feat: Suggest pull request title/description via AI (OD-2602)

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

@@ -566,7 +566,7 @@ public class McpHelperResource {
 
         createPullRequestInputSchema.put("Type", "object");
         createPullRequestInputSchema.put("Properties", createPullRequestProperties);
-        createPullRequestInputSchema.put("Required", List.of("sourceBranch", "title"));
+        createPullRequestInputSchema.put("Required", List.of("sourceBranch"));
 
         inputSchemas.put("createPullRequest", createPullRequestInputSchema);
 
@@ -1432,13 +1432,6 @@ public class McpHelperResource {
         if (baseCommitId == null)
             throw new NotAcceptableException("No common base for source and target branches");
 
-        var title = (String) data.remove("title");
-        if (title == null)
-            throw new NotAcceptableException("Title is required");
-
-        request.cleanTitle();
-        
-        request.setDescription((String) data.remove("description"));
         request.setTarget(target);
         request.setSource(source);
         request.setSubmitter(SecurityUtils.getUser());
@@ -1461,7 +1454,21 @@ public class McpHelperResource {
         update.setTargetHeadCommitHash(request.getTarget().getObjectName());
         request.getUpdates().add(update);
 
-        request.generateTitleAndDescriptionIfEmpty();
+        var title = (String) data.remove("title");
+        if (title == null)
+            title = request.generateTitleFromCommits();
+        else
+            title = request.cleanTitle(title);
+            
+        if (title == null)
+            title = request.generateTitleFromBranch();
+
+        request.setTitle(title);
+
+        var description = (String) data.remove("description");
+        if (description == null)
+            description = request.generateDescriptionFromCommits();
+        request.setDescription(description);
 
         pullRequestService.checkReviews(request, false);
 

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

@@ -49,7 +49,6 @@ import java.util.Stack;
 import java.util.UUID;
 import java.util.stream.Collectors;
 
-import org.jspecify.annotations.Nullable;
 import javax.persistence.AttributeOverride;
 import javax.persistence.AttributeOverrides;
 import javax.persistence.CascadeType;
@@ -68,6 +67,7 @@ import org.apache.commons.lang3.StringUtils;
 import org.eclipse.jgit.lib.ObjectId;
 import org.eclipse.jgit.revwalk.RevCommit;
 import org.hibernate.annotations.DynamicUpdate;
+import org.jspecify.annotations.Nullable;
 
 import com.fasterxml.jackson.annotation.JsonIgnore;
 import com.fasterxml.jackson.annotation.JsonProperty;
@@ -76,8 +76,6 @@ import com.google.common.collect.Lists;
 
 import io.onedev.server.OneDev;
 import io.onedev.server.attachment.AttachmentStorageSupport;
-import io.onedev.server.service.PullRequestService;
-import io.onedev.server.service.UserService;
 import io.onedev.server.entityreference.EntityReference;
 import io.onedev.server.entityreference.PullRequestReference;
 import io.onedev.server.git.GitUtils;
@@ -96,6 +94,9 @@ import io.onedev.server.model.support.pullrequest.MergeStrategy;
 import io.onedev.server.rest.annotation.Api;
 import io.onedev.server.search.entity.SortField;
 import io.onedev.server.security.SecurityUtils;
+import io.onedev.server.service.PullRequestService;
+import io.onedev.server.service.UserService;
+import io.onedev.server.util.BranchSemantic;
 import io.onedev.server.util.ComponentContext;
 import io.onedev.server.util.ProjectAndBranch;
 import io.onedev.server.web.asset.emoji.Emojis;
@@ -1410,56 +1411,85 @@ public class PullRequest extends ProjectBelonging
 	}
 
 	// Remove issue number suffix if there is any
-	public void cleanTitle() {
+	public String cleanTitle(String title) {
         var cleanedTitle = title.replaceFirst("\\s*\\([a-zA-Z]+-\\d+\\)$", "");
         cleanedTitle = cleanedTitle.replaceFirst("\\s*\\(#\\d+\\)$", "").trim();
         if (cleanedTitle.length() != 0)
-            title = cleanedTitle;
+            return cleanedTitle;
+		else
+			return title;
 	}
 
