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diff --git a/src/main/java/com/google/devtools/build/lib/analysis/config/ConfigAwareRuleClassBuilder.java b/src/main/java/com/google/devtools/build/lib/analysis/config/ConfigAwareRuleClassBuilder.java
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@@ -0,0 +1,90 @@
+// Copyright 2017 The Bazel Authors. All rights reserved.
+//
+// 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 com.google.devtools.build.lib.analysis.config;
+
+import com.google.devtools.build.lib.packages.RuleClass;
+import java.util.Collection;
+
+/**
+ * A wrapper for {@link RuleClass.Builder} that supports access to {@link
+ * com.google.devtools.build.lib.analysis} classes.
+ *
+ * <p>{@link RuleClass.Builder} is in {@link com.google.devtools.build.lib.packages}, so it can't
+ * reference analysis-time objects.
+ */
+public class ConfigAwareRuleClassBuilder {
+  private final RuleClass.Builder ruleClassBuilder;
+
+  /**
+   * Instantiates a builder wrapped around the given {@link RuleClass.Builder}.
+   */
+  private ConfigAwareRuleClassBuilder(RuleClass.Builder ruleClassBuilder) {
+    this.ruleClassBuilder = ruleClassBuilder;
+  }
+
+  /**
+   * Instantiates a builder wrapped around the given {@link RuleClass.Builder}.
+   */
+  public static ConfigAwareRuleClassBuilder of(RuleClass.Builder ruleClassBuilder) {
+    return new ConfigAwareRuleClassBuilder(ruleClassBuilder);
+  }
+
+  /**
+   * Returns the {@link RuleClass.Builder} this object wraps.
+   *
+   * <p>Call this when done with config-specific building to re-expose the builder methods in
+   * {@link RuleClass.Builder}
+   */
+  public RuleClass.Builder originalBuilder() {
+    return ruleClassBuilder;
+  }
+
+  /**
+   * Declares the fragments required by this rule for the configuration of the host machine this
+   * rule's actions execute on.
+   *
+   * <p>This is not the same as the rule's configuration. The rule's configuration is its
+   * <i>target</i> configuration, which determines the platform it builds outputs for. The actions
+   * created by this rule run on a host machine, which is what the host configuration corresponds
+   * to.
+   *
+   * <p>The value is inherited by subclasses.
+   */
+  public ConfigAwareRuleClassBuilder requiresHostConfigurationFragments(
+      Class<? extends BuildConfiguration.Fragment>... configurationFragments) {
+    ruleClassBuilder.requiresConfigurationFragments(HostTransition.INSTANCE,
+        configurationFragments);
+    return this;
+  }
+
+  /**
+   * Declares the fragments required by this rule for the configuration of the host machine this
+   * rule's actions execute on.
+   *
+   * <p>This is not the same as the rule's configuration. The rule's configuration is its
+   * <i>target</i> configuration, which determines the platform it builds outputs for. The actions
+   * created by this rule run on a host machine, which is what the host configuration corresponds
+   * to.
+   *
+   * <p>In contrast to {@link #requiresHostConfigurationFragments(Class...)}, this method takes
+   * Skylark module names of fragments instead of their classes.
+   */
+  public ConfigAwareRuleClassBuilder requiresHostConfigurationFragmentsBySkylarkModuleName(
+      Collection<String> configurationFragmentNames) {
+    ruleClassBuilder.requiresConfigurationFragmentsBySkylarkModuleName(HostTransition.INSTANCE,
+        configurationFragmentNames);
+    return this;
+  }
+}