Class SequentialAgent

java.lang.Object
com.google.adk.agents.BaseAgent
com.google.adk.agents.SequentialAgent
public class SequentialAgent extends BaseAgent
An agent that runs its sub-agents sequentially.

Composition with LlmAgents: a SequentialAgent does not transfer control back to a parent LlmAgent. Use it as the root or transferred-to agent and place any follow-up LlmAgent as the next sibling. Upstream publishes via outputKey and downstream reads via {key} placeholders in its instruction: 

var draft =
    LlmAgent.builder()
        .name("draft")
        .model("gemini-flash-latest")
        .instruction("Draft a summary.")
        .outputKey("draft")
        .build();
var reviewer =
    LlmAgent.builder()
        .name("reviewer")
        .model("gemini-flash-latest")
        .instruction("Polish the draft: {draft}")
        .build();
var pipeline =
    SequentialAgent.builder().name("pipeline").subAgents(draft, reviewer).build();