# ADR-023: Database Schema Migration Strategy

**Date**: 2025-12-12

**Status**: Proposed

**Supersedes**: [ADR-013](./0013-database-schema-migration-strategy.md)

## Context

The `README.md` indicates that the database schema is managed by manually running a large `schema.sql.txt` file. This approach is highly error-prone, makes tracking changes difficult, and is not feasible for updating a live production database without downtime or data loss.

## Decision

We will adopt a dedicated database migration tool, such as **`node-pg-migrate`**. All future schema changes (e.g., `ALTER TABLE`, `CREATE INDEX`) will be written as individual, version-controlled, timestamped migration scripts that can be applied and rolled back automatically.

## Consequences

**Positive**: Provides a safe, repeatable, and reversible way to evolve the database schema. Improves team collaboration on database changes. Reduces the risk of data loss or downtime during deployments.
**Negative**: Requires an initial setup and learning curve for the chosen migration tool. All future schema changes must adhere to the migration workflow.