-	public void generateTitleAndDescriptionIfEmpty() {
+	public BranchSemantic getSourceBranchSemantic() {
-		if (title == null) {
+		var work = getSourceBranch();
-			var commits = getLatestUpdate().getCommits();
+		boolean workInProgress = false;
-			if (commits.size() == 1) {
+		if (work.toLowerCase().startsWith("wip-") 
-				title = commits.get(0).getShortMessage();
+				|| work.toLowerCase().startsWith("wip_") 
-				cleanTitle();
+				|| work.toLowerCase().startsWith("wip/")) {
-			} else {
+			workInProgress = true;
-				title = getSource().getBranch().toLowerCase();
+			work = work.substring(4);
-				boolean wip = false;
+		}
-				if (title.startsWith("wip-") || title.startsWith("wip_") || title.startsWith("wip/")) {
+		var commitTypes = CONVENTIONAL_COMMIT_TYPES;
-					wip = true;
+		var branchProtection = getProject().getBranchProtection(getTargetBranch(), getSubmitter());
-					title = title.substring(4);
+		if (branchProtection.isEnforceConventionalCommits() && !branchProtection.getCommitTypes().isEmpty()) {
-				}
+			commitTypes = branchProtection.getCommitTypes();
-				var commitTypes = CONVENTIONAL_COMMIT_TYPES;
+		}
-				var branchProtection = getProject().getBranchProtection(getTargetBranch(), getSubmitter());
+		String workType = null;
-				if (branchProtection.isEnforceConventionalCommits() && !branchProtection.getCommitTypes().isEmpty()) {
+		for (var commitType: commitTypes) {
-					commitTypes = branchProtection.getCommitTypes();
+			if (work.toLowerCase().startsWith(commitType + "-") 
-				}
+					|| work.toLowerCase().startsWith(commitType + "_") 
-				boolean found = false;
+					|| work.toLowerCase().startsWith(commitType + "/")) {
-				for (var commitType: commitTypes) {
+				workType = commitType;
-					if (title.startsWith(commitType + "-") || title.startsWith(commitType + "_") || title.startsWith(commitType + "/")) {
+				work = work.substring(commitType.length() + 1);
-						title = commitType + ": " + StringUtils.capitalize(title.substring(commitType.length() + 1).replace('-', ' ').replace('_', ' ').replace('/', ' '));
+				break;
-						found = true;
-						break;
-					}
-				}
-				if (!found) {
-					title = StringUtils.capitalize(title.replace('-', ' ').replace('_', ' ').replace('/', ' '));
-				}
-				if (wip)
-					title = "[WIP] " + title;
 			}
 		}
-		if (description == null) {
+		return new BranchSemantic(workInProgress, workType, StringUtils.trimToNull(work));
-			var commits = getLatestUpdate().getCommits();
+	}
-			if (commits.size() == 1) {
+
-				var commit = commits.get(0);
+	public String getTitlePrefix(BranchSemantic sourceBranchSemantic) {
-				var shortMessage = commits.get(0).getShortMessage();
+		var prefixBuilder = new StringBuilder();
-				description = commit.getFullMessage().substring(shortMessage.length()).trim();
+		if (sourceBranchSemantic.isWorkInProgress()) {
-				if (description.length() == 0)
+			prefixBuilder.append("[WIP] ");
-					description = null;
+		}
-			}
+		if (sourceBranchSemantic.getWorkType() != null) {
-		}		
+			prefixBuilder.append(sourceBranchSemantic.getWorkType()).append(": ");
+		}
+		return prefixBuilder.toString();
+	}
+
+	public String generateTitleFromBranch() {
+		var sourceBranchSemantic = getSourceBranchSemantic();
+		var title = getTitlePrefix(sourceBranchSemantic);
+		if (sourceBranchSemantic.getWorkDescription() != null) {
+			title += StringUtils.capitalize(sourceBranchSemantic.getWorkDescription().toLowerCase().replace('-', ' ').replace('_', ' ').replace('/', ' '));
+		}
+		return title.trim();
+	}
+
+	@Nullable
+	public String generateTitleFromCommits() {
+		var commits = getLatestUpdate().getCommits();
+		if (commits.size() == 1) {
+			return cleanTitle(commits.get(0).getShortMessage());
+		} else {
+			return null;
+		}
+	}
+	
+	@Nullable
+	public String generateDescriptionFromCommits() {
+		var commits = getLatestUpdate().getCommits();
+		if (commits.size() == 1) {
+			var commit = commits.get(0);
+			var shortMessage = commit.getShortMessage();
+			var description = commit.getFullMessage().substring(shortMessage.length()).trim();
+			if (description.length() == 0)
+				description = null;
+			return description;
+		} else {
+			return null;
+		}
 	}
 
 }

server-core/src/main/java/io/onedev/server/util/BranchSemantic.java

@@ -0,0 +1,33 @@
+package io.onedev.server.util;
+
+import org.jspecify.annotations.Nullable;
+
+public class BranchSemantic {
+
+    private final boolean workInProgress;
+
+    private final String workType;
+
+    private final String workDescription;
+
+    public BranchSemantic(boolean workInProgress, @Nullable String workType, @Nullable  String workDescription) {
+        this.workInProgress = workInProgress;
+        this.workType = workType;
+        this.workDescription = workDescription;
+    }
+
+    public boolean isWorkInProgress() {
+        return workInProgress;
+    }
+
+    @Nullable
+    public String getWorkType() {
+        return workType;
+    }
+
+    @Nullable
+    public String getWorkDescription() {
+        return workDescription;
+    }
+    
+}

server-core/src/main/java/io/onedev/server/web/behavior/AgentQueryBehavior.java

@@ -30,8 +30,6 @@ import static io.onedev.server.web.translation.Translation._T;
 import static java.util.Collections.sort;
 
 public class AgentQueryBehavior extends ANTLRAssistBehavior {
-
-	private static final String FUZZY_SUGGESTION_DESCRIPTION_PREFIX = "enclose with ~";
 	
 	private final boolean forExecutor;
 	
@@ -188,8 +186,8 @@ public class AgentQueryBehavior extends ANTLRAssistBehavior {
 
 	@Override
 	protected boolean isFuzzySuggestion(InputCompletion suggestion) {
-		return suggestion.getDescription() != null 
+		return suggestion.getLabel().startsWith("~")
-				&& suggestion.getDescription().startsWith(FUZZY_SUGGESTION_DESCRIPTION_PREFIX);
+				&& suggestion.getLabel().endsWith("~");
 	}
 
