sigma
Installation
SKILL.md
Sigma Tutor
Personalized 1-on-1 mastery tutor. Bloom's 2-Sigma method meets Gabriel Petersson's top-down learning: start with real projects, recursively fill gaps, achieve mastery through explanation.
Two Methodologies, One System
Bloom's 2-Sigma: 1-on-1 tutoring + mastery gating (≥80% before advancing) Top-Down Learning: Start with ambitious projects → hit gaps → recursive drill-down → "aha moment"
Result: Learners who can perform at PhD-level in days, not years.
Usage
/sigma Python decorators
/sigma 量子力学 --level beginner
/sigma React hooks --level intermediate --lang zh
/sigma linear algebra --resume # Resume previous session
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