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The per-command options lived only in main.rs's doc header, so a packaged binary had no way to show them. They move into a USAGE constant (one copy, no drift) that `--help`, `-h`, `help` and `<command> --help` print to stdout, exiting 0. No command prints the usage to stderr and fails; an unknown command is named and points to --help. Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>