diff --git a/src/main/java/com/googlesource/gerrit/plugins/hooks/AgreementSignup.java b/src/main/java/com/googlesource/gerrit/plugins/hooks/AgreementSignup.java
index 3953bf6..0eb9b6f 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/hooks/AgreementSignup.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/hooks/AgreementSignup.java
@@ -21,7 +21,7 @@
 
 @Singleton
 class AgreementSignup implements AgreementSignupListener {
-  private final AsynchronousHook hook;
+  private final Hook hook;
   private final HookFactory hookFactory;
 
   @Inject
@@ -40,7 +40,7 @@
       args.add("--user-id", submitter._accountId);
       args.add("--cla-name", event.getAgreementName());
 
-      hook.submit(args);
+      hook.execute(args);
     }
   }
 }
diff --git a/src/main/java/com/googlesource/gerrit/plugins/hooks/AsynchronousHook.java b/src/main/java/com/googlesource/gerrit/plugins/hooks/AsynchronousHook.java
index c581642..4e74ece 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/hooks/AsynchronousHook.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/hooks/AsynchronousHook.java
@@ -16,7 +16,7 @@
 
 import java.nio.file.Path;
 
-public class AsynchronousHook extends Hook {
+class AsynchronousHook extends Hook {
   private final HookQueue queue;
 
   AsynchronousHook(HookQueue queue, Path path) {
@@ -24,11 +24,15 @@
     this.queue = queue;
   }
 
-  void submit(HookArgs args) {
+  @Override
+  HookResult execute(HookArgs args) {
     queue.submit(path, args);
+    return null;
   }
 
-  void submit(String projectName, HookArgs args) {
+  @Override
+  HookResult execute(String projectName, HookArgs args) {
     queue.submit(projectName, path, args);
+    return null;
   }
 }
diff --git a/src/main/java/com/googlesource/gerrit/plugins/hooks/ChangeAbandoned.java b/src/main/java/com/googlesource/gerrit/plugins/hooks/ChangeAbandoned.java
index 19e6753..20ace66 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/hooks/ChangeAbandoned.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/hooks/ChangeAbandoned.java
@@ -21,7 +21,7 @@
 
 @Singleton
 class ChangeAbandoned implements ChangeAbandonedListener {
-  private final AsynchronousHook hook;
+  private final Hook hook;
   private final HookFactory hookFactory;
 
   @Inject
@@ -45,6 +45,6 @@
     args.add("--commit", c.currentRevision);
     args.add("--reason", event.getReason());
 
-    hook.submit(c.project, args);
+    hook.execute(c.project, args);
   }
 }
diff --git a/src/main/java/com/googlesource/gerrit/plugins/hooks/ChangeMerged.java b/src/main/java/com/googlesource/gerrit/plugins/hooks/ChangeMerged.java
index 6e28143..6ef03e0 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/hooks/ChangeMerged.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/hooks/ChangeMerged.java
@@ -21,7 +21,7 @@
 
 @Singleton
 class ChangeMerged implements ChangeMergedListener {
-  private final AsynchronousHook hook;
+  private final Hook hook;
   private final HookFactory hookFactory;
 
   @Inject
@@ -45,6 +45,6 @@
     args.add("--commit", c.currentRevision);
     args.add("--newrev", event.getNewRevisionId());
 
-    hook.submit(c.project, args);
+    hook.execute(c.project, args);
   }
 }
diff --git a/src/main/java/com/googlesource/gerrit/plugins/hooks/ChangeRestored.java b/src/main/java/com/googlesource/gerrit/plugins/hooks/ChangeRestored.java
index af0f9a8..27b1c07 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/hooks/ChangeRestored.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/hooks/ChangeRestored.java
@@ -21,7 +21,7 @@
 
 @Singleton
 class ChangeRestored implements ChangeRestoredListener {
-  private final AsynchronousHook hook;
+  private final Hook hook;
   private final HookFactory hookFactory;
 
   @Inject
@@ -45,6 +45,6 @@
     args.add("--commit", c.currentRevision);
     args.add("--reason", event.getReason());
 
