The search service can hold several Milvus collections, each with its own
embedder, but a search names one or gets the default, so a second collection
was invisible to the assistant. The client now learns the list off the query
path (at warm-up and on the session timer), and only when the service lists
more than the default does a search fan out — one call per collection in
parallel, fused by reciprocal rank so scores from different embedders are
never compared. With one collection, today's case, the request is byte-for-
byte what it was and no listing call is made while anyone waits.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_016fZGJNyDvERbMgS2Uc2msP
