Decoder. plain-English AI glossary

Task Decomposition

● Core

Splitting one big, vague job into smaller concrete pieces an agent can actually tackle.

Think of it like

Turning “plan the wedding” into a checklist — venue, invites, catering — because nobody can do “plan the wedding” in one move.

Example

“Migrate the database” becomes: back up the data, create the new schema, write the transfer script, verify counts, cut over.

How it actually works

Decomposition is the first move in planning: big goals are too abstract to act on, so the agent breaks them into subtasks small enough to have a clear next step. Good decomposition makes the rest easy and bad decomposition dooms it — miss a step and the whole chain is off. It is one of the things models do decently but not reliably, especially when the pieces have hidden dependencies.

For product teams

Whether an agent can handle a big ask usually comes down to how well it carves it up.

For engineers

Breaking a high-level goal into an ordered set of tractable subtasks, respecting dependencies.

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