diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7f707fa..1282b01 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1 +1,4 @@
-cmake_minimum_required(VERSION 3.0)
\ No newline at end of file
+cmake_minimum_required(VERSION 3.0)
+project(llo-stage-one)
+add_subdirectory(demo/)
+add_library(${PROJECT_NAME} src/deconstructor.cpp)
\ No newline at end of file
diff --git a/demo/CMakeLists.txt b/demo/CMakeLists.txt
new file mode 100644
index 0000000..1185f49
--- /dev/null
+++ b/demo/CMakeLists.txt
@@ -0,0 +1,14 @@
+cmake_minimum_required(VERSION 3.0)
+project(llo-stage-one-demo)
+
+set(CMAKE_CXX_STANDARD 20)
+set(CMAKE_CXX_FLAGS -Winvalid-constexpr)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+set(CMAKE_CXX_EXTENSIONS OFF)
+
+if(MSVC)
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /std:c++17")
+endif(MSVC)
+
+include_directories(dependencies/cli-parser/ dependencies/linux-pe/includes/)
+add_executable(${PROJECT_NAME} src/main.cpp)
\ No newline at end of file
diff --git a/demo/src/main.cpp b/demo/src/main.cpp
new file mode 100644
index 0000000..0289977
--- /dev/null
+++ b/demo/src/main.cpp
@@ -0,0 +1,30 @@
+#include <iostream>
+#include "cli-parser.hpp"
+#include "linuxpe"
+
+int main(int argc, const char** argv)
+{
+    argparse::argument_parser_t cli_parser("llo-stage-one demo", "CLI, LLO, stage one demo...");
+    cli_parser
+        .add_argument()
+        .names({"-i", "--input"})
+        .required(true)
+        .description("input file, must be a file format supported by stage one modules...");
+    
+    cli_parser.enable_help();
+    auto err = cli_parser.parse(argc, argv);
+
+    if (err)
+    {
+        std::cout << err << std::endl;
+        return -1;
+    }
+
+    if ( cli_parser.exists( "help" ) )
+    {
+        cli_parser.print_help();
+        return 0;
+    }
+
+    // win::dos_header_t image_dos;
+}
\ No newline at end of file
diff --git a/include/deconstructor.hpp b/include/deconstructor.hpp
index d7a976c..06308fb 100644
--- a/include/deconstructor.hpp
+++ b/include/deconstructor.hpp
@@ -5,6 +5,6 @@ namespace llo::s1
     class dctor_base_t
     {
         public:
-            dctor_base_t();
+        
     };
 }
\ No newline at end of file