 }

server-core/src/main/java/io/onedev/server/web/behavior/BuildQueryBehavior.java

@@ -38,8 +38,6 @@ import io.onedev.server.web.behavior.inputassist.NaturalLanguageTranslator;
 import io.onedev.server.web.util.SuggestionUtils;
 
 public class BuildQueryBehavior extends ANTLRAssistBehavior {
-
-	private static final String FUZZY_SUGGESTION_DESCRIPTION_PREFIX = "enclose with ~";
 	
 	private final IModel<Project> projectModel;
 	
@@ -286,8 +284,8 @@ public class BuildQueryBehavior extends ANTLRAssistBehavior {
 
 	@Override
 	protected boolean isFuzzySuggestion(InputCompletion suggestion) {
-		return suggestion.getDescription() != null 
+		return suggestion.getLabel().startsWith("~")
-				&& suggestion.getDescription().startsWith(FUZZY_SUGGESTION_DESCRIPTION_PREFIX);
+				&& suggestion.getLabel().endsWith("~");
 	}
 	
 }

server-core/src/main/java/io/onedev/server/web/behavior/CodeCommentQueryBehavior.java

@@ -30,8 +30,6 @@ import static io.onedev.server.search.entity.codecomment.CodeCommentQueryLexer.*
 import static io.onedev.server.web.translation.Translation._T;
 
 public class CodeCommentQueryBehavior extends ANTLRAssistBehavior {
-
-	private static final String FUZZY_SUGGESTION_DESCRIPTION_PREFIX = "enclose with ~";
 	
 	private final IModel<Project> projectModel;
 	
@@ -175,8 +173,8 @@ public class CodeCommentQueryBehavior extends ANTLRAssistBehavior {
 
 	@Override
 	protected boolean isFuzzySuggestion(InputCompletion suggestion) {
-		return suggestion.getDescription() != null 
+		return suggestion.getLabel().startsWith("~")
-				&& suggestion.getDescription().startsWith(FUZZY_SUGGESTION_DESCRIPTION_PREFIX);
+				&& suggestion.getLabel().endsWith("~");
 	}
 	
 }

server-core/src/main/java/io/onedev/server/web/behavior/CommitQueryBehavior.java

@@ -36,8 +36,6 @@ import io.onedev.server.xodus.CommitInfoService;
 
 public class CommitQueryBehavior extends ANTLRAssistBehavior {
 
-	private static final String FUZZY_SUGGESTION_DESCRIPTION_PREFIX = "enclose with ~";
-	
 	private final IModel<Project> projectModel;
 	
 	private final boolean withCurrentUserCriteria;
@@ -198,8 +196,8 @@ public class CommitQueryBehavior extends ANTLRAssistBehavior {
 
 	@Override
 	protected boolean isFuzzySuggestion(InputCompletion suggestion) {
-		return suggestion.getDescription() != null 
+		return suggestion.getLabel().startsWith("~")
-				&& suggestion.getDescription().startsWith(FUZZY_SUGGESTION_DESCRIPTION_PREFIX);
+				&& suggestion.getLabel().endsWith("~");
 	}
 	
 }

server-core/src/main/java/io/onedev/server/web/behavior/IssueQueryBehavior.java

@@ -109,8 +109,6 @@ import io.onedev.server.web.util.SuggestionUtils;
 import io.onedev.server.web.util.WicketUtils;
 
 public class IssueQueryBehavior extends ANTLRAssistBehavior {
-
-	private static final String FUZZY_SUGGESTION_DESCRIPTION_PREFIX = "enclose with ~";
 	
 	private final IModel<Project> projectModel;
 	
@@ -439,7 +437,8 @@ public class IssueQueryBehavior extends ANTLRAssistBehavior {
 	
 	@Override
 	protected boolean isFuzzySuggestion(InputCompletion suggestion) {
-		return suggestion.getDescription() != null && (suggestion.getDescription().startsWith(FUZZY_SUGGESTION_DESCRIPTION_PREFIX));
+		return suggestion.getLabel().startsWith("~")
+				&& suggestion.getLabel().endsWith("~");
 	}
 	
 	@Override

server-core/src/main/java/io/onedev/server/web/behavior/PackQueryBehavior.java

@@ -33,8 +33,6 @@ import static io.onedev.server.web.translation.Translation._T;
 
 public class PackQueryBehavior extends ANTLRAssistBehavior {
 
-	private static final String FUZZY_SUGGESTION_DESCRIPTION_PREFIX = "enclose with ~";
-	
 	private final IModel<Project> projectModel;
 	
 	private final String packType;
@@ -222,8 +220,8 @@ public class PackQueryBehavior extends ANTLRAssistBehavior {
 
 	@Override
 	protected boolean isFuzzySuggestion(InputCompletion suggestion) {
-		return suggestion.getDescription() != null 
+		return suggestion.getLabel().startsWith("~")
-				&& suggestion.getDescription().startsWith(FUZZY_SUGGESTION_DESCRIPTION_PREFIX);
+				&& suggestion.getLabel().endsWith("~");
 	}
 	
 }

server-core/src/main/java/io/onedev/server/web/behavior/ProjectQueryBehavior.java

@@ -37,8 +37,6 @@ import static io.onedev.server.web.translation.Translation._T;
 
 public class ProjectQueryBehavior extends ANTLRAssistBehavior {
 
-	private static final String FUZZY_SUGGESTION_DESCRIPTION_PREFIX = "enclose with ~";
-	
 	private final boolean childQuery;
 	
 	public ProjectQueryBehavior(boolean childQuery) {
@@ -225,8 +223,8 @@ public class ProjectQueryBehavior extends ANTLRAssistBehavior {
 
