Integration tests against real server

Fix race error in bulk update integration test
Use driver class instead of datasource for Postgres (#3705 )
2023-09-22 20:41:48 +01:00 · 2023-08-05 10:49:57 +01:00 · 2023-08-05 10:28:01 +01:00 · 2023-08-05 10:09:30 +01:00 · 2023-08-05 09:49:56 +01:00 · 2023-06-25 22:36:31 +01:00
1092 changed files with 122082 additions and 3995 deletions
@@ -0,0 +1,2 @@
+github: lucko
+patreon: luckdev
@@ -0,0 +1,63 @@
+name: 🐛  Bug report
+description: Report an issue or problem with the way LuckPerms is functioning.
+labels: ["type: issue"]
+body:
+  - type: markdown
+    attributes:
+      value: "Before going any further, please check to see if your problem is fixed by updating to a newer version. The latest development builds can be obtained from https://luckperms.net/download"
+  - type: textarea
+    id: description
+    attributes:
+      label: Description
+      description: Please provide a short description of the issue in the space below.
+      placeholder: Description goes here!
+    validations:
+      required: true
+  - type: textarea
+    id: reproduction-steps
+    attributes:
+      label: Reproduction Steps
+      description: Please provide a clear list of steps we should follow in order to reproduce your issue in the space below.
+      placeholder: List reproduction steps here, please!
+    validations:
+      required: true
+  - type: textarea
+    id: expected-behaviour
+    attributes:
+      label: Expected Behaviour
+      description: Please provide a description of what you expected to happen.
+      placeholder: Describe what you expected to happen here.
+    validations:
+      required: true
+  - type: input
+    id: server-info
+    attributes:
+      label: Server Details
+      description: Please provide a description of the server details, including type and specific version number.
+      placeholder: 'git-Paper-124 (MC: 1.17.1)'
+    validations:
+      required: true
+  - type: input
+    id: luckperms-version
+    attributes:
+      label: LuckPerms Version
+      description: Please provide the specific, precise version number of LuckPerms you are using to reproduce this bug.
+      placeholder: v5.3.70
+    validations:
+      required: true
+  - type: textarea
+    id: logs
+    attributes:
+      label: Logs and Configs
+      description: If you think it would be helpful, please also include a pastebin of any relevant config files or log output. You should use https://gist.github.com/ to upload, then include the link below. 
+      placeholder: https://gist.github.com/HelpfulBugReporter/ThisIsAVeryUsefulLogOutput
+    validations:
+      required: false
+  - type: textarea
+    id: extra-info
+    attributes:
+      label: Extra Details
+      description: Please include any other relevant details in the space below.
+      placeholder: I was able to reproduce this only at the end of a rainbow.
+    validations:
+      required: false
@@ -0,0 +1,5 @@
+blank_issues_enabled: false
+contact_links:
+  - name: 💬  Ask a question
+    url: https://discord.gg/luckperms
+    about: We use Discord to provide support for the project. If you have a question, need help, or aren't sure if you've found a bug or not, please come and talk to us there!
@@ -0,0 +1,31 @@
+name: 💡  Suggestion
+description: Suggest an idea for an improvement or change to LuckPerms.
+labels: ["type: suggestion"]
+body:
+  - type: markdown
+    attributes:
+      value: "Before going any further, please check to see if your suggestion has already been added by checking the [wiki](https://luckperms.net/wiki/Home). The latest development builds can be obtained from https://luckperms.net/download"
+  - type: textarea
+    id: description
+    attributes:
+      label: Description
+      description: Please provide a short description of your suggestion in the space below.
+      placeholder: Hello, perhaps you should...
+    validations:
+      required: true
+  - type: textarea
+    id: proposed-behaviour
+    attributes:
+      label: Proposed Behaviour
+      description: Please provide a short explanation of how the feature should work / be changed, and how this will affect the project.
+      placeholder: It would...
+    validations:
+      required: true
+  - type: textarea
+    id: extra-info
+    attributes:
+      label: Extra Details
+      description: Please include any other relevant details in the space below.
+      placeholder: I think this should only function at the end of a rainbow.
+    validations:
+      required: false
@@ -0,0 +1,127 @@
+name: Build Gradle and Publish Docker image
+
+on:
+  push:
+    branches:
+      - 'master'
+    tags:
+      - 'v*'
+  pull_request:
+    branches:
+      - 'master'
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+  build-gradle:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+
+      - name: validate gradle wrapper
+        uses: gradle/wrapper-validation-action@v1
+
+      - uses: actions/setup-java@v3
+        with:
+          distribution: 'temurin'
+          java-version: '17'
+
+      - name: Setup Gradle
+        uses: gradle/gradle-build-action@v2
+
+      - name: Run build and tests with Gradle wrapper
+        run: ./gradlew test build -PdockerTests
+
+      - name: Publish test report
+        uses: mikepenz/action-junit-report@v3
+        if: success() || failure()
+        with:
+          report_paths: '**/build/test-results/test/TEST-*.xml'
+          annotate_notice: true
+          detailed_summary: true
+
+      - name: Upload all artifacts
+        uses: actions/upload-artifact@v3
+        with:
+          name: jars
+          path: |
+            bukkit/loader/build/libs/LuckPerms-Bukkit-*.jar
+            bukkit-legacy/loader/build/libs/LuckPerms-Bukkit-Legacy-*.jar
+            bungee/loader/build/libs/LuckPerms-Bungee-*.jar
+            sponge/loader/build/libs/LuckPerms-Sponge-*.jar
+            nukkit/loader/build/libs/LuckPerms-Nukkit-*.jar
+            velocity/build/libs/LuckPerms-Velocity-*.jar
+            fabric/build/libs/LuckPerms-Fabric-*.jar
+            forge/loader/build/libs/LuckPerms-Forge-*.jar
+            standalone/loader/build/libs/LuckPerms-Standalone-*.jar
+
+      - name: Upload standalone artifact
+        uses: actions/upload-artifact@v3
+        with:
+          name: standalone-binary
+          path: standalone/loader/build/libs/LuckPerms-Standalone-*.jar
+
+
+  build-docker:
+    needs: build-gradle
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+
+      - name: Retrieve saved standalone jar artifact
+        uses: actions/download-artifact@v3
+        with:
+          name: standalone-binary
+          path: standalone/docker/
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v1
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+
+      - name: Log in to the Container registry
+        uses: docker/login-action@v1
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Determine the LuckPerms version
+        run: |
+          echo "luckperms_version=$(git describe --tags | awk -F "-" '{print $1 "." $2}')" >> "$GITHUB_ENV"
+
+      - name: Extract metadata for Docker
+        id: meta
+        uses: docker/metadata-action@v3
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          flavor: |
+            latest=${{ github.ref == 'refs/heads/master' }}
+          tags: |
+            type=schedule
+            type=ref,event=branch
+            type=ref,event=tag
+            type=ref,event=pr
+            type=raw,enable=${{ github.ref == 'refs/heads/master' }},value=${{ env.luckperms_version }}
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v2
+        with:
+          context: standalone/docker/
+          platforms: linux/amd64,linux/arm64
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
@@ -1,37 +1,80 @@
-# built application files
-*.jar
+### LuckPerms Standalone ###
+standalone/loader/data/

-# Java class files
-*.class
-
-# Local configuration file (sdk path, etc)
-logs/
-
-# Eclipse project files
-.classpath
-.project
-
-# Intellij project files
-*.iml
-*.ipr
-*.iws
-.idea/
-
-# Gradle
-.gradletasknamecache
+### Gradle & IntelliJ ###
 .gradle/
+/.idea/
 build/
-bin/
-gradle/
-gradlew*
+out/
+run/
+*.iml
+.idea_modules/

-# Maven
-target/
-pom.xml.tag
-pom.xml.releaseBackup
-pom.xml.versionsBackup
-pom.xml.next
-release.properties
-dependency-reduced-pom.xml
-buildNumber.properties
-.mvn/timing.properties
+
+### Eclipse ###
+.metadata
+bin/
+tmp/
+*.tmp
+*.bak
+*.swp
+*~.nib
+local.properties
+.settings/
+.loadpath
+.recommenders
+.externalToolBuilders/
+*.launch
+.factorypath
+.recommenders/
+.apt_generated/
+.project
+.classpath
+
+
+### Linux ###
+*~
+.fuse_hidden*
+.directory
+.Trash-*
+.nfs*
+
+
+### macOS ###
+.DS_Store
+.AppleDouble
+.LSOverride
+Icon
+._*
+.DocumentRevisions-V100
+.fseventsd
+.Spotlight-V100
+.TemporaryItems
+.Trashes
+.VolumeIcon.icns
+.com.apple.timemachine.donotpresent
+.AppleDB
+.AppleDesktop
+Network Trash Folder
+Temporary Items
+.apdisk
+
+
+### NetBeans ###
+nbproject/private/
+build/
+nbbuild/
+dist/
+nbdist/
+.nb-gradle/
+
+
+### Windows ###
+# Windows thumbnail cache files
+Thumbs.db
+ehthumbs.db
+ehthumbs_vista.db
+*.stackdump
+[Dd]esktop.ini
+$RECYCLE.BIN/
+*.lnk
@@ -0,0 +1,26 @@
+### :speech_balloon: Looking for support?
+
+Details about support for the project can be found [here, on the Wiki Homepage](https://luckperms.net/wiki/Home#support).
+
+### :bug: Reporting bugs?
+
+Before reporting a bug or issue, please make sure that the issue is actually being caused by or related to LuckPerms. We get a lot of reports which are caused by other software - please double check!
+
+If you're unsure, feel free to ask using the above resources BEFORE making a report.
+
+Bugs or issues should be reported using the [GitHub Issues tab](https://github.com/LuckPerms/LuckPerms/issues).
+
+### :pencil: Want to contribute code?
+#### Pull Requests
+If you make any changes or improvements to the plugin which you think would be beneficial to others, please consider making a pull request to merge your changes back into the upstream project. (especially if your changes are bug fixes!)
+
+LuckPerms loosely follows the [Google Java Style Guide](https://google.github.io/styleguide/javaguide.html). Generally, try to copy the style of code found in the class you're editing. 
+
+If you're considering submitting a substantial pull request, please open an issue so we can discuss the change before starting work on the contribution. Most pull requests are happily accepted, but larger changes may have an impact on the maintainability of the project, and require more consideration. 
+
+#### Project Layout
+The project is split up into a few separate modules.
+
+* **API** - The public, semantically versioned API used by other plugins wishing to integrate with and retrieve data from LuckPerms. This module (for the most part) does not contain any implementation itself, and is provided by the plugin.
+* **Common** - The common module contains most of the code which implements the respective LuckPerms plugins. This abstract module reduces duplicated code throughout the project.
+* **Bukkit, BungeeCord, Fabric, Forge, Nukkit, Sponge & Velocity** - Each use the common module to implement plugins on the respective server platforms.
@@ -0,0 +1,22 @@
+This file is part of LuckPerms, licensed under the MIT License.
+
+ Copyright (c) lucko (Luck) <luck@lucko.me>
+ Copyright (c) contributors
+
+ Permission is hereby granted, free of charge, to any person obtaining a copy
+ of this software and associated documentation files (the "Software"), to deal
+ in the Software without restriction, including without limitation the rights
+ to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ copies of the Software, and to permit persons to whom the Software is
+ furnished to do so, subject to the following conditions:
+
+ The above copyright notice and this permission notice shall be included in all
+ copies or substantial portions of the Software.
+
+ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ SOFTWARE.
@@ -1,6 +1,7 @@
 MIT License

-Copyright (c) 2016 Luck
+Copyright (c) lucko (Luck) <luck@lucko.me>
+Copyright (c) contributors

 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
@@ -18,4 +19,4 @@ FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.
+SOFTWARE.
@@ -1,28 +1,59 @@
+![](https://raw.githubusercontent.com/LuckPerms/branding/master/banner/banner.png "Banner")
 # LuckPerms
-A quite possibly shit™ permissions implementation for Bukkit/BungeeCord.
+[![Build Status](https://ci.lucko.me/job/LuckPerms/badge/icon)](https://ci.lucko.me/job/LuckPerms/)
+[![javadoc](https://javadoc.io/badge2/net.luckperms/api/javadoc.svg)](https://javadoc.io/doc/net.luckperms/api)
+[![Maven Central](https://img.shields.io/maven-metadata/v/https/repo1.maven.org/maven2/net/luckperms/api/maven-metadata.xml.svg?label=maven%20central&colorB=brightgreen)](https://search.maven.org/artifact/net.luckperms/api)
+[![Discord](https://img.shields.io/discord/241667244927483904.svg?label=discord&logo=discord)](https://discord.gg/luckperms)

-### Why?
-Yeah, I don't know. There are other more advanced, optimized, better programmed and thoroughly tested alternative plugins around, you should probably use those instead. I just wanted some specific features, and something that was compatible with BungeeCord.
+LuckPerms is a permissions plugin for Minecraft servers. It allows server admins to control what features players can use by creating groups and assigning permissions.

-### Features
- - **Group inheritance** - users can be members of multiple groups, groups can inherit other groups
- - **Multi-server support** - data is synced across all servers/platforms
- - **Per-server permissions/groups** - define permissions that only apply on certain servers
- - **Vault Support** - hooks into Vault to integrate with other plugins
- - **Everything is configured using commands** - no editing yml files, yuck
- - **Efficient** - maybe? Who knows, it might be.
- - **BungeeCord compatible** - my main motive for making this was that all other Bungee/Bukkit compatible perms plugins are utter aids. (At least, I couldn't find any decent ones)
+The latest downloads, wiki & other useful links can be found on the project homepage at [luckperms.net](https://luckperms.net/).

-### Caveats
- - Only supports MySQL
- - Not at all tested and could be super unreliable
- - It's quite possibly shit™
+It is:

-So, not anything major, really ¯\ _(ツ)_ /¯
+* **fast** - written with performance and scalability in mind.
+* **reliable** - trusted by thousands of server admins, and the largest of server networks.
+* **easy to use** - setup permissions using commands, directly in config files, or using the web editor.
+* **flexible** - supports a variety of data storage options, and works on lots of different server types.
+* **extensive** - a plethora of customization options and settings which can be changed to suit your server.
+* **free** - available for download and usage at no cost, and permissively licensed so it can remain free forever.

-### Commands
-Command usage is printed when you supply too little arguments.
+For more information, see the wiki article on [Why LuckPerms?](https://luckperms.net/wiki/Why-LuckPerms)

-Bukkit: `/luckperms` `/perms` `/permissions` `/lp` `/perm`
+## Building
+LuckPerms uses Gradle to handle dependencies & building.

-Bungee: `/luckpermsbungee` `/bperms` `/bpermissions` `/lpb` `/bperm`
+#### Requirements
+* Java 17 JDK or newer
+* Git
+
+#### Compiling from source
+```sh
+git clone https://github.com/LuckPerms/LuckPerms.git
+cd LuckPerms/
+./gradlew build
+```
+
+You can find the output jars in the `loader/build/libs` or `build/libs` directories.
+
+## Tests
+There are some automated tests which run during each build.
+
+* Unit tests are defined in [`common/src/test`](https://github.com/LuckPerms/LuckPerms/tree/master/common/src/test)
+* Integration tests are defined in [`standalone/src/test`](https://github.com/LuckPerms/LuckPerms/tree/master/standalone/src/test).
+
+## Contributing
+#### Pull Requests
+If you make any changes or improvements to the plugin which you think would be beneficial to others, please consider making a pull request to merge your changes back into the upstream project. (especially if your changes are bug fixes!)
+
+LuckPerms loosely follows the [Google Java Style Guide](https://google.github.io/styleguide/javaguide.html). Generally, try to copy the style of code found in the class you're editing. 
+
+#### Project Layout
+The project is split up into a few separate modules.
+
+* **API** - The public, semantically versioned API used by other plugins wishing to integrate with and retrieve data from LuckPerms. This module (for the most part) does not contain any implementation itself, and is provided by the plugin.
+* **Common** - The common module contains most of the code which implements the respective LuckPerms plugins. This abstract module reduces duplicated code throughout the project.
+* **Bukkit, BungeeCord, Fabric, Forge, Nukkit, Sponge & Velocity** - Each use the common module to implement plugins on the respective server platforms.
+
+## License
+LuckPerms is licensed under the permissive MIT license. Please see [`LICENSE.txt`](https://github.com/LuckPerms/LuckPerms/blob/master/LICENSE.txt) for more info.
@@ -0,0 +1,119 @@
+group = 'net.luckperms'
+project.version = '5.4'
+
+jar {
+    manifest {
+        attributes('Automatic-Module-Name': 'net.luckperms.api')
+    }
+}
+
+dependencies {
+    compileOnly 'org.checkerframework:checker-qual:3.21.2'
+    compileOnly 'org.jetbrains:annotations:23.1.0'
+}
+
+// Only used occasionally for deployment - not needed for normal builds.
