Gnomon. Git for Postgres data, built for agents

Gnomon is a Git-like version control system for PostgreSQL data designed for AI agents, allowing users to create isolated database branches from a single connection string without copying data. The tool runs as a PostgreSQL extension and enables users to track changes, review diffs, merge branches, and undo changes similar to traditional Git workflows. It supports schema migrations on branches and works with PostgreSQL 15-18 on both self-hosted and managed databases.