        return plugin != null && plugin.isEnabled();
+    }
+}

bukkit/src/main/java/ac/grim/grimac/platform/bukkit/player/BukkitPlatformInventory.java

@@ -0,0 +1,66 @@
+package ac.grim.grimac.platform.bukkit.player;
+
+import ac.grim.grimac.platform.api.player.PlatformInventory;
+import com.github.retrooper.packetevents.protocol.item.ItemStack;
+import io.github.retrooper.packetevents.util.SpigotConversionUtil;
+import org.bukkit.entity.Player;
+
+public class BukkitPlatformInventory implements PlatformInventory {
+
+    private final Player bukkitPlayer;
+
+    public BukkitPlatformInventory(Player bukkitPlayer) {
+        this.bukkitPlayer = bukkitPlayer;
+    }
+
+    @Override
+    public ItemStack getItemInHand() {
+        return SpigotConversionUtil.fromBukkitItemStack(bukkitPlayer.getInventory().getItemInHand());
+    }
+
+    @Override
+    public ItemStack getItemInOffHand() {
+        return SpigotConversionUtil.fromBukkitItemStack(bukkitPlayer.getInventory().getItemInOffHand());
+    }
+
+    @Override
+    public ItemStack getStack(int bukkitSlot, int vanillaSlot) {
+        return SpigotConversionUtil.fromBukkitItemStack(bukkitPlayer.getInventory().getItem(bukkitSlot));
+    }
+
+    @Override
+    public ItemStack getHelmet() {
+        return SpigotConversionUtil.fromBukkitItemStack(bukkitPlayer.getInventory().getHelmet());
+    }
+
+    @Override
+    public ItemStack getChestplate() {
+        return SpigotConversionUtil.fromBukkitItemStack(bukkitPlayer.getInventory().getHelmet());
+    }
+
+    @Override
+    public ItemStack getLeggings() {
+        return SpigotConversionUtil.fromBukkitItemStack(bukkitPlayer.getInventory().getLeggings());
+    }
+
+    @Override
+    public ItemStack getBoots() {
+        return SpigotConversionUtil.fromBukkitItemStack(bukkitPlayer.getInventory().getBoots());
+    }
+
+    @Override
+    public ItemStack[] getContents() {
+        org.bukkit.inventory.ItemStack[] bukkitItems = bukkitPlayer.getInventory().getContents();
+        ItemStack[] items = new ItemStack[bukkitItems.length];
+        for (int i = 0; i < bukkitItems.length; i++) {
+            if (bukkitItems[i] == null) continue;
+            items[i] = SpigotConversionUtil.fromBukkitItemStack(bukkitItems[i]);
+        }
+        return items;
+    }
+
+    @Override
+    public String getOpenInventoryKey() {
+        return bukkitPlayer.getOpenInventory().getType().toString();
+    }
+}

bukkit/src/main/java/ac/grim/grimac/platform/bukkit/player/BukkitPlatformPlayer.java

@@ -0,0 +1,156 @@
+package ac.grim.grimac.platform.bukkit.player;
+
+import ac.grim.grimac.platform.api.entity.GrimEntity;
+import ac.grim.grimac.platform.api.player.PlatformInventory;
+import ac.grim.grimac.platform.api.player.PlatformPlayer;
+import ac.grim.grimac.platform.api.sender.Sender;
+import ac.grim.grimac.platform.bukkit.GrimACBukkitLoaderPlugin;
+import ac.grim.grimac.platform.bukkit.entity.BukkitGrimEntity;
+import ac.grim.grimac.platform.bukkit.utils.anticheat.MultiLibUtil;
+import ac.grim.grimac.platform.bukkit.utils.convert.BukkitConversionUtils;
+import ac.grim.grimac.platform.bukkit.utils.reflection.PaperUtils;
+import ac.grim.grimac.utils.math.Location;
+import com.github.retrooper.packetevents.protocol.player.GameMode;
+import com.github.retrooper.packetevents.util.Vector3d;
+import lombok.Getter;
+import net.kyori.adventure.platform.bukkit.BukkitAudiences;
+import net.kyori.adventure.text.Component;
+import org.bukkit.World;
+import org.bukkit.entity.Player;
+import org.bukkit.permissions.Permission;
+import org.bukkit.permissions.PermissionDefault;
+import org.checkerframework.checker.nullness.qual.NonNull;
+
+import java.util.UUID;
+import java.util.concurrent.CompletableFuture;
+
+public class BukkitPlatformPlayer extends BukkitGrimEntity implements PlatformPlayer {
+    private static final BukkitAudiences audiences = BukkitAudiences.create(GrimACBukkitLoaderPlugin.LOADER);
+
+    @Getter
+    private final Player bukkitPlayer;
+    private final PlatformInventory inventory;
+
+    public BukkitPlatformPlayer(Player bukkitPlayer) {
+        super(bukkitPlayer);
+        this.bukkitPlayer = bukkitPlayer;
+        this.inventory = new BukkitPlatformInventory(bukkitPlayer);
+    }
+
+    @Override
+    public void kickPlayer(String textReason) {
+        bukkitPlayer.kickPlayer(textReason);
+    }
+
+    @Override
+    public boolean hasPermission(String s) {
+        return bukkitPlayer.hasPermission(s);
+    }
+
+    @Override
+    public boolean hasPermission(String s, boolean defaultIfUnset) {
+        return this.bukkitPlayer.hasPermission(new Permission(s, defaultIfUnset ? PermissionDefault.TRUE : PermissionDefault.FALSE));
+    }
+
+    @Override
+    public boolean isSneaking() {
+        return bukkitPlayer.isSneaking();
+    }
+
+    @Override
+    public void setSneaking(boolean isSneaking) {
+        bukkitPlayer.setSneaking(isSneaking);
+    }
+
+    @Override
+    public void sendMessage(String message) {
+        bukkitPlayer.sendMessage(message);
+    }
+
+    @Override
+    public void sendMessage(Component message) {
+        audiences.player(bukkitPlayer).sendMessage(message);
+    }
+
+    @Override
+    public boolean isOnline() {
+        return bukkitPlayer.isOnline();
+    }
+
+    @Override
+    public String getName() {
+        return bukkitPlayer.getName();
+    }
+
+    @Override
+    public void updateInventory() {
+        bukkitPlayer.updateInventory();
+    }
+
+    @Override
+    public Vector3d getPosition() {
+        org.bukkit.Location location = this.bukkitPlayer.getLocation();
+        return new Vector3d(location.getX(), location.getY(), location.getZ());
+    }
+
+    @Override
+    public PlatformInventory getInventory() {
+        return inventory;
+    }
+
+    @Override
+    public GrimEntity getVehicle() {
+        return new BukkitGrimEntity(bukkitPlayer.getVehicle());
+    }
+
+    @Override
+    public GameMode getGameMode() {
+        return BukkitConversionUtils.fromBukkitGameMode(bukkitPlayer.getGameMode());
+    }
+
+    @Override
+    public void setGameMode(GameMode gameMode) {
+        bukkitPlayer.setGameMode(BukkitConversionUtils.toBukkitGameMode(gameMode));
+    }
+
+    public World getBukkitWorld() {
+        return bukkitPlayer.getWorld();
+    }
+
+    @Override
+    public UUID getUniqueId() {
+        return bukkitPlayer.getUniqueId();
+    }
+
+    @Override
+    public boolean eject() {
+        return bukkitPlayer.eject();
+    }
+
+    @Override
+    public CompletableFuture<Boolean> teleportAsync(Location location) {
+        org.bukkit.Location bLoc = BukkitConversionUtils.toBukkitLocation(location);
+        return PaperUtils.teleportAsync(this.bukkitPlayer, bLoc);
+    }
+
+    @Override
+    public boolean isExternalPlayer() {
+        return MultiLibUtil.isExternalPlayer(this.bukkitPlayer);
+    }
+
+    @Override
+    public void sendPluginMessage(String channelName, byte[] byteArray) {
+        this.bukkitPlayer.sendPluginMessage(GrimACBukkitLoaderPlugin.LOADER, channelName, byteArray);
+    }
+
+    @Override
+    public Sender getSender() {
+        return GrimACBukkitLoaderPlugin.LOADER.getBukkitSenderFactory().map(this.bukkitPlayer);
+    }
+
+    @Override
+    @NonNull
+    public Player getNative() {
+        return this.bukkitPlayer;
+    }
+}

bukkit/src/main/java/ac/grim/grimac/platform/bukkit/player/BukkitPlatformPlayerFactory.java

@@ -0,0 +1,47 @@
+package ac.grim.grimac.platform.bukkit.player;
+
+import ac.grim.grimac.platform.api.player.AbstractPlatformPlayerFactory;
+import ac.grim.grimac.platform.api.player.PlatformPlayer;
+import org.bukkit.Bukkit;
+import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.Collection;
+import java.util.UUID;
+
+
+public class BukkitPlatformPlayerFactory extends AbstractPlatformPlayerFactory<Player> {
+    @Override
+    protected Player getNativePlayer(@NotNull UUID uuid) {
+        return Bukkit.getPlayer(uuid);
+    }
+
+    @Override
+    protected PlatformPlayer createPlatformPlayer(@NotNull Player nativePlayer) {
+        return new BukkitPlatformPlayer(nativePlayer);
+    }
+
+    @Override
+    protected boolean isNativePlayerType(@NotNull Object playerObject) {
+        return playerObject instanceof Player;
+    }
+
+    @Override
+    protected UUID getPlayerUUID(@NotNull Player nativePlayer) {
+        return nativePlayer.getUniqueId();
+    }
+
+    @Override
+    protected Class<Player> getNativePlayerClass() {
+        return Player.class;
+    }
+
+    // The cast is safe because Bukkit.getOnlinePlayers() is guaranteed to contain Player or its subtypes,
+    // and we're only reading from it.
+    @Override
+    @SuppressWarnings("unchecked")
+    protected Collection<Player> getNativeOnlinePlayers() {
+        // Cast Collection<? extends Player> to Collection<Player>
+        return (Collection<Player>) Bukkit.getOnlinePlayers();
+    }
+}

bukkit/src/main/java/ac/grim/grimac/platform/bukkit/scheduler/bukkit/BukkitAsyncScheduler.java

@@ -0,0 +1,54 @@
+package ac.grim.grimac.platform.bukkit.scheduler.bukkit;
+
+import ac.grim.grimac.api.plugin.GrimPlugin;
+import ac.grim.grimac.platform.api.scheduler.AsyncScheduler;
+import ac.grim.grimac.platform.api.scheduler.PlatformScheduler;
+import ac.grim.grimac.platform.api.scheduler.TaskHandle;
+import ac.grim.grimac.platform.bukkit.GrimACBukkitLoaderPlugin;
+import org.bukkit.Bukkit;
+import org.bukkit.scheduler.BukkitScheduler;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.concurrent.TimeUnit;
+
+public class BukkitAsyncScheduler implements AsyncScheduler {
+
+    private final BukkitScheduler bukkitScheduler = Bukkit.getScheduler();
+
+    @Override
+    public TaskHandle runNow(@NotNull GrimPlugin plugin, @NotNull Runnable task) {
+        return new BukkitTaskHandle(bukkitScheduler.runTaskAsynchronously(GrimACBukkitLoaderPlugin.LOADER, task));
+    }
+
+    @Override
+    public TaskHandle runDelayed(@NotNull GrimPlugin plugin, @NotNull Runnable task, long delay, @NotNull TimeUnit timeUnit) {
+        return new BukkitTaskHandle(bukkitScheduler.runTaskLaterAsynchronously(GrimACBukkitLoaderPlugin.LOADER,
+                task,
+                PlatformScheduler.convertTimeToTicks(delay, timeUnit))
+        );
+    }
+
+    @Override
+    public TaskHandle runAtFixedRate(@NotNull GrimPlugin plugin, @NotNull Runnable task, long delay, long period, @NotNull TimeUnit timeUnit) {
+        return new BukkitTaskHandle(
+                bukkitScheduler.runTaskTimerAsynchronously(
+                        GrimACBukkitLoaderPlugin.LOADER,
+                        task,
+                        PlatformScheduler.convertTimeToTicks(delay, timeUnit),
+                        PlatformScheduler.convertTimeToTicks(period, timeUnit)
+                )
+        );
+    }
+
+    @Override
+    public TaskHandle runAtFixedRate(@NotNull GrimPlugin plugin, @NotNull Runnable task, long initialDelayTicks, long periodTicks) {
+        return new BukkitTaskHandle(
+                bukkitScheduler.runTaskTimerAsynchronously(GrimACBukkitLoaderPlugin.LOADER, task, initialDelayTicks, periodTicks)
+        );
+    }
+
+    @Override
+    public void cancel(@NotNull GrimPlugin plugin) {
+        bukkitScheduler.cancelTasks(GrimACBukkitLoaderPlugin.LOADER);
+    }
+}

bukkit/src/main/java/ac/grim/grimac/platform/bukkit/scheduler/bukkit/BukkitEntityScheduler.java

@@ -0,0 +1,36 @@
+package ac.grim.grimac.platform.bukkit.scheduler.bukkit;
+
+import ac.grim.grimac.api.plugin.GrimPlugin;
+import ac.grim.grimac.platform.api.entity.GrimEntity;
+import ac.grim.grimac.platform.api.scheduler.EntityScheduler;
+import ac.grim.grimac.platform.api.scheduler.TaskHandle;
+import ac.grim.grimac.platform.bukkit.GrimACBukkitLoaderPlugin;
+import org.bukkit.Bukkit;
+import org.bukkit.scheduler.BukkitScheduler;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+public class BukkitEntityScheduler implements EntityScheduler {
+
+    private final BukkitScheduler bukkitScheduler = Bukkit.getScheduler();
+
+    @Override
+    public void execute(@NotNull GrimEntity entity, @NotNull GrimPlugin plugin, @NotNull Runnable run, @Nullable Runnable retired, long delay) {
+        bukkitScheduler.runTaskLater(GrimACBukkitLoaderPlugin.LOADER, run, delay);
+    }
+
+    @Override
+    public TaskHandle run(@NotNull GrimEntity entity, @NotNull GrimPlugin plugin, @NotNull Runnable task, @Nullable Runnable retired) {
+        return new BukkitTaskHandle(bukkitScheduler.runTask(GrimACBukkitLoaderPlugin.LOADER, task));
+    }
+
+    @Override
+    public TaskHandle runDelayed(@NotNull GrimEntity entity, @NotNull GrimPlugin plugin, @NotNull Runnable task, @Nullable Runnable retired, long delayTicks) {
+        return new BukkitTaskHandle(bukkitScheduler.runTaskLater(GrimACBukkitLoaderPlugin.LOADER, task, delayTicks));
+    }
+
+    @Override
+    public TaskHandle runAtFixedRate(@NotNull GrimEntity entity, @NotNull GrimPlugin plugin, @NotNull Runnable task, @Nullable Runnable retired, long initialDelayTicks, long periodTicks) {
+        return new BukkitTaskHandle(bukkitScheduler.runTaskTimer(GrimACBukkitLoaderPlugin.LOADER, task, initialDelayTicks, periodTicks));
+    }
+}

bukkit/src/main/java/ac/grim/grimac/platform/bukkit/scheduler/bukkit/BukkitGlobalRegionScheduler.java

@@ -0,0 +1,39 @@
+package ac.grim.grimac.platform.bukkit.scheduler.bukkit;
+
+import ac.grim.grimac.api.plugin.GrimPlugin;
+import ac.grim.grimac.platform.api.scheduler.GlobalRegionScheduler;
+import ac.grim.grimac.platform.api.scheduler.TaskHandle;
+import ac.grim.grimac.platform.bukkit.GrimACBukkitLoaderPlugin;
+import org.bukkit.Bukkit;
+import org.bukkit.scheduler.BukkitScheduler;
+import org.jetbrains.annotations.NotNull;
+
+public class BukkitGlobalRegionScheduler implements GlobalRegionScheduler {
+
+    private final BukkitScheduler bukkitScheduler = Bukkit.getScheduler();
+
+    @Override
+    public void execute(@NotNull GrimPlugin plugin, @NotNull Runnable run) {
+        bukkitScheduler.runTask(GrimACBukkitLoaderPlugin.LOADER, run);
+    }
+
+    @Override
+    public TaskHandle run(@NotNull GrimPlugin plugin, @NotNull Runnable task) {
+        return new BukkitTaskHandle(bukkitScheduler.runTask(GrimACBukkitLoaderPlugin.LOADER, task));
+    }
+
+    @Override
+    public TaskHandle runDelayed(@NotNull GrimPlugin plugin, @NotNull Runnable task, long delay) {
+        return new BukkitTaskHandle(bukkitScheduler.runTaskLater(GrimACBukkitLoaderPlugin.LOADER, task, delay));
+    }
+
+    @Override
+    public TaskHandle runAtFixedRate(@NotNull GrimPlugin plugin, @NotNull Runnable task, long initialDelayTicks, long periodTicks) {
+        return new BukkitTaskHandle(bukkitScheduler.runTaskTimer(GrimACBukkitLoaderPlugin.LOADER, task, initialDelayTicks, periodTicks));
+    }
+
+    @Override
+    public void cancel(@NotNull GrimPlugin plugin) {
+        bukkitScheduler.cancelTasks(GrimACBukkitLoaderPlugin.LOADER);
+    }
+}

bukkit/src/main/java/ac/grim/grimac/platform/bukkit/scheduler/bukkit/BukkitPlatformScheduler.java

@@ -0,0 +1,37 @@
+package ac.grim.grimac.platform.bukkit.scheduler.bukkit;
+
+import ac.grim.grimac.platform.api.scheduler.AsyncScheduler;
+import ac.grim.grimac.platform.api.scheduler.EntityScheduler;
+import ac.grim.grimac.platform.api.scheduler.GlobalRegionScheduler;
+import ac.grim.grimac.platform.api.scheduler.PlatformScheduler;
+import ac.grim.grimac.platform.api.scheduler.RegionScheduler;
+import org.checkerframework.checker.nullness.qual.NonNull;
+import org.jetbrains.annotations.NotNull;
+
+public class BukkitPlatformScheduler implements PlatformScheduler {
+
+    private final BukkitAsyncScheduler bukkitAsyncScheduler = new BukkitAsyncScheduler();
+    private final BukkitGlobalRegionScheduler bukkitGlobalRegionScheduler = new BukkitGlobalRegionScheduler();
+    private final BukkitEntityScheduler bukkitEntityScheduler = new BukkitEntityScheduler();
+    private final BukkitRegionScheduler bukkitRegionScheduler = new BukkitRegionScheduler();
+
+    @Override
+    public @NonNull @NotNull AsyncScheduler getAsyncScheduler() {
+        return bukkitAsyncScheduler;
+    }
+
+    @Override
+    public @NonNull @NotNull GlobalRegionScheduler getGlobalRegionScheduler() {
+        return bukkitGlobalRegionScheduler;
+    }
+
+    @Override
+    public @NonNull @NotNull EntityScheduler getEntityScheduler() {
+        return bukkitEntityScheduler;
+    }
+
+    @Override
+    public @NonNull @NotNull RegionScheduler getRegionScheduler() {
+        return bukkitRegionScheduler;
+    }
+}

bukkit/src/main/java/ac/grim/grimac/platform/bukkit/scheduler/bukkit/BukkitRegionScheduler.java

@@ -0,0 +1,56 @@
+package ac.grim.grimac.platform.bukkit.scheduler.bukkit;
+
+import ac.grim.grimac.api.plugin.GrimPlugin;
+import ac.grim.grimac.platform.api.scheduler.RegionScheduler;
+import ac.grim.grimac.platform.api.scheduler.TaskHandle;
+import ac.grim.grimac.platform.api.world.PlatformWorld;
+import ac.grim.grimac.platform.bukkit.GrimACBukkitLoaderPlugin;
+import ac.grim.grimac.utils.math.Location;
+import org.bukkit.Bukkit;
+import org.bukkit.scheduler.BukkitScheduler;
+import org.jetbrains.annotations.NotNull;
+
+public class BukkitRegionScheduler implements RegionScheduler {
+
+    private final BukkitScheduler bukkitScheduler = Bukkit.getScheduler();
+
+    @Override
+    public void execute(@NotNull GrimPlugin plugin, @NotNull PlatformWorld world, int chunkX, int chunkZ, @NotNull Runnable run) {
+        bukkitScheduler.runTask(GrimACBukkitLoaderPlugin.LOADER, run);
+    }
+
+    @Override
+    public void execute(@NotNull GrimPlugin plugin, @NotNull Location location, @NotNull Runnable run) {
+        bukkitScheduler.runTask(GrimACBukkitLoaderPlugin.LOADER, run);
+    }
+
+    @Override
+    public TaskHandle run(@NotNull GrimPlugin plugin, @NotNull PlatformWorld world, int chunkX, int chunkZ, @NotNull Runnable task) {
+        return new BukkitTaskHandle(bukkitScheduler.runTask(GrimACBukkitLoaderPlugin.LOADER, task));
+    }
+
+    @Override
+    public TaskHandle run(@NotNull GrimPlugin plugin, @NotNull Location location, @NotNull Runnable task) {
+        return new BukkitTaskHandle(bukkitScheduler.runTask(GrimACBukkitLoaderPlugin.LOADER, task));
+    }
+
+    @Override
+    public TaskHandle runDelayed(@NotNull GrimPlugin plugin, @NotNull PlatformWorld world, int chunkX, int chunkZ, @NotNull Runnable task, long delayTicks) {
+        return new BukkitTaskHandle(bukkitScheduler.runTaskLater(GrimACBukkitLoaderPlugin.LOADER, task, delayTicks));
+    }
+
+    @Override
+    public TaskHandle runDelayed(@NotNull GrimPlugin plugin, @NotNull Location location, @NotNull Runnable task, long delayTicks) {
+        return new BukkitTaskHandle(bukkitScheduler.runTaskLater(GrimACBukkitLoaderPlugin.LOADER, task, delayTicks));
+    }
+
+    @Override
+    public TaskHandle runAtFixedRate(@NotNull GrimPlugin plugin, @NotNull PlatformWorld world, int chunkX, int chunkZ, @NotNull Runnable task, long initialDelayTicks, long periodTicks) {
+        return new BukkitTaskHandle(bukkitScheduler.runTaskTimer(GrimACBukkitLoaderPlugin.LOADER, task, initialDelayTicks, periodTicks));
+    }
+
+    @Override
+    public TaskHandle runAtFixedRate(@NotNull GrimPlugin plugin, @NotNull Location location, @NotNull Runnable task, long initialDelayTicks, long periodTicks) {
+        return new BukkitTaskHandle(bukkitScheduler.runTaskTimer(GrimACBukkitLoaderPlugin.LOADER, task, initialDelayTicks, periodTicks));
+    }
+}

bukkit/src/main/java/ac/grim/grimac/platform/bukkit/scheduler/bukkit/BukkitTaskHandle.java

