MessageProvider/useThread/useMessages over the kernel-client socket (live append,
typing, dedupe). Reconnect test (re-opens active thread). Rewrote import-boundary
as an allowlist so SDK<->service sibling imports are forbidden both ways. 28 tests.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
MessageSocket (open/send/read/typing via emitWithAck, reconnect re-opens thread,
no socket.io types leak) + RestClient (ingest/getThreadMessages/sendMessage).
tsup ESM+dts. Facade unit test with injectable fake socket (3 tests).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
maaz519