 	@Override
 	protected boolean isFuzzySuggestion(InputCompletion suggestion) {
-		return suggestion.getDescription() != null 
+		return suggestion.getLabel().startsWith("~")
-				&& suggestion.getDescription().startsWith(FUZZY_SUGGESTION_DESCRIPTION_PREFIX);
+				&& suggestion.getLabel().endsWith("~");
 	}
 	
 }

server-core/src/main/java/io/onedev/server/web/behavior/PullRequestQueryBehavior.java

@@ -56,8 +56,6 @@ import io.onedev.server.web.behavior.inputassist.NaturalLanguageTranslator;
 import io.onedev.server.web.util.SuggestionUtils;
 
 public class PullRequestQueryBehavior extends ANTLRAssistBehavior {
-
-	private static final String FUZZY_SUGGESTION_DESCRIPTION_PREFIX = "enclose with ~";
 	
 	private final IModel<Project> projectModel;
 	
@@ -270,8 +268,8 @@ public class PullRequestQueryBehavior extends ANTLRAssistBehavior {
 
 	@Override
 	protected boolean isFuzzySuggestion(InputCompletion suggestion) {
-		return suggestion.getDescription() != null 
+		return suggestion.getLabel().startsWith("~")
-				&& suggestion.getDescription().startsWith(FUZZY_SUGGESTION_DESCRIPTION_PREFIX);
+				&& suggestion.getLabel().endsWith("~");
 	}
 	
 	@Override

server-core/src/main/java/io/onedev/server/web/component/markdown/JavascriptTranslations.java

@@ -12,31 +12,31 @@ import io.onedev.server.OneDev;
 public class JavascriptTranslations {
 	
     static String get() {
-		try {
+      try {
-            var map = new HashMap<String, String>();
+              var map = new HashMap<String, String>();
-            
+              
-            map.put("loading", _T("Loading..."));
+              map.put("loading", _T("Loading..."));
-            map.put("loading-emojis", _T("Loading emojis..."));
+              map.put("loading-emojis", _T("Loading emojis..."));
-            map.put("commented-code-outdated", _T("Commented code is outdated"));
+              map.put("commented-code-outdated", _T("Commented code is outdated"));
-            map.put("suggest-changes", _T("Suggest changes")); 
+              map.put("suggest-changes", _T("Suggest changes")); 
-            map.put("upload-should-be-less-than", _T("Upload should be less than {0} Mb"));
+              map.put("upload-should-be-less-than", _T("Upload should be less than {0} Mb"));
-            map.put("uploading-file", _T("Uploading file"));
+              map.put("uploading-file", _T("Uploading file"));
-            map.put("unable-to-connect-to-server", _T("Unable to connect to server"));
+              map.put("unable-to-connect-to-server", _T("Unable to connect to server"));
-            map.put("programming-language", _T("Programming language"));
+              map.put("programming-language", _T("Programming language"));
-            map.put("copy-to-clipboard", _T("Copy to clipboard"));
+              map.put("copy-to-clipboard", _T("Copy to clipboard"));
-            map.put("suggestion-outdated", _T("Suggestion is outdated either due to code change or pull request close"));
+              map.put("suggestion-outdated", _T("Suggestion is outdated either due to code change or pull request close"));
-            map.put("remove-from-batch", _T("Remove from batch"));
+              map.put("remove-from-batch", _T("Remove from batch"));
-            map.put("add-to-batch", _T("Add to batch to commit with other suggestions later"));
+              map.put("add-to-batch", _T("Add to batch to commit with other suggestions later"));
-            map.put("commit-suggestion", _T("Commit suggestion"));
+              map.put("commit-suggestion", _T("Commit suggestion"));
-            map.put("issue-not-exist-or-access-denied", _T("Issue not exist or access denied"));
+              map.put("issue-not-exist-or-access-denied", _T("Issue not exist or access denied"));
-            map.put("pull-request-not-exist-or-access-denied", _T("Pull request not exist or access denied"));
+              map.put("pull-request-not-exist-or-access-denied", _T("Pull request not exist or access denied"));
-            map.put("build-not-exist-or-access-denied", _T("Build not exist or access denied"));
+              map.put("build-not-exist-or-access-denied", _T("Build not exist or access denied"));
-            map.put("commit-not-exist-or-access-denied", _T("Commit not exist or access denied"));
+              map.put("commit-not-exist-or-access-denied", _T("Commit not exist or access denied"));
-            map.put("enter-description-here", _T("Enter description here"));
+              map.put("enter-description-here", _T("Enter description here"));
 
-            return OneDev.getInstance(ObjectMapper.class).writeValueAsString(map);
+              return OneDev.getInstance(ObjectMapper.class).writeValueAsString(map);
-		} catch (JsonProcessingException e) {
+      } catch (JsonProcessingException e) {
-			throw new RuntimeException(e);
+        throw new RuntimeException(e);
-		}
+      }
     }
 }

server-core/src/main/java/io/onedev/server/web/component/symboltooltip/SymbolContext.java

@@ -17,9 +17,9 @@ public class SymbolContext implements Serializable {
 
 	private final List<String> linesAtStart;
 
