Schema Drift
Kind: anti-pattern
Layer: Enforcement Core
Record: architecture:schema-drift
Severity: discouraged
Scope: contract_compatibility, security_governance, model_governance
Formed by: Allow producers, consumers, storage models, and documentation to evolve independently without versioned schema governance, then let payload meaning diverge over time.
Canonical: Ontology
A defect in which the producers, consumers and stores of one payload evolve its shape independently until its meaning diverges.
Listed in Architecture principles, after Concrete Coupling and before Implicit Contract.