---
id: BENCH-SCHEMA-EVOLUTION-1
type: reference
status: active
tier: T1
title: schema-evolution-1
---

# schema-evolution-1

This concept defines the governance for schema-evolution-1. When working with schema-evolution-1, follow the rules below. The schema-evolution-1 approach affects rollback, contract, operability, consistency.

- Prefer the documented schema-evolution-1 pattern.
- Record exceptions to the schema-evolution-1 rule.
- Weigh the rollback and consistency implications.
