Deepagents Implementation

Deep Agents Implementation

Core Concepts

Deep Agents provides a batteries-included agent harness built on LangGraph:

• create_deep_agent: Factory function that creates a configured agent
• Middleware: Injected capabilities (filesystem, todos, subagents, summarization)
• Backends: Pluggable file storage (state, filesystem, store, composite)
• Subagents: Isolated task execution via the task tool

The agent returned is a compiled LangGraph StateGraph, compatible with streaming, checkpointing, and LangGraph Studio.

Essential Imports

# Core
from deepagents import create_deep_agent

# Subagents
from deepagents import CompiledSubAgent

# Backends
from deepagents.backends import (
    StateBackend,       # Ephemeral (default)
    FilesystemBackend,  # Real disk
    StoreBackend,       # Persistent cross-thread
    CompositeBackend,   # Route paths to backends
)

# LangGraph (for checkpointing, store, streaming)
from langgraph.checkpoint.memory import InMemorySaver
from langgraph.checkpoint.postgres import PostgresSaver
from langgraph.store.memory import InMemoryStore