diff --git a/.github/workflows/pull_request.yaml b/.github/workflows/pull_request.yaml
index e81d732..795b641 100644
--- a/.github/workflows/pull_request.yaml
+++ b/.github/workflows/pull_request.yaml
@@ -33,3 +33,81 @@ jobs:
     uses: NWChemEx/.github/.github/workflows/test_nwx_library.yaml@master
     with:
       compilers: '["gcc-14", "clang-18"]'
+
+  test_python:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Install clang-18
+        run: |
+          sudo apt-get update -y
+          sudo apt-get install -y clang-18
+          echo "CC=clang-18" >> $GITHUB_ENV
+          echo "CXX=clang++-18" >> $GITHUB_ENV
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.12"
+
+      - name: Editable install (dev)
+        run: pip install -e ".[dev]"
+
+      - name: Run C++ tests
+        run: cd build && ctest --output-on-failure
+
+      - name: Run Python tests
+        run: pytest tests/python/
+
+  deploy_to_testpypi:
+    needs: test_python
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - os: ubuntu-latest
+            cibw_build: cp312-manylinux_x86_64
+          - os: macos-14
+            cibw_build: cp312-macosx_arm64
+    runs-on: ${{ matrix.os }}
+    permissions:
+      id-token: write
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Set pretend version for TestPyPI (unique per workflow run)
+        run: |
+          python3 -m pip install --upgrade pip
+          python3 -m pip install "setuptools-scm>=8"
+          python3 <<'PY'
+          import os
+
+          from setuptools_scm import get_version
+
+          gh_env = os.environ.get("GITHUB_ENV")
+          if not gh_env:
+              raise SystemExit("GITHUB_ENV is not set")
+
+          base = get_version(local_scheme="no-local-version")
+          rid = os.environ["GITHUB_RUN_ID"]
+          pretend = f"{base}.post{rid}"
+          with open(gh_env, "a", encoding="utf-8") as f:
+              f.write(f"SETUPTOOLS_SCM_PRETEND_VERSION={pretend}\n")
+          print(f"SETUPTOOLS_SCM_PRETEND_VERSION={pretend}")
+          PY
+
+      - name: Build wheels
+        uses: pypa/cibuildwheel@v2.22.0
+        env:
+          CIBW_BUILD: ${{ matrix.cibw_build }}
+
+      - name: Publish to TestPyPI
+        uses: pypa/gh-action-pypi-publish@release/v1
+        with:
+          packages-dir: wheelhouse/
+          repository-url: https://test.pypi.org/legacy/
diff --git a/.gitignore b/.gitignore
index ada45bd..a4d3afe 100644
--- a/.gitignore
+++ b/.gitignore
@@ -13,3 +13,8 @@
 # limitations under the License.
 
 venv/
+.cache/
+.venv/
+build/
+__pycache__/
+.pytest_cache/
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 80737ee..1ad90f3 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -13,47 +13,50 @@
 # limitations under the License.
 
 cmake_minimum_required(VERSION 3.14)
+
+# Version from scikit-build-core when building wheels/sdists; plain CMake keeps 1.0.0.
+# project(VERSION) accepts only numeric major.minor.patch[.tweak]; strip any PEP440 suffix.
+if(DEFINED SKBUILD_PROJECT_VERSION AND NOT SKBUILD_PROJECT_VERSION STREQUAL "")
+    set(_wtf_version_source "${SKBUILD_PROJECT_VERSION}")
+else()
+    set(_wtf_version_source "1.0.0")
+endif()
+if(_wtf_version_source MATCHES "^([0-9]+)\\.([0-9]+)\\.([0-9]+)")
+    set(_wtf_cmake_version "${CMAKE_MATCH_1}.${CMAKE_MATCH_2}.${CMAKE_MATCH_3}")
+else()
+    set(_wtf_cmake_version "1.0.0")
+endif()
+
 # Downloads common CMake modules used throughout NWChemEx
+project(wtf VERSION "${_wtf_cmake_version}" LANGUAGES CXX)
+
 include(cmake/get_nwx_cmake.cmake)
 
-project(wtf VERSION "1.0.0" LANGUAGES CXX)
-include(cmake/disable_in_source_builds.cmake)
+include(disable_in_source_builds)
 set(CMAKE_CXX_STANDARD 20)
+set(CMAKE_CXX_SCAN_FOR_MODULES OFF)
 
 # TODO: Make these into proper options
 set(BUILD_TESTING TRUE)
 set(CMAKE_BUILD_SHARED_LIBS ON)
-
-include(cmake/get_dependencies.cmake)
+option(BUILD_PYBIND11_BINDINGS "Build Python bindings via pybind11" ON)
 
