Version 0.1.2 behavior is documented here. Thesupport record separates local verification frompublished MoonX behavior; moonx examples use registry releases.
-s/--separator selects a fixed separator and -b/--before placesseparators before records. Standard input or one file is accepted. The-r/--regex form and multiple input files are not implemented and arerejected. These are command implementation gaps; multiple-file reading isavailable, and a byte-oriented matcher can be implemented in MoonBit.
Standalone --version prints exactly tac 0.1.2 followed by onenewline. Standalone --help starts with Usage: tac, 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.