Fence stale ACK results by generation, make duplicate MarkProcessed harmless after confirmed ACK, and cover forged delivery, mutation, in-flight ACK, initial subscribe, and replacement edge cases.
Co-authored-by: Cursor <cursoragent@cursor.com>
Provide a standalone agent client for l-ai-chat with service-token auth, safe at-least-once subscriptions, ordered cumulative ACK tracking, and self-contained gRPC fake tests.
Co-authored-by: Cursor <cursoragent@cursor.com>
