From fdd965ac07dbb3d66c4b457847fd77ac7f02b236 Mon Sep 17 00:00:00 2001
From: Nikhil Dabas <nikhil@nikhildabas.com>
Date: Thu, 27 Aug 2026 11:14:27 +0100
Subject: [PATCH 1/3] Add Windows ARM64 build

---
 .github/workflows/release.yml | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index f25a0352..889bde07 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -108,12 +108,15 @@ jobs:
             target: x64
           - runner: windows-latest
             target: x86
+          - runner: windows-11-arm
+            target: aarch64
     steps:
       - uses: actions/checkout@v5
       - uses: actions/setup-python@v6
         with:
+          # CPython has no official Windows ARM64 build before 3.11.
           python-version: |
-            3.10
+            ${{ matrix.platform.target != 'aarch64' && '3.10' || '' }}
             3.11
             3.12
             3.13
@@ -122,7 +125,7 @@ jobs:
             3.15
             3.15t
           allow-prereleases: true
-          architecture: ${{ matrix.platform.target }}
+          architecture: ${{ matrix.platform.target == 'aarch64' && 'arm64' || matrix.platform.target }}
       - name: Build wheels
         uses: PyO3/maturin-action@v1
         with:

From 7d914cd68ba4ef534d27e9b75e153bad85315181 Mon Sep 17 00:00:00 2001
From: Nikhil Dabas <nikhil@nikhildabas.com>
Date: Thu, 27 Aug 2026 12:01:42 +0100
Subject: [PATCH 2/3] Separate Windows build for free-threaded Python

---
 .github/workflows/release.yml | 35 ++++++++++++++++++++++++-----------
 1 file changed, 24 insertions(+), 11 deletions(-)

diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 889bde07..53ddd691 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -106,32 +106,45 @@ jobs:
         platform:
           - runner: windows-latest
             target: x64
+            interpreters: &interpreters '["3.10", "3.11", "3.12", "3.13", "3.14", "3.15"]'
+            free-threaded-interpreters: &free-threaded-interpreters '["3.14t", "3.15t"]'
           - runner: windows-latest
             target: x86
+            interpreters: *interpreters
+            free-threaded-interpreters: *free-threaded-interpreters
+          # setup-python has no Windows ARM64 builds before 3.11.
           - runner: windows-11-arm
             target: aarch64
+            interpreters: '["3.11", "3.12", "3.13", "3.14", "3.15"]'
+            free-threaded-interpreters: *free-threaded-interpreters
     steps:
       - uses: actions/checkout@v5
+
+      # https://github.com/pyo3/maturin-action#windows-build-the-regular-and-free-threaded-interpreters-in-separate-jobs
       - uses: actions/setup-python@v6
         with:
-          # CPython has no official Windows ARM64 build before 3.11.
-          python-version: |
-            ${{ matrix.platform.target != 'aarch64' && '3.10' || '' }}
-            3.11
-            3.12
-            3.13
-            3.14
-            3.14t
-            3.15
-            3.15t
+          python-version: ${{ join(fromJSON(matrix.platform.interpreters), fromJSON('"\n"')) }}
           allow-prereleases: true
           architecture: ${{ matrix.platform.target == 'aarch64' && 'arm64' || matrix.platform.target }}
       - name: Build wheels
         uses: PyO3/maturin-action@v1
         with:
           target: ${{ matrix.platform.target }}
-          args: --release --out dist --find-interpreter
+          args: --release --out dist --interpreter ${{ join(fromJSON(matrix.platform.interpreters), ' ') }}
           sccache: 'true'
+
+      - uses: actions/setup-python@v6
+        with:
+          python-version: ${{ join(fromJSON(matrix.platform.free-threaded-interpreters), fromJSON('"\n"')) }}
+          allow-prereleases: true
+          architecture: ${{ matrix.platform.target == 'aarch64' && 'arm64' || matrix.platform.target }}
+      - name: Build free-threaded wheels
+        uses: PyO3/maturin-action@v1
+        with:
+          target: ${{ matrix.platform.target }}
+          args: --release --out dist --interpreter ${{ join(fromJSON(matrix.platform.free-threaded-interpreters), ' ') }}
+          sccache: 'true'
+
       - name: Upload wheels
         uses: actions/upload-artifact@v4
         with:

From 66a5eb672fe7edc8c6c5e820dac19ad44391b52d Mon Sep 17 00:00:00 2001
From: Nikhil Dabas <nikhil@nikhildabas.com>
Date: Thu, 27 Aug 2026 12:15:40 +0100
Subject: [PATCH 3/3] Update CHANGELOG and AUTHORS

---
 AUTHORS.rst   | 1 +
 CHANGELOG.rst | 1 +
 2 files changed, 2 insertions(+)

diff --git a/AUTHORS.rst b/AUTHORS.rst
index 1bd657fb..9f408c53 100644
--- a/AUTHORS.rst
+++ b/AUTHORS.rst
@@ -12,3 +12,4 @@ Authors
 * Nicholas Bunn - https://github.com/NicholasBunn
 * Nathan McDougall - https://github.com/nathanjmcdougall
 * Oleksandr Zaiats - https://github.com/z4y4ts
+* Nikhil Dabas - https://github.com/ndabas
diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index b289cbc8..6d671cd6 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -9,6 +9,7 @@ latest
   (https://github.com/python-grimp/grimp/issues/308).
 * Officially support freethreaded Python 3.14+.
 * Officially support Python 3.15, including lazy imports.
+* Officially support Windows ARM64 Python 3.11+, including freethreaded 3.14+.
 
 3.15 (2026-07-03)
 -----------------