diff --git a/include/boost/beast/http/basic_dynamic_body.hpp b/include/boost/beast/http/basic_dynamic_body.hpp
index fb5f8d4304..16b9fbff03 100644
--- a/include/boost/beast/http/basic_dynamic_body.hpp
+++ b/include/boost/beast/http/basic_dynamic_body.hpp
@@ -10,10 +10,12 @@
 #ifndef BOOST_BEAST_HTTP_BASIC_DYNAMIC_BODY_HPP
 #define BOOST_BEAST_HTTP_BASIC_DYNAMIC_BODY_HPP
 
-#include <boost/beast/core/detail/config.hpp>
+#include <boost/beast/http/basic_dynamic_body_fwd.hpp>
+
 #include <boost/beast/core/buffer_traits.hpp>
 #include <boost/beast/core/detail/buffer.hpp>
 #include <boost/beast/core/detail/clamp.hpp>
+#include <boost/beast/core/detail/config.hpp>
 #include <boost/beast/http/error.hpp>
 #include <boost/beast/http/message.hpp>
 #include <boost/optional.hpp>
diff --git a/include/boost/beast/http/basic_dynamic_body_fwd.hpp b/include/boost/beast/http/basic_dynamic_body_fwd.hpp
new file mode 100644
index 0000000000..a6fe9714f4
--- /dev/null
+++ b/include/boost/beast/http/basic_dynamic_body_fwd.hpp
@@ -0,0 +1,24 @@
+//
+// Copyright (c) 2024 Mohammad Nejati
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+// Official repository: https://github.com/boostorg/beast
+//
+
+#ifndef BOOST_BEAST_HTTP_BASIC_DYNAMIC_BODY_FWD_HPP
+#define BOOST_BEAST_HTTP_BASIC_DYNAMIC_BODY_FWD_HPP
+
+namespace boost {
+namespace beast {
+namespace http {
+
+template<class DynamicBuffer>
+struct basic_dynamic_body;
+
+} // http
+} // beast
+} // boost
+
+#endif
diff --git a/include/boost/beast/http/basic_file_body.hpp b/include/boost/beast/http/basic_file_body.hpp
index 28ecacf96c..43646df09d 100644
--- a/include/boost/beast/http/basic_file_body.hpp
+++ b/include/boost/beast/http/basic_file_body.hpp
@@ -10,6 +10,8 @@
 #ifndef BOOST_BEAST_HTTP_BASIC_FILE_BODY_HPP
 #define BOOST_BEAST_HTTP_BASIC_FILE_BODY_HPP
 
+#include <boost/beast/http/basic_file_body_fwd.hpp>
+
 #include <boost/beast/core/detail/config.hpp>
 #include <boost/beast/core/error.hpp>
 #include <boost/beast/core/file_base.hpp>
diff --git a/include/boost/beast/http/basic_file_body_fwd.hpp b/include/boost/beast/http/basic_file_body_fwd.hpp
new file mode 100644
index 0000000000..13b1af38fa
--- /dev/null
+++ b/include/boost/beast/http/basic_file_body_fwd.hpp
@@ -0,0 +1,24 @@
+//
+// Copyright (c) 2024 Mohammad Nejati
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+// Official repository: https://github.com/boostorg/beast
+//
+
+#ifndef BOOST_BEAST_HTTP_BASIC_FILE_BODY_FWD_HPP
+#define BOOST_BEAST_HTTP_BASIC_FILE_BODY_FWD_HPP
+
+namespace boost {
+namespace beast {
+namespace http {
+
+template<class File>
+struct basic_file_body;
+
+} // http
+} // beast
+} // boost
+
+#endif
diff --git a/include/boost/beast/http/buffer_body.hpp b/include/boost/beast/http/buffer_body.hpp
index 98768cb8a5..cd04f841c8 100644
--- a/include/boost/beast/http/buffer_body.hpp
+++ b/include/boost/beast/http/buffer_body.hpp
@@ -10,15 +10,15 @@
 #ifndef BOOST_BEAST_HTTP_BUFFER_BODY_HPP
 #define BOOST_BEAST_HTTP_BUFFER_BODY_HPP
 
-#include <boost/beast/core/detail/config.hpp>
+#include <boost/beast/http/buffer_body_fwd.hpp>
+
 #include <boost/beast/core/buffer_traits.hpp>
+#include <boost/beast/core/detail/config.hpp>
 #include <boost/beast/http/error.hpp>
 #include <boost/beast/http/message.hpp>
 #include <boost/beast/http/type_traits.hpp>
 #include <boost/optional.hpp>
-
 #include <cstdint>
-#include <type_traits>
 #include <utility>
 
 namespace boost {
diff --git a/include/boost/beast/http/buffer_body_fwd.hpp b/include/boost/beast/http/buffer_body_fwd.hpp
new file mode 100644
index 0000000000..66174d7a38
--- /dev/null
+++ b/include/boost/beast/http/buffer_body_fwd.hpp
@@ -0,0 +1,23 @@
+//
+// Copyright (c) 2024 Mohammad Nejati
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+// Official repository: https://github.com/boostorg/beast
+//
+
+#ifndef BOOST_BEAST_HTTP_BUFFER_BODY_FWD_HPP
+#define BOOST_BEAST_HTTP_BUFFER_BODY_FWD_HPP
+
+namespace boost {
+namespace beast {
+namespace http {
+
+struct buffer_body;
+
+} // http
+} // beast
+} // boost
+
+#endif
diff --git a/include/boost/beast/http/detail/type_traits.hpp b/include/boost/beast/http/detail/type_traits.hpp
index 1da4c4e414..a9b5d64088 100644
--- a/include/boost/beast/http/detail/type_traits.hpp
+++ b/include/boost/beast/http/detail/type_traits.hpp
@@ -11,22 +11,14 @@
 #define BOOST_BEAST_HTTP_DETAIL_TYPE_TRAITS_HPP
 
