execSync blocks the event loop for the whole command, freezing every clack
ticker in the process — skill steps ran with a dead spinner while earlier
wizard phases (async spawn) animated fine. Spawn + promise keeps the loop
free; the engine's exec seam already awaits. The failure shape is unchanged:
`exit <code>: <first stderr line>` first, full stderr below.
Also retitles operator notes "Do this" -> "Your turn".
Koshkoshinsk
ee1d2773c2