Foundation.v1.9.0.33.zip

If you are looking for the "long paper" style of detailed breakdown, the best resources are:

: The update introduced a modular "sub-building" flow, allowing complex structures like Monasteries or Manors to be built as collections of functional parts rather than single entities. Foundation.v1.9.0.33.zip

The v1.9 cycle represented a "foundation" rewrite of the game's core systems, which is likely why you are looking for a deep dive into its structure: If you are looking for the "long paper"