Test and declare Python 3.13 and 3.14

.github/workflows/ci.yml

@@ -16,7 +16,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.11", "3.12"]
+        python-version: ["3.11", "3.12", "3.13", "3.14"]
 
     # SPEC-v0.6 §4. The Postgres tests skip when CTRLRUN_TEST_POSTGRES is unset, and a
     # skipping test proves nothing -- so CI supplies a real server rather than letting the

.github/workflows/codeql.yml

@@ -6,7 +6,7 @@ name: CodeQL
 # the extra queries cost a few minutes that a project this size can afford.
 #
 # Findings land in the repository's code-scanning tab. Nothing here gates a merge -- the
-# required checks stay `check (3.11)`, `check (3.12)` and `package` -- because a static
+# required checks stay `check (3.11)` through `check (3.14)` and `package` -- because a static
 # analyser's first run on an unfamiliar codebase is a reading list, not a verdict.
 
 on:

CHANGELOG.md

@@ -7,6 +7,23 @@ All notable changes to this project are documented here. The format follows
 Public API names are frozen in `docs/SPEC-v0.1.md` §8. Before 1.0 they may still change, and
 any change to one appears here.
 
+## [Unreleased]
+
+### Added
+
+- **Python 3.13 and 3.14 are tested and declared.** CI's `check` job runs the full suite on
+  3.11, 3.12, 3.13 and 3.14, and the package classifiers name all four. The floor is unchanged:
+  `requires-python` stays `>=3.11`, and mypy and ruff still check against 3.11. No library code
+  changed; the one test fix is below.
+
+### Fixed
+
+- **The migration tests' release fixtures could not build a venv on some interpreters.**
+  `venv.create` copies the interpreter by default, and a copied binary from a shared-libpython
+  build (uv's CPython 3.14 on macOS) aborted inside `ensurepip`, so all five release fixtures
+  errored before a release was installed. The fixture now symlinks, as `python -m venv` does on
+  POSIX.
+
 ## [0.6.1] - 2026-09-07 — The audit's fixes, and the gateway's transport
 
 Everything found after `v0.6.0` was tagged: twenty-nine defects from an audit of the shipped

pyproject.toml

@@ -39,6 +39,8 @@ classifiers = [
     "Intended Audience :: Developers",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.13",
+    "Programming Language :: Python :: 3.14",
     "Typing :: Typed",
 ]
 dependencies = [

tests/test_migrations.py

@@ -68,7 +68,11 @@ def _release_venv(tmp_path_factory, version: str) -> Path | None:
     """
     root = tmp_path_factory.mktemp(f"rel-{version}")
     env = root / "venv"
-    venv.create(env, with_pip=True)
+    # Symlinks, as `python -m venv` uses on POSIX. `venv.create` copies the interpreter by
+    # default, and a copied binary from a shared-libpython build looks for `libpython` beside
+    # itself: on uv's CPython 3.14 for macOS it aborted inside `ensurepip`, and every release
+    # fixture errored before a release was installed.
+    venv.create(env, with_pip=True, symlinks=os.name != "nt")
     python = env / "bin" / "python"
     done = subprocess.run(
         [str(python), "-m", "pip", "install", "-q", f"ctrlrun=={version}"],