-    hook.submit(c.project, args);
+    hook.execute(c.project, args);
   }
 }
diff --git a/src/main/java/com/googlesource/gerrit/plugins/hooks/CommentAdded.java b/src/main/java/com/googlesource/gerrit/plugins/hooks/CommentAdded.java
index cea65d1..531f0ce 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/hooks/CommentAdded.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/hooks/CommentAdded.java
@@ -21,7 +21,7 @@
 
 @Singleton
 class CommentAdded implements CommentAddedListener {
-  private final AsynchronousHook hook;
+  private final Hook hook;
   private final HookFactory hookFactory;
 
   @Inject
@@ -47,6 +47,6 @@
     args.add("--comment", event.getComment());
     args.addApprovals(event.getApprovals(), event.getOldApprovals());
 
-    hook.submit(c.project, args);
+    hook.execute(c.project, args);
   }
 }
diff --git a/src/main/java/com/googlesource/gerrit/plugins/hooks/CommitReceived.java b/src/main/java/com/googlesource/gerrit/plugins/hooks/CommitReceived.java
index 02800fc..73b5ff5 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/hooks/CommitReceived.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/hooks/CommitReceived.java
@@ -25,7 +25,7 @@
 import org.eclipse.jgit.lib.ObjectId;
 
 public class CommitReceived implements CommitValidationListener {
-  private final SynchronousHook hook;
+  private final Hook hook;
   private final HookFactory hookFactory;
 
   @Inject
@@ -49,11 +49,12 @@
     args.add("--project", projectName);
     args.add("--refname", refname);
     args.add("--uploader", receiveEvent.user.getNameEmail());
+    args.add("--uploader-username", receiveEvent.user.getUserName());
     args.add("--oldrev", old.name());
     args.add("--newrev", receiveEvent.commit.name());
     args.add("--cmdref", commandRef);
 
-    HookResult result = hook.run(projectName, args);
+    HookResult result = hook.execute(projectName, args);
     if (result != null) {
       String output = result.toString();
       if (result.getExitValue() != 0) {
diff --git a/src/main/java/com/googlesource/gerrit/plugins/hooks/DraftPublished.java b/src/main/java/com/googlesource/gerrit/plugins/hooks/DraftPublished.java
index 7ae68f2..8fe8cde 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/hooks/DraftPublished.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/hooks/DraftPublished.java
@@ -21,7 +21,7 @@
 
 @Singleton
 class DraftPublished implements DraftPublishedListener {
-  private final AsynchronousHook hook;
+  private final Hook hook;
   private final HookFactory hookFactory;
 
   @Inject
@@ -45,6 +45,6 @@
     args.add("--commit", event.getRevision().commit.commit);
     args.add("--patchset", event.getRevision()._number);
 
-    hook.submit(c.project, args);
+    hook.execute(c.project, args);
   }
 }
diff --git a/src/main/java/com/googlesource/gerrit/plugins/hooks/GitReferenceUpdated.java b/src/main/java/com/googlesource/gerrit/plugins/hooks/GitReferenceUpdated.java
index cf1a10d..07fff1e 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/hooks/GitReferenceUpdated.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/hooks/GitReferenceUpdated.java
@@ -20,7 +20,7 @@
 
 @Singleton
 class GitReferenceUpdated implements GitReferenceUpdatedListener {
-  private final AsynchronousHook hook;
+  private final Hook hook;
   private final HookFactory hookFactory;
 
   @Inject
@@ -39,6 +39,6 @@
     args.add("--project", event.getProjectName());
     args.add("--submitter", event.getUpdater());
 
-    hook.submit(event.getProjectName(), args);
+    hook.execute(event.getProjectName(), args);
   }
 }
diff --git a/src/main/java/com/googlesource/gerrit/plugins/hooks/HashtagsEdited.java b/src/main/java/com/googlesource/gerrit/plugins/hooks/HashtagsEdited.java
index 9bb40c1..7735b38 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/hooks/HashtagsEdited.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/hooks/HashtagsEdited.java
@@ -22,7 +22,7 @@
 
 @Singleton
 class HashtagsEdited implements HashtagsEditedListener {
-  private final AsynchronousHook hook;
+  private final Hook hook;
   private final HookFactory hookFactory;
 
   @Inject
@@ -45,7 +45,7 @@
     add(args, "--added", event.getAddedHashtags());
     add(args, "--removed", event.getRemovedHashtags());
 
