Token Budgeting Per Node

Running an agent loop is like checking a bank account balance. It drains fast.

The Strategy

Don't send the Full State to every node.

• Planner Node: Needs full history messages. (Expensive).
• Tool Node: Only needs the tool_call object. (Cheap).
• Refiner Node: Needs messages + tool_output. (Expensive).

By creating Sub-States, you can invoke nodes with only the data they need, saving tokens on input and reducing latency.