wip: Add page tools to AI chatter

pom.xml

@@ -629,7 +629,7 @@
 			</dependency>
 			<dependency>
 				<groupId>dev.langchain4j</groupId>
-				<artifactId>langchain4j-core</artifactId>
+				<artifactId>langchain4j</artifactId>
 				<version>${langchain4j.version}</version>
 			</dependency>
 			<dependency>

server-core/pom.xml

@@ -385,7 +385,7 @@
 		</dependency>
 		<dependency>
 			<groupId>dev.langchain4j</groupId>
-			<artifactId>langchain4j-core</artifactId>
+			<artifactId>langchain4j</artifactId>
 		</dependency>
 	</dependencies>
 	<properties>

server-core/src/main/java/io/onedev/server/ai/IssueHelper.java

@@ -0,0 +1,90 @@
+package io.onedev.server.ai;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Comparator;
+import java.util.HashMap;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+
+import com.fasterxml.jackson.core.type.TypeReference;
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+import io.onedev.server.OneDev;
+import io.onedev.server.model.Issue;
+import io.onedev.server.model.IssueComment;
+import io.onedev.server.model.Project;
+import io.onedev.server.web.UrlService;
+
+public class IssueHelper {
+    
+    private static ObjectMapper getObjectMapper() {
+        return OneDev.getInstance(ObjectMapper.class);
+    }
+
+    private static UrlService getUrlService() {
+        return OneDev.getInstance(UrlService.class);
+    }
+
+    public static Map<String, Object> getSummary(Project currentProject, Issue issue) {        
+        var typeReference = new TypeReference<LinkedHashMap<String, Object>>() {};
+        var summary = getObjectMapper().convertValue(issue, typeReference);
+        summary.remove("id");
+        summary.remove("stateOrdinal");
+        summary.remove("uuid");
+        summary.remove("messageId");
+        summary.remove("pinDate");
+        summary.remove("boardPosition");
+        summary.remove("numberScopeId");
+        summary.put("reference", issue.getReference().toString(currentProject));
+        summary.remove("submitterId");
+        summary.put("submitter", issue.getSubmitter().getName());
+        summary.put("Project", issue.getProject().getPath());
+        summary.remove("lastActivity");
+        for (var it = summary.entrySet().iterator(); it.hasNext();) {
+            var entry = it.next();
+            if (entry.getKey().endsWith("Count"))
+                it.remove();
+        }
+        return summary;
+    }
+
+    public static List<Map<String, Object>> getComments(Issue issue) {
+        var comments = new ArrayList<Map<String, Object>>();
+        issue.getComments().stream().sorted(Comparator.comparing(IssueComment::getId)).forEach(comment -> {
+            var commentMap = new HashMap<String, Object>();
+            commentMap.put("user", comment.getUser().getName());
+            commentMap.put("date", comment.getDate());
+            commentMap.put("content", comment.getContent());
+            comments.add(commentMap);
+        });
+        return comments;
+    }
+
+    public static Map<String, Object> getDetail(Project currentProject, Issue issue) {
+        var detail = getSummary(currentProject, issue);
+        for (var entry : issue.getFieldInputs().entrySet()) {
+            detail.put(entry.getKey(), entry.getValue().getValues());
+        }
+        
+        Map<String, Collection<String>> linkedIssues = new HashMap<>();
+        for (var link: issue.getTargetLinks()) {
+            linkedIssues.computeIfAbsent(link.getSpec().getName(), k -> new ArrayList<>())
+                    .add(link.getTarget().getReference().toString(currentProject));
+        }
+        for (var link : issue.getSourceLinks()) {
+            if (link.getSpec().getOpposite() != null) {
+                linkedIssues.computeIfAbsent(link.getSpec().getOpposite().getName(), k -> new ArrayList<>())
+                        .add(link.getSource().getReference().toString(currentProject));
+            } else {
+                linkedIssues.computeIfAbsent(link.getSpec().getName(), k -> new ArrayList<>())
+                        .add(link.getSource().getReference().toString(currentProject));
+            }
+        }
+        detail.putAll(linkedIssues);
+        detail.put("link", getUrlService().urlFor(issue, true));
+
+        return detail;
+    }
+}

server-core/src/main/java/io/onedev/server/ai/McpHelperResource.java

@@ -10,7 +10,6 @@ import java.nio.charset.StandardCharsets;
 import java.text.MessageFormat;
 import java.util.ArrayList;
 import java.util.Arrays;
-import java.util.Collection;
 import java.util.Date;
 import java.util.HashMap;
 import java.util.HashSet;
@@ -709,16 +708,16 @@ public class McpHelperResource {
             parsedQuery = new IssueQuery();
         }
 
-        var issues = new ArrayList<Map<String, Object>>();
+        var summaries = new ArrayList<Map<String, Object>>();
         for (var issue : issueService.query(subject, new ProjectScope(projectInfo.project, true, false), parsedQuery, true, offset, count)) {
-            var issueMap = getIssueMap(projectInfo.currentProject, issue);
+            var summary = IssueHelper.getSummary(projectInfo.currentProject, issue);
             for (var entry: issue.getFieldInputs().entrySet()) {
-                issueMap.put(entry.getKey(), entry.getValue().getValues());
+                summary.put(entry.getKey(), entry.getValue().getValues());
             }
-            issueMap.put("link", urlService.urlFor(issue, true));
+            summary.put("link", urlService.urlFor(issue, true));
-            issues.add(issueMap);
+            summaries.add(summary);
         }
-        return issues;
+        return summaries;
     }
 
     private Issue getIssue(Project currentProject, String referenceString) {
@@ -733,29 +732,6 @@ public class McpHelperResource {
         }
     }
     
-    private Map<String, Object> getIssueMap(Project currentProject, Issue issue) {
-        var typeReference = new TypeReference<LinkedHashMap<String, Object>>() {};
-        var issueMap = objectMapper.convertValue(issue, typeReference);
-        issueMap.remove("id");
-        issueMap.remove("stateOrdinal");
-        issueMap.remove("uuid");
-        issueMap.remove("messageId");
-        issueMap.remove("pinDate");
-        issueMap.remove("boardPosition");
-        issueMap.remove("numberScopeId");
-        issueMap.put("reference", issue.getReference().toString(currentProject));
-        issueMap.remove("submitterId");
-        issueMap.put("submitter", issue.getSubmitter().getName());
-        issueMap.put("Project", issue.getProject().getPath());
-        issueMap.remove("lastActivity");
-        for (var it = issueMap.entrySet().iterator(); it.hasNext();) {
-            var entry = it.next();
-            if (entry.getKey().endsWith("Count"))
-                it.remove();
-        }
-        return issueMap;
-    }
-    
     @Path("/get-issue")
     @GET
     public Map<String, Object> getIssue(
@@ -766,30 +742,7 @@ public class McpHelperResource {
 
         var currentProject = getProject(currentProjectPath);
         var issue = getIssue(currentProject, issueReference);                
-                
+        return IssueHelper.getDetail(currentProject, issue);
-        var issueMap = getIssueMap(currentProject, issue);
-        for (var entry : issue.getFieldInputs().entrySet()) {
-            issueMap.put(entry.getKey(), entry.getValue().getValues());
-        }
-        
-        Map<String, Collection<String>> linkedIssues = new HashMap<>();
-        for (var link: issue.getTargetLinks()) {
-            linkedIssues.computeIfAbsent(link.getSpec().getName(), k -> new ArrayList<>())
-                    .add(link.getTarget().getReference().toString(currentProject));
-        }
-        for (var link : issue.getSourceLinks()) {
-            if (link.getSpec().getOpposite() != null) {
-                linkedIssues.computeIfAbsent(link.getSpec().getOpposite().getName(), k -> new ArrayList<>())
-                        .add(link.getSource().getReference().toString(currentProject));
-            } else {
-                linkedIssues.computeIfAbsent(link.getSpec().getName(), k -> new ArrayList<>())
-                        .add(link.getSource().getReference().toString(currentProject));
-            }
-        }
-        issueMap.putAll(linkedIssues);
-        issueMap.put("link", urlService.urlFor(issue, true));
-
-        return issueMap;
     }
 
     @Path("/get-issue-comments")
@@ -799,20 +752,9 @@ public class McpHelperResource {
                 @QueryParam("reference") @NotNull String issueReference) {
         if (SecurityUtils.getUser() == null)
             throw new UnauthenticatedException();
-
         var currentProject = getProject(currentProjectPath);
-
         var issue = getIssue(currentProject, issueReference);
-                
+        return IssueHelper.getComments(issue);
-        var comments = new ArrayList<Map<String, Object>>();
-        for (var comment : issue.getComments()) {
-            var commentMap = new HashMap<String, Object>();
-            commentMap.put("user", comment.getUser().getName());
-            commentMap.put("date", comment.getDate());
-            commentMap.put("content", comment.getContent());
-            comments.add(commentMap);
-        }
-        return comments;
     }
 
     @Path("/add-issue-comment")
@@ -1093,40 +1035,6 @@ public class McpHelperResource {
         }        
     }    
 
-    private Map<String, Object> getPullRequestMap(Project currentProject, 
-            PullRequest pullRequest, boolean checkMergeConditionIfOpen) {
-        var typeReference = new TypeReference<LinkedHashMap<String, Object>>() {};
-        var pullRequestMap = objectMapper.convertValue(pullRequest, typeReference);
-        pullRequestMap.remove("id");
-        if (pullRequest.isOpen() && checkMergeConditionIfOpen) {
-            var errorMessage = pullRequest.checkMergeCondition();
-            if (errorMessage != null) 
-                pullRequestMap.put("status", PullRequest.Status.OPEN.name() + " (" + errorMessage + ")");
-            else
-                pullRequestMap.put("status", PullRequest.Status.OPEN.name() + " (ready to merge)");
-        } 
-        pullRequestMap.remove("uuid");
-        pullRequestMap.remove("buildCommitHash");
-        pullRequestMap.remove("submitTimeGroups");
-        pullRequestMap.remove("closeTimeGroups");
-        pullRequestMap.remove("checkError");
-        pullRequestMap.remove("numberScopeId");
-        pullRequestMap.put("reference", pullRequest.getReference().toString(currentProject));
-        pullRequestMap.remove("submitterId");
-        pullRequestMap.put("submitter", pullRequest.getSubmitter().getName());
-        pullRequestMap.put("targetProject", pullRequest.getTarget().getProject().getPath());
-        if (pullRequest.getSourceProject() != null)
-            pullRequestMap.put("sourceProject", pullRequest.getSourceProject().getPath());
-        pullRequestMap.remove("codeCommentsUpdateDate");
-        pullRequestMap.remove("lastActivity");
-        for (var it = pullRequestMap.entrySet().iterator(); it.hasNext();) {
-            var entry = it.next();
-            if (entry.getKey().endsWith("Count"))
-                it.remove();
-        }
-        return pullRequestMap;
-    }
-
     @Path("/query-pull-requests")
     @GET
     public List<Map<String, Object>> queryPullRequests(
@@ -1154,13 +1062,13 @@ public class McpHelperResource {
             parsedQuery = new PullRequestQuery();
         }
 
-        var pullRequests = new ArrayList<Map<String, Object>>();
+        var summaries = new ArrayList<Map<String, Object>>();
         for (var pullRequest : pullRequestService.query(subject, projectInfo.project, parsedQuery, false, offset, count)) {
-            var pullRequestMap = getPullRequestMap(projectInfo.currentProject, pullRequest, false);
+            var summary = PullRequestHelper.getSummary(projectInfo.currentProject, pullRequest, false);
-            pullRequestMap.put("link", urlService.urlFor(pullRequest, true));
+            summary.put("link", urlService.urlFor(pullRequest, true));
-            pullRequests.add(pullRequestMap);
+            summaries.add(summary);
         }
-        return pullRequests;
+        return summaries;
     }
 
