Docket: Plugin Compatibility Scanner
Plugin compatibility auditing for Paper and Spigot servers.
Docket runs a compatibility scan on every startup and prints the results directly in your console. It checks hard dependency gaps, command collisions, and event-listener priority conflicts across all installed plugins, grouped by severity with a server health score.
No configuration required. Drop the jar in and it works.
What's Included
- Bytecode event analysis: reads plugin JARs using ASM 9.7 to map event handlers and detect listener priority conflicts
- Dependency auditing: flags missing hard dependencies and circular dependency chains
- Luckperms Compatibility: has permission nodes for full luckperms compatibility
- Command collision detection: identifies overlapping command registrations across plugins
- Health score: rates your server as Great, Good, Mild, or Bad with a full findings breakdown
- Discord webhook: posts scan reports to a channel on startup or rescan, no bot required
- In-game report: paginated
/plugincheckoutput with colour-coded findings and clickable navigation - Large server support: bytecode analysis can be disabled in config if startup performance is a concern
Requirements
| Server | Paper 1.21+ or Spigot 1.21+ |
| Java | 21 or newer |
Installation
Drop docket-plugin-compatibility-1.0-RELEASE.jar into your server's plugins/ folder and restart. The scan runs automatically with no additional setup. See USAGE.md for commands, configuration, and Discord setup.
Credits
| Development | Docket Contributors |
| Bytecode Analysis | ASM Library by OW2 Consortium |
| Server API | PaperMC Team |
License
Released under the Apache License 2.0. See LICENSE for full terms.
Paper 1.21+ · Spigot-compatible · Java 21+
- Edition: Minecraft Java
- File type: .jar
- Minecraft versions listed: 1.21, 1.21.1, 1.21.2
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on Modrinth — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
- Ships as docket-plugin-compatibility-1.0-RC.jar — drop this file into the mods folder
- Download size: 168 KB
- Download link checked 7 Sept 2026 — working
These come from our own check of the pack file, not from the source page.