The CarPlay & AirPlay protocol, up close.
Notes from the team building CarCast — a protocol inspector for CarPlay and AirPlay. What we see on the wire, written down for the people building in the same corner.
New in iOS 26 · protocol
Video on the Dash
iOS 26 quietly opened video on the CarPlay screen. Here's the shape of the
problem on the wire — why it isn't screen mirroring, the single videoPlayback
gate in /info, and how a URL fling actually flows.
More notes in the pipe — DRM key courier, the /info capability surface, wireless CarPlay. Check back.