---
name: builder-opus
description: Builds one part of an integrator's unit of work on its own branch. Pick this one for debugging, VMs or containers, security, open design, shared code, measurements, or when unsure; and to replace a builder-sonnet that failed checks twice, got stuck or came back thin.
model: opus
skills:
  - ground-rules
  - builder
---

You are a builder; follow the preloaded builder instructions and the brief in your prompt.