From 0eeabfb453844b441a4a77097b3d5aa0cb6645b6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Edgar=20Ram=C3=ADrez=20Mondrag=C3=B3n?=
 <16805946+edgarrmondragon@users.noreply.github.com>
Date: Tue, 8 Oct 2024 03:04:56 -0600
Subject: [PATCH 01/15] Add Python 3.13 trove classifier (#626)

---
 pyproject.toml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/pyproject.toml b/pyproject.toml
index d041d4c0..e24f2b88 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -21,6 +21,7 @@ classifiers = [
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.13",
     "Programming Language :: Python :: Implementation :: CPython",
     "Programming Language :: Python :: Implementation :: PyPy",
     "Intended Audience :: Developers",

From 868aa2cd83f39237deb957c68ce7232422a5950b Mon Sep 17 00:00:00 2001
From: Inada Naoki <songofacandy@gmail.com>
Date: Sat, 31 May 2025 12:45:06 +0900
Subject: [PATCH 02/15] update Cython to 3.1.1 (#637)

---
 .github/workflows/test.yml |  9 +++++++--
 pyproject.toml             | 12 +++++++-----
 requirements.txt           |  2 +-
 3 files changed, 15 insertions(+), 8 deletions(-)

diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 530238c9..23d221c8 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -10,7 +10,7 @@ jobs:
     strategy:
       matrix:
         os: ["ubuntu-latest", "windows-latest", "macos-latest"]
-        py: ["3.13-dev", "3.12", "3.11", "3.10", "3.9", "3.8"]
+        py: ["3.14-dev", "3.13", "3.12", "3.11", "3.10", "3.9", "3.8"]
 
     runs-on: ${{ matrix.os }}
     name: Run test with Python ${{ matrix.py }} on ${{ matrix.os }}
@@ -26,10 +26,15 @@ jobs:
           allow-prereleases: true
           cache: "pip"
 
-      - name: Build
+      - name: Prepare
         shell: bash
         run: |
+          pip install -U pip
           pip install -r requirements.txt pytest
+
+      - name: Build
+        shell: bash
+        run: |
           make cython
           pip install .
 
diff --git a/pyproject.toml b/pyproject.toml
index e24f2b88..b1628322 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,10 +1,13 @@
 [build-system]
-requires = ["setuptools >= 69.5.1"]
+# 75.3.0 is the latest version supporting Python 3.8
+requires = ["setuptools >= 75.3.0"]
 build-backend = "setuptools.build_meta"
 
 [project]
 name = "msgpack"
 dynamic = ["version"]
+# `license = "Apache-2.0"` is preferred. But keep old syntax for Python 3.8 compatibility.
+# https://github.com/msgpack/msgpack-python/pull/637
 license = {text="Apache 2.0"}
 authors = [{name="Inada Naoki", email="songofacandy@gmail.com"}]
 description = "MessagePack serializer"
@@ -14,18 +17,17 @@ requires-python = ">=3.8"
 classifiers = [
     "Development Status :: 5 - Production/Stable",
     "Operating System :: OS Independent",
-    "Programming Language :: Python",
-    "Programming Language :: Python :: 3",
+    "Topic :: File Formats",
+    "Intended Audience :: Developers",
     "Programming Language :: Python :: 3.8",
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
     "Programming Language :: Python :: 3.13",
+    "Programming Language :: Python :: 3.14",
     "Programming Language :: Python :: Implementation :: CPython",
     "Programming Language :: Python :: Implementation :: PyPy",
-    "Intended Audience :: Developers",
-    "License :: OSI Approved :: Apache Software License",
 ]
 
 [project.urls]
diff --git a/requirements.txt b/requirements.txt
index b677f068..78a2f38f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1 +1 @@
-Cython~=3.0.11
+Cython~=3.1.1

From cdc764450370ff80e7c83edbe8d015f08f6fb9b3 Mon Sep 17 00:00:00 2001
From: Inada Naoki <songofacandy@gmail.com>
Date: Sun, 1 Jun 2025 16:56:44 +0900
Subject: [PATCH 03/15] update cibuildwheel to v2.23.3 (#638)

---
 .github/workflows/wheel.yml | 13 +++----------
 1 file changed, 3 insertions(+), 10 deletions(-)

diff --git a/.github/workflows/wheel.yml b/.github/workflows/wheel.yml
index 50157223..d97de1dd 100644
--- a/.github/workflows/wheel.yml
+++ b/.github/workflows/wheel.yml
@@ -9,17 +9,12 @@ jobs:
   build_wheels:
     strategy:
       matrix:
-        os: ["ubuntu-latest", "windows-latest", "macos-latest"]
+        # macos-13 is for intel
+        os: ["ubuntu-24.04", "ubuntu-24.04-arm", "windows-latest", "macos-13", "macos-latest"]
     runs-on: ${{ matrix.os }}
     name: Build wheels on ${{ matrix.os }}
 
     steps:
-      - name: Set up QEMU
-        if: runner.os == 'Linux'
-        uses: docker/setup-qemu-action@v3
-        with:
-          platforms: all
-
       - uses: actions/checkout@v4
       - uses: actions/setup-python@v5
         with:
@@ -32,12 +27,10 @@ jobs:
           make cython
 
