Backends

Reference docs

This page contains reference documentation for Backends. See the docs for conceptual guides, tutorials, and examples.

Backends provide a unified interface for file operations across different storage types. All backends implement the BackendProtocol, enabling agents to work with files regardless of where they're stored.

• BackendProtocol

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  Abstract protocol defining the interface all backends must implement.

  Reference

• StateBackend

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  In-memory backend using LangGraph state. Ephemeral, thread-local storage.

  Reference

• StoreBackend

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  Persistent backend using LangGraph's BaseStore. Cross-thread storage.

  Reference

• FilesystemBackend

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  Real filesystem access with optional virtual mode.

  Reference

• BaseSandbox

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  Base class for backends supporting shell command execution.

  Reference

• CompositeBackend

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  Router that delegates operations to different backends by path prefix.

  Reference