In projects configured for Ruff (ruff.toml, .ruff.toml, or pyproject.toml with a [tool.ruff] table), ruff server runs next to basedpyright as a managed pip tool: its lint diagnostics, Reformat Code / format on save, Optimize Imports and Code Cleanup's fix-all. It is listed after the type checkers, so hover, navigation and rename stay with them; projects without a Ruff configuration never start or install it. Root markers accept file#table to require a TOML table, and a hand-defined server named ruff now only overrides how the built-in one launches. Verified with the real-servers end-to-end test against ruff and basedpyright.
Co-authored-by: andreabasile <7715018+andreabasile@users.noreply.github.com>