Version 0.2.1 behavior is documented here. Thesupport record separates local verification frompublished MoonX behavior; moonx examples use registry releases.
Remove the final path component. Multiple operands and NUL-delimited outputwith -z are supported. Empty operands produce ., root remains /, andrepeated separators are handled without filesystem access.
Standalone --version prints exactly dirname 0.2.1 followed by onenewline. Standalone --help starts with Usage: dirname, lists bothmetadata options, and ends with a newline. Both write to stdout, leave stdinunread, and exit with status 0. Exact-version publication and verificationremain recorded separately in the support record.