Linting

There are two types of linting diagnostics: Lint errors (each of which corresponds to a rule) and syntax errors. The latter is not reported by default, as it is expected that the same errors are already reported by the IDE.

Command line mode

In Command line mode, the executable is invoked after every keystroke.

This is equivalent to running ruff check --no-fix with the file as input.

LSP modes

In LSP modes, diagnostics are sent to the client via textDocument/publishDiagnostics notifications.