Rust -- Hub

Meta-Cognition Framework

Before answering, identify the cognitive layer:

Layer 3: Domain Constraints (WHY)
  Business rules, regulatory requirements
  "Why is it designed this way?"

Layer 2: Design Choices (WHAT)
  Architecture patterns, DDD, error strategy
  "What pattern should I use?"

Layer 1: Language Mechanics (HOW)
  Ownership, borrowing, lifetimes, traits
  "How do I implement this in Rust?"