Modal Labs releases Overeasy, a branching filesystem for agents and RL

andersonbcdefg · x · 2026-08-08

Modal Labs has released Overeasy, a filesystem state manager for coding agents and RL rollouts. It uses an append-only log on S3 for durability, allowing pause-resume of agent/RL filesystem state across hosts, reverting to previous states, and cheaply branching into parallel states. The filesystem is served as a FUSE mount overlay over a base directory with copy-on-write isolation. Sessions can be paused, resumed, branched, and reverted via CLI. It is experimental and subject to change.

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