Module rerank 

Optional second-stage re-scoring of a fused recall pool (bring your own cross-encoder/LLM). Never wired in by default — see rerank::Reranker. Optional second-stage re-scoring of a MemoryService::recall_fused candidate pool, the layer that lifts a ranking miss (a relevant fact deep in the pool, below the fusion cutoff) into the final k — the lever validated on the LoCoMo ceiling diagnostic (multi-hop recall@8 = 50%, recall@64 = 89%: the gold fact is IN the pool, just outranked).

Mirroring the crate::embedder/crate::extract pattern, the plug-point is dependency-free (bring your own cross-encoder or LLM by implementing Reranker) and never wired in by default: a reranker measurably helps ranking-bound corpora but can hurt on out-of-distribution conversational queries (the LoCoMo panel’s own finding) — opt-in only, never a silent default.

Enums

RerankError

Failure produced by a Reranker backend (e.g. a network-backed model that cannot be reached, or output that cannot be mapped back to candidates).

Traits

Reranker

Re-scores or reorders a fused candidate pool against query.

Type Aliases

DynReranker

A boxed, object-safe reranker. Lets a non-generic caller (e.g. the Node binding, wrapping a JS callback) hold Box<dyn Reranker + Send + Sync> without threading a generic parameter through MemoryService.