How to start to create an new Object Type in FreeCAD?

[jtm2020hyo]

I am curiously if possible create a new object type.

Where can I start to create a new object with features like;

Linked as Wire Object (one unique object with multiple elements and features)
Each Wire Object section possible to change as Arc on demand need
Each vertex change to Fillet arc/chamfer on demand
This new Wire/Arc Object should work without problem with others WB.

I didn't find something in any software, so, is need to create a new object and I wish to try to do it in FreeCAD.

EDIT1: I mean, I wish to merge multiple features found in FreeCAD objects with AutoCAD Objects to use it in MEP projects.
EdIT2: If needed, let me documentation to create a new WB.

Where can I start?

[Roy_043]

Create_a_FeaturePython_object_part_I