       - name: Build
-        uses: pypa/cibuildwheel@v2.20.0
+        uses: pypa/cibuildwheel@v2.23.3
         env:
           CIBW_TEST_REQUIRES: "pytest"
           CIBW_TEST_COMMAND: "pytest {package}/test"
-          CIBW_ARCHS_LINUX: auto aarch64
-          CIBW_ARCHS_MACOS: x86_64 universal2 arm64
           CIBW_SKIP: "pp* cp38-macosx_*"
 
       - name: Build sdist

From fe9e620a607702b31476f092ad01a387cff4cfbd Mon Sep 17 00:00:00 2001
From: Inada Naoki <songofacandy@gmail.com>
Date: Mon, 2 Jun 2025 14:46:53 +0900
Subject: [PATCH 04/15] upload to PyPI on create a release (#639)

---
 .github/workflows/wheel.yml | 48 ++++++++++++++++++++++++++++++++++---
 1 file changed, 45 insertions(+), 3 deletions(-)

diff --git a/.github/workflows/wheel.yml b/.github/workflows/wheel.yml
index d97de1dd..686d7dd0 100644
--- a/.github/workflows/wheel.yml
+++ b/.github/workflows/wheel.yml
@@ -1,8 +1,10 @@
-name: Build Wheels
+name: Build sdist and Wheels
 on:
   push:
     branches: [main]
-  create:
+  release:
+    types:
+      - published
   workflow_dispatch:
 
 jobs:
@@ -34,7 +36,7 @@ jobs:
           CIBW_SKIP: "pp* cp38-macosx_*"
 
       - name: Build sdist
-        if: runner.os == 'Linux'
+        if: runner.os == 'Linux' && runner.arch == 'X64'
         run: |
           pip install build
           python -m build -s -o wheelhouse
@@ -44,3 +46,43 @@ jobs:
         with:
           name: wheels-${{ matrix.os }}
           path: wheelhouse
+
+  # combine all wheels into one artifact
+  combine_wheels:
+    needs: [build_wheels]
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/download-artifact@v4
+        with:
+          # unpacks all CIBW artifacts into dist/
+          pattern: wheels-*
+          path: dist
+          merge-multiple: true
+
+      - name: Upload Wheels to artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: wheels-all
+          path: dist
+
+  # https://github.com/pypa/cibuildwheel/blob/main/examples/github-deploy.yml
+  upload_pypi:
+    needs: [build_wheels]
+    runs-on: ubuntu-latest
+    environment: pypi
+    permissions:
+      id-token: write
+    if: github.event_name == 'release' && github.event.action == 'published'
+    # or, alternatively, upload to PyPI on every tag starting with 'v' (remove on: release above to use this)
+    # if: github.event_name == 'push' && startsWith(github.ref, 'refs/tags/v')
+    steps:
+      - uses: actions/download-artifact@v4
+        with:
+          # unpacks all CIBW artifacts into dist/
+          pattern: wheels-*
+          path: dist
+          merge-multiple: true
+
+      - uses: pypa/gh-action-pypi-publish@release/v1
+        #with:
+        # To test: repository-url: https://test.pypi.org/legacy/

From e6445d3b922ca0b9bc82695dd9d1c1529763095a Mon Sep 17 00:00:00 2001
From: Inada Naoki <songofacandy@gmail.com>
Date: Fri, 6 Jun 2025 09:38:38 +0900
Subject: [PATCH 05/15] v1.1.1rc1

---
 ChangeLog.rst       | 7 +++++++
 docs/conf.py        | 6 +++---
 msgpack/__init__.py | 4 ++--
 3 files changed, 12 insertions(+), 5 deletions(-)

diff --git a/ChangeLog.rst b/ChangeLog.rst
index 863c6b2c..0f67502c 100644
--- a/ChangeLog.rst
+++ b/ChangeLog.rst
@@ -1,3 +1,10 @@
+1.1.1rc1
+========
+
+Release Date: 2025-06-06
+
+* Update Cython to 3.1.1 and cibuildwheel to 2.23.3.
+
 1.1.0
 =====
 
diff --git a/docs/conf.py b/docs/conf.py
index ab0ad3c8..28116cd6 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -12,9 +12,9 @@
 # If extensions (or modules to document with autodoc) are in another directory,
 # add these directories to sys.path here. If the directory is relative to the
 # documentation root, use os.path.abspath to make it absolute, like shown here.
-#import os
-#import sys
-#sys.path.insert(0, os.path.abspath('..'))
+# import os
+# import sys
+# sys.path.insert(0, os.path.abspath('..'))
 
 # -- General configuration -----------------------------------------------------
 
diff --git a/msgpack/__init__.py b/msgpack/__init__.py
index b6151054..b8d83da8 100644
--- a/msgpack/__init__.py
+++ b/msgpack/__init__.py
@@ -4,8 +4,8 @@
 from .exceptions import *  # noqa: F403
 from .ext import ExtType, Timestamp
 
-version = (1, 1, 0)
-__version__ = "1.1.0"
+version = (1, 1, 1, "rc1")
+__version__ = "1.1.1rc1"
 
 
 if os.environ.get("MSGPACK_PUREPYTHON"):

From 42f056f3cfaf2e3ec220db2f864e7613d433ad48 Mon Sep 17 00:00:00 2001
From: Inada Naoki <songofacandy@gmail.com>
Date: Fri, 13 Jun 2025 15:41:08 +0900
Subject: [PATCH 06/15] v1.1.1

