Sequential pattern: three nodes A, B, C connected in a line. Annotated start here. The simplest multi-agent communication pattern.
Parallel pattern: a starting node fans out to two parallel nodes that work simultaneously, then merges back into a final node.
Manager and specialists pattern: a manager at the top coordinates three specialists below. Annotated common in production.
Deeper hierarchy pattern: a manager at the top, two sub-managers in the middle, and four specialists at the bottom.
All-to-all pattern: four nodes all connected to each other in a mesh. Annotated rare in production.
Start with the simplest coordination pattern that works. Add complexity only when the task demands it.