---
name: "dg-epsilon"
description: "Guidance for migrating a Postgres schema without downtime, covering expand-and-contract, backfills, and lock avoidance. Trigger on schema migration, ALTER TABLE, zero-downtime deploy, or a user pasting a migration file."
metadata:
  version: "0.1.0"
  tier: universal
  status: active
---

# dg-epsilon

Do nothing.