diff --git a/.clang-format b/.clang-format
new file mode 100644
index 0000000..032138d
--- /dev/null
+++ b/.clang-format
@@ -0,0 +1,66 @@
+# Generated from CLion C/C++ Code Style settings
+BasedOnStyle: LLVM
+AccessModifierOffset: -4
+AlignAfterOpenBracket: Align
+AlignConsecutiveAssignments: None
+AlignOperands: Align
+AllowAllArgumentsOnNextLine: false
+AllowAllConstructorInitializersOnNextLine: false
+AllowAllParametersOfDeclarationOnNextLine: false
+AllowShortBlocksOnASingleLine: Always
+AllowShortCaseLabelsOnASingleLine: false
+AllowShortFunctionsOnASingleLine: All
+AllowShortIfStatementsOnASingleLine: Always
+AllowShortLambdasOnASingleLine: All
+AllowShortLoopsOnASingleLine: true
+AlwaysBreakAfterReturnType: None
+AlwaysBreakTemplateDeclarations: Yes
+BreakBeforeBraces: Custom
+BraceWrapping:
+  AfterCaseLabel: false
+  AfterClass: true
+  AfterControlStatement: Always
+  AfterEnum: true
+  AfterFunction: true
+  AfterNamespace: true
+  AfterUnion: true
+  BeforeCatch: false
+  BeforeElse: true
+  IndentBraces: false
+  SplitEmptyFunction: false
+  SplitEmptyRecord: true
+BreakBeforeBinaryOperators: None
+BreakBeforeTernaryOperators: true
+BreakConstructorInitializers: BeforeColon
+BreakInheritanceList: BeforeColon
+ColumnLimit: 0
+CompactNamespaces: false
+ContinuationIndentWidth: 8
+IndentCaseLabels: false
+IndentPPDirectives: None
+IndentWidth: 4
+KeepEmptyLinesAtTheStartOfBlocks: true
+MaxEmptyLinesToKeep: 2
+NamespaceIndentation: None
+ObjCSpaceAfterProperty: false
+ObjCSpaceBeforeProtocolList: true
+PointerAlignment: Left
+ReflowComments: false
+SpaceAfterCStyleCast: true
+SpaceAfterLogicalNot: false
+SpaceAfterTemplateKeyword: false
+SpaceBeforeAssignmentOperators: true
+SpaceBeforeCpp11BracedList: false
+SpaceBeforeCtorInitializerColon: true
+SpaceBeforeInheritanceColon: true
+SpaceBeforeParens: ControlStatements
+SpaceBeforeRangeBasedForLoopColon: false
+SpaceInEmptyParentheses: false
+SpacesBeforeTrailingComments: 0
+SpacesInAngles: false
+SpacesInCStyleCastParentheses: false
+SpacesInContainerLiterals: false
+SpacesInParentheses: false
+SpacesInSquareBrackets: false
+TabWidth: 4
+UseTab: Never
diff --git a/SConstruct b/SConstruct
index 7d1732c..ced104c 100644
--- a/SConstruct
+++ b/SConstruct
@@ -1,10 +1,14 @@
 config = {
-    'PROJECT_NAME': 'spp_template'
+    'PROJECT_NAME': 'RAID Framework',
+    'CXX_NO_EXCEPTIONS': True
 }
 env = SConscript('external/scons-plus-plus/SConscript', exports = ['config'])
 env.Append(CPPPATH = [Dir('private'), Dir('public')])
 
-# app
-env = env.Module('private/spp_template/SModule')
+# library
+env = env.Module('private/raid/SModule')
+
+# test app
+env = env.Module('private/raid_test/SModule')
 
 env.Finalize()
diff --git a/external/scons-plus-plus b/external/scons-plus-plus
index c883f3c..c994752 160000
--- a/external/scons-plus-plus
+++ b/external/scons-plus-plus
@@ -1 +1 @@
-Subproject commit c883f3c1c777357957e30fc44cf987e8bb62c818
+Subproject commit c994752c3244fdf9835b1d3a5238094d2a799855
diff --git a/private/raid/SModule b/private/raid/SModule
new file mode 100644
index 0000000..31e1a2b
--- /dev/null
+++ b/private/raid/SModule
@@ -0,0 +1,31 @@
+
+Import('env')
+
+src_files = Split("""
+    application.cpp
+""")
+
+lib_raid = env.UnityStaticLibrary(
+    name = 'RAID',
+    target = env['LIB_DIR'] + '/raid',
+    source = src_files,
+    dependencies = {
+        'fmt': {},
+        'mijin': {},
+        'imgui': {
+            'options': {
+                'docking': True,
+                'backends': [
+                    'sdl3',
+                    'opengl3'
+                ]
+            }
+        },
+        'SDL': {