+/*
+if (project.hasProperty('sonatypeUsername') && project.hasProperty('sonatypePassword')) {
+    apply plugin: 'signing'
+
+    javadoc {
+        title = 'LuckPerms API (v' + project.ext.apiVersion + ')'
+        options.overview = 'javadoc/overview.html'
+        options.encoding = 'UTF-8'
+        options.charSet = 'UTF-8'
+        options.links(
+                'https://checkerframework.org/api/',
+                'https://javadoc.io/static/org.jetbrains/annotations/23.0.0/'
+        )
+        options.addStringOption('Xdoclint:none', '-quiet')
+        options.addStringOption('-since', '5.0,5.1,5.2,5.3,5.4')
+
+        if (JavaVersion.current() > JavaVersion.VERSION_1_8) {
+            options.links.add('https://docs.oracle.com/en/java/javase/11/docs/api/')
+        } else {
+            options.links.add('https://docs.oracle.com/javase/8/docs/api/')
+        }
+    }
+
+    task javadocJar(type: Jar, dependsOn: javadoc) {
+        classifier 'javadoc'
+        from javadoc.destinationDir
+    }
+
+    task sourcesJar(type: Jar) {
+        classifier 'sources'
+        from sourceSets.main.allSource
+    }
+
+    artifacts {
+        archives javadocJar
+        archives sourcesJar
+    }
+
+    publishing {
+        repositories {
+            maven {
+                def releasesRepoUrl = 'https://oss.sonatype.org/service/local/staging/deploy/maven2/'
+                def snapshotsRepoUrl = 'https://oss.sonatype.org/content/repositories/snapshots/'
+                url = version.endsWith('SNAPSHOT') ? snapshotsRepoUrl : releasesRepoUrl
+
+                credentials {
+                    username sonatypeUsername
+                    password sonatypePassword
+                }
+            }
+        }
+
+        publications {
+            mavenJava(MavenPublication) {
+                artifactId = 'api'
+
+                from components.java
+                artifact sourcesJar
+                artifact javadocJar
+
+                pom {
+                    name = 'LuckPerms API'
+                    description = 'A permissions plugin for Minecraft servers.'
+                    url = 'https://luckperms.net'
+
+                    licenses {
+                        license {
+                            name = 'MIT'
+                            url = 'https://opensource.org/licenses/MIT'
+                        }
+                    }
+
+                    developers {
+                        developer {
+                            id = 'lucko'
+                            name = 'Luck'
+                            url = 'https://lucko.me'
+                            email = 'git@lucko.me'
+                        }
+                    }
+
+                    scm {
+                        connection = 'scm:git:https://github.com/LuckPerms/LuckPerms.git'
+                        developerConnection = 'scm:git:git@github.com:LuckPerms/LuckPerms.git'
+                        url = 'https://github.com/LuckPerms/LuckPerms'
+                    }
+
+                    issueManagement {
+                        system = 'GitHub'
+                        url = 'https://github.com/LuckPerms/LuckPerms/issues'
+                    }
+                }
+            }
+        }
+    }
+
+    signing {
+        useGpgCmd()
+        sign configurations.archives
+        sign publishing.publications.mavenJava
+        required = true
+    }
+}
+*/
@@ -0,0 +1,20 @@
+<body>
+<p>
+    LuckPerms is a permissions plugin for Minecraft servers. It allows server admins to control what
+    features players can use by creating groups and assigning permissions.
+</p>
+<h4>Useful Links</h4>
+<ul>
+    <li><a target="_top" href="https://luckperms.net">Project Website</a></li>
+    <li><a target="_top" href="https://luckperms.net/wiki/Developer-API">Wiki - API Introduction</a></li>
+    <li><a target="_top" href="https://luckperms.net/wiki/Developer-API-Usage">Wiki - API Usage</a></li>
+    <li><a target="_top" href="https://github.com/LuckPerms/LuckPerms">Source Code</a></li>
+</ul>
+<h4>Maven</h4>
+<p>
+    The API artifact is deployed to Maven Central with
+    <a target="_top" href="https://search.maven.org/artifact/net.luckperms/api">
+        group id: <b><code>net.luckperms</code></b>, artifact id: <b><code>api</code></b>.
+    </a>
+</p>
+</body>
@@ -0,0 +1,258 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api;
+
+import net.luckperms.api.actionlog.ActionLogger;
+import net.luckperms.api.context.ContextCalculator;
+import net.luckperms.api.context.ContextManager;
+import net.luckperms.api.event.EventBus;
+import net.luckperms.api.messaging.MessagingService;
+import net.luckperms.api.messenger.MessengerProvider;
+import net.luckperms.api.metastacking.MetaStackDefinition;
+import net.luckperms.api.metastacking.MetaStackElement;
+import net.luckperms.api.metastacking.MetaStackFactory;
+import net.luckperms.api.model.group.Group;
+import net.luckperms.api.model.group.GroupManager;
+import net.luckperms.api.model.user.User;
+import net.luckperms.api.model.user.UserManager;
+import net.luckperms.api.node.NodeBuilderRegistry;
+import net.luckperms.api.node.matcher.NodeMatcherFactory;
+import net.luckperms.api.platform.Platform;
+import net.luckperms.api.platform.PlayerAdapter;
+import net.luckperms.api.platform.PluginMetadata;
+import net.luckperms.api.query.QueryOptionsRegistry;
+import net.luckperms.api.track.Track;
+import net.luckperms.api.track.TrackManager;
+import org.checkerframework.checker.nullness.qual.NonNull;
+import org.jetbrains.annotations.ApiStatus.Internal;
+
+import java.util.Optional;
+import java.util.concurrent.CompletableFuture;
+
+/**
+ * The LuckPerms API.
+ *
+ * <p>The API allows other plugins on the server to read and modify LuckPerms
+ * data, change behaviour of the plugin, listen to certain events, and integrate
+ * LuckPerms into other plugins and systems.</p>
+ *
+ * <p>This interface represents the base of the API package. All functions are
+ * accessed via this interface.</p>
+ *
+ * <p>To start using the API, you need to obtain an instance of this interface.
+ * These are registered by the LuckPerms plugin to the platforms Services
+ * Manager. This is the preferred method for obtaining an instance.</p>
+ *
+ * <p>For ease of use, and for platforms without a Service Manager, an instance
+ * can also be obtained from the static singleton accessor in
+ * {@link LuckPermsProvider}.</p>
+ */
+public interface LuckPerms {
+
+    /**
+     * Gets the name of this server.
+     *
+     * <p>This is defined in the LuckPerms configuration file, and is used for
+     * server specific permission handling.</p>
+     *
+     * <p>The default server name is "global".</p>
+     *
+     * @return the server name
+     */
+    @NonNull String getServerName();
+
+    /**
+     * Gets the {@link UserManager}, responsible for managing
+     * {@link User} instances.
+     *
+     * <p>This manager can be used to retrieve instances of {@link User} by uuid
+     * or name, or query all loaded users.</p>
+     *
+     * @return the user manager
+     */
+    @NonNull UserManager getUserManager();
+
+    /**
+     * Gets the {@link GroupManager}, responsible for managing
+     * {@link Group} instances.
+     *
+     * <p>This manager can be used to retrieve instances of {@link Group} by
+     * name, or query all loaded groups.</p>
+     *
+     * @return the group manager
+     */
+    @NonNull GroupManager getGroupManager();
+
+    /**
+     * Gets the {@link TrackManager}, responsible for managing
+     * {@link Track} instances.
+     *
+     * <p>This manager can be used to retrieve instances of {@link Track} by
+     * name, or query all loaded tracks.</p>
+     *
+     * @return the track manager
+     */
+    @NonNull TrackManager getTrackManager();
+
+    /**
+     * Gets the {@link PlayerAdapter} instance, a utility class for adapting platform Player
+     * instances to {@link User}s.
+     *
+     * <p>The {@code playerClass} parameter must be equal to the class or interface used by the
+     * server platform to represent players.</p>
+     *
+     * <p>Specifically:</p>
+     *
+     * <p></p>
+     * <ul>
+     * <li>{@code org.bukkit.entity.Player}</li>
+     * <li>{@code net.md_5.bungee.api.connection.ProxiedPlayer}</li>
+     * <li>{@code org.spongepowered.api/entity.living.player.Player}</li>
+     * <li>{@code net.minecraft.server.network.ServerPlayerEntity} (Fabric)</li>
+     * <li>{@code cn.nukkit.Player}</li>
+     * <li>{@code com.velocitypowered.api.proxy.Player}</li>
+     * </ul>
+     *
+     * @param playerClass the class used by the platform to represent players
+     * @param <T> the player class type
+     * @return the player adapter
+     * @throws IllegalArgumentException if the player class is not correct
+     * @since 5.1
+     */
+    <T> @NonNull PlayerAdapter<T> getPlayerAdapter(@NonNull Class<T> playerClass);
+
+    /**
+     * Gets the {@link Platform}, which represents the server platform the
+     * plugin is running on.
+     *
+     * @return the platform
+     */
+    @NonNull Platform getPlatform();
+
+    /**
+     * Gets the {@link PluginMetadata}, responsible for providing metadata about
+     * the LuckPerms plugin currently running.
+     *
+     * @return the plugin metadata
+     */
+    @NonNull PluginMetadata getPluginMetadata();
+
+    /**
+     * Gets the {@link EventBus}, used for subscribing to internal LuckPerms
+     * events.
+     *
+     * @return the event bus
+     */
+    @NonNull EventBus getEventBus();
+
+    /**
+     * Gets the {@link MessagingService}, used to dispatch updates throughout a
+     * network of servers running the plugin.
+     *
+     * <p>Not all instances of LuckPerms will have a messaging service setup and
+     * configured.</p>
+     *
+     * @return the messaging service instance, if present.
+     */
+    @NonNull Optional<MessagingService> getMessagingService();
+
+    /**
+     * Gets the {@link ActionLogger}, responsible for saving and broadcasting
+     * defined actions occurring on the platform.
+     *
+     * @return the action logger
+     */
+    @NonNull ActionLogger getActionLogger();
+
+    /**
+     * Gets the {@link ContextManager}, responsible for managing
+     * {@link ContextCalculator}s, and calculating applicable contexts.
+     *
+     * @return the context manager
+     */
+    @NonNull ContextManager getContextManager();
+
+    /**
+     * Gets the {@link MetaStackFactory}.
+     *
+     * <p>The metastack factory provides methods for retrieving
+     * {@link MetaStackElement}s and constructing
+     * {@link MetaStackDefinition}s.</p>
+     *
+     * @return the meta stack factory
+     */
+    @NonNull MetaStackFactory getMetaStackFactory();
+
+    /**
+     * Schedules the execution of an update task, and returns an encapsulation
+     * of the task as a {@link CompletableFuture}.
+     *
+     * <p>The exact actions performed in an update task remains an
+     * implementation detail of the plugin, however, as a minimum, it is
+     * expected to perform a full reload of user, group and track data, and
+     * ensure that any changes are fully applied and propagated.</p>
+     *
+     * @return a future
+     */
+    @NonNull CompletableFuture<Void> runUpdateTask();
+
+    /**
+     * Registers a {@link MessengerProvider} for use by the platform.
+     *
+     * <p>Note that the mere action of registering a provider doesn't
+     * necessarily mean that it will be used.</p>
+     *
+     * @param messengerProvider the messenger provider.
+     */
+    void registerMessengerProvider(@NonNull MessengerProvider messengerProvider);
+
+    /**
+     * Gets the {@link NodeBuilderRegistry}.
+     *
+     * @return the node builder registry
+     */
+    @Internal
+    @NonNull NodeBuilderRegistry getNodeBuilderRegistry();
+
+    /**
+     * Gets the {@link QueryOptionsRegistry}.
+     *
+     * @return the query options registry
+     * @since 5.1
+     */
+    @Internal
+    @NonNull QueryOptionsRegistry getQueryOptionsRegistry();
+
+    /**
+     * Gets the {@link NodeMatcherFactory}.
+     *
+     * @return the node matcher factory
+     * @since 5.1
+     */
+    @Internal
+    @NonNull NodeMatcherFactory getNodeMatcherFactory();
+
+}
@@ -0,0 +1,89 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api;
+
+import org.checkerframework.checker.nullness.qual.NonNull;
+
+import static org.jetbrains.annotations.ApiStatus.Internal;
+
+/**
+ * Provides static access to the {@link LuckPerms} API.
+ *
+ * <p>Ideally, the ServiceManager for the platform should be used to obtain an
+ * instance, however, this provider can be used if this is not viable.</p>
+ */
+public final class LuckPermsProvider {
+    private static LuckPerms instance = null;
+
+    /**
+     * Gets an instance of the {@link LuckPerms} API,
+     * throwing {@link IllegalStateException} if the API is not loaded yet.
+     *
+     * <p>This method will never return null.</p>
+     *
+     * @return an instance of the LuckPerms API
+     * @throws IllegalStateException if the API is not loaded yet
+     */
+    public static @NonNull LuckPerms get() {
+        LuckPerms instance = LuckPermsProvider.instance;
+        if (instance == null) {
+            throw new NotLoadedException();
+        }
+        return instance;
+    }
+
+    @Internal
+    static void register(LuckPerms instance) {
+        LuckPermsProvider.instance = instance;
+    }
+
+    @Internal
+    static void unregister() {
+        LuckPermsProvider.instance = null;
+    }
+
+    @Internal
+    private LuckPermsProvider() {
+        throw new UnsupportedOperationException("This class cannot be instantiated.");
+    }
+
+    /**
+     * Exception thrown when the API is requested before it has been loaded.
+     */
+    private static final class NotLoadedException extends IllegalStateException {
+        private static final String MESSAGE = "The LuckPerms API isn't loaded yet!\n" +
+                "This could be because:\n" +
+                "  a) the LuckPerms plugin is not installed or it failed to enable\n" +
+                "  b) the plugin in the stacktrace does not declare a dependency on LuckPerms\n" +
+                "  c) the plugin in the stacktrace is retrieving the API before the plugin 'enable' phase\n" +
+                "     (call the #get method in onEnable, not the constructor!)\n";
+
+        NotLoadedException() {
+            super(MESSAGE);
+        }
+    }
+
+}
@@ -0,0 +1,207 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.actionlog;
+
+import net.luckperms.api.LuckPermsProvider;
+import org.checkerframework.checker.nullness.qual.NonNull;
+import org.checkerframework.checker.nullness.qual.Nullable;
+
+import java.time.Instant;
+import java.util.Optional;
+import java.util.UUID;
+
+/**
+ * Represents a logged action.
+ */
+public interface Action extends Comparable<Action> {
+
+    /**
+     * Gets a {@link Action.Builder}
+     *
+     * @return a new builder
+     */
+    static @NonNull Builder builder() {
+        return LuckPermsProvider.get().getActionLogger().actionBuilder();
+    }
+
+    /**
+     * Gets the time when the action occurred.
+     *
+     * @return the timestamp
+     */
+    @NonNull Instant getTimestamp();
+
+    /**
+     * Gets the source of the action.
+     *
+     * @return the source
+     */
+    @NonNull Source getSource();
+
+    /**
+     * Gets the target of the action.
+     *
+     * @return the target
+     */
+    @NonNull Target getTarget();
+
+    /**
+     * Returns a string describing the action which took place.
+     *
+     * <p>In most instances, this returns a variation of the command string which caused
+     * the change.</p>
+     *
+     * @return the action
+     */
+    @NonNull String getDescription();
+
+    /**
+     * Represents the source of an action.
+     */
+    interface Source {
+
+        /**
+         * Gets the source unique id.
+         *
+         * @return the source unique id
+         */
+        @NonNull UUID getUniqueId();
+
+        /**
+         * Gets the source name.
+         *
+         * @return the source name
+         */
+        @NonNull String getName();
+
+    }
+
+    /**
+     * Represents the target of an action.
+     */
+    interface Target {
+
+        /**
+         * Gets the target unique id.
+         *
+         * @return the target unique id
+         */
+        @NonNull Optional<UUID> getUniqueId();
+
+        /**
+         * Gets the target name.
+         *
+         * @return the target name
+         */
+        @NonNull String getName();
+
+        /**
+         * Gets the target type.
+         *
+         * @return the target type
+         */
+        @NonNull Type getType();
+
+        /**
+         * Represents the type of a {@link Target}.
+         */
+        enum Type {
+            USER, GROUP, TRACK
+        }
+    }
+
+    /**
+     * Builds an {@link Action} instance
+     */
+    interface Builder {
+
+        /**
+         * Sets the timestamp of the entry.
+         *
+         * @param timestamp the timestamp
+         * @return the builder
+         * @see Action#getTimestamp()
+         */
+        @NonNull Builder timestamp(@NonNull Instant timestamp);
+
+        /**
+         * Sets the actor of the entry.
+         *
+         * @param actor the actor
+         * @return the builder
+         */
+        @NonNull Builder source(@NonNull UUID actor);
+
+        /**
+         * Sets the actor name of the entry.
+         *
+         * @param actorName the actor name
+         * @return the builder
+         */
+        @NonNull Builder sourceName(@NonNull String actorName);
+
+        /**
+         * Sets the type of the entry.
