# Target architecture

Core and Abstractions have no Autodesk, WinForms or WPF references. Only `PRecAnnot.Plant3D2026` may reference installed Autodesk assemblies. DWG mutation remains synchronous on AutoCAD's thread; no `Task.Run` is used for database operations. Ribbon registration is guarded and unloadable. The bundle has one entry assembly and no legacy `_netload` chain.