What is schema migration?

Schema migration is a concept in personal epistemology: When you update a schema you must also update everything built on top of it.

Example: You revise your understanding of what 'productive' means — from hours worked to problems solved. But your daily planning system still tracks hours, your self-evaluation still rewards long sessions, and your team expectations still anchor to presence. One updated schema. Five downstream structures still running on the old version. Until you migrate them all, your new understanding fights your old infrastructure every day.

This concept is part of Phase 16 (Schema Evolution) in the How to Think curriculum, which builds the epistemic infrastructure for schema evolution.