@@ -0,0 +1,28 @@
+package ac.grim.grimac.platform.bukkit.scheduler.bukkit;
+
+import ac.grim.grimac.platform.api.scheduler.TaskHandle;
+import org.bukkit.scheduler.BukkitTask;
+
+public class BukkitTaskHandle implements TaskHandle {
+
+    private final BukkitTask bukkitTask;
+
+    public BukkitTaskHandle(BukkitTask bukkitTask) {
+        this.bukkitTask = bukkitTask;
+    }
+
+    @Override
+    public boolean isSync() {
+        return bukkitTask.isSync();
+    }
+
+    @Override
+    public boolean getCancelled() {
+        return bukkitTask.isCancelled();
+    }
+
+    @Override
+    public void cancel() {
+        bukkitTask.cancel();
+    }
+}

bukkit/src/main/java/ac/grim/grimac/platform/bukkit/scheduler/folia/FoliaAsyncScheduler.java

@@ -0,0 +1,63 @@
+package ac.grim.grimac.platform.bukkit.scheduler.folia;
+
+import ac.grim.grimac.api.plugin.GrimPlugin;
+import ac.grim.grimac.platform.api.scheduler.AsyncScheduler;
+import ac.grim.grimac.platform.api.scheduler.TaskHandle;
+import ac.grim.grimac.platform.bukkit.GrimACBukkitLoaderPlugin;
+import org.bukkit.Bukkit;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.concurrent.TimeUnit;
+
+public class FoliaAsyncScheduler implements AsyncScheduler {
+
+    private final io.papermc.paper.threadedregions.scheduler.AsyncScheduler asyncScheduler = Bukkit.getAsyncScheduler();
+
+    @Override
+    public TaskHandle runNow(@NotNull GrimPlugin plugin, @NotNull Runnable task) {
+        return new FoliaTaskHandle(asyncScheduler.runNow(GrimACBukkitLoaderPlugin.LOADER, (ignored) -> task.run()));
+    }
+
+    @Override
+    public TaskHandle runDelayed(@NotNull GrimPlugin plugin, @NotNull Runnable task, long delay, @NotNull TimeUnit timeUnit) {
+        return new FoliaTaskHandle(
+                asyncScheduler.runDelayed(
+                        GrimACBukkitLoaderPlugin.LOADER,
+                        (ignored) -> task.run(),
+                        delay,
+                        timeUnit
+                )
+        );
+    }
+
+    @Override
+    public TaskHandle runAtFixedRate(@NotNull GrimPlugin plugin, @NotNull Runnable task, long delay, long period, @NotNull TimeUnit timeUnit) {
+        return new FoliaTaskHandle(
+                asyncScheduler.runAtFixedRate(
+                        GrimACBukkitLoaderPlugin.LOADER,
+                        (ignored) -> task.run(),
+                        delay,
+                        period,
+                        timeUnit
+                )
+        );
+    }
+
+    @Override
+    public TaskHandle runAtFixedRate(@NotNull GrimPlugin plugin, @NotNull Runnable task, long initialDelayTicks, long periodTicks) {
+        return new FoliaTaskHandle(
+                asyncScheduler.runAtFixedRate(
+                        GrimACBukkitLoaderPlugin.LOADER,
+                        (ignored) -> task.run(),
+                        initialDelayTicks * 50,
+                        periodTicks * 50,
+                        TimeUnit.MILLISECONDS
+                )
+        );
+    }
+
+    @Override
+    public void cancel(@NotNull GrimPlugin plugin) {
+        asyncScheduler.cancelTasks(GrimACBukkitLoaderPlugin.LOADER);
+    }
+}

bukkit/src/main/java/ac/grim/grimac/platform/bukkit/scheduler/folia/FoliaEntityScheduler.java

@@ -0,0 +1,43 @@
+package ac.grim.grimac.platform.bukkit.scheduler.folia;
+
+import ac.grim.grimac.api.plugin.GrimPlugin;
+import ac.grim.grimac.platform.api.entity.GrimEntity;
+import ac.grim.grimac.platform.api.scheduler.EntityScheduler;
+import ac.grim.grimac.platform.api.scheduler.TaskHandle;
+import ac.grim.grimac.platform.bukkit.GrimACBukkitLoaderPlugin;
+import ac.grim.grimac.platform.bukkit.entity.BukkitGrimEntity;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+public class FoliaEntityScheduler implements EntityScheduler {
+
+    @Override
+    public void execute(@NotNull GrimEntity entity, @NotNull GrimPlugin plugin, @NotNull Runnable run, @Nullable Runnable retired, long delay) {
+        ((BukkitGrimEntity) entity).getBukkitEntity().getScheduler().execute(GrimACBukkitLoaderPlugin.LOADER, run, () -> {
+        }, delay);
+    }
+
+    @Override
+    public TaskHandle run(@NotNull GrimEntity entity, @NotNull GrimPlugin plugin, @NotNull Runnable task, @Nullable Runnable retired) {
+        return new FoliaTaskHandle(
+                ((BukkitGrimEntity) entity).getBukkitEntity().getScheduler().run(GrimACBukkitLoaderPlugin.LOADER, (ignored) -> task.run(), () -> {
+                })
+        );
+    }
+
+    @Override
+    public TaskHandle runDelayed(@NotNull GrimEntity entity, @NotNull GrimPlugin plugin, @NotNull Runnable task, @Nullable Runnable retired, long delayTicks) {
+        return new FoliaTaskHandle(
+                ((BukkitGrimEntity) entity).getBukkitEntity().getScheduler().runDelayed(GrimACBukkitLoaderPlugin.LOADER, (ignored) -> task.run(), () -> {
+                }, delayTicks)
+        );
+    }
+
+    @Override
+    public TaskHandle runAtFixedRate(@NotNull GrimEntity entity, @NotNull GrimPlugin plugin, @NotNull Runnable task, @Nullable Runnable retired, long initialDelayTicks, long periodTicks) {
+        return new FoliaTaskHandle(
+                ((BukkitGrimEntity) entity).getBukkitEntity().getScheduler().runAtFixedRate(GrimACBukkitLoaderPlugin.LOADER, (ignored) -> task.run(), () -> {
+                }, initialDelayTicks, periodTicks)
+        );
+    }
+}

bukkit/src/main/java/ac/grim/grimac/platform/bukkit/scheduler/folia/FoliaGlobalRegionScheduler.java

@@ -0,0 +1,38 @@
+package ac.grim.grimac.platform.bukkit.scheduler.folia;
+
+import ac.grim.grimac.api.plugin.GrimPlugin;
+import ac.grim.grimac.platform.api.scheduler.GlobalRegionScheduler;
+import ac.grim.grimac.platform.api.scheduler.TaskHandle;
+import ac.grim.grimac.platform.bukkit.GrimACBukkitLoaderPlugin;
+import org.bukkit.Bukkit;
+import org.jetbrains.annotations.NotNull;
+
+public class FoliaGlobalRegionScheduler implements GlobalRegionScheduler {
+
+    private final io.papermc.paper.threadedregions.scheduler.GlobalRegionScheduler globalRegionScheduler = Bukkit.getGlobalRegionScheduler();
+
+    @Override
+    public void execute(@NotNull GrimPlugin plugin, @NotNull Runnable run) {
+        globalRegionScheduler.execute(GrimACBukkitLoaderPlugin.LOADER, run);
+    }
+
+    @Override
+    public TaskHandle run(@NotNull GrimPlugin plugin, @NotNull Runnable task) {
+        return new FoliaTaskHandle(globalRegionScheduler.run(GrimACBukkitLoaderPlugin.LOADER, (ignored) -> task.run()));
+    }
+
+    @Override
+    public TaskHandle runDelayed(@NotNull GrimPlugin plugin, @NotNull Runnable task, long delay) {
+        return new FoliaTaskHandle(globalRegionScheduler.runDelayed(GrimACBukkitLoaderPlugin.LOADER, (ignored) -> task.run(), delay));
+    }
+
+    @Override
+    public TaskHandle runAtFixedRate(@NotNull GrimPlugin plugin, @NotNull Runnable task, long initialDelayTicks, long periodTicks) {
+        return new FoliaTaskHandle(globalRegionScheduler.runAtFixedRate(GrimACBukkitLoaderPlugin.LOADER, (ignored) -> task.run(), initialDelayTicks, periodTicks));
+    }
+
+    @Override
+    public void cancel(@NotNull GrimPlugin plugin) {
+        globalRegionScheduler.cancelTasks(GrimACBukkitLoaderPlugin.LOADER);
+    }
+}

bukkit/src/main/java/ac/grim/grimac/platform/bukkit/scheduler/folia/FoliaPlatformScheduler.java

@@ -0,0 +1,36 @@
+package ac.grim.grimac.platform.bukkit.scheduler.folia;
+
+import ac.grim.grimac.platform.api.scheduler.AsyncScheduler;
+import ac.grim.grimac.platform.api.scheduler.EntityScheduler;
+import ac.grim.grimac.platform.api.scheduler.GlobalRegionScheduler;
+import ac.grim.grimac.platform.api.scheduler.PlatformScheduler;
+import ac.grim.grimac.platform.api.scheduler.RegionScheduler;
+import org.checkerframework.checker.nullness.qual.NonNull;
+
+public class FoliaPlatformScheduler implements PlatformScheduler {
+
+    private final FoliaAsyncScheduler foliaAsyncScheduler = new FoliaAsyncScheduler();
+    private final FoliaGlobalRegionScheduler foliaGlobalRegionScheduler = new FoliaGlobalRegionScheduler();
+    private final FoliaEntityScheduler foliaEntityScheduler = new FoliaEntityScheduler();
+    private final FoliaRegionScheduler foliaRegionScheduler = new FoliaRegionScheduler();
+
+    @Override
+    public @NonNull AsyncScheduler getAsyncScheduler() {
+        return foliaAsyncScheduler;
+    }
+
+    @Override
+    public @NonNull GlobalRegionScheduler getGlobalRegionScheduler() {
+        return foliaGlobalRegionScheduler;
+    }
+
+    @Override
+    public @NonNull EntityScheduler getEntityScheduler() {
+        return foliaEntityScheduler;
+    }
+
+    @Override
+    public @NonNull RegionScheduler getRegionScheduler() {
+        return foliaRegionScheduler;
+    }
+}

bukkit/src/main/java/ac/grim/grimac/platform/bukkit/scheduler/folia/FoliaRegionScheduler.java

@@ -0,0 +1,59 @@
+package ac.grim.grimac.platform.bukkit.scheduler.folia;
+
+import ac.grim.grimac.api.plugin.GrimPlugin;
+import ac.grim.grimac.platform.api.scheduler.RegionScheduler;
+import ac.grim.grimac.platform.api.scheduler.TaskHandle;
+import ac.grim.grimac.platform.api.world.PlatformWorld;
+import ac.grim.grimac.platform.bukkit.GrimACBukkitLoaderPlugin;
+import ac.grim.grimac.platform.bukkit.world.BukkitPlatformWorld;
+import ac.grim.grimac.utils.math.Location;
+import org.bukkit.Bukkit;
+import org.jetbrains.annotations.NotNull;
+
+public class FoliaRegionScheduler implements RegionScheduler {
+
+    private final io.papermc.paper.threadedregions.scheduler.RegionScheduler regionScheduler = Bukkit.getRegionScheduler();
+
+    @Override
+    public void execute(@NotNull GrimPlugin plugin, @NotNull PlatformWorld world, int chunkX, int chunkZ, @NotNull Runnable run) {
+        regionScheduler.execute(GrimACBukkitLoaderPlugin.LOADER, ((BukkitPlatformWorld) world).getBukkitWorld(), chunkX, chunkZ, run);
+    }
+
+    @Override
+    public void execute(@NotNull GrimPlugin plugin, @NotNull Location location, @NotNull Runnable run) {
+        execute(plugin, location.getWorld(), location.getBlockX() >> 4, location.getBlockZ() >> 4, run);
+
+    }
+
+    @Override
+    public TaskHandle run(@NotNull GrimPlugin plugin, @NotNull PlatformWorld world, int chunkX, int chunkZ, @NotNull Runnable task) {
+        return new FoliaTaskHandle(regionScheduler.run(GrimACBukkitLoaderPlugin.LOADER, ((BukkitPlatformWorld) world).getBukkitWorld(), chunkX, chunkZ, (ignored) -> task.run()));
+    }
+
+    @Override
+    public TaskHandle run(@NotNull GrimPlugin plugin, @NotNull Location location, @NotNull Runnable task) {
+        return run(plugin, location.getWorld(), location.getBlockX() >> 4, location.getBlockZ() >> 4, task);
+    }
+
+    @Override
+    public TaskHandle runDelayed(@NotNull GrimPlugin plugin, @NotNull PlatformWorld world, int chunkX, int chunkZ, @NotNull Runnable task, long delayTicks) {
+        return new FoliaTaskHandle(regionScheduler.runDelayed(GrimACBukkitLoaderPlugin.LOADER,
+                ((BukkitPlatformWorld) world).getBukkitWorld(), chunkX, chunkZ, (ignored) -> task.run(), delayTicks));
+    }
+
+    @Override
+    public TaskHandle runDelayed(@NotNull GrimPlugin plugin, @NotNull Location location, @NotNull Runnable task, long delayTicks) {
+        return runDelayed(plugin, location.getWorld(), location.getBlockX() >> 4, location.getBlockZ() >> 4, task, delayTicks);
+    }
+
+    @Override
+    public TaskHandle runAtFixedRate(@NotNull GrimPlugin plugin, @NotNull PlatformWorld world, int chunkX, int chunkZ, @NotNull Runnable task, long initialDelayTicks, long periodTicks) {
+        return new FoliaTaskHandle(regionScheduler.runAtFixedRate(GrimACBukkitLoaderPlugin.LOADER,
+                ((BukkitPlatformWorld) world).getBukkitWorld(), chunkX, chunkZ, (ignored) -> task.run(), initialDelayTicks, periodTicks));
+    }
+
+    @Override
+    public TaskHandle runAtFixedRate(@NotNull GrimPlugin plugin, @NotNull Location location, @NotNull Runnable task, long initialDelayTicks, long periodTicks) {
+        return runAtFixedRate(plugin, location.getWorld(), location.getBlockX() >> 4, location.getBlockZ() >> 4, task, initialDelayTicks, periodTicks);
+    }
+}

bukkit/src/main/java/ac/grim/grimac/platform/bukkit/scheduler/folia/FoliaTaskHandle.java

@@ -0,0 +1,28 @@
+package ac.grim.grimac.platform.bukkit.scheduler.folia;
+
+import ac.grim.grimac.platform.api.scheduler.TaskHandle;
+import io.papermc.paper.threadedregions.scheduler.ScheduledTask;
+
+public class FoliaTaskHandle implements TaskHandle {
+
+    private final ScheduledTask task;
+
+    public FoliaTaskHandle(ScheduledTask task) {
+        this.task = task;
+    }
+
+    @Override
+    public boolean isSync() {
+        return false;
+    }
+
+    @Override
+    public boolean getCancelled() {
+        return task.isCancelled();
+    }
+
+    @Override
+    public void cancel() {
+        task.cancel();
+    }
+}

bukkit/src/main/java/ac/grim/grimac/platform/bukkit/sender/BukkitSenderFactory.java

@@ -0,0 +1,89 @@
+package ac.grim.grimac.platform.bukkit.sender;
+
+import ac.grim.grimac.GrimAPI;
+import ac.grim.grimac.platform.api.sender.Sender;
+import ac.grim.grimac.platform.api.sender.SenderFactory;
+import ac.grim.grimac.platform.bukkit.GrimACBukkitLoaderPlugin;
+import net.kyori.adventure.platform.bukkit.BukkitAudiences;
+import net.kyori.adventure.text.Component;
+import org.bukkit.command.CommandSender;
+import org.bukkit.command.ConsoleCommandSender;
+import org.bukkit.command.RemoteConsoleCommandSender;
+import org.bukkit.entity.Player;
+import org.bukkit.permissions.Permission;
+import org.bukkit.permissions.PermissionDefault;
+import org.checkerframework.checker.nullness.qual.NonNull;
+import org.incendo.cloud.SenderMapper;
+
+import java.util.UUID;
+
+public class BukkitSenderFactory extends SenderFactory<CommandSender> implements SenderMapper<CommandSender, Sender> {
+    private final BukkitAudiences audiences;
+
+    public BukkitSenderFactory() {
+        this.audiences = BukkitAudiences.create(GrimACBukkitLoaderPlugin.LOADER);
+    }
+
+    @Override
+    protected String getName(CommandSender sender) {
+        return sender instanceof Player ? sender.getName() : Sender.CONSOLE_NAME;
+    }
+
+    @Override
+    protected UUID getUniqueId(CommandSender sender) {
+        return sender instanceof Player ? ((Player) sender).getUniqueId() : Sender.CONSOLE_UUID;
+    }
+
+    @Override
+    protected void sendMessage(CommandSender sender, String message) {
+        sender.sendMessage(message);
+    }
+
+    @Override
+    protected void sendMessage(CommandSender sender, Component message) {
+        // we can safely send async for players and the console - otherwise, send it sync
+        if (sender instanceof Player || sender instanceof ConsoleCommandSender || sender instanceof RemoteConsoleCommandSender) {
+            this.audiences.sender(sender).sendMessage(message);
+        } else {
+            GrimAPI.INSTANCE.getScheduler().getGlobalRegionScheduler().run(
+                    GrimAPI.INSTANCE.getGrimPlugin(),
+                    () -> this.audiences.sender(sender).sendMessage(message)
+            );
+        }
+    }
+
+    @Override
+    protected boolean hasPermission(CommandSender sender, String node) {
+        return sender.hasPermission(node);
+    }
+
+    @Override
+    protected boolean hasPermission(CommandSender sender, String node, boolean defaultIfUnset) {
+        return sender.hasPermission(new Permission(node, defaultIfUnset ? PermissionDefault.TRUE : PermissionDefault.FALSE));
+    }
+
+    @Override
+    protected void performCommand(CommandSender sender, String command) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    protected boolean isConsole(CommandSender sender) {
+        return sender instanceof ConsoleCommandSender || sender instanceof RemoteConsoleCommandSender;
+    }
+
+    @Override
+    protected boolean isPlayer(CommandSender sender) {
+        return sender instanceof Player;
+    }
+
+    @Override
+    public @NonNull Sender map(@NonNull CommandSender base) {
+        return this.wrap(base);
+    }
+
+    @Override
+    public @NonNull CommandSender reverse(@NonNull Sender mapped) {
+        return this.unwrap(mapped);
+    }
+}

bukkit/src/main/java/ac/grim/grimac/platform/bukkit/utils/anticheat/MultiLibUtil.java

@@ -1,4 +1,4 @@
-package ac.grim.grimac.utils.anticheat;
+package ac.grim.grimac.platform.bukkit.utils.anticheat;
 
 import com.github.retrooper.packetevents.PacketEvents;
 import com.github.retrooper.packetevents.manager.server.ServerVersion;
@@ -9,6 +9,8 @@ import java.lang.reflect.Method;
 public class MultiLibUtil {
 
     public final static Method externalPlayerMethod = getMethod(Player.class, "isExternalPlayer");
+    private static final boolean
+        IS_PRE_1_18 = PacketEvents.getAPI().getServerManager().getVersion().isOlderThan(ServerVersion.V_1_18);
 
     public static Method getMethod(Class<?> clazz, String methodName) {
         try {
@@ -20,7 +22,7 @@ public class MultiLibUtil {
 
     // TODO: cache external players for better performance, but this only matters for people using multi-lib
     public static boolean isExternalPlayer(Player player) {
-        if (externalPlayerMethod == null || (PacketEvents.getAPI().getServerManager().getVersion().isOlderThan(ServerVersion.V_1_18))) return false;
+        if (externalPlayerMethod == null || IS_PRE_1_18) return false;
         try {
             return (boolean) externalPlayerMethod.invoke(player);
         } catch (Exception e) {

bukkit/src/main/java/ac/grim/grimac/platform/bukkit/utils/blockstate/BukkitBlockFaceHelper.java