+         *
+         * @param type the type
+         * @return the builder
+         */
+        @NonNull Builder targetType(Target.@NonNull Type type);
+
+        /**
+         * Sets the acted object for the entry.
+         *
+         * @param acted the acted object
+         * @return the builder
+         */
+        @NonNull Builder target(@Nullable UUID acted);
+
+        /**
+         * Sets the acted name for the entry.
+         *
+         * @param actedName the acted name
+         * @return the builder
+         */
+        @NonNull Builder targetName(@NonNull String actedName);
+
+        /**
+         * Sets the action of the entry.
+         *
+         * @param action the action
+         * @return the builder
+         */
+        @NonNull Builder description(@NonNull String action);
+
+        /**
+         * Creates a {@link Action} instance from the builder.
+         *
+         * @return a new log entry instance
+         */
+        @NonNull Action build();
+
+    }
+
+}
@@ -0,0 +1,85 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.actionlog;
+
+import org.checkerframework.checker.nullness.qual.NonNull;
+import org.jetbrains.annotations.Unmodifiable;
+
+import java.util.SortedSet;
+import java.util.UUID;
+
+/**
+ * Represents the internal LuckPerms log.
+ *
+ * <p>The returned instance provides a copy of the data at the time of retrieval.</p>
+ *
+ * <p>Any changes made to log entries will only apply to this instance of the log.
+ * You can add to the log using the {@link ActionLogger}, and then request an updated copy.</p>
+ *
+ * <p>All methods are thread safe, and return immutable and thread safe collections.</p>
+ */
+public interface ActionLog {
+
+    /**
+     * Gets the {@link Action}s that make up this log.
+     *
+     * @return the content
+     */
+    @NonNull @Unmodifiable SortedSet<Action> getContent();
+
+    /**
+     * Gets the entries in the log performed by the given actor.
+     *
+     * @param actor the uuid of the actor to filter by
+     * @return the content for the given actor
+     */
+    @NonNull @Unmodifiable SortedSet<Action> getContent(@NonNull UUID actor);
+
+    /**
+     * Gets the log content for a given user
+     *
+     * @param uniqueId the uuid to filter by
+     * @return all content in this log where the user = uuid
+     */
+    @NonNull @Unmodifiable SortedSet<Action> getUserHistory(@NonNull UUID uniqueId);
+
+    /**
+     * Gets the log content for a given group
+     *
+     * @param name the name to filter by
+     * @return all content in this log where the group = name
+     */
+    @NonNull @Unmodifiable SortedSet<Action> getGroupHistory(@NonNull String name);
+
+    /**
+     * Gets the log content for a given track
+     *
+     * @param name the name to filter by
+     * @return all content in this log where the track = name
+     */
+    @NonNull @Unmodifiable SortedSet<Action> getTrackHistory(@NonNull String name);
+
+}
@@ -0,0 +1,89 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.actionlog;
+
+import net.luckperms.api.messaging.MessagingService;
+import org.checkerframework.checker.nullness.qual.NonNull;
+
+import java.util.concurrent.CompletableFuture;
+
+/**
+ * Represents the object responsible for handling action logging.
+ */
+public interface ActionLogger {
+
+    /**
+     * Returns a new {@link Action.Builder} instance
+     *
+     * @return a new builder
+     */
+    Action.@NonNull Builder actionBuilder();
+
+    /**
+     * Gets a {@link ActionLog} instance from the plugin storage.
+     *
+     * @return a log instance
+     */
+    @NonNull CompletableFuture<ActionLog> getLog();
+
+    /**
+     * Submits a log entry to the plugin to be handled.
+     *
+     * <p>This method submits the log to the storage provider and broadcasts
+     * it.</p>
+     *
+     * <p>It is therefore roughly equivalent to calling
+     * {@link #submitToStorage(Action)} and {@link #broadcastAction(Action)},
+     * however, using this method is preferred to making the calls individually.</p>
+     *
+     * <p>If you want to submit a log entry but don't know which method to pick,
+     * use this one.</p>
+     *
+     * @param entry the entry to submit
+     * @return a future which will complete when the action is done
+     */
+    @NonNull CompletableFuture<Void> submit(@NonNull Action entry);
+
+    /**
+     * Submits a log entry to the plugins storage handler.
+     *
+     * @param entry the entry to submit
+     * @return a future which will complete when the action is done
+     */
+    @NonNull CompletableFuture<Void> submitToStorage(@NonNull Action entry);
+
+    /**
+     * Submits a log entry to the plugins log broadcasting handler.
+     *
+     * <p>If enabled, this method will also dispatch the log entry via the
+     * plugins {@link MessagingService}.</p>
+     *
+     * @param entry the entry to submit
+     * @return a future which will complete when the action is done
+     */
+    @NonNull CompletableFuture<Void> broadcastAction(@NonNull Action entry);
+
+}
@@ -0,0 +1,29 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+/**
+ * {@link net.luckperms.api.actionlog.ActionLog} related functionality.
+ */
+package net.luckperms.api.actionlog;
@@ -0,0 +1,47 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.cacheddata;
+
+import net.luckperms.api.query.QueryOptions;
+import org.checkerframework.checker.nullness.qual.NonNull;
+
+/**
+ * Holds cached lookup data for a given set of query options.
+ *
+ * <p>All calls will account for inheritance, as well as any default data
+ * provided by the platform. These calls are heavily cached and are therefore
+ * fast.</p>
+ */
+public interface CachedData {
+
+    /**
+     * Gets the query options this container is holding data for.
+     *
+     * @return the query options this container is caching
+     */
+    @NonNull QueryOptions getQueryOptions();
+
+}
@@ -0,0 +1,247 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.cacheddata;
+
+import net.luckperms.api.context.ContextManager;
+import net.luckperms.api.model.PermissionHolder;
+import net.luckperms.api.model.group.Group;
+import net.luckperms.api.model.user.User;
+import net.luckperms.api.query.QueryOptions;
+import org.checkerframework.checker.nullness.qual.NonNull;
+
+import java.util.concurrent.CompletableFuture;
+
+/**
+ * Holds cached permission and meta lookup data for a {@link PermissionHolder}.
+ *
+ * <p>All calls will account for inheritance, as well as any default data
+ * provided by the platform. These calls are heavily cached and are therefore
+ * fast.</p>
+ */
+public interface CachedDataManager {
+
+    /**
+     * Gets the manager for {@link CachedPermissionData}.
+     *
+     * @return the permission data manager
+     */
+    @NonNull Container<CachedPermissionData> permissionData();
+
+    /**
+     * Gets the manager for {@link CachedMetaData}.
+     *
+     * @return the meta data manager
+     */
+    @NonNull Container<CachedMetaData> metaData();
+
+    /**
+     * Gets PermissionData from the cache, using the given query options.
+     *
+     * @param queryOptions the query options
+     * @return a permission data instance
+     */
+    @NonNull CachedPermissionData getPermissionData(@NonNull QueryOptions queryOptions);
+
+    /**
+     * Gets MetaData from the cache, using the given query options.
+     *
+     * @param queryOptions the query options
+     * @return a meta data instance
+     */
+    @NonNull CachedMetaData getMetaData(@NonNull QueryOptions queryOptions);
+
+    /**
+     * Gets PermissionData from the cache, using the most appropriate query options
+     * available at the time.
+     *
+     * <p>For {@link User}s, the most appropriate query options will be their
+     * {@link ContextManager#getQueryOptions(User) current active query options} if the
+     * corresponding player is online, and otherwise, will fallback to
+     * {@link ContextManager#getStaticQueryOptions() the current static query options}.</p>
+     *
+     * <p>For {@link Group}s, the most appropriate query options will always be
+     * {@link ContextManager#getStaticQueryOptions() the current static query options}.</p>
+     *
+     * @return a permission data instance
+     * @since 5.1
+     */
+    @NonNull CachedPermissionData getPermissionData();
+
+    /**
+     * Gets MetaData from the cache, using the most appropriate query options
+     * available at the time.
+     *
+     * <p>For {@link User}s, the most appropriate query options will be their
+     * {@link ContextManager#getQueryOptions(User) current active query options} if the
+     * corresponding player is online, and otherwise, will fallback to
+     * {@link ContextManager#getStaticQueryOptions() the current static query options}.</p>
+     *
+     * <p>For {@link Group}s, the most appropriate query options will always be
+     * {@link ContextManager#getStaticQueryOptions() the current static query options}.</p>
+     *
+     * @return a meta data instance
+     * @since 5.1
+     * @see PermissionHolder#getQueryOptions()
+     */
+    @NonNull CachedMetaData getMetaData();
+
+    /**
+     * Invalidates all cached {@link CachedPermissionData} and {@link CachedMetaData}
+     * instances.
+     */
+    void invalidate();
+
+    /**
+     * Invalidates all underlying permission calculators.
+     *
+     * <p>Can be called to allow for an update in defaults.</p>
+     */
+    void invalidatePermissionCalculators();
+
+    /**
+     * Manages a specific type of {@link CachedData cached data} within
+     * a {@link CachedDataManager} instance.
+     *
+     * @param <T> the data type
+     */
+    interface Container<T extends CachedData> {
+
+        /**
+         * Gets {@link T data} from the cache.
+         *
+         * @param queryOptions the query options
+         * @return a data instance
+         * @throws NullPointerException if contexts is null
+         */
+        @NonNull T get(@NonNull QueryOptions queryOptions);
+
+        /**
+         * Calculates {@link T data}, bypassing the cache.
+         *
+         * <p>The result of this operation is calculated each time the method is called.
+         * The result is not added to the internal cache.</p>
+         *
+         * <p>It is therefore highly recommended to use {@link #get(QueryOptions)} instead.</p>
+         *
+         * <p>The use cases of this method are more around constructing one-time
+         * instances of {@link T data}, without adding the result to the cache.</p>
+         *
+         * @param queryOptions the query options
+         * @return a data instance
+         * @throws NullPointerException if contexts is null
+         */
+        @NonNull T calculate(@NonNull QueryOptions queryOptions);
+
+        /**
+         * (Re)calculates data for a given context.
+         *
+         * <p>This method returns immediately in all cases. The (re)calculation is
+         * performed asynchronously and applied to the cache in the background.</p>
+         *
+         * <p>If there was a previous data instance associated with
+         * the given {@link QueryOptions}, then that instance will continue to be returned by
+         * {@link #get(QueryOptions)} until the recalculation is completed.</p>
+         *
+         * <p>If there was no value calculated and cached prior to the call of this
+         * method, then one will be calculated.</p>
+         *
+         * @param queryOptions the query options
+         * @throws NullPointerException if contexts is null
+         */
+        void recalculate(@NonNull QueryOptions queryOptions);
+
+        /**
+         * (Re)loads permission data for a given context.
+         *
+         * <p>Unlike {@link #recalculate(QueryOptions)}, this method immediately
+         * invalidates any previous data values contained within the cache,
+         * and then schedules a task to reload a new data instance to
+         * replace the one which was invalidated.</p>
+         *
+         * <p>The invalidation happens immediately during the execution of this method.
+         * The result of the re-computation encapsulated by the future.</p>
+         *
+         * <p>Subsequent calls to {@link #get(QueryOptions)} will block until
+         * the result of this operation is complete.</p>
+         *
+         * <p>If there was no value calculated and cached prior to the call of this
+         * method, then one will be calculated.</p>
+         *
+         * <p>This method returns a Future so users can optionally choose to wait
+         * until the recalculation has been performed.</p>
+         *
+         * @param queryOptions the query options.
+         * @return a future
+         * @throws NullPointerException if contexts is null
+         */
+        @NonNull CompletableFuture<? extends T> reload(@NonNull QueryOptions queryOptions);
+
+        /**
+         * Recalculates data for all known contexts.
+         *
+         * <p>This method returns immediately. The recalculation is performed
+         * asynchronously and applied to the cache in the background.</p>
+         *
+         * <p>The previous data instances will continue to be returned
+         * by {@link #get(QueryOptions)} until the recalculation is completed.</p>
+         */
+        void recalculate();
+
+        /**
+         * Reloads permission data for all known contexts.
+         *
+         * <p>Unlike {@link #recalculate()}, this method immediately
+         * invalidates all previous data values contained within the cache,
+         * and then schedules a task to reload new data instances to
+         * replace the ones which were invalidated.</p>
+         *
+         * <p>The invalidation happens immediately during the execution of this method.
+         * The result of the re-computation encapsulated by the future.</p>
+         *
+         * <p>Subsequent calls to {@link #get(QueryOptions)} will block until
+         * the result of this operation is complete.</p>
+         *
+         * <p>This method returns a Future so users can optionally choose to wait
+         * until the recalculation has been performed.</p>
+         *
+         * @return a future
+         */
+        @NonNull CompletableFuture<Void> reload();
+
+        /**
+         * Invalidates any cached data instances mapped to the given context.
+         *
+         * @param queryOptions the queryOptions to invalidate for
+         */
+        void invalidate(@NonNull QueryOptions queryOptions);
+
+        /**
+         * Invalidates all cached data instances.
+         */
+        void invalidate();
+    }
+
+}
@@ -0,0 +1,255 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.cacheddata;
+
+import net.luckperms.api.metastacking.MetaStackDefinition;
+import net.luckperms.api.node.types.MetaNode;
+import net.luckperms.api.node.types.PrefixNode;
+import net.luckperms.api.node.types.SuffixNode;
+import net.luckperms.api.node.types.WeightNode;
+import org.checkerframework.checker.nullness.qual.NonNull;
+import org.checkerframework.checker.nullness.qual.Nullable;
+import org.jetbrains.annotations.Unmodifiable;
+
+import java.util.List;
+import java.util.Map;
+import java.util.Optional;
+import java.util.SortedMap;
+import java.util.function.Function;
+
+/**
+ * Holds cached meta lookup data for a specific set of contexts.
+ * 
+ * <p>Meta data refers to {@link PrefixNode prefixes}, {@link SuffixNode suffixes} and
+ * {@link MetaNode meta (options)} held by a permission holder.</p>
+ *
+ * <p>All calls will account for inheritance, as well as any default data
+ * provided by the platform. These calls are heavily cached and are therefore
+ * fast.</p>
+ */
+public interface CachedMetaData extends CachedData {
+
+    /**
+     * Query a meta value for the given {@code key}.
+     * 
+     * <p>This method will always return a {@link Result}, but the
+     * {@link Result#result() inner result} {@link String} will be null if a value
+     * for the given key was not found.</p>
+     *
+     * @param key the key
+     * @return a result containing the value
+     * @since 5.4
+     */
+    @NonNull Result<String, MetaNode> queryMetaValue(@NonNull String key);
+
+    /**
+     * Gets a value for the given meta key.
+     * 
+     * <p>If no such meta value exists for the given key, {@code null} is returned.</p>
+     *
+     * @param key the key
+     * @return the value
+     */
+    default @Nullable String getMetaValue(@NonNull String key) {
+        return queryMetaValue(key).result();
+    }
+
+    /**
+     * Gets a value for the given meta key, and runs it through the given {@code transformer}.
+     *
+     * <p>If no such meta value exists, an {@link Optional#empty() empty optional} is returned.
+     * (the transformer will never be passed a null argument)</p>
+     *
+     * <p>The transformer is allowed to throw {@link IllegalArgumentException} or return null. This
+     * will also result in an {@link Optional#empty() empty optional} being returned.</p>
+     *
+     * <p>For example, to parse and return an integer meta value, use:</p>
+     * <p><blockquote><pre>
+     *     getMetaValue("my-int-val", Integer::parseInt).orElse(0);
+     * </pre></blockquote>
+     *
+     * @param key the key
+     * @param valueTransformer the transformer used to transform the value
+     * @param <T> the type of the transformed result
+     * @return the meta value
+     * @since 5.3
+     */
+    default <T> @NonNull Optional<T> getMetaValue(@NonNull String key, @NonNull Function<String, ? extends T> valueTransformer) {
+        return Optional.ofNullable(getMetaValue(key)).map(value -> {
+            try {
+                return valueTransformer.apply(value);
+            } catch (IllegalArgumentException e) {
+                return null;
+            }
+        });
+    }
+
+    /**
+     * Query for a prefix.
+     * 
+     * <p>This method uses the rules defined by the {@link #getPrefixStackDefinition() prefix stack}
+     * to produce a {@link String} output.</p>
+     * 
+     * <p>Assuming the default configuration is used, this will usually be the value of the
+     * holder's highest priority prefix node.</p>
+     * 
+     * <p>This method will always return a {@link Result}, but the
+     * {@link Result#result() inner result} {@link String} will be null if
+     * a the resultant prefix stack contained no elements.</p>
+     *
+     * @return a result containing the prefix
+     * @since 5.4
+     */
+    @NonNull Result<String, PrefixNode> queryPrefix();
+
+    /**
+     * Gets the prefix.
