A B C same codebase — different models — shared edges the model is the asset the code is a byproduct formation the working theory forms through encounter — bugs chased, designs questioned, moments of clarity. the right interaction model accelerates this cycle. transmission but the model doesn't stay personal. externalized as a framework — a steering file, an agent, a test suite — it becomes a scaffold for the next person. the next person starts where you ended. lineage the bone didn't change one ape. it changed a lineage. models that compound across people are how tools become civilizations. Polanyi · Vygotsky · Engelbart · Kubrick