diff --git a/plugins/groovy/src/META-INF/plugin.xml b/plugins/groovy/src/META-INF/plugin.xml
index 8355dd55750a..353a39270ce9 100644
--- a/plugins/groovy/src/META-INF/plugin.xml
+++ b/plugins/groovy/src/META-INF/plugin.xml
@@ -363,6 +363,8 @@
                             id="groovyBasic2ClassName" order="first, after liveTemplates"/>
     <completion.contributor language="Groovy" implementationClass="org.jetbrains.plugins.groovy.lang.completion.GroovyCompletionContributor"
                             id="groovyBasic" order="before javaClassName"/>
+    <completion.contributor language="Groovy" implementationClass="org.jetbrains.plugins.groovy.console.GroovyShellCompletionContributor"/>
+
     <completion.contributor language="Groovy"
                             implementationClass="org.jetbrains.plugins.groovy.lang.completion.GroovySmartCompletionContributor"/>
     <completion.contributor language="Groovy" implementationClass="org.jetbrains.plugins.groovy.lang.completion.GrMethodMergingContributor"
diff --git a/plugins/groovy/src/org/jetbrains/plugins/groovy/console/GroovyShellCodeFragment.java b/plugins/groovy/src/org/jetbrains/plugins/groovy/console/GroovyShellCodeFragment.java
index 2612bcd0860e..cb2e179e470d 100644
--- a/plugins/groovy/src/org/jetbrains/plugins/groovy/console/GroovyShellCodeFragment.java
+++ b/plugins/groovy/src/org/jetbrains/plugins/groovy/console/GroovyShellCodeFragment.java
@@ -142,4 +142,12 @@ public class GroovyShellCodeFragment extends GroovyCodeFragment {
   public void addTypeDefinition(GrTypeDefinition typeDefinition) {
     myTypeDefinitions.put(typeDefinition.getName(), typeDefinition);
   }
+
+  public void clearVariables() {
+    myVariables.clear();
+  }
+
+  public void clearClasses() {
+    myTypeDefinitions.clear();
+  }
 }
diff --git a/plugins/groovy/src/org/jetbrains/plugins/groovy/console/GroovyShellCompletionContributor.java b/plugins/groovy/src/org/jetbrains/plugins/groovy/console/GroovyShellCompletionContributor.java
new file mode 100644
index 000000000000..709c5e396483
--- /dev/null
+++ b/plugins/groovy/src/org/jetbrains/plugins/groovy/console/GroovyShellCompletionContributor.java
@@ -0,0 +1,114 @@
+/*
+ * Copyright 2000-2013 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.plugins.groovy.console;
+
+import com.intellij.codeInsight.completion.CompletionContributor;
+import com.intellij.codeInsight.completion.CompletionParameters;
+import com.intellij.codeInsight.completion.CompletionResultSet;
+import com.intellij.codeInsight.lookup.LookupElementBuilder;
+import com.intellij.psi.PsiElement;
+import com.intellij.psi.PsiFile;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.plugins.groovy.lang.psi.GroovyPsiElement;
+import org.jetbrains.plugins.groovy.lang.psi.api.statements.expressions.GrCommandArgumentList;
+import org.jetbrains.plugins.groovy.lang.psi.api.statements.expressions.GrExpression;
+import org.jetbrains.plugins.groovy.lang.psi.api.statements.expressions.GrMethodCall;
+import org.jetbrains.plugins.groovy.lang.psi.api.statements.expressions.GrReferenceExpression;
+import org.jetbrains.plugins.groovy.lang.psi.util.PsiUtil;
+
+/**
+ * Created by Max Medvedev on 9/8/13
+ */
+public class GroovyShellCompletionContributor extends CompletionContributor {
+  @Override
+  public void fillCompletionVariants(CompletionParameters parameters, CompletionResultSet result) {
+    PsiFile file = parameters.getOriginalFile();
+    if (!(file instanceof GroovyShellCodeFragment)) return;
+
+    PsiElement position = parameters.getPosition();
+    PsiElement parent = position.getParent();
+
+    if (!(parent instanceof GrReferenceExpression && !((GrReferenceExpression)parent).isQualified())) return;
+
+    if (PsiUtil.isExpressionStatement(parent)) {
+      addAllCommands(result);
+    }
+    else if (parent.getParent() instanceof GrCommandArgumentList) {
+      PsiElement ppparent = parent.getParent().getParent();
+      if (ppparent instanceof GrMethodCall && isFirstArg((GrMethodCall)ppparent, parent)) {
+        GrExpression invokedExpression = ((GrMethodCall)ppparent).getInvokedExpression();
+        if (invokedExpression instanceof GrReferenceExpression && !((GrReferenceExpression)invokedExpression).isQualified()) {
+          String name = ((GrReferenceExpression)invokedExpression).getReferenceName();
+
+          if ("help".equals(name)) {
+            addAllCommands(result);
+          }
+          else if ("show".equals(name)) {
+            add(result, "classes");
+            add(result, "imports");
+            add(result, "preferences");
+            add(result, "all");
+          }
+          else if ("purge".equals(name)) {
+            add(result, "variables");
+            add(result, "classes");
+            add(result, "imports");
+            add(result, "preferences");
+            add(result, "all");
+          }
+          else if ("record".equals(name)) {
+            add(result, "start");
+            add(result, "stop");
+            add(result, "status");
+          }
+          else if ("history".equals(name)) {
+            add(result, "show");
+            add(result, "recall");
+            add(result, "flush");
+            add(result, "clear");
+          }
+        }
+      }
+    }
+  }
+
+  private static void add(@NotNull CompletionResultSet result, @NotNull String name) {
+    result.addElement(LookupElementBuilder.create(name));
+  }
+
+  private static void addAllCommands(@NotNull CompletionResultSet result) {
+    add(result, "help");
+    add(result, "exit");
+    add(result, "quit");
+    add(result, "display");
+    add(result, "clear");
+    add(result, "show");
+    add(result, "inspect");
+    add(result, "purge");
+    add(result, "edit");
+    add(result, "load");
+    add(result, "save");
+    add(result, "record");
+    add(result, "history");
+    add(result, "alias");
+    add(result, "set");
+  }
+
+  private static boolean isFirstArg(@NotNull GrMethodCall ppparent, @NotNull PsiElement parent) {
+    GroovyPsiElement[] arguments = ppparent.getArgumentList().getAllArguments();
+    return arguments.length > 0 && arguments[0] == parent;
+  }
+}
diff --git a/plugins/groovy/src/org/jetbrains/plugins/groovy/console/GroovyShellConsoleImpl.java b/plugins/groovy/src/org/jetbrains/plugins/groovy/console/GroovyShellConsoleImpl.java
index bb50a53e8a16..ccfe315c1e2f 100644
--- a/plugins/groovy/src/org/jetbrains/plugins/groovy/console/GroovyShellConsoleImpl.java
+++ b/plugins/groovy/src/org/jetbrains/plugins/groovy/console/GroovyShellConsoleImpl.java
@@ -58,34 +58,68 @@ public class GroovyShellConsoleImpl extends LanguageConsoleImpl {
   protected String addToHistoryInner(@NotNull TextRange textRange, @NotNull EditorEx editor, boolean erase, boolean preserveMarkup) {
     final String result = super.addToHistoryInner(textRange, editor, erase, preserveMarkup);
 
