Plain
Hairline border, no fill — the canvas itself, framed.
Raised
Raised fill, for when it sits on the canvas and has to read as a plane.
Sunken
For machine output: code, logs, structured content.
Publish the task skills?
This writes into .agents/skills and records the setup. Nothing else is touched.
OVERLAY --surface-overlay · MODAL CENTRED, MAX 560 PX · NO SHADOW UNDER IT