-	public SymbolContext(String fileName, String symbolLine, 
+	public SymbolContext(String blobPath, String symbolLine, 
             List<String> linesBeforeSymbolLine, List<String> linesAfterSymbolLine, List<String> linesAtStart) {
-		this.blobPath = fileName;
+		this.blobPath = blobPath;
 		this.symbolLine = symbolLine;
 		this.linesBeforeSymbolLine = linesBeforeSymbolLine;
 		this.linesAfterSymbolLine = linesAfterSymbolLine;

server-core/src/main/java/io/onedev/server/web/component/symboltooltip/SymbolTooltipPanel.java

@@ -37,8 +37,10 @@ import com.fasterxml.jackson.databind.ObjectMapper;
 import dev.langchain4j.data.message.SystemMessage;
 import dev.langchain4j.data.message.UserMessage;
 import io.onedev.commons.jsymbol.Symbol;
+import io.onedev.commons.utils.ExplicitException;
 import io.onedev.commons.utils.LinearRange;
 import io.onedev.commons.utils.PlanarRange;
+import io.onedev.server.exception.ExceptionUtils;
 import io.onedev.server.git.Blob;
 import io.onedev.server.git.BlobIdent;
 import io.onedev.server.model.Project;
@@ -59,7 +61,7 @@ import io.onedev.server.web.page.project.blob.render.BlobRenderer;
 
 public abstract class SymbolTooltipPanel extends Panel {
 
-	private static final int QUERY_ENTRIES = 20;
+	private static final int QUERY_ENTRIES = 25;
 
 	private static final int BEFORE_CONTEXT_SIZE = 5;
 
@@ -321,6 +323,7 @@ public abstract class SymbolTooltipPanel extends Panel {
 						mapperCopy.addMixIn(PlanarRange.class, IgnorePlanarRangeMixin.class);
 						mapperCopy.addMixIn(LinearRange.class, IgnoreLinearRangeMixin.class);
 						var jsonOfSymbolHits = mapperCopy.writeValueAsString(symbolHits);
+						
 						var symbolContext = getSymbolContext(symbolPosition, BEFORE_CONTEXT_SIZE, 
 								AFTER_CONTEXT_SIZE, AT_START_CONTEXT_SIZE);
 						var jsonOfSymbolContext = mapperCopy.writeValueAsString(symbolContext);
@@ -349,9 +352,14 @@ public abstract class SymbolTooltipPanel extends Panel {
 						if (index < 0 || index >= symbolHits.size())
 							Session.get().warn("Unable to find most likely definition");
 					} catch (Exception e) {
+						var explicitException = ExceptionUtils.find(e, ExplicitException.class);
+						if (explicitException != null) {
+							Session.get().error(explicitException.getMessage());
+						} else {
+							logger.error("Error inferring most likely symbol definition", e);
+							Session.get().error("Error inferring most likely symbol definition, check server log for details");
+						}
 						index = -1;
-						logger.error("Error inferring most likely symbol definition", e);
-						Session.get().error("Error inferring most likely symbol definition, check server log for details");
 					}					
 					var script = String.format("onedev.server.symboltooltip.doneInfer('%s', %d);", 
 							getMarkupId() + "-symbol-tooltip", index);

server-core/src/main/java/io/onedev/server/web/page/project/pullrequests/create/NewPullRequestPage.html

@@ -67,13 +67,13 @@
 		<div class="card can-send mb-5">
 			<div class="card-body">
 				<form wicket:id="form" class="leave-confirm">
-					<div class="form-group">
+					<div class="form-group pull-request-title">
 						<label><wicket:t>Title</wicket:t> <span class="text-danger">*</span></label>
 						<input wicket:id="title" type="text" class="form-control">
 						<div wicket:id="titleFeedback"></div>
 						<div class="text-muted form-text"><wicket:t>Prefix the title with <code>WIP</code> or <code>[WIP]</code> to mark the pull request as work in progress</wicket:t></div>
 					</div>
-					<div class="form-group">
+					<div class="form-group pull-request-description">
 						<label><wicket:t>Description</wicket:t></label>
 						<div wicket:id="description"></div>						
 						<div wicket:id="descriptionFeedback"></div>

server-core/src/main/java/io/onedev/server/web/page/project/pullrequests/create/NewPullRequestPage.java

@@ -1,7 +1,11 @@
 package io.onedev.server.web.page.project.pullrequests.create;
 
+import static io.onedev.server.model.PullRequest.MAX_DESCRIPTION_LEN;
+import static io.onedev.server.model.PullRequest.MAX_TITLE_LEN;
 import static io.onedev.server.search.commit.Revision.Type.COMMIT;
 import static io.onedev.server.web.translation.Translation._T;
+import static org.apache.wicket.ajax.attributes.CallbackParameter.explicit;
+import static org.unbescape.javascript.JavaScriptEscape.escapeJavaScript;
 
 import java.text.MessageFormat;
 import java.util.ArrayList;
@@ -16,10 +20,11 @@ import java.util.Set;
 import java.util.concurrent.atomic.AtomicReference;
 import java.util.stream.Collectors;
 
