---
id: decisions.2026-02-01-postgres
type: decision
layer: L5
title: Use Postgres for Core
authority: historical
owner: cto
status: superseded
version: 1
durability: permanent
classification: internal
canonical_source: true
created: 2026-02-01T00:00:00Z
updated: 2026-02-01T00:00:00Z
decision: Core stores transactional data in a single Postgres instance.
rationale:
  - One writable store keeps the consistency story simple.
superseded_by: decisions.2026-08-01-postgres-ha
tags: [datastore]
---

Kept, not deleted. Reading why a decision was originally made is most of the
value of having reversed it.