diff --git a/compiler/cli/src/org/jetbrains/jet/cli/jvm/compiler/JetCoreEnvironment.java b/compiler/cli/src/org/jetbrains/jet/cli/jvm/compiler/JetCoreEnvironment.java
index 6c0f03aad62..4c0ee505d0b 100644
--- a/compiler/cli/src/org/jetbrains/jet/cli/jvm/compiler/JetCoreEnvironment.java
+++ b/compiler/cli/src/org/jetbrains/jet/cli/jvm/compiler/JetCoreEnvironment.java
@@ -36,6 +36,8 @@ import com.intellij.psi.PsiManager;
 import com.intellij.psi.impl.compiled.ClsCustomNavigationPolicy;
 import com.intellij.psi.impl.file.impl.JavaFileManager;
 import org.jetbrains.annotations.NotNull;
+import org.jetbrains.jet.CompilerModeProvider;
+import org.jetbrains.jet.OperationModeProvider;
 import org.jetbrains.jet.asJava.JavaElementFinder;
 import org.jetbrains.jet.asJava.LightClassGenerationSupport;
 import org.jetbrains.jet.cli.common.CLIConfigurationKeys;
@@ -89,6 +91,8 @@ public class JetCoreEnvironment {
         applicationEnvironment.registerParserDefinition(new JavaParserDefinition());
         applicationEnvironment.registerParserDefinition(new JetParserDefinition());
 
+        applicationEnvironment.getApplication().registerService(OperationModeProvider.class, new CompilerModeProvider());
+
         projectEnvironment = new JavaCoreProjectEnvironment(parentDisposable, applicationEnvironment);
 
         MockProject project = projectEnvironment.getProject();
diff --git a/compiler/frontend/src/org/jetbrains/jet/CompilerModeProvider.java b/compiler/frontend/src/org/jetbrains/jet/CompilerModeProvider.java
new file mode 100644
index 00000000000..0dcf42cb98c
--- /dev/null
+++ b/compiler/frontend/src/org/jetbrains/jet/CompilerModeProvider.java
@@ -0,0 +1,26 @@
+/*
+ * Copyright 2010-2013 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.jetbrains.jet;
+
+public class CompilerModeProvider implements OperationModeProvider {
+    public static final OperationMode COMPILER_MODE = new OperationMode("compiler mode");
+
+    @Override
+    public OperationMode getMode() {
+        return COMPILER_MODE;
+    }
+}
diff --git a/compiler/frontend/src/org/jetbrains/jet/OperationMode.java b/compiler/frontend/src/org/jetbrains/jet/OperationMode.java
new file mode 100644
index 00000000000..ca2476924e2
--- /dev/null
+++ b/compiler/frontend/src/org/jetbrains/jet/OperationMode.java
@@ -0,0 +1,32 @@
+/*
+ * Copyright 2010-2013 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.jetbrains.jet;
+
+import org.jetbrains.annotations.NotNull;
+
+public final class OperationMode {
+    private final String id;
+
+    public OperationMode(@NotNull String id) {
+        this.id = id;
+    }
+
+    @Override
+    public String toString() {
+        return id;
+    }
+}
diff --git a/compiler/frontend/src/org/jetbrains/jet/OperationModeProvider.java b/compiler/frontend/src/org/jetbrains/jet/OperationModeProvider.java
new file mode 100644
index 00000000000..08cb9849224
--- /dev/null
+++ b/compiler/frontend/src/org/jetbrains/jet/OperationModeProvider.java
@@ -0,0 +1,32 @@
+/*
+ * Copyright 2010-2013 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.jetbrains.jet;
+
+import com.intellij.openapi.components.ServiceManager;
+
+public interface OperationModeProvider {
+    class SERVICE {
+        private SERVICE() {
+        }
+
+        public static OperationMode getMode() {
+            return ServiceManager.getService(OperationModeProvider.class).getMode();
+        }
+    }
+
+    OperationMode getMode();
+}
diff --git a/idea/src/META-INF/plugin.xml b/idea/src/META-INF/plugin.xml
index 787020bf0ec..abee33c0135 100644
--- a/idea/src/META-INF/plugin.xml
+++ b/idea/src/META-INF/plugin.xml
@@ -74,6 +74,9 @@
       <applicationService serviceInterface="org.jetbrains.jet.lang.psi.stubs.elements.StubIndexService"
                           serviceImplementation="org.jetbrains.jet.plugin.stubindex.StubIndexServiceImpl" />
 
+      <applicationService serviceInterface="org.jetbrains.jet.OperationModeProvider"
+                          serviceImplementation="org.jetbrains.jet.plugin.IdeModeProvider" />
+
       <projectService serviceInterface="org.jetbrains.jet.lang.resolve.java.JetFilesProvider"
                       serviceImplementation="org.jetbrains.jet.plugin.project.PluginJetFilesProvider"/>
 
diff --git a/idea/src/org/jetbrains/jet/plugin/IdeModeProvider.java b/idea/src/org/jetbrains/jet/plugin/IdeModeProvider.java
new file mode 100644
index 00000000000..8e7718498f8
--- /dev/null
+++ b/idea/src/org/jetbrains/jet/plugin/IdeModeProvider.java
@@ -0,0 +1,29 @@
+/*
+ * Copyright 2010-2013 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.jetbrains.jet.plugin;
+
+import org.jetbrains.jet.OperationMode;
+import org.jetbrains.jet.OperationModeProvider;
+
+public class IdeModeProvider implements OperationModeProvider {
+    public static final OperationMode IDE_MODE = new OperationMode("IDE mode");
+
+    @Override
+    public OperationMode getMode() {
+        return IDE_MODE;
+    }
+}