@@ -0,0 +1,22 @@
+package ac.grim.grimac.platform.bukkit.utils.blockstate;
+
+import com.github.retrooper.packetevents.protocol.world.BlockFace;
+
+public class BukkitBlockFaceHelper {
+    /**
+     * For use with bukkit events only
+     * Grim is not meant to be restrained by bukkit!
+     */
+    @Deprecated
+    public static BlockFace fromBukkitFace(org.bukkit.block.BlockFace face) {
+        return switch (face) {
+            case NORTH -> BlockFace.NORTH;
+            case SOUTH -> BlockFace.SOUTH;
+            case WEST -> BlockFace.WEST;
+            case EAST -> BlockFace.EAST;
+            case UP -> BlockFace.UP;
+            case DOWN -> BlockFace.DOWN;
+            default -> BlockFace.OTHER;
+        };
+    }
+}

bukkit/src/main/java/ac/grim/grimac/platform/bukkit/utils/convert/BukkitConversionUtils.java

@@ -0,0 +1,62 @@
+package ac.grim.grimac.platform.bukkit.utils.convert;
+
+import ac.grim.grimac.platform.api.permissions.PermissionDefaultValue;
+import ac.grim.grimac.platform.bukkit.world.BukkitPlatformWorld;
+import ac.grim.grimac.utils.math.Location;
+import com.github.retrooper.packetevents.protocol.player.GameMode;
+
+public class BukkitConversionUtils {
+    public static org.bukkit.Location toBukkitLocation(Location location) {
+        return new org.bukkit.Location(((BukkitPlatformWorld) location.getWorld()).getBukkitWorld(), location.getX(), location.getY(), location.getZ(), location.getYaw(), location.getPitch());
+    }
+
+    public static GameMode fromBukkitGameMode(org.bukkit.GameMode gameMode) {
+        switch (gameMode) {
+            case CREATIVE:
+                return GameMode.CREATIVE;
+            case SURVIVAL:
+                return GameMode.SURVIVAL;
+            case ADVENTURE:
+                return GameMode.ADVENTURE;
+            case SPECTATOR:
+                return GameMode.SPECTATOR;
+            default:
+                throw new IllegalStateException();
+        }
+    }
+
+    public static org.bukkit.GameMode toBukkitGameMode(GameMode gameMode) {
+        switch (gameMode) {
+            case CREATIVE:
+                return org.bukkit.GameMode.CREATIVE;
+            case SURVIVAL:
+                return org.bukkit.GameMode.SURVIVAL;
+            case ADVENTURE:
+                return org.bukkit.GameMode.ADVENTURE;
+            case SPECTATOR:
+                return org.bukkit.GameMode.SPECTATOR;
+            default:
+                throw new IllegalStateException();
+        }
+    }
+
+    /**
+     * Converts this enum to a Bukkit PermissionDefault.
+     *
+     * @return The corresponding Bukkit PermissionDefault.
+     */
+    public static org.bukkit.permissions.PermissionDefault toBukkitPermissionDefault(PermissionDefaultValue permissionDefaultValue) {
+        switch (permissionDefaultValue) {
+            case TRUE:
+                return org.bukkit.permissions.PermissionDefault.TRUE;
+            case FALSE:
+                return org.bukkit.permissions.PermissionDefault.FALSE;
+            case OP:
+                return org.bukkit.permissions.PermissionDefault.OP;
+            case NOT_OP:
+                return org.bukkit.permissions.PermissionDefault.NOT_OP;
+            default:
+                throw new IllegalStateException();
+        }
+    }
+}

bukkit/src/main/java/ac/grim/grimac/platform/bukkit/utils/placeholder/PlaceholderAPIExpansion.java

@@ -0,0 +1,71 @@
+package ac.grim.grimac.platform.bukkit.utils.placeholder;
+
+import ac.grim.grimac.GrimAPI;
+import ac.grim.grimac.api.GrimUser;
+import ac.grim.grimac.player.GrimPlayer;
+import me.clip.placeholderapi.expansion.PlaceholderExpansion;
+import org.bukkit.OfflinePlayer;
+import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.function.Function;
+
+public class PlaceholderAPIExpansion extends PlaceholderExpansion {
+
+    @Override
+    public @NotNull String getIdentifier() {
+        return "grim";
+    }
+
+    public @NotNull String getAuthor() {
+        return String.join(", ", GrimAPI.INSTANCE.getGrimPlugin().getDescription().getAuthors());
+    }
+
+    @Override
+    public @NotNull String getVersion() {
+        return GrimAPI.INSTANCE.getExternalAPI().getGrimVersion();
+    }
+
+    @Override
+    public boolean persist() {
+        return true;
+    }
+
+    @Override
+    public @NotNull List<String> getPlaceholders() {
+        Set<String> placeholders = GrimAPI.INSTANCE.getExternalAPI().getStaticReplacements().keySet();
+        placeholders.addAll(GrimAPI.INSTANCE.getExternalAPI().getVariableReplacements().keySet());
+        return List.copyOf(placeholders);
+    }
+
+    @Override
+    public String onRequest(OfflinePlayer offlinePlayer, @NotNull String params) {
+        for (Map.Entry<String, String> entry : GrimAPI.INSTANCE.getExternalAPI().getStaticReplacements().entrySet()) {
+            String key = entry.getKey().equals("%grim_version%")
+                    ? "version"
+                    : entry.getKey().replaceAll("%", "");
+            if (params.equalsIgnoreCase(key)) {
+                return entry.getValue();
+            }
+        }
+
+        if (offlinePlayer instanceof Player player) {
+            GrimPlayer grimPlayer = GrimAPI.INSTANCE.getPlayerDataManager().getPlayer(player.getUniqueId());
+            if (grimPlayer == null) return null;
+
+            for (Map.Entry<String, Function<GrimUser, String>> entry : GrimAPI.INSTANCE.getExternalAPI().getVariableReplacements().entrySet()) {
+                String key = entry.getKey().equals("%player%")
+                        ? "player"
+                        : "player_" + entry.getKey().replaceAll("%", "");
+                if (params.equalsIgnoreCase(key)) {
+                    return entry.getValue().apply(grimPlayer);
+                }
+            }
+        }
+
+        return null;
+    }
+}

bukkit/src/main/java/ac/grim/grimac/platform/bukkit/utils/reflection/PaperUtils.java

@@ -0,0 +1,52 @@
+package ac.grim.grimac.platform.bukkit.utils.reflection;
+
+import ac.grim.grimac.platform.bukkit.GrimACBukkitLoaderPlugin;
+import ac.grim.grimac.utils.anticheat.LogUtil;
+import ac.grim.grimac.utils.reflection.ReflectionUtils;
+import org.bukkit.Location;
+import org.bukkit.entity.Entity;
+import org.bukkit.event.Event;
+import org.bukkit.event.EventPriority;
+import org.bukkit.event.Listener;
+
+import java.util.concurrent.CompletableFuture;
+
+public class PaperUtils {
+
+    public static final boolean PAPER;
+    public static final boolean TICK_END_EVENT;
+    public static final boolean ASYNC_TELEPORT;
+
+    static {
+        PAPER = ReflectionUtils.hasClass("com.destroystokyo.paper.PaperConfig") || ReflectionUtils.hasClass("io.papermc.paper.configuration.Configuration");
+        TICK_END_EVENT = ReflectionUtils.hasClass("com.destroystokyo.paper.event.server.ServerTickEndEvent");
+        ASYNC_TELEPORT = ReflectionUtils.hasMethod(Entity.class, "teleportAsync", org.bukkit.Location.class);
+    }
+
+    public static CompletableFuture<Boolean> teleportAsync(final Entity entity, final Location location) {
+        if (PAPER) {
+            return entity.teleportAsync(location);
+        } else {
+            return CompletableFuture.completedFuture(entity.teleport(location));
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    public static boolean registerTickEndEvent(Listener listener, Runnable runnable) {
+        if (TICK_END_EVENT) {
+            try {
+                Class<?> clazz = ReflectionUtils.getClass("com.destroystokyo.paper.event.server.ServerTickEndEvent");
+                if (clazz == null) return false;
+                GrimACBukkitLoaderPlugin.LOADER.getServer().getPluginManager().registerEvent((Class<? extends Event>) clazz,
+                        listener,
+                        EventPriority.NORMAL,
+                        (l, event) -> runnable.run(), GrimACBukkitLoaderPlugin.LOADER);
+                return true;
+            } catch (Exception e) {
+                LogUtil.exception("Failed to register tick end event", e);
+            }
+        }
+        return false;
+    }
+
+}

bukkit/src/main/java/ac/grim/grimac/platform/bukkit/world/BukkitPlatformChunk.java

@@ -0,0 +1,31 @@
+package ac.grim.grimac.platform.bukkit.world;
+
+import ac.grim.grimac.platform.api.world.PlatformChunk;
+import com.github.retrooper.packetevents.PacketEvents;
+import com.github.retrooper.packetevents.manager.server.ServerVersion;
+import com.github.retrooper.packetevents.protocol.world.states.WrappedBlockState;
+import org.bukkit.Chunk;
+import org.bukkit.block.Block;
+import org.bukkit.block.data.BlockData;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.HashMap;
+
+public class BukkitPlatformChunk implements PlatformChunk {
+    private static final HashMap<BlockData, Integer> blockDataToId = new HashMap<>();
+    private static final boolean isFlat = PacketEvents.getAPI().getServerManager().getVersion().isNewerThanOrEquals(ServerVersion.V_1_13);
+    private final Chunk chunk;
+
+    public BukkitPlatformChunk(@NotNull Chunk chunkAt) {
+        this.chunk = chunkAt;
+    }
+
+    @Override
+    public int getBlockID(int x, int y, int z) {
+        Block block = chunk.getBlock(x, y, z);
+
+        return isFlat // Cache blockDataToID because Strings are expensive
+                ? blockDataToId.computeIfAbsent(block.getBlockData(), data -> WrappedBlockState.getByString(PacketEvents.getAPI().getServerManager().getVersion().toClientVersion(), data.getAsString(false)).getGlobalId())
+                : (block.getType().getId() << 4) | block.getData();
+    }
+}

bukkit/src/main/java/ac/grim/grimac/platform/bukkit/world/BukkitPlatformWorld.java

@@ -0,0 +1,53 @@
+package ac.grim.grimac.platform.bukkit.world;
+
+import ac.grim.grimac.platform.api.world.PlatformChunk;
+import ac.grim.grimac.platform.api.world.PlatformWorld;
+import com.github.retrooper.packetevents.protocol.world.states.WrappedBlockState;
+import io.github.retrooper.packetevents.util.SpigotConversionUtil;
+import lombok.Getter;
+import org.bukkit.Bukkit;
+import org.bukkit.World;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.UUID;
+
+@Getter
+public class BukkitPlatformWorld implements PlatformWorld {
+
+    private final World bukkitWorld;
+
+    public BukkitPlatformWorld(@NotNull World world) {
+        this.bukkitWorld = world;
+    }
+
+    @Override
+    public boolean isChunkLoaded(int chunkX, int chunkZ) {
+        return bukkitWorld.isChunkLoaded(chunkX, chunkZ);
+    }
+
+    @Override
+    public WrappedBlockState getBlockAt(int x, int y, int z) {
+        return SpigotConversionUtil.fromBukkitBlockData(bukkitWorld.getBlockAt(x, y, z).getBlockData());
+    }
+
+    @Override
+    public String getName() {
+        return bukkitWorld.getName();
+    }
+
+    @Override
+    public @Nullable UUID getUID() {
+        return this.bukkitWorld.getUID();
+    }
+
+    @Override
+    public PlatformChunk getChunkAt(int currChunkX, int currChunkZ) {
+        return new BukkitPlatformChunk(bukkitWorld.getChunkAt(currChunkX, currChunkZ));
+    }
+
+    @Override
+    public boolean isLoaded() {
+        return Bukkit.getWorld(bukkitWorld.getUID()) != null;
+    }
+}

common/build.gradle.kts

@@ -0,0 +1,54 @@
+plugins {
+    `maven-publish`
+    grim.`base-conventions`
+}
+
+repositories {
+    mavenLocal()
+    maven {
+        name = "papermc"
+        url = uri("https://repo.papermc.io/repository/maven-public/")
+    }
+    maven("https://hub.spigotmc.org/nexus/content/repositories/snapshots/") // Spigot
+    maven("https://jitpack.io/") { // Grim API
+        content {
+            includeGroup("com.github.grimanticheat")
+        }
+    }
+    maven("https://repo.viaversion.com") // ViaVersion
+    maven("https://nexus.scarsz.me/content/repositories/releases") // Configuralize
+    maven("https://repo.opencollab.dev/maven-snapshots/") // Floodgate
+    maven("https://repo.opencollab.dev/maven-releases/") // Cumulus (for Floodgate)
+    maven("https://repo.codemc.io/repository/maven-releases/") // PacketEvents
+    maven("https://repo.codemc.io/repository/maven-snapshots/")
+    maven("https://s01.oss.sonatype.org/content/repositories/snapshots/")
+    mavenCentral()
+    // FastUtil, Discord-Webhooks
+}
+
+dependencies {
+    api(libs.packetevents.api)
+    api(libs.cloud.core)
+    api("org.incendo:cloud-processors-requirements:1.0.0-rc.1")
+    api("github.scarsz:configuralize:1.4.1:slim") {
+        exclude(group = "org.yaml", module = "snakeyaml")
+    }
+    // Bump snakeyaml (transitive dep of configuralize) 1.29 -> 2.2 for geyser-fabric
+    api("org.yaml:snakeyaml:2.2")
+    api(libs.discord.webhooks)
+    api(libs.fastutil)
+    api(libs.adventure.text.minimessage)
+    api(libs.jetbrains.annotations)
+
+    // Used for local testing:
+    // api("ac.grim.grimac:GrimAPI:1.0")
+    api("com.github.grimanticheat:grimapi:8507e14a73")
+
+    compileOnly(libs.floodgate.api)
+    compileOnly(libs.via.version.api)
+    compileOnly(libs.netty)
+}
+
+publishing.publications.create<MavenPublication>("maven") {
+    from(components["java"])
+}

common/src/main/java/ac/grim/grimac/GrimAPI.java

@@ -0,0 +1,141 @@
+package ac.grim.grimac;
+
+import ac.grim.grimac.api.plugin.GrimPlugin;
+import ac.grim.grimac.manager.AlertManagerImpl;
+import ac.grim.grimac.manager.DiscordManager;
+import ac.grim.grimac.manager.InitManager;
+import ac.grim.grimac.manager.SpectateManager;
+import ac.grim.grimac.manager.TickManager;
+import ac.grim.grimac.manager.config.BaseConfigManager;
+import ac.grim.grimac.manager.init.Initable;
+import ac.grim.grimac.platform.api.Platform;
+import ac.grim.grimac.platform.api.PlatformLoader;
+import ac.grim.grimac.platform.api.PlatformServer;
+import ac.grim.grimac.platform.api.manager.ItemResetHandler;
+import ac.grim.grimac.platform.api.manager.MessagePlaceHolderManager;
+import ac.grim.grimac.platform.api.manager.ParserDescriptorFactory;
+import ac.grim.grimac.platform.api.manager.PermissionRegistrationManager;
+import ac.grim.grimac.platform.api.manager.PlatformPluginManager;
+import ac.grim.grimac.platform.api.player.PlatformPlayerFactory;
+import ac.grim.grimac.platform.api.scheduler.PlatformScheduler;
+import ac.grim.grimac.platform.api.sender.SenderFactory;
+import ac.grim.grimac.utils.anticheat.PlayerDataManager;
+import ac.grim.grimac.utils.reflection.ReflectionUtils;
+import lombok.Getter;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+
+@Getter
+public final class GrimAPI {
+    public static final GrimAPI INSTANCE = new GrimAPI();
+
+    private final Platform platform = detectPlatform();
+    private final BaseConfigManager configManager;
+    private final AlertManagerImpl alertManager;
+    private final SpectateManager spectateManager;
+    private final DiscordManager discordManager;
+    private final PlayerDataManager playerDataManager;
+    private final TickManager tickManager;
+    private final GrimExternalAPI externalAPI;
+    private PlatformLoader loader;
+    private InitManager initManager;
+    private boolean initialized = false;
+
+    private GrimAPI() {
+        this.configManager = new BaseConfigManager();
+        this.alertManager = new AlertManagerImpl();
+        this.spectateManager = new SpectateManager();
+        this.discordManager = new DiscordManager();
+        this.playerDataManager = new PlayerDataManager();
+        this.tickManager = new TickManager();
+        this.externalAPI = new GrimExternalAPI(this);
+    }
+
+    private static Platform detectPlatform() {
+        final Map<String, Platform> platforms = Collections.unmodifiableMap(new HashMap<>() {{
+            put("io.papermc.paper.threadedregions.RegionizedServer", Platform.FOLIA);
+            put("org.bukkit.Bukkit", Platform.BUKKIT);
+            put("net.fabricmc.loader.api.FabricLoader", Platform.FABRIC);
+        }});
+
+        return platforms.entrySet().stream()
+                .filter(entry -> ReflectionUtils.hasClass(entry.getKey()))
+                .map(Map.Entry::getValue)
+                .findFirst()
+                .orElseThrow(() -> new IllegalStateException("Unknown platform!"));
+    }
+
+    public void load(PlatformLoader platformLoader, Initable... platformSpecificInitables) {
+        this.loader = platformLoader;
+        this.initManager = new InitManager(loader.getPacketEvents(), loader::getCommandManager, platformSpecificInitables);
+        this.initManager.load();
+        this.initialized = true;
+    }
+
+    public void start() {
+        checkInitialized();
+        initManager.start();
+    }
+
+    public void stop() {
+        checkInitialized();
+        initManager.stop();
+    }
+
+    public PlatformScheduler getScheduler() {
+        return loader.getScheduler();
+    }
+
+    public PlatformPlayerFactory getPlatformPlayerFactory() {
+        return loader.getPlatformPlayerFactory();
+    }
+
+    public ParserDescriptorFactory getParserDescriptors() {
+        return loader.getParserDescriptorFactory();
+    }
+
+    public InitManager getInitManager() {
+        return initManager;
+    }
+
+    public GrimPlugin getGrimPlugin() {
+        return loader.getPlugin();
+    }
+
+    public SenderFactory<?> getSenderFactory() {
+        return loader.getSenderFactory();
+    }
+
+    public ItemResetHandler getItemResetHandler() {
+        return loader.getItemResetHandler();
+    }
+
+    public PlatformPluginManager getPluginManager() {
+        return loader.getPluginManager();
+    }
+
+    public PlatformServer getPlatformServer() {
+        return loader.getPlatformServer();
+    }
+
+    public @NotNull MessagePlaceHolderManager getMessagePlaceHolderManager() {
+        return loader.getMessagePlaceHolderManager();
+    }
+
+    private void checkInitialized() {
+        if (!initialized) {
+            throw new IllegalStateException("GrimAPI has not been initialized!");
+        }
+    }
+
+    public PermissionRegistrationManager getPermissionManager() {
+        return loader.getPermissionManager();
+    }
+
+    public Platform getPlatform() {
+        return platform;
+    }
+}