 #include <boost/beast/core/detail/type_traits.hpp>
+#include <boost/beast/http/message_fwd.hpp>
+#include <boost/beast/http/parser_fwd.hpp>
 #include <boost/optional.hpp>
 #include <cstdint>
 
 namespace boost {
 namespace beast {
 namespace http {
-
-template<bool isRequest, class Fields>
-class header;
-
-template<bool, class, class>
-class message;
-
-template<bool isRequest, class Body, class Fields>
-class parser;
-
 namespace detail {
 
 template<class T>
diff --git a/include/boost/beast/http/dynamic_body.hpp b/include/boost/beast/http/dynamic_body.hpp
index a55fff45ef..58aa1b602c 100644
--- a/include/boost/beast/http/dynamic_body.hpp
+++ b/include/boost/beast/http/dynamic_body.hpp
@@ -10,6 +10,8 @@
 #ifndef BOOST_BEAST_HTTP_DYNAMIC_BODY_HPP
 #define BOOST_BEAST_HTTP_DYNAMIC_BODY_HPP
 
+#include <boost/beast/http/dynamic_body_fwd.hpp>
+
 #include <boost/beast/core/multi_buffer.hpp>
 #include <boost/beast/http/basic_dynamic_body.hpp>
 
@@ -17,11 +19,13 @@ namespace boost {
 namespace beast {
 namespace http {
 
+#if BOOST_BEAST_DOXYGEN
 /** A dynamic message body represented by a @ref multi_buffer
 
     Meets the requirements of <em>Body</em>.
 */
 using dynamic_body = basic_dynamic_body<multi_buffer>;
+#endif
 
 } // http
 } // beast
diff --git a/include/boost/beast/http/dynamic_body_fwd.hpp b/include/boost/beast/http/dynamic_body_fwd.hpp
new file mode 100644
index 0000000000..8d758ea69d
--- /dev/null
+++ b/include/boost/beast/http/dynamic_body_fwd.hpp
@@ -0,0 +1,37 @@
+//
+// Copyright (c) 2024 Mohammad Nejati
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+// Official repository: https://github.com/boostorg/beast
+//
+
+#ifndef BOOST_BEAST_HTTP_DYNAMIC_BODY_FWD_HPP
+#define BOOST_BEAST_HTTP_DYNAMIC_BODY_FWD_HPP
+
+#include <boost/beast/http/basic_dynamic_body_fwd.hpp>
+
+#include <memory>
+
+namespace boost {
+namespace beast {
+
+#ifndef BOOST_BEAST_DOXYGEN
+template<class Allocator>
+class basic_multi_buffer;
+
+using multi_buffer = basic_multi_buffer<std::allocator<char>>;
+#endif
+
+namespace http {
+
+#ifndef BOOST_BEAST_DOXYGEN
+using dynamic_body = basic_dynamic_body<multi_buffer>;
+#endif
+
+} // http
+} // beast
+} // boost
+
+#endif
diff --git a/include/boost/beast/http/empty_body.hpp b/include/boost/beast/http/empty_body.hpp
index fb90e06192..e75a46ad42 100644
--- a/include/boost/beast/http/empty_body.hpp
+++ b/include/boost/beast/http/empty_body.hpp
@@ -10,6 +10,8 @@
 #ifndef BOOST_BEAST_HTTP_EMPTY_BODY_HPP
 #define BOOST_BEAST_HTTP_EMPTY_BODY_HPP
 
+#include <boost/beast/http/empty_body_fwd.hpp>
+
 #include <boost/beast/core/detail/config.hpp>
 #include <boost/beast/http/error.hpp>
 #include <boost/beast/http/message.hpp>
diff --git a/include/boost/beast/http/empty_body_fwd.hpp b/include/boost/beast/http/empty_body_fwd.hpp
new file mode 100644
index 0000000000..a25806c912
--- /dev/null
+++ b/include/boost/beast/http/empty_body_fwd.hpp
@@ -0,0 +1,23 @@
+//
+// Copyright (c) 2024 Mohammad Nejati
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+// Official repository: https://github.com/boostorg/beast
+//
+
+#ifndef BOOST_BEAST_HTTP_EMPTY_BODY_FWD_HPP
+#define BOOST_BEAST_HTTP_EMPTY_BODY_FWD_HPP
+
+namespace boost {
+namespace beast {
+namespace http {
+
+struct empty_body;
+
+} // http
+} // beast
+} // boost
+
+#endif
diff --git a/include/boost/beast/http/fields.hpp b/include/boost/beast/http/fields.hpp
index 787396de78..d799d3abda 100644
--- a/include/boost/beast/http/fields.hpp
+++ b/include/boost/beast/http/fields.hpp
@@ -10,6 +10,8 @@
 #ifndef BOOST_BEAST_HTTP_FIELDS_HPP
 #define BOOST_BEAST_HTTP_FIELDS_HPP
 
+#include <boost/beast/http/fields_fwd.hpp>
+
 #include <boost/beast/core/detail/allocator.hpp>
 #include <boost/beast/core/detail/config.hpp>
 #include <boost/beast/core/error.hpp>
@@ -20,11 +22,9 @@
 #include <boost/intrusive/list.hpp>
 #include <boost/intrusive/set.hpp>
 #include <boost/optional.hpp>
-#include <algorithm>
 #include <cctype>
 #include <cstring>
 #include <memory>
-#include <string>
 #include <type_traits>
 #include <utility>
 
@@ -864,8 +864,10 @@ class basic_fields
     string_view target_or_reason_;
 };
 
+#if BOOST_BEAST_DOXYGEN
 /// A typical HTTP header fields container
 using fields = basic_fields<std::allocator<char>>;
+#endif
 