 # Define the documentation target
 include(nwx_cxx_api_docs)
-nwx_cxx_api_docs("include" "src")
+nwx_cxx_api_docs("cxx/include" "cxx/src")
 
 # Build the Library
-file(GLOB_RECURSE WTF_HEADER_FILES CONFIGURE_DEPENDS include/wtf/*.hpp)
-file(GLOB_RECURSE WTF_SOURCE_FILES CONFIGURE_DEPENDS src/wtf/*.cpp)
-add_library(${PROJECT_NAME} ${WTF_SOURCE_FILES})
-target_link_libraries(${PROJECT_NAME})
-target_include_directories(${PROJECT_NAME}
-    PUBLIC
-        $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
-        $<INSTALL_INTERFACE:include>
-)
-
-if(${BUILD_TESTING})
-    include(CTest)
-    get_dependencies(catch2)
-    include(cmake/catch2_tests_from_dir.cmake)
-    catch2_tests_from_dir(
-        "unit_test_${PROJECT_NAME}"
-        tests/unit_tests/wtf
-        ${PROJECT_NAME}
-    )
-endif()
-
-include(cmake/install_target.cmake)
-install_library(
+include(nwx_library)
+nwx_library(${PROJECT_NAME} "cxx/include" "cxx/src")
+
+# Register the C++ tests
+include(catch2_tests_from_dir)
+catch2_tests_from_dir(
+    "unit_test_${PROJECT_NAME}"
+    "tests/cxx/unit_tests/${PROJECT_NAME}"
     ${PROJECT_NAME}
-    "${CMAKE_CURRENT_SOURCE_DIR}/include/${PROJECT_NAME}"
 )
+
+# Register the Python module
+include(nwx_python_module)
+nwx_python_module(${PROJECT_NAME} "cxx/src")
diff --git a/README.md b/README.md
index 87bad22..64dca16 100644
--- a/README.md
+++ b/README.md
@@ -25,6 +25,42 @@ writes their interfaces in terms of "weakly typed" objects like `Float` and
 `FloatBuffer`, and determination of the actual floating-point type is deferred
 to runtime.
 
+## Development Setup
+
+### Prerequisites
+
+- CMake >= 3.14
+- A C++20-capable compiler
+- Python >= 3.8
+
+### Editable install
+
+Create and activate a virtual environment, then install the package in editable
+(dev) mode. This builds the Python bindings and the C++ test suite:
+
+```bash
+python3 -m venv .venv
+source .venv/bin/activate
+pip install -e ".[dev]"
+```
+
+### Running the C++ tests
+
+The editable install keeps its build tree in `build/` (configured via
+`build-dir` in `pyproject.toml`). Run CTest directly from there:
+
+```bash
+cd build && ctest --output-on-failure
+```
+
+### Running the Python tests
+
+With the virtual environment active:
+
+```bash
+pytest tests/python/
+```
+
 ## Problem Description
 
 Full description (TODO: Add link to the documentation)
diff --git a/cmake/catch2_tests_from_dir.cmake b/cmake/catch2_tests_from_dir.cmake
deleted file mode 100644
index 782cfa2..0000000
--- a/cmake/catch2_tests_from_dir.cmake
+++ /dev/null
@@ -1,29 +0,0 @@
-# Copyright 2025 NWChemEx-Project
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-# http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-include_guard()
-
-function(catch2_tests_from_dir ctfd_target_name ctfd_dir)
-    file(GLOB_RECURSE ctfd_test_files CONFIGURE_DEPENDS ${ctfd_dir}/*.cpp)
-
-    add_executable(${ctfd_target_name} ${ctfd_test_files})
-
-    target_link_libraries(
-        ${ctfd_target_name} PRIVATE Catch2::Catch2WithMain ${ARGN})
-
-        add_test(NAME ${ctfd_target_name}
-             COMMAND ${ctfd_target_name}
-             WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
-    )
-endfunction()
diff --git a/cmake/dependencies/catch2.cmake b/cmake/dependencies/catch2.cmake
deleted file mode 100644
index e78a197..0000000
--- a/cmake/dependencies/catch2.cmake
+++ /dev/null
@@ -1,22 +0,0 @@
-# Copyright 2025 NWChemEx-Project
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-# http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-include_guard()
-include(FetchContent)
-
-FetchContent_Declare(
-    catch2
-    GIT_REPOSITORY https://github.com/catchorg/Catch2
-    GIT_TAG "v3.11.0"
-)
diff --git a/cmake/get_dependencies.cmake b/cmake/get_dependencies.cmake
deleted file mode 100644
index f89bbec..0000000
--- a/cmake/get_dependencies.cmake
+++ /dev/null
@@ -1,25 +0,0 @@
