If you persist embeddings, you must persist the embedder. A vector index is only meaningful next to the exact model that produced it. It's an easy mistake because everything looks fine — the vectors are right there on disk, the search runs, no error is thrown. It's only wrong by a dimension you can't see. The fix The embedder now travels inside the single cartridge file — same one-file, binary-only format, no sidecar. On load it's restored, and every read (and every...