diff --git a/.ci/azure/run_tests.sh b/.ci/azure/run_tests.sh
index 3ba8537f1..38f2d37b1 100755
--- a/.ci/azure/run_tests.sh
+++ b/.ci/azure/run_tests.sh
@@ -10,23 +10,19 @@ test_args=""
 
 source activate discretize-test
 
-if ${do_doc}
-then
-  if ${is_azure}
-  then
+if [[ "$is_azure" == "true" ]]; then
+  if [[ "$do_doc" == "true" ]]; then
     .ci/setup_headless_display.sh
   fi
 fi
-if ${do_cov}
-then
+if [[ "do_cov" == "true" ]]; then
   echo "Testing with coverage"
   test_args="--cov --cov-config=pyproject.toml $test_args"
 fi
 
 pytest -vv $test_args
 
-if ${do_cov}
-then
+if [[ "do_cov" == "true" ]]; then
   coverage xml
 fi
 
diff --git a/.ci/azure/setup_env.sh b/.ci/azure/setup_env.sh
index 0bbeb76ca..11baca133 100755
--- a/.ci/azure/setup_env.sh
+++ b/.ci/azure/setup_env.sh
@@ -6,17 +6,15 @@ is_azure=$(echo "${TF_BUILD:-false}" | tr '[:upper:]' '[:lower:]')
 do_doc=$(echo "${DOC_BUILD:-false}" | tr '[:upper:]' '[:lower:]')
 is_free_threaded=$(echo "${PYTHON_FREETHREADING:-false}" | tr '[:upper:]' '[:lower:]')
 is_rc=$(echo "${PYTHON_RELEASE_CANDIDATE:-false}" | tr '[:upper:]' '[:lower:]')
+is_bare=$(echo "${ENVIRON_BARE:-false}" | tr '[:upper:]' '[:lower:]')
 
-if ${is_azure}
-then
-  if ${do_doc}
-  then
+if [[ "$is_azure" == "true" ]]; then
+  if [[ "$do_doc" == "true" ]]; then
     .ci/setup_headless_display.sh
   fi
 fi
 
-if ${is_free_threaded}
-then
+if [[ "$is_free_threaded" == "true" || "$is_bare" == "true" ]]; then
   cp .ci/environment_test_bare.yml environment_test_with_pyversion.yml
   echo "  - python-freethreading="$PYTHON_VERSION >> environment_test_with_pyversion.yml
 else
@@ -24,15 +22,13 @@ else
   echo "  - python="$PYTHON_VERSION >> environment_test_with_pyversion.yml
 fi
 
-if ${is_rc}
-then
+if [[ "$is_rc" == "true" ]]; then
   sed -i '/^channels:/a\  - conda-forge/label/python_rc' environment_test_with_pyversion.yml
 fi
 conda env create --file environment_test_with_pyversion.yml
 rm environment_test_with_pyversion.yml
 
-if ${is_azure}
-then
+if [[ "$is_azure" == "true" ]]; then
   source activate discretize-test
   pip install pytest-azurepipelines
 else
diff --git a/.ci/azure/test.yml b/.ci/azure/test.yml
index d5aee98b7..04599008a 100644
--- a/.ci/azure/test.yml
+++ b/.ci/azure/test.yml
@@ -15,17 +15,18 @@ jobs:
       linux-Python313t:
         image: ubuntu-latest
         python.version: '3.13'
+        environ.bare: True
         python.freethreading: True
         coverage: True
       linux-Python314:
         image: ubuntu-latest
+        environ.bare: True
         python.version: '3.14'
-        python.release_candidate: True
       linux-Python314t:
         image: ubuntu-latest
         python.version: '3.14'
+        environ.bare: True
         python.freethreading: True
-        python.release_candidate: True
       osx-Python311:
         image: macOS-latest
         python.version: '3.11'
@@ -39,6 +40,15 @@ jobs:
         image: macOS-latest
         python.version: '3.13'
         python.freethreading: True
+      osx-Python314:
+        image: macOS-latest
+        python.version: '3.14'
+        environ.bare: True
+      osx-Python314t:
+        image: macOS-latest
+        python.version: '3.14'
+        environ.bare: True
+        python.freethreading: True
       win-Python311:
         image: windows-latest
         python.version: '3.11'
@@ -51,6 +61,16 @@ jobs:
       win-Python313t:
         image: windows-latest
         python.version: '3.13'
+        environ.bare: True
+        python.freethreading: True
+      win-Python314:
+        image: windows-latest
+        environ.bare: True
+        python.version: '3.14'
+      win-Python314t:
+        image: windows-latest
+        python.version: '3.14'
+        environ.bare: True
         python.freethreading: True
   displayName: "${{ variables.image }} ${{ variables.python.version }}"
   pool:
diff --git a/README.rst b/README.rst
index 750047f49..f78734993 100644
--- a/README.rst
+++ b/README.rst
@@ -114,7 +114,7 @@ Code:
 https://github.com/simpeg/discretize
 