-# Copyright 2025 NWChemEx-Project
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-# http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-include_guard()
-include(FetchContent)
-
-function(get_dependencies)
-    foreach(depend_i ${ARGN})
-        message(STATUS "Fetching dependency: ${depend_i}")
-        include("cmake/dependencies/${depend_i}.cmake")
-    endforeach()
-
-    FetchContent_MakeAvailable(${ARGN})
-endfunction()
diff --git a/cmake/get_nwx_cmake.cmake b/cmake/get_nwx_cmake.cmake
index de8c4bc..1b29ea6 100644
--- a/cmake/get_nwx_cmake.cmake
+++ b/cmake/get_nwx_cmake.cmake
@@ -18,7 +18,7 @@ macro(get_nwx_cmake)
     include(FetchContent)
     FetchContent_Declare(
         nwx_cmake
-        GIT_REPOSITORY https://github.com/NWChemEx/NWXCMake
+        GIT_REPOSITORY https://github.com/ryanmrichard/NWXCMake
     )
     FetchContent_MakeAvailable(nwx_cmake)
     set(
diff --git a/cmake/install_target.cmake b/cmake/install_target.cmake
deleted file mode 100644
index 784fed3..0000000
--- a/cmake/install_target.cmake
+++ /dev/null
@@ -1,68 +0,0 @@
-# Copyright 2025 NWChemEx-Project
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-# http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-include_guard()
-
-function(write_config_file wcf_file)
-    file(WRITE "${wcf_file}" "") # Erases it if it already exists
-    file(APPEND
-        "${wcf_file}"
-        "get_filename_component(_IL_CONFIG_DIR "
-        "\"\${CMAKE_CURRENT_LIST_FILE}\" PATH)\n"
-    )
-    file(APPEND
-        "${wcf_file}"
-        "include(\"\${_IL_CONFIG_DIR}/${il_name}Targets.cmake\")\n"
-    )
-endfunction()
-
-function(install_library il_name il_header_dir)
-    #TODO: Get these values programmatically
-    set(_il_archive_dir lib)
-    set(_il_library_dir lib)
-    set(_il_runtime_dir bin)
-    set(_il_includes_dir include)
-
-    # -- Install target that is a library --
-    install(TARGETS ${il_name}
-        EXPORT ${il_name}Targets
-        ARCHIVE DESTINATION "${_il_archive_dir}"
-        LIBRARY DESTINATION "${_il_library_dir}"
-        RUNTIME DESTINATION "${_il_runtime_dir}"
-        INCLUDES DESTINATION "${_il_includes_dir}"
-    )
-
-    # -- Install CMake Config Files --
-    install(EXPORT ${il_name}Targets
-        FILE ${il_name}Targets.cmake
-        NAMESPACE nwx::
-        DESTINATION "${_il_library_dir}/cmake/${il_name}"
-    )
-
-    set(_il_config_file "${CMAKE_CURRENT_BINARY_DIR}/${il_name}Config.cmake")
-    write_config_file("${_il_config_file}")
-
-    install(FILES "${_il_config_file}"
-        DESTINATION "${_il_library_dir}/cmake/${il_name}"
-    )
-
-    # -- Install Headers --
-    #TODO: Assert il_header_dir isn't empty
-    install(DIRECTORY "${il_header_dir}"
-        DESTINATION "${_il_includes_dir}"
-        FILES_MATCHING
-            PATTERN "*.hpp"
-            PATTERN "*.h"
-    )
-endfunction()
diff --git a/include/wtf/buffer/buffer.hpp b/cxx/include/wtf/buffer/buffer.hpp
similarity index 100%
rename from include/wtf/buffer/buffer.hpp
rename to cxx/include/wtf/buffer/buffer.hpp
diff --git a/include/wtf/buffer/buffer_view.hpp b/cxx/include/wtf/buffer/buffer_view.hpp
similarity index 100%
rename from include/wtf/buffer/buffer_view.hpp
rename to cxx/include/wtf/buffer/buffer_view.hpp
diff --git a/include/wtf/buffer/detail_/buffer_holder.hpp b/cxx/include/wtf/buffer/detail_/buffer_holder.hpp
similarity index 100%
rename from include/wtf/buffer/detail_/buffer_holder.hpp
rename to cxx/include/wtf/buffer/detail_/buffer_holder.hpp
diff --git a/include/wtf/buffer/detail_/buffer_view_holder.hpp b/cxx/include/wtf/buffer/detail_/buffer_view_holder.hpp
similarity index 100%
rename from include/wtf/buffer/detail_/buffer_view_holder.hpp
rename to cxx/include/wtf/buffer/detail_/buffer_view_holder.hpp
diff --git a/include/wtf/buffer/detail_/contiguous_model.hpp b/cxx/include/wtf/buffer/detail_/contiguous_model.hpp
similarity index 100%
