The original ModelSelector returns as the conversation.input.model seat
occupant (the named single slot the composer bar renders before its primary
button), alongside — not instead of — the /model popup. Both entries are
projections of ONE per-session directory owned by the new ModelService
(ctx.models): the same session.models load, the same selectModel submit,
the same host-reported current — a switch in either entry is what the
other shows next, asserted both ways in the plugin spec.
Trigger chrome follows figma 313:14108's composer ToggleButton (13/20
medium secondary label, 4px gap, caption chevron, 28px chip height
matching the sibling Plan/Read-only selects); the menu keeps the original
upward provider-grouped single-select with keyboard navigation. The
seat honors the owner locked bit as its disabled state.
Yichen Jiang
imccyu