Overview

First program

namespace demo

expose def add(a: int, b: int) -> int:
    return a + b

Functions compile to internal ID-based functions. expose also creates a stable, named wrapper that other packs can call.

Runtime model

• Each namespace has its own scoreboard.
• Integer and boolean values use scoreboard players.
• Strings, lists, and structured values use command storage.
• Entity values use tags and UUID-backed objects.
• Functions exchange values through reserved runtime locations.

Source files

DataCraft source files use the .dcraft extension. A project may contain several source files under its configured source directory; imports resolve across those files.

Core rules

• Function parameters and return values are typed.
• None is capitalized and only allowed by nullable types.
• A bool is a restricted integer whose value is 0 or 1.
• Collections are homogeneous unless their declared element type permits otherwise.