Ai Agent Evaluator

AI Agent Evaluator

Your expert companion for evaluating, benchmarking, and improving AI agents.

In 2026, AI agents are deployed in production at scale — but most teams lack systematic ways to measure their reliability, safety, and real-world performance. This skill bridges that gap by guiding you through rigorous, structured agent evaluation workflows.

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What This Skill Does

• Evaluation Suite Design — Build custom test suites tailored to your agent's domain (coding, customer support, research, data analysis, etc.)
• Benchmark Analysis — Interpret industry benchmarks (SWE-Bench, AgentBench, WebArena, BFCL, ToolBench) and map them to your use case
• Multi-Framework Comparison — Compare CrewAI, LangChain, AutoGen, LlamaIndex, and OpenAI Assistants across cost, latency, and task success rate
• Failure Mode Analysis — Systematically identify where and why your agent fails
• Red Teaming Support — Design adversarial tests to probe agent safety and edge cases
• Evaluation Report Generation — Produce structured reports with scores, recommendations, and improvement roadmap

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Trigger Phrases

English:

• "evaluate my AI agent"
• "benchmark this agent"
• "compare CrewAI vs LangChain"
• "how to test an AI agent"
• "agent quality assurance"
• "my agent keeps failing at X"
• "design evaluation suite for agent"
• "agent red teaming"
• "production readiness check for agent"

Chinese / 中文:

• AI Agent 评估
• 智能体基准测试
• Agent 质量保障
• 如何测试 AI Agent
• 比较 CrewAI 和 LangChain
• Agent 失败分析
• 大模型 Agent 上线前检查
• 智能体对比测试
• Agent 红队测试

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Core Workflows

Workflow 1: Quick Agent Health Check

Input: Agent description, task type, sample inputs/outputs Steps:

1. Classify your agent type (tool-calling, reasoning, multi-step, RAG-based)
2. Define 5 critical success criteria for your domain
3. Run 10-question diagnostic on failure patterns
4. Output health score + top 3 risks

Workflow 2: Benchmark Selection & Interpretation

Input: Agent capabilities, deployment domain Steps:

1. Map domain → relevant benchmarks
2. Explain benchmark methodology (what it tests, limitations)
3. Show current SOTA scores and realistic targets
4. Recommend evaluation cadence (dev/staging/production)

Workflow 3: Custom Evaluation Suite Design

Input: Agent goal, available test data, budget/time Steps:

1. Define evaluation dimensions (accuracy, latency, safety, cost)
2. Generate 20-50 representative test cases with ground truth
3. Set pass/fail thresholds per dimension
4. Recommend tooling (PromptFoo, Maxim AI, DeepEval, Braintrust)
5. Provide scoring rubric + analysis template

Workflow 4: Failure Mode Deep Dive

Input: Agent logs, failed task transcripts Steps:

1. Categorize failures (tool call error, hallucination, loop, context loss, safety block)
2. Calculate failure rate by category
3. Root cause analysis for top-3 failure patterns
4. Actionable fixes: prompt adjustments, retrieval improvements, tool schema corrections

Workflow 5: Multi-Agent Framework Comparison

Input: Use case requirements (e.g., "code review pipeline with 3 agents") Steps:

1. Score CrewAI / LangChain / AutoGen / LlamaIndex on 8 dimensions
2. Estimate cost per 1,000 runs
3. Provide side-by-side architecture diagram (text)
4. Final recommendation with rationale

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Example Interactions

User: "I built a customer support agent with GPT-4o. How do I know if it's ready for production?"

Agent Evaluator:

Great question. Let's run a production readiness assessment across 5 dimensions:

1. Task Completion Rate — target >92% for Tier-1 support queries
2. Hallucination Rate — should be <2% on factual product questions
3. Escalation Accuracy — correctly identifies when to route to human
4. Latency P95 — target <3s for chat use case
5. Safety Compliance — passes 50-case adversarial test suite

To start, share 10 sample conversations (anonymized) and I'll generate your baseline scorecard.

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User: "Compare CrewAI vs LangChain for a financial report analysis pipeline"

Agent Evaluator:

Here's a side-by-side for your use case... [generates structured comparison table + recommendation]

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Key Concepts Covered

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Target Users

• AI Engineers building and deploying LLM-based agents
• ML Platform Teams establishing evaluation standards
• Product Managers making go/no-go decisions on agent releases
• QA Engineers new to AI agent testing
• Researchers comparing agent frameworks

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Tools & Frameworks Referenced

• DeepEval — open-source LLM evaluation framework
• PromptFoo — prompt testing and red teaming
• Braintrust — evaluation and logging for LLM apps
• Maxim AI — agent simulation and observability
• LangSmith — LangChain's evaluation and tracing platform
• Confident AI — production AI evaluation platform

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Notes & Limitations

• This skill provides evaluation methodology and guidance, not direct code execution
• Benchmark scores are time-sensitive — always check latest published leaderboards
• For production safety evaluations, always involve your security team
• Evaluation results should be reviewed by qualified ML engineers before deployment decisions

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Built for AI teams who ship agents to production — not just demos. Author: @gechengling | version: "3.0.2"

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Failure Mode 分类树（2026版）

失败根因分析（Top 3）：

1. 幻觉输出（共30%）：LLM在无工具/数据支撑时"脑补"信息 → 修复：强制"无工具不回答"+ 引用校验
2. 工具调用失败（共45%）：API不稳定+参数错误 → 修复：重试机制+参数预校验+Schema自动修正
3. 数据质量（共20%）：RAG检索不准 → 修复：多路检索+查询扩展+重排序

评估工具推荐（2026）：

• DeepEval：开源，支持CustomMetric，适合研发阶段深度评估（Python）
• PromptFoo：红队测试+Prompt版本对比，适合上线前压力测试（Cloud/SDK）
• MLflow + LangSmith：生产追踪+失败聚类，适合上线后监控（平台集成）

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GitHub: https://github.com/gechengling/ai-agent-evaluator