feat: support Python 3.15

.github/workflows/build.yaml

@@ -24,7 +24,7 @@ jobs:
         with:
           submodules: recursive
 
-      - uses: astral-sh/setup-uv@bec219d24cd3e171d82865faccec33120bb574f4 # v10.1.0
+      - uses: astral-sh/setup-uv@c18668ad3cf93ea998bef934396af7bb5c839dc7 # v10.2.0
         with:
           version: latest-known
           python-version: "3.14"
@@ -61,7 +61,7 @@ jobs:
         with:
           submodules: recursive
 
-      - uses: pypa/cibuildwheel@v4.2.0
+      - uses: pypa/cibuildwheel@v4.3.0
 
       - uses: actions/upload-artifact@v7
         with:
@@ -80,7 +80,7 @@ jobs:
     permissions:
       id-token: write
     steps:
-      - uses: actions/download-artifact@v7
+      - uses: actions/download-artifact@v8
         with:
           pattern: "*"
           path: dist

.github/workflows/test.yml

@@ -41,14 +41,14 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest]
-        python-version: ["3.11", "3.12", "3.13", "3.14", "3.14t"]
+        python-version: ["3.11", "3.12", "3.13", "3.14", "3.14t", "3.15", "3.15t"]
 
     steps:
       - uses: actions/checkout@v7
         with:
           submodules: recursive
 
-      - uses: astral-sh/setup-uv@bec219d24cd3e171d82865faccec33120bb574f4 # v10.1.0
+      - uses: astral-sh/setup-uv@c18668ad3cf93ea998bef934396af7bb5c839dc7 # v10.2.0
         with:
           version: latest-known
           python-version: ${{ matrix.python-version }}
@@ -75,7 +75,7 @@ jobs:
         with:
           submodules: recursive
 
-      - uses: astral-sh/setup-uv@bec219d24cd3e171d82865faccec33120bb574f4 # v10.1.0
+      - uses: astral-sh/setup-uv@c18668ad3cf93ea998bef934396af7bb5c839dc7 # v10.2.0
         with:
           version: latest-known
           python-version: "3.14"

CHANGES.md

@@ -1,5 +1,10 @@
 # CHANGES
 
+## Unreleased
+
+- Support Python 3.15, including the free-threaded CPython 3.15 build, with
+  tests and wheels for Linux, macOS, and Windows
+
 ## 2.3.0 (2026-09-16)
 
 - Support free-threaded CPython 3.14 without re-enabling the GIL, including

README.md

@@ -11,8 +11,9 @@ cChardet is a high-speed universal character encoding detector built on the
 
 ## Python support
 
-cChardet supports CPython 3.11 through 3.14, including the free-threaded
-CPython 3.14 build. Each version is tested on Linux, macOS, and Windows.
+cChardet supports CPython 3.11 through 3.15, including the free-threaded
+CPython 3.14 and 3.15 builds. Each version is tested on Linux, macOS, and
+Windows.
 
 ## Development
 

pyproject.toml

@@ -15,6 +15,7 @@ classifiers = [
     'Programming Language :: Python :: 3.12',
     'Programming Language :: Python :: 3.13',
     'Programming Language :: Python :: 3.14',
+    'Programming Language :: Python :: 3.15',
 ]
 requires-python = ">=3.11"
 dynamic = ["version"]
@@ -33,13 +34,13 @@ version = { attr = "cchardet.__version__" }
 dev = [
     "build>=1.6.1",
     "chardet>=7.6.0",
-    "charset-normalizer>=3.5.1",
-    "cython>=3.2.9,<3.4",
-    "mypy>=1.15",
+    "charset-normalizer>=3.5.2",
+    "cython>=3.3.0,<3.4",
+    "mypy>=2.4.0",
     "pyperf>=2.10.0",
     "pytest>=9.1.1",
-    "ruff>=0.16.7",
-    "setuptools>=77",
+    "ruff>=0.16.10",
+    "setuptools>=84.0.0",
     "twine>=7.0.0",
 ]
 
@@ -66,7 +67,7 @@ format.quote-style = "double"
 format.indent-style = "space"
 
 [tool.cibuildwheel]
-build = "cp311-* cp312-* cp313-* cp314-* cp314t-*"
+build = "cp311-* cp312-* cp313-* cp314-* cp314t-* cp315-* cp315t-*"
 skip = "*-musllinux_*"
 archs = "auto"
 test-command = "python tools/wheel_smoke.py"