LayerFS is an open-source Rust filesystem built for AI coding agents.
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Every agent mounts a complete, writable Workspace over shared committed history without copying the base, commits its changes as deduplicated checkpoints, and can branch, rewind or merge, so many agents can work on one project in parallel.
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Writable FUSE Workspaces over shared committed history with no base copy
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Branches, Commits and Layers with deduplicated, chunked content storage
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Recursive forking from any Commit and conflict refusal with optional .lww rules
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Single SQLite-file Store shared by daemons and the JavaScript SDK, no database server
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LayerFS x DSH plugin with Work and History tabs for DeepSeek Harness agents
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Published 1.0.0 benchmarks including fs-bench, pjdfstest, fsx and fsstress
Open Source
Free and open source under the MIT License, released as source.
Best for
Agent builders and DeepSeek Harness users who want many parallel agents to share one project history with cheap, disposable, versioned workspaces.
Not ideal for
Storing data you cannot rebuild; the Store currently has no crash or power-loss durability, and the main supported integration today is DeepSeek Harness.
A promising, benchmark-backed storage layer for multi-agent coding that makes branching and rewinding agent workspaces cheap, though still early in durability and integrations.
LayerFS 1.0.0, the first official release after the 0.1.x Developer Previews, was published on October 21, 2026 and reached the Hacker News front page the same day.
As of
Is LayerFS free?+
Yes - LayerFS is Open Source. Free and open source under the MIT License, released as source.
Is LayerFS open source?+
Yes - LayerFS is open source. Free and open source under the MIT License, released as source.
Who is LayerFS best for?+
Agent builders and DeepSeek Harness users who want many parallel agents to share one project history with cheap, disposable, versioned workspaces.
Who is LayerFS not ideal for?+
Storing data you cannot rebuild; the Store currently has no crash or power-loss durability, and the main supported integration today is DeepSeek Harness.
What are the best LayerFS alternatives?+
The closest LayerFS alternatives on ai.dosa.dev are Pieces for Developers, agenttrace, Vibe Kanban - all listed under Developer Productivity & Workflow.
Who makes LayerFS?+
LayerFS is developed by Ephemeral AI Lab. It is listed in the Developer Productivity & Workflow category on ai.dosa.dev.
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