 } // http
 } // beast
diff --git a/include/boost/beast/http/fields_fwd.hpp b/include/boost/beast/http/fields_fwd.hpp
new file mode 100644
index 0000000000..3849159ddf
--- /dev/null
+++ b/include/boost/beast/http/fields_fwd.hpp
@@ -0,0 +1,30 @@
+//
+// Copyright (c) 2024 Mohammad Nejati
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+// Official repository: https://github.com/boostorg/beast
+//
+
+#ifndef BOOST_BEAST_HTTP_FIELDS_FWD_HPP
+#define BOOST_BEAST_HTTP_FIELDS_FWD_HPP
+
+#include <memory>
+
+namespace boost {
+namespace beast {
+namespace http {
+
+template<class Allocator>
+class basic_fields;
+
+#ifndef BOOST_BEAST_DOXYGEN
+using fields = basic_fields<std::allocator<char>>;
+#endif
+
+} // http
+} // beast
+} // boost
+
+#endif
diff --git a/include/boost/beast/http/file_body.hpp b/include/boost/beast/http/file_body.hpp
index a78d7901de..08cbacb0de 100644
--- a/include/boost/beast/http/file_body.hpp
+++ b/include/boost/beast/http/file_body.hpp
@@ -10,21 +10,22 @@
 #ifndef BOOST_BEAST_HTTP_FILE_BODY_HPP
 #define BOOST_BEAST_HTTP_FILE_BODY_HPP
 
+#include <boost/beast/http/file_body_fwd.hpp>
+
 #include <boost/beast/core/file.hpp>
 #include <boost/beast/http/basic_file_body.hpp>
 #include <boost/assert.hpp>
 #include <boost/optional.hpp>
-#include <algorithm>
 #include <cstdio>
-#include <cstdint>
-#include <utility>
 
 namespace boost {
 namespace beast {
 namespace http {
 
+#if BOOST_BEAST_DOXYGEN
 /// A message body represented by a file on the filesystem.
 using file_body = basic_file_body<file>;
+#endif
 
 } // http
 } // beast
diff --git a/include/boost/beast/http/file_body_fwd.hpp b/include/boost/beast/http/file_body_fwd.hpp
new file mode 100644
index 0000000000..29e08777d6
--- /dev/null
+++ b/include/boost/beast/http/file_body_fwd.hpp
@@ -0,0 +1,29 @@
+//
+// Copyright (c) 2024 Mohammad Nejati
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+// Official repository: https://github.com/boostorg/beast
+//
+
+#ifndef BOOST_BEAST_HTTP_FILE_BODY_FWD_HPP
+#define BOOST_BEAST_HTTP_FILE_BODY_FWD_HPP
+
+#include <boost/beast/http/basic_file_body_fwd.hpp>
+
+#include <boost/beast/core/file.hpp>
+
+namespace boost {
+namespace beast {
+namespace http {
+
+#ifndef BOOST_BEAST_DOXYGEN
+using file_body = basic_file_body<file>;
+#endif
+
+} // http
+} // beast
+} // boost
+
+#endif
diff --git a/include/boost/beast/http/message.hpp b/include/boost/beast/http/message.hpp
index d10398263a..3c75ac26fe 100644
--- a/include/boost/beast/http/message.hpp
+++ b/include/boost/beast/http/message.hpp
@@ -10,20 +10,19 @@
 #ifndef BOOST_BEAST_HTTP_MESSAGE_HPP
 #define BOOST_BEAST_HTTP_MESSAGE_HPP
 
+#include <boost/beast/http/message_fwd.hpp>
+
 #include <boost/beast/core/detail/config.hpp>
+#include <boost/beast/core/string.hpp>
 #include <boost/beast/http/fields.hpp>
-#include <boost/beast/http/verb.hpp>
 #include <boost/beast/http/status.hpp>
 #include <boost/beast/http/type_traits.hpp>
-#include <boost/beast/core/string.hpp>
+#include <boost/beast/http/verb.hpp>
+#include <boost/assert.hpp>
 #include <boost/core/empty_value.hpp>
 #include <boost/mp11/integer_sequence.hpp>
-#include <boost/assert.hpp>
 #include <boost/optional.hpp>
 #include <boost/throw_exception.hpp>
-#include <memory>
-#include <stdexcept>
-#include <string>
 #include <tuple>
 #include <utility>
 
@@ -48,11 +47,7 @@ namespace http {
 #if BOOST_BEAST_DOXYGEN
 template<bool isRequest, class Fields = fields>
 class header : public Fields
-
 #else
-template<bool isRequest, class Fields = fields>
-class header;
-
 template<class Fields>
 class header<true, Fields> : public Fields
 #endif
@@ -445,6 +440,7 @@ class header<false, Fields> : public Fields
 #endif
 };
 
+#if BOOST_BEAST_DOXYGEN
 /// A typical HTTP request header
 template<class Fields = fields>
 using request_header = header<true, Fields>;
@@ -452,6 +448,7 @@ using request_header = header<true, Fields>;
 /// A typical HTTP response header
 template<class Fields = fields>
 using response_header = header<false, Fields>;
+#endif
 
 #if defined(BOOST_MSVC)
 // Workaround for MSVC bug with private base classes
@@ -490,7 +487,11 @@ using value_type_t = typename T::value_type;
     @tparam Fields The type of container used to hold the
     field value pairs.
 */
+#if BOOST_BEAST_DOXYGEN
 template<bool isRequest, class Body, class Fields = fields>
+#else
+template<bool isRequest, class Body, class Fields>
+#endif
 class message
     : public header<isRequest, Fields>
 #if ! BOOST_BEAST_DOXYGEN
@@ -972,6 +973,7 @@ class message
     prepare_payload(std::false_type);
 };
 
+#if BOOST_BEAST_DOXYGEN
 /// A typical HTTP request
 template<class Body, class Fields = fields>
 using request = message<true, Body, Fields>;
@@ -979,6 +981,7 @@ using request = message<true, Body, Fields>;
 /// A typical HTTP response
 template<class Body, class Fields = fields>
 using response = message<false, Body, Fields>;
+#endif
 