---
 ChangeLog.rst       | 7 +++++++
 msgpack/__init__.py | 4 ++--
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/ChangeLog.rst b/ChangeLog.rst
index 0f67502c..418c444c 100644
--- a/ChangeLog.rst
+++ b/ChangeLog.rst
@@ -1,3 +1,10 @@
+1.1.1
+=====
+
+Release Date: 2025-06-13
+
+* No change from 1.1.1rc1.
+
 1.1.1rc1
 ========
 
diff --git a/msgpack/__init__.py b/msgpack/__init__.py
index b8d83da8..ad68271d 100644
--- a/msgpack/__init__.py
+++ b/msgpack/__init__.py
@@ -4,8 +4,8 @@
 from .exceptions import *  # noqa: F403
 from .ext import ExtType, Timestamp
 
-version = (1, 1, 1, "rc1")
-__version__ = "1.1.1rc1"
+version = (1, 1, 1)
+__version__ = "1.1.1"
 
 
 if os.environ.get("MSGPACK_PUREPYTHON"):

From d9873dab049c60d5fd553223b9be10f1dcb56929 Mon Sep 17 00:00:00 2001
From: Inada Naoki <songofacandy@gmail.com>
Date: Sat, 26 Jul 2025 10:59:05 +0900
Subject: [PATCH 07/15] ci: update cibuildwheel and drop Python 3.8 (#642)

---
 .github/workflows/test.yml  | 2 +-
 .github/workflows/wheel.yml | 4 ++--
 requirements.txt            | 2 +-
 3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 23d221c8..60894797 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -10,7 +10,7 @@ jobs:
     strategy:
       matrix:
         os: ["ubuntu-latest", "windows-latest", "macos-latest"]
-        py: ["3.14-dev", "3.13", "3.12", "3.11", "3.10", "3.9", "3.8"]
+        py: ["3.14-dev", "3.13", "3.12", "3.11", "3.10", "3.9"]
 
     runs-on: ${{ matrix.os }}
     name: Run test with Python ${{ matrix.py }} on ${{ matrix.os }}
diff --git a/.github/workflows/wheel.yml b/.github/workflows/wheel.yml
index 686d7dd0..12600363 100644
--- a/.github/workflows/wheel.yml
+++ b/.github/workflows/wheel.yml
@@ -29,11 +29,11 @@ jobs:
           make cython
 
       - name: Build
-        uses: pypa/cibuildwheel@v2.23.3
+        uses: pypa/cibuildwheel@v3.1.1
         env:
           CIBW_TEST_REQUIRES: "pytest"
           CIBW_TEST_COMMAND: "pytest {package}/test"
-          CIBW_SKIP: "pp* cp38-macosx_*"
+          CIBW_SKIP: "pp* cp38-*"
 
       - name: Build sdist
         if: runner.os == 'Linux' && runner.arch == 'X64'
diff --git a/requirements.txt b/requirements.txt
index 78a2f38f..5d2e20b1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1 +1 @@
-Cython~=3.1.1
+Cython~=3.1.2

From c2a9f1fda5401de2193c43d7a4f93bfc0b2fc1e6 Mon Sep 17 00:00:00 2001
From: MS-GITS <137760120+Greenie0701@users.noreply.github.com>
Date: Fri, 26 Sep 2025 09:47:17 +0530
Subject: [PATCH 08/15] ci: add support for building windows on arm wheels
 (#643)

---
 .github/workflows/test.yml  | 12 ++++++++----
 .github/workflows/wheel.yml |  4 ++--
 2 files changed, 10 insertions(+), 6 deletions(-)

diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 60894797..26b4ce68 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -9,9 +9,13 @@ jobs:
   test:
     strategy:
       matrix:
-        os: ["ubuntu-latest", "windows-latest", "macos-latest"]
+        os: ["ubuntu-latest", "windows-latest", "windows-11-arm", "macos-latest"]
         py: ["3.14-dev", "3.13", "3.12", "3.11", "3.10", "3.9"]
-
+        exclude:
+          - os: windows-11-arm
+            py: "3.9"
+          - os: windows-11-arm
+            py: "3.10"
     runs-on: ${{ matrix.os }}
     name: Run test with Python ${{ matrix.py }} on ${{ matrix.os }}
 
@@ -29,8 +33,8 @@ jobs:
       - name: Prepare
         shell: bash
         run: |
-          pip install -U pip
-          pip install -r requirements.txt pytest
+          python -m pip install -U pip
+          python -m pip install -r requirements.txt pytest
 
       - name: Build
         shell: bash
diff --git a/.github/workflows/wheel.yml b/.github/workflows/wheel.yml
index 12600363..fb369a13 100644
--- a/.github/workflows/wheel.yml
+++ b/.github/workflows/wheel.yml
@@ -12,7 +12,7 @@ jobs:
     strategy:
       matrix:
         # macos-13 is for intel
-        os: ["ubuntu-24.04", "ubuntu-24.04-arm", "windows-latest", "macos-13", "macos-latest"]
+        os: ["ubuntu-24.04", "ubuntu-24.04-arm", "windows-latest", "windows-11-arm", "macos-13", "macos-latest"]
     runs-on: ${{ matrix.os }}
     name: Build wheels on ${{ matrix.os }}
 
@@ -33,7 +33,7 @@ jobs:
         env:
           CIBW_TEST_REQUIRES: "pytest"
           CIBW_TEST_COMMAND: "pytest {package}/test"
-          CIBW_SKIP: "pp* cp38-*"
+          CIBW_SKIP: "pp* cp38-* cp39-win_arm64 cp310-win_arm64"
 
