chats.create input. seedText only prefills the composer draft — the
human Send in host chrome remains the trust boundary; nothing auto-sends.
open: true additionally reveals the new session in the bound pane, so
create-and-open closes the id loop in one call.
chats.createinput.seedTextonly prefills the composer draft — the human Send in host chrome remains the trust boundary; nothing auto-sends.open: trueadditionally reveals the new session in the bound pane, so create-and-open closes the id loop in one call.