structural-design-principles

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SKILL.md

Structural Design Principles

These principles originated in object-oriented design but apply to any programming paradigm . They're about code structure, not paradigm.

Paradigm Translations

In functional programming (Elixir), they manifest as:

  • Composition Over Inheritance → Function composition, module composition, pipe operators
  • Law of Demeter → Minimize coupling between data structures, delegate to owning modules
  • Tell, Don't Ask → Push logic to the module owning the data type
  • Encapsulation → Module boundaries, immutability, pattern matching, opaque types

In object-oriented programming (TypeScript/React): Apply traditional OO

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