-    hook.submit(c.project, args);
+    hook.execute(c.project, args);
   }
 
   private void add(HookArgs args, String name, Collection<String> hashtags) {
diff --git a/src/main/java/com/googlesource/gerrit/plugins/hooks/Hook.java b/src/main/java/com/googlesource/gerrit/plugins/hooks/Hook.java
index 87fb4f4..fc84b9e 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/hooks/Hook.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/hooks/Hook.java
@@ -14,12 +14,17 @@
 
 package com.googlesource.gerrit.plugins.hooks;
 
+import com.google.gerrit.common.Nullable;
 import java.nio.file.Path;
 
-public class Hook {
+abstract class Hook {
   protected final Path path;
 
   Hook(Path path) {
     this.path = path;
   }
+
+  abstract @Nullable HookResult execute(HookArgs args);
+
+  abstract @Nullable HookResult execute(String projectName, HookArgs args);
 }
diff --git a/src/main/java/com/googlesource/gerrit/plugins/hooks/HookArgs.java b/src/main/java/com/googlesource/gerrit/plugins/hooks/HookArgs.java
index 5379239..e3febaa 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/hooks/HookArgs.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/hooks/HookArgs.java
@@ -25,12 +25,17 @@
 import com.google.gerrit.server.IdentifiedUser;
 import com.google.gerrit.server.config.SitePaths;
 import com.google.gerrit.server.git.GitRepositoryManager;
+import com.google.inject.Inject;
 import com.google.inject.Provider;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Map;
 
 class HookArgs {
+  interface Factory {
+    HookArgs create();
+  }
+
   final IdentifiedUser.GenericFactory identifiedUserFactory;
   final Provider<String> urlProvider;
   final HookMetrics metrics;
@@ -39,6 +44,7 @@
 
   private final List<String> args;
 
+  @Inject
   HookArgs(
       IdentifiedUser.GenericFactory identifiedUserFactory,
       Provider<String> urlProvider,
@@ -82,6 +88,8 @@
     if (account != null) {
       args.add(name);
       args.add(format(account));
+
+      add(name + "-username", account.username);
     }
   }
 
diff --git a/src/main/java/com/googlesource/gerrit/plugins/hooks/HookFactory.java b/src/main/java/com/googlesource/gerrit/plugins/hooks/HookFactory.java
index 2969358..c3ca6e1 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/hooks/HookFactory.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/hooks/HookFactory.java
@@ -16,14 +16,9 @@
 
 import static com.google.common.base.MoreObjects.firstNonNull;
 
-import com.google.gerrit.common.Nullable;
-import com.google.gerrit.server.IdentifiedUser;
-import com.google.gerrit.server.config.CanonicalWebUrl;
 import com.google.gerrit.server.config.GerritServerConfig;
 import com.google.gerrit.server.config.SitePaths;
-import com.google.gerrit.server.git.GitRepositoryManager;
 import com.google.inject.Inject;
-import com.google.inject.Provider;
 import com.google.inject.Singleton;
 import java.nio.file.Path;
 import java.nio.file.Paths;
@@ -34,31 +29,20 @@
   private final HookQueue queue;
   private final HookExecutor syncHookExecutor;
   private final Config config;
-  private final IdentifiedUser.GenericFactory identifiedUserFactory;
-  private final HookMetrics metrics;
-  private final Provider<String> urlProvider;
   private final Path hooksPath;
-  private final GitRepositoryManager gitManager;
-  private final SitePaths sitePaths;
+  private final HookArgs.Factory argsFactory;
 
   @Inject
   HookFactory(
       HookQueue queue,
       HookExecutor syncHookExecutor,
       @GerritServerConfig Config config,
-      IdentifiedUser.GenericFactory identifiedUserFactory,
-      @CanonicalWebUrl @Nullable Provider<String> urlProvider,
-      HookMetrics metrics,
       SitePaths sitePaths,
-      GitRepositoryManager gitManager) {
+      HookArgs.Factory argsFactory) {
     this.queue = queue;
     this.syncHookExecutor = syncHookExecutor;
     this.config = config;
-    this.identifiedUserFactory = identifiedUserFactory;
-    this.metrics = metrics;
-    this.urlProvider = urlProvider;
-    this.gitManager = gitManager;
-    this.sitePaths = sitePaths;
+    this.argsFactory = argsFactory;
 