     @Path("/query-builds")
@@ -1249,31 +1157,8 @@ public class McpHelperResource {
             throw new UnauthenticatedException();
 
         var currentProject = getProject(currentProjectPath);
-
         var pullRequest = getPullRequest(currentProject, pullRequestReference);
-                
+        return PullRequestHelper.getDetail(currentProject, pullRequest);
-        var pullRequestMap = getPullRequestMap(currentProject, pullRequest, true);        
-        pullRequestMap.put("headCommitHash", pullRequest.getLatestUpdate().getHeadCommitHash());
-        pullRequestMap.put("assignees", pullRequest.getAssignees().stream().map(it->it.getName()).collect(Collectors.toList()));
-        var reviews = new ArrayList<Map<String, Object>>();
-        for (var review : pullRequest.getReviews()) {
-            if (review.getStatus() == PullRequestReview.Status.EXCLUDED)
-                continue;
-            var reviewMap = new HashMap<String, Object>();
-            reviewMap.put("reviewer", review.getUser().getName());
-            reviewMap.put("status", review.getStatus());
-            reviews.add(reviewMap);
-        }        
-        pullRequestMap.put("reviews", reviews);
-        var builds = new ArrayList<String>();
-        for (var build : pullRequest.getBuilds()) {
-            builds.add(build.getReference().toString(currentProject) + " (job: " + build.getJobName() + ", status: " + build.getStatus() + ")");
-        }
-        pullRequestMap.put("builds", builds);
-        pullRequestMap.put("labels", pullRequest.getLabels().stream().map(it->it.getSpec().getName()).collect(Collectors.toList()));
-        pullRequestMap.put("link", urlService.urlFor(pullRequest, true));
-
-        return pullRequestMap;
     }
 
     @Path("/get-pull-request-comments")
@@ -1287,15 +1172,7 @@ public class McpHelperResource {
         var currentProject = getProject(currentProjectPath);
         var pullRequest = getPullRequest(currentProject, pullRequestReference);
                 
-        var comments = new ArrayList<Map<String, Object>>();
+        return PullRequestHelper.getComments(pullRequest);
-        for (var comment : pullRequest.getComments()) {
-            var commentMap = new HashMap<String, Object>();
-            commentMap.put("user", comment.getUser().getName());
-            commentMap.put("date", comment.getDate());
-            commentMap.put("content", comment.getContent());
-            comments.add(commentMap);
-        }
-        return comments;
     }
 
     @Path("/get-pull-request-code-comments")

server-core/src/main/java/io/onedev/server/ai/PullRequestHelper.java

@@ -0,0 +1,102 @@
+package io.onedev.server.ai;
+
+import java.util.ArrayList;
+import java.util.Comparator;
+import java.util.HashMap;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.stream.Collectors;
+
+import com.fasterxml.jackson.core.type.TypeReference;
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+import io.onedev.server.OneDev;
+import io.onedev.server.model.Project;
+import io.onedev.server.model.PullRequest;
+import io.onedev.server.model.PullRequestComment;
+import io.onedev.server.model.PullRequestReview;
+import io.onedev.server.web.UrlService;
+
+public class PullRequestHelper {
+    
+    private static ObjectMapper getObjectMapper() {
+        return OneDev.getInstance(ObjectMapper.class);
+    }
+
+    private static UrlService getUrlService() {
+        return OneDev.getInstance(UrlService.class);
+    }
+
+    public static Map<String, Object> getSummary(Project currentProject, 
+            PullRequest pullRequest, boolean checkMergeConditionIfOpen) {        
+        var typeReference = new TypeReference<LinkedHashMap<String, Object>>() {};
+        var summary = getObjectMapper().convertValue(pullRequest, typeReference);
+        summary.remove("id");
+        if (pullRequest.isOpen() && checkMergeConditionIfOpen) {
+            var errorMessage = pullRequest.checkMergeCondition();
+            if (errorMessage != null) 
+                summary.put("status", PullRequest.Status.OPEN.name() + " (" + errorMessage + ")");
+            else
+                summary.put("status", PullRequest.Status.OPEN.name() + " (ready to merge)");
+        } 
+        summary.remove("uuid");
+        summary.remove("buildCommitHash");
+        summary.remove("submitTimeGroups");
+        summary.remove("closeTimeGroups");
+        summary.remove("checkError");
+        summary.remove("numberScopeId");
+        summary.put("reference", pullRequest.getReference().toString(currentProject));
+        summary.remove("submitterId");
+        summary.put("submitter", pullRequest.getSubmitter().getName());
+        summary.put("targetProject", pullRequest.getTarget().getProject().getPath());
+        if (pullRequest.getSourceProject() != null)
+            summary.put("sourceProject", pullRequest.getSourceProject().getPath());
+        summary.remove("codeCommentsUpdateDate");
+        summary.remove("lastActivity");
+        for (var it = summary.entrySet().iterator(); it.hasNext();) {
+            var entry = it.next();
+            if (entry.getKey().endsWith("Count"))
+                it.remove();
+        }
+        return summary;
+    }
+
+    public static Map<String, Object> getDetail(Project currentProject, PullRequest pullRequest) {
+        var detail = getSummary(currentProject, pullRequest, true);        
+        detail.put("headCommitHash", pullRequest.getLatestUpdate().getHeadCommitHash());
+        detail.put("assignees", pullRequest.getAssignees().stream().map(it->it.getName()).collect(Collectors.toList()));
+        var reviews = new ArrayList<Map<String, Object>>();
+        for (var review : pullRequest.getReviews()) {
+            if (review.getStatus() == PullRequestReview.Status.EXCLUDED)
+                continue;
+            var reviewMap = new HashMap<String, Object>();
+            reviewMap.put("reviewer", review.getUser().getName());
+            reviewMap.put("status", review.getStatus());
+            reviews.add(reviewMap);
+        }        
+        detail.put("reviews", reviews);
+        var builds = new ArrayList<String>();
+        for (var build : pullRequest.getBuilds()) {
+            builds.add(build.getReference().toString(currentProject) + " (job: " + build.getJobName() + ", status: " + build.getStatus() + ")");
+        }
+        detail.put("builds", builds);
+        detail.put("labels", pullRequest.getLabels().stream().map(it->it.getSpec().getName()).collect(Collectors.toList()));
+        detail.put("link", getUrlService().urlFor(pullRequest, true));
+
+        return detail;
+    }
+
+    public static List<Map<String, Object>> getComments(PullRequest pullRequest) {
+        var comments = new ArrayList<Map<String, Object>>();
+        pullRequest.getComments().stream().sorted(Comparator.comparing(PullRequestComment::getId)).forEach(comment -> {
+            var commentMap = new HashMap<String, Object>();
+            commentMap.put("user", comment.getUser().getName());
+            commentMap.put("date", comment.getDate());
+            commentMap.put("content", comment.getContent());
+            comments.add(commentMap);
+        });
+        return comments;
+    }
+
+}

server-core/src/main/java/io/onedev/server/model/Chat.java

@@ -102,15 +102,15 @@ public class Chat extends AbstractEntity {
 	}
 	
 	public static String getChangeObservable(Long chatId) {
-		return "chat:" + chatId;
+		return Chat.class.getName() + ":" + chatId;
 	}
 
 	public static String getPartialResponseObservable(Long chatId) {
-		return "chat:" + chatId + ":partialResponse";
+		return Chat.class.getName() + ":partialResponse:" + chatId;
 	}
 
 	public static String getNewMessagesObservable(Long chatId) {
-		return "chat:" + chatId + ":newMessages";
+		return Chat.class.getName() + ":newMessages:" + chatId;
 	}
 
 }

server-core/src/main/java/io/onedev/server/service/ChatService.java

@@ -8,6 +8,8 @@ import io.onedev.server.model.Chat;
 import io.onedev.server.model.ChatMessage;
 import io.onedev.server.model.User;
 import io.onedev.server.service.support.ChatResponding;
+import io.onedev.server.service.support.ChatTool;
+import io.onedev.server.web.WebSession;
 
 public interface ChatService extends EntityService<Chat> {
 
@@ -15,9 +17,13 @@ public interface ChatService extends EntityService<Chat> {
 		
 	void createOrUpdate(Chat chat);
 
-    void sendRequest(String sessionId, ChatMessage request);
+    void sendRequest(WebSession session, ChatMessage request, List<ChatTool> tools, int timeoutSeconds);
 	
     @Nullable
-    ChatResponding getResponding(String sessionId, Chat chat);
+    ChatResponding getResponding(WebSession session, Chat chat);
+
+    long nextAnonymousChatId();
+
+    long nextAnonymousChatMessageId();
 
 }

server-core/src/main/java/io/onedev/server/service/impl/DefaultChatService.java

@@ -1,25 +1,38 @@
 package io.onedev.server.service.impl;
 
+import static com.google.common.base.Preconditions.checkNotNull;
+
+import java.util.ArrayList;
 import java.util.List;
 import java.util.Map;
+import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.ConcurrentHashMap;
-import java.util.concurrent.CountDownLatch;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Future;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.TimeoutException;
 import java.util.stream.Collectors;
 
 import javax.inject.Inject;
 import javax.inject.Singleton;
 
+import org.apache.commons.lang3.SerializationUtils;
+import org.apache.shiro.subject.Subject;
+import org.apache.shiro.util.ThreadContext;
 import org.hibernate.criterion.Order;
 import org.hibernate.criterion.Restrictions;
 import org.jspecify.annotations.Nullable;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.hazelcast.cp.IAtomicLong;
+
 import dev.langchain4j.data.message.AiMessage;
 import dev.langchain4j.data.message.SystemMessage;
+import dev.langchain4j.data.message.ToolExecutionResultMessage;
 import dev.langchain4j.data.message.UserMessage;
+import dev.langchain4j.model.chat.request.ChatRequest;
 import dev.langchain4j.model.chat.response.ChatResponse;
 import dev.langchain4j.model.chat.response.PartialResponse;
 import dev.langchain4j.model.chat.response.PartialResponseContext;
@@ -28,18 +41,26 @@ import dev.langchain4j.model.chat.response.PartialThinkingContext;
 import dev.langchain4j.model.chat.response.PartialToolCall;
 import dev.langchain4j.model.chat.response.PartialToolCallContext;
 import dev.langchain4j.model.chat.response.StreamingChatResponseHandler;
+import io.onedev.commons.utils.ExplicitException;
 import io.onedev.commons.utils.StringUtils;
+import io.onedev.server.cluster.ClusterService;
+import io.onedev.server.event.Listen;
+import io.onedev.server.event.system.SystemStarting;
 import io.onedev.server.exception.ExceptionUtils;
 import io.onedev.server.model.Chat;
 import io.onedev.server.model.ChatMessage;
 import io.onedev.server.model.User;
+import io.onedev.server.persistence.SessionService;
 import io.onedev.server.persistence.TransactionService;
 import io.onedev.server.persistence.annotation.Sessional;
 import io.onedev.server.persistence.annotation.Transactional;
 import io.onedev.server.persistence.dao.EntityCriteria;
+import io.onedev.server.security.SecurityUtils;
 import io.onedev.server.service.ChatService;
 import io.onedev.server.service.support.ChatResponding;
+import io.onedev.server.service.support.ChatTool;
 import io.onedev.server.web.SessionListener;
+import io.onedev.server.web.WebSession;
 import io.onedev.server.web.websocket.WebSocketService;
 
 @Singleton
@@ -62,6 +83,23 @@ public class DefaultChatService extends BaseEntityService<Chat> implements ChatS
 	@Inject
 	private WebSocketService webSocketService;
 
+	@Inject
+	private ObjectMapper objectMapper;
+
+	@Inject
+	private SessionService sessionService;
+
+	@Inject
+	private ClusterService clusterService;
+
+	/*
+	 * Use cluster wide id for anonymous chats and messages as we use id to route 
+	 * websocket observable changes to correct connections
+	 */
+	private volatile IAtomicLong nextAnonymousChatId;
+
+	private volatile IAtomicLong nextAnonymousChatMessageId;
+
 	private final Map<String, Map<Long, ChatRespondingImpl>> respondings = new ConcurrentHashMap<>();
 	
 	@Override
@@ -70,7 +108,7 @@ public class DefaultChatService extends BaseEntityService<Chat> implements ChatS
 		criteria.add(Restrictions.eq(Chat.PROP_USER, user));
 		criteria.add(Restrictions.eq(Chat.PROP_AI, ai));
 		criteria.add(Restrictions.ilike(Chat.PROP_TITLE, "%" + term + "%"));
-		criteria.addOrder(Order.desc(Chat.PROP_DATE));
+		criteria.addOrder(Order.desc(Chat.PROP_ID));
 		return query(criteria);
 	}
 
@@ -81,16 +119,22 @@ public class DefaultChatService extends BaseEntityService<Chat> implements ChatS
 
