diff --git a/.devcontainer b/.devcontainer
new file mode 160000
index 000000000..838863d32
--- /dev/null
+++ b/.devcontainer
@@ -0,0 +1 @@
+Subproject commit 838863d323367b3931ee5af5d82aaa3bbd4f3d3b
diff --git a/.github/workflows/xpbuild.yml b/.github/workflows/xpbuild.yml
new file mode 100644
index 000000000..fb5575822
--- /dev/null
+++ b/.github/workflows/xpbuild.yml
@@ -0,0 +1,30 @@
+name: Build
+on:
+  push:
+    branches: [ "dev" ]
+  pull_request:
+    branches: [ "dev" ]
+  workflow_dispatch:
+jobs:
+  linux:
+    uses: externpro/externpro/.github/workflows/build-linux.yml@25.05.1
+    with:
+      cmake-workflow-preset: LinuxRelease
+      runon: ubuntu-latest
+    secrets: inherit
+  linux-arm64:
+    uses: externpro/externpro/.github/workflows/build-linux.yml@25.05.1
+    with:
+      cmake-workflow-preset: LinuxRelease
+      runon: ubuntu-24.04-arm
+    secrets: inherit
+  macos:
+    uses: externpro/externpro/.github/workflows/build-macos.yml@25.05.1
+    with:
+      cmake-workflow-preset: DarwinRelease
+    secrets: inherit
+  windows:
+    uses: externpro/externpro/.github/workflows/build-windows.yml@25.05.1
+    with:
+      cmake-workflow-preset: WindowsRelease
+    secrets: inherit
diff --git a/.github/workflows/xprelease.yml b/.github/workflows/xprelease.yml
new file mode 100644
index 000000000..f868a82e5
--- /dev/null
+++ b/.github/workflows/xprelease.yml
@@ -0,0 +1,20 @@
+name: Release
+on:
+  workflow_dispatch:
+    inputs:
+      workflow_run_url:
+        description: 'URL of the workflow run containing artifacts to upload (e.g., https://github.com/owner/repo/actions/runs/123456789)'
+        required: true
+        type: string
+jobs:
+  # Upload build artifacts as release assets
+  release-from-build:
+    uses: externpro/externpro/.github/workflows/release-from-build.yml@25.05.1
+    with:
+      workflow_run_url: ${{ github.event.inputs.workflow_run_url }}
+      artifact_pattern: "*.tar.xz"
+    permissions:
+      contents: write
+      id-token: write
+      attestations: write
+    secrets: inherit
diff --git a/.gitignore b/.gitignore
index f6ab76fda..692337eed 100644
--- a/.gitignore
+++ b/.gitignore
@@ -12,7 +12,6 @@ core
 core.*
 *.bak
 *~
-*build*
 *.moc.*
 *.moc
 ui_*
@@ -36,3 +35,8 @@ lapack/reference
 .settings
 Makefile
 !ci/build.gitlab-ci.yml
+
+# externpro
+.env
+_bld*/
+docker-compose.override.yml
diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 000000000..18932abfb
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule ".devcontainer"]
+	path = .devcontainer
+	url = https://github.com/externpro/externpro
diff --git a/CMakeLists.txt b/CMakeLists.txt
index f3e69b845..08a2d11f2 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,6 +1,7 @@
 # cmake_minimum_require must be the first command of the file
-cmake_minimum_required(VERSION 3.5.0)
+cmake_minimum_required(VERSION 3.5.0...3.31)
 
+set(CMAKE_PROJECT_TOP_LEVEL_INCLUDES .devcontainer/cmake/xproinc.cmake)
 project(Eigen3)
 
 # guard against in-source builds
@@ -58,8 +59,9 @@ endif()
 include(CheckCXXCompilerFlag)
 include(GNUInstallDirs)
 include(CMakeDependentOption)
+include(xpflags)
 
-set(CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR}/cmake)
+list(APPEND CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR}/cmake)
 
 
 option(EIGEN_TEST_CXX11 "Enable testing with C++11 and C++11 features (e.g. Tensor module)." OFF)
@@ -420,6 +422,24 @@ set(EIGEN_CUDA_COMPUTE_ARCH 30 CACHE STRING "The CUDA compute architecture level
 
 include_directories(${CMAKE_CURRENT_SOURCE_DIR})
 
+function(callPackageDevel)
+  set(XP_INSTALL_CMAKEDIR ${CMAKEPACKAGE_INSTALL_DIR})
+  set(CMAKE_PROJECT_NAME eigen)
+  xpPackageDevel(TARGETS_FILE ${targetsFile} LIBRARIES ${INSTALL_NAMESPACE}Eigen)
+endfunction()
+
+set(targetsFile Eigen3Targets)
+if(DEFINED XP_NAMESPACE)
+  set(CMAKEPACKAGE_INSTALL_DIR "${CMAKE_INSTALL_DATADIR}/cmake")
+  set(INSTALL_COMPONENT "devel")
+  set(INSTALL_NAMESPACE "${XP_NAMESPACE}::")
+  callPackageDevel()
+  set(CMAKE_INSTALL_DEFAULT_COMPONENT_NAME devel)
+else()
+  set(INSTALL_COMPONENT "Devel")
+  set(INSTALL_NAMESPACE "Eigen3::")
+endif()
+
 # Backward compatibility support for EIGEN_INCLUDE_INSTALL_DIR
 if(EIGEN_INCLUDE_INSTALL_DIR)
   message(WARNING "EIGEN_INCLUDE_INSTALL_DIR is deprecated. Use INCLUDE_INSTALL_DIR instead.")
@@ -463,7 +483,7 @@ endmacro()
 
