graph LR DPV["Deliberate Practice Volume"]:::r1 -->|"+"| PLS["Pattern Library Size"]:::r1 FQ["Feedback Quality"]:::r1 -->|"+"| PLS PLS -->|"+ with delay"| ART["Automaticity of Routine Sub-tasks"]:::shared ART -->|"+"| WMF["Working Memory Freed for Refinement"]:::r1 WMF -->|"+"| EAC["Edge-of-Ability Challenge"]:::pivot EAC -->|"+"| DPV ART -->|"+"| PE["Perceived Effortlessness"]:::r2 PE -->|"−"| WSH["Willingness to Seek Harder Problems"]:::r2 WSH -->|"+"| EAC PE -->|"−"| FQ R1[" R1: Practice Flywheel -- reinforcing, productive "]:::looplabel R2[" R2: Automaticity Plateau -- reinforcing, corrosive "]:::looplabel classDef r1 fill:#4A90D9,stroke:#2C5F8A,color:#fff classDef r2 fill:#E8795A,stroke:#C0392B,color:#fff classDef shared fill:#7B8D8E,stroke:#4A6163,color:#fff classDef pivot fill:#5B7FAF,stroke:#3A5F8F,color:#fff classDef looplabel fill:none,stroke:none,color:#555,font-size:12px