 	@Sessional
 	@Override
-	public ChatResponding getResponding(String sessionId, Chat chat) {
+	public ChatResponding getResponding(WebSession session, Chat chat) {
-		return getResponding(sessionId, chat.getId());
+		return getResponding(session.getId(), chat.getId());
 	}
 
 	@Transactional
 	@Override
-	public void sendRequest(String sessionId, ChatMessage request) {
+	public void sendRequest(WebSession session, ChatMessage request, List<ChatTool> tools, int timeoutSeconds) {
+		var sessionId = session.getId();
 		var requestId = request.getId();
 		var chatId = request.getChat().getId();
+		var anonymous = request.getChat().getUser() == null;
+
 		var modelSetting = request.getChat().getAi().getAiSetting().getModelSetting();
+		var streamingChatModel = modelSetting.getStreamingChatModel();
+		var chatModel = modelSetting.getChatModel();
+		
 		var messages = request.getChat().getSortedMessages()
 			.stream()
 			.filter(it->!it.isError())
@@ -99,27 +143,34 @@ public class DefaultChatService extends BaseEntityService<Chat> implements ChatS
 		if (messages.size() > MAX_HISTORY_MESSAGES)
 			messages = messages.subList(messages.size()-MAX_HISTORY_MESSAGES, messages.size());
 		
-		var langchain4jMessages = messages.stream()
+		var langchain4jMessages = new ArrayList<dev.langchain4j.data.message.ChatMessage>();
+		langchain4jMessages.addAll(messages.stream()
 			.map(it -> {
 				var content = it.getContent();
 				if (!it.equals(request))
 					content = StringUtils.abbreviate(content, MAX_HISTORY_MESSAGE_LEN);
 				if (it.isRequest())
-					return new UserMessage(content);
+					return (dev.langchain4j.data.message.ChatMessage) new UserMessage(content);
 				else
-					return new AiMessage(content);
+					return (dev.langchain4j.data.message.ChatMessage) new AiMessage(content);
 			})
-			.collect(Collectors.toList());
+			.collect(Collectors.toList()));
 
-		var future = executorService.submit(() -> {
+		var toolSpecifications = tools.stream()
-			var latch = new CountDownLatch(1);
+			.map(ChatTool::getSpecification)
-			var handler = new StreamingChatResponseHandler() {
+			.collect(Collectors.toList());
+		var completableFuture = new CompletableFuture<String>();
+		var executableFuture = executorService.submit(new Runnable() {
+
+			private StreamingChatResponseHandler newResponseHandler(Subject subject) {
+				return new StreamingChatResponseHandler() {
 
 					private long lastPartialResponseNotificationTime = System.currentTimeMillis();
 
 					@Override
 					public void onPartialResponse(PartialResponse partialResponse, PartialResponseContext context) {	
-					if (latch.getCount() == 0) {
+						ThreadContext.bind(subject);				
+						if (completableFuture.isDone()) {
 							context.streamingHandle().cancel();
 						} else {
 							var responding = getResponding(sessionId, chatId, requestId);
@@ -139,66 +190,156 @@ public class DefaultChatService extends BaseEntityService<Chat> implements ChatS
 					
 					@Override
 					public void onPartialThinking(PartialThinking partialThinking, PartialThinkingContext context) {				
-					if (latch.getCount() == 0)
+						ThreadContext.bind(subject);				
+						if (completableFuture.isDone())
 							context.streamingHandle().cancel();
 					}
 
 					@Override
 					public void onPartialToolCall(PartialToolCall partialToolCall, PartialToolCallContext context) {
-					if (latch.getCount() == 0)
+						ThreadContext.bind(subject);				
+						if (completableFuture.isDone()) {
 							context.streamingHandle().cancel();
 						}
+					}
 
 					@Override
 					public void onCompleteResponse(ChatResponse completeResponse) {	
+						ThreadContext.bind(subject);
+						sessionService.runAsync(() -> {
 							try {
-						createResponseIfNecessary(sessionId, chatId, requestId, completeResponse.aiMessage().text(), null);												
+								var aiMessage = completeResponse.aiMessage();
-					} finally {
+								if (aiMessage.hasToolExecutionRequests()) {
-						latch.countDown();													
+									langchain4jMessages.add(aiMessage);
+									var toolRequests = aiMessage.toolExecutionRequests();
+									for (int i = 0; i < toolRequests.size(); i++) {
+										var toolRequest = toolRequests.get(i);
+										String toolName = toolRequest.name();
+										String toolArgs = toolRequest.arguments();
+										var toolResult = tools.stream()
+												.filter(it->it.getSpecification().name().equals(toolName))
+												.findFirst()
+												.orElseThrow(() -> new ExplicitException("Unknown tool: " + toolName))
+												.execute(objectMapper.readTree(toolArgs));														
+										ToolExecutionResultMessage toolResultMessage = ToolExecutionResultMessage.from(
+											toolRequest.id(), toolName, toolResult);
+										langchain4jMessages.add(toolResultMessage);
 									}
+									
+									var handler = newResponseHandler(SecurityUtils.getSubject());
+									var langchain4jChatRequest = ChatRequest.builder()
+											.messages(new ArrayList<>(langchain4jMessages))
+											.toolSpecifications(toolSpecifications)
+											.build();							
+									streamingChatModel.chat(langchain4jChatRequest, handler);
+								} else {
+									completableFuture.complete(aiMessage.text());
+								}	
+							} catch (Throwable t) {
+								completableFuture.completeExceptionally(t);
+							}
+						});
 					}
 
 					@Override
 					public void onError(Throwable error) {
-					try {
+						ThreadContext.bind(subject);				
-						createResponseIfNecessary(sessionId, chatId, requestId, "Error getting chat response, check server log for details", error);
+						completableFuture.completeExceptionally(error);
-					} finally {
-						latch.countDown();
-					}
 					}
 
 				};		
-			try {
+			}
-				modelSetting.getStreamingChatModel().chat(langchain4jMessages, handler);
+
+			private void createResponse(String content, @Nullable Throwable throwable) {
+				var responding = getResponding(session.getId(), chatId, requestId);
+				if (responding != null) {
 					transactionService.run(() -> {
-					var chat = load(chatId);
+						if (throwable != null)
+							logger.error("Error getting chat response", throwable);
+						var response = new ChatMessage();
+						response.setError(throwable != null);
+						response.setContent(content);
+						if (anonymous) {
+							var chat = SerializationUtils.clone(checkNotNull(session.getAnonymousChats().get(chatId)));
+							response.setChat(chat);
+							response.setId(nextAnonymousChatMessageId());
+							chat.getMessages().add(response);
+							session.getAnonymousChats().put(chatId, chat);
+						} else {
+							response.setChat(load(chatId));
+							dao.persist(response);
+						}
+						webSocketService.notifyObservableChange(Chat.getNewMessagesObservable(chatId), null);
+					});
+				};
+			}	
+
+			private void createIncompleteResponse(String reason) {
+				var responding = getResponding(sessionId, chatId, requestId);
+				if (responding != null) { 
+					var content = responding.getContent();
+					if (content == null)
+						content = "";
+					else
+						content += "\n\n";							
+					content += "<b class='text text-danger'>" + reason + "</b>";
+					createResponse(content, null);
+				}
+			}
+
+			@Override
+			public void run() {
+				var handler = newResponseHandler(SecurityUtils.getSubject());
+				try {
+					var langchain4jChatRequest = ChatRequest.builder()
+						.messages(langchain4jMessages.stream()
+							.map(msg -> (dev.langchain4j.data.message.ChatMessage) msg)
+							.collect(Collectors.toList()))
+						.toolSpecifications(toolSpecifications)
+						.build();
+					
+					streamingChatModel.chat(langchain4jChatRequest, handler);
+					transactionService.run(() -> {
+						var chat = anonymous ? checkNotNull(session.getAnonymousChats().get(chatId)) : load(chatId);
 						var requests = chat.getMessages().stream().filter(it->it.isRequest()).collect(Collectors.toList());
 						if (requests.size() == 1) {
 							var systemPrompt = String.format("""
 								Summarize provided message to get a compact title with below requirements:
-							1. It should be within %d characters
+								1. Just summarize the message itself, no need to ask user for clarification or confirmation
-							2. Only title is returned, no other text or comments
+								2. It should be within %d characters
-						""", Chat.MAX_TITLE_LEN);
+								3. Only title is returned, no other text or comments
-						var title = modelSetting.getChatModel().chat(new SystemMessage(systemPrompt), new UserMessage(requests.get(0).getContent())).aiMessage().text();
+								4. Display in %s
+								""", Chat.MAX_TITLE_LEN, session.getLocale().getDisplayLanguage());
+							var title = chatModel.chat(new SystemMessage(systemPrompt), new UserMessage(requests.get(0).getContent())).aiMessage().text();
+							if (anonymous) {
+								chat = SerializationUtils.clone(chat);
 								chat.setTitle(title);
+								session.getAnonymousChats().put(chatId, chat);
+							} else {
+								chat.setTitle(title);
+								dao.persist(chat);
+							}
 							webSocketService.notifyObservableChange(Chat.getChangeObservable(chatId), null);
 						}
 					});		
-				latch.await();	
+					var response = completableFuture.get(timeoutSeconds, TimeUnit.SECONDS);
-			} catch (Exception e) {			
+					if (StringUtils.isBlank(response))
-				if (ExceptionUtils.find(e, InterruptedException.class) == null) {
+						throw new ExplicitException("Received empty response");		
+					createResponse(response, null);
+				} catch (Throwable e) {
+					if (ExceptionUtils.find(e, InterruptedException.class) != null) {
+						createIncompleteResponse("Conversation cancelled");
+					} else if (ExceptionUtils.find(e, TimeoutException.class) != null) {
+						createIncompleteResponse("Conversation timed out");
+					} else {
 						logger.error("Error getting chat response", e);
 						String errorMessage = e.getMessage();
 						if (errorMessage == null)
 							errorMessage = "Error getting chat response, check server log for details";
-					createResponseIfNecessary(sessionId, chatId, requestId, errorMessage, e);
+						createResponse(errorMessage, e);
-				} else {
-					var responding = getResponding(sessionId, chatId, requestId);
-					if (responding != null && responding.getContent() != null) 
-						createResponseIfNecessary(sessionId, chatId, requestId, responding.getContent(), null);
 					}
 				} finally {
-				latch.countDown();
+					completableFuture.cancel(false);
 					var respondingsOfSession = respondings.get(sessionId);				
 					if (respondingsOfSession != null) {
 						var responding = respondingsOfSession.get(chatId);
@@ -213,9 +354,10 @@ public class DefaultChatService extends BaseEntityService<Chat> implements ChatS
 						}
 					}
 				}
+			}
 		});
 
-		var previousResponding = respondings.computeIfAbsent(sessionId, it->new ConcurrentHashMap<>()).put(chatId, new ChatRespondingImpl(requestId, future));
+		var previousResponding = respondings.computeIfAbsent(sessionId, it->new ConcurrentHashMap<>()).put(chatId, new ChatRespondingImpl(requestId, executableFuture));
 		if (previousResponding != null) 
 			previousResponding.cancel();
 	}
@@ -236,21 +378,24 @@ public class DefaultChatService extends BaseEntityService<Chat> implements ChatS
 			return null;
 	}
 
-	private void createResponseIfNecessary(String sessionId, Long chatId, Long requestId, String content, @Nullable Throwable throwable) {
+	@Listen
-		var responding = getResponding(sessionId, chatId, requestId);
+	public void on(SystemStarting event) {
-		if (responding != null) {
+		nextAnonymousChatId = clusterService.getHazelcastInstance().getCPSubsystem().getAtomicLong("nextAnonymousChatId");
-			transactionService.run(() -> {
+		nextAnonymousChatMessageId = clusterService.getHazelcastInstance().getCPSubsystem().getAtomicLong("nextAnonymousChatMessageId");
-				var chat = load(chatId);			
+		if (clusterService.isLeaderServer()) {
-				if (throwable != null)
+			nextAnonymousChatId.set(1L);
-					logger.error("Error getting chat response", throwable);
+			nextAnonymousChatMessageId.set(1L);
-				var response = new ChatMessage();
+		}		
-				response.setChat(chat);
+	}
-				response.setError(throwable != null);
+
-				response.setContent(content);
+	@Override
-				dao.persist(response);
+	public long nextAnonymousChatId() {
-				webSocketService.notifyObservableChange(Chat.getNewMessagesObservable(chatId), null);
+		return nextAnonymousChatId.getAndIncrement();
-			});
+	}
-		};
+
+	@Override
+	public long nextAnonymousChatMessageId() {
+		return nextAnonymousChatMessageId.getAndIncrement();
 	}
 
