fix: align CI Python versions with PyO3 support

.github/workflows/ci.yml

@@ -24,7 +24,6 @@ jobs:
           - "3.11"
           - "3.12"
           - "3.13"
-          - "3.14"
 
     steps:
       - name: Check out repository

pyproject.toml

@@ -19,7 +19,6 @@ classifiers = [
     "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 :: Rust",
     "Topic :: Scientific/Engineering :: Mathematics",

tests/test_project_metadata.py

@@ -0,0 +1,30 @@
+from __future__ import annotations
+
+import re
+import tomllib
+from pathlib import Path
+
+
+ROOT = Path(__file__).resolve().parents[1]
+
+
+def pyproject_python_versions() -> list[str]:
+    data = tomllib.loads((ROOT / "pyproject.toml").read_text())
+    classifiers = data["project"]["classifiers"]
+    return sorted(
+        match.group(1)
+        for classifier in classifiers
+        if (match := re.fullmatch(r"Programming Language :: Python :: (3\.\d+)", classifier))
+    )
+
+
+def workflow_python_versions() -> list[str]:
+    workflow = (ROOT / ".github/workflows/ci.yml").read_text()
+    return sorted(set(re.findall(r'- "(3\.\d+)"', workflow)))
+
+
+def test_python_version_support_matches_current_bindings() -> None:
+    expected = ["3.10", "3.11", "3.12", "3.13"]
+
+    assert pyproject_python_versions() == expected
+    assert workflow_python_versions() == expected