Cobble

What Cobble is

Cobble is a free, open-source tool that turns .cbl source into data packs for Minecraft Java Edition. Its language uses Python-like syntax for functions, imports, indentation, and control flow, with static type inference for variables, constants, and expressions. Generated packs can include functions, tags, predicates, advancements, loot tables, recipes, item modifiers, dialogs, and other JSON resources. Cobble also supports Minecraft command JSON safety, macro parameters, and command validation. The command-line workflow includes project setup, formatting, building, checking, watching, validation, inspection, linking, cleanup, and ZIP output. Users can install the stable release with Cargo or use a browser compiler whose parser and transpiler run through WebAssembly; the browser tool can download generated files or a pack ZIP. The project lists Minecraft Java Edition 26.1.2 and pack format 101.1 as its target. Cobble is pre-1.0 and under active development, so bugs and API changes are possible. Validation may require curl and Java when the default command data file is absent.