diff --git a/src/__phutil_library_map__.php b/src/__phutil_library_map__.php
--- a/src/__phutil_library_map__.php
+++ b/src/__phutil_library_map__.php
@@ -349,6 +349,7 @@
     'DarkConsoleEventPlugin' => 'applications/console/plugin/DarkConsoleEventPlugin.php',
     'DarkConsoleEventPluginAPI' => 'applications/console/plugin/event/DarkConsoleEventPluginAPI.php',
     'DarkConsolePlugin' => 'applications/console/plugin/DarkConsolePlugin.php',
+    'DarkConsoleRealtimePlugin' => 'applications/console/plugin/DarkConsoleRealtimePlugin.php',
     'DarkConsoleRequestPlugin' => 'applications/console/plugin/DarkConsoleRequestPlugin.php',
     'DarkConsoleServicesPlugin' => 'applications/console/plugin/DarkConsoleServicesPlugin.php',
     'DarkConsoleStartupPlugin' => 'applications/console/plugin/DarkConsoleStartupPlugin.php',
@@ -5144,6 +5145,7 @@
     'DarkConsoleEventPlugin' => 'DarkConsolePlugin',
     'DarkConsoleEventPluginAPI' => 'PhabricatorEventListener',
     'DarkConsolePlugin' => 'Phobject',
+    'DarkConsoleRealtimePlugin' => 'DarkConsolePlugin',
     'DarkConsoleRequestPlugin' => 'DarkConsolePlugin',
     'DarkConsoleServicesPlugin' => 'DarkConsolePlugin',
     'DarkConsoleStartupPlugin' => 'DarkConsolePlugin',
diff --git a/src/applications/console/plugin/DarkConsoleRealtimePlugin.php b/src/applications/console/plugin/DarkConsoleRealtimePlugin.php
new file mode 100644
--- /dev/null
+++ b/src/applications/console/plugin/DarkConsoleRealtimePlugin.php
@@ -0,0 +1,26 @@
+<?php
+
+final class DarkConsoleRealtimePlugin extends DarkConsolePlugin {
+
+  public function getName() {
+    return pht('Realtime');
+  }
+
+  public function getColor() {
+    return null;
+  }
+
+  public function getDescription() {
+    return pht('Debugging console for real-time notifications.');
+  }
+
+  public function renderPanel() {
+    return phutil_tag(
+      'div',
+      array(
+        'id' => 'dark-console-realtime-log',
+        'class' => 'dark-console-log-frame',
+      ));
+  }
+
+}
diff --git a/webroot/rsrc/css/aphront/dark-console.css b/webroot/rsrc/css/aphront/dark-console.css
--- a/webroot/rsrc/css/aphront/dark-console.css
+++ b/webroot/rsrc/css/aphront/dark-console.css
@@ -217,3 +217,17 @@
 .dark-console-panel-error-details {
   display: none;
 }
+
+.dark-console-log-frame {
+  height: 500px;
+  overflow: auto;
+  background: #303030;
+  border: 1px solid #202020;
+  margin: 4px;
+}
+
+.dark-console-log-message {
+  background: #404040;
+  padding: 8px;
+  margin: 2px;
+}
diff --git a/webroot/rsrc/js/application/aphlict/behavior-aphlict-listen.js b/webroot/rsrc/js/application/aphlict/behavior-aphlict-listen.js
--- a/webroot/rsrc/js/application/aphlict/behavior-aphlict-listen.js
+++ b/webroot/rsrc/js/application/aphlict/behavior-aphlict-listen.js
@@ -114,9 +114,16 @@
     config.websocketURI,
     config.subscriptions);
 
-  client
-    .setHandler(onAphlictMessage)
-    .start();
+  var start_client = function() {
+    client
+      .setHandler(onAphlictMessage)
+      .start();
+  };
+
+  // Don't start the client until other behaviors have had a chance to
+  // initialize. In particular, we want to capture events into the log for
+  // the DarkConsole "Realtime" panel.
+  setTimeout(start_client, 0);
 
