Your Vector Store Rejects the Embedder Change That Barely Matters and Cannot See the One That Destroys Retrieval
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The provider ships v2, or somebody changes the tokenizer. The index is still there, still returning five results, still with plausible scores. Change the width and the vector is the wrong shape, so a typed index refuses it outright — and even with that check removed, precision@5 only falls from 0.9…
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- 2026-09-08 08:30 · DEV Community — AI
Your Vector Store Rejects the Embedder Change That Barely Matters and Cannot See the One That Destroys Retrieval