+            'min': (3,0,0)
+        }
+    }
+)
+env.Default(lib_raid)
+
+Return('env')
diff --git a/private/raid/application.cpp b/private/raid/application.cpp
new file mode 100644
index 0000000..11f8a05
--- /dev/null
+++ b/private/raid/application.cpp
@@ -0,0 +1,240 @@
+
+#include "raid/raid.hpp"
+
+#include <chrono>
+#include <thread>
+#include <fmt/base.h>
+#include <SDL3/SDL.h>
+#include <mijin/debug/assert.hpp>
+#include <mijin/util/scope_guard.hpp>
+#include <imgui.h>
+#include <backends/imgui_impl_opengl3.h>
+#include <backends/imgui_impl_sdl3.h>
+
+namespace raid
+{
+namespace
+{
+constexpr int GL_COLOR_BUFFER_BIT = 0x00004000;
+const char* IMGUI_GLSL_VERSION = "#version 130";
+}
+
+int Application::run(int argc, char** argv)
+{
+    (void) argc;
+    (void) argv;
+
+    MIJIN_SCOPE_EXIT {
+        cleanup();
+    };
+    if (!initSDL())
+    {
+        return ERR_INIT_FAILED;
+    }
+    if (!initGL())
+    {
+        return ERR_INIT_FAILED;
+    }
+    if (!initImGui())
+    {
+        return ERR_INIT_FAILED;
+    }
+
+    while (mRunning)
+    {
+        handleSDLEvents();
+
+        if (SDL_GetWindowFlags(mWindow) & SDL_WINDOW_MINIMIZED)
+        {
+            std::this_thread::sleep_for(std::chrono::milliseconds(10));
+            continue;
+        }
+
+        ImGui_ImplOpenGL3_NewFrame();
+        ImGui_ImplSDL3_NewFrame();
+        ImGui::NewFrame();
+
+        ImGui::SetNextWindowPos({0, 0});
+        ImGui::SetNextWindowSize(ImGui::GetIO().DisplaySize);
+
+        ImGui::Begin("##main", nullptr, ImGuiWindowFlags_NoBackground | ImGuiWindowFlags_NoDecoration);
+        render();
+        ImGui::End();
+
+        ImGui::Render();
+
+        glClearColor(0.3f, 0.3f, 0.3f, 1.f);
+        glClear(GL_COLOR_BUFFER_BIT);
+        ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());
+
+        SDL_GL_SwapWindow(mWindow);
+    }
+
+    return 0;
+}
+
+void Application::handleMessage(const Message& message)
+{
+    switch (message.severity)
+    {
+        case MessageSeverity::INFO:
+            fmt::print("INFO: {}", message.text);
+            break;
+        case MessageSeverity::WARNING:
+            fmt::print("WARNING: {}", message.text);
+            break;
+        case MessageSeverity::ERROR:
+            fmt::print(stderr, "ERROR: {}", message.text);
+            break;
+    }
+}
+
+void Application::handleSDLEvent(const SDL_Event& event)
+{
+    switch (event.type)
+    {
+        case SDL_EVENT_QUIT:
+            mRunning = false;
+            return;
+        default:
+            ImGui_ImplSDL3_ProcessEvent(&event);
+            break;
+    }
+}
+
+bool Application::initSDL()
+{
+    if (!SDL_Init(0))
+    {
+        msgError("Error initializing SDL: {}.", SDL_GetError());
+        return false;
+    }
+
+    // GL attributes must be set before window creation
+    SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 3);
+    SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 1);
+    SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_CORE);
+    SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
+
+    // TODO: not sure if these really make sense, but they are in the example
+    SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 24);
+    SDL_GL_SetAttribute(SDL_GL_STENCIL_SIZE, 8);
+
+    const SDL_WindowFlags WINDOW_FLAGS = 0
+            | SDL_WINDOW_OPENGL
+            | SDL_WINDOW_RESIZABLE
+            | SDL_WINDOW_HIGH_PIXEL_DENSITY;
+    mWindow = SDL_CreateWindow(
+        /* title = */ "RAID",
+        /* w     = */ 1280,
+        /* h     = */ 720,
+        /* flags = */ WINDOW_FLAGS
+    );
+    return true;
+}
+
+bool Application::initGL()