rename from include/wtf/buffer/detail_/contiguous_model.hpp
rename to cxx/include/wtf/buffer/detail_/contiguous_model.hpp
diff --git a/include/wtf/buffer/detail_/contiguous_view_model.hpp b/cxx/include/wtf/buffer/detail_/contiguous_view_model.hpp
similarity index 100%
rename from include/wtf/buffer/detail_/contiguous_view_model.hpp
rename to cxx/include/wtf/buffer/detail_/contiguous_view_model.hpp
diff --git a/include/wtf/buffer/float_buffer.hpp b/cxx/include/wtf/buffer/float_buffer.hpp
similarity index 100%
rename from include/wtf/buffer/float_buffer.hpp
rename to cxx/include/wtf/buffer/float_buffer.hpp
diff --git a/include/wtf/concepts/concepts.hpp b/cxx/include/wtf/concepts/concepts.hpp
similarity index 100%
rename from include/wtf/concepts/concepts.hpp
rename to cxx/include/wtf/concepts/concepts.hpp
diff --git a/include/wtf/concepts/float_buffer.hpp b/cxx/include/wtf/concepts/float_buffer.hpp
similarity index 100%
rename from include/wtf/concepts/float_buffer.hpp
rename to cxx/include/wtf/concepts/float_buffer.hpp
diff --git a/include/wtf/concepts/floating_point.hpp b/cxx/include/wtf/concepts/floating_point.hpp
similarity index 100%
rename from include/wtf/concepts/floating_point.hpp
rename to cxx/include/wtf/concepts/floating_point.hpp
diff --git a/include/wtf/concepts/iterator.hpp b/cxx/include/wtf/concepts/iterator.hpp
similarity index 100%
rename from include/wtf/concepts/iterator.hpp
rename to cxx/include/wtf/concepts/iterator.hpp
diff --git a/include/wtf/concepts/modifiers.hpp b/cxx/include/wtf/concepts/modifiers.hpp
similarity index 100%
rename from include/wtf/concepts/modifiers.hpp
rename to cxx/include/wtf/concepts/modifiers.hpp
diff --git a/include/wtf/concepts/stream_insertion.hpp b/cxx/include/wtf/concepts/stream_insertion.hpp
similarity index 100%
rename from include/wtf/concepts/stream_insertion.hpp
rename to cxx/include/wtf/concepts/stream_insertion.hpp
diff --git a/include/wtf/concepts/wtf_float.hpp b/cxx/include/wtf/concepts/wtf_float.hpp
similarity index 100%
rename from include/wtf/concepts/wtf_float.hpp
rename to cxx/include/wtf/concepts/wtf_float.hpp
diff --git a/include/wtf/detail_/dispatcher.hpp b/cxx/include/wtf/detail_/dispatcher.hpp
similarity index 100%
rename from include/wtf/detail_/dispatcher.hpp
rename to cxx/include/wtf/detail_/dispatcher.hpp
diff --git a/include/wtf/detail_/downcaster.hpp b/cxx/include/wtf/detail_/downcaster.hpp
similarity index 100%
rename from include/wtf/detail_/downcaster.hpp
rename to cxx/include/wtf/detail_/downcaster.hpp
diff --git a/include/wtf/detail_/variant_from_tuple.hpp b/cxx/include/wtf/detail_/variant_from_tuple.hpp
similarity index 100%
rename from include/wtf/detail_/variant_from_tuple.hpp
rename to cxx/include/wtf/detail_/variant_from_tuple.hpp
diff --git a/include/wtf/forward.hpp b/cxx/include/wtf/forward.hpp
similarity index 100%
rename from include/wtf/forward.hpp
rename to cxx/include/wtf/forward.hpp
diff --git a/include/wtf/fp/detail_/float_holder.hpp b/cxx/include/wtf/fp/detail_/float_holder.hpp
similarity index 100%
rename from include/wtf/fp/detail_/float_holder.hpp
rename to cxx/include/wtf/fp/detail_/float_holder.hpp
diff --git a/include/wtf/fp/detail_/float_model.hpp b/cxx/include/wtf/fp/detail_/float_model.hpp
similarity index 100%
rename from include/wtf/fp/detail_/float_model.hpp
rename to cxx/include/wtf/fp/detail_/float_model.hpp
diff --git a/include/wtf/fp/detail_/float_view_holder.hpp b/cxx/include/wtf/fp/detail_/float_view_holder.hpp
similarity index 100%
rename from include/wtf/fp/detail_/float_view_holder.hpp
rename to cxx/include/wtf/fp/detail_/float_view_holder.hpp
diff --git a/include/wtf/fp/detail_/float_view_model.hpp b/cxx/include/wtf/fp/detail_/float_view_model.hpp
similarity index 100%
rename from include/wtf/fp/detail_/float_view_model.hpp
rename to cxx/include/wtf/fp/detail_/float_view_model.hpp
diff --git a/include/wtf/fp/float.hpp b/cxx/include/wtf/fp/float.hpp
