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AlbumenJAlbumenJ
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feat(examples): add HITL chat example with MCP tools and tool confirmation (agentscope-ai#440)
1 parent 0b2c643 commit fd054eb

20 files changed

Lines changed: 2722 additions & 27 deletions

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‎agentscope-core/src/main/java/io/agentscope/core/ReActAgent.java‎

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@@ -342,6 +342,16 @@ private Mono<Msg> reasoning(int iter, boolean ignoreMaxIters) {
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}
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})
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.then(Mono.defer(() -> Mono.justOrEmpty(context.buildFinalMessage())))
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.onErrorResume(
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InterruptedException.class,
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error -> {
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// Save accumulated message before propagating interrupt
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Msg msg = context.buildFinalMessage();
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if (msg != null) {
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memory.addMessage(msg);
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}
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return Mono.error(error);
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})
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.flatMap(this::notifyPostReasoning)
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.flatMap(
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event -> {

‎agentscope-core/src/main/java/io/agentscope/core/formatter/dashscope/DashScopeResponseParser.java‎

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@@ -29,11 +29,9 @@
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import io.agentscope.core.message.ToolUseBlock;
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import io.agentscope.core.model.ChatResponse;
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import io.agentscope.core.model.ChatUsage;
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import io.agentscope.core.util.JsonUtils;
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import java.time.Duration;
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import java.time.Instant;
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import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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import org.slf4j.Logger;
@@ -145,24 +143,6 @@ protected void addToolCallsFromMessage(DashScopeMessage message, List<ContentBlo
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String name = function.getName();
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String argsJson = function.getArguments();
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Map<String, Object> argsMap = new HashMap<>();
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String rawContent = null;
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if (argsJson != null && !argsJson.isEmpty()) {
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rawContent = argsJson;
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try {
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@SuppressWarnings("unchecked")
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Map<String, Object> parsed =
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JsonUtils.getJsonCodec().fromJson(argsJson, Map.class);
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if (parsed != null) {
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argsMap.putAll(parsed);
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}
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} catch (Exception ignored) {
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// Keep raw content for later aggregation when JSON parsing fails
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// This handles streaming tool calls where arguments are fragmented
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}
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}
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// For DashScope streaming tool calls:
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// - First chunk: has name, id, and partial arguments
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// - Subsequent chunks: only have argument fragments, no name/id
@@ -174,19 +154,19 @@ protected void addToolCallsFromMessage(DashScopeMessage message, List<ContentBlo
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ToolUseBlock.builder()
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.id(callId)
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.name(name)
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.input(argsMap)
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.content(rawContent)
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.input(Map.of())
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.content(argsJson)
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.build());
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} else if (rawContent != null) {
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} else if (argsJson != null) {
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// Subsequent chunks with only argument fragments
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String callId =
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id != null ? id : ("fragment_" + System.currentTimeMillis() + "_" + idx);
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blocks.add(
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ToolUseBlock.builder()
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.id(callId)
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.name(FRAGMENT_PLACEHOLDER)
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.input(argsMap)
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.content(rawContent)
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.input(Map.of())
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.content(argsJson)
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.build());
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}
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idx++;

‎agentscope-core/src/test/java/io/agentscope/core/formatter/dashscope/DashScopeResponseParserTest.java‎

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@@ -159,7 +159,7 @@ void testParseResponseWithToolCalls() {
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ToolUseBlock toolUse = (ToolUseBlock) chatResponse.getContent().get(1);
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assertEquals("call_123", toolUse.getId());
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assertEquals("get_weather", toolUse.getName());
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assertEquals("Beijing", toolUse.getInput().get("location"));
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assertTrue(toolUse.getInput().isEmpty());
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}
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@Test

‎agentscope-examples/hitl-chat/pom.xml‎

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@@ -0,0 +1,86 @@
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<?xml version="1.0" encoding="UTF-8"?>
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<!--
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~ Copyright 2024-2026 the original author or authors.
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~
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~ Licensed under the Apache License, Version 2.0 (the "License");
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~ you may not use this file except in compliance with the License.
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~ You may obtain a copy of the License at
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~
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~ http://www.apache.org/licenses/LICENSE-2.0
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~
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~ Unless required by applicable law or agreed to in writing, software
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~ distributed under the License is distributed on an "AS IS" BASIS,
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~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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~ See the License for the specific language governing permissions and
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~ limitations under the License.
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-->
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<project xmlns="http://maven.apache.org/POM/4.0.0"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<parent>
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<groupId>io.agentscope</groupId>
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<artifactId>agentscope-examples</artifactId>
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<version>${revision}</version>
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<relativePath>../pom.xml</relativePath>
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</parent>
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<groupId>io.agentscope.examples</groupId>
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<artifactId>hitl-chat</artifactId>
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<packaging>jar</packaging>
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<name>AgentScope Java - Examples - HITL Chat</name>
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<description>Human-in-the-Loop chat example with MCP tools, interruption and tool confirmation</description>
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<properties>
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<maven.compiler.source>17</maven.compiler.source>
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<maven.compiler.target>17</maven.compiler.target>
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<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
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<maven.deploy.skip>true</maven.deploy.skip>
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</properties>
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<dependencyManagement>
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<dependencies>
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<!-- Spring Boot BOM -->
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-dependencies</artifactId>
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<version>${spring.boot.version}</version>
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<type>pom</type>
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<scope>import</scope>
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</dependency>
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</dependencies>
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</dependencyManagement>
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<dependencies>
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<dependency>
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<groupId>io.agentscope</groupId>
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<artifactId>agentscope-core</artifactId>
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</dependency>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-webflux</artifactId>
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</dependency>
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</dependencies>
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<build>
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<plugins>
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<plugin>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-maven-plugin</artifactId>
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<version>${spring.boot.version}</version>
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<executions>
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<execution>
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<goals>
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<goal>repackage</goal>
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</goals>
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</execution>
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</executions>
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</plugin>
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</plugins>
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</build>
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</project>

‎agentscope-examples/hitl-chat/src/main/java/io/agentscope/examples/hitlchat/HitlChatApplication.java‎

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/*
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* Copyright 2024-2026 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13+
* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package io.agentscope.examples.hitlchat;
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import org.springframework.boot.SpringApplication;
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import org.springframework.boot.autoconfigure.SpringBootApplication;
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/**
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* HITL Chat Application - Human-in-the-Loop chat example.
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*
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* <p>This application demonstrates:
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* <ul>
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* <li>Dynamic MCP tool configuration</li>
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* <li>Agent interruption during conversation</li>
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* <li>Dangerous tool confirmation before execution</li>
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* <li>Built-in tools (time, file, random number)</li>
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* </ul>
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*
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* <p><b>Usage:</b>
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* <ol>
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* <li>Set the DASHSCOPE_API_KEY environment variable</li>
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* <li>Run this application</li>
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* <li>Open http://localhost:8080 in a browser</li>
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* </ol>
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*/
39+
@SpringBootApplication
40+
public class HitlChatApplication {
41+
42+
public static void main(String[] args) {
43+
SpringApplication.run(HitlChatApplication.class, args);
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printStartupInfo();
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}
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47+
private static void printStartupInfo() {
48+
System.out.println("\n=== HITL Chat Application Started ===");
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System.out.println("Open: http://localhost:8080");
50+
System.out.println("\nFeatures:");
51+
System.out.println(" - Dynamic MCP tool configuration");
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System.out.println(" - Agent interruption support");
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System.out.println(" - Dangerous tool confirmation");
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System.out.println(" - Built-in tools: get_time, list_files, random_number");
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System.out.println("\nPress Ctrl+C to stop.");
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}
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}

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