Reports packages declared in dependency files (for example, requirements.txt or the [project].dependencies section of pyproject.toml) that are either not installed or out-of-date in the active interpreter.

Quick fixes are offered to install or update the affected package, and to install or update every flagged package at once.

Other dependency-bearing TOML sections — [build-system], [project.optional-dependencies], [dependency-groups], and [tool.uv.dev-dependencies] / [tool.hatch.envs.*] — are intentionally ignored, since their entries may legitimately not be installed in the active interpreter.