Module metrics 

Module: Metrics

Runtime observability counters for AgentRuntime. All global counters use atomics for lock-free, thread-safe increment/read. Per-tool counters use a Mutex<HashMap> to avoid requiring a concurrent map dependency.

Structs

LatencyHistogram

A simple fixed-bucket latency histogram.

MetricsSnapshot

A point-in-time snapshot of all runtime counters.

RuntimeMetrics

Shared runtime metrics. Clone the Arc to share across threads.