+     * 
+     * <p>This method uses the rules defined by the {@link #getPrefixStackDefinition() prefix stack}
+     * to produce a {@link String} output.</p>
+     * 
+     * <p>Assuming the default configuration is used, this will usually be the value of the
+     * holder's highest priority prefix node.</p>
+     * 
+     * <p>If the resultant prefix stack contained no elements, {@code null} is returned.</p>
+     *
+     * @return a prefix string, or null
+     */
+    default @Nullable String getPrefix() {
+        return queryPrefix().result();
+    }
+
+    /**
+     * Query for a suffix.
+     *
+     * <p>This method uses the rules defined by the {@link #getSuffixStackDefinition() suffix stack}
+     * to produce a {@link String} output.</p>
+     *
+     * <p>Assuming the default configuration is used, this will usually be the value of the
+     * holder's highest priority suffix node.</p>
+     *
+     * <p>This method will always return a {@link Result}, but the
+     * {@link Result#result() inner result} {@link String} will be null if
+     * a the resultant suffix stack contained no elements.</p>
+     *
+     * @return a result containing the suffix
+     * @since 5.4
+     */
+    @NonNull Result<String, SuffixNode> querySuffix();
+
+    /**
+     * Gets the suffix.
+     *
+     * <p>This method uses the rules defined by the {@link #getSuffixStackDefinition() suffix stack}
+     * to produce a {@link String} output.</p>
+     *
+     * <p>Assuming the default configuration is used, this will usually be the value of the
+     * holder's highest priority suffix node.</p>
+     *
+     * <p>If the resultant suffix stack contained no elements, {@code null} is returned.</p>
+     *
+     * @return a suffix string, or null
+     */
+    default @Nullable String getSuffix() {
+        return querySuffix().result();
+    }
+
+    /**
+     * Query for a weight.
+     *
+     * <p>This method will always return a {@link Result}, and the
+     * {@link Result#result() inner result} {@link Integer} will never be null.
+     * A value of {@code 0} is equivalent to null.</p>
+     *
+     * @return a result containing the weight
+     * @since 5.5
+     */
+    @NonNull Result<Integer, WeightNode> queryWeight();
+
+    /**
+     * Gets the weight.
+     *
+     * <p>If the there is no defined weight, {@code 0} is returned.</p>
+     *
+     * @return the weight
+     * @since 5.5
+     */
+    default int getWeight() {
+        return queryWeight().result();
+    }
+
+    /**
+     * Gets a map of all accumulated {@link MetaNode meta}.
+     *
+     * <p>Prefer using the {@link #getMetaValue(String)} method for querying values.</p>
+     *
+     * @return a map of meta
+     */
+    @NonNull @Unmodifiable Map<String, List<String>> getMeta();
+
+    /**
+     * Gets a sorted map of all accumulated {@link PrefixNode prefixes}.
+     *
+     * <p>Prefer using the {@link #getPrefix()} method for querying.</p>
+     *
+     * @return a sorted map of prefixes
+     */
+    @NonNull @Unmodifiable SortedMap<Integer, String> getPrefixes();
+
+    /**
+     * Gets a sorted map of all accumulated {@link SuffixNode suffixes}.
+     *
+     * <p>Prefer using the {@link #getSuffix()} method for querying.</p>
+     *
+     * @return a sorted map of suffixes
+     */
+    @NonNull @Unmodifiable SortedMap<Integer, String> getSuffixes();
+
+    /**
+     * Gets the name of the holders primary group.
+     *
+     * <p>Will return {@code null} for Group holder types.</p>
+     *
+     * @return the name of the primary group
+     * @since 5.1
+     */
+    @Nullable String getPrimaryGroup();
+
+    /**
+     * Gets the definition used for the prefix stack.
+     *
+     * @return the definition used for the prefix stack
+     */
+    @NonNull MetaStackDefinition getPrefixStackDefinition();
+
+    /**
+     * Gets the definition used for the suffix stack.
+     *
+     * @return the definition used for the suffix stack
+     */
+    @NonNull MetaStackDefinition getSuffixStackDefinition();
+
+}
@@ -0,0 +1,85 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.cacheddata;
+
+import net.luckperms.api.node.Node;
+import net.luckperms.api.util.Tristate;
+import org.checkerframework.checker.nullness.qual.NonNull;
+import org.jetbrains.annotations.Unmodifiable;
+
+import java.util.Map;
+
+/**
+ * Holds cached permission lookup data for a specific set of contexts.
+ *
+ * <p>All calls will account for inheritance, as well as any default data
+ * provided by the platform. These calls are heavily cached and are therefore
+ * fast.</p>
+ */
+public interface CachedPermissionData extends CachedData {
+
+    /**
+     * Performs a permission check for the given {@code permission} node.
+     *
+     * <p>This check is equivalent to the "hasPermission" method call on most platforms.
+     * You can use {@link Tristate#asBoolean()} if you need a truthy result.</p>
+     *
+     * @param permission the permission node
+     * @return a result containing the tristate
+     * @throws NullPointerException if permission is null
+     * @since 5.4
+     */
+    @NonNull Result<Tristate, Node> queryPermission(@NonNull String permission);
+
+    /**
+     * Performs a permission check for the given {@code permission} node.
+     *
+     * <p>This check is equivalent to the "hasPermission" method call on most platforms.
+     * You can use {@link Tristate#asBoolean()} if you need a truthy result.</p>
+     *
+     * @param permission the permission node
+     * @return a tristate result
+     * @throws NullPointerException if permission is null
+     */
+    default @NonNull Tristate checkPermission(@NonNull String permission) {
+        return queryPermission(permission).result();
+    }
+
+    /**
+     * Invalidates the underlying permission calculator cache.
+     *
+     * <p>Can be called to allow for an update in defaults.</p>
+     */
+    void invalidateCache();
+
+    /**
+     * Gets an immutable copy of the permission map backing the permission calculator
+     *
+     * @return an immutable set of permissions
+     */
+    @NonNull @Unmodifiable Map<String, Boolean> getPermissionMap();
+
+}
@@ -0,0 +1,81 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.cacheddata;
+
+import net.luckperms.api.node.Node;
+import org.checkerframework.checker.nullness.qual.Nullable;
+
+/**
+ * Represents the result of a cached data lookup.
+ *
+ * <p>You can find "the holder that has the node that caused this result"
+ * using the following code:</p>
+ * <p></p>
+ * <blockquote>
+ * <pre>
+ * public static {@link net.luckperms.api.model.PermissionHolder.Identifier} holderThatHasTheNodeThatCausedTheResult(Result&lt;?, ?&gt; result) {
+ *     {@link Node} node = result.node();
+ *     if (node == null) {
+ *         return null;
+ *     }
+ *     {@link net.luckperms.api.node.metadata.types.InheritanceOriginMetadata} origin = node.getMetadata(InheritanceOriginMetadata.KEY).orElse(null);
+ *     if (origin == null) {
+ *         return null;
+ *     }
+ *     return origin.getOrigin();
+ * }
+ * </pre>
+ *
+ * <p>Combined with the node itself, this is all the information needed to determine
+ * the root cause of the result.</p>
+ * </blockquote>
+ *
+ * <p>The nullability of {@link #result()} is purposely undefined to allow the
+ * flexibility for methods using {@link Result} to declare it. In general, if the {@code T} type
+ * has a nullable/undefined value, then the return of {@link #result()} will be non-null,
+ * and if not, it will be nullable.</p>
+ *
+ * @param <T> the result type
+ * @param <N> the node type
+ * @since 5.4
+ */
+public interface Result<T, N extends Node> {
+
+    /**
+     * Gets the underlying result.
+     *
+     * @return the underlying result
+     */
+    T result();
+
+    /**
+     * Gets the node that caused the result.
+     *
+     * @return the causing node
+     */
+    @Nullable N node();
+
+}
@@ -0,0 +1,30 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+/**
+ * Caches permission checks and meta lookups for {@link net.luckperms.api.model.user.User}s and
+ * {@link net.luckperms.api.model.group.Group}s.
+ */
+package net.luckperms.api.cacheddata;
@@ -0,0 +1,101 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.context;
+
+import org.checkerframework.checker.nullness.qual.NonNull;
+import org.checkerframework.checker.nullness.qual.Nullable;
+
+/**
+ * Represents an individual context pair.
+ *
+ * <p>Context keys and values may not be null or empty. A key/value will be
+ * deemed empty if it's length is zero, or if it consists of only space
+ * characters.</p>
+ *
+ * @see ContextSet
+ */
+public interface Context {
+
+    /**
+     * Tests whether {@code key} is valid.
+     *
+     * <p>Context keys and values may not be null or empty. A key/value will be
+     * deemed empty if it's length is zero, or if it consists of only space
+     * characters.</p>
+     *
+     * <p>An exception is thrown when an invalid key is added to a {@link ContextSet}.</p>
+     *
+     * @param key the key to test
+     * @return true if valid, false otherwise.
+     * @since 5.1
+     */
+    static boolean isValidKey(@Nullable String key) {
+        if (key == null || key.isEmpty()) {
+            return false;
+        }
+
+        // look for a non-whitespace character
+        for (int i = 0, n = key.length(); i < n; i++) {
+            if (key.charAt(i) != ' ') {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    /**
+     * Tests whether {@code value} is valid.
+     *
+     * <p>Context keys and values may not be null or empty. A key/value will be
+     * deemed empty if it's length is zero, or if it consists of only space
+     * characters.</p>
+     *
+     * <p>An exception is thrown when an invalid value is added to a {@link ContextSet}.</p>
+     *
+     * @param value the value to test
+     * @return true if valid, false otherwise.
+     * @since 5.1
+     */
+    static boolean isValidValue(@Nullable String value) {
+        return isValidKey(value); // the same for now...
+    }
+
+    /**
+     * Gets the context key.
+     *
+     * @return the key
+     */
+    @NonNull String getKey();
+
+    /**
+     * Gets the context value
+     *
+     * @return the value
+     */
+    @NonNull String getValue();
+
+}
@@ -0,0 +1,110 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.context;
+
+import org.checkerframework.checker.nullness.qual.NonNull;
+
+import java.util.Objects;
+import java.util.function.Function;
+
+/**
+ * Calculates the contexts applicable for a contextual subject.
+ *
+ * <p>Implementations of this interface should satisfy the following
+ * requirements:</p>
+ * <ul>
+ *     <li>Context lookups should be <i>fast</i>: lookup methods are likely to
+ *     be invoked frequently, and should therefore be fast to execute. If
+ *     determining the current contexts involves a particularly time consuming
+ *     lookup (database queries, network requests, etc), then such results
+ *     should be cached ahead of time.</li>
+ *
+ *     <li>Context lookups should be <i>thread-safe</i>: lookups will sometimes
+ *     be performed from "async" threads, and therefore should not access any
+ *     part of the server only safe for access from a sync context. If
+ *     necessary, such results should be determined ahead of time and stored in
+ *     a thread-safe collection for retrieval later.</li>
+ *
+ *     <li>Context lookups should <i>not query active contexts</i>: doing so is
+ *     likely to result in a stack overflow, or thread deadlock. Care should be
+ *     taken to avoid (indirect) calls to the same calculator.</li>
+ * </ul>
+ * <p></p>
+ *
+ * <p>Calculators should be registered using
+ * {@link ContextManager#registerCalculator(ContextCalculator)}.</p>
+ */
+@FunctionalInterface
+public interface ContextCalculator<T> {
+
+    /**
+     * Creates a new {@link ContextCalculator} that provides a single context.
+     *
+     * @param key the key of the context provided by the calculator
+     * @param valueFunction the function used to compute the corresponding value
+     *                      for each query. A context will not be "accumulated"
+     *                      if the value returned is null.
+     * @param <T> the contextual type
+     * @return the resultant calculator
+     */
+    static <T> @NonNull ContextCalculator<T> forSingleContext(@NonNull String key, @NonNull Function<T, String> valueFunction) {
+        Objects.requireNonNull(key, "key");
+        Objects.requireNonNull(valueFunction, "valueFunction");
+        return (target, consumer) -> {
+            String value = valueFunction.apply(target);
+            if (value != null) {
+                consumer.accept(key, value);
+            }
+        };
+    }
+
+    /**
+     * Submits any contexts this calculator determines to be applicable to
+     * the {@code target} contextual subject.
+     *
+     * <p>Care should be taken to ensure implementations of this method meet the
+     * general requirements for {@link ContextCalculator}, defined in the class
+     * doc.</p>
+     *
+     * @param target the target contextual subject for this operation
+     * @param consumer the {@link ContextConsumer} to submit contexts to
+     */
+    void calculate(@NonNull T target, @NonNull ContextConsumer consumer);
+
+    /**
+     * Gets a {@link ContextSet}, containing some/all of the contexts this
+     * calculator could potentially submit.
+     *
+     * <p>The result of this call is primarily intended on providing
+     * suggestions to end users when defining permissions.</p>
+     *
+     * @return a set of potential contexts
+     */
+    default @NonNull ContextSet estimatePotentialContexts() {
+        return ImmutableContextSet.empty();
+    }
+
+}
@@ -0,0 +1,64 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.context;
+
+import org.checkerframework.checker.nullness.qual.NonNull;
+
+/**
+ * Functional interface that accepts context key value pairs.
+ */
+@FunctionalInterface
+public interface ContextConsumer {
+
+    /**
+     * Accepts a context pair.
+     *
+     * @param key the key
+     * @param value the value
+     */
+    void accept(@NonNull String key, @NonNull String value);
+
+    /**
+     * Accepts a context pair.
+     *
+     * @param context the context
+     */
+    default void accept(@NonNull Context context) {
+        accept(context.getKey(), context.getValue());
+    }
+
+    /**
+     * Accepts a context set.
+     *
+     * @param contextSet the context set
+     */
+    default void accept(@NonNull ContextSet contextSet) {
+        for (Context entry : contextSet) {
+            accept(entry);
+        }
+    }
+
+}
@@ -0,0 +1,174 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.context;
+
+import net.luckperms.api.model.user.User;
+import net.luckperms.api.query.QueryMode;
+import net.luckperms.api.query.QueryOptions;
+import org.checkerframework.checker.nullness.qual.NonNull;
+import org.jetbrains.annotations.ApiStatus.Internal;
+
+import java.util.Optional;
+
+/**
+ * Manages {@link ContextCalculator}s, and calculates applicable contexts for a
+ * given type.
+ *
+ * <p>This interface accepts {@link Object} types as a parameter to avoid having to depend
+ * on specific server implementations. In all cases, the "player" or "subject" type for
+ * the platform must be used.</p>
+ *
+ * <p>Specifically:</p>
+ *
+ * <p></p>
+ * <ul>
+ * <li>{@code org.bukkit.entity.Player}</li>
+ * <li>{@code net.md_5.bungee.api.connection.ProxiedPlayer}</li>
+ * <li>{@code org.spongepowered.api.service.permission.Subject}</li>
+ * <li>{@code net.minecraft.server.network.ServerPlayerEntity} (Fabric)</li>
+ * <li>{@code cn.nukkit.Player}</li>
+ * <li>{@code com.velocitypowered.api.proxy.Player}</li>
+ * </ul>
+ */
+public interface ContextManager {
+
+    /**
+     * Queries the ContextManager for current context values for the subject.
+     *
+     * @param subject the subject
+     * @return the applicable context for the subject
+     */
+    @NonNull ImmutableContextSet getContext(@NonNull Object subject);
+
+    /**
+     * Queries the ContextManager for current context values for the given User.
+     *
+     * <p>This will only return a value if the player corresponding to the
+     * {@link User} is online.</p>
+     *
+     * <p>If you need to obtain a {@link ImmutableContextSet} instance
+     * regardless, you should initially try this method, and then fallback on
+     * {@link #getStaticContext()}.</p>
+     *
+     * @param user the user
+     * @return the applicable context for the subject
+     */
+    @NonNull Optional<ImmutableContextSet> getContext(@NonNull User user);
+
+    /**
+     * Gets the contexts from the static calculators in this manager.
+     *
+     * <p>Static calculators provide the same context for all subjects, and are
+     * marked as such when registered.</p>
+     *
+     * @return the current active static contexts
+     */
+    @NonNull ImmutableContextSet getStaticContext();
+
+    /**
+     * Creates a new {@link QueryOptions.Builder}.
+     *
+     * @param mode the mode
+     * @return a new query options builder
+     */
+    QueryOptions.@NonNull Builder queryOptionsBuilder(@NonNull QueryMode mode);
+
+    /**
+     * Obtains current {@link QueryOptions} for the subject.
+     *
+     * @param subject the subject
+     * @return the query options for the subject
+     */
+    @NonNull QueryOptions getQueryOptions(@NonNull Object subject);
+
+    /**
+     * Obtains current {@link QueryOptions} for the given User.
+     *
+     * <p>This will only return a value if the player corresponding to the
+     * {@link User} is online.</p>
+     *
+     * <p>If you need to obtain a {@link QueryOptions} instance regardless, you should
+     * initially try this method, and then fallback on {@link #getStaticQueryOptions()}.</p>
+     *
+     * @param user the user
+     * @return the query options for the subject
+     */
+    @NonNull Optional<QueryOptions> getQueryOptions(@NonNull User user);
+
+    /**
+     * Gets the static query options, using the registered static context calculators.
