Build, orchestrate and scale agents impossibly fast

Impossibly

Impossibly is an agentic orchestration framework for rapidly building agentic architectures in Python. It accelerates agentic development, empowering developers to craft architectures that enable LLMs to excel in higher-order tasks like idea generation and critical thinking.

This library is designed to be used as a backend for AI apps and automations, providing support for all major LLM providers and locally-hosted model endpoints.

Getting Started

Installation

Install the base package:

pip install impossibly

Or install with specific integrations:

# Minimal installations with specific providers
pip install "impossibly[openai]"    # Only OpenAI support
pip install "impossibly[anthropic]" # Only Anthropic support
pip install "impossibly[all]"       # All LLM integrations

# For testing and development
pip install "impossibly[test]"      # All LLM integrations + testing tools
pip install "impossibly[dev]"       # All LLM integrations + testing + dev tools

Imports

Import the components you need:

from impossibly import Agent, Graph, START, END

Setting Up Environment Variables

1. Copy the .env.template file to a new file named .env:

   cp .env.template .env
   

2. Fill in your API keys and configurations in the .env file:

   OPENAI_API_KEY=your_actual_api_key_here
   ANTHROPIC_API_KEY=your_anthropic_api_key_here
   

3. The library will automatically load these variables when needed. At minimum, you'll need the API key for your preferred LLM provider.

Initalize Clients for LLM APIs

Done in the format standard to your API.

Create Agents

Initalize the agents you'd like to call with a simple schema:

agent = Agent(
          client=client, 
          model="gpt-4o", 
          name="Agent", 
          system_prompt="You are a friendly assistant.",
          description="This agent is an example agent."
    )

Define how agents are executed with a Graph

Graphs connect agents together using nodes and edges, routing the execution flow and all needed information through the graph. Each node represents an agent and each edge represents a conditional under which that agent is called. This conditional can be defined in natural language for each agent, within its system_prompt.

In the case of multiple edges branching from one node, agents can understand their routing options using the description field of connecting nodes.

Every graph accepts user input at the START and returns a response to the user at the END.

With this basic understanding, a graph can be created in just a few lines.

graph = Graph()

graph.add_node(agent)
graph.add_node(summarizer_agent)

graph.add_edge(START, agent)
graph.add_edge(agent, summarizer_agent)
graph.add_edge(summarizer_agent, END)

Run your Graph

You're done! Prompt your agentic architecture.

graph.invoke("Hello there!")

Development

Running Tests

To run the tests, first install the package with test dependencies:

# Install with test dependencies
pip install -e ".[test]"

Then run the tests using the CLI command that gets installed with the package:

# Run all tests
impossibly run

# Run just feature tests
impossibly run --path features/

# Run tests in Docker
impossibly run --docker

# Get help
impossibly run --help

See tests/README.md for more details on the testing framework and available options.

Local Development and Running Examples

If you want to develop locally and test the examples, follow these steps:

Building the Package Locally

1. Clone the repository:

   git clone https://github.com/jacksongrove/impossibly.git
   cd impossibly
   

2. Create and activate a virtual environment (optional but recommended):

   python -m venv .venv
   source .venv/bin/activate  # On Windows: .venv\Scripts\activate
   

3. Install development dependencies:

   pip install -e ".[dev]"
   

4. Build the package locally:

   python -m build
   

   This will create distributions in the dist/ directory.

Installing the Local Build to Run Examples

There are two approaches to use your local build:

Option 1: Install in Development Mode (Recommended)

This allows changes to the source code to be immediately reflected without reinstalling:

pip install -e .

Option 2: Install the Built Wheel

If you want to test the exact distribution that would be uploaded to PyPI:

pip install dist/impossibly-0.1.0-py3-none-any.whl

Running Examples

Once you've installed the package using either method, you can run the examples:

# Set up your environment variables first
cp .env.template .env
# Edit .env to add your API keys

# Run an example
python examples/image_agent/image_agent.py

# Or try another example
python examples/web_search_agent/web_search_agent.py

Make sure the required dependencies for each example are installed and the necessary API keys are in your .env file.