<div align="center">
  <img src="docs/assets/blast_icon_only.sketchpad.png" width="200" height="200" alt="BLAST Logo">
</div>

<p align="center" style="font-size: 24px">The agent <i>compiler</i> framework</p>

<div align="center">

[![Documentation](https://img.shields.io/badge/Docs-FFE067)](https://docs.a1project.org)
[![Discord](https://img.shields.io/badge/Discord-FFE067)](https://discord.gg/NqrkJwYYh4)
[![Twitter Follow](https://img.shields.io/twitter/follow/realcalebwin?style=social)](https://x.com/realcalebwin)

</div>

A1 is a new kind of agent framework. It takes an `Agent` (a set of tools and a description) and compiles either AOT (ahead-of-time) into a `Tool` or JIT (just-in-time) for immediate execution optimized for each unique agent input.

```bash
uv pip install a1-compiler
# or
pip install a1-compiler
```

## 🏎️ Why use an agent compiler?

An agent compiler is a direct replacement for agent frameworks such as Langchain or aisdk, where you define an `Agent` and run. The diference is:

1. **Safety** - Minimizes exposure of sensitive data to an LLM.
2. **Speed** - Up to 10x faster code generation.
3. **Determinism** - Code is optimized for minimal non-deterministic behavior (e.g. LLM calls replaced with code where possible).
4. **Flexibility** - Skills and Tools from any existing OpenAPI, MCP server, databases, fsspec paths, Python functions

Agent compilers emerged from frustration with the MCP protocol and SOTA agent frameworks where every agent runs a static while loop program. Slow, unsafe, and highly nondeterministic. 

An agent compiler can perform the same while loop (just set `Verify=IsLoop()`) but has the freedom to explore superoptimal execution plans, while subject to engineered constraints (e.g. type-safety).

Ultimately the goal is "determinism-maxing": specifying as much of your task as fully deterministic code (100% accuracy) and gradually reducing non-deterministic LLM calls to the bare minimum.

## 🚀 How to get started?

```python
from a1 import Agent, tool, LLM
from pydantic import BaseModel

# Define a simple tool
@tool(name="add", description="Add two numbers")
async def add(a: int, b: int) -> int:
    return a + b

# Define input/output schemas
class MathInput(BaseModel):
    problem: str

class MathOutput(BaseModel):
    answer: int

# Create an agent with tools and LLM
agent = Agent(
    name="math_agent",
    description="Solves simple math problems",
    input_schema=MathInput, # like DSPy modules, A1 agent behavior is specified via schemas. The difference is that in A1, an engineer may implement a Verify function to enforce agent-specific constraints such as order of tool calling.
    output_schema=MathOutput,
    tools=[add, LLM(model="gpt-4.1")],  # in A1, LLMs are tools!
)

async def main():
    # Compile ahead-of-time
    compiled = await agent.aot()
    result = await compiled.execute(problem="What is 2 + 2?")
    print(f"AOT result: {result}")

    # Or execute just-in-time
    result = await agent.jit(problem="What is 5 + 3?")
    print(f"JIT result: {result}")

import asyncio
asyncio.run(main())
```

See the `tests/` directory for extensive examples of everything A1 can do. Docs coming soon to [docs.a1project.org](https://docs.a1project.org)

## ✨ Features

* **Import** any Langchain agent
* **Observability** via OpenTelemetry
* **Tools** instantiated from MCP or OpenAPI
* **RAG** instantiated given any SQL database or fsspec path (e.g. `s3://my-place/here`, `gs://...`, or local filesystem)
* **Skills** defined manually or by crawling online docs
* **Context engineering** via a simple API that lets compiled code manage multi-agent behavior
* **Zero lock-in** use any LLM, any secure code execution cloud
* Only gets better as researchers develop increasingly powerful methods to `Generate`, `Cost` estimate, and `Verify` agent code

## 🙋 FAQ

#### Should I use A1 or Langchain/aisdk/etc?
Prefer A1 if your task is latency-critical, works with untrusted data, or may need to run code.

#### Is A1 production-ready?
Yes in terms of API stability. The caveat is that A1 is new.

#### Can we get enterprise support?
Please don't hesitate to reach out (calebwin@stanford.edu)

## 🤝 Contributing

Awesome! See our [Contributing Guide](/CONTRIBUTING.md) for details.

## 📄 MIT License

As it should be!

## 📜 Citation

Paper coming soon! Reach out if you'd like to contribute.