Document 1.8.7 alpha release and security boundaries
Expand full-project and shared-workspace manual with current diagrams
Add efficiency, technical, stack, about, and lifecycle guides
Document exact .SYSTEMX casing, alias setup, and version 1.4.0
Document multi-location setup, library, and version-preserving updates
Document SYSTEMX 1.2.0 public format and workflow
Publish SYSTEMX guides for setup, planning, agents, memory, and operations