Ontology Building · mgillett43 bundle Builds, extends, reviews, or audits an ontology, domain model, conceptual/data model, taxonomy, or knowledge-graph/property-graph schema — deciding what entities, classes, relations, or aggregates should exist, how to shape a class or role hierarchy, how to scope with competency questions, and how to validate coherence (is-a correctness, anti-patterns, agent-actionability). Use when designing a data model, building a taxonomy, modeling a domain, defining a class hierarchy or knowledge-graph schema, or reviewing an existing ontology/domain model for coherence or AI-agent fitness. Skip for trained ML/statistical models, or routine schema tweaks with no structural decision.