A useful agent trace is not a list of timestamps. It is a causal tree. When a TypeScript agent retrieves documents in parallel, calls a model, retries a tool, and falls back to cached data, each operation needs a trace ID, its own span ID, and the correct parent span.
Source: [Dev.to](https://dev.to/raju_dandigam/building-typescript-native-observability-async-context-and-execution-flow-9f7)