What is schema design?

Schema design is a concept in personal epistemology: Everything that follows builds on your ability to create inspect and improve schemas.

Example: A software architect joins a new company and inherits a codebase with no documentation, inconsistent naming, and tribal knowledge spread across a dozen engineers' heads. She does not start by writing code. She starts by constructing a schema: entity types, relationship maps, data flow diagrams, naming conventions. Her colleagues call this 'onboarding.' She calls it what it is — schema construction. Within two weeks, she can navigate the system faster than engineers who have been there for years. Not because she knows more facts. Because she has a better organizational structure for the facts she does know. Every subsequent decision she makes — refactoring, feature design, debugging — operates through that schema. The schema is not a byproduct of understanding. It is the mechanism of understanding.

This concept is part of Phase 11 (Schema Foundations) in the How to Think curriculum, which builds the epistemic infrastructure for schema foundations.