Announce this SDK's version to the host (§6). Sends sdk-handshake eagerly
(best-effort — the host may already be listening) AND replies to a host
request-handshake (the robust path, mirroring the other request-* pulls).
Idempotent; safe to call more than once. Returns an unsubscribe fn.
Announce this SDK's version to the host (§6). Sends
sdk-handshakeeagerly (best-effort — the host may already be listening) AND replies to a hostrequest-handshake(the robust path, mirroring the otherrequest-*pulls). Idempotent; safe to call more than once. Returns an unsubscribe fn.