Step-level regression tracing for agent CI
Add a step-level failure graph to agent CI runs. The immediate user is the team already shipping multi-step agents with tool calls, where a failed end-to-end check still leaves an engineer digging through traces by hand. AgentEval gives a concrete template: score planning, tool selection, parameter generation, execution, and synthesis separately, then trace downstream failures back through dependencies. In the reported pilot, this cut median root-cause identification time from 4.2 hours to 22 minutes and caught 23 pre-release regressions over four months. A cheap first version does not need the full taxonomy. Start with one workflow, log each step and its parent steps, add typed pass/fail checks for the most common failure points, and surface the lowest-scoring upstream step when a run breaks. If that view shortens triage for one recurring failure class, the workflow is worth expanding.