qa-llm-evaluation

LLM and prompt evaluation: 7 skills (deepeval-evaluation, giskard-llm, langfuse-tracing, llm-regression-suite-author, openai-evals, promptfoo-evaluation, ragas-evaluation) and 2 agents (llm-red-team-planner, prompt-eval-reviewer). Covers the mainstream OSS LLM-eval ecosystem: Promptfoo + OpenAI Evals + DeepEval + Ragas for functional eval, Giskard for adversarial scan, Langfuse for production observability.