     String v = config.getString("hooks", null, "path");
     if (v != null) {
@@ -73,15 +57,15 @@
     return hooksPath.resolve(firstNonNull(v, defaultName));
   }
 
-  public AsynchronousHook createAsync(String configName, String defaultName) {
+  public Hook createAsync(String configName, String defaultName) {
     return new AsynchronousHook(queue, getHookPath(configName, defaultName));
   }
 
-  public SynchronousHook createSync(String configName, String defaultName) {
+  public Hook createSync(String configName, String defaultName) {
     return new SynchronousHook(syncHookExecutor, getHookPath(configName, defaultName));
   }
 
   public HookArgs createArgs() {
-    return new HookArgs(identifiedUserFactory, urlProvider, metrics, gitManager, sitePaths);
+    return argsFactory.create();
   }
 }
diff --git a/src/main/java/com/googlesource/gerrit/plugins/hooks/HookQueue.java b/src/main/java/com/googlesource/gerrit/plugins/hooks/HookQueue.java
index 6a5e33e..bc7e5eb 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/hooks/HookQueue.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/hooks/HookQueue.java
@@ -19,11 +19,12 @@
 import com.google.inject.Inject;
 import java.nio.file.Files;
 import java.nio.file.Path;
+import java.util.concurrent.ScheduledExecutorService;
 
 class HookQueue implements LifecycleListener {
   private final WorkQueue workQueue;
 
-  private WorkQueue.Executor queue;
+  private ScheduledExecutorService queue;
 
   @Inject
   HookQueue(WorkQueue queue) {
@@ -48,7 +49,6 @@
   @Override
   public void stop() {
     if (queue != null) {
-      queue.unregisterWorkQueue();
       queue.shutdownNow();
       queue = null;
     }
diff --git a/src/main/java/com/googlesource/gerrit/plugins/hooks/Module.java b/src/main/java/com/googlesource/gerrit/plugins/hooks/Module.java
index 2dcce56..427d15b 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/hooks/Module.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/hooks/Module.java
@@ -14,6 +14,7 @@
 
 package com.googlesource.gerrit.plugins.hooks;
 
+import com.google.gerrit.extensions.config.FactoryModule;
 import com.google.gerrit.extensions.events.AgreementSignupListener;
 import com.google.gerrit.extensions.events.ChangeAbandonedListener;
 import com.google.gerrit.extensions.events.ChangeMergedListener;
@@ -31,11 +32,10 @@
 import com.google.gerrit.extensions.registration.DynamicSet;
 import com.google.gerrit.server.git.validators.CommitValidationListener;
 import com.google.gerrit.server.git.validators.RefOperationValidationListener;
-import com.google.inject.AbstractModule;
 import com.google.inject.Scopes;
 import com.google.inject.internal.UniqueAnnotations;
 
-class Module extends AbstractModule {
+class Module extends FactoryModule {
   @Override
   protected void configure() {
     bind(HookQueue.class).in(Scopes.SINGLETON);
@@ -43,6 +43,8 @@
     bind(HookExecutor.class).in(Scopes.SINGLETON);
     bind(LifecycleListener.class).annotatedWith(UniqueAnnotations.create()).to(HookExecutor.class);
 
+    factory(HookArgs.Factory.class);
+
     DynamicSet.bind(binder(), AgreementSignupListener.class).to(AgreementSignup.class);
     DynamicSet.bind(binder(), ChangeAbandonedListener.class).to(ChangeAbandoned.class);
     DynamicSet.bind(binder(), ChangeMergedListener.class).to(ChangeMerged.class);
diff --git a/src/main/java/com/googlesource/gerrit/plugins/hooks/NewProjectCreated.java b/src/main/java/com/googlesource/gerrit/plugins/hooks/NewProjectCreated.java
index 5ff73f7..0cf0e88 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/hooks/NewProjectCreated.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/hooks/NewProjectCreated.java
@@ -20,7 +20,7 @@
 
 @Singleton
 class NewProjectCreated implements NewProjectCreatedListener {
-  private final AsynchronousHook hook;
+  private final Hook hook;
   private final HookFactory hookFactory;
 