similarity index 100%
rename from include/wtf/fp/float.hpp
rename to cxx/include/wtf/fp/float.hpp
diff --git a/include/wtf/fp/float_base.hpp b/cxx/include/wtf/fp/float_base.hpp
similarity index 100%
rename from include/wtf/fp/float_base.hpp
rename to cxx/include/wtf/fp/float_base.hpp
diff --git a/include/wtf/fp/float_view.hpp b/cxx/include/wtf/fp/float_view.hpp
similarity index 100%
rename from include/wtf/fp/float_view.hpp
rename to cxx/include/wtf/fp/float_view.hpp
diff --git a/include/wtf/fp/fp.hpp b/cxx/include/wtf/fp/fp.hpp
similarity index 100%
rename from include/wtf/fp/fp.hpp
rename to cxx/include/wtf/fp/fp.hpp
diff --git a/include/wtf/rtti/detail_/type_holder.hpp b/cxx/include/wtf/rtti/detail_/type_holder.hpp
similarity index 100%
rename from include/wtf/rtti/detail_/type_holder.hpp
rename to cxx/include/wtf/rtti/detail_/type_holder.hpp
diff --git a/include/wtf/rtti/detail_/type_model.hpp b/cxx/include/wtf/rtti/detail_/type_model.hpp
similarity index 100%
rename from include/wtf/rtti/detail_/type_model.hpp
rename to cxx/include/wtf/rtti/detail_/type_model.hpp
diff --git a/include/wtf/rtti/rtti.hpp b/cxx/include/wtf/rtti/rtti.hpp
similarity index 100%
rename from include/wtf/rtti/rtti.hpp
rename to cxx/include/wtf/rtti/rtti.hpp
diff --git a/include/wtf/rtti/type_info.hpp b/cxx/include/wtf/rtti/type_info.hpp
similarity index 100%
rename from include/wtf/rtti/type_info.hpp
rename to cxx/include/wtf/rtti/type_info.hpp
diff --git a/include/wtf/type_traits/float_traits.hpp b/cxx/include/wtf/type_traits/float_traits.hpp
similarity index 100%
rename from include/wtf/type_traits/float_traits.hpp
rename to cxx/include/wtf/type_traits/float_traits.hpp
diff --git a/include/wtf/type_traits/is_convertible.hpp b/cxx/include/wtf/type_traits/is_convertible.hpp
similarity index 100%
rename from include/wtf/type_traits/is_convertible.hpp
rename to cxx/include/wtf/type_traits/is_convertible.hpp
diff --git a/include/wtf/type_traits/is_floating_point.hpp b/cxx/include/wtf/type_traits/is_floating_point.hpp
similarity index 100%
rename from include/wtf/type_traits/is_floating_point.hpp
rename to cxx/include/wtf/type_traits/is_floating_point.hpp
diff --git a/include/wtf/type_traits/precision.hpp b/cxx/include/wtf/type_traits/precision.hpp
similarity index 100%
rename from include/wtf/type_traits/precision.hpp
rename to cxx/include/wtf/type_traits/precision.hpp
diff --git a/include/wtf/type_traits/tuple_append.hpp b/cxx/include/wtf/type_traits/tuple_append.hpp
similarity index 100%
rename from include/wtf/type_traits/tuple_append.hpp
rename to cxx/include/wtf/type_traits/tuple_append.hpp
diff --git a/include/wtf/type_traits/type_name.hpp b/cxx/include/wtf/type_traits/type_name.hpp
similarity index 100%
rename from include/wtf/type_traits/type_name.hpp
rename to cxx/include/wtf/type_traits/type_name.hpp
diff --git a/include/wtf/type_traits/type_traits.hpp b/cxx/include/wtf/type_traits/type_traits.hpp
similarity index 100%
rename from include/wtf/type_traits/type_traits.hpp
rename to cxx/include/wtf/type_traits/type_traits.hpp
diff --git a/include/wtf/types.hpp b/cxx/include/wtf/types.hpp
similarity index 100%
rename from include/wtf/types.hpp
rename to cxx/include/wtf/types.hpp
diff --git a/include/wtf/warnings.hpp b/cxx/include/wtf/warnings.hpp
similarity index 100%
rename from include/wtf/warnings.hpp
rename to cxx/include/wtf/warnings.hpp
diff --git a/include/wtf/wtf.hpp b/cxx/include/wtf/wtf.hpp
similarity index 100%
rename from include/wtf/wtf.hpp
rename to cxx/include/wtf/wtf.hpp
diff --git a/cxx/src/wtf/export_wtf.cpp b/cxx/src/wtf/export_wtf.cpp
new file mode 100644
index 0000000..d37b67d
--- /dev/null
+++ b/cxx/src/wtf/export_wtf.cpp
@@ -0,0 +1,23 @@
+/*
+ * Copyright 2025 NWChemEx-Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "export_wtf.hpp"
+
+namespace wtf {
+
+PYBIND11_MODULE(wtf, m) { fp::export_float(m); }
+
+} // namespace wtf