 Tests:
-https://travis-ci.org/simpeg/discretize
+https://dev.azure.com/simpeg/discretize/_build
 
 Bugs & Issues:
 https://github.com/simpeg/discretize/issues
diff --git a/docs/_static/versions.json b/docs/_static/versions.json
index 8ba597fb2..034006ddd 100644
--- a/docs/_static/versions.json
+++ b/docs/_static/versions.json
@@ -4,11 +4,16 @@
         "url": "https://discretize.simpeg.xyz/en/main/"
     },
     {
-        "name": "0.11.3 (stable)",
-        "version": "v0.11.3",
-        "url": "https://discretize.simpeg.xyz/en/v0.11.3/",
+        "name": "0.12.0 (stable)",
+        "version": "v0.12.0",
+        "url": "https://discretize.simpeg.xyz/en/v0.12.0/",
         "preferred": true
     },
+    {
+        "name": "0.11.3",
+        "version": "v0.11.3",
+        "url": "https://discretize.simpeg.xyz/en/v0.11.3/"
+    },
     {
         "name": "0.11.2",
         "version": "v0.11.2",
diff --git a/docs/release/0.12.0-notes.rst b/docs/release/0.12.0-notes.rst
new file mode 100644
index 000000000..3e20fb64f
--- /dev/null
+++ b/docs/release/0.12.0-notes.rst
@@ -0,0 +1,44 @@
+.. currentmodule:: discretize
+
+.. _0.12.0_notes:
+
+===================================
+``discretize`` 0.12.0 Release Notes
+===================================
+
+October 8, 2025
+
+This minor release contains many bugfixes and updates related to new package builds.
+
+Python versions
+---------------
+`discretize` has bumped its minimum supported `python` version to 3.11, and is tested against versions 3.11-3.14. Minimum scipy versions
+have also been bumped to 1.12. Users on older python versions should continue to use `discretize` 0.11.x.
+
+We have also added support for (and tests against) free-threaded python builds for python 3.13 and later, which should be available through
+the normal python distribution channels (pypi, conda-forge).
+
+``TreeMesh`` updates
+--------------------
+Tree meshes now support a `refine_image` method that allows users to refine a mesh based on an image (2D or 3D numpy array). See
+:func:``discretize.TreeMesh.refine_image`` for more details.
+
+``TensorMesh`` updates
+----------------------
+A new :func:``discretize.TensorMesh.point2index`` method has been added to convert a point location to the corresponding cell index in
+a tensor mesh, similar to the existing :func:``discretize.TreeMesh.point2index`` method.
+
+
+Contributors
+============
+
+* @jcapriot
+
+Pull requests
+=============
+* bump sphinx and pydata-sphinx to more recent versions by @jcapriot in `#402 <https://github.com/simpeg/discretize/pull/402>`__
+* Small cleanups to the external TreeMesh code, no functionality changes by @jcapriot in `#400 <https://github.com/simpeg/discretize/pull/400>`__
+* Add point2index functionality for `tensor_mesh` by @jcapriot in `#401 <https://github.com/simpeg/discretize/pull/401>`__
+* Updates for python free threading by @jcapriot in `#403 <https://github.com/simpeg/discretize/pull/403>`__
+* Updates for cibuildwheel by @jcapriot in `#405 <https://github.com/simpeg/discretize/pull/405>`__
+* Add functionality to refine a `TreeMesh` using an "image" by @jcapriot in `#406 <https://github.com/simpeg/discretize/pull/406>`__
diff --git a/docs/release/index.rst b/docs/release/index.rst
index d7340f2eb..ae054a53e 100644
--- a/docs/release/index.rst
+++ b/docs/release/index.rst
@@ -4,6 +4,7 @@ Release Notes
 .. toctree::
    :maxdepth: 2
 
+   0.12.0  <0.12.0-notes>
    0.11.3  <0.11.3-notes>
    0.11.2  <0.11.2-notes>
    0.11.1  <0.11.1-notes>
diff --git a/pyproject.toml b/pyproject.toml
index 8186b25cf..ca8148a9d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -89,10 +89,10 @@ style = [
     "flake8-pyproject==1.2.3",
 ]
 build = [
-    "meson-python>=0.14.0",
+    "meson-python>=0.15.0",
     "meson",
     "ninja",
-    "numpy>=1.22.4",
+    "numpy>=2.0.0rc1",
     "cython>=3.1.0",
     "setuptools_scm",
 ]