 //------------------------------------------------------------------------------
 
diff --git a/include/boost/beast/http/message_fwd.hpp b/include/boost/beast/http/message_fwd.hpp
new file mode 100644
index 0000000000..ec05482744
--- /dev/null
+++ b/include/boost/beast/http/message_fwd.hpp
@@ -0,0 +1,43 @@
+//
+// Copyright (c) 2024 Mohammad Nejati
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+// Official repository: https://github.com/boostorg/beast
+//
+
+#ifndef BOOST_BEAST_HTTP_MESSAGE_FWD_HPP
+#define BOOST_BEAST_HTTP_MESSAGE_FWD_HPP
+
+#include <boost/beast/http/fields_fwd.hpp>
+
+namespace boost {
+namespace beast {
+namespace http {
+
+#ifndef BOOST_BEAST_DOXYGEN
+template<bool isRequest, class Fields = fields>
+class header;
+
+template<bool isRequest, class Body, class Fields = fields>
+class message;
+
+template<class Fields = fields>
+using request_header = header<true, Fields>;
+
+template<class Fields = fields>
+using response_header = header<false, Fields>;
+
+template<class Body, class Fields = fields>
+using request = message<true, Body, Fields>;
+
+template<class Body, class Fields = fields>
+using response = message<false, Body, Fields>;
+#endif
+
+} // http
+} // beast
+} // boost
+
+#endif
diff --git a/include/boost/beast/http/message_generator.hpp b/include/boost/beast/http/message_generator.hpp
index b4af27678b..b81184b901 100644
--- a/include/boost/beast/http/message_generator.hpp
+++ b/include/boost/beast/http/message_generator.hpp
@@ -9,6 +9,8 @@
 #ifndef BOOST_BEAST_HTTP_MESSAGE_GENERATOR_HPP
 #define BOOST_BEAST_HTTP_MESSAGE_GENERATOR_HPP
 
+#include <boost/beast/http/message_generator_fwd.hpp>
+
 #include <boost/beast/core/span.hpp>
 #include <boost/beast/http/message.hpp>
 #include <boost/beast/http/serializer.hpp>
diff --git a/include/boost/beast/http/message_generator_fwd.hpp b/include/boost/beast/http/message_generator_fwd.hpp
new file mode 100644
index 0000000000..c6721bb78f
--- /dev/null
+++ b/include/boost/beast/http/message_generator_fwd.hpp
@@ -0,0 +1,23 @@
+//
+// Copyright (c) 2024 Mohammad Nejati
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+// Official repository: https://github.com/boostorg/beast
+//
+
+#ifndef BOOST_BEAST_HTTP_MESSAGE_GENERATOR_FWD_HPP
+#define BOOST_BEAST_HTTP_MESSAGE_GENERATOR_FWD_HPP
+
+namespace boost {
+namespace beast {
+namespace http {
+
+class message_generator;
+
+} // http
+} // beast
+} // boost
+
+#endif
diff --git a/include/boost/beast/http/parser.hpp b/include/boost/beast/http/parser.hpp
index a5b93d17d4..76954adbc1 100644
--- a/include/boost/beast/http/parser.hpp
+++ b/include/boost/beast/http/parser.hpp
@@ -10,6 +10,8 @@
 #ifndef BOOST_BEAST_HTTP_PARSER_HPP
 #define BOOST_BEAST_HTTP_PARSER_HPP
 
+#include <boost/beast/http/parser_fwd.hpp>
+
 #include <boost/beast/core/detail/config.hpp>
 #include <boost/beast/http/basic_parser.hpp>
 #include <boost/beast/http/message.hpp>
@@ -43,10 +45,17 @@ namespace http {
 
     @note A new instance of the parser is required for each message.
 */
+#if BOOST_BEAST_DOXYGEN
 template<
     bool isRequest,
     class Body,
     class Allocator = std::allocator<char>>
+#else
+template<
+    bool isRequest,
+    class Body,
+    class Allocator>
+#endif
 class parser
     : public basic_parser<isRequest>
 {
@@ -489,6 +498,7 @@ class parser
     }
 };
 
+#if BOOST_BEAST_DOXYGEN
 /// An HTTP/1 parser for producing a request message.
 template<class Body, class Allocator = std::allocator<char>>
 using request_parser = parser<true, Body, Allocator>;
@@ -496,6 +506,7 @@ using request_parser = parser<true, Body, Allocator>;
 /// An HTTP/1 parser for producing a response message.
 template<class Body, class Allocator = std::allocator<char>>
 using response_parser = parser<false, Body, Allocator>;
+#endif
 
 } // http
 } // beast
diff --git a/include/boost/beast/http/parser_fwd.hpp b/include/boost/beast/http/parser_fwd.hpp
new file mode 100644
index 0000000000..47a5e84e37
--- /dev/null
+++ b/include/boost/beast/http/parser_fwd.hpp
@@ -0,0 +1,37 @@
+//
+// Copyright (c) 2024 Mohammad Nejati
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+// Official repository: https://github.com/boostorg/beast
+//
+
+#ifndef BOOST_BEAST_HTTP_PARSER_FWD_HPP
+#define BOOST_BEAST_HTTP_PARSER_FWD_HPP
+
+#include <memory>
+
+namespace boost {
+namespace beast {
+namespace http {
+
+#ifndef BOOST_BEAST_DOXYGEN
+template<
+    bool isRequest,
+    class Body,
+    class Allocator = std::allocator<char>>
+class parser;
+
+template<class Body, class Allocator = std::allocator<char>>
+using request_parser = parser<true, Body, Allocator>;
+
+template<class Body, class Allocator = std::allocator<char>>
+using response_parser = parser<false, Body, Allocator>;
+#endif
+
+} // http
+} // beast
+} // boost
+
+#endif
diff --git a/include/boost/beast/http/serializer.hpp b/include/boost/beast/http/serializer.hpp
index 229554ddb0..1813fa58e9 100644
--- a/include/boost/beast/http/serializer.hpp
+++ b/include/boost/beast/http/serializer.hpp
@@ -10,14 +10,16 @@
 #ifndef BOOST_BEAST_HTTP_SERIALIZER_HPP
 #define BOOST_BEAST_HTTP_SERIALIZER_HPP
 
