AI Glossary
Planner
Also called planning step
What does “Planner” mean?
Planner: Component, or a stage of an agent's own reasoning, that breaks a goal into an ordered list of steps before acting. Good plans get revised as results come in rather than followed blindly.

What is an example of “Planner”?
Given "move our blog to a new host," a planner might list backup, export, import, DNS change and verification as separate steps.