diff --git a/cxx/src/wtf/export_wtf.hpp b/cxx/src/wtf/export_wtf.hpp
new file mode 100644
index 0000000..08dd4ee
--- /dev/null
+++ b/cxx/src/wtf/export_wtf.hpp
@@ -0,0 +1,25 @@
+/*
+ * Copyright 2025 NWChemEx-Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+#include <pybind11/pybind11.h>
+
+namespace wtf {
+namespace fp {
+/** @brief Exports the wtf::fp::Float class to the Python module @p m. */
+void export_float(pybind11::module_& m);
+} // namespace fp
+} // namespace wtf
diff --git a/src/wtf/fp/detail_/float_holder.cpp b/cxx/src/wtf/fp/detail_/float_holder.cpp
similarity index 100%
rename from src/wtf/fp/detail_/float_holder.cpp
rename to cxx/src/wtf/fp/detail_/float_holder.cpp
diff --git a/cxx/src/wtf/fp/export_float.cpp b/cxx/src/wtf/fp/export_float.cpp
new file mode 100644
index 0000000..34ca821
--- /dev/null
+++ b/cxx/src/wtf/fp/export_float.cpp
@@ -0,0 +1,28 @@
+/*
+ * Copyright 2025 NWChemEx-Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "../export_wtf.hpp"
+#include <wtf/fp/float.hpp>
+
+namespace wtf::fp {
+
+void export_float(pybind11::module_& m) {
+    pybind11::class_<wtf::fp::Float>(m, "Float")
+      .def(pybind11::init<double>())
+      .def("to_string", &wtf::fp::Float::to_string);
+}
+
+} // namespace wtf::fp
diff --git a/src/wtf/fp/float.cpp b/cxx/src/wtf/fp/float.cpp
similarity index 100%
rename from src/wtf/fp/float.cpp
rename to cxx/src/wtf/fp/float.cpp
diff --git a/src/wtf/rtti/detail_/type_holder.cpp b/cxx/src/wtf/rtti/detail_/type_holder.cpp
similarity index 100%
rename from src/wtf/rtti/detail_/type_holder.cpp
rename to cxx/src/wtf/rtti/detail_/type_holder.cpp
diff --git a/src/wtf/rtti/type_info.cpp b/cxx/src/wtf/rtti/type_info.cpp
similarity index 100%
rename from src/wtf/rtti/type_info.cpp
rename to cxx/src/wtf/rtti/type_info.cpp
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..45a0bbe
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,41 @@
+# Copyright 2026 NWChemEx-Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+[build-system]
+requires = ["scikit-build-core>=0.10", "pybind11", "setuptools-scm>=8"]
+build-backend = "scikit_build_core.build"
+
+[project]
+name = "weaklytypedfloat"
+dynamic = ["version"]
+description = "Weakly Typed Float — a DSL for type-erased floating-point types"
+license = { text = "Apache-2.0" }
+requires-python = ">=3.8"
+
+[project.optional-dependencies]
+dev = ["pytest"]
+
+[tool.scikit-build]
+metadata.version.provider = "scikit_build_core.metadata.setuptools_scm"
+cmake.build-type = "Release"
+cmake.args = ["-DBUILD_PYBIND11_BINDINGS=ON", "-DBUILD_TESTING=OFF"]
+wheel.packages = []
+build-dir = "build"
+
+[tool.setuptools_scm]
+fallback_version = "0.0.0"
+
+[[tool.scikit-build.overrides]]
+if.state = "editable"
+cmake.args = ["-DBUILD_PYBIND11_BINDINGS=ON", "-DBUILD_TESTING=ON"]
diff --git a/tests/test_wtf.hpp b/tests/cxx/test_wtf.hpp
similarity index 100%
rename from tests/test_wtf.hpp
rename to tests/cxx/test_wtf.hpp
diff --git a/tests/unit_tests/wtf/buffer/buffer_view.cpp b/tests/cxx/unit_tests/wtf/buffer/buffer_view.cpp
similarity index 100%
rename from tests/unit_tests/wtf/buffer/buffer_view.cpp
rename to tests/cxx/unit_tests/wtf/buffer/buffer_view.cpp
diff --git a/tests/unit_tests/wtf/buffer/detail_/buffer_holder.cpp b/tests/cxx/unit_tests/wtf/buffer/detail_/buffer_holder.cpp
similarity index 100%
rename from tests/unit_tests/wtf/buffer/detail_/buffer_holder.cpp
rename to tests/cxx/unit_tests/wtf/buffer/detail_/buffer_holder.cpp
diff --git a/tests/unit_tests/wtf/buffer/detail_/buffer_view_holder.cpp b/tests/cxx/unit_tests/wtf/buffer/detail_/buffer_view_holder.cpp
similarity index 100%
rename from tests/unit_tests/wtf/buffer/detail_/buffer_view_holder.cpp
rename to tests/cxx/unit_tests/wtf/buffer/detail_/buffer_view_holder.cpp
diff --git a/tests/unit_tests/wtf/buffer/detail_/contiguous_model.cpp b/tests/cxx/unit_tests/wtf/buffer/detail_/contiguous_model.cpp
similarity index 100%
