Two-Lane Retrieval and Audit Logging for Fintech Knowledge Bots

The article argues that a fintech engineering knowledge bot should pair durable vector retrieval over reviewed documentation with live retrieval reserved for rapidly changing information, and keep both traceable. It recommends routing each question by its freshness requirements, and treating a live result as supplementary rather than a replacement for an approved source. A hybrid answer must record which lane supplied each sentence, and the bot should report unverified status instead of inventing a merge when live data is unavailable. The author stresses audit logs that capture who asked, which corpus was eligible, what was returned, why chunks were selected, and what citations were passed to the model, using separate events and content hashes. Such logs should be append-only, access-restricted, and redacted to avoid storing sensitive customer data.