The requirements-*.txt files pin development tools that run on one Python version only. Tools needed by tests across the supported Python matrix remain in the root dev dependency group so the same environment can be exercised on every version.

• requirements-quality.txt contains Ruff.
• requirements-typing.txt contains the type checkers used by code-quality jobs.
• requirements-api-compatibility.txt contains the isolated Griffe pin used when checking untrusted pull-request source.
• The tool-runtime, tool-hooks, and tool-markdown dependency groups in pyproject.toml centrally pin tools that Poe or repository hooks can select directly by group.

Run contributor tasks through the cross-version Poe dependency:

uv run poe check

Single-version commands add the relevant bundle:

uv run --locked --with-requirements tooling/requirements-typing.txt pyright
uv run --group tool-hooks prek run -a

Use uv run poe upgrade-dev-dependency-pins to refresh exact pins in these files together with development dependency groups.