WorldAPI 4.0 keeps one way for other plugins to share their data: the expansion API. Nothing changes for clients, sites, or the MCP server; only plugins that still use the older bridge need an update.

• 💥 Breaking: the bridge is gone. The java.util.function.Function WorldAPI put in Bukkit's ServicesManager for other plugins, with requests as maps, no longer exists. A plugin that still registers through it finds nothing and shares nothing, without an error. Plugins share through the expansion API, com.mairwunnx:worldapi-expansion on Maven Central since 3.4.0, under the same namespaces, paths, and topics. Mo’Bosses moved in 2.9.0, so update it to 2.9.0 or newer before WorldAPI, or its data drops out of /extensions/mobosses until you do.