chemlab-benchmark-green-agent is a benchmark designed to evaluate the scientific reasoning and research capabilities of AI agents in the domain of analytical chemistry. Using Atrazine (a widely studied herbicide) as the core analyte, the benchmark evaluates performance across five key task categories: 1) Literature Extraction & Summarization, 2) Analytical Method Comparison & Design, 3) Troubleshooting (diagnosing common experimental failures and providing technical remedies, 4) Sample Preparation & Recovery, 5) Technical Reporting in Markdown format. Agents are assessed using a deterministic, rubric-based evaluator that scores reports on a scale of 0–5 across five criteria: Task Completion, Factual Correctness, Coverage, Clarity & Structure, and Format Compliance.