#sed

Version 0.2.0 behavior is documented here. The support record separates local verification from published MoonX behavior; moonx examples use registry releases.

Edit byte-oriented text streams with p, d, q, =, and substitution s/REGEXP/REPLACEMENT/. Hold-space commands h/H/g/G/x, labels and branches :/b/t/T, nested addressed groups, and n/N/P/D/a/i/c are available. Read stdin when no input file is given or an operand is -. Multiple input files share line numbering, address ranges and the last-line address $.

moonx cli/sed 's/old/new/g' file.txt
moonx cli/sed -n '2,5p' file.txt
moonx cli/sed -E 's/([0-9]+)/[\1]/g' file.txt

-n/--quiet/--silent suppresses automatic output. Use repeated -e/--expression and -f/--file options to combine scripts in order. -E or -r selects extended regular expressions; basic expressions are the default. A first-line #n comment also disables automatic output.

Addresses accept positive line numbers, $, /REGEXP/, two-address ranges and ! inversion. Substitution supports &, replacement captures \1 through \9, g, a positive occurrence number, and p. An empty expression reuses the last executed regular expression. Unterminated input records retain their missing final newline; later output inserts the required record separator.

Pattern and hold spaces retain their final-newline state. Branches use the last definition of a label; t/T consume substitution success, and a new input read resets it. D restarts without reading. Appended text is deferred to the input cycle boundary; inserted text is immediate. Multiple files share these states. Scripts compile before input is opened, including label and group resolution.

The shared C-byte BRE/ERE matcher supports pattern backreferences, byte classes and word assertions. Repeated nullable captures follow the tested GNU candidate and capture-register selection, including counted repeats and references. See the workspace support record. In-place editing and locale-aware matching remain outside this profile. Unsupported syntax is rejected before input is processed. --help and --version are available. Exit status is 0 on success, 1 for an invalid script or evaluation error, 2 for an unreadable input file, and 4 for a missing branch label. Diagnostics follow the project's format rather than GNU's script-position wording. Pattern/hold growth and branch termination are controlled by the script; no hidden execution-step limit is imposed.

#Standalone metadata

Standalone --version prints exactly sed 0.2.0 followed by one newline. Standalone --help starts with Usage: sed, lists both metadata options, and ends with a newline. Both write to stdout, leave stdin unread, and exit with status 0. Exact-version publication and verification remain recorded separately in the support record.