What this week is
You have built a capable agent. This week you make it legible — because an agent you cannot debug is an agent you cannot ship.
Full request tracing shows you every model call, every tool call, and every token. Cost and latency observability turns "it feels slow" into a number. And an eval suite built for your own agent catches regressions before your users do.
Then reliability: retries that are not infinite, self-healing that is not magical, and failure modes that degrade instead of collapsing.
The walkthrough
Each part adds one capability to the same growing codebase, and each is a runnable checkpoint.
- 01TracingEvery model call, tool call and token, recorded and inspectable.
- 02ObservabilityCost and latency as first-class metrics, not afterthoughts.
- 03The eval suiteRegression tests for your own agent, run before every change.
- 04ReliabilityBounded retries, graceful degradation, and honest failure.
After this week you can
- Trace an agent end to end and find why it did what it did
- Measure cost and latency continuously
- Catch regressions with an eval suite you own