The mission planner command list is currently available only for arducopter manual.
The mission planner manual also does not have a link to it. Also links to the same from arduplane and rover should be added. Even if commands specific to rover and plane aren’t documented at this time, probably we could start with giving a link to arducopter command list with a warning.
I agree it would be useful to have either a similar document for each of the platforms OR update the common document to cover all the cases. Anyone have any strong thoughts on the best approach?