 install(FILES
   signature_of_eigen3_matrix_library
-  DESTINATION ${INCLUDE_INSTALL_DIR} COMPONENT Devel
+  DESTINATION ${INCLUDE_INSTALL_DIR} COMPONENT ${INSTALL_COMPONENT}
   )
 
 if(EIGEN_BUILD_PKGCONFIG)
@@ -473,7 +493,7 @@ if(EIGEN_BUILD_PKGCONFIG)
         )
 endif()
 
-install(DIRECTORY Eigen DESTINATION ${INCLUDE_INSTALL_DIR} COMPONENT Devel)
+install(DIRECTORY Eigen DESTINATION ${INCLUDE_INSTALL_DIR} COMPONENT ${INSTALL_COMPONENT})
 
 
 option(EIGEN_BUILD_DOC "Enable creation of Eigen documentation" ON)
@@ -605,12 +625,13 @@ target_compile_definitions (eigen INTERFACE ${EIGEN_DEFINITIONS})
 target_include_directories (eigen INTERFACE
   $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>
   $<INSTALL_INTERFACE:${INCLUDE_INSTALL_DIR}>
+  $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
 )
 
 # Export as title case Eigen
 set_target_properties (eigen PROPERTIES EXPORT_NAME Eigen)
 
-install (TARGETS eigen EXPORT Eigen3Targets)
+install (TARGETS eigen EXPORT ${targetsFile})
 
 configure_package_config_file (
   ${CMAKE_CURRENT_SOURCE_DIR}/cmake/Eigen3Config.cmake.in
@@ -632,12 +653,12 @@ set (CMAKE_SIZEOF_VOID_P ${_Eigen3_CMAKE_SIZEOF_VOID_P})
 
 # The Eigen target will be located in the Eigen3 namespace. Other CMake
 # targets can refer to it using Eigen3::Eigen.
-export (TARGETS eigen NAMESPACE Eigen3:: FILE Eigen3Targets.cmake)
+export (TARGETS eigen NAMESPACE ${INSTALL_NAMESPACE} FILE ${targetsFile}.cmake)
 # Export Eigen3 package to CMake registry such that it can be easily found by
 # CMake even if it has not been installed to a standard directory.
 export (PACKAGE Eigen3)
 
-install (EXPORT Eigen3Targets NAMESPACE Eigen3:: DESTINATION ${CMAKEPACKAGE_INSTALL_DIR})
+install (EXPORT ${targetsFile} NAMESPACE ${INSTALL_NAMESPACE} DESTINATION ${CMAKEPACKAGE_INSTALL_DIR})
 
 install ( FILES ${CMAKE_CURRENT_SOURCE_DIR}/cmake/UseEigen3.cmake
                 ${CMAKE_CURRENT_BINARY_DIR}/Eigen3Config.cmake
diff --git a/CMakePresets.json b/CMakePresets.json
new file mode 100644
index 000000000..f82cfdd2c
--- /dev/null
+++ b/CMakePresets.json
@@ -0,0 +1,8 @@
+{
+  "version": 8,
+  "include": [
+    ".devcontainer/cmake/presets/xpLinuxNinja.json",
+    ".devcontainer/cmake/presets/xpDarwinNinja.json",
+    ".devcontainer/cmake/presets/xpWindowsVs2022.json"
+  ]
+}
diff --git a/CMakePresetsBase.json b/CMakePresetsBase.json
new file mode 100644
index 000000000..f8c228240
--- /dev/null
+++ b/CMakePresetsBase.json
@@ -0,0 +1,15 @@
+{
+  "version": 8,
+  "configurePresets": [
+    {
+      "name": "config-base",
+      "hidden": true,
+      "binaryDir": "${sourceDir}/_bld-${presetName}",
+      "cacheVariables": {
+        "BUILD_TESTING": "OFF",
+        "EIGEN_BUILD_PKGCONFIG": "OFF",
+        "XP_NAMESPACE": "xpro"
+      }
+    }
+  ]
+}
diff --git a/docker-compose.sh b/docker-compose.sh
new file mode 120000
index 000000000..85f182f0b
--- /dev/null
+++ b/docker-compose.sh
@@ -0,0 +1 @@
+.devcontainer/compose.pro.sh
\ No newline at end of file
diff --git a/docker-compose.yml b/docker-compose.yml
new file mode 120000
index 000000000..46c1f8918
--- /dev/null
+++ b/docker-compose.yml
@@ -0,0 +1 @@
+.devcontainer/compose.bld.yml
\ No newline at end of file