JsonWrangler

JsonWrangler parses each original JSON file into a map that Groovy scripts can read and edit before the game loads it. Scripts are packaged inside resource data packs and resource packs, and JsonWrangler loads them and runs them on the server or the client. Because the scripts run arbitrary code, they can change almost any value that a JSON resource holds.

When several scripts from different datapacks or resource packs target the same file, they run in order: the pack with the highest priority at the top runs first, and the pack with the lowest priority at the bottom runs last. A script can call a method that overrides the changes made by later scripts, so the author of an earlier script controls the outcome. Players may also prefer scripts taken from a server pack, after copying a local pack first.

The mod needs GroovyDuvet, and it also needs either Quilted Fabric API (QFAPI) or Quilt Standard Libraries (QSL). Files are published for Forge and Quilt across the 1.19.4 and 1.20.1 game versions, with 0.1.3 as the latest file for 1.19.4. Either side can run it, and neither needs it, and the mod is open source under the GNU Lesser General Public License v3.0 or later.