Rescore

Rescore #

rescore re-ranks the top window of hits with a second query — an expensive precision pass (phrase, vector similarity, a narrow filter match) applied only where it can change the final page, instead of to every matching document.

POST /my-collection/_search

How it works #

Rescore is engine-native. When a request carries a rescore block, the collector widens its gather to max(from + size, window) candidates, the first-pass query ranks them, and the store layer then applies the rescore to the collected set (apply_rescore_to_result in lib/engine/src/store/layered/generic_reader.rs, blending in lib/engine/src/search/scorer/mod.rs):