 	@Override

server-core/src/main/java/io/onedev/server/service/support/ChatTool.java

@@ -0,0 +1,21 @@
+package io.onedev.server.service.support;
+
+import com.fasterxml.jackson.databind.JsonNode;
+
+import dev.langchain4j.agent.tool.ToolSpecification;
+
+public interface ChatTool {
+
+    ToolSpecification getSpecification();
+
+    /**
+     * This method should not rely on any Wicket facilities, such as page, component, model etc. 
+     * If you need to access some data from these facilities, make sure to prepare them while 
+     * creating the tool
+     * 
+     * @param arguments
+     * @return
+     */
+    String execute(JsonNode arguments);
+
+}

server-core/src/main/java/io/onedev/server/web/WebSession.java

@@ -5,7 +5,6 @@ import java.util.Map;
 import java.util.Set;
 import java.util.concurrent.ConcurrentHashMap;
 
-import org.jspecify.annotations.Nullable;
 import javax.servlet.http.HttpSession;
 
 import org.apache.shiro.SecurityUtils;
@@ -14,8 +13,10 @@ import org.apache.shiro.subject.Subject;
 import org.apache.wicket.protocol.http.WicketServlet;
 import org.apache.wicket.request.Request;
 import org.apache.wicket.util.collections.ConcurrentHashSet;
+import org.jspecify.annotations.Nullable;
 
 import io.onedev.server.OneDev;
+import io.onedev.server.model.Chat;
 import io.onedev.server.web.util.Cursor;
 
 public class WebSession extends org.apache.wicket.protocol.http.WebSession {
@@ -36,11 +37,13 @@ public class WebSession extends org.apache.wicket.protocol.http.WebSession {
 	
 	private Set<Long> expandedProjectIds = new ConcurrentHashSet<>();
 
-	private boolean chatVisible;
+	private volatile boolean chatVisible;
 		
-	private Long activeChatId;
+	private volatile Long activeChatId;
 
-	private String chatInput;
+ 	private volatile Map<Long, Chat> anonymousChats = new ConcurrentHashMap<>();
+
+	private volatile String chatInput;
 	
 	public WebSession(Request request) {
 		super(request);
@@ -141,6 +144,10 @@ public class WebSession extends org.apache.wicket.protocol.http.WebSession {
 		this.activeChatId = activeChatId;
 	}
 
+	public Map<Long, Chat> getAnonymousChats() {
+		return anonymousChats;
+	}
+
 	@Nullable
 	public String getChatInput() {
 		return chatInput;

server-core/src/main/java/io/onedev/server/web/asset/icon/ai-summarize.svg

@@ -0,0 +1 @@
+<?xml version="1.0" standalone="no"?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"><svg t="1764891371306" class="icon" viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="9180" xmlns:xlink="http://www.w3.org/1999/xlink" width="200" height="200"><path d="M789.333333 512V234.666667q0-42.666667-42.666666-42.666667H234.666667q-42.666667 0-42.666667 42.666667v554.666666q0 42.666667 42.666667 42.666667h298.666666a42.666667 42.666667 0 1 1 0 85.333333H234.666667q-53.013333 0-90.517334-37.482666Q106.666667 842.346667 106.666667 789.333333V234.666667q0-53.013333 37.482666-90.517334Q181.653333 106.666667 234.666667 106.666667h512q53.013333 0 90.517333 37.482666Q874.666667 181.653333 874.666667 234.666667v277.333333a42.666667 42.666667 0 1 1-85.333334 0zM490.666667 277.333333h-170.666667a42.666667 42.666667 0 1 0 0 85.333334h170.666667a42.666667 42.666667 0 1 0 0-85.333334z m213.333333 213.333334a42.666667 42.666667 0 0 0-42.666667-42.666667H320a42.666667 42.666667 0 1 0 0 85.333333h341.333333a42.666667 42.666667 0 0 0 42.666667-42.666666zM320 704h85.333333a42.666667 42.666667 0 1 0 0-85.333333h-85.333333a42.666667 42.666667 0 1 0 0 85.333333z m310.442667 79.36c-15.701333-4.202667-15.701333-26.517333 0-30.72l7.722666-2.090667a159.274667 159.274667 0 0 0 112.384-112.384l2.069334-7.722666c4.224-15.701333 26.538667-15.701333 30.762666 0l2.069334 7.722666a159.274667 159.274667 0 0 0 112.384 112.384l7.701333 2.069334c15.722667 4.224 15.722667 26.538667 0 30.762666l-7.68 2.069334a159.274667 159.274667 0 0 0-112.426667 112.384l-2.048 7.701333c-4.224 15.722667-26.538667 15.722667-30.762666 0l-2.069334-7.68a159.274667 159.274667 0 0 0-112.384-112.405333l-7.722666-2.069334z" p-id="9181"></path></svg>

server-core/src/main/java/io/onedev/server/web/component/ai/chat/ChatPanel.html

@@ -1,8 +1,8 @@
 <wicket:panel>
 	<div class="ui-resizable-handle ui-resizable-w"></div>
-	<div class="head d-flex align-items-center justify-content-between px-4 py-3 border-bottom">
+	<div class="head d-flex align-items-center px-4 py-3 border-bottom">
-		<h5 class="card-title mb-0"><wicket:t>Chat with</wicket:t> <a wicket:id="aiSelector" class="ml-2"><img wicket:id="avatar"></img> <span wicket:id="name"></span> <wicket:svg href="arrow" class="icon rotate-90"></wicket:svg></a></h5>
+		<h5 class="card-title mb-0 mr-3"><wicket:t>Chat with</wicket:t> <a wicket:id="aiSelector" class="ml-2"><img wicket:id="avatar"></img> <span wicket:id="name"></span> <wicket:svg href="arrow" class="icon rotate-90"></wicket:svg></a></h5>
-		<a wicket:id="close" t:data-tippy-content="Close" class="btn btn-xs btn-icon btn-light btn-hover-primary"><wicket:svg href="times" class="icon"/></a>
+		<a wicket:id="close" t:data-tippy-content="Close" class="ml-auto btn btn-xs btn-icon btn-light btn-hover-primary"><wicket:svg href="times" class="icon"/></a>
 	</div>
 	<div class="body d-flex flex-column flex-grow-1 p-4 position-relative" style="overflow: hidden;">
 		<div wicket:id="chatSelectorContainer" class="chat-selector d-flex flex-shrink-0 mb-3">

server-core/src/main/java/io/onedev/server/web/component/ai/chat/ChatPanel.java

@@ -6,6 +6,7 @@ import static io.onedev.server.web.translation.Translation._T;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
+import java.util.Comparator;
 import java.util.Date;
 import java.util.List;
 import java.util.stream.Collectors;
@@ -13,6 +14,7 @@ import java.util.stream.Collectors;
 import javax.inject.Inject;
 import javax.servlet.http.Cookie;
 
+import org.apache.commons.lang3.SerializationUtils;
 import org.apache.wicket.Component;
 import org.apache.wicket.ajax.AjaxRequestTarget;
 import org.apache.wicket.ajax.form.AjaxFormComponentUpdatingBehavior;
@@ -31,10 +33,13 @@ import org.apache.wicket.markup.html.panel.Panel;
 import org.apache.wicket.markup.repeater.RepeatingView;
 import org.apache.wicket.model.AbstractReadOnlyModel;
 import org.apache.wicket.model.IModel;
+import org.apache.wicket.model.LoadableDetachableModel;
 import org.apache.wicket.model.Model;
 import org.apache.wicket.request.cycle.RequestCycle;
 import org.apache.wicket.request.http.WebRequest;
 import org.apache.wicket.request.http.WebResponse;
+import org.apache.wicket.util.visit.IVisit;
+import org.apache.wicket.util.visit.IVisitor;
 import org.json.JSONException;
 import org.json.JSONWriter;
 import org.jspecify.annotations.Nullable;
@@ -46,6 +51,8 @@ import io.onedev.server.persistence.dao.Dao;
 import io.onedev.server.service.ChatService;
 import io.onedev.server.service.UserService;
 import io.onedev.server.service.support.ChatResponding;
+import io.onedev.server.service.support.ChatTool;
+import io.onedev.server.util.facade.UserFacade;
 import io.onedev.server.web.WebConstants;
 import io.onedev.server.web.WebSession;
 import io.onedev.server.web.behavior.ChangeObserver;
@@ -59,11 +66,14 @@ import io.onedev.server.web.component.select2.ChoiceProvider;
 import io.onedev.server.web.component.select2.ResponseFiller;
 import io.onedev.server.web.component.select2.Select2Choice;
 import io.onedev.server.web.component.user.UserAvatar;
+import io.onedev.server.web.util.ChatToolAware;
 
 public class ChatPanel extends Panel {
 
 	private static final long serialVersionUID = 1L;
 
+	private static final int TIMEOUT_SECONDS = 120;
+
 	private static final String COOKIE_ACTIVE_AI = "active-ai";
 
 	@Inject
@@ -81,6 +91,23 @@ public class ChatPanel extends Panel {
 
 	private WebMarkupContainer respondingContainer;
 
+	private final IModel<List<User>> entitledAisModel = new LoadableDetachableModel<List<User>>() {
+
+		@Override
+		protected List<User> load() {
+			if (getUser() != null) {
+				return getUser().getEntitledAis();
+			} else {
+				return userService.cloneCache().values().stream()
+						.filter(it -> it.getType() == User.Type.AI && !it.isDisabled() && it.isEntitleToAll())
+						.sorted(Comparator.comparing(UserFacade::getDisplayName))
+						.map(it->userService.load(it.getId()))
+						.collect(Collectors.toList());
+			}
+		}
+
+	};
+			
 	public ChatPanel(String componentId) {
 		super(componentId);
 
@@ -100,7 +127,7 @@ public class ChatPanel extends Panel {
 			protected List<MenuItem> getMenuItems(FloatingPanel dropdown) {
 				var activeAI = getActiveAI();
 				var menuItems = new ArrayList<MenuItem>();
-				for (var ai : getUser().getEntitledAis()) {
+				for (var ai : getEntitledAis()) {
 					menuItems.add(new MenuItem() {
 
 						@Override
@@ -172,7 +199,16 @@ public class ChatPanel extends Panel {
 			@Override
 			public void query(String term, int page, io.onedev.server.web.component.select2.Response<Chat> response) {
 				var count = (page+1) * WebConstants.PAGE_SIZE + 1;
-				var chats = chatService.query(getUser(), getActiveAI(), term, count);
+				List<Chat> chats;
+				if (getUser() != null) {
+					chats = chatService.query(getUser(), getActiveAI(), term, count);
+				} else {
+					chats = WebSession.get().getAnonymousChats().values().stream()
+						.filter(it -> it.getAi().equals(getActiveAI()) && it.getTitle().toLowerCase().contains(term.toLowerCase()))
+						.sorted(Comparator.comparing(Chat::getId).reversed())
+						.limit(count)
+						.collect(Collectors.toList());
+				}
 				new ResponseFiller<>(response).fill(chats, page, WebConstants.PAGE_SIZE);
 			}
 
@@ -205,10 +241,6 @@ public class ChatPanel extends Panel {
 					return Collections.emptySet();
 			}
 
-			public void onObservableChanged(IPartialPageRequestHandler handler, Collection<String> changedObservables) {
-				handler.add(chatSelectorContainer);
-			}
-
 		});
 		chatSelectorContainer.add(new ChangeObserver() {
 
@@ -223,10 +255,11 @@ public class ChatPanel extends Panel {
 
 			@Override
 			public void onObservableChanged(IPartialPageRequestHandler handler, Collection<String> changedObservables) {
+				if (isVisible())
 					showNewMessages(handler);
 			}
-		});
 
