Principlev1
Archive old schemas with documentation of what they handled
Archive old schemas with documentation of what they handled well rather than deleting them, because they encode information about what works under specific conditions that new schemas should incorporate.
Why This Is a Principle
Derives from Schemas as Knowledge Organization Structures (schemas organize knowledge), Memory is reconstructive, not reproductive—humans rebuild (memory is reconstructive), and Extinction does not erase original learning but creates (extinction creates overlaying associations, doesn't erase original learning). This principle tells you to PRESERVE rather than erase during updates. Clearly derived from how memory and learning persist.