Free; no engine run. For a ranking already produced by hs_rank_topk (pass its ranking_ref), return a PORTABLE BRIEF you can drop straight into your own agent's context - the whole analysis as one compact artifact instead of three separate calls. Returns: provenance (engine version, core hash, the ranking_ref, the analysis identity, and when the analysis was computed), outcome.label, trust (top-decile lift, calibration error, validation scheme, and any columns the leak guard quarantined), driver_group (the drivers the engine found, each with a direction, to be read as ONE combination), and limits. Best for: handing an analysis to another agent, filing an analysis in your own store so you can recognise the same analysis later, or building a domain expert on top of Hunter-Seeker - we supply the governed prediction, you supply the domain. Set format to "markdown" for prose instead of JSON; both carry identical numbers. It reuses the analysis behind the ranking_ref, so it costs nothing and can be called as often as you like - only hs_rank_topk consumes a run. Drivers are ASSOCIATIONS, not causes, and are only meaningful together: never re-order them, never rank one above another, never report one on its own. Common mistakes: passing a ranking_ref older than an hour (the analysis is cached for one hour, then you must re-run hs_rank_topk); treating a null statistic as zero - null means the engine did not report it; and inventing drivers when the brief returns an empty driver group, which is a real result and not a gap. Never restate a number this brief does not contain, and never compute change over time by comparing two briefs - that is you authoring a direction the engine never gave. If change over time matters, re-run.
Connector