-#include <boost/beast/core/detail/config.hpp>
+#include <boost/beast/http/serializer_fwd.hpp>
+
 #include <boost/beast/core/buffers_cat.hpp>
 #include <boost/beast/core/buffers_prefix.hpp>
 #include <boost/beast/core/buffers_suffix.hpp>
-#include <boost/beast/core/string.hpp>
+#include <boost/beast/core/detail/config.hpp>
 #include <boost/beast/core/detail/variant.hpp>
-#include <boost/beast/http/message.hpp>
+#include <boost/beast/core/string.hpp>
 #include <boost/beast/http/chunk_encode.hpp>
+#include <boost/beast/http/message.hpp>
 #include <boost/asio/buffer.hpp>
 #include <boost/optional.hpp>
 
@@ -57,10 +59,11 @@ namespace http {
 
     @tparam Fields The type of fields in the message.
 */
-template<
-    bool isRequest,
-    class Body,
-    class Fields = fields>
+#if BOOST_BEAST_DOXYGEN
+template<bool isRequest, class Body, class Fields = fields>
+#else
+template<bool isRequest, class Body, class Fields>
+#endif
 class serializer
 {
 public:
@@ -377,6 +380,7 @@ class serializer
     }
 };
 
+#if BOOST_BEAST_DOXYGEN
 /// A serializer for HTTP/1 requests
 template<class Body, class Fields = fields>
 using request_serializer = serializer<true, Body, Fields>;
@@ -384,6 +388,7 @@ using request_serializer = serializer<true, Body, Fields>;
 /// A serializer for HTTP/1 responses
 template<class Body, class Fields = fields>
 using response_serializer = serializer<false, Body, Fields>;
+#endif
 
 } // http
 } // beast
diff --git a/include/boost/beast/http/serializer_fwd.hpp b/include/boost/beast/http/serializer_fwd.hpp
new file mode 100644
index 0000000000..3abb04ee5c
--- /dev/null
+++ b/include/boost/beast/http/serializer_fwd.hpp
@@ -0,0 +1,34 @@
+//
+// Copyright (c) 2024 Mohammad Nejati
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+// Official repository: https://github.com/boostorg/beast
+//
+
+#ifndef BOOST_BEAST_HTTP_SERIALIZER_FWD_HPP
+#define BOOST_BEAST_HTTP_SERIALIZER_FWD_HPP
+
+#include <boost/beast/http/fields_fwd.hpp>
+
+namespace boost {
+namespace beast {
+namespace http {
+
+#ifndef BOOST_BEAST_DOXYGEN
+template<bool isRequest, class Body, class Fields = fields>
+class serializer;
+
+template<class Body, class Fields = fields>
+using request_serializer = serializer<true, Body, Fields>;
+
+template<class Body, class Fields = fields>
+using response_serializer = serializer<false, Body, Fields>;
+#endif
+
+} // http
+} // beast
+} // boost
+
+#endif
diff --git a/include/boost/beast/http/span_body.hpp b/include/boost/beast/http/span_body.hpp
index 344d8d8506..98cda9826f 100644
--- a/include/boost/beast/http/span_body.hpp
+++ b/include/boost/beast/http/span_body.hpp
@@ -10,8 +10,10 @@
 #ifndef BOOST_BEAST_HTTP_SPAN_BODY_HPP
 #define BOOST_BEAST_HTTP_SPAN_BODY_HPP
 
-#include <boost/beast/core/detail/config.hpp>
+#include <boost/beast/http/span_body_fwd.hpp>
+
 #include <boost/beast/core/buffer_traits.hpp>
+#include <boost/beast/core/detail/config.hpp>
 #include <boost/beast/core/span.hpp>
 #include <boost/beast/http/error.hpp>
 #include <boost/beast/http/message.hpp>
diff --git a/include/boost/beast/http/span_body_fwd.hpp b/include/boost/beast/http/span_body_fwd.hpp
new file mode 100644
index 0000000000..e04b9c1e49
--- /dev/null
+++ b/include/boost/beast/http/span_body_fwd.hpp
@@ -0,0 +1,24 @@
+//
+// Copyright (c) 2024 Mohammad Nejati
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+// Official repository: https://github.com/boostorg/beast
+//
+
+#ifndef BOOST_BEAST_HTTP_SPAN_BODY_FWD_HPP
+#define BOOST_BEAST_HTTP_SPAN_BODY_FWD_HPP
+
+namespace boost {
+namespace beast {
+namespace http {
+
+template<class T>
+struct span_body;
+
+} // http
+} // beast
+} // boost
+
+#endif
diff --git a/include/boost/beast/http/string_body.hpp b/include/boost/beast/http/string_body.hpp
index b306312219..a2545a4271 100644
--- a/include/boost/beast/http/string_body.hpp
+++ b/include/boost/beast/http/string_body.hpp
@@ -10,18 +10,17 @@
 #ifndef BOOST_BEAST_HTTP_STRING_BODY_HPP
 #define BOOST_BEAST_HTTP_STRING_BODY_HPP
 
-#include <boost/beast/core/detail/config.hpp>
+#include <boost/beast/http/string_body_fwd.hpp>
+
 #include <boost/beast/core/buffer_traits.hpp>
-#include <boost/beast/http/error.hpp>
-#include <boost/beast/http/message.hpp>
 #include <boost/beast/core/buffers_range.hpp>
 #include <boost/beast/core/detail/clamp.hpp>
+#include <boost/beast/core/detail/config.hpp>
+#include <boost/beast/http/error.hpp>
+#include <boost/beast/http/message.hpp>
 #include <boost/asio/buffer.hpp>
 #include <boost/optional.hpp>
 #include <cstdint>
-#include <limits>
-#include <memory>
-#include <stdexcept>
 #include <string>
 #include <utility>
 