+     *
+     * @return the current static query options
+     */
+    @NonNull QueryOptions getStaticQueryOptions();
+
+    /**
+     * Registers a context calculator with the manager.
+     *
+     * @param calculator the calculator
+     */
+    void registerCalculator(@NonNull ContextCalculator<?> calculator);
+
+    /**
+     * Unregisters a context calculator with the manager.
+     *
+     * @param calculator the calculator
+     */
+    void unregisterCalculator(@NonNull ContextCalculator<?> calculator);
+
+    /**
+     * Signal to the {@link ContextManager} that a {@code subject}s
+     * current contexts have changed.
+     *
+     * <p>It is not strictly necessary to make a call to this method every time a context
+     * changes.</p>
+     *
+     * @param subject the subject
+     * @since 5.2
+     */
+    void signalContextUpdate(@NonNull Object subject);
+
+    /**
+     * Gets the {@link ContextSetFactory}, responsible for creating
+     * {@link ContextSet} instances.
+     *
+     * @return the context set factory
+     */
+    @Internal
+    @NonNull ContextSetFactory getContextSetFactory();
+
+    /**
+     * Invalidates the lookup cache for a given subject
+     *
+     * @param subject the subject
+     * @deprecated Use {@link #signalContextUpdate(Object)} instead
+     */
+    @Deprecated
+    default void invalidateCache(@NonNull Object subject) {
+        signalContextUpdate(subject);
+    }
+
+}
@@ -0,0 +1,63 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.context;
+
+import net.luckperms.api.query.OptionKey;
+
+/**
+ * Mode for determining whether a {@link ContextSet} satisfies another.
+ *
+ * @since 5.2
+ * @see ContextSet#isSatisfiedBy(ContextSet, ContextSatisfyMode)
+ */
+public enum ContextSatisfyMode {
+
+    /**
+     * Mode where a {@link ContextSet} A will be satisfied by another set B, if at least one of the
+     * key-value entries per key in A are also in B.
+     *
+     * <p>For example, given <code>A = {server=survival, world=overworld, world=nether}</code>,
+     * another set {@code X} will satisfy {@code A} if {@code X} contains
+     * <code>server=survival AND (world=overworld OR world=nether)</code>.</p>
+     */
+    AT_LEAST_ONE_VALUE_PER_KEY,
+
+    /**
+     * Mode where a {@link ContextSet} A will be satisfied by another set B, if all key-value
+     * entries in A are also in B.
+     *
+     * <p>For example, given <code>A = {server=survival, world=overworld, world=nether}</code>,
+     * another set {@code X} will satisfy {@code A} if {@code X} contains
+     * <code>server=survival AND world=overworld AND world=nether</code>.</p>
+     */
+    ALL_VALUES_PER_KEY;
+
+    /**
+     * The {@link OptionKey} for {@link ContextSatisfyMode}.
+     */
+    public static final OptionKey<ContextSatisfyMode> KEY = OptionKey.of("contextsatisfymode", ContextSatisfyMode.class);
+
+}
@@ -0,0 +1,271 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.context;
+
+import org.checkerframework.checker.nullness.qual.NonNull;
+import org.jetbrains.annotations.Unmodifiable;
+
+import java.util.Iterator;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.Set;
+
+/**
+ * A set of contexts.
+ *
+ * <p>Context in the most basic sense simply means the circumstances where
+ * something will apply.</p>
+ *
+ * <p>A single "context" consists of a key and a value, both strings. The key
+ * describes the type of the context, and the value represents what the key is
+ * set to.</p>
+ *
+ * <p>For example, a context with {@code key=world} and {@code value=world_nether}
+ * describes that a subject is in the "world_nether" world.</p>
+ *
+ * <p>Contexts are exposed to end users and manipulated when managing permissions.
+ * For this reason, context keys should strike a balance between being descriptive
+ * and succinct.</p>
+ *
+ * <p>Context keys and values are case-insensitive, and will be automatically
+ * converted to {@link String#toLowerCase() lowercase} when added to a
+ * context set. Keys and values cannot be null or empty (len=0 or consisting of
+ * only whitespace).</p>
+ *
+ * <p>If a context key is formed of more than one word, the parts should be
+ * separated by the '{@code -}' character. (e.g. "{@code server-type}")</p>
+ *
+ * <p>If a context key is likely to conflict with another plugin, it should be
+ * appropriately namespaced using the name of the plugin providing the context.
+ * The namespace should be at the start of the context key, and separated using
+ * the '{@code :}' character. (e.g. "{@code worldguard:region}" for WorldGuard
+ * regions)</p>
+ *
+ * <p>Contexts can be combined with each other to form so called
+ * "context sets" - simply a collection of context pairs.</p>
+ *
+ * <p>Two default ContextSet implementations are provided.
+ * {@link MutableContextSet} allows the addition and removal of context keys
+ * after construction, and {@link ImmutableContextSet} does not.</p>
+ */
+public interface ContextSet extends Iterable<Context> {
+
+    /**
+     * Gets if this {@link ContextSet} is immutable.
+     *
+     * <p>The state of immutable instances will never change.</p>
+     *
+     * @return true if the set is immutable
+     */
+    boolean isImmutable();
+
+    /**
+     * Returns an immutable representation of this {@link ContextSet}.
+     *
+     * <p>If the set is already immutable, the same object will be returned.
+     * If the set is mutable, an immutable copy will be made.</p>
+     *
+     * @return an immutable representation of this set
+     */
+    @NonNull ImmutableContextSet immutableCopy();
+
+    /**
+     * Creates a mutable copy of this {@link ContextSet}.
+     *
+     * <p>A new copy is returned regardless of the
+     * {@link #isImmutable() mutability} of this set.</p>
+     *
+     * @return a mutable ContextSet
+     */
+    @NonNull MutableContextSet mutableCopy();
+
+    /**
+     * Returns a {@link Set} of {@link Context}s representing the current
+     * state of this {@link ContextSet}.
+     *
+     * <p>The returned set is immutable, and is a copy of the current set.
+     * (will not update live)</p>
+     *
+     * @return an immutable set
+     */
+    @NonNull @Unmodifiable Set<Context> toSet();
+
+    /**
+     * Returns a {@link Map} representing the current state of this
+     * {@link ContextSet}.
+     *
+     * <p>The returned set is immutable, and is a copy of the current set.
+     * (will not update live)</p>
+     *
+     * @return a map
+     */
+    @NonNull @Unmodifiable Map<String, Set<String>> toMap();
+
+    /**
+     * Returns a {@link Map} <b>loosely</b> representing the current state of
+     * this {@link ContextSet}.
+     *
+     * <p>The returned map is immutable, and is a copy of the current set.
+     * (will not update live)</p>
+     *
+     * <p>As a single context key can be mapped to multiple values, this method
+     * may not be a true representation of the set.</p>
+     *
+     * @return an immutable map
+     * @deprecated Deprecated because the returned map may not contain all data in the ContextSet
+     */
+    @Deprecated
+    @NonNull @Unmodifiable Map<String, String> toFlattenedMap();
+
+    /**
+     * Returns an {@link Iterator} over each of the context pairs in this set.
+     *
+     * <p>The returned iterator represents the state of the set at the time of creation. It is not
+     * updated as the set changes.</p>
+     *
+     * <p>The iterator does not support {@link Iterator#remove()} calls.</p>
+     *
+     * @return an iterator
+     */
+    @Override
+    @NonNull @Unmodifiable Iterator<Context> iterator();
+
+    /**
+     * Returns if the {@link ContextSet} contains at least one value for the
+     * given key.
+     *
+     * @param key the key to check for
+     * @return true if the set contains a value for the key
+     * @throws NullPointerException if the key is null
+     */
+    boolean containsKey(@NonNull String key);
+
+    /**
+     * Returns a {@link Set} of the values mapped to the given key.
+     *
+     * <p>The returned set is immutable, and only represents the current state
+     * of the {@link ContextSet}. (will not update live)</p>
+     *
+     * @param key the key to get values for
+     * @return a set of values
+     * @throws NullPointerException if the key is null
+     */
+    @NonNull @Unmodifiable Set<String> getValues(@NonNull String key);
+
+    /**
+     * Returns any value from this {@link ContextSet} matching the key, if present.
+     *
+     * <p>Note that context keys can be mapped to multiple values.
+     * Use {@link #getValues(String)} to retrieve all associated values.</p>
+     *
+     * @param key the key to find values for
+     * @return an optional containing any match
+     */
+    default @NonNull Optional<String> getAnyValue(@NonNull String key) {
+        return getValues(key).stream().findAny();
+    }
+
+    /**
+     * Returns if the {@link ContextSet} contains a given context pairing.
+     *
+     * @param key   the key to look for
+     * @param value the value to look for
+     * @return true if the set contains the context pair
+     * @throws NullPointerException if the key or value is null
+     */
+    boolean contains(@NonNull String key, @NonNull String value);
+
+    /**
+     * Returns if the {@link ContextSet} contains a given context pairing.
+     *
+     * @param entry the entry to look for
+     * @return true if the set contains the context pair
+     * @throws NullPointerException if the key or value is null
+     */
+    default boolean contains(@NonNull Context entry) {
+        Objects.requireNonNull(entry, "entry");
+        return contains(entry.getKey(), entry.getValue());
+    }
+
+    /**
+     * Returns if the {@link ContextSet} contains any of the given context pairings.
+     *
+     * @param key the key to look for
+     * @param values the values to look for
+     * @return true if the set contains any of the pairs
+     * @since 5.2
+     */
+    default boolean containsAny(@NonNull String key, @NonNull Iterable<String> values) {
+        Objects.requireNonNull(key, "key");
+        Objects.requireNonNull(values, "values");
+
+        for (String value : values) {
+            if (contains(key, value)) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    /**
+     * Returns if this {@link ContextSet} is "satisfied" by another set.
+     *
+     * <p>{@link ContextSatisfyMode#AT_LEAST_ONE_VALUE_PER_KEY} is the mode used by this method.</p>
+     *
+     * @param other the other set
+     * @return true if this context set is satisfied by the other
+     */
+    default boolean isSatisfiedBy(@NonNull ContextSet other) {
+        return isSatisfiedBy(other, ContextSatisfyMode.AT_LEAST_ONE_VALUE_PER_KEY);
+    }
+
+    /**
+     * Returns if this {@link ContextSet} is "satisfied" by another set, according to the given
+     * {@code mode}.
+     *
+     * @param other the other set
+     * @param mode the mode to use
+     * @return true if this context set is satisfied by the other
+     * @since 5.2
+     */
+    boolean isSatisfiedBy(@NonNull ContextSet other, @NonNull ContextSatisfyMode mode);
+
+    /**
+     * Returns if the {@link ContextSet} is empty.
+     *
+     * @return true if the set is empty
+     */
+    boolean isEmpty();
+
+    /**
+     * Gets the number of context pairs in the {@link ContextSet}.
+     *
+     * @return the size of the set
+     */
+    int size();
+
+}
@@ -0,0 +1,74 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.context;
+
+import org.checkerframework.checker.nullness.qual.NonNull;
+import org.jetbrains.annotations.ApiStatus.Internal;
+
+/**
+ * A factory for creating {@link ContextSet}s.
+ *
+ * <p>Prefer using the static methods on {@link ImmutableContextSet} or {@link MutableContextSet}
+ * instead of this interface.</p>
+ */
+@Internal
+public interface ContextSetFactory {
+
+    /**
+     * Prefer using {@link ImmutableContextSet#builder()}.
+     *
+     * @return a immutable context set builder
+     * @see ImmutableContextSet#builder()
+     */
+    ImmutableContextSet.@NonNull Builder immutableBuilder();
+
+    /**
+     * Prefer using {@link ImmutableContextSet#of(String, String)}.
+     *
+     * @param key the key
+     * @param value the value
+     * @return an immutable context set
+     * @see ImmutableContextSet#of(String, String)
+     */
+    @NonNull ImmutableContextSet immutableOf(@NonNull String key, @NonNull String value);
+
+    /**
+     * Prefer using {@link ImmutableContextSet#empty()}.
+     *
+     * @return an empty immutable context set
+     * @see ImmutableContextSet#empty()
+     */
+    @NonNull ImmutableContextSet immutableEmpty();
+
+    /**
+     * Prefer using {@link MutableContextSet#create()}.
+     *
+     * @return a new mutable context set
+     * @see MutableContextSet#create()
+     */
+    @NonNull MutableContextSet mutable();
+
+}
@@ -0,0 +1,64 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.context;
+
+/**
+ * Some default context keys used by the plugin.
+ */
+public final class DefaultContextKeys {
+    private DefaultContextKeys() {
+        throw new AssertionError();
+    }
+
+    /**
+     * The context key used to denote the name of the subjects server.
+     */
+    public static final String SERVER_KEY = "server";
+
+    /**
+     * The context key used to denote the name of the subjects world.
+     */
+    public static final String WORLD_KEY = "world";
+
+    /**
+     * The context key used to denote the dimension type of the subjects world.
+     *
+     * <p>Possible values: overworld, the_nether, the_end</p>
+     *
+     * @since 5.3
+     */
+    public static final String DIMENSION_TYPE_KEY = "dimension-type";
+
+    /**
+     * The context key used to denote the subjects gamemode.
+     *
+     * <p>Possible values: survival, creative, adventure, spectator</p>
+     *
+     * @since 5.3
+     */
+    public static final String GAMEMODE_KEY = "gamemode";
+
+}
@@ -0,0 +1,138 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.context;
+
+import net.luckperms.api.LuckPermsProvider;
+import org.checkerframework.checker.nullness.qual.NonNull;
+
+import java.util.Objects;
+
+/**
+ * An immutable implementation of {@link ContextSet}.
+ */
+public interface ImmutableContextSet extends ContextSet {
+
+    /**
+     * Creates an {@link ImmutableContextSet.Builder}.
+     *
+     * @return a new ImmutableContextSet builder
+     */
+    static @NonNull Builder builder() {
+        return LuckPermsProvider.get().getContextManager().getContextSetFactory().immutableBuilder();
+    }
+
+    /**
+     * Returns an empty {@link ImmutableContextSet}.
+     *
+     * @return an empty ImmutableContextSet
+     */
+    static @NonNull ImmutableContextSet empty() {
+        return LuckPermsProvider.get().getContextManager().getContextSetFactory().immutableEmpty();
+    }
+
+    /**
+     * Creates an {@link ImmutableContextSet} from a context pair.
+     *
+     * @param key   the key
+     * @param value the value
+     * @return a new ImmutableContextSet containing one context pair
+     * @throws NullPointerException if key or value is null
+     */
+    static @NonNull ImmutableContextSet of(@NonNull String key, @NonNull String value) {
+        return LuckPermsProvider.get().getContextManager().getContextSetFactory().immutableOf(key, value);
+    }
+
+    /**
+     * @deprecated This context set is already immutable!
+     */
+    @Override
+    @Deprecated
+    @NonNull ImmutableContextSet immutableCopy();
+
+    /**
+     * A builder for {@link ImmutableContextSet}.
+     */
+    interface Builder {
+
+        /**
+         * Adds a context to the set.
+         *
+         * @param key   the key to add
+         * @param value the value to add
+         * @return the builder
+         * @throws NullPointerException if the key or value is null
+         * @see MutableContextSet#add(String, String)
+         */
+        @NonNull Builder add(@NonNull String key, @NonNull String value);
+
+        /**
+         * Adds a context to the set.
+         *
+         * @param entry the entry to add
+         * @return the builder
+         * @throws NullPointerException if the entry is null
+         * @see MutableContextSet#add(Context)
+         */
+        default @NonNull Builder add(@NonNull Context entry) {
+            Objects.requireNonNull(entry, "entry");
+            add(entry.getKey(), entry.getValue());
+            return this;
+        }
+
+        /**
+         * Adds the contexts contained in the given {@link Iterable} to the set.
+         *
+         * @param iterable an iterable of key value context pairs
+         * @return the builder
+         * @throws NullPointerException if iterable is null
+         * @see MutableContextSet#addAll(Iterable)
+         */
+        default @NonNull Builder addAll(@NonNull Iterable<Context> iterable) {
+            for (Context e : Objects.requireNonNull(iterable, "iterable")) {
+                add(e);
+            }
+            return this;
+        }
+
+        /**
+         * Adds all the contexts in another {@link ContextSet} to the set.
+         *
+         * @param contextSet the set to add from
+         * @return the builder
+         * @throws NullPointerException if the contextSet is null
+         * @see MutableContextSet#addAll(ContextSet)
+         */
+        @NonNull Builder addAll(@NonNull ContextSet contextSet);
+
+        /**
+         * Creates a {@link ImmutableContextSet} from the values previously
+         * added to the builder.
