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tech 10 June 2026

Apache Burr: Build Reliable AI Agents and Applications

Apache Burr simplifies AI application development, from chatbots to complex multi-agent systems, using a pure and powerful Python API.

Article inspired by the original source
Apache Burr: Build reliable AI agents and applications ↗ burr.apache.org

Introduction

In the fast-paced world of artificial intelligence, the need to build reliable and observable applications is more crucial than ever. Apache Burr, currently in incubation, addresses this need with a simple yet powerful solution. But what sets Burr apart from other frameworks on the market? Let's dive into its features and discover how it can transform AI application development.

A Simple and Powerful Python API

With Burr, forget about complex DSLs and YAML files. Everything operates with Python functions and decorators. For instance, to create a chatbot, simply define actions and transitions:

```python from burr.core import action, State, ApplicationBuilder

@action(reads=["messages"], writes=["messages"]) def chat(state: State, llm_client) -> State: response = llm_client.chat(state["messages"]) return state.update(messages=[*state["messages"], response])

app = ( ApplicationBuilder() .with_actions(chat) .with_transitions(("chat", "chat")) .with_state(messages=[]) .with_tracker("local") .build() ) app.run(halt_after=["chat"], inputs={"llm_client": client}) ```

This simplicity allows great flexibility, whether you're building a simple chatbot or a complex multi-agent system.

Built-in Observability

One of Burr's strengths lies in its real-time monitoring UI. You can track, debug, and trace every step of your application. Seeing state changes as they happen is crucial for deploying reliable AI applications.

State Management and Persistence

Burr automatically handles state persistence, whether on disk, in a database, or via custom backends. This means you can resume your applications exactly where they left off, a must-have for critical applications.

Human-in-the-Loop

For workflows requiring human intervention, Burr allows pausing execution for validation or feedback. This is ideal for interactive agents or approval workflows.

Branching and Parallelism

Burr enables actions to run in parallel and create complex DAGs. This facilitates modular application design by composing sub-applications.

Integration with Your Ecosystem

No need to reinvent the wheel. Burr integrates with tools and frameworks you already use, like OpenAI, LangChain, or FastAPI. This ensures you're not locked into a specific ecosystem.

Confidence and Testability

With the ability to replay past runs and unit test individual actions, Burr allows you to trust your AI systems. Validating state transitions is crucial to ensure your application functions as expected.

Conclusion

Apache Burr offers a modern and flexible approach to building reliable AI applications. Its ability to integrate with existing tools and offer complete observability makes it a formidable choice for developers and businesses alike. Ready to discover how Burr can transform your project? Let's discuss your project in 15 minutes.

Apache Burr AI agents Python API Observability State Management
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