+		});
 
 		chatSelectorContainer.add(new AjaxLink<Void>("newChat") {
 
@@ -242,7 +275,10 @@ public class ChatPanel extends Panel {
 			@Override
 			public void onClick(AjaxRequestTarget target) {
 				getSession().success(_T("Chat deleted"));
+				if (getUser() != null) 
 					chatService.delete(getActiveChat());
+				else
+					WebSession.get().getAnonymousChats().remove(getActiveChat().getId());
 				WebSession.get().setActiveChatId(null);
 				target.add(ChatPanel.this);
 			}
@@ -337,23 +373,55 @@ public class ChatPanel extends Panel {
 			protected void onSubmit(AjaxRequestTarget target, Form<?> form) {
 				var input = WebSession.get().getChatInput().trim();
 				var chat = getActiveChat();
+				ChatMessage request = new ChatMessage();
+				request.setRequest(true);
+				request.setContent(input);
 				if (chat == null) {
 					chat = new Chat();
 					chat.setUser(getUser());
 					chat.setAi(getActiveAI());
 					chat.setTitle(_T("New chat"));
 					chat.setDate(new Date());
+					if (getUser() != null) {
 						chatService.createOrUpdate(chat);
-					WebSession.get().setActiveChatId(chat.getId());
-					target.add(chatSelectorContainer);
-				}
-				var request = new ChatMessage();
 						request.setChat(chat);
-				request.setRequest(true);
-				request.setContent(input);
 						chat.getMessages().add(request);
 						dao.persist(request);				
-				chatService.sendRequest(getSession().getId(), request);
+					} else {
+						chat.setId(chatService.nextAnonymousChatId());
+						request.setId(chatService.nextAnonymousChatMessageId());
+						request.setChat(chat);
+						chat.getMessages().add(request);
+						WebSession.get().getAnonymousChats().put(chat.getId(), chat);
+					}
+					WebSession.get().setActiveChatId(chat.getId());
+					target.add(chatSelectorContainer);	
+				} else {
+					if (getUser() != null) {
+						request.setChat(chat);
+						chat.getMessages().add(request);
+						dao.persist(request);				
+					} else {
+						request.setId(chatService.nextAnonymousChatMessageId());
+						chat = SerializationUtils.clone(chat);
+						request.setChat(chat);
+						chat.getMessages().add(request);
+						WebSession.get().getAnonymousChats().put(chat.getId(), chat);
+					}
+				}
+
+				List<ChatTool> chatTools = new ArrayList<>();
+				if (getPage() instanceof ChatToolAware) 
+					chatTools.addAll(((ChatToolAware) getPage()).getChatTools());
+				getPage().visitChildren(ChatToolAware.class, new IVisitor<Component, Void>() {
+
+					@Override
+					public void component(Component component, IVisit<Void> visit) {
+						chatTools.addAll(((ChatToolAware) component).getChatTools());
+					}
+
+				});				
+				chatService.sendRequest(WebSession.get(), request, chatTools, TIMEOUT_SECONDS);
 
 				showNewMessages(target);
 				target.add(respondingContainer);
@@ -388,10 +456,10 @@ public class ChatPanel extends Panel {
 	private User getActiveAI() {
 		if (activeAiId != null) {
 			var ai = userService.get(activeAiId);
-			if (ai != null && getUser().getEntitledAis().contains(ai))
+			if (ai != null && getEntitledAis().contains(ai))
 				return ai;
 		}
-		return getUser().getEntitledAis().get(0);
+		return getEntitledAis().get(0);
 	}
 
 	private void setActiveAI(User ai) {
@@ -408,7 +476,11 @@ public class ChatPanel extends Panel {
 	private Chat getActiveChat() {
 		var activeChatId = WebSession.get().getActiveChatId();
 		if (activeChatId != null) {
-			var chat = chatService.get(activeChatId);
+			Chat chat;
+			if (getUser() != null) 
+				chat = chatService.get(activeChatId);
+			else
+				chat = WebSession.get().getAnonymousChats().get(activeChatId);			
 			if (chat != null && chat.getAi().equals(getActiveAI()))
 				return chat;
 		}
@@ -419,7 +491,7 @@ public class ChatPanel extends Panel {
 	private ChatResponding getResponding() {
 		var chat = getActiveChat();
 		if (chat != null)
-			return chatService.getResponding(getSession().getId(), chat);
+			return chatService.getResponding(WebSession.get(), chat);
 		else
 			return null;
 	}
@@ -434,12 +506,13 @@ public class ChatPanel extends Panel {
 
 	@SuppressWarnings("deprecation")
 	private void showNewMessages(IPartialPageRequestHandler handler) {
-		long lastMessageId;
+		long prevLastMessageId;
 		if (messagesView.size() != 0)
-			lastMessageId = (Long) messagesView.get(messagesView.size() - 1).getDefaultModelObject();
+			prevLastMessageId = (Long) messagesView.get(messagesView.size() - 1).getDefaultModelObject();
 		else
-			lastMessageId = 0;
+			prevLastMessageId = 0;
-		getMessages().stream().filter(it -> it.getId() > lastMessageId).forEach(it -> {
+		
+		getMessages().stream().filter(it -> it.getId() > prevLastMessageId).forEach(it -> {
 			var messageContainer = newMessageContainer(messagesView.newChildId(), it);
 			messagesView.add(messageContainer);
 			handler.prependJavaScript(String.format("""
@@ -447,11 +520,14 @@ public class ChatPanel extends Panel {
 				""", respondingContainer.getMarkupId(), messageContainer.getMarkupId()));
 			handler.add(messageContainer);
 		});
+
 		var lastMessage = messagesView.get(messagesView.size() - 1);
+		if ((Long) lastMessage.getDefaultModelObject() > prevLastMessageId) {
 			handler.appendJavaScript(String.format("""
 				$('#%s')[0].scrollIntoView({ block: "end" });
 				""", lastMessage.getMarkupId()));
 		}
+	}
 
 	private Component newMessageContainer(String containerId, ChatMessage message) {
 		var messageContainer = new WebMarkupContainer(containerId, Model.of(message.getId()));
@@ -493,7 +569,7 @@ public class ChatPanel extends Panel {
 	@Override
 	protected void onConfigure() {
 		super.onConfigure();
-		setVisible(WebSession.get().isChatVisible());
+		setVisible(WebSession.get().isChatVisible() && !getEntitledAis().isEmpty());
 	}
 	
 	@Override
@@ -504,16 +580,25 @@ public class ChatPanel extends Panel {
 	}
 
 	@Override
-	public boolean isVisible() {
+	protected void onDetach() {
-		return WebSession.get().isChatVisible();
+		super.onDetach();
+		entitledAisModel.detach();
 	}
 
-	public void show(AjaxRequestTarget target) {
+	public List<User> getEntitledAis() {
-		if (!isVisible()) {
+		return entitledAisModel.getObject();
+	}
+
+	public void show(AjaxRequestTarget target, @Nullable String prompt) {
 		WebSession.get().setChatVisible(true);
 		WebSession.get().setActiveChatId(null);
-			target.add(this);	
+		if (prompt != null) {
+			WebSession.get().setChatInput(prompt);
+			target.appendJavaScript("""
+				$(".chat>.body>.send .submit").click();
+				""");
 		}	
+		target.add(this);
 	}
 
 	public void hide(AjaxRequestTarget target) {

server-core/src/main/java/io/onedev/server/web/component/ai/chat/chat.css

@@ -1,25 +1,20 @@
 .chat {
 	position: fixed;
-	top: calc(var(--topbar-height) + 1rem);
+	top: 0;
 	bottom: 0;
 	right: 0;
-	z-index: 1000;
+	z-index: 2000;
-	border-radius: 0.42rem 0 0 0;
 	background: white;
-	box-shadow: 0 0 12px rgba(0,0,0,0.2), 0 -2px 8px rgba(0,0,0,0.1);	
+	box-shadow: 0 0 12px rgba(0,0,0,0.2);	
-}
-.chat>.head {
-	border-radius: 0.42rem 0 0 0;
 }
 .dark-mode .chat {
 	background-color: var(--dark-mode-dark);	
-	box-shadow: 0 0 20px rgb(0 0 0 / 50%), 0 -2px 15px rgb(0 0 0 / 30%);	
+	box-shadow: 0 0 20px rgb(0 0 0 / 50%);	
 }
 
 .chat .ui-resizable-handle {
 	position: absolute;
 	left: 0;
-	top: 0.42rem;
 	bottom: 0;
 	width: 3px;
 	cursor: col-resize;

server-core/src/main/java/io/onedev/server/web/component/issue/activities/IssueActivitiesPanel.html

@@ -18,10 +18,11 @@
 		</form>
 	</wicket:fragment>
 	<wicket:fragment wicket:id="optionsFrag">
-		<div class="issue-activity-options">
+		<a wicket:id="aiSummarize" t:data-tippy-content="Summarize comments with AI" class="btn btn-xs btn-outline-secondary btn-hover-primary btn-icon"><wicket:svg href="ai-summarize" class="icon"></wicket:svg></a>
-			<a wicket:id="showComments" t:data-tippy-content="Toggle comments" class="btn btn-xs text-muted btn-active-secondary btn-icon"><wicket:svg href="comments" class="icon"></wicket:svg></a>
+		<div class="btn-group">
-			<a wicket:id="showChangeHistory" t:data-tippy-content="Toggle change history" class="btn btn-xs text-muted btn-active-secondary btn-icon"><wicket:svg href="history" class="icon"></wicket:svg></a>
+			<a wicket:id="showComments" t:data-tippy-content="Toggle comments" class="btn btn-xs text-muted btn-outline-secondary btn-active-secondary btn-icon"><wicket:svg href="comments" class="icon"></wicket:svg></a>
-			<a wicket:id="showWorkLog" t:data-tippy-content="Toggle work log" class="btn btn-xs text-muted btn-active-secondary btn-icon"><wicket:svg href="info" class="icon"></wicket:svg></a>
+			<a wicket:id="showChangeHistory" t:data-tippy-content="Toggle change history" class="btn btn-xs text-muted btn-outline-secondary btn-active-secondary btn-icon"><wicket:svg href="history" class="icon"></wicket:svg></a>
+			<a wicket:id="showWorkLog" t:data-tippy-content="Toggle work log" class="btn btn-xs text-muted btn-outline-secondary btn-active-secondary btn-icon"><wicket:svg href="info" class="icon"></wicket:svg></a>
 		</div>
 	</wicket:fragment>
 </wicket:panel>

server-core/src/main/java/io/onedev/server/web/component/issue/activities/IssueActivitiesPanel.java

@@ -39,7 +39,6 @@ import com.google.common.collect.Lists;
 import io.onedev.server.OneDev;
 import io.onedev.server.attachment.AttachmentSupport;
 import io.onedev.server.attachment.ProjectAttachmentSupport;
-import io.onedev.server.service.IssueCommentService;
 import io.onedev.server.entityreference.ReferencedFromAware;
 import io.onedev.server.model.Issue;
 import io.onedev.server.model.IssueChange;
@@ -53,6 +52,7 @@ import io.onedev.server.model.support.issue.changedata.IssueOwnSpentTimeChangeDa
 import io.onedev.server.model.support.issue.changedata.IssueTotalEstimatedTimeChangeData;
 import io.onedev.server.model.support.issue.changedata.IssueTotalSpentTimeChangeData;
 import io.onedev.server.security.SecurityUtils;
+import io.onedev.server.service.IssueCommentService;
 import io.onedev.server.web.ajaxlistener.ConfirmLeaveListener;
 import io.onedev.server.web.behavior.ChangeObserver;
 import io.onedev.server.web.component.comment.CommentInput;
@@ -61,6 +61,7 @@ import io.onedev.server.web.component.issue.activities.activity.IssueChangeActiv
 import io.onedev.server.web.component.issue.activities.activity.IssueCommentActivity;
 import io.onedev.server.web.component.issue.activities.activity.IssueWorkActivity;
 import io.onedev.server.web.page.base.BasePage;
+import io.onedev.server.web.page.layout.LayoutPage;
 import io.onedev.server.web.page.security.LoginPage;
 import io.onedev.server.web.util.WicketUtils;
 