   @Inject
@@ -34,6 +34,6 @@
     HookArgs args = hookFactory.createArgs();
     args.add("--project", event.getProjectName());
     args.add("--head", event.getHeadName());
-    hook.submit(event.getProjectName(), args);
+    hook.execute(event.getProjectName(), args);
   }
 }
diff --git a/src/main/java/com/googlesource/gerrit/plugins/hooks/RefUpdate.java b/src/main/java/com/googlesource/gerrit/plugins/hooks/RefUpdate.java
index d9b38e4..5840874 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/hooks/RefUpdate.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/hooks/RefUpdate.java
@@ -26,7 +26,7 @@
 import org.eclipse.jgit.lib.ObjectId;
 
 public class RefUpdate implements RefOperationValidationListener {
-  private final SynchronousHook hook;
+  private final Hook hook;
   private final HookFactory hookFactory;
 
   @Inject
@@ -47,11 +47,12 @@
     HookArgs args = hookFactory.createArgs();
     args.add("--project", projectName);
     args.add("--uploader", refEvent.user.getNameEmail());
+    args.add("--uploader-username", refEvent.user.getUserName());
     args.add("--oldrev", getObjectId(refEvent.command.getOldId()).getName());
     args.add("--newrev", getObjectId(refEvent.command.getNewId()).getName());
     args.add("--refname", refEvent.command.getRefName());
 
-    HookResult result = hook.run(projectName, args);
+    HookResult result = hook.execute(projectName, args);
     if (result != null) {
       String output = result.toString();
       if (result.getExitValue() != 0) {
diff --git a/src/main/java/com/googlesource/gerrit/plugins/hooks/ReviewerAdded.java b/src/main/java/com/googlesource/gerrit/plugins/hooks/ReviewerAdded.java
index fca527d..9929255 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/hooks/ReviewerAdded.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/hooks/ReviewerAdded.java
@@ -22,7 +22,7 @@
 
 @Singleton
 class ReviewerAdded implements ReviewerAddedListener {
-  private final AsynchronousHook hook;
+  private final Hook hook;
   private final HookFactory hookFactory;
 
   @Inject
@@ -44,7 +44,7 @@
       args.add("--branch", c.branch);
       args.add("--reviewer", reviewer);
 
-      hook.submit(c.project, args);
+      hook.execute(c.project, args);
     }
   }
 }
diff --git a/src/main/java/com/googlesource/gerrit/plugins/hooks/ReviewerDeleted.java b/src/main/java/com/googlesource/gerrit/plugins/hooks/ReviewerDeleted.java
index e23677d..0cf6ce7 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/hooks/ReviewerDeleted.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/hooks/ReviewerDeleted.java
@@ -21,7 +21,7 @@
 
 @Singleton
 class ReviewerDeleted implements ReviewerDeletedListener {
-  private final AsynchronousHook hook;
+  private final Hook hook;
   private final HookFactory hookFactory;
 
   @Inject
@@ -43,6 +43,6 @@
     args.add("--reviewer", event.getReviewer());
     args.addApprovals(event.getNewApprovals(), event.getOldApprovals());
 
-    hook.submit(c.project, args);
+    hook.execute(c.project, args);
   }
 }
diff --git a/src/main/java/com/googlesource/gerrit/plugins/hooks/RevisionCreated.java b/src/main/java/com/googlesource/gerrit/plugins/hooks/RevisionCreated.java
index cd4a9d1..ebf5a7b 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/hooks/RevisionCreated.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/hooks/RevisionCreated.java
@@ -21,7 +21,7 @@
 
 @Singleton
 public class RevisionCreated implements RevisionCreatedListener {
-  private final AsynchronousHook hook;
+  private final Hook hook;
   private final HookFactory hookFactory;
 
   @Inject
@@ -47,6 +47,6 @@
     args.add("--commit", event.getRevision().commit.commit);
     args.add("--patchset", event.getRevision()._number);
 
-    hook.submit(c.project, args);
+    hook.execute(c.project, args);
   }
 }
diff --git a/src/main/java/com/googlesource/gerrit/plugins/hooks/SynchronousHook.java b/src/main/java/com/googlesource/gerrit/plugins/hooks/SynchronousHook.java
index 03cbc40..d4dfaf8 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/hooks/SynchronousHook.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/hooks/SynchronousHook.java
@@ -24,11 +24,13 @@
     this.executor = executor;
   }
 
