Agent Skills: fa-architecture

Provides Gaia architecture documentation guidance that keeps docs, README messaging, and design decisions aligned to the current operating model. Use it by updating the relevant files under /docs/architecture/ (system components, use cases, class diagrams, UI) before any planning or implementation that changes structure, then resolving doc↔code drift before resuming feature work. Use it when system structure, trust boundaries, interfaces, workflows, ownership, or architectural assumptions change, or when architecture drift blocks planning or delivery.