Modal launches Directory Snapshots in public beta for Sandbox project state

Modal launched Directory Snapshots in public beta, letting users snapshot a specific directory inside a running Sandbox and mount it into another Sandbox independently of the base image and the rest of the filesystem. The feature targets coding agents and vibe coding platforms that need to preserve project state across sandbox restarts, and Modal says it enables separating system dependencies from application code, pre-warming sandbox pools, and faster pre-loading of key files. Directory Snapshots persist for 30 days after last use and mount instantly, with contents prioritized for pre-loading on Modal's lazy-loading container filesystem.