Command Actions

Function files are placed in folders named after the event they should run on, and the mod calls them when that event fires. Functions are detected whether they carry the .mcfunction extension or none at all, and subdirectories are scanned recursively, so nested folders are picked up as well. A file-system event triggers a reload so that changes to the files take effect without restarting the server.

The function files can use preprocessing directives. These include conditional blocks with if, elif, else and endif, where a condition is true when a given macro evaluates to a nonzero number or equation result, and comparisons that test two values for equality or inequality. Macros can be defined for later replacement and removed once defined, and the system-provided macros are available as well. A list of built-in macros, including those supplied by other mods, is available under a prefix starting with C.

Command Actions is a server-side mod with no client part, so players join without installing anything and only the server needs the file. It requires Quilt Kotlin Libraries (QKL). The mod is published for Quilt and only for 1.19.2, and it is open source under the MIT License.