common/src/main/java/ac/grim/grimac/GrimExternalAPI.java

@@ -0,0 +1,218 @@
+package ac.grim.grimac;
+
+import ac.grim.grimac.api.GrimAbstractAPI;
+import ac.grim.grimac.api.plugin.GrimPluginDescription;
+import ac.grim.grimac.api.GrimUser;
+import ac.grim.grimac.api.alerts.AlertManager;
+import ac.grim.grimac.api.config.ConfigManager;
+import ac.grim.grimac.api.event.EventBus;
+import ac.grim.grimac.api.event.events.GrimReloadEvent;
+import ac.grim.grimac.manager.config.ConfigManagerFileImpl;
+import ac.grim.grimac.manager.init.start.StartableInitable;
+import ac.grim.grimac.player.GrimPlayer;
+import ac.grim.grimac.utils.anticheat.LogUtil;
+import ac.grim.grimac.utils.chat.ChatUtil;
+import ac.grim.grimac.utils.common.ConfigReloadObserver;
+import com.github.retrooper.packetevents.netty.channel.ChannelHelper;
+import lombok.Getter;
+import org.checkerframework.checker.nullness.qual.NonNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.Map;
+import java.util.UUID;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.function.Function;
+
+//This is used for grim's external API. It has its own class just for organization.
+
+public class GrimExternalAPI implements GrimAbstractAPI, ConfigReloadObserver, StartableInitable {
+
+    private final GrimAPI api;
+    @Getter
+    private final Map<String, Function<GrimUser, String>> variableReplacements = new ConcurrentHashMap<>();
+    @Getter
+    private final Map<String, String> staticReplacements = new ConcurrentHashMap<>();
+    private final Map<String, Function<Object, Object>> functions = new ConcurrentHashMap<>();
+    private final ConfigManagerFileImpl configManagerFile = new ConfigManagerFileImpl();
+    private ConfigManager configManager = null;
+    private boolean started = false;
+
+    public GrimExternalAPI(GrimAPI api) {
+        this.api = api;
+    }
+
+    @Override
+    public @NonNull EventBus getEventBus() {
+        return api.getPluginManager().getEventBus();
+    }
+
+    @Override
+    public @Nullable GrimUser getGrimUser(UUID uuid) {
+        return api.getPlayerDataManager().getPlayer(uuid);
+    }
+
+    public String replaceVariables(GrimUser user, String content) {
+        for (Map.Entry<String, String> entry : staticReplacements.entrySet()) {
+            content = content.replace(entry.getKey(), entry.getValue());
+        }
+        for (Map.Entry<String, Function<GrimUser, String>> entry : variableReplacements.entrySet()) {
+            content = content.replace(entry.getKey(), entry.getValue().apply(user));
+        }
+        return content;
+    }
+
+    @Override
+    public void registerVariable(String string, Function<GrimUser, String> replacement) {
+        if (replacement == null) {
+            variableReplacements.remove(string);
+        } else {
+            variableReplacements.put(string, replacement);
+        }
+    }
+
+    @Override
+    public void registerVariable(String variable, String replacement) {
+        if (replacement == null) {
+            staticReplacements.remove(variable);
+        } else {
+            staticReplacements.put(variable, replacement);
+        }
+    }
+
+    @Override
+    public String getGrimVersion() {
+        GrimPluginDescription description = GrimAPI.INSTANCE.getGrimPlugin().getDescription();
+        return description.getVersion();
+    }
+
+    @Override
+    public void registerFunction(String key, Function<Object, Object> function) {
+        if (function == null) {
+            functions.remove(key);
+        } else {
+            functions.put(key, function);
+        }
+    }
+
+    @Override
+    public Function<Object, Object> getFunction(String key) {
+        return functions.get(key);
+    }
+
+    @Override
+    public AlertManager getAlertManager() {
+        return GrimAPI.INSTANCE.getAlertManager();
+    }
+
+    @Override
+    public ConfigManager getConfigManager() {
+        return configManager;
+    }
+
+    @Override
+    public boolean hasStarted() {
+        return started;
+    }
+
+    @Override
+    public int getCurrentTick() {
+        return GrimAPI.INSTANCE.getTickManager().currentTick;
+    }
+
+    // on load, load the config & register the service
+    public void load() {
+        reload(configManagerFile);
+        api.getLoader().registerAPIService();
+    }
+
+    // handles any config loading that's needed to be done after load
+    @Override
+    public void start() {
+        started = true;
+        try {
+            GrimAPI.INSTANCE.getConfigManager().start();
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Override
+    public void reload(ConfigManager config) {
+        if (config.isLoadedAsync() && started) {
+            GrimAPI.INSTANCE.getScheduler().getAsyncScheduler().runNow(GrimAPI.INSTANCE.getGrimPlugin(),
+                    () -> successfulReload(config));
+        } else {
+            successfulReload(config);
+        }
+    }
+
+    @Override
+    public CompletableFuture<Boolean> reloadAsync(ConfigManager config) {
+        if (config.isLoadedAsync() && started) {
+            CompletableFuture<Boolean> future = new CompletableFuture<>();
+            GrimAPI.INSTANCE.getScheduler().getAsyncScheduler().runNow(GrimAPI.INSTANCE.getGrimPlugin(),
+                    () -> future.complete(successfulReload(config)));
+            return future;
+        }
+        return CompletableFuture.completedFuture(successfulReload(config));
+    }
+
+    private boolean successfulReload(ConfigManager config) {
+        try {
+            config.reload();
+            GrimAPI.INSTANCE.getConfigManager().load(config);
+            if (started) GrimAPI.INSTANCE.getConfigManager().start();
+            onReload(config);
+            if (started)
+                GrimAPI.INSTANCE.getScheduler().getAsyncScheduler().runNow(GrimAPI.INSTANCE.getGrimPlugin(),
+                        () -> GrimAPI.INSTANCE.getPluginManager().callEvent(new GrimReloadEvent(true)));
+            return true;
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+        if (started)
+            GrimAPI.INSTANCE.getScheduler().getAsyncScheduler().runNow(GrimAPI.INSTANCE.getGrimPlugin(),
+                    () -> GrimAPI.INSTANCE.getPluginManager().callEvent(new GrimReloadEvent(false)));
+        return false;
+    }
+
+    @Override
+    public void onReload(ConfigManager newConfig) {
+        if (newConfig == null) {
+            LogUtil.warn("ConfigManager not set. Using default config file manager.");
+            configManager = configManagerFile;
+        } else {
+            configManager = newConfig;
+        }
+        // Update variables
+        updateVariables();
+        // Restart
+        GrimAPI.INSTANCE.getDiscordManager().reload();
+        GrimAPI.INSTANCE.getSpectateManager().reload();
+        // Don't reload players if the plugin hasn't started yet
+        if (!started) return;
+        // Reload checks for all players
+        for (GrimPlayer grimPlayer : GrimAPI.INSTANCE.getPlayerDataManager().getEntries()) {
+            ChannelHelper.runInEventLoop(grimPlayer.user.getChannel(), () -> {
+                grimPlayer.updatePermissions();
+                grimPlayer.reload(configManager);
+            });
+        }
+    }
+
+    private void updateVariables() {
+        variableReplacements.putIfAbsent("%player%", GrimUser::getName);
+        variableReplacements.putIfAbsent("%uuid%", user -> user.getUniqueId().toString());
+        variableReplacements.putIfAbsent("%ping%", user -> user.getTransactionPing() + "");
+        variableReplacements.putIfAbsent("%brand%", GrimUser::getBrand);
+        variableReplacements.putIfAbsent("%h_sensitivity%", user -> ((int) Math.round(user.getHorizontalSensitivity() * 200)) + "");
+        variableReplacements.putIfAbsent("%v_sensitivity%", user -> ((int) Math.round(user.getVerticalSensitivity() * 200)) + "");
+        variableReplacements.putIfAbsent("%fast_math%", user -> !user.isVanillaMath() + "");
+        variableReplacements.putIfAbsent("%tps%", user -> String.format("%.2f", GrimAPI.INSTANCE.getPlatformServer().getTPS()));
+        variableReplacements.putIfAbsent("%version%", GrimUser::getVersionName);
+        // static variables
+        staticReplacements.put("%prefix%", ChatUtil.translateAlternateColorCodes('&', GrimAPI.INSTANCE.getConfigManager().getPrefix()));
+        staticReplacements.putIfAbsent("%grim_version%", getGrimVersion());
+    }
+}

common/src/main/java/ac/grim/grimac/checks/Check.java

@@ -0,0 +1,209 @@
+package ac.grim.grimac.checks;
+
+import ac.grim.grimac.GrimAPI;
+import ac.grim.grimac.api.AbstractCheck;
+import ac.grim.grimac.api.config.ConfigManager;
+import ac.grim.grimac.api.event.events.FlagEvent;
+import ac.grim.grimac.player.GrimPlayer;
+import com.github.retrooper.packetevents.protocol.packettype.PacketType;
+import com.github.retrooper.packetevents.protocol.packettype.PacketTypeCommon;
+import com.github.retrooper.packetevents.protocol.player.ClientVersion;
+import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientPlayerFlying;
+import com.google.common.base.Preconditions;
+import lombok.Getter;
+import lombok.Setter;
+import org.checkerframework.checker.nullness.qual.NonNull;
+import org.jetbrains.annotations.NotNull;
+
+// Class from https://github.com/Tecnio/AntiCheatBase/blob/master/src/main/java/me/tecnio/anticheat/check/Check.java
+@Getter
+public class Check extends GrimProcessor implements AbstractCheck {
+    protected @NonNull final GrimPlayer player;
+
+    public double violations;
+    private double decay;
+    private double setbackVL;
+
+    private String checkName;
+    private String configName;
+    private String alternativeName;
+    private String displayName;
+    private String description;
+
+    private boolean experimental;
+    private @Setter boolean isEnabled;
+
+    private boolean exemptPermission;
+    private boolean noSetbackPermission;
+    private boolean noModifyPacketPermission;
+    private long lastViolationTime;
+
+    public Check(final @NotNull GrimPlayer player) {
+        Preconditions.checkArgument(player != null);
+        this.player = player;
+
+        final CheckData checkData = this.getClass().getAnnotation(CheckData.class);
+        if (checkData != null) {
+            this.checkName = checkData.name();
+            this.configName = checkData.configName();
+            // Fall back to check name
+            if (this.configName.equals("DEFAULT")) this.configName = this.checkName;
+            this.decay = checkData.decay();
+            this.setbackVL = checkData.setback();
+            this.alternativeName = checkData.alternativeName();
+            this.experimental = checkData.experimental();
+            this.description = checkData.description();
+            this.displayName = this.checkName;
+        }
+
+        reload();
+    }
+
+    public boolean shouldModifyPackets() {
+        return isEnabled && !player.disableGrim && !player.noModifyPacketPermission && !exemptPermission;
+    }
+
+    public void updatePermissions() {
+        if (player.platformPlayer == null || configName == null) return;
+        GrimAPI.INSTANCE.getScheduler().getEntityScheduler().run(
+                player.platformPlayer,
+                GrimAPI.INSTANCE.getGrimPlugin(),
+                () -> {
+                    final String id = configName.toLowerCase();
+                    exemptPermission = player.platformPlayer.hasPermission("grim.exempt." + id);
+                    noSetbackPermission = player.platformPlayer.hasPermission("grim.nosetback." + id);
+                    noModifyPacketPermission = player.platformPlayer.hasPermission("grim.nomodifypacket." + id);
+                },
+                () -> {}
+        );
+    }
+
+    public final boolean flagAndAlert(String verbose) {
+        if (flag(verbose)) {
+            alert(verbose);
+            return true;
+        }
+        return false;
+    }
+
+    public final boolean flagAndAlert() {
+        return flagAndAlert("");
+    }
+
+    public final boolean flag() {
+        return flag("");
+    }
+
+    public final boolean flag(String verbose) {
+        if (player.disableGrim || (experimental && !player.isExperimentalChecks()) || exemptPermission)
+            return false; // Avoid calling event if disabled
+
+        FlagEvent event = new FlagEvent(player, this, verbose);
+        GrimAPI.INSTANCE.getPluginManager().callEvent(event);
+        if (event.isCancelled()) return false;
+
+        player.punishmentManager.handleViolation(this);
+        lastViolationTime = System.currentTimeMillis();
+        violations++;
+        return true;
+    }
+
+    public final boolean flagWithSetback() {
+        if (flag()) {
+            setbackIfAboveSetbackVL();
+            return true;
+        }
+        return false;
+    }
+
+    public final boolean flagAndAlertWithSetback() {
+        return flagAndAlertWithSetback("");
+    }
+
+    public final boolean flagAndAlertWithSetback(String verbose) {
+        if (flagAndAlert(verbose)) {
+            setbackIfAboveSetbackVL();
+            return true;
+        }
+        return false;
+    }
+
+    public final void reward() {
+        violations = Math.max(0, violations - decay);
+    }
+
+    @Override
+    public void reload(ConfigManager configuration) {
+        decay = configuration.getDoubleElse(configName + ".decay", decay);
+        setbackVL = configuration.getDoubleElse(configName + ".setbackvl", setbackVL);
+        displayName = configuration.getStringElse(configName + ".displayname", checkName);
+        description = configuration.getStringElse(configName + ".description", description);
+
+        if (setbackVL == -1) setbackVL = Double.MAX_VALUE;
+        updatePermissions();
+        onReload(configuration);
+    }
+
+    @Override
+    public void onReload(ConfigManager config) {
+
+    }
+
+    public boolean alert(String verbose) {
+        return player.punishmentManager.handleAlert(player, verbose, this);
+    }
+
+    public boolean setbackIfAboveSetbackVL() {
+        if (shouldSetback()) {
+            return player.getSetbackTeleportUtil().executeViolationSetback();
+        }
+        return false;
+    }
+
+    public boolean shouldSetback() {
+        return !noSetbackPermission && violations > setbackVL;
+    }
+
+    public String formatOffset(double offset) {
+        return offset > 0.001 ? String.format("%.5f", offset) : String.format("%.2E", offset);
+    }
+
+    public boolean isTransaction(PacketTypeCommon packetType) {
+        return packetType == PacketType.Play.Client.PONG ||
+                packetType == PacketType.Play.Client.WINDOW_CONFIRMATION;
+    }
+
+    public boolean isFlying(PacketTypeCommon packetType) {
+        return WrapperPlayClientPlayerFlying.isFlying(packetType);
+    }
+
+    public boolean isUpdate(PacketTypeCommon packetType) {
+        return isFlying(packetType)
+                || packetType == PacketType.Play.Client.CLIENT_TICK_END
+                || isTransaction(packetType);
+    }
+
+    public boolean isTickPacket(PacketTypeCommon packetType) {
+        if (isTickPacketIncludingNonMovement(packetType)) {
+            if (isFlying(packetType)) {
+                return !player.packetStateData.lastPacketWasTeleport && !player.packetStateData.lastPacketWasOnePointSeventeenDuplicate;
+            }
+            return true;
+        }
+        return false;
+    }
+
+    public boolean isTickPacketIncludingNonMovement(PacketTypeCommon packetType) {
+        // On 1.21.2+ fall back to the TICK_END packet IF the player did not send a movement packet for their tick
+        // TickTimer checks to see if player did not send a tick end packet before new flying packet is sent
+        if (player.getClientVersion().isNewerThanOrEquals(ClientVersion.V_1_21_2)
+                && !player.packetStateData.didSendMovementBeforeTickEnd) {
+            if (packetType == PacketType.Play.Client.CLIENT_TICK_END) {
+                return true;
+            }
+        }
+
+        return isFlying(packetType);
+    }
+
+}

common/src/main/java/ac/grim/grimac/checks/GrimProcessor.java

@@ -0,0 +1,17 @@
+package ac.grim.grimac.checks;
+
+import ac.grim.grimac.GrimAPI;
+import ac.grim.grimac.api.AbstractProcessor;
+import ac.grim.grimac.api.config.ConfigReloadable;
+import ac.grim.grimac.utils.common.ConfigReloadObserver;
+
+public abstract class GrimProcessor implements AbstractProcessor, ConfigReloadable, ConfigReloadObserver {
+
+    // Not everything has to be a check for it to process packets & be configurable
+
+    @Override
+    public void reload() {
+        reload(GrimAPI.INSTANCE.getConfigManager().getConfig());
+    }
+
+}

common/src/main/java/ac/grim/grimac/checks/impl/aim/AimDuplicateLook.java

@@ -8,15 +8,15 @@ import ac.grim.grimac.utils.anticheat.update.RotationUpdate;
 
 @CheckData(name = "AimDuplicateLook")
 public class AimDuplicateLook extends Check implements RotationCheck {
+    boolean exempt = false;
+
     public AimDuplicateLook(GrimPlayer playerData) {
         super(playerData);
     }
 
-    boolean exempt = false;
-
     @Override
     public void process(final RotationUpdate rotationUpdate) {
-        if (player.packetStateData.lastPacketWasTeleport || player.packetStateData.lastPacketWasOnePointSeventeenDuplicate || player.compensatedEntities.getSelf().getRiding() != null) {
+        if (player.packetStateData.lastPacketWasTeleport || player.packetStateData.lastPacketWasOnePointSeventeenDuplicate || player.compensatedEntities.self.getRiding() != null) {
             exempt = true;
             return;
         }

common/src/main/java/ac/grim/grimac/checks/impl/aim/AimModulo360.java

@@ -11,7 +11,8 @@ import ac.grim.grimac.utils.anticheat.update.RotationUpdate;
 // It works on clients who % 360 their rotation.
 @CheckData(name = "AimModulo360", decay = 0.005)
 public class AimModulo360 extends Check implements RotationCheck {
-    float lastDeltaYaw;
+
+    private float lastDeltaYaw;
 
     public AimModulo360(GrimPlayer playerData) {
         super(playerData);
@@ -19,12 +20,20 @@ public class AimModulo360 extends Check implements RotationCheck {
 
     @Override
     public void process(final RotationUpdate rotationUpdate) {
-        lastDeltaYaw = rotationUpdate.getDeltaXRot();
-        if (player.packetStateData.lastPacketWasTeleport) return;
+        // Exempt for teleport, entering a vehicle due to rotation reset or
+        // after forced, client-sided rotation change after interacting with a horse (not necessarily mounting it)
+        if (player.packetStateData.lastPacketWasTeleport || player.vehicleData.wasVehicleSwitch
+                || player.packetStateData.horseInteractCausedForcedRotation) {
+            lastDeltaYaw = rotationUpdate.getDeltaXRot();
+            return;
+        }
+
         if (player.xRot < 360 && player.xRot > -360 && Math.abs(rotationUpdate.getDeltaXRot()) > 320 && Math.abs(lastDeltaYaw) < 30) {
             flagAndAlert();
         } else {
             reward();
         }
+
+        lastDeltaYaw = rotationUpdate.getDeltaXRot();
     }
 }

common/src/main/java/ac/grim/grimac/checks/impl/aim/processor/AimProcessor.java

@@ -13,26 +13,26 @@ public class AimProcessor extends Check implements RotationCheck {
 
     private static final int SIGNIFICANT_SAMPLES_THRESHOLD = 15;
     private static final int TOTAL_SAMPLES_THRESHOLD = 80;
+    public double sensitivityX;
+    public double sensitivityY;
+    public double divisorX;
+    public double divisorY;
+    public double modeX, modeY;
+    public double deltaDotsX, deltaDotsY;
+    RunningMode xRotMode = new RunningMode(TOTAL_SAMPLES_THRESHOLD);
+    RunningMode yRotMode = new RunningMode(TOTAL_SAMPLES_THRESHOLD);
+    float lastXRot;
+    float lastYRot;
 
     public AimProcessor(GrimPlayer playerData) {
         super(playerData);
     }
 
-    RunningMode xRotMode = new RunningMode(TOTAL_SAMPLES_THRESHOLD);
-    RunningMode yRotMode = new RunningMode(TOTAL_SAMPLES_THRESHOLD);
-
-    float lastXRot;
-    float lastYRot;
-
-    public double sensitivityX;
-    public double sensitivityY;
-
-    public double divisorX;
-    public double divisorY;
-
-    public double modeX, modeY;
-
-    public double deltaDotsX, deltaDotsY;
+    public static double convertToSensitivity(double var13) {
+        double var11 = var13 / 0.15F / 8.0D;
+        double var9 = Math.cbrt(var11);
+        return (var9 - 0.2f) / 0.6f;
+    }
 
     @Override
     public void process(final RotationUpdate rotationUpdate) {
@@ -59,15 +59,15 @@ public class AimProcessor extends Check implements RotationCheck {
 
         if (this.xRotMode.size() > SIGNIFICANT_SAMPLES_THRESHOLD) {
             Pair<Double, Integer> modeX = this.xRotMode.getMode();
-            if (modeX.getSecond() > SIGNIFICANT_SAMPLES_THRESHOLD) {
-                this.modeX = modeX.getFirst();
+            if (modeX.second() > SIGNIFICANT_SAMPLES_THRESHOLD) {
+                this.modeX = modeX.first();
                 this.sensitivityX = convertToSensitivity(this.modeX);
             }
         }
         if (this.yRotMode.size() > SIGNIFICANT_SAMPLES_THRESHOLD) {
             Pair<Double, Integer> modeY = this.yRotMode.getMode();
-            if (modeY.getSecond() > SIGNIFICANT_SAMPLES_THRESHOLD) {
-                this.modeY = modeY.getFirst();
+            if (modeY.second() > SIGNIFICANT_SAMPLES_THRESHOLD) {
+                this.modeY = modeY.first();
                 this.sensitivityY = convertToSensitivity(this.modeY);
             }
         }
@@ -75,10 +75,4 @@ public class AimProcessor extends Check implements RotationCheck {
         this.deltaDotsX = deltaXRot / modeX;
         this.deltaDotsY = deltaYRot / modeY;
     }
-
-    public static double convertToSensitivity(double var13) {
-        double var11 = var13 / 0.15F / 8.0D;
-        double var9 = Math.cbrt(var11);
-        return (var9 - 0.2f) / 0.6f;
-    }
-}
+}

common/src/main/java/ac/grim/grimac/checks/impl/badpackets/BadPacketsA.java

@@ -8,7 +8,7 @@ import com.github.retrooper.packetevents.event.PacketReceiveEvent;
 import com.github.retrooper.packetevents.protocol.packettype.PacketType;
 import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientHeldItemChange;
 
-@CheckData(name = "BadPacketsA")
+@CheckData(name = "BadPacketsA", description = "Sent duplicate slot id")
 public class BadPacketsA extends Check implements PacketCheck {
     int lastSlot = -1;
 

common/src/main/java/ac/grim/grimac/checks/impl/badpackets/BadPacketsC.java

@@ -6,9 +6,10 @@ import ac.grim.grimac.checks.type.PacketCheck;
 import ac.grim.grimac.player.GrimPlayer;
 import com.github.retrooper.packetevents.event.PacketReceiveEvent;
 import com.github.retrooper.packetevents.protocol.packettype.PacketType;
+import com.github.retrooper.packetevents.protocol.player.GameMode;
 import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientInteractEntity;
 
