fix: cap Python test matrix at 3.13 and align dev tooling versions

The uv test matrix tested Python 3.14, but the dependency tree can't build
on 3.14 (watchfiles 0.24.0 / pyo3 0.22.2 maxes at 3.13), so every release's
CI broke on the 3.14 leg. Cap the matrix at 3.12-3.13 (the actually-supported
range; the adk needs >=3.12), drop the 3.14 classifier, and align tooling:
publish + devcontainer uv -> 0.10.2 (match CI), devcontainer Python 3.9 -> 3.12.

requires-python is intentionally left at the template default here; raising
its floor to >=3.12 breaks Stainless's codegen build env, so that stays a
per-release patch on the generated release branch.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: max-parke-scale

.devcontainer/Dockerfile

@@ -1,8 +1,8 @@
-ARG VARIANT="3.9"
+ARG VARIANT="3.12"
 FROM mcr.microsoft.com/vscode/devcontainers/python:0-${VARIANT}
 
 USER vscode
 
-COPY --from=ghcr.io/astral-sh/uv:latest /uv /uvx /bin/
+COPY --from=ghcr.io/astral-sh/uv:0.10.2 /uv /uvx /bin/
 
 RUN echo "[[ -d .venv ]] && source .venv/bin/activate || export PATH=\$PATH" >> /home/vscode/.bashrc

.github/workflows/publish-pypi.yml

@@ -19,7 +19,7 @@ jobs:
       - name: Install uv
         uses: astral-sh/setup-uv@d4b2f3b6ecc6e67c4457f6d3e41ec42d3d0fcb86 # v5.4.2
         with:
-          version: '0.9.13'
+          version: '0.10.2'
 
       - name: Publish to PyPI
         run: |

pyproject.toml

@@ -55,7 +55,6 @@ classifiers = [
   "Programming Language :: Python :: 3.11",
   "Programming Language :: Python :: 3.12",
   "Programming Language :: Python :: 3.13",
-  "Programming Language :: Python :: 3.14",
   "Operating System :: OS Independent",
   "Operating System :: POSIX",
   "Operating System :: MacOS",

scripts/test

@@ -10,8 +10,8 @@ export DEFER_PYDANTIC_BUILD=false
 
 # Note that we need to specify the patch version here so that uv
 # won't use unstable (alpha, beta, rc) releases for the tests
-PY_VERSION_MIN=">=3.9.0"
-PY_VERSION_MAX=">=3.14.0"
+PY_VERSION_MIN=">=3.12.0,<3.13"
+PY_VERSION_MAX=">=3.13.0,<3.14"
 
 function run_tests() {
     echo "==> Running tests with Pydantic v2"