Staged, Observable Retrieval for Insurance Claims Assistants with Node.js

An insurance claims intake assistant should treat retrieval as a bounded, observable pipeline rather than a single vector search call. The application should define a retrieval contract covering the document unit returned, mandatory metadata filters, index freshness, and citation context, kept behind an adapter so the vector vendor can be swapped. Effective alerting should flag a rising rate of answers lacking citable sources, since that often signals trouble earlier than a generic server error. Each retrieval attempt should emit a trace with a request ID, collection, filter hash, deadline, source identifiers, and an explicit outcome such as ok, empty, stale, or deadline_exceeded, without logging full claim documents. Latency budgets and stage limits should be written into the contract, with the system returning fewer cited results or declining to answer rather than silently widening queries.