Decoder. plain-English AI glossary

Planning

● Core

The model sketching the steps to reach a goal before it starts doing them.

Think of it like

Writing a to-do list for a road trip — book the car, map the route, pack — instead of just driving off.

Example

Told to “launch a newsletter,” the agent first lays out: pick a platform, draft a template, import contacts, schedule the first send.

How it actually works

Planning separates deciding what to do from doing it, which helps on long tasks where a single greedy step would wander off. Plans can be made once up front or revised as reality intrudes. The honest catch: models are decent at plausible-sounding plans and worse at plans that survive contact with a messy environment, which is why replanning matters.

For product teams

It is what lets an agent tackle a big ask instead of only bite-sized prompts.

For engineers

Generating an ordered sequence of subgoals or actions before execution, optionally revised as observations arrive.

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