Apply when integrating a new requirement into an existing design. Redesign as if the requirement had been a foundational assumption from day one, instead of bolting it on.
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name: principle-redesign-from-first-principles
description: "Apply when integrating a new requirement into an existing design. Redesign as if the requirement had been a foundational assumption from day one, instead of bolting it on."
---
# Redesign From First Principles
When integrating a change, don't bolt it onto the existing design. Redesign as if the requirement had been there from the start.
- Read all affected files and understand the current design
- Ask: "if we were writing this from scratch with this new requirement, what would we build?"
- Propagate the change through every reference: types, docs, examples, rationale sections
- Think about the whole redesign, then deliver it incrementally
This is the method for preserving option value when integrating changes into an existing design.