-import org.jspecify.annotations.Nullable;
+import javax.inject.Inject;
 
 import org.apache.wicket.Component;
 import org.apache.wicket.RestartResponseAtInterceptPageException;
+import org.apache.wicket.Session;
 import org.apache.wicket.ajax.AjaxRequestTarget;
 import org.apache.wicket.ajax.attributes.AjaxRequestAttributes;
 import org.apache.wicket.ajax.form.OnChangeAjaxBehavior;
@@ -27,8 +32,9 @@ import org.apache.wicket.ajax.markup.html.AjaxLink;
 import org.apache.wicket.behavior.AttributeAppender;
 import org.apache.wicket.extensions.ajax.markup.html.AjaxLazyLoadPanel;
 import org.apache.wicket.feedback.FencedFeedbackPanel;
-import org.apache.wicket.markup.head.CssHeaderItem;
 import org.apache.wicket.markup.head.IHeaderResponse;
+import org.apache.wicket.markup.head.JavaScriptHeaderItem;
+import org.apache.wicket.markup.head.OnLoadHeaderItem;
 import org.apache.wicket.markup.html.WebMarkupContainer;
 import org.apache.wicket.markup.html.basic.Label;
 import org.apache.wicket.markup.html.form.Button;
@@ -47,9 +53,17 @@ import org.apache.wicket.request.cycle.RequestCycle;
 import org.apache.wicket.request.mapper.parameter.PageParameters;
 import org.eclipse.jgit.lib.ObjectId;
 import org.eclipse.jgit.revwalk.RevCommit;
+import org.jspecify.annotations.Nullable;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
 import com.google.common.collect.Lists;
 
+import dev.langchain4j.data.message.SystemMessage;
+import dev.langchain4j.data.message.UserMessage;
+import io.onedev.commons.utils.ExplicitException;
 import io.onedev.commons.utils.PlanarRange;
 import io.onedev.server.OneDev;
 import io.onedev.server.attachment.AttachmentSupport;
@@ -58,11 +72,7 @@ import io.onedev.server.codequality.CodeProblem;
 import io.onedev.server.codequality.CodeProblemContribution;
 import io.onedev.server.codequality.CoverageStatus;
 import io.onedev.server.codequality.LineCoverageContribution;
-import io.onedev.server.service.CodeCommentService;
+import io.onedev.server.exception.ExceptionUtils;
-import io.onedev.server.service.CodeCommentReplyService;
-import io.onedev.server.service.CodeCommentStatusChangeService;
-import io.onedev.server.service.LabelSpecService;
-import io.onedev.server.service.PullRequestService;
 import io.onedev.server.git.GitUtils;
 import io.onedev.server.git.service.GitService;
 import io.onedev.server.git.service.RefFacade;
@@ -87,10 +97,17 @@ import io.onedev.server.search.commit.CommitQuery;
 import io.onedev.server.search.commit.Revision;
 import io.onedev.server.search.commit.RevisionCriteria;
 import io.onedev.server.security.SecurityUtils;
+import io.onedev.server.service.CodeCommentReplyService;
+import io.onedev.server.service.CodeCommentService;
+import io.onedev.server.service.CodeCommentStatusChangeService;
+import io.onedev.server.service.LabelSpecService;
+import io.onedev.server.service.PullRequestService;
+import io.onedev.server.service.SettingService;
 import io.onedev.server.util.Pair;
 import io.onedev.server.util.ProjectAndBranch;
 import io.onedev.server.util.diff.WhitespaceOption;
 import io.onedev.server.web.ajaxlistener.DisableGlobalAjaxIndicatorListener;
+import io.onedev.server.web.behavior.AbstractPostAjaxBehavior;
 import io.onedev.server.web.behavior.ReferenceInputBehavior;
 import io.onedev.server.web.component.branch.BranchLink;
 import io.onedev.server.web.component.branch.picker.AffinalBranchPicker;
@@ -119,10 +136,18 @@ import io.onedev.server.web.util.editbean.LabelsBean;
 
 public class NewPullRequestPage extends ProjectPage implements RevisionAnnotationSupport {
 
+	private static final Logger logger = LoggerFactory.getLogger(NewPullRequestPage.class);
+	
 	private static final String TABS_ID = "tabs";
 	
 	private static final String TAB_PANEL_ID = "tabPanel";
 	
+	@Inject
+	private SettingService settingService;
+
+	@Inject
+	private ObjectMapper objectMapper;
+	
 	private ProjectAndBranch target;
 	
 	private ProjectAndBranch source;
@@ -262,7 +287,11 @@ public class NewPullRequestPage extends ProjectPage implements RevisionAnnotatio
 				update.setHeadCommitHash(source.getObjectName());
 				update.setTargetHeadCommitHash(request.getTarget().getObjectName());
 
-				request.generateTitleAndDescriptionIfEmpty();
+				var title = request.generateTitleFromCommits();
+				if (title == null && settingService.getAISetting().getLiteModelSetting() == null)
+					title = request.generateTitleFromBranch();
+				request.setTitle(title);
+				request.setDescription(request.generateDescriptionFromCommits());
 
 				getPullRequestService().checkReviews(request, false);
 
@@ -645,7 +674,140 @@ public class NewPullRequestPage extends ProjectPage implements RevisionAnnotatio
 	}
 	