@@ -327,6 +328,23 @@ public abstract class IssueActivitiesPanel extends Panel {
 
 	public Component renderOptions(String componentId) {
 		Fragment fragment = new Fragment(componentId, "optionsFrag", this);
+
+		fragment.add(new AjaxLink<Void>("aiSummarize") {
+
+			@Override
+			public void onClick(AjaxRequestTarget target) {
+				var page = (LayoutPage)getPage();
+				page.getChatter().show(target, "Summarize comments of current issue. Display summary in " + getSession().getLocale().getDisplayLanguage());
+			}
+
+			@Override
+			protected void onConfigure() {
+				super.onConfigure();
+				var page = (LayoutPage)getPage();
+				setVisible(!page.getChatter().getEntitledAis().isEmpty());
+			}
+		});
+
 		fragment.add(showCommentsLink = new AjaxLink<Void>("showComments") {
 
 			@Override

server-core/src/main/java/io/onedev/server/web/page/layout/LayoutPage.java

@@ -176,6 +176,8 @@ public abstract class LayoutPage extends BasePage {
 
 	private AbstractDefaultAjaxBehavior newVersionStatusBehavior;
 
+	private ChatPanel chatter;
+
 	public LayoutPage(PageParameters params) {
 		super(params);
 	}
@@ -811,20 +813,20 @@ public abstract class LayoutPage extends BasePage {
 
 		});
 
-		var chat = new ChatPanel("chat");
+		chatter = new ChatPanel("chat");
-		add(chat);
+		add(chatter);
 
 		topbar.add(new AjaxLink<Void>("showChat") {
 
 			@Override
 			public void onClick(AjaxRequestTarget target) {
-				chat.show(target);
+				chatter.show(target, null);
 			}
 		
 			@Override
 			protected void onConfigure() {
 				super.onConfigure();
-				setVisible(getLoginUser() != null && !getLoginUser().getEntitledAis().isEmpty());
+				setVisible(!chatter.getEntitledAis().isEmpty());
 			}
 
 		});
@@ -1287,6 +1289,10 @@ public abstract class LayoutPage extends BasePage {
 		response.render(OnLoadHeaderItem.forScript("onedev.server.layout.onLoad();"));
 	}
 
+	public ChatPanel getChatter() {
+		return chatter;
+	}
+
 	protected List<SidebarMenu> getSidebarMenus() {
 		return Lists.newArrayList();
 	}

server-core/src/main/java/io/onedev/server/web/page/project/issues/detail/IssueDetailPage.java

@@ -7,6 +7,7 @@ import java.util.ArrayList;
 import java.util.Collection;
 import java.util.List;
 
+import javax.inject.Inject;
 import javax.persistence.EntityNotFoundException;
 import javax.validation.ValidationException;
 
@@ -31,14 +32,15 @@ import org.apache.wicket.request.cycle.RequestCycle;
 import org.apache.wicket.request.flow.RedirectToUrlException;
 import org.apache.wicket.request.mapper.parameter.PageParameters;
 
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
 import com.google.common.collect.Lists;
 
-import io.onedev.server.OneDev;
+import dev.langchain4j.agent.tool.ToolSpecification;
+import io.onedev.server.ai.IssueHelper;
 import io.onedev.server.buildspecmodel.inputspec.InputContext;
 import io.onedev.server.data.migration.VersionedXmlDoc;
-import io.onedev.server.service.IssueLinkService;
-import io.onedev.server.service.IssueService;
-import io.onedev.server.service.SettingService;
 import io.onedev.server.model.Issue;
 import io.onedev.server.model.Project;
 import io.onedev.server.model.support.issue.field.spec.FieldSpec;
@@ -46,6 +48,10 @@ import io.onedev.server.search.entity.EntityQuery;
 import io.onedev.server.search.entity.issue.IssueQuery;
 import io.onedev.server.search.entity.issue.IssueQueryParseOption;
 import io.onedev.server.security.SecurityUtils;
+import io.onedev.server.service.IssueLinkService;
+import io.onedev.server.service.IssueService;
+import io.onedev.server.service.SettingService;
+import io.onedev.server.service.support.ChatTool;
 import io.onedev.server.util.ProjectScope;
 import io.onedev.server.web.WebSession;
 import io.onedev.server.web.behavior.ChangeObserver;
@@ -65,12 +71,13 @@ import io.onedev.server.web.page.project.ProjectPage;
 import io.onedev.server.web.page.project.dashboard.ProjectDashboardPage;
 import io.onedev.server.web.page.project.issues.ProjectIssuesPage;
 import io.onedev.server.web.page.project.issues.list.ProjectIssueListPage;
+import io.onedev.server.web.util.ChatToolAware;
 import io.onedev.server.web.util.ConfirmClickModifier;
 import io.onedev.server.web.util.Cursor;
 import io.onedev.server.web.util.CursorSupport;
 import io.onedev.server.xodus.VisitInfoService;
 
-public abstract class IssueDetailPage extends ProjectIssuesPage implements InputContext {
+public abstract class IssueDetailPage extends ProjectIssuesPage implements InputContext, ChatToolAware {
 
 	public static final String PARAM_ISSUE = "issue";
 	
@@ -78,6 +85,21 @@ public abstract class IssueDetailPage extends ProjectIssuesPage implements Input
 
 	protected final IModel<Issue> issueModel;
 
+	@Inject
+	private ObjectMapper objectMapper;
+
+	@Inject
+	private IssueService issueService;
+
+	@Inject
+	private IssueLinkService issueLinkService;
+
+	@Inject
+	private VisitInfoService visitInfoService;
+
+	@Inject
+	private SettingService settingService;
+	
 	public IssueDetailPage(PageParameters params) {
 		super(params);
 		
@@ -98,11 +120,11 @@ public abstract class IssueDetailPage extends ProjectIssuesPage implements Input
 					throw new ValidationException(MessageFormat.format(_T("Invalid issue number: {0}"), issueNumberString));
 				}
 				
-				Issue issue = getIssueService().find(getProject(), issueNumber);
+				Issue issue = issueService.find(getProject(), issueNumber);
 				if (issue == null) { 
 					throw new EntityNotFoundException(MessageFormat.format(_T("Unable to find issue #{0} in project {1}"), issueNumber, getProject()));
 				} else {
-					OneDev.getInstance(IssueLinkService.class).loadDeepLinks(issue);
+					issueLinkService.loadDeepLinks(issue);
 					if (!issue.getProject().equals(getProject())) 
 						throw new RestartResponseException(getPageClass(), paramsOf(issue));
 					return issue;
@@ -293,7 +315,7 @@ public abstract class IssueDetailPage extends ProjectIssuesPage implements Input
 
 							@Override
 							public void onClick() {
-								getIssueService().delete(getIssue());
+								issueService.delete(getIssue());
 								var oldAuditContent = VersionedXmlDoc.fromBean(getIssue()).toXML();
 								auditService.audit(getIssue().getProject(), "deleted issue \"" + getIssue().getReference().toString(getIssue().getProject()) + "\"", oldAuditContent, null);
 								
@@ -331,7 +353,7 @@ public abstract class IssueDetailPage extends ProjectIssuesPage implements Input
 
 					@Override
 					protected List<Issue> query(EntityQuery<Issue> query, int offset, int count, ProjectScope projectScope) {
-						return getIssueService().query(SecurityUtils.getSubject(), projectScope, query, false, offset, count);
+						return issueService.query(SecurityUtils.getSubject(), projectScope, query, false, offset, count);
 					}
 
 					@Override
@@ -362,13 +384,59 @@ public abstract class IssueDetailPage extends ProjectIssuesPage implements Input
 			@Override
 			public void onEndRequest(RequestCycle cycle) {
 				if (SecurityUtils.getAuthUser() != null) 
-					OneDev.getInstance(VisitInfoService.class).visitIssue(SecurityUtils.getAuthUser(), getIssue());
+					visitInfoService.visitIssue(SecurityUtils.getAuthUser(), getIssue());
 			}
 						
 		});	
 
 	}
 
+	@Override
+	public List<ChatTool> getChatTools() {
+		var issueId = getIssue().getId();
+		return List.of(new ChatTool() {
+
+			@Override
+			public ToolSpecification getSpecification() {
+				return ToolSpecification.builder()
+					.name("getCurrentIssue")
+					.description("Get info of current issue in json format")
+					.build();
+			}
+
+			@Override
+			public String execute(JsonNode arguments) {
+				var issue = issueService.load(issueId);
+				try {
+					return objectMapper.writeValueAsString(IssueHelper.getDetail(issue.getProject(), issue));
+				} catch (JsonProcessingException e) {
+					throw new RuntimeException(e);
+				}
+			}
+			
+		}, new ChatTool() {
+
+			@Override
+			public ToolSpecification getSpecification() {
+				return ToolSpecification.builder()
+					.name("getCurrentIssueComments")
+					.description("Get comments of current issue in json format")
+					.build();
+			}
+
+			@Override
+			public String execute(JsonNode arguments) {	
+				var issue = issueService.load(issueId);			
+				try {
+					return objectMapper.writeValueAsString(IssueHelper.getComments(issue));
+				} catch (JsonProcessingException e) {
+					throw new RuntimeException(e);
+				}
+			}
+			
+		});
+	}
+	
 	@Override
 	protected void onDetach() {
 		issueModel.detach();
@@ -392,11 +460,7 @@ public abstract class IssueDetailPage extends ProjectIssuesPage implements Input
 
 	@Override
 	public FieldSpec getInputSpec(String inputName) {
-		return OneDev.getInstance(SettingService.class).getIssueSetting().getFieldSpec(inputName);
+		return settingService.getIssueSetting().getFieldSpec(inputName);
-	}
-	
-	private IssueService getIssueService() {
-		return OneDev.getInstance(IssueService.class);
 	}
 		
 	@Override

server-core/src/main/java/io/onedev/server/web/page/project/pullrequests/detail/PullRequestDetailPage.java

@@ -17,9 +17,11 @@ import java.util.Comparator;
 import java.util.Date;
 import java.util.HashMap;
 import java.util.List;
+import java.util.Set;
 import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.stream.Collectors;
 
+import javax.inject.Inject;
 import javax.persistence.EntityNotFoundException;
 import javax.validation.ValidationException;
 
@@ -64,21 +66,16 @@ import org.apache.wicket.request.mapper.parameter.PageParameters;
 import org.eclipse.jgit.lib.ObjectId;
 import org.jetbrains.annotations.Nullable;
 
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
 import com.google.common.collect.Sets;
 
-import io.onedev.server.OneDev;
+import dev.langchain4j.agent.tool.ToolSpecification;
+import io.onedev.server.ai.PullRequestHelper;
 import io.onedev.server.attachment.AttachmentSupport;
 import io.onedev.server.attachment.ProjectAttachmentSupport;
 import io.onedev.server.data.migration.VersionedXmlDoc;
-import io.onedev.server.service.PullRequestAssignmentService;
-import io.onedev.server.service.PullRequestChangeService;
-import io.onedev.server.service.PullRequestLabelService;
-import io.onedev.server.service.PullRequestService;
-import io.onedev.server.service.PullRequestReactionService;
-import io.onedev.server.service.PullRequestReviewService;
-import io.onedev.server.service.PullRequestWatchService;
-import io.onedev.server.service.SettingService;
-import io.onedev.server.service.UserService;
 import io.onedev.server.entityreference.EntityReference;
 import io.onedev.server.entityreference.LinkTransformer;
 import io.onedev.server.git.GitUtils;
@@ -106,6 +103,16 @@ import io.onedev.server.search.entity.pullrequest.PullRequestQuery;
 import io.onedev.server.security.SecurityUtils;
 import io.onedev.server.security.permission.ProjectPermission;
 import io.onedev.server.security.permission.ReadCode;
+import io.onedev.server.service.PullRequestAssignmentService;
+import io.onedev.server.service.PullRequestChangeService;
+import io.onedev.server.service.PullRequestLabelService;
+import io.onedev.server.service.PullRequestReactionService;
+import io.onedev.server.service.PullRequestReviewService;
+import io.onedev.server.service.PullRequestService;
+import io.onedev.server.service.PullRequestWatchService;
+import io.onedev.server.service.SettingService;
+import io.onedev.server.service.UserService;
+import io.onedev.server.service.support.ChatTool;
 import io.onedev.server.util.DateUtils;
 import io.onedev.server.util.ProjectScope;
 import io.onedev.server.web.WebSession;
@@ -159,6 +166,7 @@ import io.onedev.server.web.page.project.pullrequests.detail.changes.PullRequest
 import io.onedev.server.web.page.project.pullrequests.detail.codecomments.PullRequestCodeCommentsPage;
 import io.onedev.server.web.page.project.pullrequests.detail.operationdlg.MergePullRequestOptionPanel;
 import io.onedev.server.web.page.project.pullrequests.detail.operationdlg.OperationCommentPanel;
+import io.onedev.server.web.util.ChatToolAware;
 import io.onedev.server.web.util.ConfirmClickModifier;
 import io.onedev.server.web.util.Cursor;
 import io.onedev.server.web.util.CursorSupport;
@@ -169,7 +177,7 @@ import io.onedev.server.web.util.editbean.CommitMessageBean;
 import io.onedev.server.web.util.editbean.LabelsBean;
 import io.onedev.server.xodus.VisitInfoService;
 
