Fan-Out and Fan-In Patterns

Fan-Out (Map)

The Fan-Out node generates multiple sub-tasks.

• Input: "Research physics, chemistry, and biology."
• Action: Create 3 separate state branches.
• Routing: Send each branch to a ResearcherNode.

Fan-In (Reduce)

The Fan-In node waits. It is a "Synchronization Point". It does not execute until all upstream edges have delivered their result.

• Input: [Result Physics, Result Chemistry, Result Biology]
• Action: Summarize into one report.

graph TD
    Manager --> WorkerA
    Manager --> WorkerB
    Manager --> WorkerC
    WorkerA --> Supervisor
    WorkerB --> Supervisor
    WorkerC --> Supervisor