Index: src/zope/app/applicationcontrol/browser/runtimeinfo.pt
===================================================================
--- src/zope/app/applicationcontrol/browser/runtimeinfo.pt	(Revision 69632)
+++ src/zope/app/applicationcontrol/browser/runtimeinfo.pt	(Arbeitskopie)
@@ -49,6 +49,11 @@
             tal:content="runtime_info/ProcessId">ID</div>
      </div>
      <div class="row">
+       <div class="label" i18n:translate="">Developer mode</div>
+       <div class="field"
+            tal:content="runtime_info/DeveloperMode">ID</div>
+     </div>
+     <div class="row">
        <div class="label" i18n:translate="">Python path</div>
        <div class="field">
         <ul>
Index: src/zope/app/applicationcontrol/browser/tests/test_runtimeinfoview.py
===================================================================
--- src/zope/app/applicationcontrol/browser/tests/test_runtimeinfoview.py	(Revision 69632)
+++ src/zope/app/applicationcontrol/browser/tests/test_runtimeinfoview.py	(Arbeitskopie)
@@ -43,7 +43,7 @@
 
         assert_keys = ['ZopeVersion', 'PythonVersion', 'PythonPath',
               'SystemPlatform', 'PreferredEncoding', 'FileSystemEncoding',
-              'CommandLine', 'ProcessId', 'Uptime' ]
+              'CommandLine', 'ProcessId', 'Uptime', 'DeveloperMode' ]
         test_keys = test_format.keys()
 
         assert_keys.sort()
@@ -60,7 +60,7 @@
 
         assert_keys = ['ZopeVersion', 'PythonVersion', 'PythonPath',
               'SystemPlatform', 'PreferredEncoding', 'FileSystemEncoding',
-              'CommandLine', 'ProcessId', 'Uptime']
+              'CommandLine', 'ProcessId', 'Uptime', 'DeveloperMode' ]
         test_keys = test_format.keys()
 
         assert_keys.sort()
Index: src/zope/app/applicationcontrol/browser/runtimeinfo.py
===================================================================
--- src/zope/app/applicationcontrol/browser/runtimeinfo.py	(Revision 69632)
+++ src/zope/app/applicationcontrol/browser/runtimeinfo.py	(Arbeitskopie)
@@ -32,7 +32,8 @@
         "PreferredEncoding",
         "FileSystemEncoding",
         "CommandLine",
-        "ProcessId"
+        "ProcessId",
+        "DeveloperMode",
         )
     _unavailable = _("Unavailable")
 
Index: src/zope/app/applicationcontrol/runtimeinfo.py
===================================================================
--- src/zope/app/applicationcontrol/runtimeinfo.py	(Revision 69632)
+++ src/zope/app/applicationcontrol/runtimeinfo.py	(Arbeitskopie)
@@ -37,6 +37,7 @@
 from zope.app.applicationcontrol.interfaces import IApplicationControl
 from zope.app.applicationcontrol.interfaces import IZopeVersion
 
+from zope.app.appsetup import appsetup
 
 class RuntimeInfo(object):
     """Runtime information."""
@@ -47,6 +48,15 @@
     def __init__(self, context):
         self.context = context
 
+    def getDeveloperMode(self):
+        """See zope.app.applicationcontrol.interfaces.IRuntimeInfo"""
+        cc=appsetup.getConfigContext()
+        if cc == None:  # make the test run
+            return 'undefined'
+        if cc.hasFeature('devmode'): 
+            return 'On'
+        return 'Off'
+
     def getPreferredEncoding(self):
         """See zope.app.applicationcontrol.interfaces.IRuntimeInfo"""
         if locale is not None:
Index: src/zope/app/applicationcontrol/interfaces.py
===================================================================
--- src/zope/app/applicationcontrol/interfaces.py	(Revision 69632)
+++ src/zope/app/applicationcontrol/interfaces.py	(Arbeitskopie)
@@ -30,6 +30,9 @@
 class IRuntimeInfo(Interface):
     """Runtime Information Adapter for Application Control"""
 
+    def getDeveloperMode():
+        """Return the current developer mode setting""" 
+
     def getPreferredEncoding():
         """Return the encoding used for text data, according
            to user system preferences"""