+{
+    mGLContext = SDL_GL_CreateContext(mWindow);
+    if (mWindow == nullptr)
+    {
+        msgError("Error creating SDL window: {}.", SDL_GetError());
+        return false;
+    }
+    SDL_GL_MakeCurrent(mWindow, mGLContext);
+    SDL_GL_SetSwapInterval(1); // enable vsync, at least for now
+
+    glClear = reinterpret_cast<glClear_fn_t>(SDL_GL_GetProcAddress("glClear"));
+    glClearColor = reinterpret_cast<glClearColor_fn_t>(SDL_GL_GetProcAddress("glClearColor"));
+
+    return true;
+}
+
+bool Application::initImGui()
+{
+    IMGUI_CHECKVERSION(); // not exactly useful when using static libs, but won't hurt
+
+    if (ImGui::CreateContext() == nullptr)
+    {
+        msgError("Error initializing ImGui context.");
+        return false;
+    }
+
+    ImGuiIO& imguiIO = ImGui::GetIO();
+    imguiIO.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard;
+    imguiIO.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad;
+
+    // default style
+    ImGui::StyleColorsDark();
+
+    // init the backends
+    if (!ImGui_ImplSDL3_InitForOpenGL(mWindow, mGLContext))
+    {
+        msgError("Error initializing ImGui SDL3 backend.");
+        return false;
+    }
+    if (!ImGui_ImplOpenGL3_Init(IMGUI_GLSL_VERSION))
+    {
+        msgError("Error initializing ImGui OpenGL3 backend.");
+        return false;
+    }
+
+    // init font
+    imguiIO.Fonts->AddFontDefault();
+
+    return true;
+}
+
+void Application::cleanup()
+{
+    if (ImGui::GetCurrentContext() != nullptr)
+    {
+        const ImGuiIO& imguiIO = ImGui::GetIO();
+        if (imguiIO.BackendRendererUserData != nullptr)
+        {
+            ImGui_ImplOpenGL3_Shutdown();
+        }
+        if (imguiIO.BackendPlatformUserData != nullptr)
+        {
+            ImGui_ImplSDL3_Shutdown();
+        }
+        ImGui::DestroyContext();
+    }
+    if (mGLContext != nullptr)
+    {
+        SDL_GL_DestroyContext(mGLContext);
+    }
+    if (mWindow != nullptr)
+    {
+        SDL_DestroyWindow(mWindow);
+    }
+    SDL_Quit();
+}
+
+void Application::handleSDLEvents()
+{
+    SDL_Event event;
+    while (SDL_PollEvent(&event))
+    {
+        handleSDLEvent(event);
+    }
+}
+
+void QuickApp::init(QuickAppOptions options)
+{
+    MIJIN_ASSERT_FATAL(options.callbacks.render, "Missing render callback.");
+    mOptions = std::move(options);
+}
+
+void QuickApp::render()
+{
+    mOptions.callbacks.render();
+}
+
+int runQuick(int argc, char* argv[], QuickAppOptions options)
+{
+    QuickApp app;
+    app.init(std::move(options));
+    return app.run(argc, argv);
+}
+}
diff --git a/private/spp_template/SModule b/private/raid_test/SModule
similarity index 62%
rename from private/spp_template/SModule
rename to private/raid_test/SModule
index 18935e7..8e55386 100644
--- a/private/spp_template/SModule
+++ b/private/raid_test/SModule
@@ -6,11 +6,12 @@ src_files = Split("""
 """)
 
 prog_app = env.UnityProgram(
-    name = 'Template',
-    target = env['BIN_DIR'] + '/spp_template',
+    name = 'Test App',
+    target = env['BIN_DIR'] + '/raid_test',
     source = src_files,
     dependencies = {
-        'mijin': {}
+        'mijin': {},
+        'RAID': {}
     }
 )
 env.Default(prog_app)
diff --git a/private/raid_test/main.cpp b/private/raid_test/main.cpp
new file mode 100644
index 0000000..a24bac5
--- /dev/null
+++ b/private/raid_test/main.cpp
@@ -0,0 +1,21 @@
+
+#include "raid/raid.hpp"
+
+#include <imgui.h>
+
+namespace
+{
+void render()
+{
+    ImGui::Text("hi");
+}
+}
+
+int main(int argc, char* argv[])
+{
+    return raid::runQuick(argc, argv, {
+        .callbacks = {
+            .render = &render
+        }
