Software as a service (SaaS) featuring a secure, read-only repository for the immutable storage and governance of approved semantic domain models derived through a domain-driven design process; providing an online governance platform wherein canonical, SME-approved domain models serve as the sole authoritative source from which software implementation artifacts are generated as deterministic projections; software as a service featuring version-controlled, access-restricted storage of formalized business domain knowledge for use exclusively in automated, traceable software generation pipelines; providing a governance and audit layer for semantic domain models used in software modernization and code generation.