+         *
+         * @return an {@link ImmutableContextSet} from the builder
+         */
+        @NonNull ImmutableContextSet build();
+    }
+}
@@ -0,0 +1,125 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.context;
+
+import net.luckperms.api.LuckPermsProvider;
+import org.checkerframework.checker.nullness.qual.NonNull;
+
+import java.util.Objects;
+
+/**
+ * A mutable implementation of {@link ContextSet}.
+ */
+public interface MutableContextSet extends ContextSet {
+
+    /**
+     * Creates a new empty MutableContextSet.
+     *
+     * @return a new MutableContextSet
+     */
+    static @NonNull MutableContextSet create() {
+        return LuckPermsProvider.get().getContextManager().getContextSetFactory().mutable();
+    }
+
+    /**
+     * Creates a {@link MutableContextSet} from a context pair.
+     *
+     * @param key   the key
+     * @param value the value
+     * @return a new MutableContextSet containing one context pair
+     * @throws NullPointerException if key or value is null
+     */
+    static @NonNull MutableContextSet of(@NonNull String key, @NonNull String value) {
+        Objects.requireNonNull(key, "key");
+        Objects.requireNonNull(value, "value");
+        MutableContextSet set = create();
+        set.add(key, value);
+        return set;
+    }
+
+    /**
+     * Adds a context to this set.
+     *
+     * @param key   the key to add
+     * @param value the value to add
+     * @throws NullPointerException if the key or value is null
+     */
+    void add(@NonNull String key, @NonNull String value);
+
+    /**
+     * Adds a context to this set.
+     *
+     * @param entry the entry to add
+     * @throws NullPointerException if the entry is null
+     */
+    default void add(@NonNull Context entry) {
+        Objects.requireNonNull(entry, "entry");
+        add(entry.getKey(), entry.getValue());
+    }
+
+    /**
+     * Adds the contexts contained in the given {@link Iterable} to this set.
+     *
+     * @param iterable an iterable of key value context pairs
+     * @throws NullPointerException if iterable is null
+     */
+    default void addAll(@NonNull Iterable<Context> iterable) {
+        for (Context e : Objects.requireNonNull(iterable, "iterable")) {
+            add(e);
+        }
+    }
+
+    /**
+     * Adds all the contexts in another {@link ContextSet} to this set.
+     *
+     * @param contextSet the set to add from
+     * @throws NullPointerException if the contextSet is null
+     */
+    void addAll(@NonNull ContextSet contextSet);
+
+    /**
+     * Removes a context from this set.
+     *
+     * @param key   the key to remove
+     * @param value the value to remove
+     * @throws NullPointerException if the key or value is null
+     */
+    void remove(@NonNull String key, @NonNull String value);
+
+    /**
+     * Removes all contexts from this set with the given key.
+     *
+     * @param key the key to remove
+     * @throws NullPointerException if the key is null
+     */
+    void removeAll(@NonNull String key);
+
+    /**
+     * Removes all contexts from the set.
+     */
+    void clear();
+
+}
@@ -0,0 +1,75 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.context;
+
+import org.checkerframework.checker.nullness.qual.NonNull;
+
+import java.util.Objects;
+import java.util.function.Supplier;
+
+/**
+ * Extension of {@link ContextCalculator} which provides the same context
+ * regardless of the subject.
+ */
+@FunctionalInterface
+public interface StaticContextCalculator extends ContextCalculator<Object> {
+
+    /**
+     * Creates a new {@link StaticContextCalculator} that provides a single context.
+     *
+     * @param key the key of the context provided by the calculator
+     * @param valueFunction the function used to compute the corresponding value
+     *                      for each query. A context will not be "accumulated"
+     *                      if the value returned is null.
+     * @return the resultant calculator
+     */
+    static StaticContextCalculator forSingleContext(String key, Supplier<String> valueFunction) {
+        Objects.requireNonNull(key, "key");
+        Objects.requireNonNull(valueFunction, "valueFunction");
+        return consumer -> {
+            String value = valueFunction.get();
+            if (value != null) {
+                consumer.accept(key, value);
+            }
+        };
+    }
+
+    /**
+     * Submits any contexts this calculator determines to be applicable.
+     *
+     * <p>Care should be taken to ensure implementations of this method meet the
+     * general requirements for {@link ContextCalculator}, defined in the class
+     * doc.</p>
+     *
+     * @param consumer the {@link ContextConsumer} to submit contexts to
+     */
+    void calculate(@NonNull ContextConsumer consumer);
+
+    @Override
+    default void calculate(@NonNull Object target, @NonNull ContextConsumer consumer) {
+        calculate(consumer);
+    }
+}
@@ -0,0 +1,30 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+/**
+ * Context functionality, including {@link net.luckperms.api.context.ContextSet}s and
+ * {@link net.luckperms.api.context.ContextCalculator}s.
+ */
+package net.luckperms.api.context;
@@ -0,0 +1,84 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.event;
+
+import org.checkerframework.checker.nullness.qual.NonNull;
+import org.jetbrains.annotations.Unmodifiable;
+
+import java.util.Set;
+import java.util.function.Consumer;
+
+/**
+ * The LuckPerms event bus.
+ *
+ * <p>Used to subscribe (or "listen") to LuckPerms events.</p>
+ */
+public interface EventBus {
+
+    /**
+     * Registers a new subscription to the given event.
+     *
+     * <p>The returned {@link EventSubscription} instance encapsulates the subscription state. It has
+     * methods which can be used to terminate the subscription, or view stats about the nature of
+     * the subscription.</p>
+     *
+     * @param eventClass the event class
+     * @param handler    the event handler
+     * @param <T>        the event class
+     * @return an event handler instance representing this subscription
+     */
+    <T extends LuckPermsEvent> @NonNull EventSubscription<T> subscribe(@NonNull Class<T> eventClass, @NonNull Consumer<? super T> handler);
+
+    /**
+     * Registers a new subscription to the given event.
+     *
+     * <p>The returned {@link EventSubscription} instance encapsulates the subscription state. It has
+     * methods which can be used to terminate the subscription, or view stats about the nature of
+     * the subscription.</p>
+     *
+     * <p>Unlike {@link #subscribe(Class, Consumer)}, this method accepts an additional parameter
+     * for {@code plugin}. This object must be a "plugin" instance on the platform, and is used to
+     * automatically {@link EventSubscription#close() unregister} the subscription when the
+     * corresponding plugin is disabled.</p>
+     *
+     * @param <T>        the event class
+     * @param plugin     a plugin instance to bind the subscription to.
+     * @param eventClass the event class
+     * @param handler    the event handler
+     * @return an event handler instance representing this subscription
+     */
+    <T extends LuckPermsEvent> @NonNull EventSubscription<T> subscribe(Object plugin, @NonNull Class<T> eventClass, @NonNull Consumer<? super T> handler);
+
+    /**
+     * Gets a set of all registered handlers for a given event.
+     *
+     * @param eventClass the event to find handlers for
+     * @param <T>        the event class
+     * @return an immutable set of event handlers
+     */
+    <T extends LuckPermsEvent> @NonNull @Unmodifiable Set<EventSubscription<T>> getSubscriptions(@NonNull Class<T> eventClass);
+
+}
@@ -0,0 +1,65 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.event;
+
+import org.checkerframework.checker.nullness.qual.NonNull;
+
+import java.util.function.Consumer;
+
+/**
+ * Represents a subscription to a {@link LuckPermsEvent}.
+ *
+ * @param <T> the event class
+ */
+public interface EventSubscription<T extends LuckPermsEvent> extends AutoCloseable {
+
+    /**
+     * Gets the class this handler is listening to
+     *
+     * @return the event class
+     */
+    @NonNull Class<T> getEventClass();
+
+    /**
+     * Returns true if this handler is active
+     *
+     * @return true if this handler is still active
+     */
+    boolean isActive();
+
+    /**
+     * Unregisters this handler from the event bus.
+     */
+    @Override
+    void close();
+
+    /**
+     * Gets the event consumer responsible for handling the event
+     *
+     * @return the event consumer
+     */
+    @NonNull Consumer<? super T> getHandler();
+}
@@ -0,0 +1,50 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.event;
+
+import net.luckperms.api.LuckPerms;
+import org.checkerframework.checker.nullness.qual.NonNull;
+
+/**
+ * A superinterface for all LuckPerms events.
+ */
+public interface LuckPermsEvent {
+
+    /**
+     * Get the API instance this event was dispatched from
+     *
+     * @return the api instance
+     */
+    @NonNull LuckPerms getLuckPerms();
+
+    /**
+     * Gets the type of the event.
+     *
+     * @return the type of the event
+     */
+    @NonNull Class<? extends LuckPermsEvent> getEventType();
+
+}
@@ -0,0 +1,53 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.event.cause;
+
+/**
+ * The cause of a group/track creation
+ */
+public enum CreationCause {
+
+    /**
+     * The creation was caused by a command
+     */
+    COMMAND,
+
+    /**
+     * The creation was caused by the web editor
+     */
+    WEB_EDITOR,
+
+    /**
+     * The creation was caused by an API call
+     */
+    API,
+
+    /**
+     * The creation was caused by a LuckPerms internal
+     */
+    INTERNAL
+
+}
@@ -0,0 +1,54 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.event.cause;
+
+/**
+ * The cause of a group/track deletion
+ */
+public enum DeletionCause {
+
+    /**
+     * The deletion was caused by a command
+     */
+    COMMAND,
+
+    /**
+     * The deletion was caused by the web editor
+     * @since 5.3
+     */
+    WEB_EDITOR,
+
+    /**
+     * The deletion was caused by an API call
+     */
+    API,
+
+    /**
+     * The deletion was caused by a LuckPerms internal
+     */
+    INTERNAL
+
+}
@@ -0,0 +1,29 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+/**
+ * Event causes.
+ */
+package net.luckperms.api.event.cause;
@@ -0,0 +1,75 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.event.context;
+
+import net.luckperms.api.context.ContextManager;
+import net.luckperms.api.event.LuckPermsEvent;
+import net.luckperms.api.event.util.Param;
+import org.checkerframework.checker.nullness.qual.NonNull;
+
+import java.util.Optional;
+
+/**
+ * Called when a subject's current/active contexts are updated.
+ *
+ * <p>There are no guarantees that this event will be called for every update. It is merely to be
+ * used as a "hint" for plugins which depend on the current active contexts for a player.</p>
+ *
+ * <p>It will always be fired following a call to
+ * {@link ContextManager#signalContextUpdate(Object)}.</p>
+ *
+ * <p>The {@link #getSubject() subject} is always an instance of the platform's subject type. See
+ * {@link ContextManager} for details.</p>
+ *
+ * <p>Unlike most other LuckPerms events, this event is not fired asynchronously. Care should be
+ * taken to ensure listeners are lightweight. Additionally, listeners should ensure they do not
+ * cause further updates to player context, thus possibly causing a stack overflow.</p>
+ *
+ * @since 5.2
+ */
+public interface ContextUpdateEvent extends LuckPermsEvent {
+
+    /**
+     * Gets the subject whose contexts were updated.
+     *
+     * @return the subject
+     */
+    @Param(0)
+    @NonNull Object getSubject();
+
+    /**
+     * Gets the subject whose contexts were updated, casted to a given type.
+     *
+     * @param subjectClass the type to cast to
+     * @param <T> the subject type
+     * @return the casted subject
+     */
+    default <T> @NonNull Optional<T> getSubject(@NonNull Class<T> subjectClass) {
+        Object subject = getSubject();
+        return subjectClass.isInstance(subject) ? Optional.of(subjectClass.cast(subject)) : Optional.empty();
+    }
+
+}
@@ -0,0 +1,29 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+/**
+ * Events relating to {@link net.luckperms.api.context.Context}s.
+ */
+package net.luckperms.api.event.context;
@@ -0,0 +1,46 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.event.extension;
+
+import net.luckperms.api.event.LuckPermsEvent;
+import net.luckperms.api.event.util.Param;
+import net.luckperms.api.extension.Extension;
+import org.checkerframework.checker.nullness.qual.NonNull;
+
+/**
+ * Called when an {@link Extension} is loaded.
+ */
+public interface ExtensionLoadEvent extends LuckPermsEvent {
+
+    /**
+     * Gets the extension that was loaded.
+     *
+     * @return the extension
+     */
+    @Param(0)
+    @NonNull Extension getExtension();
+
+}
@@ -0,0 +1,29 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+/**
+ * Events relating to {@link net.luckperms.api.extension.Extension}s.
+ */
+package net.luckperms.api.event.extension;
@@ -0,0 +1,55 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.event.group;
+
+import net.luckperms.api.cacheddata.CachedDataManager;
+import net.luckperms.api.event.LuckPermsEvent;
+import net.luckperms.api.event.util.Param;
+import net.luckperms.api.model.group.Group;
+import org.checkerframework.checker.nullness.qual.NonNull;
+
+/**
+ * Called when a groups {@link CachedDataManager} is loaded.
+ */
+public interface GroupCacheLoadEvent extends LuckPermsEvent {
+
+    /**
+     * Gets the group whose data was loaded
+     *
+     * @return the group
+     */
+    @Param(0)
+    @NonNull Group getGroup();
+
+    /**
+     * Gets the data that was loaded
+     *
+     * @return the loaded data
+     */
+    @Param(1)
+    @NonNull CachedDataManager getLoadedData();
+
+}
@@ -0,0 +1,55 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.event.group;
+
+import net.luckperms.api.event.LuckPermsEvent;
+import net.luckperms.api.event.cause.CreationCause;
+import net.luckperms.api.event.util.Param;
+import net.luckperms.api.model.group.Group;
+import org.checkerframework.checker.nullness.qual.NonNull;
+
+/**
+ * Called when a group is created
+ */
+public interface GroupCreateEvent extends LuckPermsEvent {
+
+    /**
+     * Gets the new group
+     *
+     * @return the new group
+     */
+    @Param(0)
+    @NonNull Group getGroup();
+
+    /**
+     * Gets the cause of the creation
+     *
+     * @return the cause of the creation
+     */
+    @Param(1)
+    @NonNull CreationCause getCause();
+
+}
@@ -0,0 +1,55 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.event.group;
+
+import net.luckperms.api.cacheddata.CachedDataManager;
+import net.luckperms.api.event.LuckPermsEvent;
+import net.luckperms.api.event.util.Param;
+import net.luckperms.api.model.group.Group;
+import org.checkerframework.checker.nullness.qual.NonNull;
+
+/**
+ * Called when a groups cached data is refreshed
+ */
+public interface GroupDataRecalculateEvent extends LuckPermsEvent {
+
+    /**
+     * Gets the group whose data was recalculated
+     *
+     * @return the group
+     */
+    @Param(0)
+    @NonNull Group getGroup();
+
+    /**
+     * Gets the data that was recalculated
+     *
+     * @return the data
+     */
+    @Param(1)
+    @NonNull CachedDataManager getData();
+
+}
@@ -0,0 +1,65 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.event.group;
+
+import net.luckperms.api.event.LuckPermsEvent;
+import net.luckperms.api.event.cause.DeletionCause;
+import net.luckperms.api.event.util.Param;
+import net.luckperms.api.node.Node;
+import org.checkerframework.checker.nullness.qual.NonNull;
+
+import java.util.Set;
+
+/**
+ * Called when a group is deleted
+ */
+public interface GroupDeleteEvent extends LuckPermsEvent {
+
+    /**
+     * Gets the name of the deleted group
+     *
+     * @return the name of the deleted group
+     */
+    @Param(0)
+    @NonNull String getGroupName();
+
+    /**
+     * Gets an immutable copy of the groups existing data
+     *
+     * @return a copy of the groups existing data
+     */
+    @Param(1)
+    @NonNull Set<Node> getExistingData();
+
+    /**
+     * Gets the cause of the deletion
+     *
+     * @return the cause of the deletion
+     */
+    @Param(2)
+    @NonNull DeletionCause getCause();
+
+}
@@ -0,0 +1,37 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.event.group;
+
+import net.luckperms.api.event.LuckPermsEvent;
+
+/**
+ * Called when all groups have been loaded in from storage.
+ *
+ * <p>Usually only called on startup and in sync tasks.</p>
+ */
+public interface GroupLoadAllEvent extends LuckPermsEvent {
+
+}
@@ -0,0 +1,48 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.event.group;
+
+import net.luckperms.api.event.LuckPermsEvent;
+import net.luckperms.api.event.util.Param;
+import net.luckperms.api.model.group.Group;
+import org.checkerframework.checker.nullness.qual.NonNull;
+
+/**
+ * Called when a group is loaded into memory from the storage.
+ *
+ * Note that this event is not the same as {@link GroupCreateEvent}
+ */
+public interface GroupLoadEvent extends LuckPermsEvent {
+
+    /**
+     * Gets the group that was loaded
+     *
+     * @return the group that was loaded
+     */
+    @Param(0)
+    @NonNull Group getGroup();
+
+}
@@ -0,0 +1,29 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+/**
+ * Events relating to {@link net.luckperms.api.model.group.Group}s.
