Formatting rules

Formatting rules (0.41.0)

lute fmt <path>… canonicalizes source without changing its meaning. It is deterministic and idempotent. --check writes nothing: exit 0 means canonical, 1 means a selected file would change, and 2 means I/O, UTF-8, or parse failure.

Formatting applies to .lute documents and Lute-owned project, schema, and configured plugin YAML inputs. It normalizes trivia such as indentation, spacing, line endings, delimiters, and source layout while preserving comments, authored strings, line IDs, semantic ordering, and values.

YAML values are opaque: the formatter does not reserialize arbitrary YAML or rewrite values. Symlinks are skipped. Formatting is not validation or compilation; use lute check or lute check --project DIR for diagnostics.