Principlev1
Periodically verify that your documented schemas match
Periodically verify that your documented schemas match current operational reality by directly observing the system rather than consulting representations.
Why This Is a Principle
Derives from Abstraction Necessarily Discards Information (abstraction discards information) and No Direct Access to Reality (no direct access to reality, all mediated). The principle prescribes periodic reality-checking to counteract inevitable drift between map and territory. It's actionable and general across contexts where schemas are used.