Agent Skills: evals-ops

Build and run evals for LLM and agent systems: golden datasets, LLM-as-a-judge with bias control, trajectory/step/outcome scoring, adversarial refuters, and CI regression gates. Triggers on: eval, evals, eval harness, golden dataset, golden set, LLM-as-a-judge, judge rubric, judge bias, judge calibration, Cohen kappa, agreement with human labels, pass@k, pass^k, trajectory eval, step-level eval, tool-call accuracy, regression gate, eval CI, blocking vs advisory eval, faithfulness score, DeepEval, Braintrust, Opik, Langfuse, AgentOps, did my prompt change make it worse, is my agent getting better.