FA-99452 / Vector retrieval ranking / Member archive

Vector retrieval: Retrieval channel weights disappear during fusion · case 02

Retrieval channel weights disappear during fusion.

Member previewVariant 2 · 3 implementations · 6 checks per implementation

Case contract

Lists contain unique IDs in ranked order and have one corresponding positive integer weight each. Offset is a positive integer. Sum weight/(offset+one-based rank); missing IDs contribute zero. Return IDs by descending exact Fraction total then ID.

Why this case matters

An offline vector retrieval toy model isolates one ranking contract from embedding generation, storage, and serving.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
trusted channel weight	`["x", "a", "b"]`	`["a", "x", "b"]`	Failed

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