Version 0.2.1 behavior is documented here. Thesupport record separates local verification frompublished MoonX behavior; moonx examples use registry releases.
Compute SHA-256 digests for binary input and verify standard checksum fileswith -c. Supports stdin, multiple files, binary/text compatibility flags,and NUL-delimited output with -z. Verification supports quiet/status-onlyoutput, malformed-record warnings, strict parsing, and ignored missing files.-b emits the binary * marker and -t the text-space marker; the last onewins. With --ignore-missing, at least one listed file must still be verified.
With no file operand, the command silently reads stdin until EOF, matching theupstream terminal, pipe, redirection, and explicit - behavior.
Standalone --version prints exactly sha256sum 0.2.1 followed by onenewline. Standalone --help starts with Usage: sha256sum, 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.