A run of small quality fixes across the family.

The Studio-to-Watch publish handshake now allowlists the content types it accepts on the way in (safer for a wire that stays scoped narrowly), and every product that lands on Watch keeps a persistent external reference back to the source production, so future syncs know exactly what they are updating.

Over on Books by Voysey, the preflight tray now advances to the edition picker the moment the LLM finishes its last question, instead of waiting a beat that could feel like a stall.

And the Instant model tier no longer sends a zero thinking budget in a rare edge case that could produce a crash on the model side. It floors the value to a safe minimum instead.