Guidance for building, updating, reviewing, or debugging Minecraft Paper server plugins in Java or Kotlin. Use when Codex works on Paper/PaperMC plugin projects, Gradle setup, paper-plugin.yml or plugin.yml descriptors, commands, Adventure components, Dialog API UI, PDC, item data components, registries, recipes, scheduler or Folia-safe code, events, plugin messaging, configuration, persistence, databases, or Paper API migration from Bukkit/Spigot patterns.
2026-05-16