Agent Skills: variation-theory

Apply variation theory of learning to structure instructional content using contrast, generalization, and fusion patterns. Variation must target the critical aspects of the learning objective. Use when writing educational materials, explanations, tutorials, literate programming documentation (.nw files), structuring lecture slides, designing exercises, or when user mentions variation theory, learning theory, pedagogy, or critical aspects of learning. Works alongside the literate-programming skill for .nw files.