       - name: Build sdist
         if: runner.os == 'Linux' && runner.arch == 'X64'

From 0f3c4be465b5f39ab2d6903797e57ef8a0fd097e Mon Sep 17 00:00:00 2001
From: TW <tw@waldmann-edv.de>
Date: Wed, 8 Oct 2025 09:10:46 +0200
Subject: [PATCH 09/15] README: fix typos and grammar (#648)

---
 README.md | 64 +++++++++++++++++++++++++++----------------------------
 1 file changed, 32 insertions(+), 32 deletions(-)

diff --git a/README.md b/README.md
index 61a03c60..1f063242 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,7 @@
 [![Build Status](https://github.com/msgpack/msgpack-python/actions/workflows/wheel.yml/badge.svg)](https://github.com/msgpack/msgpack-python/actions/workflows/wheel.yml)
 [![Documentation Status](https://readthedocs.org/projects/msgpack-python/badge/?version=latest)](https://msgpack-python.readthedocs.io/en/latest/?badge=latest)
 
-## What's this
+## What is this?
 
 [MessagePack](https://msgpack.org/) is an efficient binary serialization format.
 It lets you exchange data among multiple languages like JSON.
@@ -25,9 +25,9 @@ But msgpack provides a pure Python implementation (`msgpack.fallback`) for PyPy.
 
 ### Windows
 
-When you can't use a binary distribution, you need to install Visual Studio
-or Windows SDK on Windows.
-Without extension, using pure Python implementation on CPython runs slowly.
+If you can't use a binary distribution, you need to install Visual Studio
+or the Windows SDK on Windows.
+Without the extension, the pure Python implementation on CPython runs slowly.
 
 
 ## How to use
@@ -35,11 +35,11 @@ Without extension, using pure Python implementation on CPython runs slowly.
 ### One-shot pack & unpack
 
 Use `packb` for packing and `unpackb` for unpacking.
-msgpack provides `dumps` and `loads` as an alias for compatibility with
+msgpack provides `dumps` and `loads` as aliases for compatibility with
 `json` and `pickle`.
 
-`pack` and `dump` packs to a file-like object.
-`unpack` and `load` unpacks from a file-like object.
+`pack` and `dump` pack to a file-like object.
+`unpack` and `load` unpack from a file-like object.
 
 ```pycon
 >>> import msgpack
@@ -73,7 +73,7 @@ for unpacked in unpacker:
 ```
 
 
-### Packing/unpacking of custom data type
+### Packing/unpacking of custom data types
 
 It is also possible to pack/unpack custom data types. Here is an example for
 `datetime.datetime`.
@@ -140,8 +140,8 @@ True
 ### Advanced unpacking control
 
 As an alternative to iteration, `Unpacker` objects provide `unpack`,
-`skip`, `read_array_header` and `read_map_header` methods. The former two
-read an entire message from the stream, respectively de-serialising and returning
+`skip`, `read_array_header`, and `read_map_header` methods. The former two
+read an entire message from the stream, respectively deserializing and returning
 the result, or ignoring it. The latter two methods return the number of elements
 in the upcoming container, so that each element in an array, or key-value pair
 in a map, can be unpacked or skipped individually.
@@ -149,7 +149,7 @@ in a map, can be unpacked or skipped individually.
 
 ## Notes
 
-### string and binary type in old msgpack spec
+### String and binary types in the old MessagePack spec
 
 Early versions of msgpack didn't distinguish string and binary types.
 The type for representing both string and binary types was named **raw**.
@@ -167,7 +167,7 @@ and `raw=True` options.
 
