ferrant 0.1.13

Fast, lightweight AI agents powered by a Rust core

ferrant Python wrapper

This directory is an optional, thin Python binding around the Rust ferrant crate. The agent loop, providers, MCP, graph scheduler, persistence, streaming, and retrieval remain implemented in Rust. Installing this package does not change the Rust crate or its examples.

pip install ferrant

Then import it directly:

import asyncio
import os
from ferrant import Agent

async def main():
    agent = Agent.openai("gpt-5-nano", os.environ["OPENAI_API_KEY"])
    print(await agent.run("Explain Rust ownership in one paragraph."))

asyncio.run(main())

For local wrapper development, use maturin develop --release from this directory. End users do not need Maturin or a Rust toolchain when installing a prebuilt wheel.

pip install ferrant also installs the ferrant command. Run ferrant init to create a function-based Python agent, ferrant run to host it locally, and ferrant deploy to start a new container from ferrant-runner:latest. See the repository's docs/deployment.md for the deployment contract.

The wheel uses PyO3's stable ABI for Python 3.9+. Rust futures are exposed as normal asyncio awaitables. Python custom-tool and graph-node callbacks are synchronous by design; keep expensive execution in Rust tools, MCP servers, or model calls.

See examples/ for Python counterparts of every top-level Rust example and matched advanced workflow examples.

Focused Python examples

Run these from the python-wrapper/ directory after installing the package:

python examples/streaming.py
python examples/memory.py
python examples/rag.py
DOCUMENT_PATH=invoice.pdf python examples/document_extraction.py
DOCUMENT_PATH=invoice.pdf python examples/rag_document_extraction.py

• streaming.py prints content_delta events as the model generates them.
• memory.py stores a session in .ferrant/sessions and recalls a prior turn.
• rag.py persists a local hybrid vector index, retrieves relevant documents, and provides the matches as grounded agent context.
• document_extraction.py base64-encodes a local PDF and asks OpenAI to extract invoice fields. Set DOCUMENT_PATH to a PDF and OPENAI_API_KEY before running it.
• rag_document_extraction.py transcribes a local PDF with OpenAI, indexes the text locally, retrieves invoice-relevant passages, and returns schema-validated extraction results. Set DOCUMENT_PATH to a PDF.

The exposed surface covers OpenAI-compatible and Anthropic agents, Python tools, MCP-discovered tools, coordinator teams, multimodal input/output, streaming callbacks, schema-validated output, persistent retrieval, and durable workflow graphs with routes, parallel joins, retry/timeout policies, interrupts, resume, and recovery.