-@CheckData(name = "BadPacketsC")
+@CheckData(name = "BadPacketsC", description = "Interacted with self")
 public class BadPacketsC extends Check implements PacketCheck {
     public BadPacketsC(GrimPlayer player) {
         super(player);
@@ -17,6 +18,7 @@ public class BadPacketsC extends Check implements PacketCheck {
     @Override
     public void onPacketReceive(PacketReceiveEvent event) {
         if (event.getPacketType() == PacketType.Play.Client.INTERACT_ENTITY) {
+            if (player.gamemode == GameMode.SPECTATOR) return;
             if (new WrapperPlayClientInteractEntity(event).getEntityId() == player.entityID) {
                 // Instant ban
                 if (flagAndAlert() && shouldModifyPackets()) {

common/src/main/java/ac/grim/grimac/checks/impl/badpackets/BadPacketsD.java

@@ -8,7 +8,7 @@ import com.github.retrooper.packetevents.event.PacketReceiveEvent;
 import com.github.retrooper.packetevents.protocol.packettype.PacketType;
 import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientPlayerFlying;
 
-@CheckData(name = "BadPacketsD")
+@CheckData(name = "BadPacketsD", description = "Impossible pitch")
 public class BadPacketsD extends Check implements PacketCheck {
     public BadPacketsD(GrimPlayer player) {
         super(player);

common/src/main/java/ac/grim/grimac/checks/impl/badpackets/BadPacketsE.java

@@ -4,8 +4,11 @@ import ac.grim.grimac.checks.Check;
 import ac.grim.grimac.checks.CheckData;
 import ac.grim.grimac.checks.type.PacketCheck;
 import ac.grim.grimac.player.GrimPlayer;
+import com.github.retrooper.packetevents.PacketEvents;
 import com.github.retrooper.packetevents.event.PacketReceiveEvent;
+import com.github.retrooper.packetevents.manager.server.ServerVersion;
 import com.github.retrooper.packetevents.protocol.packettype.PacketType;
+import com.github.retrooper.packetevents.protocol.player.ClientVersion;
 import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientPlayerFlying;
 
 @CheckData(name = "BadPacketsE")
@@ -18,12 +21,14 @@ public class BadPacketsE extends Check implements PacketCheck {
 
     @Override
     public void onPacketReceive(PacketReceiveEvent event) {
+        final boolean isViaPleaseStopUsingProtocolHacksOnYourServer = player.getClientVersion().isNewerThanOrEquals(ClientVersion.V_1_21_2) || PacketEvents.getAPI().getServerManager().getVersion().isNewerThanOrEquals(ServerVersion.V_1_21_2);
         if (event.getPacketType() == PacketType.Play.Client.PLAYER_POSITION_AND_ROTATION ||
                 event.getPacketType() == PacketType.Play.Client.PLAYER_POSITION) {
             noReminderTicks = 0;
         } else if (WrapperPlayClientPlayerFlying.isFlying(event.getPacketType())) {
             noReminderTicks++;
-        } else if (event.getPacketType() == PacketType.Play.Client.STEER_VEHICLE) {
+        } else if (event.getPacketType() == PacketType.Play.Client.STEER_VEHICLE
+                || (isViaPleaseStopUsingProtocolHacksOnYourServer && player.inVehicle())) {
             noReminderTicks = 0; // Exempt vehicles
         }
 

common/src/main/java/ac/grim/grimac/checks/impl/badpackets/BadPacketsF.java

@@ -8,7 +8,7 @@ import com.github.retrooper.packetevents.event.PacketReceiveEvent;
 import com.github.retrooper.packetevents.protocol.packettype.PacketType;
 import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientEntityAction;
 
-@CheckData(name = "BadPacketsF")
+@CheckData(name = "BadPacketsF", description = "Sent duplicate sprinting status")
 public class BadPacketsF extends Check implements PacketCheck {
     public boolean lastSprinting;
     public boolean exemptNext = true; // Support 1.14+ clients starting on either true or false sprinting, we don't know

common/src/main/java/ac/grim/grimac/checks/impl/badpackets/BadPacketsG.java

@@ -8,10 +8,9 @@ import com.github.retrooper.packetevents.event.PacketReceiveEvent;
 import com.github.retrooper.packetevents.protocol.packettype.PacketType;
 import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientEntityAction;
 
-@CheckData(name = "BadPacketsG")
+@CheckData(name = "BadPacketsG", description = "Sent duplicate sneaking status")
 public class BadPacketsG extends Check implements PacketCheck {
-    boolean wasTeleport;
-    boolean lastSneaking;
+    private boolean lastSneaking, respawn;
 
     public BadPacketsG(GrimPlayer player) {
         super(player);
@@ -19,13 +18,12 @@ public class BadPacketsG extends Check implements PacketCheck {
 
     @Override
     public void onPacketReceive(PacketReceiveEvent event) {
-        wasTeleport = player.packetStateData.lastPacketWasTeleport || wasTeleport;
-
         if (event.getPacketType() == PacketType.Play.Client.ENTITY_ACTION) {
             WrapperPlayClientEntityAction packet = new WrapperPlayClientEntityAction(event);
 
             if (packet.getAction() == WrapperPlayClientEntityAction.Action.START_SNEAKING) {
-                if (lastSneaking && !wasTeleport) {
+                // The player may send two START_SNEAKING packets if they respawned
+                if (lastSneaking && !respawn) {
                     if (flagAndAlert("state=true") && shouldModifyPackets()) {
                         event.setCancelled(true);
                         player.onPacketCancel();
@@ -33,8 +31,9 @@ public class BadPacketsG extends Check implements PacketCheck {
                 } else {
                     lastSneaking = true;
                 }
+                respawn = false;
             } else if (packet.getAction() == WrapperPlayClientEntityAction.Action.STOP_SNEAKING) {
-                if (!lastSneaking && !wasTeleport) {
+                if (!lastSneaking && !respawn) {
                     if (flagAndAlert("state=false") && shouldModifyPackets()) {
                         event.setCancelled(true);
                         player.onPacketCancel();
@@ -42,7 +41,13 @@ public class BadPacketsG extends Check implements PacketCheck {
                 } else {
                     lastSneaking = false;
                 }
+                respawn = false;
             }
         }
     }
+
+    public void handleRespawn() {
+        // Clients could potentially not send a STOP_SNEAKING packet when they die, so we need to track it
+        respawn = true;
+    }
 }

common/src/main/java/ac/grim/grimac/checks/impl/badpackets/BadPacketsH.java

@@ -10,9 +10,8 @@ import com.github.retrooper.packetevents.manager.server.ServerVersion;
 import com.github.retrooper.packetevents.protocol.packettype.PacketType;
 import com.github.retrooper.packetevents.protocol.player.ClientVersion;
 import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientInteractEntity;
-import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientPlayerFlying;
 
-@CheckData(name = "BadPacketsH")
+@CheckData(name = "BadPacketsH", description = "Did not swing for attack")
 public class BadPacketsH extends Check implements PacketCheck {
 
     // 1.9 packet order: INTERACT -> ANIMATION
@@ -42,9 +41,10 @@ public class BadPacketsH extends Check implements PacketCheck {
             // I will simply disable this check for 1.8- clients on 1.9+ servers as I can't be bothered to find a way around this.
             // Stop supporting such old clients on modern servers!
             if (player.getClientVersion().isOlderThan(ClientVersion.V_1_9)
-                    && PacketEvents.getAPI().getServerManager().getVersion().isNewerThan(ServerVersion.V_1_8)) return;
+                    && PacketEvents.getAPI().getServerManager().getVersion().isNewerThanOrEquals(ServerVersion.V_1_9))
+                return;
 
-            if (!sentAnimation && flagAndAlert()) {
+            if (!sentAnimation && flagAndAlert() && shouldModifyPackets()) {
                 event.setCancelled(true);
                 player.onPacketCancel();
             }

common/src/main/java/ac/grim/grimac/checks/impl/badpackets/BadPacketsI.java

@@ -8,7 +8,7 @@ import com.github.retrooper.packetevents.event.PacketReceiveEvent;
 import com.github.retrooper.packetevents.protocol.packettype.PacketType;
 import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientPlayerAbilities;
 
-@CheckData(name = "BadPacketsI")
+@CheckData(name = "BadPacketsI", description = "Claimed to be flying while unable to fly")
 public class BadPacketsI extends Check implements PacketCheck {
     public BadPacketsI(GrimPlayer player) {
         super(player);

common/src/main/java/ac/grim/grimac/checks/impl/badpackets/BadPacketsK.java

@@ -8,7 +8,7 @@ import com.github.retrooper.packetevents.event.PacketReceiveEvent;
 import com.github.retrooper.packetevents.protocol.packettype.PacketType;
 import com.github.retrooper.packetevents.protocol.player.GameMode;
 
-@CheckData(name = "BadPacketsK")
+@CheckData(name = "BadPacketsK", description = "Sent spectate packets while not in spectator mode")
 public class BadPacketsK extends Check implements PacketCheck {
     public BadPacketsK(GrimPlayer player) {
         super(player);

common/src/main/java/ac/grim/grimac/checks/impl/badpackets/BadPacketsL.java

@@ -8,13 +8,11 @@ import com.github.retrooper.packetevents.event.PacketReceiveEvent;
 import com.github.retrooper.packetevents.protocol.packettype.PacketType;
 import com.github.retrooper.packetevents.protocol.player.ClientVersion;
 import com.github.retrooper.packetevents.protocol.player.DiggingAction;
-import com.github.retrooper.packetevents.protocol.world.BlockFace;
 import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientPlayerDigging;
 
 import java.util.Locale;
 
-// checks for impossible dig packets
-@CheckData(name = "BadPacketsL")
+@CheckData(name = "BadPacketsL", description = "Sent impossible dig packet")
 public class BadPacketsL extends Check implements PacketCheck {
 
     public BadPacketsL(GrimPlayer player) {
@@ -26,23 +24,25 @@ public class BadPacketsL extends Check implements PacketCheck {
         if (event.getPacketType() == PacketType.Play.Client.PLAYER_DIGGING) {
             final WrapperPlayClientPlayerDigging packet = new WrapperPlayClientPlayerDigging(event);
 
-            if (packet.getAction() == DiggingAction.START_DIGGING || packet.getAction() == DiggingAction.FINISHED_DIGGING || packet.getAction() == DiggingAction.CANCELLED_DIGGING) return;
+            if (packet.getAction() == DiggingAction.START_DIGGING || packet.getAction() == DiggingAction.FINISHED_DIGGING || packet.getAction() == DiggingAction.CANCELLED_DIGGING)
+                return;
 
             // 1.8 and above clients always send digging packets that aren't used for digging at 0, 0, 0, facing DOWN
             // 1.7 and below clients do the same, except use SOUTH for RELEASE_USE_ITEM
-            final BlockFace expectedFace = player.getClientVersion().isOlderThanOrEquals(ClientVersion.V_1_7_10) && packet.getAction() == DiggingAction.RELEASE_USE_ITEM
-                    ? BlockFace.SOUTH : BlockFace.DOWN;
+            final int expectedFace = player.getClientVersion().isOlderThanOrEquals(ClientVersion.V_1_7_10) && packet.getAction() == DiggingAction.RELEASE_USE_ITEM
+                    ? 255 : 0;
 
-            if (packet.getBlockFace() != expectedFace
+            if (packet.getBlockFaceId() != expectedFace
                     || packet.getBlockPosition().getX() != 0
                     || packet.getBlockPosition().getY() != 0
                     || packet.getBlockPosition().getZ() != 0
                     || packet.getSequence() != 0
             ) {
-                if (flagAndAlert("xyzF="
-                        + packet.getBlockPosition().getX() + ", " + packet.getBlockPosition().getY() + ", " + packet.getBlockPosition().getZ() + ", " + packet.getBlockFace()
+                if (flagAndAlert("pos="
+                        + packet.getBlockPosition().getX() + ", " + packet.getBlockPosition().getY() + ", " + packet.getBlockPosition().getZ()
+                        + ", face=" + packet.getBlockFace()
                         + ", sequence=" + packet.getSequence()
-                        + ", action=" + packet.getAction().toString().toLowerCase(Locale.ROOT).replace("_", " ") + " v" + player.getVersionName()
+                        + ", action=" + packet.getAction().toString().toLowerCase(Locale.ROOT)
                 ) && shouldModifyPackets() && packet.getAction() != DiggingAction.RELEASE_USE_ITEM) {
                     event.setCancelled(true);
                     player.onPacketCancel();

common/src/main/java/ac/grim/grimac/checks/impl/badpackets/BadPacketsM.java

@@ -11,16 +11,16 @@ import com.github.retrooper.packetevents.protocol.packettype.PacketType;
 import com.github.retrooper.packetevents.protocol.player.ClientVersion;
 import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientInteractEntity;
 
-@CheckData(name = "BadPacketsM", experimental = true)
+@CheckData(name = "BadPacketsM")
 public class BadPacketsM extends Check implements PacketCheck {
-    public BadPacketsM(final GrimPlayer player) {
-        super(player);
-    }
-
     // 1.7 players do not send INTERACT_AT, so we cannot check them
     private final boolean exempt = player.getClientVersion().isOlderThanOrEquals(ClientVersion.V_1_7_10);
     private boolean sentInteractAt = false;
 
+    public BadPacketsM(final GrimPlayer player) {
+        super(player);
+    }
+
     @Override
     public void onPacketReceive(PacketReceiveEvent event) {
         if (event.getPacketType() == PacketType.Play.Client.INTERACT_ENTITY && !exempt) {

common/src/main/java/ac/grim/grimac/checks/impl/badpackets/BadPacketsN.java

@@ -5,7 +5,7 @@ import ac.grim.grimac.checks.CheckData;
 import ac.grim.grimac.checks.type.PacketCheck;
 import ac.grim.grimac.player.GrimPlayer;
 
-@CheckData(name = "BadPacketsN")
+@CheckData(name = "BadPacketsN", setback = 0)
 public class BadPacketsN extends Check implements PacketCheck {
     public BadPacketsN(final GrimPlayer player) {
         super(player);

common/src/main/java/ac/grim/grimac/checks/impl/badpackets/BadPacketsO.java

@@ -39,7 +39,7 @@ public class BadPacketsO extends Check implements PacketCheck {
             boolean hasID = false;
 
             for (Pair<Long, Long> iterator : keepaliveMap) {
-                if (iterator.getFirst() == id) {
+                if (iterator.first() == id) {
                     hasID = true;
                     break;
                 }
@@ -55,7 +55,7 @@ public class BadPacketsO extends Check implements PacketCheck {
                 do {
                     data = keepaliveMap.poll();
                     if (data == null) break;
-                } while (data.getFirst() != id);
+                } while (data.first() != id);
             }
         }
     }

common/src/main/java/ac/grim/grimac/checks/impl/badpackets/BadPacketsP.java

@@ -8,18 +8,19 @@ import com.github.retrooper.packetevents.event.PacketReceiveEvent;
 import com.github.retrooper.packetevents.event.PacketSendEvent;
 import com.github.retrooper.packetevents.protocol.packettype.PacketType;
 import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientClickWindow;
+import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientClickWindow.WindowClickType;
 import com.github.retrooper.packetevents.wrapper.play.server.WrapperPlayServerOpenWindow;
 
 @CheckData(name = "BadPacketsP", experimental = true)
 public class BadPacketsP extends Check implements PacketCheck {
 
+    private int containerType = -1;
+    private int containerId = -1;
+
     public BadPacketsP(GrimPlayer playerData) {
         super(playerData);
     }
 
-    private int containerType = -1;
-    private int containerId = -1;
-
     @Override
     public void onPacketSend(final PacketSendEvent event) {
         if (event.getPacketType() == PacketType.Play.Server.OPEN_WINDOW) {
@@ -33,35 +34,22 @@ public class BadPacketsP extends Check implements PacketCheck {
     public void onPacketReceive(PacketReceiveEvent event) {
         if (event.getPacketType() == PacketType.Play.Client.CLICK_WINDOW) {
             WrapperPlayClientClickWindow wrapper = new WrapperPlayClientClickWindow(event);
-            int clickType = wrapper.getWindowClickType().ordinal();
+            WindowClickType clickType = wrapper.getWindowClickType();
             int button = wrapper.getButton();
 
-            boolean flag = false;
+            // TODO: Adjust for containers
+            boolean flag = switch (clickType) {
+                case PICKUP, QUICK_MOVE, CLONE -> button > 2 || button < 0;
+                case SWAP -> (button > 8 || button < 0) && button != 40;
+                case THROW -> button != 0 && button != 1;
+                case QUICK_CRAFT -> button == 3 || button == 7 || button > 10 || button < 0;
+                case PICKUP_ALL -> button != 0;
+                case UNKNOWN -> false;
+            };
 
-            //TODO: Adjust for containers
-            switch (clickType) {
-                case 0:
-                case 1:
-                case 4:
-                    if (button != 0 && button != 1) flag = true;
-                    break;
-                case 2:
-                    if ((button > 8 || button < 0) && button != 40) flag = true;
-                    break;
-                case 3:
-                    if (button != 2) flag = true;
-                    break;
-                case 5:
-                    if (button == 3 || button == 7 || button > 10 || button < 0) flag = true;
-                    break;
-                case 6:
-                    if (button != 0) flag = true;
-                    break;
-            }
-
-            //Allowing this to false flag to debug and find issues faster
+            // Allowing this to false flag to debug and find issues faster
             if (flag) {
-                if (flagAndAlert("clickType=" + clickType + " button=" + button + (wrapper.getWindowId() == containerId ? " container=" + containerType : "")) && shouldModifyPackets()) {
+                if (flagAndAlert("clickType=" + clickType.toString().toLowerCase() + ", button=" + button + (wrapper.getWindowId() == containerId ? ", container=" + containerType : "")) && shouldModifyPackets()) {
                     event.setCancelled(true);
                     player.onPacketCancel();
                 }

common/src/main/java/ac/grim/grimac/checks/impl/badpackets/BadPacketsQ.java

@@ -19,8 +19,10 @@ public class BadPacketsQ extends Check implements PacketCheck {
     public void onPacketReceive(PacketReceiveEvent event) {
         if (event.getPacketType() == Client.ENTITY_ACTION) {
             WrapperPlayClientEntityAction wrapper = new WrapperPlayClientEntityAction(event);
-
-            if (wrapper.getJumpBoost() < 0 || wrapper.getJumpBoost() > 100 || wrapper.getEntityId() != player.entityID || (wrapper.getAction() != Action.START_JUMPING_WITH_HORSE && wrapper.getJumpBoost() != 0)) {
+            // you are able to send negative jump boost, how and why!?
+            if (Math.abs(wrapper.getJumpBoost()) > 100
+                    || wrapper.getEntityId() != player.entityID
+                    || wrapper.getAction() != Action.START_JUMPING_WITH_HORSE && wrapper.getJumpBoost() != 0) {
                 if (flagAndAlert("boost=" + wrapper.getJumpBoost() + ", action=" + wrapper.getAction() + ", entity=" + wrapper.getEntityId()) && shouldModifyPackets()) {
                     event.setCancelled(true);
                     player.onPacketCancel();

common/src/main/java/ac/grim/grimac/checks/impl/badpackets/BadPacketsR.java

@@ -10,23 +10,23 @@ import com.github.retrooper.packetevents.protocol.player.GameMode;
 
 @CheckData(name = "BadPacketsR", decay = 0.25, experimental = true)
 public class BadPacketsR extends Check implements PacketCheck {
-    public BadPacketsR(final GrimPlayer player) {
-        super(player);
-    }
-
     private int positions = 0;
     private long clock = 0;
     private long lastTransTime;
     private int oldTransId = 0;
 
+    public BadPacketsR(final GrimPlayer player) {
+        super(player);
+    }
+
     @Override
     public void onPacketReceive(final PacketReceiveEvent event) {
         if (isTransaction(event.getPacketType()) && player.packetStateData.lastTransactionPacketWasValid) {
             long ms = (player.getPlayerClockAtLeast() - clock) / 1000000L;
             long diff = (System.currentTimeMillis() - lastTransTime);
             if (diff > 2000 && ms > 2000) {
-                if (positions == 0 && clock != 0 && player.gamemode != GameMode.SPECTATOR && !player.compensatedEntities.getSelf().isDead) {
-                    flagAndAlert("time=" + ms + "ms, " + "lst=" + diff + "ms, positions=" + positions);
+                if (positions == 0 && clock != 0 && player.gamemode != GameMode.SPECTATOR && !player.compensatedEntities.self.isDead) {
+                    flag("time=" + ms + "ms, " + "lst=" + diff + "ms, positions=" + positions);
                 } else {
                     reward();
                 }
@@ -39,9 +39,10 @@ public class BadPacketsR extends Check implements PacketCheck {
         }
         //
         if ((event.getPacketType() == PacketType.Play.Client.PLAYER_POSITION_AND_ROTATION ||
-                event.getPacketType() == PacketType.Play.Client.PLAYER_POSITION) && !player.compensatedEntities.getSelf().inVehicle()) {
+                event.getPacketType() == PacketType.Play.Client.PLAYER_POSITION) && !player.inVehicle()) {
             positions++;
-        } else if (event.getPacketType() == PacketType.Play.Client.STEER_VEHICLE && player.compensatedEntities.getSelf().inVehicle()) {
+        } else if ((event.getPacketType() == PacketType.Play.Client.STEER_VEHICLE || event.getPacketType() == PacketType.Play.Client.VEHICLE_MOVE)
+                && player.inVehicle()) {
             positions++;
         }
     }

common/src/main/java/ac/grim/grimac/checks/impl/badpackets/BadPacketsT.java

@@ -14,10 +14,6 @@ import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientIn
 
