Use this skill when the user asks for causal diagnosis of Spring/JVM latency, throughput, saturation, memory, GC, threads, pools, databases, messaging, or containers from runtime measurements and controlled experiments. Use it to rank hypotheses and confirm bottlenecks from JFR, metrics, traces, profiles, logs, or workload evidence. Without runtime artifacts, return a measurement plan; do not claim a bottleneck from static configuration alone.
