out_ property
Out is the glob of files run produced, relative to the repo root; matching nothing FAILS the build rather than publishing an empty entry. It expands unquoted, so it is bounded to path and glob characters. The Go lane names its own files and ignores this.
Please note: This property should have been non-nullable! Since the specification file does not include a default value (using the "default:" property), however, the generated source code must fall back to having a nullable type. Consider adding a "default:" property in the specification file to hide this note.
Implementation
String? out_;