Summary

• raise the Python wrapper support floor from 3.9 to 3.10 across package metadata, CI, and docs
• add explicit support coverage for the latest stable CPython line, Python 3.14 (Python 3.14.5 as of May 22, 2026)
• remove the Python 3.9-only urllib3 resolver constraint now that urllib3 2.7 drops 3.9
• refresh the uv lock for the new support window and adopt Python 3.10 union syntax required by Ruff at the new target

Validation

• uv lock --check
• uv sync --python 3.14 --extra dev
• uv run python --version # Python 3.14.5
• uv run ruff check src/
• uv run ruff format --check src/
• uv run mypy src/promptfoo/
• uv run pyright src/promptfoo/
• uv run pytest tests/ -v -m "not smoke"
• uv run pytest tests/smoke/ -v
• uv build