Failure Paths

In a happy path flow, A -> B -> C. In reality, nodes crash.

The Exception Edge

Wrap your node logic in try/except. If specific error occurs, return a flag key in the state: {"error": "Timeout"}. The Conditional Edge sees this key and routes to ErrorHandlingNode instead of SuccessNode.

This keeps the crash logic explicit in the graph, rather than hidden in a catch block deep in the code.