Day 7 — FAISS empty vectors, metric mismatch, and recall collapse (ProblemMap No.8)
tl;dr Ingestion success does not prove retrieval health. If your neighbors look the same for unrelated queries, check for zero vectors and NaNs, confirm metric policy matches the index, rebuild Continue reading Day 7 — FAISS empty vectors, metric mismatch, and recall collapse (ProblemMap No.8)
