librefang-sdk 2026.4.15b21

Official Python client and SDK for the LibreFang Agent OS

LibreFang Python SDK

Official Python client and SDK for the LibreFang Agent OS.

Installation

pip install librefang

Two Packages

This package provides two different interfaces:

1. REST API Client (librefang.client)

Control LibreFang remotely via its REST API.

from librefang import Client

client = Client("http://localhost:4545")

# Create an agent
agent = client.agents.create(template="assistant")
print(f"Agent created: {agent['id']}")

# Send a message
reply = client.agents.message(agent["id"], "Hello!")
print(reply)

# Stream a response
for event in client.agents.stream(agent["id"], "Tell me a story"):
    if event.get("type") == "text_delta":
        print(event["delta"], end="", flush=True)

2. Agent SDK (librefang.sdk)

Write Python agents that run inside LibreFang.

from librefang import Agent

agent = Agent()

@agent.on_message
def handle(message: str, context: dict) -> str:
    return f"You said: {message}"

agent.run()

Or use the simple input/output functions:

from librefang import read_input, respond

data = read_input()
result = f"Echo: {data['message']}"
respond(result)

Examples

See the examples/ directory for more examples:

Client Examples

• client_basic.py - Basic REST API usage
• client_streaming.py - Streaming responses

SDK Examples

• echo_agent.py - Simple echo agent

Requirements

• Python 3.8+

License

MIT