   JX.Stratcom.listen(
     'quicksand-redraw',
diff --git a/webroot/rsrc/js/core/darkconsole/DarkLog.js b/webroot/rsrc/js/core/darkconsole/DarkLog.js
new file mode 100644
--- /dev/null
+++ b/webroot/rsrc/js/core/darkconsole/DarkLog.js
@@ -0,0 +1,47 @@
+/**
+ * @provides phabricator-darklog
+ * @javelin
+ */
+
+JX.install('DarkLog', {
+
+  construct: function() {
+    this._messages = [];
+  },
+
+  members: {
+    _node: null,
+    _messages: null,
+
+    addMessage: function(message) {
+      var node = message.getNode();
+
+      this._messages.push(message);
+      if (this._node) {
+        this._append([node]);
+      }
+
+      return this;
+    },
+
+    setNode: function(node) {
+      var nodes = [];
+      for (var ii = 0; ii < this._messages.length; ii++) {
+        nodes.push(this._messages[ii].getNode());
+      }
+
+      this._node = node;
+      this._append(nodes);
+
+      return this;
+    },
+
+    _append: function(nodes) {
+      for (var ii = 0; ii < nodes.length; ii++) {
+        this._node.appendChild(nodes[ii]);
+      }
+    }
+
+  }
+
+});
diff --git a/webroot/rsrc/js/core/darkconsole/DarkMessage.js b/webroot/rsrc/js/core/darkconsole/DarkMessage.js
new file mode 100644
--- /dev/null
+++ b/webroot/rsrc/js/core/darkconsole/DarkMessage.js
@@ -0,0 +1,37 @@
+/**
+ * @provides phabricator-darkmessage
+ * @javelin
+ */
+
+JX.install('DarkMessage', {
+
+  construct: function() {
+
+  },
+
+  members: {
+    _node: null,
+    _message: null,
+
+    setMessage: function(message) {
+      this._message = message;
+
+      JX.DOM.setContent(this.getNode(), message);
+
+      return this;
+    },
+
+    getNode: function() {
+      if (!this._node) {
+        this._node = JX.$N(
+          'div',
+          {
+            className: 'dark-console-log-message'
+          });
+      }
+
+      return this._node;
+    }
+  }
+
+});
diff --git a/webroot/rsrc/js/core/behavior-dark-console.js b/webroot/rsrc/js/core/darkconsole/behavior-dark-console.js
rename from webroot/rsrc/js/core/behavior-dark-console.js
rename to webroot/rsrc/js/core/darkconsole/behavior-dark-console.js
--- a/webroot/rsrc/js/core/behavior-dark-console.js
+++ b/webroot/rsrc/js/core/darkconsole/behavior-dark-console.js
@@ -6,6 +6,8 @@
  *           javelin-dom
  *           javelin-request
  *           phabricator-keyboard-shortcut
+ *           phabricator-darklog
+ *           phabricator-darkmessage
  */
 
 JX.behavior('dark-console', function(config, statics) {
@@ -246,6 +248,12 @@
 
     var div = JX.$N('div', {className: 'dark-console-panel-core'}, JX.$H(html));
     JX.DOM.setContent(statics.el.panel, div);
+
+    var params = {
+      panel: tclass
+    };
+
+    JX.Stratcom.invoke('darkconsole.draw', null, params);
   }
 
   function install_shortcut() {
@@ -287,4 +295,70 @@
   }
   add_request(config);
 
+
+/* -(  Realtime Panel  )----------------------------------------------------- */
+
+
+  if (!statics.realtime) {
+    statics.realtime = true;
+
+    var realtime_log = new JX.DarkLog();
+    var realtime_id = 'dark-console-realtime-log';
+
+    JX.Stratcom.listen('darkconsole.draw', null, function(e) {
+      var data = e.getData();
+      if (data.panel != 'DarkConsoleRealtimePlugin') {
+        return;
+      }
+
+      var node = JX.$(realtime_id);
+      realtime_log.setNode(node);
+    });
+
+    // If the panel is initially visible, try rendering.
+    try {
+      var node = JX.$(realtime_id);
+      realtime_log.setNode(node);
+    } catch (exception) {
+      // Ignore.
+    }
+
+    var leader_log = function(event_name, type, is_leader, details) {
+      var parts = [];
+      if (is_leader === true) {
+        parts.push('+');
+      } else if (is_leader === false) {
+        parts.push('-');
+      } else {
+        parts.push('~');
+      }
+
+      parts.push('[Leader/' + event_name + ']');
+
+      if (type) {
+        parts.push('(' + type + ')');
+      }
+
+      if (details) {
+        parts.push(details);
+      }
+
+      parts = parts.join(' ');
+
+      var message = new JX.DarkMessage()
+        .setMessage(parts);
+
+      realtime_log.addMessage(message);
+    };
+
+    JX.Leader.listen('onReceiveBroadcast', function(message, is_leader) {
+      var json = JX.JSON.stringify(message.data);
+      leader_log('onReceiveBroadcast', message.type, is_leader, json);
+    });
+
+    JX.Leader.listen('onBecomeLeader', function() {
+      leader_log('onBecomeLeader');
+    });
+  }
+
 });