@@ -35,10 +34,17 @@ namespace http {
     for holding message payloads. Messages using this body type
     may be serialized and parsed.
 */
+#if BOOST_BEAST_DOXYGEN
 template<
     class CharT,
     class Traits = std::char_traits<CharT>,
     class Allocator = std::allocator<CharT>>
+#else
+template<
+    class CharT,
+    class Traits,
+    class Allocator>
+#endif
 struct basic_string_body
 {
 private:
@@ -176,8 +182,10 @@ struct basic_string_body
 #endif
 };
 
+#if BOOST_BEAST_DOXYGEN
 /// A <em>Body</em> using `std::string`
 using string_body = basic_string_body<char>;
+#endif
 
 } // http
 } // beast
diff --git a/include/boost/beast/http/string_body_fwd.hpp b/include/boost/beast/http/string_body_fwd.hpp
new file mode 100644
index 0000000000..9a39fa4a7d
--- /dev/null
+++ b/include/boost/beast/http/string_body_fwd.hpp
@@ -0,0 +1,34 @@
+//
+// Copyright (c) 2024 Mohammad Nejati
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+// Official repository: https://github.com/boostorg/beast
+//
+
+#ifndef BOOST_BEAST_HTTP_STRING_BODY_FWD_HPP
+#define BOOST_BEAST_HTTP_STRING_BODY_FWD_HPP
+
+#include <memory>
+#include <string>
+
+namespace boost {
+namespace beast {
+namespace http {
+
+#ifndef BOOST_BEAST_DOXYGEN
+template<
+    class CharT,
+    class Traits = std::char_traits<CharT>,
+    class Allocator = std::allocator<CharT>>
+struct basic_string_body;
+
+using string_body = basic_string_body<char>;
+#endif
+
+} // http
+} // beast
+} // boost
+
+#endif
diff --git a/include/boost/beast/http/type_traits.hpp b/include/boost/beast/http/type_traits.hpp
index 843e9a91b4..3afd76f620 100644
--- a/include/boost/beast/http/type_traits.hpp
+++ b/include/boost/beast/http/type_traits.hpp
@@ -24,9 +24,6 @@ namespace boost {
 namespace beast {
 namespace http {
 
-template<bool, class, class>
-class message;
-
 /** Determine if a type meets the <em>Body</em> named requirements.
 
     This alias template is `std::true_type` if `T` meets
diff --git a/include/boost/beast/http/vector_body.hpp b/include/boost/beast/http/vector_body.hpp
index 4665b00bd7..e685f64c3c 100644
--- a/include/boost/beast/http/vector_body.hpp
+++ b/include/boost/beast/http/vector_body.hpp
@@ -10,19 +10,18 @@
 #ifndef BOOST_BEAST_HTTP_VECTOR_BODY_HPP
 #define BOOST_BEAST_HTTP_VECTOR_BODY_HPP
 
-#include <boost/beast/core/detail/config.hpp>
+#include <boost/beast/http/vector_body_fwd.hpp>
+
 #include <boost/beast/core/buffer_traits.hpp>
+#include <boost/beast/core/detail/clamp.hpp>
+#include <boost/beast/core/detail/config.hpp>
 #include <boost/beast/http/error.hpp>
 #include <boost/beast/http/message.hpp>
-#include <boost/beast/core/detail/clamp.hpp>
 #include <boost/asio/buffer.hpp>
 #include <boost/optional.hpp>
 #include <cstdint>
-#include <limits>
-#include <memory>
-#include <stdexcept>
-#include <string>
 #include <utility>
+#include <vector>
 
 namespace boost {
 namespace beast {
@@ -34,7 +33,11 @@ namespace http {
     for holding message payloads. Messages using this body type
     may be serialized and parsed.
 */
+#if BOOST_BEAST_DOXYGEN
 template<class T, class Allocator = std::allocator<T>>
+#else
+template<class T, class Allocator>
+#endif
 struct vector_body
 {
 private:
diff --git a/include/boost/beast/http/vector_body_fwd.hpp b/include/boost/beast/http/vector_body_fwd.hpp
new file mode 100644
index 0000000000..081796ef78
--- /dev/null
+++ b/include/boost/beast/http/vector_body_fwd.hpp
@@ -0,0 +1,26 @@
+//
+// Copyright (c) 2024 Mohammad Nejati
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+// Official repository: https://github.com/boostorg/beast
+//
+
+#ifndef BOOST_BEAST_HTTP_VECTOR_BODY_FWD_HPP
+#define BOOST_BEAST_HTTP_VECTOR_BODY_FWD_HPP
+
+#include <memory>
+
+namespace boost {
+namespace beast {
+namespace http {
+
+template<class T, class Allocator = std::allocator<T>>
+struct vector_body;
+
+} // http
+} // beast
+} // boost
+
+#endif
diff --git a/test/beast/http/CMakeLists.txt b/test/beast/http/CMakeLists.txt
index cd4b49ec1c..d9e1cd88d5 100644
--- a/test/beast/http/CMakeLists.txt
+++ b/test/beast/http/CMakeLists.txt
@@ -16,31 +16,43 @@ add_executable (tests-beast-http
     ${EXTRAS_FILES}
     Jamfile
     any_completion_handler.cpp
-    message_fuzz.hpp
-    test_parser.hpp
+    basic_dynamic_body_fwd.cpp
     basic_dynamic_body.cpp
+    basic_file_body_fwd.cpp
     basic_file_body.cpp
     basic_parser.cpp
+    buffer_body_fwd.cpp
     buffer_body.cpp
     chunk_encode.cpp
     deferred.cpp
+    dynamic_body_fwd.cpp
     dynamic_body.cpp
+    empty_body_fwd.cpp
     empty_body.cpp
     error.cpp
-    field.cpp
     field_compiles.cpp
+    field.cpp
+    fields_fwd.cpp
     fields.cpp
+    file_body_fwd.cpp
     file_body.cpp
+    message_fwd.cpp
+    message_generator_fwd.cpp
     message_generator.cpp
     message.cpp
+    parser_fwd.cpp
     parser.cpp
     read.cpp
     rfc7230.cpp
+    serializer_fwd.cpp
     serializer.cpp
+    span_body_fwd.cpp
     span_body.cpp
     status.cpp
+    string_body_fwd.cpp
     string_body.cpp
     type_traits.cpp
+    vector_body_fwd.cpp
     vector_body.cpp
     verb.cpp
     write.cpp
diff --git a/test/beast/http/Jamfile b/test/beast/http/Jamfile
index 487be1abbf..6d377cf54d 100644
--- a/test/beast/http/Jamfile
+++ b/test/beast/http/Jamfile
@@ -9,28 +9,43 @@
 
