A/B test design — produce an experiment spec with hypothesis, primary metric, MDE, sample size, run time, and decision rule. Also determines when NOT to A/B test and what to do instead. Use when asked to "design an A/B test", "should we test this", "experiment design", "how do we know if this works", "what's the sample size", or "set up an experiment".
This skill does not declare a tool allowlist. The agent host applies whatever default tools are available at runtime.
SKILL.md / Manifest
https://raw.githubusercontent.com/jeremylongshore/claude-code-plugins-plus-skills/main/plugins/ai-agency/tonone/skills/lumen-abtest/SKILL.mdRegistry
github (via claudemarketplaces.com)