+ */
+package net.luckperms.api.event.group;
@@ -0,0 +1,76 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.event.log;
+
+import net.luckperms.api.actionlog.Action;
+import net.luckperms.api.event.LuckPermsEvent;
+import net.luckperms.api.event.type.Cancellable;
+import net.luckperms.api.event.util.Param;
+import org.checkerframework.checker.nullness.qual.NonNull;
+
+/**
+ * Called when a log entry is about to be sent to notifiable players on the platform
+ */
+public interface LogBroadcastEvent extends LuckPermsEvent, Cancellable {
+
+    /**
+     * Gets the log entry to be broadcasted
+     *
+     * @return the log entry to be broadcasted
+     */
+    @Param(0)
+    @NonNull Action getEntry();
+
+    /**
+     * Gets where the log entry originated from.
+     *
+     * @return the origin of the log
+     */
+    @Param(1)
+    @NonNull Origin getOrigin();
+
+    /**
+     * Represents where a log entry is from
+     */
+    enum Origin {
+
+        /**
+         * Marks a log entry which originated from the current server instance
+         */
+        LOCAL,
+
+        /**
+         * Marks a log entry which originated from an API call on the current server instance
+         */
+        LOCAL_API,
+
+        /**
+         * Marks a log entry which was sent to this server via the messaging service
+         */
+        REMOTE
+    }
+
+}
@@ -0,0 +1,57 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.event.log;
+
+import net.luckperms.api.actionlog.Action;
+import net.luckperms.api.event.LuckPermsEvent;
+import net.luckperms.api.event.type.Cancellable;
+import net.luckperms.api.event.util.Param;
+import org.checkerframework.checker.nullness.qual.NonNull;
+
+import java.util.UUID;
+
+/**
+ * Called when a log is about to be published to the network via the MessagingService
+ */
+public interface LogNetworkPublishEvent extends LuckPermsEvent, Cancellable {
+
+    /**
+     * Gets the ID of the log entry being published
+     *
+     * @return the id of the log entry being published
+     */
+    @Param(0)
+    @NonNull UUID getLogId();
+
+    /**
+     * Gets the log entry to be published
+     *
+     * @return the log entry to be published
+     */
+    @Param(1)
+    @NonNull Action getEntry();
+
+}
@@ -0,0 +1,90 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.event.log;
+
+import net.luckperms.api.actionlog.Action;
+import net.luckperms.api.event.LuckPermsEvent;
+import net.luckperms.api.event.type.Cancellable;
+import net.luckperms.api.event.util.Param;
+import net.luckperms.api.platform.PlatformEntity;
+import org.checkerframework.checker.nullness.qual.NonNull;
+
+/**
+ * Called when a log entry is about to be sent to specific notifiable object on
+ * the platform.
+ *
+ * <p>This event is not called for players without the notify permission,
+ * but is called for objects which are ignoring log notifications (called with
+ * the cancelled flag set to true).</p>
+ */
+public interface LogNotifyEvent extends LuckPermsEvent, Cancellable {
+
+    /**
+     * Gets the log entry to be sent
+     *
+     * @return the log entry to be sent
+     */
+    @Param(0)
+    @NonNull Action getEntry();
+
+    /**
+     * Gets where the log entry originated from.
+     *
+     * @return the origin of the log
+     */
+    @Param(1)
+    @NonNull Origin getOrigin();
+
+    /**
+     * Gets the object to be notified.
+     *
+     * @return the object to notify
+     */
+    @Param(2)
+    @NonNull PlatformEntity getNotifiable();
+
+    /**
+     * Represents where a log entry is from
+     */
+    enum Origin {
+
+        /**
+         * Marks a log entry which originated from the current server instance
+         */
+        LOCAL,
+
+        /**
+         * Marks a log entry which originated from an API call on the current server instance
+         */
+        LOCAL_API,
+
+        /**
+         * Marks a log entry which was sent to this server via the messaging service
+         */
+        REMOTE
+    }
+
+}
@@ -0,0 +1,47 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.event.log;
+
+import net.luckperms.api.actionlog.Action;
+import net.luckperms.api.event.LuckPermsEvent;
+import net.luckperms.api.event.type.Cancellable;
+import net.luckperms.api.event.util.Param;
+import org.checkerframework.checker.nullness.qual.NonNull;
+
+/**
+ * Called when a log is about to be published to the storage file/table
+ */
+public interface LogPublishEvent extends LuckPermsEvent, Cancellable {
+
+    /**
+     * Gets the log entry to be published
+     *
+     * @return the log entry to be published
+     */
+    @Param(0)
+    @NonNull Action getEntry();
+
+}
@@ -0,0 +1,56 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.event.log;
+
+import net.luckperms.api.actionlog.Action;
+import net.luckperms.api.event.LuckPermsEvent;
+import net.luckperms.api.event.util.Param;
+import org.checkerframework.checker.nullness.qual.NonNull;
+
+import java.util.UUID;
+
+/**
+ * Called when a log entry is received via the MessagingService
+ */
+public interface LogReceiveEvent extends LuckPermsEvent {
+
+    /**
+     * Gets the ID of the log entry being received
+     *
+     * @return the id of the log entry being received
+     */
+    @Param(0)
+    @NonNull UUID getLogId();
+
+    /**
+     * Gets the log entry being received
+     *
+     * @return the log entry being received
+     */
+    @Param(1)
+    @NonNull Action getEntry();
+
+}
@@ -0,0 +1,29 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+/**
+ * Events relating to the {@link net.luckperms.api.actionlog.ActionLog}.
+ */
+package net.luckperms.api.event.log;
@@ -0,0 +1,57 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.event.node;
+
+import net.luckperms.api.event.util.Param;
+import net.luckperms.api.node.Node;
+import org.checkerframework.checker.nullness.qual.NonNull;
+import org.jetbrains.annotations.Unmodifiable;
+
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.Set;
+
+/**
+ * Called when a node is added to a holder
+ */
+public interface NodeAddEvent extends NodeMutateEvent {
+
+    /**
+     * Gets the node that was added
+     *
+     * @return the node that was added
+     */
+    @Param(3)
+    @NonNull Node getNode();
+
+    @Override
+    default @NonNull @Unmodifiable Set<Node> getDataBefore() {
+        // Get data after, then reverse the action
+        Set<Node> nodes = new HashSet<>(this.getDataAfter());
+        nodes.remove(this.getNode());
+        return Collections.unmodifiableSet(nodes);
+    }
+}
@@ -0,0 +1,58 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.event.node;
+
+import net.luckperms.api.event.util.Param;
+import net.luckperms.api.node.Node;
+import org.checkerframework.checker.nullness.qual.NonNull;
+import org.jetbrains.annotations.Unmodifiable;
+
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.Set;
+
+/**
+ * Called when a holder has their nodes cleared
+ */
+public interface NodeClearEvent extends NodeMutateEvent {
+
+    /**
+     * Gets the nodes that were cleared
+     *
+     * @return the nodes that were removed
+     * @since 5.3
+     */
+    @Param(3)
+    @NonNull @Unmodifiable Set<Node> getNodes();
+
+    @Override
+    default @NonNull @Unmodifiable Set<Node> getDataBefore() {
+        // Get data after, then reverse the action
+        Set<Node> nodes = new HashSet<>(this.getDataAfter());
+        nodes.addAll(this.getNodes());
+        return Collections.unmodifiableSet(nodes);
+    }
+}
@@ -0,0 +1,98 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.event.node;
+
+import net.luckperms.api.event.LuckPermsEvent;
+import net.luckperms.api.event.util.Param;
+import net.luckperms.api.model.PermissionHolder;
+import net.luckperms.api.model.data.DataType;
+import net.luckperms.api.model.group.Group;
+import net.luckperms.api.model.user.User;
+import net.luckperms.api.node.Node;
+import org.checkerframework.checker.nullness.qual.NonNull;
+import org.jetbrains.annotations.Unmodifiable;
+
+import java.util.Set;
+
+/**
+ * Called when a node is added to/removed from a user/group
+ */
+public interface NodeMutateEvent extends LuckPermsEvent {
+
+    /**
+     * Gets the target of the event
+     *
+     * @return the event target
+     */
+    @Param(0)
+    @NonNull PermissionHolder getTarget();
+
+    /**
+     * Gets the data type that was mutated.
+     *
+     * @return the data type
+     */
+    @Param(1)
+    @NonNull DataType getDataType();
+
+    /**
+     * Gets an immutable copy of the holders data before the change
+     *
+     * @return the data before the change
+     */
+    @NonNull @Unmodifiable Set<Node> getDataBefore();
+
+    /**
+     * Gets an immutable copy of the holders data after the change
+     *
+     * @return the data after the change
+     */
+    @Param(2)
+    @NonNull @Unmodifiable Set<Node> getDataAfter();
+
+    /**
+     * Gets whether the target of this event is a {@link User}
+     *
+     * <p>This is equivalent to checking if getTarget() instanceof User</p>
+     *
+     * @return if the event is targeting a user
+     */
+    default boolean isUser() {
+        return getTarget() instanceof User;
+    }
+
+    /**
+     * Gets whether the target of this event is a {@link Group}
+     *
+     * <p>This is equivalent to checking if getTarget() instanceof Group</p>
+     *
+     * @return if the event is targeting a group
+     */
+    default boolean isGroup() {
+        return getTarget() instanceof Group;
+    }
+
+}
@@ -0,0 +1,58 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.event.node;
+
+import net.luckperms.api.event.util.Param;
+import net.luckperms.api.node.Node;
+import org.checkerframework.checker.nullness.qual.NonNull;
+import org.jetbrains.annotations.Unmodifiable;
+
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.Set;
+
+/**
+ * Called when a node is removed from a holder
+ */
+public interface NodeRemoveEvent extends NodeMutateEvent {
+
+    /**
+     * Gets the node that was removed
+     *
+     * @return the node that was removed
+     */
+    @Param(3)
+    @NonNull Node getNode();
+
+    @Override
+    default @NonNull @Unmodifiable Set<Node> getDataBefore() {
+        // Get data after, then reverse the action
+        Set<Node> nodes = new HashSet<>(this.getDataAfter());
+        nodes.add(this.getNode());
+        return Collections.unmodifiableSet(nodes);
+    }
+
+}
@@ -0,0 +1,30 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+/**
+ * Events relating to changes to a {@link net.luckperms.api.model.user.User} or
+ * {@link net.luckperms.api.model.group.Group}s {@link net.luckperms.api.model.data.NodeMap}.
+ */
+package net.luckperms.api.event.node;
@@ -0,0 +1,29 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+/**
+ * Main events package.
+ */
+package net.luckperms.api.event;
@@ -0,0 +1,67 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.event.player;
+
+import net.luckperms.api.event.LuckPermsEvent;
+import net.luckperms.api.event.util.Param;
+import net.luckperms.api.model.PlayerSaveResult;
+import net.luckperms.api.model.user.UserManager;
+import org.checkerframework.checker.nullness.qual.NonNull;
+
+import java.util.UUID;
+
+/**
+ * Called when player data is saved to the storage.
+ *
+ * <p>Data can be saved using {@link UserManager#savePlayerData(UUID, String)}.</p>
+ */
+public interface PlayerDataSaveEvent extends LuckPermsEvent {
+
+    /**
+     * Gets the unique ID that was saved.
+     *
+     * @return the uuid
+     */
+    @Param(0)
+    @NonNull UUID getUniqueId();
+
+    /**
+     * Gets the username that was saved.
+     *
+     * @return the username
+     */
+    @Param(1)
+    @NonNull String getUsername();
+
+    /**
+     * Gets the result of the operation.
+     *
+     * @return the result
+     */
+    @Param(2)
+    @NonNull PlayerSaveResult getResult();
+
+}
@@ -0,0 +1,92 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.event.player;
+
+import net.luckperms.api.event.LuckPermsEvent;
+import net.luckperms.api.event.util.Param;
+import net.luckperms.api.model.user.User;
+import net.luckperms.api.util.Result;
+import org.checkerframework.checker.nullness.qual.NonNull;
+import org.checkerframework.checker.nullness.qual.Nullable;
+
+import java.util.UUID;
+
+/**
+ * Called when LuckPerms has finished processing a Player's initial connection.
+ *
+ * <p>This event will always execute during the platforms async connection
+ * event. The LuckPerms platform listener processing the connection will block
+ * while this event is posted.</p>
+ *
+ * <p>This, among other things, allows you to wait until permission data is
+ * loaded for a User during the BungeeCord 'LoginEvent', as event priorities are
+ * ignored by the current implementation.</p>
+ *
+ * <p>The implementation will make an attempt to ensure this event is called
+ * for all connections, even if the operation to load User data was not
+ * successful. Note that LuckPerms will usually cancel the platform connection
+ * event if data could not be loaded.</p>
+ */
+public interface PlayerLoginProcessEvent extends LuckPermsEvent, Result {
+
+    /**
+     * Gets the UUID of the connection which was processed
+     *
+     * @return the uuid of the connection which was processed
+     */
+    @Param(0)
+    @NonNull UUID getUniqueId();
+
+    /**
+     * Gets the username of the connection which was processed
+     *
+     * @return the username of the connection which was processed
+     */
+    @Param(1)
+    @NonNull String getUsername();
+
+    /**
+     * Gets if the login was processed successfully.
+     *
+     * @return true if the login was successful
+     */
+    @Override
+    default boolean wasSuccessful() {
+        return getUser() != null;
+    }
+
+    /**
+     * Gets the resultant User instance which was loaded.
+     *
+     * <p>Returns {@code null} if the login was not processed
+     * {@link #wasSuccessful() successfully.}</p>
+     *
+     * @return the user instance
+     */
+    @Param(2)
+    @Nullable User getUser();
+
+}
@@ -0,0 +1,101 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.event.player.lookup;
+
+import net.luckperms.api.event.LuckPermsEvent;
+import net.luckperms.api.event.type.ResultEvent;
+import net.luckperms.api.event.util.Param;
+import org.checkerframework.checker.nullness.qual.NonNull;
+
+import java.util.Objects;
+import java.util.UUID;
+
+/**
+ * Called when the platform needs to determine the type of a player's {@link UUID unique id}.
+ *
+ * @since 5.3
+ */
+public interface UniqueIdDetermineTypeEvent extends LuckPermsEvent, ResultEvent<String> {
+
+    /**
+     * The players UUID has been obtained by authenticating with the Mojang session servers.
+     *
+     * <p>Usually indicated by the UUID being {@link UUID#version() version} 4.</p>
+     */
+    String TYPE_AUTHENTICATED = "authenticated";
+
+    /**
+     * The players UUID has not been obtained through authentication, and instead is likely based
+     * on the username they connected with.
+     *
+     * <p>Usually indicated by the UUID being {@link UUID#version() version} 3.</p>
+     */
+    String TYPE_UNAUTHENTICATED = "unauthenticated";
+
+    /**
+     * The players UUID most likely belongs to a NPC (non-player character).
+     *
+     * <p>Usually indicated by the UUID being {@link UUID#version() version} 2.</p>
+     *
+     * @since 5.4
+     */
+    String TYPE_NPC = "npc";
+
+    /**
+     * Unknown UUID type.
+     *
+     * @since 5.4
+     */
+    String TYPE_UNKNOWN = "unknown";
+
+    /**
+     * Gets the {@link UUID unique id} being queried.
+     *
+     * @return the unique id
+     */
+    @Param(0)
+    @NonNull UUID getUniqueId();
+
+    /**
+     * Gets the current result unique id type.
+     *
+     * @return the type
+     */
+    default @NonNull String getType() {
+        return result().get();
+    }
+
+    /**
+     * Sets the result unique id type.
+     *
+     * @param type the type
+     */
+    default void setType(@NonNull String type) {
+        Objects.requireNonNull(type, "type");
+        result().set(type);
+    }
+
+}
@@ -0,0 +1,60 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.event.player.lookup;
+
+import net.luckperms.api.event.LuckPermsEvent;
+import net.luckperms.api.event.type.ResultEvent;
+import net.luckperms.api.event.util.Param;
+import org.checkerframework.checker.nullness.qual.NonNull;
+import org.checkerframework.checker.nullness.qual.Nullable;
+
+import java.util.UUID;
+
+/**
+ * Called when the platform needs a unique id for a given username.
+ *
+ * @since 5.3
+ */
+public interface UniqueIdLookupEvent extends LuckPermsEvent, ResultEvent<UUID> {
+
+    /**
+     * Gets the username being looked up.
+     *
+     * @return the username
+     */
+    @Param(0)
+    @NonNull String getUsername();
+
+    /**
+     * Sets the result unique id.
+     *
+     * @param uniqueId the unique id
+     */
+    default void setUniqueId(@Nullable UUID uniqueId) {
+        result().set(uniqueId);
+    }
+
+}
@@ -0,0 +1,60 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.event.player.lookup;
+
+import net.luckperms.api.event.LuckPermsEvent;
+import net.luckperms.api.event.type.ResultEvent;
+import net.luckperms.api.event.util.Param;
+import org.checkerframework.checker.nullness.qual.NonNull;
+import org.checkerframework.checker.nullness.qual.Nullable;
+
+import java.util.UUID;
+
+/**
+ * Called when the platform needs a username for a given unique id.
