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---
name: a-philosophy-of-software-design
description: Apply John Ousterhout-inspired software design rules when reducing complexity, designing module boundaries, or reviewing APIs and abstractions.
license: MIT
---
# A Philosophy of Software Design Skill
Use this skill when a task involves module design, API design, information hiding, abstraction depth, cognitive load, or refactoring shallow interfaces.
Before making design or code decisions, read and apply [a-philosophy-of-software-design.mini.md](a-philosophy-of-software-design.mini.md). Use [a-philosophy-of-software-design.md](a-philosophy-of-software-design.md) only as a deeper reference when the mini rules are not enough for the current design tradeoff.