 ### ext type
 
-To use the **ext** type, pass `msgpack.ExtType` object to packer.
+To use the **ext** type, pass a `msgpack.ExtType` object to the packer.
 
 ```pycon
 >>> import msgpack
@@ -181,26 +181,26 @@ You can use it with `default` and `ext_hook`. See below.
 
 ### Security
 
-To unpacking data received from unreliable source, msgpack provides
+When unpacking data received from an unreliable source, msgpack provides
 two security options.
 
 `max_buffer_size` (default: `100*1024*1024`) limits the internal buffer size.
-It is used to limit the preallocated list size too.
+It is also used to limit preallocated list sizes.
 
 `strict_map_key` (default: `True`) limits the type of map keys to bytes and str.
-While msgpack spec doesn't limit the types of the map keys,
-there is a risk of the hashdos.
+While the MessagePack spec doesn't limit map key types,
+there is a risk of a hash DoS.
 If you need to support other types for map keys, use `strict_map_key=False`.
 
 
 ### Performance tips
 
-CPython's GC starts when growing allocated object.
-This means unpacking may cause useless GC.
-You can use `gc.disable()` when unpacking large message.
+CPython's GC starts when the number of allocated objects grows.
+This means unpacking may trigger unnecessary GC.
+You can use `gc.disable()` when unpacking a large message.
 
-List is the default sequence type of Python.
-But tuple is lighter than list.
+A list is the default sequence type in Python.
+However, a tuple is lighter than a list.
 You can use `use_list=False` while unpacking when performance is important.
 
 
@@ -208,7 +208,7 @@ You can use `use_list=False` while unpacking when performance is important.
 
 ### msgpack 0.5
 
-Package name on PyPI was changed from `msgpack-python` to `msgpack` from 0.5.
+The package name on PyPI was changed from `msgpack-python` to `msgpack` in 0.5.
 
 When upgrading from msgpack-0.4 or earlier, do `pip uninstall msgpack-python` before
 `pip install -U msgpack`.
@@ -218,25 +218,25 @@ When upgrading from msgpack-0.4 or earlier, do `pip uninstall msgpack-python` be
 
 * Python 2 support
 
-  * The extension module does not support Python 2 anymore.
+  * The extension module no longer supports Python 2.
     The pure Python implementation (`msgpack.fallback`) is used for Python 2.
   
   * msgpack 1.0.6 drops official support of Python 2.7, as pip and
-    GitHub Action (setup-python) no longer support Python 2.7.
+    GitHub Action "setup-python" no longer supports Python 2.7.
 
 * Packer
 
   * Packer uses `use_bin_type=True` by default.
-    Bytes are encoded in bin type in msgpack.
-  * The `encoding` option is removed.  UTF-8 is used always.
+    Bytes are encoded in the bin type in MessagePack.
+  * The `encoding` option is removed. UTF-8 is always used.
 
 * Unpacker
 
-  * Unpacker uses `raw=False` by default.  It assumes str types are valid UTF-8 string
-    and decode them to Python str (unicode) object.
+  * Unpacker uses `raw=False` by default. It assumes str values are valid UTF-8 strings
+    and decodes them to Python str (Unicode) objects.
   * `encoding` option is removed.  You can use `raw=True` to support old format (e.g. unpack into bytes, not str).
-  * Default value of `max_buffer_size` is changed from 0 to 100 MiB to avoid DoS attack.
+  * The default value of `max_buffer_size` is changed from 0 to 100 MiB to avoid DoS attacks.
     You need to pass `max_buffer_size=0` if you have large but safe data.
-  * Default value of `strict_map_key` is changed to True to avoid hashdos.
-    You need to pass `strict_map_key=False` if you have data which contain map keys
-    which type is not bytes or str.
+  * The default value of `strict_map_key` is changed to True to avoid hash DoS.
+    You need to pass `strict_map_key=False` if you have data that contain map keys
+    whose type is neither bytes nor str.

From 19b5d33ded09d5a563a677c1a3d75b6246181259 Mon Sep 17 00:00:00 2001
From: Inada Naoki <songofacandy@gmail.com>
Date: Wed, 8 Oct 2025 17:56:20 +0900
Subject: [PATCH 10/15] release v1.1.2 (#649)

---
 .github/workflows/wheel.yml |  2 +-
 ChangeLog.rst               | 13 +++++++++++++
 msgpack/__init__.py         |  4 ++--
 pyproject.toml              | 18 ++++--------------
 requirements.txt            |  2 +-
 test/test_buffer.py         |  4 ++--
 6 files changed, 23 insertions(+), 20 deletions(-)

diff --git a/.github/workflows/wheel.yml b/.github/workflows/wheel.yml
index fb369a13..fca321af 100644
--- a/.github/workflows/wheel.yml
+++ b/.github/workflows/wheel.yml
@@ -29,7 +29,7 @@ jobs:
           make cython
 
       - name: Build
-        uses: pypa/cibuildwheel@v3.1.1
+        uses: pypa/cibuildwheel@v3.2.0
         env:
           CIBW_TEST_REQUIRES: "pytest"
           CIBW_TEST_COMMAND: "pytest {package}/test"
diff --git a/ChangeLog.rst b/ChangeLog.rst
index 418c444c..beeab15c 100644
--- a/ChangeLog.rst
+++ b/ChangeLog.rst
@@ -1,3 +1,16 @@
+1.1.2
+=====
+
+Release Date: 2025-10-08
+
+This release does not change source code. It updates only building wheels:
+
+* Update Cython to v3.1.4
+* Update cibuildwheel to v3.2.0
+* Drop Python 3.8
+* Add Python 3.14
+* Add windows-arm
+
 1.1.1
 =====
 
diff --git a/msgpack/__init__.py b/msgpack/__init__.py
index ad68271d..f3266b70 100644
--- a/msgpack/__init__.py
+++ b/msgpack/__init__.py
@@ -4,8 +4,8 @@
 from .exceptions import *  # noqa: F403
 from .ext import ExtType, Timestamp
 
-version = (1, 1, 1)