-    GroovyShellCodeFragment codeFragment = (GroovyShellCodeFragment)myFile;
-    GrTopStatement[] definitions = codeFragment.getTopStatements();
+    if ("purge variables".equals(result.trim())) {
+      clearVariables();
+    }
+    else if ("purge classes".equals(result.trim())) {
+      clearClasses();
+    }
+    else if ("purge imports".equals(result.trim())) {
+      clearImports();
+    }
+    else if ("purge all".equals(result.trim())) {
+      clearVariables();
+      clearClasses();
+      clearImports();
+    }
+    else {
+      processCode();
+    }
 
-    for (GrTopStatement statement : definitions) {
+    return result;
+  }
+
+  private void processCode() {
+    for (GrTopStatement statement : getFile().getTopStatements()) {
       if (statement instanceof GrImportStatement) {
-        codeFragment.addImportsFromString(importToString((GrImportStatement)statement));
+        getFile().addImportsFromString(importToString((GrImportStatement)statement));
       }
       else if (statement instanceof GrMethod) {
-        codeFragment.addVariable(((GrMethod)statement).getName(), generateClosure((GrMethod)statement));
+        getFile().addVariable(((GrMethod)statement).getName(), generateClosure((GrMethod)statement));
       }
       else if (statement instanceof GrAssignmentExpression) {
         GrAssignmentExpression assignment = (GrAssignmentExpression)statement;
         GrExpression left = assignment.getLValue();
         if (left instanceof GrReferenceExpression && !((GrReferenceExpression)left).isQualified()) {
-          codeFragment.addVariable(((GrReferenceExpression)left).getReferenceName(), assignment.getRValue());
+          getFile().addVariable(((GrReferenceExpression)left).getReferenceName(), assignment.getRValue());
         }
       }
       else if (statement instanceof GrTypeDefinition) {
-        codeFragment.addTypeDefinition(prepareTypeDefinition((GrTypeDefinition)statement));
+        getFile().addTypeDefinition(prepareTypeDefinition((GrTypeDefinition)statement));
       }
     }
 
-    PsiType scriptType = ((GroovyShellCodeFragment)myFile).getInferredScriptReturnType();
+    PsiType scriptType = getFile().getInferredScriptReturnType();
     if (scriptType != null) {
-      codeFragment.addVariable("_", scriptType);
+      getFile().addVariable("_", scriptType);
     }
+  }
 
-    return result;
+  @NotNull
+  public GroovyShellCodeFragment getFile() {
+    return (GroovyShellCodeFragment)myFile;
+  }
+
+  private void clearVariables() {
+    getFile().clearVariables();
+  }
+
+  private void clearClasses() {
+    getFile().clearClasses();
+  }
+
+  private void clearImports() {
+    getFile().clearImports();
   }
 
   @NotNull
diff --git a/plugins/groovy/src/org/jetbrains/plugins/groovy/debugger/fragments/GroovyCodeFragment.java b/plugins/groovy/src/org/jetbrains/plugins/groovy/debugger/fragments/GroovyCodeFragment.java
index 8b2c6b6824e4..45d37ed54e83 100644
--- a/plugins/groovy/src/org/jetbrains/plugins/groovy/debugger/fragments/GroovyCodeFragment.java
+++ b/plugins/groovy/src/org/jetbrains/plugins/groovy/debugger/fragments/GroovyCodeFragment.java
@@ -285,4 +285,9 @@ public class GroovyCodeFragment extends GroovyFileImpl implements JavaCodeFragme
       return null;
     }
   }
+
+  public void clearImports() {
+    myPseudoImports.clear();
+    myOnDemandImports.clear();
+  }
 }