Apache Incubating Project

Apache Burr (Incubating) makes it easy to develop applications that make decisions, from simple chatbots to complex multi-agent systems. Pure Python, no magic.

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Simple, powerful Python API

Build anything from chatbots to multi-agent systems with a clean, composable interface.

Everything you need to build AI applications

Burr provides the building blocks for reliable, observable, and testable AI-powered applications.

Simple Python API

Define your application as a set of actions and transitions. No DSL, no YAML — just Python functions and decorators.

Built-in Observability

The Burr UI lets you monitor, debug, and trace every step of your application in real time. See state changes as they happen.

Persistence & State Management

Automatically persist state to disk, databases, or custom backends. Resume applications from where they left off.

Human-in-the-Loop

Pause execution and wait for human input at any step.…