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brownfield-adoption

Step-by-step process for adopting Cavekit on an existing codebase. Covers the 6-step brownfield process, bootstrap prompt design, spec validation against existing behavior, and the decision between brownfield adoption vs deliberate rewrite. Trigger phrases: "brownfield", "existing codebase", "add Cavekit to existing project", "adopt Cavekit", "layer kits on code", "retrofit kits"

plugins/JuliusBrussee/blueprint/skills/brownfield-adoption/SKILL.md

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# Brownfield Adoption: Adding Cavekit to Existing Codebases

Brownfield adoption layers kits on top of existing code without rewriting it. The existing codebase becomes reference material, and kits are reverse-engineered from what the code actually does. Once kits exist, all future changes flow through the Cavekit lifecycle.

**Core principle:** The existing code is not the enemy -- it is the source of truth for cavekit generation. Respect what works; cavekit what matters.

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## 1. When to Use Brownfield Adoption

Brownfield adoption is the right choice when:

- You have a **working codebase** that you want to improve incrementally
- You want to adopt Cavekit **without stopping development**