-  HookResult run(HookArgs args) {
+  @Override
+  HookResult execute(HookArgs args) {
     return executor.submit(path, args);
   }
 
-  HookResult run(String projectName, HookArgs args) {
+  @Override
+  HookResult execute(String projectName, HookArgs args) {
     return executor.submit(projectName, path, args);
   }
 }
diff --git a/src/main/java/com/googlesource/gerrit/plugins/hooks/TopicEdited.java b/src/main/java/com/googlesource/gerrit/plugins/hooks/TopicEdited.java
index e608694..62407dd 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/hooks/TopicEdited.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/hooks/TopicEdited.java
@@ -21,7 +21,7 @@
 
 @Singleton
 class TopicEdited implements TopicEditedListener {
-  private final AsynchronousHook hook;
+  private final Hook hook;
   private final HookFactory hookFactory;
 
   @Inject
@@ -43,6 +43,6 @@
     args.add("--old-topic", event.getOldTopic());
     args.add("--new-topic", event.getChange().topic);
 
-    hook.submit(c.project, args);
+    hook.execute(c.project, args);
   }
 }
diff --git a/src/main/resources/Documentation/hooks.md b/src/main/resources/Documentation/hooks.md
index 1fcb0c9..0787fb3 100644
--- a/src/main/resources/Documentation/hooks.md
+++ b/src/main/resources/Documentation/hooks.md
@@ -15,7 +15,7 @@
 up server threads.  See [`hooks.syncHookTimeout`][1] for configuration details.
 
 ```
-  ref-update --project <project name> --refname <refname> --uploader <uploader> --oldrev <sha1> --newrev <sha1>
+  ref-update --project <project name> --refname <refname> --uploader <uploader> --uploader-username <username> --oldrev <sha1> --newrev <sha1>
 ```
 
 commit-received
@@ -31,7 +31,7 @@
 up server threads.  See [`hooks.syncHookTimeout`][1] for configuration details.
 
 ```
-  commit-received --project <project name> --refname <refname> --uploader <uploader> --oldrev <sha1> --newrev <sha1> --cmdref <refname>
+  commit-received --project <project name> --refname <refname> --uploader <uploader> --uploader-username <username> --oldrev <sha1> --newrev <sha1> --cmdref <refname>
 ```
 
 patchset-created
@@ -40,7 +40,7 @@
 Called whenever a patchset is created (this includes new changes and drafts).
 
 ```
-  patchset-created --change <change id> --is-draft <boolean> --kind <change kind> --change-url <change url> --change-owner <change owner> --project <project name> --branch <branch> --topic <topic> --uploader <uploader> --commit <sha1> --patchset <patchset id>
+  patchset-created --change <change id> --is-draft <boolean> --kind <change kind> --change-url <change url> --change-owner <change owner> --change-owner-username <username> --project <project name> --branch <branch> --topic <topic> --uploader <uploader> --uploader-username <username> --commit <sha1> --patchset <patchset id>
 ```
 
 The `--kind` parameter represents the kind of change uploaded. See documentation
@@ -52,7 +52,7 @@
 Called whenever a draft change is published.
 
 ```
-  draft-published --change <change id> --change-url <change url> --change-owner <change owner> --project <project name> --branch <branch> --topic <topic> --uploader <uploader> --commit <sha1> --patchset <patchset id>
+  draft-published --change <change id> --change-url <change url> --change-owner <change owner> --change-owner-username <username> --project <project name> --branch <branch> --topic <topic> --uploader <uploader> --uploader-username <username> --commit <sha1> --patchset <patchset id>
 ```
 
 comment-added
@@ -61,7 +61,7 @@
 Called whenever a comment is added to a change.
 
 ```
-  comment-added --change <change id> --is-draft <boolean> --change-url <change url> --change-owner <change owner> --project <project name> --branch <branch> --topic <topic> --author <comment author> --commit <commit> --comment <comment> [--<approval category id> <score> --<approval category id> <score> --<approval category id>-oldValue <score> ...]
+  comment-added --change <change id> --is-draft <boolean> --change-url <change url> --change-owner <change owner> --change-owner-username <username> --project <project name> --branch <branch> --topic <topic> --author <comment author> --author-username <username> --commit <commit> --comment <comment> [--<approval category id> <score> --<approval category id> <score> --<approval category id>-oldValue <score> ...]
 ```
 