 	private Fragment newCanSendFrag() {
-		Fragment fragment = new Fragment("status", "canSendFrag", this);
+		var behavior = new AbstractPostAjaxBehavior() {
+
+			@Override
+			protected void respond(AjaxRequestTarget target) {
+				var params = RequestCycle.get().getRequest().getPostParameters();
+				var suggestTitle = params.getParameterValue("suggestTitle").toBoolean();
+				var suggestDescription = params.getParameterValue("suggestDescription").toBoolean();
+
+				String title;
+				String description;
+				try {
+					if (suggestTitle || suggestDescription) {
+						var chatModel = settingService.getAISetting().getLiteModel();
+						var sourceBranchSemantic = getPullRequest().getSourceBranchSemantic();
+						String titleSuggestInstruction;
+						if (sourceBranchSemantic.isWorkInProgress()) {
+							if (sourceBranchSemantic.getWorkType() != null) {
+								titleSuggestInstruction = """
+									When suggesting pull request title, you should not add work in progress prefix
+									or conventional commit type prefix to the title even if commit messages 
+									indicate that.
+									""";
+							} else {
+								titleSuggestInstruction = """
+									When suggesting pull request title, you should not add work in progress prefix
+									to the title even if commit messages indicate that. 
+									""";
+							}
+						} else {
+							if (sourceBranchSemantic.getWorkType() != null) {
+								titleSuggestInstruction = """
+									When suggesting pull request title, you should not add conventional commit type prefix
+									to the title even if commit messages indicate that.
+									""";
+							} else {
+								titleSuggestInstruction = "";
+							}
+						}
+
+						var userPrompt = getPullRequest().getLatestUpdate().getCommits().stream()
+								.map(it -> it.getFullMessage())
+								.collect(Collectors.toList());
+						var userMessage = new UserMessage("A json array of commit messages:\n" + objectMapper.writeValueAsString(userPrompt));
+						if (!suggestTitle) {
+							var systemMessage = new SystemMessage(String.format("""
+								You are a helpful assistant that can suggest pull request description by 
+								summarizing multiple commit messages. Maximum %d characters allowed for 
+								the description.
+								
+								IMPORTANT: only return the description, no other text or comments.
+								""", MAX_DESCRIPTION_LEN));								
+							description = chatModel.chat(systemMessage, userMessage).aiMessage().text();
+							title = "";
+						} else if (!suggestDescription) {
+							var systemMessage = new SystemMessage(String.format("""
+								You are a helpful assistant that can suggest pull request title by summarizing 
+								multiple commit messages. %s Maximum %d characters allowed for the title. 
+
+								IMPORTANT: only return the title, no other text or comments.
+								""", titleSuggestInstruction, MAX_TITLE_LEN));			
+							title = (getPullRequest().getTitlePrefix(sourceBranchSemantic) + chatModel.chat(systemMessage, userMessage).aiMessage().text()).trim();
+							description = "";
+						} else {
+							var systemMessage = new SystemMessage(String.format("""
+								You are a helpful assistant that can suggest pull request title and description 
+								by summarizing multiple commit messages. %s Maximum %d characters allowed for the title, 
+								and %d characters allowed for the description.
+
+								IMPORTANT: only return a VALID json object with "title" property set to the title and "description" 
+								property set to the description, no other text or comments.
+								""", titleSuggestInstruction, MAX_TITLE_LEN, MAX_DESCRIPTION_LEN));								
+							var responseText = chatModel.chat(systemMessage, userMessage).aiMessage().text();
+							if (responseText.startsWith("```json"))
+								responseText = responseText.substring("```json".length());
+							if (responseText.endsWith("```"))
+								responseText = responseText.substring(0, responseText.length() - "```".length());
+							var response = objectMapper.readTree(responseText);
+							if (response.has("title")) {
+								title = (getPullRequest().getTitlePrefix(sourceBranchSemantic) + response.get("title").asText()).trim();
+							} else {
+								title = "";
+							}
+							if (response.has("description"))
+								description = response.get("description").asText();
+							else
+								description = "";
+						}
+					} else {
+						title = "";
+						description = "";						
+					}
+				} catch (Exception e) {
+					title = "";
+					description = "";
+					var explicitException = ExceptionUtils.find(e, ExplicitException.class);
+					if (explicitException != null) {
+						Session.get().error(explicitException.getMessage());
+					} else {
+						logger.error("Error suggesting title/description", e);
+						Session.get().error("Error suggesting title/description, check server log for details");
+					}
+				}
+				var script = String.format("onedev.server.newPullRequest.titleAndDescriptionSuggested('%s', '%s');", 
+						escapeJavaScript(title), escapeJavaScript(description));
+				target.appendJavaScript(script);
+			}
+
+		};
+		Fragment fragment = new Fragment("status", "canSendFrag", this) {
+
+			@Override
+			public void renderHead(IHeaderResponse response) {
+				super.renderHead(response);
+				
+				CharSequence callback;
+				if (settingService.getAISetting().getLiteModelSetting() != null)
+					callback = behavior.getCallbackFunction(explicit("suggestTitle"), explicit("suggestDescription"));
+				else
+					callback = "undefined";
+				var translations = new HashMap<String, String>();
+				translations.put("suggesting-title", _T("Suggesting title..."));
+				translations.put("suggesting-description", _T("Suggesting description..."));
+				try {
+					var script = String.format("onedev.server.newPullRequest.onCanSendLoad(%s, %s);", 
+							callback, objectMapper.writeValueAsString(translations));
+					response.render(OnLoadHeaderItem.forScript(script));
+				} catch (JsonProcessingException e) {
+					throw new RuntimeException(e);
+				}
+			}
+
+		};
+		fragment.add(behavior);
+
 		Form<?> form = new Form<Void>("form");
 		fragment.add(form);
 		
@@ -763,7 +925,7 @@ public class NewPullRequestPage extends ProjectPage implements RevisionAnnotatio
 			