+ *
+ * @since 5.3
+ */
+public interface UsernameLookupEvent extends LuckPermsEvent, ResultEvent<String> {
+
+    /**
+     * Gets the {@link UUID unique id} being looked up.
+     *
+     * @return the unique id
+     */
+    @Param(0)
+    @NonNull UUID getUniqueId();
+
+    /**
+     * Sets the result username.
+     *
+     * @param username the username
+     */
+    default void setUsername(@Nullable String username) {
+        result().set(username);
+    }
+
+}
@@ -0,0 +1,75 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.event.player.lookup;
+
+import net.luckperms.api.event.LuckPermsEvent;
+import net.luckperms.api.event.util.Param;
+import org.checkerframework.checker.nullness.qual.NonNull;
+
+import java.util.concurrent.atomic.AtomicBoolean;
+
+/**
+ * Called when the validity of a username is being tested.
+ *
+ * @since 5.3
+ */
+public interface UsernameValidityCheckEvent extends LuckPermsEvent {
+
+    /**
+     * Gets the username being tested.
+     *
+     * @return the username
+     */
+    @Param(0)
+    @NonNull String getUsername();
+
+    /**
+     * Gets the current validity state for the username.
+     *
+     * @return the validity state
+     */
+    @Param(1)
+    @NonNull AtomicBoolean validityState();
+
+    /**
+     * Gets if the username is currently considered to be valid.
+     *
+     * @return if the username is valid
+     */
+    default boolean isValid() {
+        return validityState().get();
+    }
+
+    /**
+     * Sets if the username should be considered valid or not.
+     *
+     * @param valid whether the username is valid
+     */
+    default void setValid(boolean valid) {
+        validityState().set(valid);
+    }
+
+}
@@ -0,0 +1,29 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+/**
+ * Events relating to a player {@link java.util.UUID unique id} or username lookup.
+ */
+package net.luckperms.api.event.player.lookup;
@@ -0,0 +1,29 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+/**
+ * Events relating to a player.
+ */
+package net.luckperms.api.event.player;
@@ -0,0 +1,43 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.event.source;
+
+import net.luckperms.api.platform.PlatformEntity;
+import org.checkerframework.checker.nullness.qual.NonNull;
+
+/**
+ * Represents an {@link PlatformEntity} which was the {@link Source} of something.
+ */
+public interface EntitySource extends Source {
+
+    /**
+     * Gets the entity.
+     *
+     * @return the entity
+     */
+    @NonNull PlatformEntity getEntity();
+
+}
@@ -0,0 +1,63 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.event.source;
+
+import net.luckperms.api.platform.PlatformEntity;
+import org.checkerframework.checker.nullness.qual.NonNull;
+
+/**
+ * Represents the source of an event.
+ *
+ * <p>Could also be described as the "thing" that caused an event to occur.</p>
+ */
+public interface Source {
+
+    /**
+     * Gets the source type
+     *
+     * @return the type
+     */
+    @NonNull Type getType();
+
+    /**
+     * Represents a type of source
+     */
+    enum Type {
+
+        /**
+         * Represents an {@link PlatformEntity} source
+         *
+         * @see EntitySource
+         */
+        ENTITY,
+
+        /**
+         * Represents an unknown source
+         */
+        UNKNOWN
+    }
+
+}
@@ -0,0 +1,29 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+/**
+ * Event sources.
+ */
+package net.luckperms.api.event.source;
@@ -0,0 +1,35 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.event.sync;
+
+import net.luckperms.api.event.LuckPermsEvent;
+
+/**
+ * Called when the configuration is reloaded
+ */
+public interface ConfigReloadEvent extends LuckPermsEvent {
+
+}
@@ -0,0 +1,35 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.event.sync;
+
+import net.luckperms.api.event.LuckPermsEvent;
+
+/**
+ * Called when an sync task has been completed
+ */
+public interface PostSyncEvent extends LuckPermsEvent {
+
+}
@@ -0,0 +1,48 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.event.sync;
+
+import net.luckperms.api.event.LuckPermsEvent;
+import net.luckperms.api.event.type.Cancellable;
+import net.luckperms.api.event.util.Param;
+import org.checkerframework.checker.nullness.qual.NonNull;
+
+import java.util.UUID;
+
+/**
+ * Called before a received network sync task runs
+ */
+public interface PreNetworkSyncEvent extends LuckPermsEvent, Cancellable {
+
+    /**
+     * Gets the ID of the sync request
+     *
+     * @return the id of the sync request
+     */
+    @Param(0)
+    @NonNull UUID getSyncId();
+
+}
@@ -0,0 +1,36 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.event.sync;
+
+import net.luckperms.api.event.LuckPermsEvent;
+import net.luckperms.api.event.type.Cancellable;
+
+/**
+ * Called before a sync task runs
+ */
+public interface PreSyncEvent extends LuckPermsEvent, Cancellable {
+
+}
@@ -0,0 +1,29 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+/**
+ * Events relating to {@link net.luckperms.api.LuckPerms#runUpdateTask() sync/update task}s.
+ */
+package net.luckperms.api.event.sync;
@@ -0,0 +1,55 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.event.track;
+
+import net.luckperms.api.event.LuckPermsEvent;
+import net.luckperms.api.event.cause.CreationCause;
+import net.luckperms.api.event.util.Param;
+import net.luckperms.api.track.Track;
+import org.checkerframework.checker.nullness.qual.NonNull;
+
+/**
+ * Called when a track is created
+ */
+public interface TrackCreateEvent extends LuckPermsEvent {
+
+    /**
+     * Gets the new track
+     *
+     * @return the new track
+     */
+    @Param(0)
+    @NonNull Track getTrack();
+
+    /**
+     * Gets the cause of the creation
+     *
+     * @return the cause of the creation
+     */
+    @Param(1)
+    @NonNull CreationCause getCause();
+
+}
@@ -0,0 +1,64 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.event.track;
+
+import net.luckperms.api.event.LuckPermsEvent;
+import net.luckperms.api.event.cause.DeletionCause;
+import net.luckperms.api.event.util.Param;
+import org.checkerframework.checker.nullness.qual.NonNull;
+
+import java.util.List;
+
+/**
+ * Called when a track is deleted
+ */
+public interface TrackDeleteEvent extends LuckPermsEvent {
+
+    /**
+     * Gets the name of the deleted track
+     *
+     * @return the name of the deleted track
+     */
+    @Param(0)
+    @NonNull String getTrackName();
+
+    /**
+     * Gets an immutable copy of the tracks existing data
+     *
+     * @return a copy of the tracks existing data
+     */
+    @Param(1)
+    @NonNull List<String> getExistingData();
+
+    /**
+     * Gets the cause of the deletion
+     *
+     * @return the cause of the deletion
+     */
+    @Param(2)
+    @NonNull DeletionCause getCause();
+
+}
@@ -0,0 +1,37 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.event.track;
+
+import net.luckperms.api.event.LuckPermsEvent;
+
+/**
+ * Called when all tracks have been loaded in from storage.
+ *
+ * <p>Usually only called on startup and in sync tasks.</p>
+ */
+public interface TrackLoadAllEvent extends LuckPermsEvent {
+
+}
@@ -0,0 +1,48 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.event.track;
+
+import net.luckperms.api.event.LuckPermsEvent;
+import net.luckperms.api.event.util.Param;
+import net.luckperms.api.track.Track;
+import org.checkerframework.checker.nullness.qual.NonNull;
+
+/**
+ * Called when a track is loaded into memory from the storage.
+ *
+ * Note that this event is not the same as {@link TrackCreateEvent}
+ */
+public interface TrackLoadEvent extends LuckPermsEvent {
+
+    /**
+     * Gets the track that was loaded
+     *
+     * @return the track that was loaded
+     */
+    @Param(0)
+    @NonNull Track getTrack();
+
+}
@@ -0,0 +1,44 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.event.track.mutate;
+
+import net.luckperms.api.event.util.Param;
+import org.checkerframework.checker.nullness.qual.NonNull;
+
+/**
+ * Called when a group is added to a track
+ */
+public interface TrackAddGroupEvent extends TrackMutateEvent {
+
+    /**
+     * Gets the group that was added
+     *
+     * @return the group that was added
+     */
+    @Param(3)
+    @NonNull String getGroup();
+
+}
@@ -0,0 +1,33 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.event.track.mutate;
+
+/**
+ * Called when a track is cleared
+ */
+public interface TrackClearEvent extends TrackMutateEvent {
+
+}
@@ -0,0 +1,65 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.event.track.mutate;
+
+import net.luckperms.api.event.LuckPermsEvent;
+import net.luckperms.api.event.util.Param;
+import net.luckperms.api.track.Track;
+import org.checkerframework.checker.nullness.qual.NonNull;
+import org.jetbrains.annotations.Unmodifiable;
+
+import java.util.List;
+
+/**
+ * Called when a track is changed
+ */
+public interface TrackMutateEvent extends LuckPermsEvent {
+
+    /**
+     * Gets the track that was mutated
+     *
+     * @return the track that was mutated
+     */
+    @Param(0)
+    @NonNull Track getTrack();
+
+    /**
+     * Gets an immutable copy of the tracks data before the change
+     *
+     * @return the data before the change
+     */
+    @Param(1)
+    @NonNull @Unmodifiable List<String> getStateBefore();
+
+    /**
+     * Gets an immutable copy of the tracks data after the change
+     *
+     * @return the data after the change
+     */
+    @Param(2)
+    @NonNull @Unmodifiable List<String> getStateAfter();
+
+}
@@ -0,0 +1,44 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.event.track.mutate;
+
+import net.luckperms.api.event.util.Param;
+import org.checkerframework.checker.nullness.qual.NonNull;
+
+/**
+ * Called when a group is removed from a track
+ */
+public interface TrackRemoveGroupEvent extends TrackMutateEvent {
+
+    /**
+     * Gets the group that was removed
+     *
+     * @return the group that was removed
+     */
+    @Param(3)
+    @NonNull String getGroup();
+
+}
@@ -0,0 +1,29 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+/**
+ * Events relating to changes to a {@link net.luckperms.api.track.Track}s contents.
+ */
+package net.luckperms.api.event.track.mutate;
@@ -0,0 +1,29 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+/**
+ * Events relating to {@link net.luckperms.api.track.Track}s.
+ */
+package net.luckperms.api.event.track;
@@ -0,0 +1,74 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.event.type;
+
+import net.luckperms.api.event.util.Param;
+import org.checkerframework.checker.nullness.qual.NonNull;
+
+import java.util.concurrent.atomic.AtomicBoolean;
+
+/**
+ * Represents an event that can be cancelled
+ */
+public interface Cancellable {
+
+    /**
+     * Gets an {@link AtomicBoolean} holding the cancellation state of the event
+     *
+     * @return the cancellation
+     */
+    @Param(-1)
+    @NonNull AtomicBoolean cancellationState();
+
+    /**
+     * Returns true if the event is currently cancelled.
+     *
+     * @return if the event is cancelled
+     */
+    default boolean isCancelled() {
+        return cancellationState().get();
+    }
+
+    /**
+     * Returns true if the event is not currently cancelled.
+     *
+     * @return if the event is not cancelled
+     */
+    default boolean isNotCancelled() {
+        return !isCancelled();
+    }
+
+    /**
+     * Sets the cancellation state of the event.
+     *
+     * @param cancelled the new state
+     * @return the previous state
+     */
+    default boolean setCancelled(boolean cancelled) {
+        return cancellationState().getAndSet(cancelled);
+    }
+
+}
@@ -0,0 +1,58 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.event.type;
+
+import net.luckperms.api.event.util.Param;
+import org.checkerframework.checker.nullness.qual.NonNull;
+
+import java.util.concurrent.atomic.AtomicReference;
+
+/**
+ * Represents an event that has a result.
+ *
+ * @param <T> the type of the result
+ * @since 5.3
+ */
+public interface ResultEvent<T> {
+
+    /**
+     * Gets an {@link AtomicReference} containing the result.
+     *
+     * @return the result
+     */
+    @Param(-1)
+    @NonNull AtomicReference<T> result();
+
+    /**
+     * Gets if a result has been set for the event.
+     *
+     * @return if there is a result
+     */
+    default boolean hasResult() {
+        return result().get() != null;
+    }
+
+}
@@ -0,0 +1,47 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.event.type;
+
+import net.luckperms.api.event.source.Source;
+import net.luckperms.api.event.util.Param;
+import org.checkerframework.checker.nullness.qual.NonNull;
+
+/**
+ * Represents an event with a {@link Source}.
+ */
+public interface Sourced {
+
+    /**
+     * Gets the events source.
+     *
+     * <p>Never returns null. In situations where the source is unknown, a
+     * {@link Source} with type {@link Source.Type#UNKNOWN} is returned.</p>
+     *
+     * @return the source
+     */
+    @NonNull @Param(-1) Source getSource();
+
+}
@@ -0,0 +1,29 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+/**
+ * Event abstract types.
+ */
+package net.luckperms.api.event.type;
@@ -0,0 +1,55 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.event.user;
+
+import net.luckperms.api.cacheddata.CachedDataManager;
+import net.luckperms.api.event.LuckPermsEvent;
+import net.luckperms.api.event.util.Param;
+import net.luckperms.api.model.user.User;
+import org.checkerframework.checker.nullness.qual.NonNull;
+
+/**
+ * Called when a users {@link CachedDataManager} is loaded.
+ */
+public interface UserCacheLoadEvent extends LuckPermsEvent {
+
+    /**
+     * Gets the user whose data was loaded
+     *
+     * @return the user
+     */
+    @Param(0)
+    @NonNull User getUser();
+
+    /**
+     * Gets the data that was loaded
+     *
+     * @return the loaded data
+     */
+    @Param(1)
+    @NonNull CachedDataManager getLoadedData();
+
+}
@@ -0,0 +1,55 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.event.user;
+
+import net.luckperms.api.cacheddata.CachedDataManager;
+import net.luckperms.api.event.LuckPermsEvent;
+import net.luckperms.api.event.util.Param;
+import net.luckperms.api.model.user.User;
+import org.checkerframework.checker.nullness.qual.NonNull;
+
+/**
+ * Called when a users cached data is refreshed
+ */
+public interface UserDataRecalculateEvent extends LuckPermsEvent {
+
+    /**
+     * Gets the user whose data was recalculated
+     *
+     * @return the user
+     */
+    @Param(0)
+    @NonNull User getUser();
+
+    /**
+     * Gets the data that was recalculated
+     *
+     * @return the data
+     */
+    @Param(1)
+    @NonNull CachedDataManager getData();
+
+}
@@ -0,0 +1,63 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.event.user;
+
+import net.luckperms.api.event.LuckPermsEvent;
+import net.luckperms.api.event.util.Param;
+import org.checkerframework.checker.nullness.qual.NonNull;
+
+import java.util.UUID;
+
+/**
+ * Called when the user logs into the network for the first time.
+ *
+ * <p>Particularly useful for networks with multiple
+ * lobbies, who want to welcome a user when they join for the first time.</p>
+ *
+ * <p>This event is fired before the player has actually joined the game on the async login / auth event. If you want to
+ * do something with the user, store the UUID in a set, and then check the set in the PlayerJoinEvent o.e.</p>
+ *
+ * <p>The users data will not be loaded when this event is called.</p>
+ */
+public interface UserFirstLoginEvent extends LuckPermsEvent {
+
+    /**
+     * Gets the UUID of the user
+     *
+     * @return the uuid of the user
+     */
+    @Param(0)
+    @NonNull UUID getUniqueId();
+
+    /**
+     * Gets the username of the user
+     *
+     * @return the username of the user
+     */
+    @Param(1)
+    @NonNull String getUsername();
+
+}
@@ -0,0 +1,46 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.event.user;
+
+import net.luckperms.api.event.LuckPermsEvent;
+import net.luckperms.api.event.util.Param;
+import net.luckperms.api.model.user.User;
+import org.checkerframework.checker.nullness.qual.NonNull;
+
+/**
+ * Called when a user is loaded into memory from the storage.
+ */
+public interface UserLoadEvent extends LuckPermsEvent {
+
+    /**
+     * Gets the user that was loaded
+     *
+     * @return the user that was loaded
+     */
+    @Param(0)
+    @NonNull User getUser();
+
+}
@@ -0,0 +1,49 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package net.luckperms.api.event.user;
+
+import net.luckperms.api.event.LuckPermsEvent;
+import net.luckperms.api.event.type.Cancellable;
+import net.luckperms.api.event.util.Param;
+import net.luckperms.api.model.user.User;
+import org.checkerframework.checker.nullness.qual.NonNull;
+
+/**
+ * Called when a user is about to be unloaded from memory.
+ *
+ * @since 5.3
+ */
+public interface UserUnloadEvent extends LuckPermsEvent, Cancellable {
+
+    /**
+     * Gets the user that is being unloaded
+     *
+     * @return the user that is being unloaded
+     */
+    @Param(0)
+    @NonNull User getUser();
+
+}