-public abstract class PullRequestDetailPage extends ProjectPage implements PullRequestAware {
+public abstract class PullRequestDetailPage extends ProjectPage implements PullRequestAware, ChatToolAware {
 
 	public static final String PARAM_REQUEST = "request";
 
@@ -185,6 +193,45 @@ public abstract class PullRequestDetailPage extends ProjectPage implements PullR
 
 	private MergeStrategy mergeStrategy;
 
+	@Inject
+	private ObjectMapper objectMapper;
+
+	@Inject
+	private PullRequestService pullRequestService;
+
+	@Inject
+	private GitService gitService;
+
+	@Inject
+	private PullRequestReviewService pullRequestReviewService;
+
+	@Inject
+	private PullRequestChangeService pullRequestChangeService;
+
+	@Inject
+	private PullRequestAssignmentService pullRequestAssignmentService;
+
+	@Inject
+	private PullRequestLabelService pullRequestLabelService;
+
+	@Inject
+	private PullRequestWatchService pullRequestWatchService;
+
+	@Inject
+	private PullRequestReactionService pullRequestReactionService;
+
+	@Inject
+	private UserService userService;
+
+	@Inject
+	private SettingService settingService;
+
+	@Inject
+	private VisitInfoService visitInfoService;	
+
+	@Inject
+	private Set<PullRequestSummaryContribution> summaryContributions;
+
 	public PullRequestDetailPage(PageParameters params) {
 		super(params);
 
@@ -205,7 +252,7 @@ public abstract class PullRequestDetailPage extends ProjectPage implements PullR
 					throw new ValidationException(MessageFormat.format(_T("Invalid pull request number: {0}"), requestNumberString));
 				}
 
-				PullRequest request = getPullRequestService().find(getProject(), requestNumber);
+				PullRequest request = pullRequestService.find(getProject(), requestNumber);
 				if (request == null) {
 					throw new EntityNotFoundException(MessageFormat.format(_T("Unable to find pull request #{0} in project {1}"), requestNumber, getProject().getPath()));
 				} else if (!request.getTargetProject().equals(getProject())) {
@@ -225,22 +272,6 @@ public abstract class PullRequestDetailPage extends ProjectPage implements PullR
 		latestUpdateId = requestModel.getObject().getLatestUpdate().getId();
 	}
 
-	private GitService getGitService() {
-		return OneDev.getInstance(GitService.class);
-	}
-
-	private PullRequestService getPullRequestService() {
-		return OneDev.getInstance(PullRequestService.class);
-	}
-
-	private PullRequestReviewService getPullRequestReviewService() {
-		return OneDev.getInstance(PullRequestReviewService.class);
-	}
-
-	private PullRequestChangeService getPullRequestChangeService() {
-		return OneDev.getInstance(PullRequestChangeService.class);
-	}
-
 	private WebMarkupContainer newRequestHead() {
 		WebMarkupContainer requestHead = new WebMarkupContainer("requestHeader");
 		requestHead.setOutputMarkupId(true);
@@ -340,7 +371,7 @@ public abstract class PullRequestDetailPage extends ProjectPage implements PullR
 				super.onSubmit(target, form);
 
 				var user = SecurityUtils.getUser();
-				OneDev.getInstance(PullRequestChangeService.class).changeTitle(user, getPullRequest(), title);
+				pullRequestChangeService.changeTitle(user, getPullRequest(), title);
 				notifyPullRequestChange(target);
 				isEditingTitle = false;
 
@@ -919,7 +950,7 @@ public abstract class PullRequestDetailPage extends ProjectPage implements PullR
 			@Override
 			public void onEndRequest(RequestCycle cycle) {
 				if (SecurityUtils.getAuthUser() != null)
-					OneDev.getInstance(VisitInfoService.class).visitPullRequest(SecurityUtils.getAuthUser(), getPullRequest());
+					visitInfoService.visitPullRequest(SecurityUtils.getAuthUser(), getPullRequest());
 			}
 
 		});
@@ -980,7 +1011,7 @@ public abstract class PullRequestDetailPage extends ProjectPage implements PullR
 											@Override
 											public void onClick(AjaxRequestTarget target) {
 												var user = SecurityUtils.getUser();
-												OneDev.getInstance(PullRequestChangeService.class).changeTargetBranch(user, getPullRequest(), branch);
+												pullRequestChangeService.changeTargetBranch(user, getPullRequest(), branch);
 												notifyPullRequestChange(target);
 												dropdown.close();
 											}
@@ -1087,7 +1118,7 @@ public abstract class PullRequestDetailPage extends ProjectPage implements PullR
 						var assignment = new PullRequestAssignment();
 						assignment.setRequest(getPullRequest());
 						assignment.setUser(SecurityUtils.getUser());
-						OneDev.getInstance(PullRequestAssignmentService.class).create(assignment);
+						pullRequestAssignmentService.create(assignment);
 						((BasePage)getPage()).notifyObservableChange(target,
 								PullRequest.getChangeObservable(getPullRequest().getId()));
 					}
@@ -1137,7 +1168,7 @@ public abstract class PullRequestDetailPage extends ProjectPage implements PullR
 						@Override
 						protected void onUpdated(IPartialPageRequestHandler handler, Serializable bean, String propertyName) {
 							LabelsBean labelsBean = (LabelsBean) bean;
-							OneDev.getInstance(PullRequestLabelService.class).sync(getPullRequest(), labelsBean.getLabels());
+							pullRequestLabelService.sync(getPullRequest(), labelsBean.getLabels());
 							handler.add(labelsContainer);
 						}
 
@@ -1184,12 +1215,12 @@ public abstract class PullRequestDetailPage extends ProjectPage implements PullR
 
 					@Override
 					protected void onSaveWatch(EntityWatch watch) {
-						OneDev.getInstance(PullRequestWatchService.class).createOrUpdate((PullRequestWatch) watch);
+						pullRequestWatchService.createOrUpdate((PullRequestWatch) watch);
 					}
 
 					@Override
 					protected void onDeleteWatch(EntityWatch watch) {
-						OneDev.getInstance(PullRequestWatchService.class).delete((PullRequestWatch) watch);
+						pullRequestWatchService.delete((PullRequestWatch) watch);
 					}
 
 					@Override
@@ -1217,7 +1248,7 @@ public abstract class PullRequestDetailPage extends ProjectPage implements PullR
 
 						@Override
 						public void onClick(AjaxRequestTarget target) {
-							getPullRequestService().checkAsync(getPullRequest(), false, true);
+							pullRequestService.checkAsync(getPullRequest(), false, true);
 							Session.get().success(_T("Pull request synchronization submitted"));
 						}
 
@@ -1227,7 +1258,7 @@ public abstract class PullRequestDetailPage extends ProjectPage implements PullR
 						@Override
 						public void onClick() {
 							PullRequest request = getPullRequest();
-							getPullRequestService().delete(request);
+							pullRequestService.delete(request);
 							var oldAuditContent = VersionedXmlDoc.fromBean(request).toXML();
 							auditService.audit(request.getProject(), "deleted pull request \"" + request.getReference().toString(request.getProject()) + "\"", oldAuditContent, null);
 
@@ -1278,7 +1309,7 @@ public abstract class PullRequestDetailPage extends ProjectPage implements PullR
 					@Override
 					protected List<PullRequest> query(EntityQuery<PullRequest> query,
 							int offset, int count, ProjectScope projectScope) {
-						return getPullRequestService().query(SecurityUtils.getSubject(), projectScope!=null?projectScope.getProject():null, query, false, offset, count);
+						return pullRequestService.query(SecurityUtils.getSubject(), projectScope!=null?projectScope.getProject():null, query, false, offset, count);
 					}
 
 					@Override
@@ -1347,7 +1378,7 @@ public abstract class PullRequestDetailPage extends ProjectPage implements PullR
 			@Override
 			protected void onUpdate(AjaxRequestTarget target) {
 				var user = SecurityUtils.getUser();
-				OneDev.getInstance(PullRequestChangeService.class).changeMergeStrategy(user, getPullRequest(), mergeStrategy);
+				pullRequestChangeService.changeMergeStrategy(user, getPullRequest(), mergeStrategy);
 				notifyPullRequestChange(target);
 			}
 
@@ -1420,7 +1451,7 @@ public abstract class PullRequestDetailPage extends ProjectPage implements PullR
 										@Override
 										protected String onSave(AjaxRequestTarget target, CommitMessageBean bean) {
 											var request = getPullRequest();
-											var system = OneDev.getInstance(UserService.class).getSystem();
+											var system = userService.getSystem();
 											var branchProtection = getProject().getBranchProtection(request.getTargetBranch(), system);
 											var errorMessage = branchProtection.checkCommitMessage(bean.getCommitMessage(),
 													request.getMergeStrategy() != SQUASH_SOURCE_BRANCH_COMMITS);
@@ -1429,10 +1460,10 @@ public abstract class PullRequestDetailPage extends ProjectPage implements PullR
 											} else {
 												autoMerge.setCommitMessage(bean.getCommitMessage());
 												var user = SecurityUtils.getUser();
-												getPullRequestChangeService().changeAutoMerge(user, request, autoMerge);
+												pullRequestChangeService.changeAutoMerge(user, request, autoMerge);
 												Session.get().success(_T("Preset commit message updated"));
 												close();
-												getPullRequestService().checkAutoMerge(request);
+												pullRequestService.checkAutoMerge(request);
 												return null;
 											}
 										}
@@ -1530,7 +1561,7 @@ public abstract class PullRequestDetailPage extends ProjectPage implements PullR
 									var autoMerge = new AutoMerge();
 									autoMerge.setEnabled(true);
 									autoMerge.setCommitMessage(bean.getCommitMessage());
-									getPullRequestChangeService().changeAutoMerge(user, getPullRequest(), autoMerge);
+									pullRequestChangeService.changeAutoMerge(user, getPullRequest(), autoMerge);
 									target.add(autoMergeContainer);
 									close();
 									return null;
@@ -1552,13 +1583,13 @@ public abstract class PullRequestDetailPage extends ProjectPage implements PullR
 						var autoMerge = new AutoMerge();
 						autoMerge.setEnabled(true);
 						autoMerge.setCommitMessage(request.getAutoMerge().getCommitMessage());
-						getPullRequestChangeService().changeAutoMerge(user, request, autoMerge);
+						pullRequestChangeService.changeAutoMerge(user, request, autoMerge);
 						target.add(autoMergeContainer);
 					}
 				} else {
 					var autoMerge = new AutoMerge();
 					autoMerge.setCommitMessage(request.getAutoMerge().getCommitMessage());
-					getPullRequestChangeService().changeAutoMerge(user, request, autoMerge);
+					pullRequestChangeService.changeAutoMerge(user, request, autoMerge);
 					target.add(autoMergeContainer);
 				}
 			}
@@ -1683,7 +1714,7 @@ public abstract class PullRequestDetailPage extends ProjectPage implements PullR
 			@Override
 			protected void onSaveComment(AjaxRequestTarget target, String comment) {
 				var user = SecurityUtils.getUser();
-				OneDev.getInstance(PullRequestChangeService.class).changeDescription(user, getPullRequest(), comment);
+				pullRequestChangeService.changeDescription(user, getPullRequest(), comment);
 				((BasePage)getPage()).notifyObservableChange(target,
 						PullRequest.getChangeObservable(getPullRequest().getId()));
 			}
@@ -1753,10 +1784,7 @@ public abstract class PullRequestDetailPage extends ProjectPage implements PullR
 	