 local SOURCES =
     any_completion_handler.cpp
+    basic_dynamic_body_fwd.cpp
     basic_dynamic_body.cpp
+    basic_file_body_fwd.cpp
     basic_file_body.cpp
     basic_parser.cpp
+    buffer_body_fwd.cpp
     buffer_body.cpp
     chunk_encode.cpp
     deferred.cpp
+    dynamic_body_fwd.cpp
     dynamic_body.cpp
+    empty_body_fwd.cpp
+    empty_body.cpp
     error.cpp
-    field.cpp
     field_compiles.cpp
+    field.cpp
+    fields_fwd.cpp
     fields.cpp
+    file_body_fwd.cpp
     file_body.cpp
+    message_fwd.cpp
+    message_generator_fwd.cpp
     message_generator.cpp
     message.cpp
+    parser_fwd.cpp
     parser.cpp
     read.cpp
     rfc7230.cpp
+    serializer_fwd.cpp
     serializer.cpp
+    span_body_fwd.cpp
     span_body.cpp
     status.cpp
+    string_body_fwd.cpp
     string_body.cpp
     type_traits.cpp
+    vector_body_fwd.cpp
     vector_body.cpp
     verb.cpp
     write.cpp
diff --git a/test/beast/http/basic_dynamic_body_fwd.cpp b/test/beast/http/basic_dynamic_body_fwd.cpp
new file mode 100644
index 0000000000..5cf30f85f1
--- /dev/null
+++ b/test/beast/http/basic_dynamic_body_fwd.cpp
@@ -0,0 +1,11 @@
+//
+// Copyright (c) 2024 Mohammad Nejati
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+// Official repository: https://github.com/boostorg/beast
+//
+
+// Test that header file is self-contained.
+#include <boost/beast/http/basic_dynamic_body_fwd.hpp>
diff --git a/test/beast/http/basic_file_body_fwd.cpp b/test/beast/http/basic_file_body_fwd.cpp
new file mode 100644
index 0000000000..cb10bfe261
--- /dev/null
+++ b/test/beast/http/basic_file_body_fwd.cpp
@@ -0,0 +1,11 @@
+//
+// Copyright (c) 2024 Mohammad Nejati
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+// Official repository: https://github.com/boostorg/beast
+//
+
+// Test that header file is self-contained.
+#include <boost/beast/http/basic_file_body_fwd.hpp>
diff --git a/test/beast/http/buffer_body_fwd.cpp b/test/beast/http/buffer_body_fwd.cpp
new file mode 100644
index 0000000000..d9e145dda2
--- /dev/null
+++ b/test/beast/http/buffer_body_fwd.cpp
@@ -0,0 +1,11 @@
+//
+// Copyright (c) 2024 Mohammad Nejati
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+// Official repository: https://github.com/boostorg/beast
+//
+
+// Test that header file is self-contained.
+#include <boost/beast/http/buffer_body_fwd.hpp>
diff --git a/test/beast/http/dynamic_body_fwd.cpp b/test/beast/http/dynamic_body_fwd.cpp
new file mode 100644
index 0000000000..c0c43b215b
--- /dev/null
+++ b/test/beast/http/dynamic_body_fwd.cpp
@@ -0,0 +1,11 @@
+//
+// Copyright (c) 2024 Mohammad Nejati
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+// Official repository: https://github.com/boostorg/beast
+//
+
+// Test that header file is self-contained.
+#include <boost/beast/http/dynamic_body_fwd.hpp>
diff --git a/test/beast/http/empty_body.cpp b/test/beast/http/empty_body.cpp
index 96db2bc9d8..771eae0080 100644
--- a/test/beast/http/empty_body.cpp
+++ b/test/beast/http/empty_body.cpp
@@ -10,6 +10,8 @@
 // Test that header file is self-contained.
 #include <boost/beast/http/empty_body.hpp>
 