 @CheckData(name = "BadPacketsT")
 public class BadPacketsT extends Check implements PacketCheck {
-    public BadPacketsT(final GrimPlayer player) {
-        super(player);
-    }
-
     // 1.7 and 1.8 seem to have different hitbox "expansion" values than 1.9+
     // https://github.com/GrimAnticheat/Grim/pull/1274#issuecomment-1872458702
     // https://github.com/GrimAnticheat/Grim/pull/1274#issuecomment-1872533497
@@ -26,6 +22,10 @@ public class BadPacketsT extends Check implements PacketCheck {
     private final double minVerticalDisplacement = -0.0001 - (hasLegacyExpansion ? 0.1 : 0);
     private final double maxVerticalDisplacement = 1.8001 + (hasLegacyExpansion ? 0.1 : 0);
 
+    public BadPacketsT(final GrimPlayer player) {
+        super(player);
+    }
+
     @Override
     public void onPacketReceive(final PacketReceiveEvent event) {
         if (event.getPacketType().equals(PacketType.Play.Client.INTERACT_ENTITY)) {
@@ -49,7 +49,7 @@ public class BadPacketsT extends Check implements PacketCheck {
                 //  27/12/2023 - Dynamic values for more than just one entity type?
                 //  28/12/2023 - Player-only is fine
                 //  30/12/2023 - Expansions differ in 1.9+
-                final float scale = (float) packetEntity.getAttributeValue(Attributes.GENERIC_SCALE);
+                final float scale = (float) packetEntity.getAttributeValue(Attributes.SCALE);
                 if (targetVector.y > (minVerticalDisplacement * scale) && targetVector.y < (maxVerticalDisplacement * scale)
                         && Math.abs(targetVector.x) < (maxHorizontalDisplacement * scale)
                         && Math.abs(targetVector.z) < (maxHorizontalDisplacement * scale)) {

common/src/main/java/ac/grim/grimac/checks/impl/badpackets/BadPacketsU.java

@@ -6,7 +6,6 @@ import ac.grim.grimac.checks.type.PacketCheck;
 import ac.grim.grimac.player.GrimPlayer;
 import com.github.retrooper.packetevents.event.PacketReceiveEvent;
 import com.github.retrooper.packetevents.protocol.item.ItemStack;
-import com.github.retrooper.packetevents.protocol.item.type.ItemType;
 import com.github.retrooper.packetevents.protocol.item.type.ItemTypes;
 import com.github.retrooper.packetevents.protocol.packettype.PacketType;
 import com.github.retrooper.packetevents.protocol.player.ClientVersion;
@@ -15,7 +14,7 @@ import com.github.retrooper.packetevents.util.Vector3f;
 import com.github.retrooper.packetevents.util.Vector3i;
 import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientPlayerBlockPlacement;
 
-@CheckData(name = "BadPacketsU", experimental = true)
+@CheckData(name = "BadPacketsU", description = "Sent impossible use item packet")
 public class BadPacketsU extends Check implements PacketCheck {
     public BadPacketsU(GrimPlayer player) {
         super(player);

common/src/main/java/ac/grim/grimac/checks/impl/badpackets/BadPacketsV.java

@@ -0,0 +1,41 @@
+package ac.grim.grimac.checks.impl.badpackets;
+
+import ac.grim.grimac.checks.Check;
+import ac.grim.grimac.checks.CheckData;
+import ac.grim.grimac.checks.type.PacketCheck;
+import ac.grim.grimac.player.GrimPlayer;
+import com.github.retrooper.packetevents.event.PacketReceiveEvent;
+import com.github.retrooper.packetevents.protocol.packettype.PacketType;
+import com.github.retrooper.packetevents.protocol.player.ClientVersion;
+import com.github.retrooper.packetevents.util.Vector3d;
+import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientPlayerFlying;
+
+@CheckData(name = "BadPacketsV", description = "Did not move far enough", experimental = true)
+public class BadPacketsV extends Check implements PacketCheck {
+    private int noReminderTicks;
+
+    public BadPacketsV(GrimPlayer player) {
+        super(player);
+    }
+
+    @Override
+    public void onPacketReceive(PacketReceiveEvent event) {
+        if (!player.canSkipTicks() && isTickPacket(event.getPacketType())) {
+            if (event.getPacketType() == PacketType.Play.Client.PLAYER_POSITION || event.getPacketType() == PacketType.Play.Client.PLAYER_POSITION_AND_ROTATION) {
+                int positionAtLeastEveryNTicks = player.getClientVersion().isOlderThanOrEquals(ClientVersion.V_1_8) ? 20 : 19;
+
+                if (noReminderTicks < positionAtLeastEveryNTicks && !player.uncertaintyHandler.lastTeleportTicks.hasOccurredSince(1)) {
+                    final double deltaSq = new WrapperPlayClientPlayerFlying(event).getLocation().getPosition()
+                            .distanceSquared(new Vector3d(player.lastX, player.lastY, player.lastZ));
+                    if (deltaSq <= player.getMovementThreshold() * player.getMovementThreshold()) {
+                        flagAndAlert("delta=" + Math.sqrt(deltaSq));
+                    }
+                }
+
+                noReminderTicks = 0;
+            } else {
+                noReminderTicks++;
+            }
+        }
+    }
+}

common/src/main/java/ac/grim/grimac/checks/impl/badpackets/BadPacketsW.java

@@ -5,7 +5,7 @@ import ac.grim.grimac.checks.CheckData;
 import ac.grim.grimac.checks.type.PacketCheck;
 import ac.grim.grimac.player.GrimPlayer;
 
-@CheckData(name = "BadPacketsW", experimental = true)
+@CheckData(name = "BadPacketsW", description = "Interacted with non-existent entity", experimental = true)
 public class BadPacketsW extends Check implements PacketCheck {
     public BadPacketsW(GrimPlayer player) {
         super(player);

common/src/main/java/ac/grim/grimac/checks/impl/badpackets/BadPacketsX.java

@@ -0,0 +1,77 @@
+package ac.grim.grimac.checks.impl.badpackets;
+
+import ac.grim.grimac.checks.Check;
+import ac.grim.grimac.checks.CheckData;
+import ac.grim.grimac.checks.type.PostPredictionCheck;
+import ac.grim.grimac.player.GrimPlayer;
+import ac.grim.grimac.utils.anticheat.update.PredictionComplete;
+import com.github.retrooper.packetevents.event.PacketReceiveEvent;
+import com.github.retrooper.packetevents.protocol.packettype.PacketType;
+import com.github.retrooper.packetevents.protocol.player.GameMode;
+import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientEntityAction;
+
+@CheckData(name = "BadPacketsX", experimental = true)
+public class BadPacketsX extends Check implements PostPredictionCheck {
+    private boolean sprint;
+    private boolean sneak;
+    private int flags;
+
+    public BadPacketsX(GrimPlayer player) {
+        super(player);
+    }
+
+    @Override
+    public void onPredictionComplete(final PredictionComplete predictionComplete) {
+        if (!player.canSkipTicks()) {
+            if (flags > 0) {
+                setbackIfAboveSetbackVL();
+            }
+
+            flags = 0;
+            return;
+        }
+
+        if (player.isTickingReliablyFor(3)) {
+            for (; flags > 0; flags--) {
+                flagAndAlertWithSetback();
+            }
+        }
+
+        flags = 0;
+    }
+
+    @Override
+    public void onPacketReceive(PacketReceiveEvent event) {
+        if (player.gamemode == GameMode.SPECTATOR || isTickPacket(event.getPacketType())) {
+            sprint = sneak = false;
+            return;
+        }
+
+        if (event.getPacketType() == PacketType.Play.Client.ENTITY_ACTION) {
+            switch (new WrapperPlayClientEntityAction(event).getAction()) {
+                case START_SNEAKING, STOP_SNEAKING -> {
+                    if (sneak) {
+                        if (player.canSkipTicks() || flagAndAlert()) {
+                            flags++;
+                        }
+                    }
+
+                    sneak = true;
+                }
+                case START_SPRINTING, STOP_SPRINTING -> {
+                    if (player.inVehicle()) {
+                        return;
+                    }
+
+                    if (sprint) {
+                        if (player.canSkipTicks() || flagAndAlert()) {
+                            flags++;
+                        }
+                    }
+
+                    sprint = true;
+                }
+            }
+        }
+    }
+}

common/src/main/java/ac/grim/grimac/checks/impl/badpackets/BadPacketsY.java

@@ -8,10 +8,7 @@ import com.github.retrooper.packetevents.event.PacketReceiveEvent;
 import com.github.retrooper.packetevents.protocol.packettype.PacketType;
 import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientHeldItemChange;
 
-/**
- * Checks for out of bounds slot changes
- */
-@CheckData(name = "BadPacketsY")
+@CheckData(name = "BadPacketsY", description = "Sent out of bounds slot id")
 public class BadPacketsY extends Check implements PacketCheck {
     public BadPacketsY(GrimPlayer player) {
         super(player);
@@ -22,7 +19,7 @@ public class BadPacketsY extends Check implements PacketCheck {
         if (event.getPacketType() == PacketType.Play.Client.HELD_ITEM_CHANGE) {
             final int slot = new WrapperPlayClientHeldItemChange(event).getSlot();
             if (slot > 8 || slot < 0) { // ban
-                if (flagAndAlert("slot="+slot) && shouldModifyPackets()) {
+                if (flagAndAlert("slot=" + slot) && shouldModifyPackets()) {
                     event.setCancelled(true);
                     player.onPacketCancel();
                 }

common/src/main/java/ac/grim/grimac/checks/impl/baritone/Baritone.java

@@ -12,12 +12,12 @@ import ac.grim.grimac.utils.math.GrimMath;
 // This check has been patched by Baritone for a long time and it also seems to false with cinematic camera now, so it is disabled.
 @CheckData(name = "Baritone")
 public class Baritone extends Check implements RotationCheck {
+    private int verbose;
+
     public Baritone(GrimPlayer playerData) {
         super(playerData);
     }
 
-    private int verbose;
-
     @Override
     public void process(final RotationUpdate rotationUpdate) {
         final HeadRotation from = rotationUpdate.getFrom();

common/src/main/java/ac/grim/grimac/checks/impl/breaking/AirLiquidBreak.java

@@ -0,0 +1,71 @@
+package ac.grim.grimac.checks.impl.breaking;
+
+import ac.grim.grimac.GrimAPI;
+import ac.grim.grimac.checks.Check;
+import ac.grim.grimac.checks.CheckData;
+import ac.grim.grimac.checks.type.BlockBreakCheck;
+import ac.grim.grimac.player.GrimPlayer;
+import ac.grim.grimac.utils.anticheat.update.BlockBreak;
+import com.github.retrooper.packetevents.protocol.item.type.ItemTypes;
+import com.github.retrooper.packetevents.protocol.player.ClientVersion;
+import com.github.retrooper.packetevents.protocol.player.DiggingAction;
+import com.github.retrooper.packetevents.protocol.world.states.type.StateType;
+import com.github.retrooper.packetevents.protocol.world.states.type.StateTypes;
+import com.github.retrooper.packetevents.util.Vector3i;
+import org.checkerframework.checker.nullness.qual.NonNull;
+
+@CheckData(name = "AirLiquidBreak", description = "Breaking a block that cannot be broken")
+public class AirLiquidBreak extends Check implements BlockBreakCheck {
+    public final boolean noFireHitbox = player.getClientVersion().isOlderThanOrEquals(ClientVersion.V_1_15_2);
+    private int lastTick;
+    private boolean didLastFlag;
+    // Initialize to non-null values to prevent NPE when checking for blockType properties and if position equals old position
+    private @NonNull Vector3i lastBreakLoc = new Vector3i();
+    private @NonNull StateType lastBlockType = StateTypes.AIR;
+
+    public AirLiquidBreak(GrimPlayer player) {
+        super(player);
+    }
+
+    @Override
+    public void onBlockBreak(BlockBreak blockBreak) {
+        if (blockBreak.action != DiggingAction.START_DIGGING && blockBreak.action != DiggingAction.FINISHED_DIGGING)
+            return;
+
+        final StateType block = blockBreak.block.getType();
+
+        // Fixes false from breaking kelp underwater
+        // The client sends two start digging packets to the server both in the same tick. AirLiquidBreak gets called twice, doesn't false the first time, but falses the second
+        // One ends up breaking the kelp, the other ends up doing nothing besides falsing this check because we think they're trying to mine water
+        // I am explicitly making this patch as narrow and specific as possible to potentially discover other blocks that exhibit similar behaviour
+        int newTick = GrimAPI.INSTANCE.getTickManager().currentTick;
+        if (lastTick == newTick
+                && lastBreakLoc.equals(blockBreak.position)
+                && !didLastFlag
+                && lastBlockType.getHardness() == 0.0F
+                && lastBlockType.getBlastResistance() == 0.0F
+                && block == StateTypes.WATER
+        ) return;
+        lastTick = newTick;
+        lastBreakLoc = blockBreak.position;
+        lastBlockType = block;
+
+        // the block does not have a hitbox
+        boolean invalid = (block == StateTypes.LIGHT && !(player.getInventory().getHeldItem().is(ItemTypes.LIGHT) || player.getInventory().getOffHand().is(ItemTypes.LIGHT)))
+                || block.isAir()
+                || block == StateTypes.WATER
+                || block == StateTypes.LAVA
+                || block == StateTypes.BUBBLE_COLUMN
+                || block == StateTypes.MOVING_PISTON
+                || block == StateTypes.FIRE && noFireHitbox
+                // or the client claims to have broken an unbreakable block
+                || block.getHardness() == -1.0f && blockBreak.action == DiggingAction.FINISHED_DIGGING;
+
+        if (invalid && flagAndAlert("block=" + block.getName() + ", type=" + blockBreak.action) && shouldModifyPackets()) {
+            didLastFlag = true;
+            blockBreak.cancel();
+        } else {
+            didLastFlag = false;
+        }
+    }
+}

common/src/main/java/ac/grim/grimac/checks/impl/breaking/FarBreak.java

@@ -0,0 +1,46 @@
+package ac.grim.grimac.checks.impl.breaking;
+
+import ac.grim.grimac.checks.Check;
+import ac.grim.grimac.checks.CheckData;
+import ac.grim.grimac.checks.type.BlockBreakCheck;
+import ac.grim.grimac.player.GrimPlayer;
+import ac.grim.grimac.utils.anticheat.update.BlockBreak;
+import ac.grim.grimac.utils.collisions.datatypes.SimpleCollisionBox;
+import ac.grim.grimac.utils.math.Vector3dm;
+import ac.grim.grimac.utils.math.VectorUtils;
+import com.github.retrooper.packetevents.protocol.attribute.Attributes;
+import com.github.retrooper.packetevents.protocol.player.DiggingAction;
+import com.github.retrooper.packetevents.protocol.player.GameMode;
+
+@CheckData(name = "FarBreak", description = "Breaking blocks too far away", experimental = true)
+public class FarBreak extends Check implements BlockBreakCheck {
+    public FarBreak(GrimPlayer player) {
+        super(player);
+    }
+
+    @Override
+    public void onBlockBreak(BlockBreak blockBreak) {
+        if (player.gamemode == GameMode.SPECTATOR || player.inVehicle() || blockBreak.action == DiggingAction.CANCELLED_DIGGING)
+            return; // falses
+
+        double min = Double.MAX_VALUE;
+        for (double d : player.getPossibleEyeHeights()) {
+            SimpleCollisionBox box = new SimpleCollisionBox(blockBreak.position);
+            Vector3dm eyes = new Vector3dm(player.x, player.y + d, player.z);
+            Vector3dm best = VectorUtils.cutBoxToVector(eyes, box);
+            min = Math.min(min, eyes.distanceSquared(best));
+        }
+
+        // getPickRange() determines this?
+        // With 1.20.5+ the new attribute determines creative mode reach using a modifier
+        double maxReach = player.compensatedEntities.self.getAttributeValue(Attributes.BLOCK_INTERACTION_RANGE);
+        if (player.packetStateData.didLastMovementIncludePosition || player.canSkipTicks()) {
+            double threshold = player.getMovementThreshold();
+            maxReach += Math.hypot(threshold, threshold);
+        }
+
+        if (min > maxReach * maxReach && flagAndAlert(String.format("distance=%.2f", Math.sqrt(min))) && shouldModifyPackets()) {
+            blockBreak.cancel();
+        }
+    }
+}

common/src/main/java/ac/grim/grimac/checks/impl/breaking/FastBreak.java

@@ -0,0 +1,121 @@
+package ac.grim.grimac.checks.impl.breaking;
+
+import ac.grim.grimac.checks.Check;
+import ac.grim.grimac.checks.CheckData;
+import ac.grim.grimac.checks.type.BlockBreakCheck;
+import ac.grim.grimac.player.GrimPlayer;
+import ac.grim.grimac.utils.anticheat.update.BlockBreak;
+import ac.grim.grimac.utils.math.GrimMath;
+import ac.grim.grimac.utils.nmsutil.BlockBreakSpeed;
+import com.github.retrooper.packetevents.event.PacketReceiveEvent;
+import com.github.retrooper.packetevents.protocol.packettype.PacketType;
+import com.github.retrooper.packetevents.protocol.player.ClientVersion;
+import com.github.retrooper.packetevents.protocol.player.DiggingAction;
+import com.github.retrooper.packetevents.protocol.world.states.WrappedBlockState;
+import com.github.retrooper.packetevents.protocol.world.states.type.StateType;
+import com.github.retrooper.packetevents.protocol.world.states.type.StateTypes;
+import com.github.retrooper.packetevents.util.Vector3i;
+import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientPlayerFlying;
+
+import java.util.Set;
+
+// Based loosely off of Hawk BlockBreakSpeedSurvival
+// Also based loosely off of NoCheatPlus FastBreak
+// Also based off minecraft wiki: https://minecraft.wiki/w/Breaking#Instant_breaking
+@CheckData(name = "FastBreak", description = "Breaking blocks too quickly")
+public class FastBreak extends Check implements BlockBreakCheck {
+
+    // For some reason these states flag and I don't know why.
+    // Better to just exempt to not annoy legit players.
+    private static final Set<StateType> EXEMPT_STATES = Set.of();
+
+    public FastBreak(GrimPlayer playerData) {
+        super(playerData);
+    }
+
+    // The block the player is currently breaking
+    Vector3i targetBlock = null;
+    // The maximum amount of damage the player deals to the block
+    //
+    double maximumBlockDamage = 0;
+    // The last time a finish digging packet was sent, to enforce 0.3-second delay after non-instabreak
+    long lastFinishBreak = 0;
+    // The time the player started to break the block, to know how long the player waited until they finished breaking the block
+    long startBreak = 0;
+
+    // The buffer to this check
+    double blockBreakBalance = 0;
+    double blockDelayBalance = 0;
+
+    @Override
+    public void onBlockBreak(BlockBreak blockBreak) {
+        if (blockBreak.action == DiggingAction.START_DIGGING) {
+            WrappedBlockState block = blockBreak.block;
+
+            // Exempt all blocks that do not exist in the player version
+            final WrappedBlockState defaultState = WrappedBlockState.getDefaultState(player.getClientVersion(), block.getType());
+            if (defaultState.getType() == StateTypes.AIR || EXEMPT_STATES.contains(defaultState.getType())) {
+                return;
+            }
+
+            startBreak = System.currentTimeMillis() - (targetBlock == null ? 50 : 0); // ???
+            targetBlock = blockBreak.position;
+
+            maximumBlockDamage = BlockBreakSpeed.getBlockDamage(player, targetBlock);
+
+            double breakDelay = System.currentTimeMillis() - lastFinishBreak;
+
+            if (breakDelay >= 275) { // Reduce buffer if "close enough"
+                blockDelayBalance *= 0.9;
+            } else { // Otherwise, increase buffer
+                blockDelayBalance += 300 - breakDelay;
+            }
+
+            if (blockDelayBalance > 1000) { // If more than a second of advantage
+                if (flagAndAlert("delay=" + breakDelay + "ms, type=" + blockBreak.block.getType()) && shouldModifyPackets()) {
+                    blockBreak.cancel();
+                }
+            }
+
+            clampBalance();
+        }
+
+        if (blockBreak.action == DiggingAction.FINISHED_DIGGING && targetBlock != null) {
+            double predictedTime = Math.ceil(1 / maximumBlockDamage) * 50;
+            double realTime = System.currentTimeMillis() - startBreak;
+            double diff = predictedTime - realTime;
+
+            clampBalance();
+
+            if (diff < 25) {  // Reduce buffer if "close enough"
+                blockBreakBalance *= 0.9;
+            } else { // Otherwise, increase buffer
+                blockBreakBalance += diff;
+            }
+
+            if (blockBreakBalance > 1000) { // If more than a second of advantage
+                if (flagAndAlert("diff=" + diff + "ms, balance=" + blockBreakBalance + "ms, type=" + blockBreak.block.getType()) && shouldModifyPackets()) {
+                    blockBreak.cancel();
+                }
+            }
+
+            // also set start time because the breaking netcode is fucked on 1.14.4+
+            lastFinishBreak = startBreak = System.currentTimeMillis();
+        }
+    }
+
+    @Override
+    public void onPacketReceive(PacketReceiveEvent event) {
+        // Find the most optimal block damage using the animation packet, which is sent at least once a tick when breaking blocks
+        // On 1.8 clients, via screws with this packet meaning we must fall back to the 1.8 idle flying packet
+        if ((player.getClientVersion().isNewerThanOrEquals(ClientVersion.V_1_9) ? event.getPacketType() == PacketType.Play.Client.ANIMATION : WrapperPlayClientPlayerFlying.isFlying(event.getPacketType())) && targetBlock != null) {
+            maximumBlockDamage = Math.max(maximumBlockDamage, BlockBreakSpeed.getBlockDamage(player, targetBlock));
+        }
+    }
+
+    private void clampBalance() {
+        double balance = Math.max(1000, (player.getTransactionPing()));
+        blockBreakBalance = GrimMath.clamp(blockBreakBalance, -balance, balance); // Clamp not Math.max in case other logic changes
+        blockDelayBalance = GrimMath.clamp(blockDelayBalance, -balance, balance);
+    }
+}