-__version__ = "1.1.1"
+version = (1, 1, 2)
+__version__ = "1.1.2"
 
 
 if os.environ.get("MSGPACK_PUREPYTHON"):
diff --git a/pyproject.toml b/pyproject.toml
index b1628322..3976adc7 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,31 +1,21 @@
 [build-system]
-# 75.3.0 is the latest version supporting Python 3.8
-requires = ["setuptools >= 75.3.0"]
+requires = ["setuptools >= 80.9.0"]
 build-backend = "setuptools.build_meta"
 
 [project]
 name = "msgpack"
 dynamic = ["version"]
-# `license = "Apache-2.0"` is preferred. But keep old syntax for Python 3.8 compatibility.
-# https://github.com/msgpack/msgpack-python/pull/637
-license = {text="Apache 2.0"}
+license = "Apache-2.0"
 authors = [{name="Inada Naoki", email="songofacandy@gmail.com"}]
 description = "MessagePack serializer"
 readme = "README.md"
 keywords = ["msgpack", "messagepack", "serializer", "serialization", "binary"]
-requires-python = ">=3.8"
+requires-python = ">=3.9"
 classifiers = [
     "Development Status :: 5 - Production/Stable",
     "Operating System :: OS Independent",
     "Topic :: File Formats",
     "Intended Audience :: Developers",
-    "Programming Language :: Python :: 3.8",
-    "Programming Language :: Python :: 3.9",
-    "Programming Language :: Python :: 3.10",
-    "Programming Language :: Python :: 3.11",
-    "Programming Language :: Python :: 3.12",
-    "Programming Language :: Python :: 3.13",
-    "Programming Language :: Python :: 3.14",
     "Programming Language :: Python :: Implementation :: CPython",
     "Programming Language :: Python :: Implementation :: PyPy",
 ]
@@ -46,7 +36,7 @@ version = {attr = "msgpack.__version__"}
 
 [tool.ruff]
 line-length = 100
-target-version = "py38"
+target-version = "py39"
 lint.select = [
     "E", # pycodestyle
     "F", # Pyflakes
diff --git a/requirements.txt b/requirements.txt
index 5d2e20b1..b544ccac 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1 +1 @@
-Cython~=3.1.2
+Cython==3.1.4
diff --git a/test/test_buffer.py b/test/test_buffer.py
index 2c5a14c5..ca097222 100644
--- a/test/test_buffer.py
+++ b/test/test_buffer.py
@@ -17,7 +17,7 @@ def test_unpack_bytearray():
     obj = unpackb(buf, use_list=1)
     assert [b"foo", b"bar"] == obj
     expected_type = bytes
-    assert all(type(s) == expected_type for s in obj)
+    assert all(type(s) is expected_type for s in obj)
 
 
 def test_unpack_memoryview():
@@ -26,7 +26,7 @@ def test_unpack_memoryview():
     obj = unpackb(view, use_list=1)
     assert [b"foo", b"bar"] == obj
     expected_type = bytes
-    assert all(type(s) == expected_type for s in obj)
+    assert all(type(s) is expected_type for s in obj)
 
 
 def test_packer_getbuffer():

From ef4f83df16e552e8c8fb12ceac55f5fda9f7f340 Mon Sep 17 00:00:00 2001
From: Inada Naoki <songofacandy@gmail.com>
Date: Thu, 9 Oct 2025 13:00:46 +0900
Subject: [PATCH 11/15] relax setuptools version (#652)

---
 .github/workflows/test.yml | 4 +---
 MANIFEST.in                | 2 +-
 pyproject.toml             | 2 +-
 requirements.txt           | 2 ++
 4 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 26b4ce68..74c311cb 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -33,7 +33,6 @@ jobs:
       - name: Prepare
         shell: bash
         run: |
-          python -m pip install -U pip
           python -m pip install -r requirements.txt pytest
 
       - name: Build
@@ -55,8 +54,7 @@ jobs:
       - name: build packages
         shell: bash
         run: |
-          pip install build
-          python -m build
+          python -m build -nv
 
       - name: upload packages
         uses: actions/upload-artifact@v4
diff --git a/MANIFEST.in b/MANIFEST.in
index 57d84a4c..6317706e 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1,5 +1,5 @@
 include setup.py
 include COPYING
 include README.md
-recursive-include msgpack *.h *.c *.pyx *.cpp
+recursive-include msgpack *.h *.c *.pyx
 recursive-include test *.py
diff --git a/pyproject.toml b/pyproject.toml
index 3976adc7..3633d6b6 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,5 +1,5 @@
 [build-system]
-requires = ["setuptools >= 80.9.0"]
+requires = ["setuptools >= 77.0.3"]
 build-backend = "setuptools.build_meta"
 
 [project]
diff --git a/requirements.txt b/requirements.txt
index b544ccac..f8f83709 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1 +1,3 @@
 Cython==3.1.4
+setuptools==77.0.3
+build

From c2546eabc414b6f232d41b7d9e51b9ff9fa93296 Mon Sep 17 00:00:00 2001
From: Inada Naoki <songofacandy@gmail.com>
Date: Thu, 9 Oct 2025 15:28:01 +0900
Subject: [PATCH 12/15] update setuptools requirements to >=78.1.1 (#653)

https://github.com/advisories/GHSA-5rjg-fvgr-3xxf
---
 pyproject.toml   | 2 +-
 requirements.txt | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/pyproject.toml b/pyproject.toml
index 3633d6b6..a4c2172a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,5 +1,5 @@
 [build-system]
-requires = ["setuptools >= 77.0.3"]
+requires = ["setuptools >= 78.1.1"]
 build-backend = "setuptools.build_meta"
 
 [project]
diff --git a/requirements.txt b/requirements.txt
index f8f83709..2f1c55b2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,3 @@
 Cython==3.1.4
-setuptools==77.0.3
+setuptools==78.1.1
 build

From af456409709f58add777090bdbe6a4696879e49d Mon Sep 17 00:00:00 2001
From: Inada Naoki <songofacandy@gmail.com>
Date: Thu, 9 Oct 2025 15:53:08 +0900
Subject: [PATCH 13/15] cython: freethreading_compatible (#654)