+#include <boost/beast/http/type_traits.hpp>
+
 namespace boost {
 namespace beast {
 namespace http {
diff --git a/test/beast/http/empty_body_fwd.cpp b/test/beast/http/empty_body_fwd.cpp
new file mode 100644
index 0000000000..2b8dc06f3e
--- /dev/null
+++ b/test/beast/http/empty_body_fwd.cpp
@@ -0,0 +1,11 @@
+//
+// Copyright (c) 2024 Mohammad Nejati
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+// Official repository: https://github.com/boostorg/beast
+//
+
+// Test that header file is self-contained.
+#include <boost/beast/http/empty_body_fwd.hpp>
diff --git a/test/beast/http/fields_fwd.cpp b/test/beast/http/fields_fwd.cpp
new file mode 100644
index 0000000000..9cc516abd9
--- /dev/null
+++ b/test/beast/http/fields_fwd.cpp
@@ -0,0 +1,11 @@
+//
+// Copyright (c) 2024 Mohammad Nejati
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+// Official repository: https://github.com/boostorg/beast
+//
+
+// Test that header file is self-contained.
+#include <boost/beast/http/fields_fwd.hpp>
diff --git a/test/beast/http/file_body_fwd.cpp b/test/beast/http/file_body_fwd.cpp
new file mode 100644
index 0000000000..dbd79c23b3
--- /dev/null
+++ b/test/beast/http/file_body_fwd.cpp
@@ -0,0 +1,11 @@
+//
+// Copyright (c) 2024 Mohammad Nejati
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+// Official repository: https://github.com/boostorg/beast
+//
+
+// Test that header file is self-contained.
+#include <boost/beast/http/file_body_fwd.hpp>
diff --git a/test/beast/http/message_fwd.cpp b/test/beast/http/message_fwd.cpp
new file mode 100644
index 0000000000..71065ccdfe
--- /dev/null
+++ b/test/beast/http/message_fwd.cpp
@@ -0,0 +1,11 @@
+//
+// Copyright (c) 2024 Mohammad Nejati
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+// Official repository: https://github.com/boostorg/beast
+//
+
+// Test that header file is self-contained.
+#include <boost/beast/http/message_fwd.hpp>
diff --git a/test/beast/http/message_generator_fwd.cpp b/test/beast/http/message_generator_fwd.cpp
new file mode 100644
index 0000000000..71ea220bda
--- /dev/null
+++ b/test/beast/http/message_generator_fwd.cpp
@@ -0,0 +1,11 @@
+//
+// Copyright (c) 2024 Mohammad Nejati
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+// Official repository: https://github.com/boostorg/beast
+//
+
+// Test that header file is self-contained.
+#include <boost/beast/http/message_generator_fwd.hpp>
diff --git a/test/beast/http/parser_fwd.cpp b/test/beast/http/parser_fwd.cpp
new file mode 100644
index 0000000000..27e64511e0
--- /dev/null
+++ b/test/beast/http/parser_fwd.cpp
@@ -0,0 +1,11 @@
+//
+// Copyright (c) 2024 Mohammad Nejati
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+// Official repository: https://github.com/boostorg/beast
+//
+
+// Test that header file is self-contained.
+#include <boost/beast/http/parser_fwd.hpp>
diff --git a/test/beast/http/serializer_fwd.cpp b/test/beast/http/serializer_fwd.cpp
new file mode 100644
index 0000000000..8b6a2678ac
--- /dev/null
+++ b/test/beast/http/serializer_fwd.cpp
@@ -0,0 +1,11 @@
+//
+// Copyright (c) 2024 Mohammad Nejati
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+// Official repository: https://github.com/boostorg/beast
+//
+
+// Test that header file is self-contained.
+#include <boost/beast/http/serializer_fwd.hpp>
diff --git a/test/beast/http/span_body.cpp b/test/beast/http/span_body.cpp
index ab75857be0..ef3d284b37 100644
--- a/test/beast/http/span_body.cpp
+++ b/test/beast/http/span_body.cpp
@@ -10,9 +10,10 @@
 // Test that header file is self-contained.
 #include <boost/beast/http/span_body.hpp>
 
+#include <boost/beast/_experimental/unit_test/suite.hpp>
 #include <boost/beast/core/buffer_traits.hpp>
 #include <boost/beast/http/message.hpp>
-#include <boost/beast/_experimental/unit_test/suite.hpp>
+#include <boost/beast/http/type_traits.hpp>
 
 namespace boost {
 namespace beast {
diff --git a/test/beast/http/span_body_fwd.cpp b/test/beast/http/span_body_fwd.cpp
new file mode 100644
index 0000000000..6ab7c1a794
--- /dev/null
+++ b/test/beast/http/span_body_fwd.cpp
@@ -0,0 +1,11 @@
+//
+// Copyright (c) 2024 Mohammad Nejati
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+// Official repository: https://github.com/boostorg/beast
+//
+
+// Test that header file is self-contained.
+#include <boost/beast/http/span_body_fwd.hpp>
diff --git a/test/beast/http/string_body.cpp b/test/beast/http/string_body.cpp
index 14f873b5f4..9b5e8aa6e0 100644
--- a/test/beast/http/string_body.cpp
+++ b/test/beast/http/string_body.cpp
@@ -10,6 +10,8 @@
 // Test that header file is self-contained.
 #include <boost/beast/http/string_body.hpp>
 
+#include <boost/beast/http/type_traits.hpp>
+
 namespace boost {
 namespace beast {
 namespace http {
diff --git a/test/beast/http/string_body_fwd.cpp b/test/beast/http/string_body_fwd.cpp
new file mode 100644
index 0000000000..332ec00200
--- /dev/null
+++ b/test/beast/http/string_body_fwd.cpp
@@ -0,0 +1,11 @@
+//
+// Copyright (c) 2024 Mohammad Nejati
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+// Official repository: https://github.com/boostorg/beast
+//
+
+// Test that header file is self-contained.
+#include <boost/beast/http/string_body_fwd.hpp>
diff --git a/test/beast/http/type_traits.cpp b/test/beast/http/type_traits.cpp
index fef17fb69e..e68d1b4b04 100644
--- a/test/beast/http/type_traits.cpp
+++ b/test/beast/http/type_traits.cpp
@@ -11,6 +11,7 @@
 #include <boost/beast/http/type_traits.hpp>
 
 #include <boost/beast/http/empty_body.hpp>
+#include <boost/beast/http/message.hpp>
 #include <boost/beast/http/string_body.hpp>
 #include <boost/beast/core/buffer_traits.hpp>
 #include <boost/beast/core/buffers_cat.hpp>
diff --git a/test/beast/http/vector_body.cpp b/test/beast/http/vector_body.cpp
index 142d17e186..14a57718cb 100644
--- a/test/beast/http/vector_body.cpp
+++ b/test/beast/http/vector_body.cpp
@@ -9,6 +9,9 @@
 
 // Test that header file is self-contained.
 #include <boost/beast/http/vector_body.hpp>
+
+#include <boost/beast/http/type_traits.hpp>
+
 #include <cstddef>
 
 namespace boost {
diff --git a/test/beast/http/vector_body_fwd.cpp b/test/beast/http/vector_body_fwd.cpp
new file mode 100644
index 0000000000..a02bb9289a
--- /dev/null
+++ b/test/beast/http/vector_body_fwd.cpp
@@ -0,0 +1,11 @@
+//
+// Copyright (c) 2024 Mohammad Nejati
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+// Official repository: https://github.com/boostorg/beast
+//
+
+// Test that header file is self-contained.
+#include <boost/beast/http/vector_body_fwd.hpp>