rename from tests/unit_tests/wtf/buffer/detail_/contiguous_model.cpp
rename to tests/cxx/unit_tests/wtf/buffer/detail_/contiguous_model.cpp
diff --git a/tests/unit_tests/wtf/buffer/detail_/contiguous_view_model.cpp b/tests/cxx/unit_tests/wtf/buffer/detail_/contiguous_view_model.cpp
similarity index 100%
rename from tests/unit_tests/wtf/buffer/detail_/contiguous_view_model.cpp
rename to tests/cxx/unit_tests/wtf/buffer/detail_/contiguous_view_model.cpp
diff --git a/tests/unit_tests/wtf/buffer/float_buffer.cpp b/tests/cxx/unit_tests/wtf/buffer/float_buffer.cpp
similarity index 100%
rename from tests/unit_tests/wtf/buffer/float_buffer.cpp
rename to tests/cxx/unit_tests/wtf/buffer/float_buffer.cpp
diff --git a/tests/unit_tests/wtf/concepts/floating_point.cpp b/tests/cxx/unit_tests/wtf/concepts/floating_point.cpp
similarity index 100%
rename from tests/unit_tests/wtf/concepts/floating_point.cpp
rename to tests/cxx/unit_tests/wtf/concepts/floating_point.cpp
diff --git a/tests/unit_tests/wtf/concepts/iterator.cpp b/tests/cxx/unit_tests/wtf/concepts/iterator.cpp
similarity index 100%
rename from tests/unit_tests/wtf/concepts/iterator.cpp
rename to tests/cxx/unit_tests/wtf/concepts/iterator.cpp
diff --git a/tests/unit_tests/wtf/concepts/modifiers.cpp b/tests/cxx/unit_tests/wtf/concepts/modifiers.cpp
similarity index 100%
rename from tests/unit_tests/wtf/concepts/modifiers.cpp
rename to tests/cxx/unit_tests/wtf/concepts/modifiers.cpp
diff --git a/tests/unit_tests/wtf/concepts/stream_insertion.cpp b/tests/cxx/unit_tests/wtf/concepts/stream_insertion.cpp
similarity index 100%
rename from tests/unit_tests/wtf/concepts/stream_insertion.cpp
rename to tests/cxx/unit_tests/wtf/concepts/stream_insertion.cpp
diff --git a/tests/unit_tests/wtf/concepts/wtf_float.cpp b/tests/cxx/unit_tests/wtf/concepts/wtf_float.cpp
similarity index 100%
rename from tests/unit_tests/wtf/concepts/wtf_float.cpp
rename to tests/cxx/unit_tests/wtf/concepts/wtf_float.cpp
diff --git a/tests/unit_tests/wtf/detail_/dispatcher.cpp b/tests/cxx/unit_tests/wtf/detail_/dispatcher.cpp
similarity index 100%
rename from tests/unit_tests/wtf/detail_/dispatcher.cpp
rename to tests/cxx/unit_tests/wtf/detail_/dispatcher.cpp
diff --git a/tests/unit_tests/wtf/detail_/downcaster.cpp b/tests/cxx/unit_tests/wtf/detail_/downcaster.cpp
similarity index 100%
rename from tests/unit_tests/wtf/detail_/downcaster.cpp
rename to tests/cxx/unit_tests/wtf/detail_/downcaster.cpp
diff --git a/tests/unit_tests/wtf/detail_/variant_from_tuple.cpp b/tests/cxx/unit_tests/wtf/detail_/variant_from_tuple.cpp
similarity index 100%
rename from tests/unit_tests/wtf/detail_/variant_from_tuple.cpp
rename to tests/cxx/unit_tests/wtf/detail_/variant_from_tuple.cpp
diff --git a/tests/unit_tests/wtf/fp/detail_/float_holder.cpp b/tests/cxx/unit_tests/wtf/fp/detail_/float_holder.cpp
similarity index 100%
rename from tests/unit_tests/wtf/fp/detail_/float_holder.cpp
rename to tests/cxx/unit_tests/wtf/fp/detail_/float_holder.cpp
diff --git a/tests/unit_tests/wtf/fp/detail_/float_model.cpp b/tests/cxx/unit_tests/wtf/fp/detail_/float_model.cpp
similarity index 100%
rename from tests/unit_tests/wtf/fp/detail_/float_model.cpp
rename to tests/cxx/unit_tests/wtf/fp/detail_/float_model.cpp
diff --git a/tests/unit_tests/wtf/fp/detail_/float_view_holder.cpp b/tests/cxx/unit_tests/wtf/fp/detail_/float_view_holder.cpp
similarity index 100%
rename from tests/unit_tests/wtf/fp/detail_/float_view_holder.cpp
rename to tests/cxx/unit_tests/wtf/fp/detail_/float_view_holder.cpp
diff --git a/tests/unit_tests/wtf/fp/detail_/float_view_model.cpp b/tests/cxx/unit_tests/wtf/fp/detail_/float_view_model.cpp
similarity index 100%
rename from tests/unit_tests/wtf/fp/detail_/float_view_model.cpp
rename to tests/cxx/unit_tests/wtf/fp/detail_/float_view_model.cpp
diff --git a/tests/unit_tests/wtf/fp/float.cpp b/tests/cxx/unit_tests/wtf/fp/float.cpp
similarity index 100%