```
$ v3/bin/python -VV
Python 3.14.0 free-threading build (main, Oct  7 2025, 15:35:12) [Clang 20.1.4 ]

$ v3/bin/python -c 'import sys,msgpack; print(sys._is_gil_enabled())'
False
```
---
 .github/workflows/test.yml |  2 +-
 msgpack/_cmsgpack.pyx      |  3 ++-
 msgpack/_packer.pyx        | 10 ++++++++--
 msgpack/_unpacker.pyx      | 11 +++++++++--
 4 files changed, 20 insertions(+), 6 deletions(-)

diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 74c311cb..20410fe9 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -10,7 +10,7 @@ jobs:
     strategy:
       matrix:
         os: ["ubuntu-latest", "windows-latest", "windows-11-arm", "macos-latest"]
-        py: ["3.14-dev", "3.13", "3.12", "3.11", "3.10", "3.9"]
+        py: ["3.14", "3.14t", "3.13", "3.12", "3.11", "3.10", "3.9"]
         exclude:
           - os: windows-11-arm
             py: "3.9"
diff --git a/msgpack/_cmsgpack.pyx b/msgpack/_cmsgpack.pyx
index 1faaac3a..9680b31e 100644
--- a/msgpack/_cmsgpack.pyx
+++ b/msgpack/_cmsgpack.pyx
@@ -1,5 +1,6 @@
-# coding: utf-8
 #cython: embedsignature=True, c_string_encoding=ascii, language_level=3
+#cython: freethreading_compatible = True
+import cython
 from cpython.datetime cimport import_datetime, datetime_new
 import_datetime()
 
diff --git a/msgpack/_packer.pyx b/msgpack/_packer.pyx
index 402b6946..94d1462c 100644
--- a/msgpack/_packer.pyx
+++ b/msgpack/_packer.pyx
@@ -1,5 +1,3 @@
-# coding: utf-8
-
 from cpython cimport *
 from cpython.bytearray cimport PyByteArray_Check, PyByteArray_CheckExact
 from cpython.datetime cimport (
@@ -129,6 +127,7 @@ cdef class Packer:
         if self.exports > 0:
             raise BufferError("Existing exports of data: Packer cannot be changed")
 
+    @cython.critical_section
     def __init__(self, *, default=None,
                  bint use_single_float=False, bint autoreset=True, bint use_bin_type=True,
                  bint strict_types=False, bint datetime=False, unicode_errors=None,
@@ -269,6 +268,7 @@ cdef class Packer:
                 return ret
         return self._pack_inner(o, 0, nest_limit)
 
+    @cython.critical_section
     def pack(self, object obj):
         cdef int ret
         self._check_exports()
@@ -284,6 +284,7 @@ cdef class Packer:
             self.pk.length = 0
             return buf
 
+    @cython.critical_section
     def pack_ext_type(self, typecode, data):
         self._check_exports()
         if len(data) > ITEM_LIMIT:
@@ -291,6 +292,7 @@ cdef class Packer:
         msgpack_pack_ext(&self.pk, typecode, len(data))
         msgpack_pack_raw_body(&self.pk, data, len(data))
 
+    @cython.critical_section
     def pack_array_header(self, long long size):
         self._check_exports()
         if size > ITEM_LIMIT:
@@ -301,6 +303,7 @@ cdef class Packer:
             self.pk.length = 0
             return buf
 
+    @cython.critical_section
     def pack_map_header(self, long long size):
         self._check_exports()
         if size > ITEM_LIMIT:
@@ -311,6 +314,7 @@ cdef class Packer:
             self.pk.length = 0
             return buf
 
+    @cython.critical_section
     def pack_map_pairs(self, object pairs):
         """
         Pack *pairs* as msgpack map type.
@@ -331,6 +335,7 @@ cdef class Packer:
             self.pk.length = 0
             return buf
 
+    @cython.critical_section
     def reset(self):
         """Reset internal buffer.
 
@@ -339,6 +344,7 @@ cdef class Packer:
         self._check_exports()
         self.pk.length = 0
 
+    @cython.critical_section
     def bytes(self):
         """Return internal buffer contents as bytes object"""
         return PyBytes_FromStringAndSize(self.pk.buf, self.pk.length)
diff --git a/msgpack/_unpacker.pyx b/msgpack/_unpacker.pyx
index 34ff3304..f0cf96d7 100644
--- a/msgpack/_unpacker.pyx
+++ b/msgpack/_unpacker.pyx
@@ -1,5 +1,3 @@
-# coding: utf-8
-
 from cpython cimport *
 cdef extern from "Python.h":
     ctypedef struct PyObject
@@ -324,6 +322,7 @@ cdef class Unpacker:
         PyMem_Free(self.buf)
         self.buf = NULL
 
+    @cython.critical_section
     def __init__(self, file_like=None, *, Py_ssize_t read_size=0,
                  bint use_list=True, bint raw=False, int timestamp=0, bint strict_map_key=True,
                  object object_hook=None, object object_pairs_hook=None, object list_hook=None,
@@ -384,6 +383,7 @@ cdef class Unpacker:
                  max_str_len, max_bin_len, max_array_len,
                  max_map_len, max_ext_len)
 
+    @cython.critical_section
     def feed(self, object next_bytes):
         """Append `next_bytes` to internal buffer."""
         cdef Py_buffer pybuff
@@ -484,6 +484,7 @@ cdef class Unpacker:
             else:
                 raise ValueError("Unpack failed: error = %d" % (ret,))
 
+    @cython.critical_section
     def read_bytes(self, Py_ssize_t nbytes):
         """Read a specified number of raw bytes from the stream"""
         cdef Py_ssize_t nread
@@ -496,6 +497,7 @@ cdef class Unpacker:
         self.stream_offset += nread
         return ret
 
+    @cython.critical_section
     def unpack(self):
