One engineer wants to revert the reranker upgrade entir...

The accuracy drop is a positional artifact of context depth rather than a failure of the reranker’s quality. Reverting the reranker would discard a genuine improvement in recall@k. Instead, truncate the context depth to mitigate the positional issue and verify the fix by breaking down performance by position decile. Reverting should only be considered if truncation fails to recover the baseline or if the reranker’s latency is the primary blocker for the release.