diff --git a/.github/workflows/gen-pr.yml b/.github/workflows/gen-pr.yml
index 468d738..b360432 100644
--- a/.github/workflows/gen-pr.yml
+++ b/.github/workflows/gen-pr.yml
@@ -25,9 +25,40 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
 
+      - name: Set reusable strings
+        # Turn repeated input strings (such as the build output directory) into step outputs. These step outputs can be used throughout the workflow file.
+        id: strings
+        shell: bash
+        run: |
+          echo "build-output-dir=$GITHUB_WORKSPACE/build" >> "$GITHUB_OUTPUT"
+          echo "install-dir=$GITHUB_WORKSPACE/install/ubuntu-latest-clang-Debug" >> "$GITHUB_OUTPUT"
+
+      - name: Install SDL windowing deps (Linux)
+        run: |
+          sudo apt update
+          sudo apt install -y \
+              build-essential cmake ninja-build pkg-config gcc clang git python3 \
+              libasound2-dev libjack-jackd2-dev libpulse-dev \
+              xorg-dev libx11-dev libxext-dev libxrandr-dev libxcursor-dev libxfixes-dev libxi-dev libxss-dev libxtst-dev \
+              libxkbcommon-dev wayland-protocols libwayland-dev \
+              libdrm-dev mesa-utils mesa-common-dev
+
+      - name: Configure CMake
+        # Configure CMake in a 'build' subdirectory. `CMAKE_BUILD_TYPE` is only required if you are using a single-configuration generator such as make.
+        # See https://cmake.org/cmake/help/latest/variable/CMAKE_BUILD_TYPE.html?highlight=cmake_build_type
+        run: >
+          cmake -B ${{ steps.strings.outputs.build-output-dir }}
+          -DCMAKE_CXX_COMPILER=clang++
+          -DCMAKE_C_COMPILER=clang
+          -S $GITHUB_WORKSPACE
+          -G "Ninja Multi-Config"
+
+      - name: Build
+        run: cmake --build ${{ steps.strings.outputs.build-output-dir }} --config Debug
+
       - name: Generate PR from issue using OpenRouter
         uses: WillBooster/gen-pr@v4.1.4
         with:
           issue-number: ${{ inputs.issue-number }}
-          aider-extra-args: "--model openrouter/openrouter/polaris-alpha"
+          aider-extra-args: "--model openrouter/kwaipilot/kat-coder-pro:free"
           verbose: true
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..42afabf
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+/build
\ No newline at end of file
diff --git a/gen-pr.config.yml b/gen-pr.config.yml
index 7e0b7dc..185635f 100644
--- a/gen-pr.config.yml
+++ b/gen-pr.config.yml
@@ -1,12 +1,12 @@
 # gen-pr.config.yml
-planning-model: openrouter/openrouter/polaris-alpha
+planning-model: openrouter/kwaipilot/kat-coder-pro:free
 reasoning-effort: high
 
-repomix-extra-args: "--compress --remove-empty-lines --include '**/*.cpp' --include '**/*.ixx'"
+repomix-extra-args: "--compress --remove-empty-lines --include '**/*.cpp' --include '**/*.ixx' --include '**/CMakeLists.txt'"
 
 coding-tool: aider
-aider-extra-args: "--model openrouter/openrouter/polaris-alpha"
+aider-extra-args: "--model openrouter/kwaipilot/kat-coder-pro:free"
 verbose: true
 
 # Run build tests after code generation
-test-command: "cmake -S . -B build"
+test-command: "cmake --build ./build --config Debug"
diff --git a/sdl_wrapper/sdl_wrapper.buffer.ixx b/sdl_wrapper/sdl_wrapper.buffer.ixx
index a813db7..163d9d6 100644
--- a/sdl_wrapper/sdl_wrapper.buffer.ixx
+++ b/sdl_wrapper/sdl_wrapper.buffer.ixx
@@ -16,7 +16,7 @@ export namespace sopho
         SDL_GPUTransferBuffer* m_transfer_buffer{};
         uint32_t m_transfer_buffer_size{};
 
-        BufferWrapper(std::shared_ptr<GpuWrapper> p_gpu, SDL_GPUBuffer* p_buffer) :
+        BufferWrapper(std::shared_ptr<::sopho::GpuWrapper> p_gpu, SDL_GPUBuffer* p_buffer) :
             m_gpu(p_gpu), m_vertex_buffer(p_buffer)
         {
         }
diff --git a/sdl_wrapper/sdl_wrapper.gpu.cpp b/sdl_wrapper/sdl_wrapper.gpu.cpp
index 73eab63..b759408 100644
--- a/sdl_wrapper/sdl_wrapper.gpu.cpp
+++ b/sdl_wrapper/sdl_wrapper.gpu.cpp
@@ -2,10 +2,18 @@
 // Created by wsqsy on 11/14/2025.
 //
 module;
+#include <SDL3/SDL_gpu.h>
 module sdl_wrapper;
 import :gpu;
 import :pipeline;
 namespace sopho
 {
+    BufferWrapper GpuWrapper::create_buffer(SDL_GPUBufferUsageFlags flag, uint32_t size)
+    {
+        SDL_GPUBufferCreateInfo create_info{flag, size};
+        auto buffer = SDL_CreateGPUBuffer(m_device, &create_info);
+        BufferWrapper result(shared_from_this(), buffer);
+        return result;
+    }
     PipelineWrapper GpuWrapper::create_pipeline() { return PipelineWrapper{shared_from_this()}; }
-}
+} // namespace sopho
diff --git a/sdl_wrapper/sdl_wrapper.gpu.ixx b/sdl_wrapper/sdl_wrapper.gpu.ixx
index 45e7186..352ce9d 100644
--- a/sdl_wrapper/sdl_wrapper.gpu.ixx
+++ b/sdl_wrapper/sdl_wrapper.gpu.ixx
@@ -9,9 +9,9 @@ module;
 export module sdl_wrapper:gpu;
 import :buffer;
 import :pipeline;
-namespace sopho
+export namespace sopho
 {
-    export class GpuWrapper : public std::enable_shared_from_this<GpuWrapper>
+    class GpuWrapper : public std::enable_shared_from_this<GpuWrapper>
     {
         SDL_GPUDevice* m_device{};
 
@@ -37,13 +37,7 @@ namespace sopho
 
         auto data() { return m_device; }
 
-        auto create_buffer(SDL_GPUBufferUsageFlags flag, uint32_t size)
-        {
-            SDL_GPUBufferCreateInfo create_info{flag, size};
-            auto buffer = SDL_CreateGPUBuffer(m_device, &create_info);
-            BufferWrapper result(shared_from_this(), buffer);
-            return result;
-        }
+        BufferWrapper create_buffer(SDL_GPUBufferUsageFlags flag, uint32_t size);
 
         PipelineWrapper create_pipeline();