feat: add support for Python 3.15 in CI and project configuration (#3827)

* feat: add support for Python 3.15 in CI and project configuration

Signed-off-by: Frost Ming <me@frostming.com>

* chore: clean up lockfile and project configuration by removing unused metadata

Signed-off-by: Frost Ming <me@frostming.com>

* feat: add Python 3.15 preview version to the CI matrix

Signed-off-by: Frost Ming <me@frostming.com>

Author: frostming

.github/workflows/ci.yml

@@ -32,7 +32,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.10", 3.11, 3.12, 3.13, 3.14]
+        python-version: ["3.10", 3.11, 3.12, 3.13, 3.14, 3.15]
         os: [ubuntu-latest, windows-latest, macos-latest]
         install-via: [pip]
         include:
@@ -54,19 +54,8 @@ jobs:
             3.12
             3.13
             3.14
+            3.15
           allow-prereleases: true
-        if: matrix.os != 'macos-latest'
-      - name: Setup Python Versions
-        uses: actions/setup-python@v6
-        with:
-          python-version: |
-            3.10
-            3.11
-            3.12
-            3.13
-            3.14
-          allow-prereleases: true
-        if: matrix.os == 'macos-latest'
       - name: Setup Python ${{ matrix.python-version }}
         uses: actions/setup-python@v6
         with:

.github/workflows/claude.yml

@@ -0,0 +1 @@
+Add Python 3.15 preview version to the CI matrix.

news/3827.misc.md

@@ -3,7 +3,7 @@
 
 from pdm.utils import cd
 
-DEFAULT_PYTHON_VERSIONS = ["3.9", "3.10", "3.11", "3.12", "3.13", "3.14"]
+DEFAULT_PYTHON_VERSIONS = ["3.9", "3.10", "3.11", "3.12", "3.13", "3.14", "3.15"]
 PYPROJECT = {
     "project": {"name": "test-project", "version": "0.1.0", "requires-python": ">=3.7"},
     "build-system": {"requires": ["pdm-backend"], "build-backend": "pdm.backend"},