Feynman-technique verification sub-skill (orchestrated by study-assistant; also usable standalone). Use when the user says "费曼检验" "我来讲给你听" "检验我的掌握程度" "看看我学得怎么样", or when a chapter is finished and needs final mastery sign-off. The learner explains a point in their own words; Codex plays a sharp begin
Feynman-technique verification sub-skill (orchestrated by study-assistant; also usable standalone). Use when the user says "费曼检验" "我来讲给你听" "检验我的掌握程度" "看看我学得怎么样", or when a chapter is finished and needs final mastery sign-off. The learner explains a point in their own words; Codex plays a sharp beginner, probes gaps, scores mastery 1-5, and writes mastery reports.