Latency Critical Systems guides an agent through engineering and optimizing latency-sensitive architectures such as realtime dashboards, market data pipelines, streaming agents, queues, and caches. It structures the evaluation process by splitting metrics into granular latency percentiles, throughput, and freshness age, mapping out hot paths, and applying a systematic optimization order. Reach for it when you need to analyze hot paths, track performance bottlenecks, and verify deployed surfaces without compromising validation or data freshness.