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The author details building Homescale, a tool that creates writable database instances and point-in-time branches from immutable snapshots without full data copies, using a Docker-like image and container model for databases.
Ardent is a Y Combinator-backed tool that clones any PostgreSQL database in under 6 seconds at TB scale, enabling coding agents and developers to test code on production-like clones without risking downtime. The tool is already being used by companies like Supermemory and Surface Labs.