Generate Design Schemas

Start with the 20 assemblies, corresponding to the 20 Trades'
Break each assembly into one or more dozensubassemblies - or what is commonly known as modules (wall modules, roof modules, floor modules, plumbing modules, electrical modules, etc). This gets us to 100-200 individual modules.
For each module - extract each module from the FreeCAD file - such as Seed_Eco-Home_4_3D_CAD#Master_Files
Now extract the design language - the schema - the parametric definition of how each module is built. Document this in a Google Slides working doc, which includes possibility of swarm collaboration
Also extract the interface design - how modules with with other modules, and how these modules fit with other assemblies.
Codify all this as human language, diagrams, and other explanatory material in google slides. See Example of PV Mounting Schema
Continue upgrading the working doc with supporting information such as datasheets, pictures, real builds, sourcing links, and other details into the working doc.

Step by Step

Detail the design diagrams in Google Slides or similar collaborative realtime diagramming
Download in JPG or PNG and feed to ChatGPT or other AI
Give AI Instruction to Create Schema in YAML