0-2-1-understand-rrf-fusion-score

name	0.2.1-understand-rrf_fusion_score
description	[0.2.1] The sum of reciprocal rank values for a given document across all contributing rank lists; the document's posi

understand-rrf_fusion_score

CALL NUMBER: deep_dense_retrieval.rrf_fusion_score DEFINITION: The sum of reciprocal rank values for a given document across all contributing rank lists; the document's position in the fused ranking is determined by descending fusion score.

Invoke this skill to understand rrf_fusion_score down to its primitives. The RELATIVE ROOT below is the least-fixed-point closure of everything it bundles from — the full import cone, grouped by the lib each prim comes from. Projected from a prover-typed KB (MAP/SWI-Prolog consistency gate): every reference below resolves.

THE RELATIVE ROOT (the import cone, by lib)

from deep_dense_retrieval

• rrf_final_ranking (d1): The merged document list produced by sorting all candidates in descending order by their fusion scores, yielding a unified cross-system ranking that reflects all input retrieval evidence

CONSUMERS (what needs this)

rrf_document_candidate, rrf_fusion_score, rrf_reciprocal_rank_score, rrf_weighted_rrf

---

Projected from the retrieval augmented generation architecture patterns KB (207 concepts / 225 relations) — consistency-typed by MAP; the facet list after the colon IS the cross-lib dependency web.

(leaf — this is an actual skill.)