Avoiding Infinite Loops

1. The Hard Limit (Recursion Limit)

LangGraph has a built-in recursion_limit config. Used as a last line of defense.

# Will raise Error after 25 steps
graph.invoke(inputs, {"recursion_limit": 25})

2. The Simplification Strategy

If an agent fails 3 times, you probably shouldn't try a 4th time with the same strategy. Design your loop to degrade complexity.

• Tries 1-3: "Use complex Python tool."
• Tries 4-5: "Use simple Calculator tool."
• Tries 6: "Ask human for help."

The graph structure defines these shifting strategies based on the loop count.