         """Unpack one object
 
@@ -503,6 +505,7 @@ cdef class Unpacker:
         """
         return self._unpack(unpack_construct)
 
+    @cython.critical_section
     def skip(self):
         """Read and ignore one object, returning None
 
@@ -510,6 +513,7 @@ cdef class Unpacker:
         """
         return self._unpack(unpack_skip)
 
+    @cython.critical_section
     def read_array_header(self):
         """assuming the next object is an array, return its size n, such that
         the next n unpack() calls will iterate over its contents.
@@ -518,6 +522,7 @@ cdef class Unpacker:
         """
         return self._unpack(read_array_header)
 
+    @cython.critical_section
     def read_map_header(self):
         """assuming the next object is a map, return its size n, such that the
         next n * 2 unpack() calls will iterate over its key-value pairs.
@@ -526,6 +531,7 @@ cdef class Unpacker:
         """
         return self._unpack(read_map_header)
 
+    @cython.critical_section
     def tell(self):
         """Returns the current position of the Unpacker in bytes, i.e., the
         number of bytes that were read from the input, also the starting
@@ -536,6 +542,7 @@ cdef class Unpacker:
     def __iter__(self):
         return self
 
+    @cython.critical_section
     def __next__(self):
         return self._unpack(unpack_construct, 1)
 

From c1ecd23dbfaa6c6f2a408e7e5c4727c6bdce7608 Mon Sep 17 00:00:00 2001
From: Inada Naoki <songofacandy@gmail.com>
Date: Thu, 9 Oct 2025 18:33:23 +0900
Subject: [PATCH 14/15] drop Python 3.9 (#656)

---
 .github/workflows/test.yml  | 8 +++-----
 .github/workflows/wheel.yml | 6 +++---
 pyproject.toml              | 4 ++--
 3 files changed, 8 insertions(+), 10 deletions(-)

diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 20410fe9..6b1664ae 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -10,10 +10,8 @@ jobs:
     strategy:
       matrix:
         os: ["ubuntu-latest", "windows-latest", "windows-11-arm", "macos-latest"]
-        py: ["3.14", "3.14t", "3.13", "3.12", "3.11", "3.10", "3.9"]
+        py: ["3.14", "3.14t", "3.13", "3.12", "3.11", "3.10"]
         exclude:
-          - os: windows-11-arm
-            py: "3.9"
           - os: windows-11-arm
             py: "3.10"
     runs-on: ${{ matrix.os }}
@@ -21,10 +19,10 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Set up Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: ${{ matrix.py }}
           allow-prereleases: true
diff --git a/.github/workflows/wheel.yml b/.github/workflows/wheel.yml
index fca321af..be54e5e1 100644
--- a/.github/workflows/wheel.yml
+++ b/.github/workflows/wheel.yml
@@ -17,8 +17,8 @@ jobs:
     name: Build wheels on ${{ matrix.os }}
 
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-python@v5
+      - uses: actions/checkout@v5
+      - uses: actions/setup-python@v6
         with:
           python-version: "3.x"
           cache: "pip"
@@ -33,7 +33,7 @@ jobs:
         env:
           CIBW_TEST_REQUIRES: "pytest"
           CIBW_TEST_COMMAND: "pytest {package}/test"
-          CIBW_SKIP: "pp* cp38-* cp39-win_arm64 cp310-win_arm64"
+          CIBW_SKIP: "pp* cp38-* cp39-* cp310-win_arm64"
 
       - name: Build sdist
         if: runner.os == 'Linux' && runner.arch == 'X64'
diff --git a/pyproject.toml b/pyproject.toml
index a4c2172a..c69d5a7c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -10,7 +10,7 @@ authors = [{name="Inada Naoki", email="songofacandy@gmail.com"}]
 description = "MessagePack serializer"
 readme = "README.md"
 keywords = ["msgpack", "messagepack", "serializer", "serialization", "binary"]
-requires-python = ">=3.9"
+requires-python = ">=3.10"
 classifiers = [
     "Development Status :: 5 - Production/Stable",
     "Operating System :: OS Independent",
@@ -36,7 +36,7 @@ version = {attr = "msgpack.__version__"}
 
 [tool.ruff]
 line-length = 100
-target-version = "py39"
+target-version = "py310"
 lint.select = [
     "E", # pycodestyle
     "F", # Pyflakes

From f9806368ae302722f095ea884436b20ed1cddf33 Mon Sep 17 00:00:00 2001
From: Inada Naoki <songofacandy@gmail.com>
Date: Mon, 1 Dec 2025 14:16:03 +0900
Subject: [PATCH 15/15] update cython and cibuildwheel (#658)

---
 .github/workflows/wheel.yml | 4 ++--
 requirements.txt            | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/.github/workflows/wheel.yml b/.github/workflows/wheel.yml
index be54e5e1..531abbc3 100644
--- a/.github/workflows/wheel.yml
+++ b/.github/workflows/wheel.yml
@@ -17,7 +17,7 @@ jobs:
     name: Build wheels on ${{ matrix.os }}
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: actions/setup-python@v6
         with:
           python-version: "3.x"
@@ -29,7 +29,7 @@ jobs:
           make cython
 
       - name: Build
-        uses: pypa/cibuildwheel@v3.2.0
+        uses: pypa/cibuildwheel@v3.3.0
         env:
           CIBW_TEST_REQUIRES: "pytest"
           CIBW_TEST_COMMAND: "pytest {package}/test"
diff --git a/requirements.txt b/requirements.txt
index 2f1c55b2..9e4643b6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,3 @@
-Cython==3.1.4
+Cython==3.2.1
 setuptools==78.1.1
 build