BackendProtocol | deepagents | LangChain Reference

Protocol for pluggable memory backends (single, unified).

Backends can store files in different locations (state, filesystem, database, etc.) and provide a uniform interface for file operations.

All file data is represented as dicts with the following structure::

{
    "content": str,  # Text content (utf-8) or base64-encoded binary
    "encoding": str,  # "utf-8" for text, "base64" for binary data
    "created_at": str,  # ISO format timestamp
    "modified_at": str,  # ISO format timestamp
}