diff --git a/.github/workflows/build_orca.yml b/.github/workflows/build_orca.yml
index 7ccb52b0e6..22e435327f 100644
--- a/.github/workflows/build_orca.yml
+++ b/.github/workflows/build_orca.yml
@@ -50,6 +50,20 @@ jobs:
           useLocalCache: true         # <--= Use the local cache (default is 'false').
           useCloudCache: true
 
+      - name: Install codegen tools and generate config sources
+        run: |
+          pip install grpcio-tools
+          python tools/run_codegen.py
+        if: runner.os == 'Windows'
+        shell: pwsh
+
+      - name: Install codegen tools and generate config sources
+        run: |
+          pip3 install grpcio-tools
+          python3 tools/run_codegen.py
+        if: runner.os != 'Windows'
+        shell: bash
+
       - name: Get the version and date on Ubuntu and macOS
         if: runner.os != 'Windows'
         run: |
diff --git a/CMakeLists.txt b/CMakeLists.txt
index c7fa3f12cf..b6d17a44fd 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -872,6 +872,11 @@ function(orcaslicer_copy_dlls target config postfix output_dlls)
 endfunction()
 
 
+# Config codegen — generates src/slic3r/GUI/generated/*.cpp from src/PrintConfigs/*.proto.
+# Must run before compiling libslic3r (PrintConfig.cpp #includes the generated files).
+# Requires: pip install grpcio-tools  OR  standalone protoc in PATH.
+include(cmake/modules/ConfigCodegen.cmake)
+
 # libslic3r, OrcaSlicer GUI and the OrcaSlicer executable.
 add_subdirectory(deps_src)
 add_subdirectory(src)
diff --git a/build_linux.sh b/build_linux.sh
index 98201958f4..baf87f4ca2 100755
--- a/build_linux.sh
+++ b/build_linux.sh
@@ -545,6 +545,10 @@ if [[ -n "${BUILD_ORCA}" ]] || [[ -n "${BUILD_TESTS}" ]] ; then
         BUILD_ARGS+=(-DORCA_UPDATER_SIG_KEY="${ORCA_UPDATER_SIG_KEY}")
     fi
 
+    echo "Generating config sources from proto..."
+    pip install grpcio-tools -q
+    python3 tools/run_codegen.py || { echo "ERROR: config codegen failed"; exit 1; }
+
     print_and_run cmake -S . -B $BUILD_DIR "${CMAKE_C_CXX_COMPILER_CLANG[@]}" "${CMAKE_LLD_LINKER_ARGS[@]}" "${CMAKE_CCACHE_ARGS[@]}" -G "Ninja Multi-Config" \
 -DSLIC3R_PCH=${SLIC3R_PRECOMPILED_HEADERS} \
 -DORCA_TOOLS=ON \
diff --git a/build_release_macos.sh b/build_release_macos.sh
index 8d417695ad..a7398820fc 100755
--- a/build_release_macos.sh
+++ b/build_release_macos.sh
@@ -180,6 +180,10 @@ function pack_deps() {
 }
 
 function build_slicer() {
+    echo "Generating config sources from proto..."
+    pip3 install grpcio-tools -q
+    python3 tools/run_codegen.py || { echo "ERROR: config codegen failed"; exit 1; }
+
     # iterate over two architectures: x86_64 and arm64
     for _ARCH in x86_64 arm64; do
         # if ARCH is universal or equal to _ARCH
diff --git a/build_release_vs.bat b/build_release_vs.bat
index 3f1a2e0af4..daf7cbee95 100644
--- a/build_release_vs.bat
+++ b/build_release_vs.bat
@@ -126,6 +126,15 @@ if "%1"=="deps" goto :done
 :slicer
 echo "building Orca Slicer..."
 cd %WP%
+
+echo "generating config sources from proto..."
+pip install grpcio-tools -q
+python tools/run_codegen.py
+if errorlevel 1 (
+    echo "ERROR: config codegen failed"
+    exit /b 1
+)
+
 mkdir %build_dir%
 cd %build_dir%
 
diff --git a/build_release_vs2022.bat b/build_release_vs2022.bat
index 4a5ae11277..f118b3c121 100644
--- a/build_release_vs2022.bat
+++ b/build_release_vs2022.bat
@@ -57,6 +57,15 @@ if "%1"=="deps" exit /b 0
 :slicer
 echo "building Orca Slicer..."
 cd %WP%
+
+echo "generating config sources from proto..."
+pip install grpcio-tools -q
+python tools/run_codegen.py
+if errorlevel 1 (
+    echo "ERROR: config codegen failed"
+    exit /b 1
+)
+
 mkdir %build_dir%
 cd %build_dir%
 
diff --git a/src/libslic3r/CMakeLists.txt b/src/libslic3r/CMakeLists.txt
index 9b67d7ab50..2aef898101 100644
--- a/src/libslic3r/CMakeLists.txt
+++ b/src/libslic3r/CMakeLists.txt
@@ -489,6 +489,21 @@ add_library(libslic3r STATIC ${lisbslic3r_sources}
     ${OpenVDBUtils_SOURCES})
 source_group(TREE ${CMAKE_CURRENT_SOURCE_DIR} FILES ${lisbslic3r_sources})
 
+# Ensure codegen runs before compiling libslic3r (PrintConfig.cpp, Preset.cpp, Print.cpp
+# all #include generated files — MSVC tracks the #include deps automatically after first build,
+# but this dependency ensures the generated files exist and are up-to-date before compilation).
+if(TARGET codegen_config)
+    add_dependencies(libslic3r codegen_config)
+    # Tell cmake that the three source files that #include generated code depend on them,
+    # so an incremental build recompiles them when protos change.
+    set_source_files_properties(
+        "${CMAKE_CURRENT_SOURCE_DIR}/PrintConfig.cpp"
+        "${CMAKE_CURRENT_SOURCE_DIR}/Preset.cpp"
+        "${CMAKE_CURRENT_SOURCE_DIR}/Print.cpp"
+        PROPERTIES OBJECT_DEPENDS "${CONFIG_GENERATED_SOURCES}"
+    )
+endif()
+
 if (SLIC3R_STATIC)
     set(CGAL_Boost_USE_STATIC_LIBS ON CACHE BOOL "" FORCE)
 endif ()
diff --git a/src/slic3r/CMakeLists.txt b/src/slic3r/CMakeLists.txt
index c4d6369b72..13bd15031c 100644
--- a/src/slic3r/CMakeLists.txt
+++ b/src/slic3r/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.13)
+cmake_minimum_required(VERSION 3.13)
 project(libslic3r_gui)
 
 include(PrecompiledHeader)
@@ -460,6 +460,7 @@ set(SLIC3R_GUI_SOURCES
     GUI/TabButton.hpp
     GUI/Tab.cpp
     GUI/Tab.hpp
+    GUI/TabLayoutExtra.cpp
     GUI/TaskManager.cpp
     GUI/TaskManager.hpp
     GUI/TextLines.cpp