 		};
 		descriptionInput.add(validatable -> {
-			if (validatable.getValue().length() > PullRequest.MAX_DESCRIPTION_LEN) {
+			if (validatable.getValue().length() > MAX_DESCRIPTION_LEN) {
 				validatable.error(messageSource -> _T("Description too long"));
 			}
 		});
@@ -943,7 +1105,7 @@ public class NewPullRequestPage extends ProjectPage implements RevisionAnnotatio
 	@Override
 	public void renderHead(IHeaderResponse response) {
 		super.renderHead(response);
-		response.render(CssHeaderItem.forReference(new NewPullRequestCssResourceReference()));
+		response.render(JavaScriptHeaderItem.forReference(new NewPullRequestResourceReference()));
 	}
 
 	@Override

server-core/src/main/java/io/onedev/server/web/page/project/pullrequests/create/NewPullRequestResourceReference.java

@@ -7,18 +7,21 @@ import org.apache.wicket.markup.head.HeaderItem;
 
 import io.onedev.server.web.asset.revisioncompare.RevisionCompareCssResourceReference;
 import io.onedev.server.web.page.base.BaseDependentCssResourceReference;
+import io.onedev.server.web.page.base.BaseDependentResourceReference;
 
-public class NewPullRequestCssResourceReference extends BaseDependentCssResourceReference {
+public class NewPullRequestResourceReference extends BaseDependentResourceReference {
 
 	private static final long serialVersionUID = 1L;
 
-	public NewPullRequestCssResourceReference() {
+	public NewPullRequestResourceReference() {
-		super(NewPullRequestCssResourceReference.class, "new-pull-request.css");
+		super(NewPullRequestResourceReference.class, "new-pull-request.js");
 	}
 
 	@Override
 	public List<HeaderItem> getDependencies() {
 		List<HeaderItem> dependencies = super.getDependencies();
+		dependencies.add(CssHeaderItem.forReference(new BaseDependentCssResourceReference(
+			NewPullRequestResourceReference.class, "new-pull-request.css")));
 		dependencies.add(CssHeaderItem.forReference(new RevisionCompareCssResourceReference()));
 		return dependencies;
 	}

server-core/src/main/java/io/onedev/server/web/page/project/pullrequests/create/new-pull-request.js

@@ -0,0 +1,83 @@
+onedev.server.newPullRequest = {    
+    onCanSendLoad: function(titleAndDescriptionSuggestionCallback, translations) {
+        // Do below logic in onLoad as unsaved description will be set in onLoad event of markdown editor, 
+        // and we do not want to suggest description if unsaved description is loaded
+        if (titleAndDescriptionSuggestionCallback) {
+            var icon = onedev.server.isDarkMode()? "sparkle.gif": "sparkle-dark.gif";
+            var indicatorHtml = "<div class='ajax-loading-indicator suggesting-indicator'><img src='/~img/" + icon + "' width='16' height='16'></div>";
+
+            var $title = $(".pull-request-title");
+            var $titleInput = $title.find("input");
+            if ($titleInput.val().length == 0) {
+                $title.css("position", "relative");
+                $titleInput.prop("readonly", true);
+                $titleInput.data("placeholder", $titleInput.attr("placeholder"));
+                $titleInput.removeAttr("placeholder");
+                
+                var $indicator = $(indicatorHtml);
+                $indicator.append("<span class='text-muted'>" + translations["suggesting-title"] + "</span>");
+    
+                var titleCoord = $title.offset();
+                var titleInputCoord = $titleInput.offset();
+                var left = titleInputCoord.left - titleCoord.left + 5;
+                var top = titleInputCoord.top - titleCoord.top + 10;
+        
+                $indicator.css({
+                    position: "absolute",
+                    left: left + "px",
+                    top: top + "px",
+                    zIndex: 1000
+                });    
+                $title.append($indicator);
+            }
+
+            var $description = $(".pull-request-description");
+            var $descriptionInput = $description.find("textarea");
+            if ($descriptionInput.val().length == 0) {
+                $description.css("position", "relative");
+                $descriptionInput.prop("readonly", true);
+    
+                $indicator = $(indicatorHtml);
+                $indicator.append("<span class='text-muted'>" + translations["suggesting-description"] + "</span>");
+    
+                var descriptionCoord = $description.offset();
+                var descriptionInputCoord = $descriptionInput.offset();
+                var left = descriptionInputCoord.left - descriptionCoord.left + 5;
+                var top = descriptionInputCoord.top - descriptionCoord.top + 10;
+        
+                $indicator.css({
+                    position: "absolute",
+                    left: left + "px",
+                    top: top + "px",
+                    zIndex: 1000
+                });    
+                $description.append($indicator);    
+            }
+            
+            titleAndDescriptionSuggestionCallback($titleInput.val().length == 0, $descriptionInput.val().length == 0);
+        }
+    },
+    titleAndDescriptionSuggested: function(title, description) {
+        var $title = $(".pull-request-title");    
+        var $titleInput = $title.find("input");
+		$titleInput.prop("readonly", false);
+		$title.children(".suggesting-indicator").remove();
+        var placeholder = $titleInput.data("placeholder");
+        if (placeholder)
+            $titleInput.attr("placeholder", placeholder);
+
+        if (title)
+            $titleInput.val(title);
+
+        var $description = $(".pull-request-description");
+        var $descriptionInput = $description.find("textarea");
+        $descriptionInput.prop("readonly", false);
+        $description.children(".suggesting-indicator").remove();
+
+        if (description) {
+            $descriptionInput.val(description);
+            $descriptionInput.trigger("input");
+        }
+    }
+
+}