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+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef COMPONENTS_ZUCCHINI_MAIN_UTILS_H_
+#define COMPONENTS_ZUCCHINI_MAIN_UTILS_H_
+
+#include <iosfwd>
+
+#include "base/files/file_path.h"
+#include "components/zucchini/zucchini.h"
+
+// Utilities to run Zucchini command based on command-line input, and to print
+// help messages.
+
+namespace base {
+
+class CommandLine;
+
+}  // namespace base
+
+// To add a new Zucchini command:
+// 1. Declare the command's main function in zucchini_command.h. Its signature
+//    must match CommandFunction.
+// 2. Define the command's main function in zucchini_command.cc.
+// 3. Add a new entry into |kCommands| in main_utils.cc.
+
+// Searches |command_line| for Zucchini commands. If a unique command is found,
+// runs it (passes |out| and |err|), and logs resource usage. Otherwise prints
+// help message to |err|. Returns Zucchini status code for error handling.
+zucchini::status::Code RunZucchiniCommand(const base::CommandLine& command_line,
+                                          std::ostream& out,
+                                          std::ostream& err);
+
+#endif  // COMPONENTS_ZUCCHINI_MAIN_UTILS_H_