---
id: BENCH-OLD-SCHEMA-EVOLUTION-3
type: standard
status: superseded
tier: T1
title: schema-evolution-3
superseded_by: BENCH-NEW-SCHEMA-EVOLUTION-3
---

# schema-evolution-3

This concept defines the governance for schema-evolution-3. When working with schema-evolution-3, follow the rules below. The schema-evolution-3 approach affects guardrail, dependency, observability, invariant.

- Prefer the documented schema-evolution-3 pattern.
- Record exceptions to the schema-evolution-3 rule.
- Weigh the guardrail and invariant implications.
