Which window-chrome affordances to render (ADR 0006 D7). The kit fires INTENT callbacks only — geometry (collapsing an iframe, resizing a panel) is entirely the host's.
Optional
The ⋮ display-mode menu: true → all three modes, an array picks and orders a subset.
true
Which window-chrome affordances to render (ADR 0006 D7). The kit fires INTENT callbacks only — geometry (collapsing an iframe, resizing a panel) is entirely the host's.