okf migrate
usage: okf migrate [-h] [--apply] [--json] [target]
migrate frontmatter to OKF 0.2: `timestamp` to `generated` (git), `status` per D37 (dry-rundefault)
positional arguments: target <bundle> or <bundle>/<subdir> (default: whole catalogue)
options: -h, --help show this help message and exit --apply write the previewed changes (default: dry-run preview only) --json print one JSON envelope {command, ok, data, warnings, error}