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Go

/*
* Copyright 2025 CloudWeGo Authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package main
import (
"context"
"fmt"
"log"
"github.com/cloudwego/eino-examples/adk/common/trace"
"github.com/cloudwego/eino/adk"
"github.com/cloudwego/eino-examples/adk/common/prints"
"github.com/cloudwego/eino-examples/adk/intro/workflow/sequential/subagents"
)
func main() {
ctx := context.Background()
traceCloseFn, startSpanFn := trace.AppendCozeLoopCallbackIfConfigured(ctx)
defer traceCloseFn(ctx)
a, err := adk.NewSequentialAgent(ctx, &adk.SequentialAgentConfig{
Name: "ResearchAgent",
Description: "A sequential workflow for planning and writing a research report.",
SubAgents: []adk.Agent{subagents.NewPlanAgent(), subagents.NewWriterAgent()},
})
if err != nil {
log.Fatal(err)
}
query := "The history of Large Language Models"
ctx, endSpanFn := startSpanFn(ctx, "layered-supervisor", query)
runner := adk.NewRunner(ctx, adk.RunnerConfig{
EnableStreaming: true, // you can disable streaming here
Agent: a,
})
var lastMessage adk.Message
iter := runner.Query(ctx, query)
for {
event, ok := iter.Next()
if !ok {
break
}
if event.Err != nil {
fmt.Printf("Error: %v\n", event.Err)
break
}
prints.Event(event)
if event.Output != nil {
if msg, _, getErr := adk.GetMessage(event); getErr == nil {
lastMessage = msg
}
}
}
endSpanFn(ctx, lastMessage)
}