 change-merged
@@ -70,7 +70,7 @@
 Called whenever a change has been merged.
 
 ```
-  change-merged --change <change id> --change-url <change url> --change-owner <change owner> --project <project name> --branch <branch> --topic <topic> --submitter <submitter> --commit <sha1> --newrev <sha1>
+  change-merged --change <change id> --change-url <change url> --change-owner <change owner> --change-owner-username <username> --project <project name> --branch <branch> --topic <topic> --submitter <submitter> --submitter-username <username> --commit <sha1> --newrev <sha1>
 ```
 
 change-abandoned
@@ -79,7 +79,7 @@
 Called whenever a change has been abandoned.
 
 ```
-  change-abandoned --change <change id> --change-url <change url> --change-owner <change owner> --project <project name> --branch <branch> --topic <topic> --abandoner <abandoner> --commit <sha1> --reason <reason>
+  change-abandoned --change <change id> --change-url <change url> --change-owner <change owner> --change-owner-username <username> --project <project name> --branch <branch> --topic <topic> --abandoner <abandoner> --abandoner-username <username> --commit <sha1> --reason <reason>
 ```
 
 change-restored
@@ -88,7 +88,7 @@
 Called whenever a change has been restored.
 
 ```
-  change-restored --change <change id> --change-url <change url> --change-owner <change owner> --project <project name> --branch <branch> --topic <topic> --restorer <restorer> --commit <sha1> --reason <reason>
+  change-restored --change <change id> --change-url <change url> --change-owner <change owner> --change-owner-username <username> --project <project name> --branch <branch> --topic <topic> --restorer <restorer> --restorer-username <username> --commit <sha1> --reason <reason>
 ```
 
 ref-updated
@@ -97,7 +97,7 @@
 Called whenever a ref has been updated.
 
 ```
-  ref-updated --oldrev <old rev> --newrev <new rev> --refname <ref name> --project <project name> --submitter <submitter>
+  ref-updated --oldrev <old rev> --newrev <new rev> --refname <ref name> --project <project name> --submitter <submitter> --submitter-username <username>
 ```
 
 project-created
@@ -115,7 +115,7 @@
 Called whenever a reviewer is added to a change.
 
 ```
-  reviewer-added --change <change id> --change-url <change url> --change-owner <change owner> --project <project name> --branch <branch> --reviewer <reviewer>
+  reviewer-added --change <change id> --change-url <change url> --change-owner <change owner> --change-owner-username <username> --project <project name> --branch <branch> --reviewer <reviewer> --reviewer-username <username>
 ```
 
 reviewer-deleted
@@ -124,7 +124,7 @@
 Called whenever a reviewer (with a vote) is removed from a change.
 
 ```
-  reviewer-deleted --change <change id> --change-url <change url> --change-owner <change owner> --project <project name> --branch <branch> --reviewer <reviewer> [--<approval category id> <score> --<approval category id> <score> ...]
+  reviewer-deleted --change <change id> --change-url <change url> --change-owner <change owner> --change-owner-username <username> --project <project name> --branch <branch> --reviewer <reviewer> [--<approval category id> <score> --<approval category id> <score> ...]
 ```
 
 topic-changed
@@ -133,7 +133,7 @@
 Called whenever a change's topic is changed from the Web UI or via the REST API.
 
 ```
-  topic-changed --change <change id> --change-owner <change owner> --project <project name> --branch <branch> --changer <changer> --old-topic <old topic> --new-topic <new topic>
+  topic-changed --change <change id> --change-owner <change owner> --change-owner-username <username> --project <project name> --branch <branch> --changer <changer> --changer-username <username> --old-topic <old topic> --new-topic <new topic>
 ```
 
 hashtags-changed
@@ -143,7 +143,7 @@
 or via the REST API.
 
 ```
-  hashtags-changed --change <change id>  --change-owner <change owner> --project <project name> --branch <branch> --editor <editor> --added <hashtag> --removed <hashtag> --hashtag <hashtag>
+  hashtags-changed --change <change id>  --change-owner <change owner> --change-owner-username <username> --project <project name> --branch <branch> --editor <editor> --editor-username <username> --added <hashtag> --removed <hashtag> --hashtag <hashtag>
 ```
 
 The `--added` parameter may be passed multiple times, once for each