 					@Override
 					public void onToggleEmoji(AjaxRequestTarget target, String emoji) {
-						OneDev.getInstance(PullRequestReactionService.class).toggleEmoji(
+						pullRequestReactionService.toggleEmoji(SecurityUtils.getUser(), getPullRequest(), emoji);
-								SecurityUtils.getUser(), 
-								getPullRequest(), 
-								emoji);
 					}
 				};
 			}
@@ -1799,8 +1827,7 @@ public abstract class PullRequestDetailPage extends ProjectPage implements PullR
 
 			@Override
 			protected List<PullRequestSummaryPart> load() {
-				List<PullRequestSummaryContribution> contributions =
+				List<PullRequestSummaryContribution> contributions = new ArrayList<>(summaryContributions);
-						new ArrayList<>(OneDev.getExtensions(PullRequestSummaryContribution.class));
 				contributions.sort(Comparator.comparing(PullRequestSummaryContribution::getOrder));
 
 				List<PullRequestSummaryPart> parts = new ArrayList<>();
@@ -1889,7 +1916,6 @@ public abstract class PullRequestDetailPage extends ProjectPage implements PullR
 												return errorMessage;
 											if (targetHead.equals(request.getTarget().getObjectId())
 													&& sourceHead.equals(request.getSourceHead())) {
-												var gitService = OneDev.getInstance(GitService.class);
 												var amendedCommitId = gitService.amendCommit(request.getProject(), mergeCommit.copy(),
 														mergeCommit.getAuthorIdent(), mergeCommit.getCommitterIdent(),
 														bean.getCommitMessage());
@@ -2001,7 +2027,7 @@ public abstract class PullRequestDetailPage extends ProjectPage implements PullR
 					@Override
 					protected String operate(AjaxRequestTarget target) {
 						if (canOperate()) {
-							getPullRequestReviewService().review(SecurityUtils.getUser(), getPullRequest(), true, getComment());
+							pullRequestReviewService.review(SecurityUtils.getUser(), getPullRequest(), true, getComment());
 							notifyPullRequestChange(target);
 							Session.get().success(_T("Approved"));
 							return null;
@@ -2044,7 +2070,7 @@ public abstract class PullRequestDetailPage extends ProjectPage implements PullR
 					@Override
 					protected String operate(AjaxRequestTarget target) {
 						if (canOperate()) {
-							getPullRequestReviewService().review(SecurityUtils.getUser(), getPullRequest(), false, getComment());
+							pullRequestReviewService.review(SecurityUtils.getUser(), getPullRequest(), false, getComment());
 							notifyPullRequestChange(target);
 							Session.get().success(_T("Requested For changes"));
 							return null;
@@ -2091,7 +2117,7 @@ public abstract class PullRequestDetailPage extends ProjectPage implements PullR
 								if (errorMessage != null)
 									return errorMessage;
 							}
-							getPullRequestService().merge(SecurityUtils.getUser(), getPullRequest(), commitMessage);
+							pullRequestService.merge(SecurityUtils.getUser(), getPullRequest(), commitMessage);
 							notifyPullRequestChange(target);
 							return null;
 						} else {
@@ -2123,7 +2149,7 @@ public abstract class PullRequestDetailPage extends ProjectPage implements PullR
 					@Override
 					protected String operate(AjaxRequestTarget target) {
 						if (canOperate()) {
-							getPullRequestService().discard(SecurityUtils.getUser(), getPullRequest(), getComment());
+							pullRequestService.discard(SecurityUtils.getUser(), getPullRequest(), getComment());
 							notifyPullRequestChange(target);
 							return null;
 						} else {
@@ -2160,7 +2186,7 @@ public abstract class PullRequestDetailPage extends ProjectPage implements PullR
 					@Override
 					protected String operate(AjaxRequestTarget target) {
 						if (canOperate()) {
-							getPullRequestService().reopen(SecurityUtils.getUser(), getPullRequest(), getComment());
+							pullRequestService.reopen(SecurityUtils.getUser(), getPullRequest(), getComment());
 							notifyPullRequestChange(target);
 							return null;
 						} else {
@@ -2199,7 +2225,7 @@ public abstract class PullRequestDetailPage extends ProjectPage implements PullR
 					@Override
 					protected String operate(AjaxRequestTarget target) {
 						if (canOperate()) {
-							getPullRequestService().deleteSourceBranch(SecurityUtils.getUser(), getPullRequest(), getComment());
+							pullRequestService.deleteSourceBranch(SecurityUtils.getUser(), getPullRequest(), getComment());
 							notifyPullRequestChange(target);
 							Session.get().success(_T("Deleted source branch"));
 							return null;
@@ -2239,7 +2265,7 @@ public abstract class PullRequestDetailPage extends ProjectPage implements PullR
 					@Override
 					protected String operate(AjaxRequestTarget target) {
 						if (canOperate()) {
-							getPullRequestService().restoreSourceBranch(SecurityUtils.getUser(), getPullRequest(), getComment());
+							pullRequestService.restoreSourceBranch(SecurityUtils.getUser(), getPullRequest(), getComment());
 							notifyPullRequestChange(target);
 							Session.get().success(_T("Restored source branch"));
 							return null;
@@ -2274,7 +2300,6 @@ public abstract class PullRequestDetailPage extends ProjectPage implements PullR
 		ObjectId targetHead = request.getTarget().getObjectId();
 		ObjectId mergeCommitId;
 
-		var gitService = getGitService();
 		if (updateByMerge) {
 			String commitMessage;
 			if (!request.getSourceProject().equals(project)) {
@@ -2300,8 +2325,7 @@ public abstract class PullRequestDetailPage extends ProjectPage implements PullR
 				&& !project.hasValidCommitSignature(project.getRevCommit(targetHead, true))) {
 			return _T("No valid signature for head commit of target branch");
 		}
-		if (protection.isCommitSignatureRequired()
+		if (protection.isCommitSignatureRequired() && settingService.getGpgSetting().getSigningKey() == null) {
-				&& OneDev.getInstance(SettingService.class).getGpgSetting().getSigningKey() == null) {
 			return _T("Commit signature required but no GPG signing key specified");
 		}
 		var error = gitService.checkCommitMessages(protection, project, sourceHead, mergeCommitId, new HashMap<>());
@@ -2313,11 +2337,10 @@ public abstract class PullRequestDetailPage extends ProjectPage implements PullR
 
 	private void updateSourceBranch(ObjectId commitId) {
 		var request = getPullRequest();
-		var gitService = getGitService();
 		if (!request.getSourceProject().equals(request.getTargetProject()))
 			gitService.fetch(request.getSourceProject(), request.getTargetProject(), commitId.name());
 		var oldCommitId = request.getSourceHead();
-		getGitService().updateRef(request.getSourceProject(), request.getSourceRef(), commitId, oldCommitId);
+		gitService.updateRef(request.getSourceProject(), request.getSourceRef(), commitId, oldCommitId);
 	}
 
 	@Override
@@ -2326,6 +2349,52 @@ public abstract class PullRequestDetailPage extends ProjectPage implements PullR
 		super.onDetach();
 	}
 
+	@Override
+	public List<ChatTool> getChatTools() {
+		var pullRequestId = getPullRequest().getId();
+		return List.of(new ChatTool() {
+
+			@Override
+			public ToolSpecification getSpecification() {
+				return ToolSpecification.builder()
+					.name("getCurrentPullRequest")
+					.description("Get info of current pull request in json format")
+					.build();
+			}
+
+			@Override
+			public String execute(JsonNode arguments) {	
+				var pullRequest = pullRequestService.load(pullRequestId);
+				try {
+					return objectMapper.writeValueAsString(PullRequestHelper.getDetail(pullRequest.getProject(), pullRequest));
+				} catch (JsonProcessingException e) {
+					throw new RuntimeException(e);
+				}
+			}
+			
+		}, new ChatTool() {
+
+			@Override
+			public ToolSpecification getSpecification() {
+				return ToolSpecification.builder()
+					.name("getCurrentPullRequestComments")
+					.description("Get comments of current pull request in json format")
+					.build();
+			}
+
+			@Override
+			public String execute(JsonNode arguments) {			
+				var pullRequest = pullRequestService.load(pullRequestId);
+				try {
+					return objectMapper.writeValueAsString(PullRequestHelper.getComments(pullRequest));
+				} catch (JsonProcessingException e) {
+					throw new RuntimeException(e);
+				}
+			}
+			
+		});
+	}
+
 	public static PageParameters paramsOf(PullRequest pullRequest) {
 		return paramsOf(pullRequest.getProject(), pullRequest.getNumber());
 	}

server-core/src/main/java/io/onedev/server/web/page/project/pullrequests/detail/activities/PullRequestActivitiesPage.html

@@ -22,10 +22,11 @@
 		</div>
 	</wicket:fragment>
 	<wicket:fragment wicket:id="optionsFrag">
-		<div class="pull-request-activity-options">
+		<a wicket:id="aiSummarize" t:data-tippy-content="Summarize comments with AI" class="btn btn-xs btn-outline-secondary btn-hover-primary btn-icon"><wicket:svg href="ai-summarize" class="icon"></wicket:svg></a>
-			<a wicket:id="showComments" t:data-tippy-content="Toggle comments" class="btn btn-xs text-muted btn-active-secondary btn-icon"><wicket:svg href="comments" class="icon"></wicket:svg></a>
+		<div class="btn-group">
-			<a wicket:id="showCommits" t:data-tippy-content="Toggle commits" class="btn btn-xs text-muted btn-active-secondary btn-icon"><wicket:svg href="commit" class="icon"></wicket:svg></a>
+			<a wicket:id="showComments" t:data-tippy-content="Toggle comments" class="btn btn-xs text-muted btn-outline-secondary btn-active-secondary btn-icon"><wicket:svg href="comments" class="icon"></wicket:svg></a>
-			<a wicket:id="showChangeHistory" t:data-tippy-content="Toggle change history" class="btn btn-xs text-muted btn-active-secondary btn-icon"><wicket:svg href="history" class="icon"></wicket:svg></a>
+			<a wicket:id="showCommits" t:data-tippy-content="Toggle commits" class="btn btn-xs text-muted btn-outline-secondary btn-active-secondary btn-icon"><wicket:svg href="commit" class="icon"></wicket:svg></a>
+			<a wicket:id="showChangeHistory" t:data-tippy-content="Toggle change history" class="btn btn-xs text-muted btn-outline-secondary btn-active-secondary btn-icon"><wicket:svg href="history" class="icon"></wicket:svg></a>
 		</div>
 	</wicket:fragment>
 </wicket:extend>

server-core/src/main/java/io/onedev/server/web/page/project/pullrequests/detail/activities/PullRequestActivitiesPage.java

@@ -61,6 +61,7 @@ import io.onedev.server.web.ajaxlistener.ConfirmLeaveListener;
 import io.onedev.server.web.behavior.ChangeObserver;
 import io.onedev.server.web.component.comment.CommentInput;
 import io.onedev.server.web.page.base.BasePage;
+import io.onedev.server.web.page.layout.LayoutPage;
 import io.onedev.server.web.page.project.pullrequests.detail.PullRequestDetailPage;
 import io.onedev.server.web.page.project.pullrequests.detail.activities.activity.PullRequestChangeActivity;
 import io.onedev.server.web.page.project.pullrequests.detail.activities.activity.PullRequestCommentActivity;
@@ -409,6 +410,24 @@ public class PullRequestActivitiesPage extends PullRequestDetailPage {
 
 	public Component renderOptions(String componentId) {
 		Fragment fragment = new Fragment(componentId, "optionsFrag", this);
+		
+		fragment.add(new AjaxLink<Void>("aiSummarize") {
+
+			@Override
+			public void onClick(AjaxRequestTarget target) {
+				var page = (LayoutPage)getPage();
+				page.getChatter().show(target, "Summarize comments of current pull request. Display summary in " + getSession().getLocale().getDisplayLanguage());
+			}
+
+			@Override
+			protected void onConfigure() {
+				super.onConfigure();
+				var page = (LayoutPage)getPage();
+				setVisible(!page.getChatter().getEntitledAis().isEmpty());
+			}
+
+		});
+
 		fragment.add(showCommentsLink = new AjaxLink<Void>("showComments") {
 
 			@Override

server-core/src/main/java/io/onedev/server/web/util/ChatToolAware.java

@@ -0,0 +1,11 @@
+package io.onedev.server.web.util;
+
+import java.util.List;
+
+import io.onedev.server.service.support.ChatTool;
+
+public interface ChatToolAware {
+
+    List<ChatTool> getChatTools();
+    
+}