We Benchmarked Our AI Memory SDK. Is the Industry Standard Test Broken?

A three-part story about retrieval engineering, grounding truth, and what 93% accuracy actually costs. 66.9% accuracy. Zero cloud calls. Under one millisecond. Part 1: The Benchmark that confuses… Six weeks ago I sat down to run VEKTOR Slipstream through the LoCoMo benchmark. LoCoMo is the standard test for long-term conversational memory in AI systems. Ten multi-session conversations, 1,986 questions, categories covering single-hop recall, multi-hop reasoning, temporal queries, adversarial questions, and commonsense inference. Every serious memory system paper cites it. Mem0 cites it.