Module format 

The source formats: .ymodel (a skeleton of bones with cubes) and .yanim (clips of keyframes). Java model space — pixels, y down, as CubeListBuilder and PartPose (what Blockbench’s “Modded Entity” makes); angles in degrees.

Structs

AnimFile

A .yanim: clips by name.

BoneDef

A bone: a pivot, a rest turn, cubes, and points to follow (locators).

ClipDef

One animation.

CubeDef

A box (addBox), textured box-UV from uv.

KeyDef

A keyframe: [x, y, z], or { "value": [x, y, z], "ease": "smooth" }.

ModelFile

A .ymodel.

TracksDef

A bone’s keyframes: time in seconds ("0.25") → value.

Enums

Ease

How a keyframe goes to the next one.

Loop

What a clip does when it runs past its end.