common/src/main/java/ac/grim/grimac/checks/impl/breaking/InvalidBreak.java

@@ -0,0 +1,30 @@
+package ac.grim.grimac.checks.impl.breaking;
+
+import ac.grim.grimac.checks.Check;
+import ac.grim.grimac.checks.CheckData;
+import ac.grim.grimac.checks.type.BlockBreakCheck;
+import ac.grim.grimac.player.GrimPlayer;
+import ac.grim.grimac.utils.anticheat.update.BlockBreak;
+import com.github.retrooper.packetevents.protocol.player.ClientVersion;
+import com.github.retrooper.packetevents.protocol.player.DiggingAction;
+
+@CheckData(name = "InvalidBreak", description = "Sent impossible block face id")
+public class InvalidBreak extends Check implements BlockBreakCheck {
+    public InvalidBreak(GrimPlayer player) {
+        super(player);
+    }
+
+    @Override
+    public void onBlockBreak(BlockBreak blockBreak) {
+        if (blockBreak.faceId == 255 && blockBreak.action == DiggingAction.CANCELLED_DIGGING && player.getClientVersion().isOlderThanOrEquals(ClientVersion.V_1_7_10)) {
+            return;
+        }
+
+        if (blockBreak.faceId < 0 || blockBreak.faceId > 5) {
+            // ban
+            if (flagAndAlert("face=" + blockBreak.faceId + ", action=" + blockBreak.action) && shouldModifyPackets()) {
+                blockBreak.cancel();
+            }
+        }
+    }
+}

common/src/main/java/ac/grim/grimac/checks/impl/breaking/MultiBreak.java

@@ -0,0 +1,73 @@
+package ac.grim.grimac.checks.impl.breaking;
+
+import ac.grim.grimac.checks.Check;
+import ac.grim.grimac.checks.CheckData;
+import ac.grim.grimac.checks.type.BlockBreakCheck;
+import ac.grim.grimac.player.GrimPlayer;
+import ac.grim.grimac.utils.anticheat.MessageUtil;
+import ac.grim.grimac.utils.anticheat.update.BlockBreak;
+import ac.grim.grimac.utils.anticheat.update.PredictionComplete;
+import com.github.retrooper.packetevents.event.PacketReceiveEvent;
+import com.github.retrooper.packetevents.protocol.player.DiggingAction;
+import com.github.retrooper.packetevents.protocol.player.GameMode;
+import com.github.retrooper.packetevents.protocol.world.BlockFace;
+import com.github.retrooper.packetevents.util.Vector3i;
+
+import java.util.ArrayList;
+import java.util.List;
+
+@CheckData(name = "MultiBreak", experimental = true)
+public class MultiBreak extends Check implements BlockBreakCheck {
+    private final List<String> flags = new ArrayList<>();
+    private boolean hasBroken;
+    private BlockFace lastFace;
+    private Vector3i lastPos;
+
+    public MultiBreak(GrimPlayer player) {
+        super(player);
+    }
+
+    @Override
+    public void onBlockBreak(BlockBreak blockBreak) {
+        if (blockBreak.action == DiggingAction.CANCELLED_DIGGING) {
+            return;
+        }
+
+        if (hasBroken && (blockBreak.face != lastFace || !blockBreak.position.equals(lastPos))) {
+            final String verbose = "face=" + blockBreak.face + ", lastFace=" + lastFace
+                    + ", pos=" + MessageUtil.toUnlabledString(blockBreak.position)
+                    + ", lastPos=" + MessageUtil.toUnlabledString(lastPos);
+            if (!player.canSkipTicks()) {
+                if (flagAndAlert(verbose) && shouldModifyPackets()) {
+                    blockBreak.cancel();
+                }
+            } else {
+                flags.add(verbose);
+            }
+        }
+
+        lastFace = blockBreak.face;
+        lastPos = blockBreak.position;
+        hasBroken = true;
+    }
+
+    @Override
+    public void onPacketReceive(PacketReceiveEvent event) {
+        if (player.gamemode == GameMode.SPECTATOR || isTickPacket(event.getPacketType())) {
+            hasBroken = false;
+        }
+    }
+
+    @Override
+    public void onPredictionComplete(PredictionComplete predictionComplete) {
+        if (!player.canSkipTicks()) return;
+
+        if (player.isTickingReliablyFor(3)) {
+            for (String verbose : flags) {
+                flagAndAlert(verbose);
+            }
+        }
+
+        flags.clear();
+    }
+}

common/src/main/java/ac/grim/grimac/checks/impl/breaking/NoSwingBreak.java

@@ -0,0 +1,42 @@
+package ac.grim.grimac.checks.impl.breaking;
+
+import ac.grim.grimac.checks.Check;
+import ac.grim.grimac.checks.CheckData;
+import ac.grim.grimac.checks.type.BlockBreakCheck;
+import ac.grim.grimac.player.GrimPlayer;
+import ac.grim.grimac.utils.anticheat.update.BlockBreak;
+import com.github.retrooper.packetevents.event.PacketReceiveEvent;
+import com.github.retrooper.packetevents.protocol.packettype.PacketType;
+import com.github.retrooper.packetevents.protocol.player.DiggingAction;
+
+@CheckData(name = "NoSwingBreak", description = "Did not swing while breaking block", experimental = true)
+public class NoSwingBreak extends Check implements BlockBreakCheck {
+    private boolean sentAnimation;
+    private boolean sentBreak;
+
+    public NoSwingBreak(GrimPlayer playerData) {
+        super(playerData);
+    }
+
+    @Override
+    public void onBlockBreak(BlockBreak blockBreak) {
+        if (blockBreak.action != DiggingAction.CANCELLED_DIGGING) {
+            sentBreak = true;
+        }
+    }
+
+    @Override
+    public void onPacketReceive(PacketReceiveEvent event) {
+        if (event.getPacketType() == PacketType.Play.Client.ANIMATION) {
+            sentAnimation = true;
+        }
+
+        if (isTickPacket(event.getPacketType())) {
+            if (sentBreak && !sentAnimation) {
+                flagAndAlert();
+            }
+
+            sentAnimation = sentBreak = false;
+        }
+    }
+}

common/src/main/java/ac/grim/grimac/checks/impl/breaking/PositionBreakA.java

@@ -0,0 +1,61 @@
+package ac.grim.grimac.checks.impl.breaking;
+
+import ac.grim.grimac.checks.Check;
+import ac.grim.grimac.checks.CheckData;
+import ac.grim.grimac.checks.type.BlockBreakCheck;
+import ac.grim.grimac.player.GrimPlayer;
+import ac.grim.grimac.utils.anticheat.update.BlockBreak;
+import ac.grim.grimac.utils.collisions.datatypes.SimpleCollisionBox;
+import com.github.retrooper.packetevents.protocol.player.DiggingAction;
+import com.github.retrooper.packetevents.protocol.world.states.type.StateTypes;
+
+@CheckData(name = "PositionBreakA")
+public class PositionBreakA extends Check implements BlockBreakCheck {
+    public PositionBreakA(GrimPlayer player) {
+        super(player);
+    }
+
+    @Override
+    public void onBlockBreak(BlockBreak blockBreak) {
+        if (player.inVehicle()
+                || blockBreak.action == DiggingAction.CANCELLED_DIGGING
+                || blockBreak.block.getType() == StateTypes.REDSTONE_WIRE
+        ) return;
+
+        SimpleCollisionBox combined = blockBreak.getCombinedBox();
+
+        final double[] possibleEyeHeights = player.getPossibleEyeHeights();
+        double minEyeHeight = Double.MAX_VALUE;
+        double maxEyeHeight = Double.MIN_VALUE;
+        for (double height : possibleEyeHeights) {
+            minEyeHeight = Math.min(minEyeHeight, height);
+            maxEyeHeight = Math.max(maxEyeHeight, height);
+        }
+
+        SimpleCollisionBox eyePositions = new SimpleCollisionBox(player.x, player.y + minEyeHeight, player.z, player.x, player.y + maxEyeHeight, player.z);
+        if (!player.packetStateData.didLastMovementIncludePosition || player.canSkipTicks()) {
+            eyePositions.expand(player.getMovementThreshold());
+        }
+
+        // If the player is inside a block, then they can ray trace through the block and hit the other side of the block
+        if (eyePositions.isIntersected(combined)) {
+            return;
+        }
+
+        // So now we have the player's possible eye positions
+        // So then look at the face that the player has clicked
+        boolean flag = switch (blockBreak.face) {
+            case NORTH -> eyePositions.minZ > combined.minZ; // Z- face
+            case SOUTH -> eyePositions.maxZ < combined.maxZ; // Z+ face
+            case EAST -> eyePositions.maxX < combined.maxX; // X+ face
+            case WEST -> eyePositions.minX > combined.minX; // X- face
+            case UP -> eyePositions.maxY < combined.maxY; // Y+ face
+            case DOWN -> eyePositions.minY > combined.minY; // Y- face
+            default -> false;
+        };
+
+        if (flag && flagAndAlert("action=" + blockBreak.action + ", face=" + blockBreak.face) && shouldModifyPackets()) {
+            blockBreak.cancel();
+        }
+    }
+}

common/src/main/java/ac/grim/grimac/checks/impl/breaking/PositionBreakB.java

@@ -0,0 +1,37 @@
+package ac.grim.grimac.checks.impl.breaking;
+
+import ac.grim.grimac.checks.Check;
+import ac.grim.grimac.checks.CheckData;
+import ac.grim.grimac.checks.type.BlockBreakCheck;
+import ac.grim.grimac.player.GrimPlayer;
+import ac.grim.grimac.utils.anticheat.update.BlockBreak;
+import com.github.retrooper.packetevents.protocol.player.ClientVersion;
+import com.github.retrooper.packetevents.protocol.player.DiggingAction;
+import com.github.retrooper.packetevents.protocol.world.BlockFace;
+
+@CheckData(name = "PositionBreakB", experimental = true)
+public class PositionBreakB extends Check implements BlockBreakCheck {
+    private final int releaseFace = player.getClientVersion().isNewerThanOrEquals(ClientVersion.V_1_8) ? 0 : 255;
+    private BlockFace lastFace;
+
+    public PositionBreakB(GrimPlayer player) {
+        super(player);
+    }
+
+    @Override
+    public void onBlockBreak(BlockBreak blockBreak) {
+        if (blockBreak.action == DiggingAction.START_DIGGING) {
+            if (blockBreak.face == lastFace) {
+                lastFace = null;
+            }
+        }
+
+        if (lastFace != null) {
+            flagAndAlert("lastFace=" + lastFace + ", action=" + blockBreak.action);
+        }
+
+        if (blockBreak.action == DiggingAction.CANCELLED_DIGGING) {
+            lastFace = blockBreak.faceId == releaseFace ? null : blockBreak.face;
+        }
+    }
+}

common/src/main/java/ac/grim/grimac/checks/impl/breaking/RotationBreak.java

@@ -0,0 +1,122 @@
+package ac.grim.grimac.checks.impl.breaking;
+
+import ac.grim.grimac.checks.Check;
+import ac.grim.grimac.checks.CheckData;
+import ac.grim.grimac.checks.type.BlockBreakCheck;
+import ac.grim.grimac.player.GrimPlayer;
+import ac.grim.grimac.utils.anticheat.update.BlockBreak;
+import ac.grim.grimac.utils.collisions.datatypes.SimpleCollisionBox;
+import ac.grim.grimac.utils.data.Pair;
+import ac.grim.grimac.utils.math.Vector3dm;
+import ac.grim.grimac.utils.nmsutil.Ray;
+import ac.grim.grimac.utils.nmsutil.ReachUtils;
+import com.github.retrooper.packetevents.protocol.attribute.Attributes;
+import com.github.retrooper.packetevents.protocol.player.ClientVersion;
+import com.github.retrooper.packetevents.protocol.player.DiggingAction;
+import com.github.retrooper.packetevents.protocol.player.GameMode;
+import com.github.retrooper.packetevents.protocol.world.BlockFace;
+import com.github.retrooper.packetevents.util.Vector3d;
+import com.github.retrooper.packetevents.util.Vector3f;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+
+@CheckData(name = "RotationBreak", experimental = true)
+public class RotationBreak extends Check implements BlockBreakCheck {
+    private double flagBuffer = 0; // If the player flags once, force them to play legit, or we will cancel the tick before.
+    private boolean ignorePost = false;
+
+    public RotationBreak(GrimPlayer player) {
+        super(player);
+    }
+
+    @Override
+    public void onBlockBreak(BlockBreak blockBreak) {
+        if (player.gamemode == GameMode.SPECTATOR)
+            return; // you don't send flying packets when spectating entities
+        if (player.inVehicle()) return; // falses
+        if (blockBreak.action == DiggingAction.CANCELLED_DIGGING) return; // falses
+
+        if (flagBuffer > 0 && !didRayTraceHit(blockBreak)) {
+            ignorePost = true;
+            // If the player hit and has flagged this check recently
+            if (flagAndAlert("pre-flying, action=" + blockBreak.action) && shouldModifyPackets()) {
+                blockBreak.cancel();
+            }
+        }
+    }
+
+    @Override
+    public void onPostFlyingBlockBreak(BlockBreak blockBreak) {
+        if (player.gamemode == GameMode.SPECTATOR)
+            return; // you don't send flying packets when spectating entities
+        if (player.inVehicle()) return; // falses
+        if (blockBreak.action == DiggingAction.CANCELLED_DIGGING) return; // falses
+
+        // Don't flag twice
+        if (ignorePost) {
+            ignorePost = false;
+            return;
+        }
+
+        if (didRayTraceHit(blockBreak)) {
+            flagBuffer = Math.max(0, flagBuffer - 0.1);
+        } else {
+            flagBuffer = 1;
+            flagAndAlert("post-flying, action=" + blockBreak.action);
+        }
+    }
+
+    private boolean didRayTraceHit(BlockBreak blockBreak) {
+        SimpleCollisionBox box = new SimpleCollisionBox(blockBreak.position);
+
+        final double[] possibleEyeHeights = player.getPossibleEyeHeights();
+
+        // Start checking if player is in the block
+        double minEyeHeight = Double.MAX_VALUE;
+        double maxEyeHeight = Double.MIN_VALUE;
+        for (double height : possibleEyeHeights) {
+            minEyeHeight = Math.min(minEyeHeight, height);
+            maxEyeHeight = Math.max(maxEyeHeight, height);
+        }
+
+        SimpleCollisionBox eyePositions = new SimpleCollisionBox(player.x, player.y + minEyeHeight, player.z, player.x, player.y + maxEyeHeight, player.z);
+        eyePositions.expand(player.getMovementThreshold());
+
+        // If the player is inside a block, then they can ray trace through the block and hit the other side of the block
+        if (eyePositions.isIntersected(box)) {
+            return true;
+        }
+        // End checking if the player is in the block
+
+        List<Vector3f> possibleLookDirs = new ArrayList<>(Arrays.asList(
+                new Vector3f(player.lastXRot, player.yRot, 0),
+                new Vector3f(player.xRot, player.yRot, 0)
+        ));
+
+        // 1.9+ players could be a tick behind because we don't get skipped ticks
+        if (player.getClientVersion().isNewerThanOrEquals(ClientVersion.V_1_9)) {
+            possibleLookDirs.add(new Vector3f(player.lastXRot, player.lastYRot, 0));
+        }
+
+        // 1.7 players do not have any of these issues! They are always on the latest look vector
+        if (player.getClientVersion().isOlderThan(ClientVersion.V_1_8)) {
+            possibleLookDirs = Collections.singletonList(new Vector3f(player.xRot, player.yRot, 0));
+        }
+
+        final double distance = player.compensatedEntities.self.getAttributeValue(Attributes.BLOCK_INTERACTION_RANGE);
+        for (double d : possibleEyeHeights) {
+            for (Vector3f lookDir : possibleLookDirs) {
+                Vector3d starting = new Vector3d(player.x, player.y + d, player.z);
+                Ray trace = new Ray(player, starting.getX(), starting.getY(), starting.getZ(), lookDir.getX(), lookDir.getY());
+                Pair<Vector3dm, BlockFace> intercept = ReachUtils.calculateIntercept(box, trace.getOrigin(), trace.getPointAtDistance(distance));
+
+                if (intercept.first() != null) return true;
+            }
+        }
+
+        return false;
+    }
+}

common/src/main/java/ac/grim/grimac/checks/impl/breaking/WrongBreak.java

@@ -1,29 +1,28 @@
-package ac.grim.grimac.checks.impl.badpackets;
+package ac.grim.grimac.checks.impl.breaking;
 
 import ac.grim.grimac.checks.Check;
 import ac.grim.grimac.checks.CheckData;
-import ac.grim.grimac.checks.type.PacketCheck;
+import ac.grim.grimac.checks.type.BlockBreakCheck;
 import ac.grim.grimac.player.GrimPlayer;
+import ac.grim.grimac.utils.anticheat.MessageUtil;
+import ac.grim.grimac.utils.anticheat.update.BlockBreak;
 import com.github.retrooper.packetevents.PacketEvents;
-import com.github.retrooper.packetevents.event.PacketReceiveEvent;
 import com.github.retrooper.packetevents.manager.server.ServerVersion;
 import com.github.retrooper.packetevents.protocol.player.ClientVersion;
 import com.github.retrooper.packetevents.protocol.player.DiggingAction;
 import com.github.retrooper.packetevents.util.Vector3i;
-import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientPlayerDigging;
 
-import static ac.grim.grimac.events.packets.patch.ResyncWorldUtil.resyncPosition;
 import static ac.grim.grimac.utils.nmsutil.BlockBreakSpeed.getBlockDamage;
 
-@CheckData(name = "BadPacketsZ", experimental = true)
-public class BadPacketsZ extends Check implements PacketCheck {
-    public BadPacketsZ(final GrimPlayer player) {
-        super(player);
-    }
-
+@CheckData(name = "WrongBreak")
+public class WrongBreak extends Check implements BlockBreakCheck {
+    private final int exemptedY = player.getClientVersion().isOlderThan(ClientVersion.V_1_8) ? 255 : (PacketEvents.getAPI().getServerManager().getVersion().isNewerThanOrEquals(ServerVersion.V_1_14) ? -1 : 4095);
     private boolean lastBlockWasInstantBreak = false;
     private Vector3i lastBlock, lastCancelledBlock, lastLastBlock = null;
-    private final int exemptedY = player.getClientVersion().isOlderThan(ClientVersion.V_1_8) ? 255 : (PacketEvents.getAPI().getServerManager().getVersion().isNewerThanOrEquals(ServerVersion.V_1_14) ? -1 : 4095);
+
+    public WrongBreak(final GrimPlayer player) {
+        super(player);
+    }
 
     // The client sometimes sends a wierd cancel packet
     private boolean shouldExempt(final Vector3i pos) {
@@ -39,13 +38,10 @@ public class BadPacketsZ extends Check implements PacketCheck {
         return player.getClientVersion().isOlderThan(ClientVersion.V_1_14_4) || getBlockDamage(player, pos) < 1;
     }
 
-    private String formatted(Vector3i vec) {
-        return vec == null ? "null" : vec.x + ", " + vec.y + ", " + vec.z;
-    }
-
-    public void handle(PacketReceiveEvent event, WrapperPlayClientPlayerDigging dig) {
-        if (dig.getAction() == DiggingAction.START_DIGGING) {
-            final Vector3i pos = dig.getBlockPosition();
+    @Override
+    public void onBlockBreak(BlockBreak blockBreak) {
+        if (blockBreak.action == DiggingAction.START_DIGGING) {
+            final Vector3i pos = blockBreak.position;
 
             lastBlockWasInstantBreak = getBlockDamage(player, pos) >= 1;
             lastCancelledBlock = null;
@@ -53,24 +49,15 @@ public class BadPacketsZ extends Check implements PacketCheck {
             lastBlock = pos;
         }
 
-        if (dig.getAction() == DiggingAction.CANCELLED_DIGGING) {
-            final Vector3i pos = dig.getBlockPosition();
+        if (blockBreak.action == DiggingAction.CANCELLED_DIGGING) {
+            final Vector3i pos = blockBreak.position;
 
-            if (shouldExempt(pos)) {
-                lastCancelledBlock = null;
-                lastLastBlock = null;
-                lastBlock = null;
-                return;
-            }
-
-            if (!pos.equals(lastBlock)) {
+            if (!shouldExempt(pos) && !pos.equals(lastBlock)) {
                 // https://github.com/GrimAnticheat/Grim/issues/1512
                 if (player.getClientVersion().isOlderThan(ClientVersion.V_1_14_4) || (!lastBlockWasInstantBreak && pos.equals(lastCancelledBlock))) {
-                    if (flagAndAlert("action=CANCELLED_DIGGING" + ", last=" + formatted(lastBlock) + ", pos=" + formatted(pos))) {
+                    if (flagAndAlert("action=CANCELLED_DIGGING" + ", last=" + MessageUtil.toUnlabledString(lastBlock) + ", pos=" + MessageUtil.toUnlabledString(pos))) {
                         if (shouldModifyPackets()) {
-                            event.setCancelled(true);
-                            player.onPacketCancel();
-                            resyncPosition(player, pos);
+                            blockBreak.cancel();
                         }
                     }
                 }
@@ -82,24 +69,21 @@ public class BadPacketsZ extends Check implements PacketCheck {
             return;
         }
 
