The Plex Modules Gradle Plugin is a build tool for authors of Plex modules. It adds a plexLibrary dependency configuration that lets a module declare the runtime libraries Plex should load before the module starts, then injects those Maven coordinates and the module project's Maven repositories into module.yml during the build so Plex can resolve them at runtime. Dependencies are validated to require an explicit, fixed version with no classifiers or dynamic selectors, keeping module metadata reproducible and unambiguous.