rename from tests/unit_tests/wtf/fp/float.cpp
rename to tests/cxx/unit_tests/wtf/fp/float.cpp
diff --git a/tests/unit_tests/wtf/fp/float_view.cpp b/tests/cxx/unit_tests/wtf/fp/float_view.cpp
similarity index 100%
rename from tests/unit_tests/wtf/fp/float_view.cpp
rename to tests/cxx/unit_tests/wtf/fp/float_view.cpp
diff --git a/tests/unit_tests/wtf/main.cpp b/tests/cxx/unit_tests/wtf/main.cpp
similarity index 100%
rename from tests/unit_tests/wtf/main.cpp
rename to tests/cxx/unit_tests/wtf/main.cpp
diff --git a/tests/unit_tests/wtf/rtti/detail_/type_holder.cpp b/tests/cxx/unit_tests/wtf/rtti/detail_/type_holder.cpp
similarity index 100%
rename from tests/unit_tests/wtf/rtti/detail_/type_holder.cpp
rename to tests/cxx/unit_tests/wtf/rtti/detail_/type_holder.cpp
diff --git a/tests/unit_tests/wtf/rtti/detail_/type_model.cpp b/tests/cxx/unit_tests/wtf/rtti/detail_/type_model.cpp
similarity index 100%
rename from tests/unit_tests/wtf/rtti/detail_/type_model.cpp
rename to tests/cxx/unit_tests/wtf/rtti/detail_/type_model.cpp
diff --git a/tests/unit_tests/wtf/rtti/type_info.cpp b/tests/cxx/unit_tests/wtf/rtti/type_info.cpp
similarity index 100%
rename from tests/unit_tests/wtf/rtti/type_info.cpp
rename to tests/cxx/unit_tests/wtf/rtti/type_info.cpp
diff --git a/tests/unit_tests/wtf/type_traits/float_traits.cpp b/tests/cxx/unit_tests/wtf/type_traits/float_traits.cpp
similarity index 100%
rename from tests/unit_tests/wtf/type_traits/float_traits.cpp
rename to tests/cxx/unit_tests/wtf/type_traits/float_traits.cpp
diff --git a/tests/unit_tests/wtf/type_traits/is_convertible.cpp b/tests/cxx/unit_tests/wtf/type_traits/is_convertible.cpp
similarity index 100%
rename from tests/unit_tests/wtf/type_traits/is_convertible.cpp
rename to tests/cxx/unit_tests/wtf/type_traits/is_convertible.cpp
diff --git a/tests/unit_tests/wtf/type_traits/is_floating_point.cpp b/tests/cxx/unit_tests/wtf/type_traits/is_floating_point.cpp
similarity index 100%
rename from tests/unit_tests/wtf/type_traits/is_floating_point.cpp
rename to tests/cxx/unit_tests/wtf/type_traits/is_floating_point.cpp
diff --git a/tests/unit_tests/wtf/type_traits/precision.cpp b/tests/cxx/unit_tests/wtf/type_traits/precision.cpp
similarity index 100%
rename from tests/unit_tests/wtf/type_traits/precision.cpp
rename to tests/cxx/unit_tests/wtf/type_traits/precision.cpp
diff --git a/tests/unit_tests/wtf/type_traits/tupple_append.cpp b/tests/cxx/unit_tests/wtf/type_traits/tupple_append.cpp
similarity index 100%
rename from tests/unit_tests/wtf/type_traits/tupple_append.cpp
rename to tests/cxx/unit_tests/wtf/type_traits/tupple_append.cpp
diff --git a/tests/unit_tests/wtf/type_traits/type_name.cpp b/tests/cxx/unit_tests/wtf/type_traits/type_name.cpp
similarity index 100%
rename from tests/unit_tests/wtf/type_traits/type_name.cpp
rename to tests/cxx/unit_tests/wtf/type_traits/type_name.cpp
diff --git a/cmake/disable_in_source_builds.cmake b/tests/python/unit_tests/fp/test_float.py
similarity index 63%
rename from cmake/disable_in_source_builds.cmake
rename to tests/python/unit_tests/fp/test_float.py
index a98cc9f..fa482a3 100644
--- a/cmake/disable_in_source_builds.cmake
+++ b/tests/python/unit_tests/fp/test_float.py
@@ -1,4 +1,4 @@
-# Copyright 2025 NWChemEx-Project
+# Copyright 2026 NWChemEx-Project
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -12,12 +12,21 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-include_guard()
+"""Unit tests for the wtf.Float Python binding."""
 
-function(disable_in_source_builds)
-    if("${PROJECT_SOURCE_DIR}" STREQUAL "${PROJECT_BINARY_DIR}")
-       message(FATAL_ERROR "In-source builds are not allowed.")
-    endif()
-endfunction()
+import wtf
 
-disable_in_source_builds()
+
+def test_import():
+    assert hasattr(wtf, "Float")
+
+
+def test_set_value():
+    f = wtf.Float(3.14)
+    assert f is not None
+
+
+def test_to_string():
+    f = wtf.Float(3.14)
+    s = f.to_string()
+    assert "3.14" in s