The middle layer between the whitepaper (thesis) and the engram API
reference (surface): how the mind is designed and why, as tiered
subsystems (LIVE/STAGED/DESIGNED). Covers the geometry thesis, engram
durability and the two-store topology (with the cultivate write-through
gap flagged as a known issue), reified Neighborhood nodes, the body/orbit
model, the operator/language/interoception/reasoning faculties, the self
and the cultivate gate, the fact boundary, the topology findings
(genus-0 expander, not a torus), and the design principles.
