The invocation key — e.g. 'sync:push', 'codegen', 'migrate'.
OptionaldescriptionFuller prose, shown only in mj <domain> usage.
Groups commands in mj usage — e.g. 'sync', 'codegen', 'migrate'.
OptionalexamplesCopy-pasteable invocations.
OptionalflagsOne line, shown in the mj usage domain map. Keep it terse.
Per-plugin usage + runtime metadata. Drives the progressive-disclosure
mj usage(tier 1) andmj <domain> usage(tier 2) surface and the timeout advisory (plan §5). Co-located with the plugin so it can never drift from the actual flags.