-        if (dig.getAction() == DiggingAction.FINISHED_DIGGING) {
-            final Vector3i pos = dig.getBlockPosition();
+        if (blockBreak.action == DiggingAction.FINISHED_DIGGING) {
+            final Vector3i pos = blockBreak.position;
 
             // when a player looks away from the mined block, they send a cancel, and if they look at it again, they don't send another start. (thanks mojang!)
             if (!pos.equals(lastCancelledBlock) && (!lastBlockWasInstantBreak || player.getClientVersion().isOlderThan(ClientVersion.V_1_14_4)) && !pos.equals(lastBlock)) {
-                if (flagAndAlert("action=FINISHED_DIGGING" + ", last=" + formatted(lastBlock) + ", pos=" + formatted(pos))) {
+                if (flagAndAlert("action=FINISHED_DIGGING" + ", last=" + MessageUtil.toUnlabledString(lastBlock) + ", pos=" + MessageUtil.toUnlabledString(pos))) {
                     if (shouldModifyPackets()) {
-                        event.setCancelled(true);
-                        player.onPacketCancel();
-                        resyncPosition(player, pos);
+                        blockBreak.cancel();
                     }
                 }
             }
 
-            lastCancelledBlock = null;
-
             // 1.14.4+ clients don't send another start break in protected regions
             if (player.getClientVersion().isOlderThan(ClientVersion.V_1_14_4)) {
+                lastCancelledBlock = null;
                 lastLastBlock = null;
                 lastBlock = null;
             }

common/src/main/java/ac/grim/grimac/checks/impl/combat/Hitboxes.java

@@ -0,0 +1,13 @@
+package ac.grim.grimac.checks.impl.combat;
+
+import ac.grim.grimac.checks.Check;
+import ac.grim.grimac.checks.CheckData;
+import ac.grim.grimac.checks.type.PacketCheck;
+import ac.grim.grimac.player.GrimPlayer;
+
+@CheckData(name = "Hitboxes", setback = 10)
+public class Hitboxes extends Check implements PacketCheck {
+    public Hitboxes(GrimPlayer player) {
+        super(player);
+    }
+}

common/src/main/java/ac/grim/grimac/checks/impl/combat/MultiInteractA.java

@@ -0,0 +1,68 @@
+package ac.grim.grimac.checks.impl.combat;
+
+import ac.grim.grimac.checks.Check;
+import ac.grim.grimac.checks.CheckData;
+import ac.grim.grimac.checks.type.PostPredictionCheck;
+import ac.grim.grimac.player.GrimPlayer;
+import ac.grim.grimac.utils.anticheat.update.PredictionComplete;
+import com.github.retrooper.packetevents.event.PacketReceiveEvent;
+import com.github.retrooper.packetevents.protocol.packettype.PacketType;
+import com.github.retrooper.packetevents.protocol.player.GameMode;
+import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientInteractEntity;
+
+import java.util.ArrayList;
+
+@CheckData(name = "MultiInteractA", description = "Interacted with multiple entities in the same tick", experimental = true)
+public class MultiInteractA extends Check implements PostPredictionCheck {
+    private final ArrayList<String> flags = new ArrayList<>();
+    private int lastEntity;
+    private boolean lastSneaking;
+    private boolean hasInteracted = false;
+
+    public MultiInteractA(final GrimPlayer player) {
+        super(player);
+    }
+
+    @Override
+    public void onPacketReceive(PacketReceiveEvent event) {
+        if (event.getPacketType() == PacketType.Play.Client.INTERACT_ENTITY) {
+            WrapperPlayClientInteractEntity packet = new WrapperPlayClientInteractEntity(event);
+            int entity = packet.getEntityId();
+            boolean sneaking = packet.isSneaking().orElse(false);
+
+            if (hasInteracted && entity != lastEntity) {
+                String verbose = "lastEntity=" + lastEntity + ", entity=" + entity
+                        + ", lastSneaking=" + lastSneaking + ", sneaking=" + sneaking;
+                if (!player.canSkipTicks()) {
+                    if (flagAndAlert(verbose) && shouldModifyPackets()) {
+                        event.setCancelled(true);
+                        player.onPacketCancel();
+                    }
+                } else {
+                    flags.add(verbose);
+                }
+            }
+
+            lastEntity = entity;
+            lastSneaking = sneaking;
+            hasInteracted = true;
+        }
+
+        if (player.gamemode == GameMode.SPECTATOR || isTickPacket(event.getPacketType())) {
+            hasInteracted = false;
+        }
+    }
+
+    @Override
+    public void onPredictionComplete(PredictionComplete predictionComplete) {
+        if (!player.canSkipTicks()) return;
+
+        if (player.isTickingReliablyFor(3)) {
+            for (String verbose : flags) {
+                flagAndAlert(verbose);
+            }
+        }
+
+        flags.clear();
+    }
+}

common/src/main/java/ac/grim/grimac/checks/impl/combat/MultiInteractB.java

@@ -0,0 +1,69 @@
+package ac.grim.grimac.checks.impl.combat;
+
+import ac.grim.grimac.checks.Check;
+import ac.grim.grimac.checks.CheckData;
+import ac.grim.grimac.checks.type.PostPredictionCheck;
+import ac.grim.grimac.player.GrimPlayer;
+import ac.grim.grimac.utils.anticheat.MessageUtil;
+import ac.grim.grimac.utils.anticheat.update.PredictionComplete;
+import com.github.retrooper.packetevents.event.PacketReceiveEvent;
+import com.github.retrooper.packetevents.protocol.packettype.PacketType;
+import com.github.retrooper.packetevents.protocol.player.GameMode;
+import com.github.retrooper.packetevents.util.Vector3f;
+import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientInteractEntity;
+
+import java.util.ArrayList;
+
+@CheckData(name = "MultiInteractB", experimental = true)
+public class MultiInteractB extends Check implements PostPredictionCheck {
+    private final ArrayList<String> flags = new ArrayList<>();
+    private Vector3f lastPos;
+    private boolean hasInteracted = false;
+
+    public MultiInteractB(final GrimPlayer player) {
+        super(player);
+    }
+
+    @Override
+    public void onPacketReceive(PacketReceiveEvent event) {
+        if (event.getPacketType() == PacketType.Play.Client.INTERACT_ENTITY) {
+            Vector3f pos = new WrapperPlayClientInteractEntity(event).getTarget().orElse(null);
+
+            if (pos == null) {
+                return;
+            }
+
+            if (hasInteracted && !pos.equals(lastPos)) {
+                String verbose = "pos=" + MessageUtil.toUnlabledString(pos) + ", lastPos=" + MessageUtil.toUnlabledString(lastPos);
+                if (!player.canSkipTicks()) {
+                    if (flagAndAlert(verbose) && shouldModifyPackets()) {
+                        event.setCancelled(true);
+                        player.onPacketCancel();
+                    }
+                } else {
+                    flags.add(verbose);
+                }
+            }
+
+            lastPos = pos;
+            hasInteracted = true;
+        }
+
+        if (player.gamemode == GameMode.SPECTATOR || isTickPacket(event.getPacketType())) {
+            hasInteracted = false;
+        }
+    }
+
+    @Override
+    public void onPredictionComplete(PredictionComplete predictionComplete) {
+        if (!player.canSkipTicks()) return;
+
+        if (player.isTickingReliablyFor(3)) {
+            for (String verbose : flags) {
+                flagAndAlert(verbose);
+            }
+        }
+
+        flags.clear();
+    }
+}

common/src/main/java/ac/grim/grimac/checks/impl/combat/Reach.java

@@ -15,6 +15,7 @@
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 package ac.grim.grimac.checks.impl.combat;
 
+import ac.grim.grimac.api.config.ConfigManager;
 import ac.grim.grimac.checks.Check;
 import ac.grim.grimac.checks.CheckData;
 import ac.grim.grimac.checks.type.PacketCheck;
@@ -22,6 +23,7 @@ import ac.grim.grimac.player.GrimPlayer;
 import ac.grim.grimac.utils.collisions.datatypes.SimpleCollisionBox;
 import ac.grim.grimac.utils.data.packetentity.PacketEntity;
 import ac.grim.grimac.utils.data.packetentity.dragon.PacketEntityEnderDragonPart;
+import ac.grim.grimac.utils.math.Vector3dm;
 import ac.grim.grimac.utils.nmsutil.ReachUtils;
 import com.github.retrooper.packetevents.event.PacketReceiveEvent;
 import com.github.retrooper.packetevents.protocol.attribute.Attributes;
@@ -32,22 +34,27 @@ import com.github.retrooper.packetevents.protocol.player.ClientVersion;
 import com.github.retrooper.packetevents.protocol.player.GameMode;
 import com.github.retrooper.packetevents.util.Vector3d;
 import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientInteractEntity;
-import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientPlayerFlying;
-import org.bukkit.util.Vector;
+import it.unimi.dsi.fastutil.ints.Int2ObjectMap;
+import it.unimi.dsi.fastutil.ints.Int2ObjectOpenHashMap;
+import org.jetbrains.annotations.NotNull;
 
-import java.util.*;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
 
 // You may not copy the check unless you are licensed under GPL
-@CheckData(name = "Reach", configName = "Reach", setback = 10)
+@CheckData(name = "Reach", setback = 10)
 public class Reach extends Check implements PacketCheck {
-    // Only one flag per reach attack, per entity, per tick.
-    // We store position because lastX isn't reliable on teleports.
-    private final Map<Integer, Vector3d> playerAttackQueue = new HashMap<>();
+
     private static final List<EntityType> blacklisted = Arrays.asList(
             EntityTypes.BOAT,
             EntityTypes.CHEST_BOAT,
             EntityTypes.SHULKER);
-
+    private static final CheckResult NONE = new CheckResult(ResultType.NONE, "");
+    // Only one flag per reach attack, per entity, per tick.
+    // We store position because lastX isn't reliable on teleports.
+    private final Int2ObjectMap<Vector3d> playerAttackQueue = new Int2ObjectOpenHashMap<>();
     private boolean cancelImpossibleHits;
     private double threshold;
     private double cancelBuffer; // For the next 4 hits after using reach, we aggressively cancel reach
@@ -80,15 +87,17 @@ public class Reach extends Check implements PacketCheck {
                 }
                 return;
             }
-            
+
             // Dead entities cause false flags (https://github.com/GrimAnticheat/Grim/issues/546)
             if (entity.isDead) return;
 
             // TODO: Remove when in front of via
-            if (entity.getType() == EntityTypes.ARMOR_STAND && player.getClientVersion().isOlderThan(ClientVersion.V_1_8)) return;
+            if (entity.getType() == EntityTypes.ARMOR_STAND && player.getClientVersion().isOlderThan(ClientVersion.V_1_8))
+                return;
 
-            if (player.gamemode == GameMode.CREATIVE || player.gamemode == GameMode.SPECTATOR) return;
-            if (player.compensatedEntities.getSelf().inVehicle()) return;
+            if (player.gamemode == GameMode.CREATIVE || player.gamemode == GameMode.SPECTATOR)
+                return;
+            if (player.inVehicle()) return;
             if (entity.riding != null) return;
 
             boolean tooManyAttacks = playerAttackQueue.size() > 10;
@@ -105,9 +114,7 @@ public class Reach extends Check implements PacketCheck {
         }
 
         // If the player set their look, or we know they have a new tick
-        if (WrapperPlayClientPlayerFlying.isFlying(event.getPacketType()) ||
-                event.getPacketType() == PacketType.Play.Client.PONG ||
-                event.getPacketType() == PacketType.Play.Client.WINDOW_CONFIRMATION) {
+        if (isUpdate(event.getPacketType())) {
             tickBetterReachCheckWithAngle();
         }
     }
@@ -125,39 +132,46 @@ public class Reach extends Check implements PacketCheck {
         if ((blacklisted.contains(reachEntity.getType()) || !reachEntity.isLivingEntity()) && reachEntity.getType() != EntityTypes.END_CRYSTAL)
             return false; // exempt
 
-        if (player.gamemode == GameMode.CREATIVE || player.gamemode == GameMode.SPECTATOR) return false;
-        if (player.compensatedEntities.getSelf().inVehicle()) return false;
+        if (player.gamemode == GameMode.CREATIVE || player.gamemode == GameMode.SPECTATOR)
+            return false;
+        if (player.inVehicle()) return false;
 
         // Filter out what we assume to be cheats
         if (cancelBuffer != 0) {
-            return checkReach(reachEntity, new Vector3d(player.x, player.y, player.z), true) != null; // If they flagged
+            CheckResult result = checkReach(reachEntity, new Vector3d(player.x, player.y, player.z), true);
+            return result.isFlag(); // If they flagged
         } else {
             SimpleCollisionBox targetBox = reachEntity.getPossibleCollisionBoxes();
             if (reachEntity.getType() == EntityTypes.END_CRYSTAL) {
                 targetBox = new SimpleCollisionBox(reachEntity.trackedServerPosition.getPos().subtract(1, 0, 1), reachEntity.trackedServerPosition.getPos().add(1, 2, 1));
             }
-            return ReachUtils.getMinReachToBox(player, targetBox) > player.compensatedEntities.getSelf().getAttributeValue(Attributes.PLAYER_ENTITY_INTERACTION_RANGE);
+            return ReachUtils.getMinReachToBox(player, targetBox) > player.compensatedEntities.self.getAttributeValue(Attributes.ENTITY_INTERACTION_RANGE);
         }
     }
 
     private void tickBetterReachCheckWithAngle() {
-        for (Map.Entry<Integer, Vector3d> attack : playerAttackQueue.entrySet()) {
-            PacketEntity reachEntity = player.compensatedEntities.entityMap.get(attack.getKey().intValue());
-            if (reachEntity != null) {
-                String result = checkReach(reachEntity, attack.getValue(), false);
-                if (result != null) {
-                    if (reachEntity.getType() == EntityTypes.PLAYER) {
-                        flagAndAlert(result);
-                    } else {
-                        flagAndAlert(result + " type=" + reachEntity.getType().getName().getKey());
-                    }
+        for (Int2ObjectMap.Entry<Vector3d> attack : playerAttackQueue.int2ObjectEntrySet()) {
+            PacketEntity reachEntity = player.compensatedEntities.entityMap.get(attack.getIntKey());
+            if (reachEntity == null) continue;
+
+            CheckResult result = checkReach(reachEntity, attack.getValue(), false);
+            switch (result.type()) {
+                case REACH -> {
+                    String added = reachEntity.getType() == EntityTypes.PLAYER ? "" : ", type=" + reachEntity.getType().getName().getKey();
+                    flagAndAlert(result.verbose() + added);
+                }
+                case HITBOX -> {
+                    String added = reachEntity.getType() == EntityTypes.PLAYER ? "" : "type=" + reachEntity.getType().getName().getKey();
+                    player.checkManager.getPacketCheck(Hitboxes.class).flagAndAlert(result.verbose() + added);
                 }
             }
         }
+
         playerAttackQueue.clear();
     }
 
-    private String checkReach(PacketEntity reachEntity, Vector3d from, boolean isPrediction) {
+    @NotNull
+    private CheckResult checkReach(PacketEntity reachEntity, Vector3d from, boolean isPrediction) {
         SimpleCollisionBox targetBox = reachEntity.getPossibleCollisionBoxes();
 
         if (reachEntity.getType() == EntityTypes.END_CRYSTAL) { // Hardcode end crystal box
@@ -176,13 +190,14 @@ public class Reach extends Check implements PacketCheck {
         // Adds some more than 0.03 uncertainty in some cases, but a good trade off for simplicity
         //
         // Just give the uncertainty on 1.9+ clients as we have no way of knowing whether they had 0.03 movement
-        if (!player.packetStateData.didLastLastMovementIncludePosition || player.getClientVersion().isNewerThanOrEquals(ClientVersion.V_1_9))
+        // However, on 1.21.2+ we do know if they had 0.03 movement
+        if (!player.packetStateData.didLastLastMovementIncludePosition || player.canSkipTicks())
             targetBox.expand(player.getMovementThreshold());
 
         double minDistance = Double.MAX_VALUE;
 
         // https://bugs.mojang.com/browse/MC-67665
-        List<Vector> possibleLookDirs = new ArrayList<>(Collections.singletonList(ReachUtils.getLook(player, player.xRot, player.yRot)));
+        List<Vector3dm> possibleLookDirs = new ArrayList<>(Collections.singletonList(ReachUtils.getLook(player, player.xRot, player.yRot)));
 
         // If we are a tick behind, we don't know their next look so don't bother doing this
         if (!isPrediction) {
@@ -199,14 +214,17 @@ public class Reach extends Check implements PacketCheck {
             }
         }
 
+        final double maxReach = player.compensatedEntities.self.getAttributeValue(Attributes.ENTITY_INTERACTION_RANGE);
         // +3 would be 3 + 3 = 6, which is the pre-1.20.5 behaviour, preventing "Missed Hitbox"
-        final double distance = player.compensatedEntities.getSelf().getAttributeValue(Attributes.PLAYER_ENTITY_INTERACTION_RANGE) + 3;
-        for (Vector lookVec : possibleLookDirs) {
-            for (double eye : player.getPossibleEyeHeights()) {
-                Vector eyePos = new Vector(from.getX(), from.getY() + eye, from.getZ());
-                Vector endReachPos = eyePos.clone().add(new Vector(lookVec.getX() * distance, lookVec.getY() * distance, lookVec.getZ() * distance));
+        final double distance = maxReach + 3;
+        final double[] possibleEyeHeights = player.getPossibleEyeHeights();
+        final Vector3dm eyePos = new Vector3dm(from.getX(), 0, from.getZ());
+        for (Vector3dm lookVec : possibleLookDirs) {
+            for (double eye : possibleEyeHeights) {
+                eyePos.setY(from.getY() + eye);
+                Vector3dm endReachPos = eyePos.clone().add(new Vector3dm(lookVec.getX() * distance, lookVec.getY() * distance, lookVec.getZ() * distance));
 
-                Vector intercept = ReachUtils.calculateIntercept(targetBox, eyePos, endReachPos).getFirst();
+                Vector3dm intercept = ReachUtils.calculateIntercept(targetBox, eyePos, endReachPos).first();
 
                 if (ReachUtils.isVecInside(targetBox, eyePos)) {
                     minDistance = 0;
@@ -223,22 +241,31 @@ public class Reach extends Check implements PacketCheck {
         if ((!blacklisted.contains(reachEntity.getType()) && reachEntity.isLivingEntity()) || reachEntity.getType() == EntityTypes.END_CRYSTAL) {
             if (minDistance == Double.MAX_VALUE) {
                 cancelBuffer = 1;
-                return "Missed hitbox";
-            } else if (minDistance > player.compensatedEntities.getSelf().getAttributeValue(Attributes.PLAYER_ENTITY_INTERACTION_RANGE)) {
+                return new CheckResult(ResultType.HITBOX, "");
+            } else if (minDistance > maxReach) {
                 cancelBuffer = 1;
-                return String.format("%.5f", minDistance) + " blocks";
+                return new CheckResult(ResultType.REACH, String.format("%.5f", minDistance) + " blocks");
             } else {
                 cancelBuffer = Math.max(0, cancelBuffer - 0.25);
             }
         }
 
-        return null;
+        return NONE;
     }
 
     @Override
-    public void reload() {
-        super.reload();
-        this.cancelImpossibleHits = getConfig().getBooleanElse("Reach.block-impossible-hits", true);
-        this.threshold = getConfig().getDoubleElse("Reach.threshold", 0.0005);
+    public void onReload(ConfigManager config) {
+        this.cancelImpossibleHits = config.getBooleanElse("Reach.block-impossible-hits", true);
+        this.threshold = config.getDoubleElse("Reach.threshold", 0.0005);
+    }
+
+    private enum ResultType {
+        REACH, HITBOX, NONE
+    }
+
+    private record CheckResult(ResultType type, String verbose) {
+        public boolean isFlag() {
+            return type != ResultType.NONE;
+        }
     }
 }

common/src/main/java/ac/grim/grimac/checks/impl/crash/CrashB.java

@@ -8,7 +8,7 @@ import com.github.retrooper.packetevents.event.PacketReceiveEvent;
 import com.github.retrooper.packetevents.protocol.packettype.PacketType;
 import com.github.retrooper.packetevents.protocol.player.GameMode;
 
-@CheckData(name = "CrashB")
+@CheckData(name = "CrashB", description = "Sent creative mode inventory click packets while not in creative mode")
 public class CrashB extends Check implements PacketCheck {
     public CrashB(GrimPlayer player) {
         super(player);
@@ -18,7 +18,6 @@ public class CrashB extends Check implements PacketCheck {
     public void onPacketReceive(PacketReceiveEvent event) {
         if (event.getPacketType() == PacketType.Play.Client.CREATIVE_INVENTORY_ACTION) {
             if (player.gamemode != GameMode.CREATIVE) {
-                player.getSetbackTeleportUtil().executeViolationSetback();
                 event.setCancelled(true);
                 player.onPacketCancel();
                 flagAndAlert(); // Could be transaction split, no need to setback though