+    });
+}
diff --git a/private/spp_template/main.cpp b/private/spp_template/main.cpp
deleted file mode 100644
index e9ad257..0000000
--- a/private/spp_template/main.cpp
+++ /dev/null
@@ -1,5 +0,0 @@
-
-int main(int, char**)
-{
-  return 0;
-}
diff --git a/public/raid/raid.hpp b/public/raid/raid.hpp
new file mode 100644
index 0000000..a937fda
--- /dev/null
+++ b/public/raid/raid.hpp
@@ -0,0 +1,133 @@
+
+#pragma once
+
+#if !defined(RAID_PUBLIC_RAID_RAID_HPP_INCLUDED)
+#define RAID_PUBLIC_RAID_RAID_HPP_INCLUDED 1
+
+#include <cstdint>
+#include <functional>
+#include <fmt/format.h>
+#include <SDL3/SDL.h>
+
+namespace raid
+{
+inline constexpr int ERR_INIT_FAILED = 100;
+
+enum class MessageSeverity : unsigned char
+{
+    INFO,
+    WARNING,
+    ERROR
+};
+
+struct Message
+{
+    MessageSeverity severity;
+    const char* text;
+};
+
+class Application
+{
+private:
+    bool mRunning = true;
+    SDL_Window* mWindow = nullptr;
+    SDL_GLContext mGLContext = nullptr;
+
+    using glClear_fn_t = void (*)(std::uint32_t);
+    using glClearColor_fn_t = void (*)(float, float, float, float);
+
+    glClear_fn_t glClear;
+    glClearColor_fn_t glClearColor;
+public:
+    virtual ~Application() = default;
+
+    [[nodiscard]]
+    int run(int argc, char* argv[]);
+
+protected:
+    virtual void render() = 0;
+    virtual void handleMessage(const Message& message);
+    virtual void handleSDLEvent(const SDL_Event& event);
+
+    void msgInfo(const char* text)
+    {
+        handleMessage({
+            .severity = MessageSeverity::INFO,
+            .text = text
+        });
+    }
+    void msgWarning(const char* text)
+    {
+        handleMessage({
+            .severity = MessageSeverity::WARNING,
+            .text = text
+        });
+    }
+    void msgError(const char* text)
+    {
+        handleMessage({
+            .severity = MessageSeverity::ERROR,
+            .text = text
+        });
+    }
+    void msgInfo(const std::string& text)
+    {
+        msgInfo(text.c_str());
+    }
+    void msgWarning(const std::string& text)
+    {
+        msgWarning(text.c_str());
+    }
+    void msgError(const std::string& text)
+    {
+        msgError(text.c_str());
+    }
+    template<typename TArg, typename... TArgs>
+    void msgInfo(fmt::format_string<TArg, TArgs...> format, TArg&& arg, TArgs&&... args)
+    {
+        std::string text = fmt::format(format, std::forward<TArg>(arg), std::forward<TArgs>(args)...);
+        msgInfo(text);
+    }
+    template<typename TArg, typename... TArgs>
+    void msgWarning(fmt::format_string<TArg, TArgs...> format, TArg&& arg, TArgs&&... args)
+    {
+        std::string text = fmt::format(format, std::forward<TArg>(arg), std::forward<TArgs>(args)...);
+        msgWarning(text);
+    }
+    template<typename TArg, typename... TArgs>
+    void msgError(fmt::format_string<TArg, TArgs...> format, TArg&& arg, TArgs&&... args)
+    {
+        std::string text = fmt::format(format, std::forward<TArg>(arg), std::forward<TArgs>(args)...);
+        msgError(text);
+    }
+private:
+    bool initSDL();
+    bool initGL();
+    bool initImGui();
+    void cleanup();
+    void handleSDLEvents();
+};
+
+using render_cb_t = std::function<void()>;
+struct QuickAppOptions
+{
+    struct
+    {
+        render_cb_t render;
+    } callbacks;
+};
+
+class QuickApp : public Application
+{
+private:
+    QuickAppOptions mOptions;
+public:
+    void init(QuickAppOptions options);
+    void render() override;
+};
+
+[[nodiscard]]
+int runQuick(int argc, char* argv[], QuickAppOptions options);
+} // namespace raid
+
+#endif // !defined(RAID_PUBLIC_RAID_RAID_HPP_INCLUDED)