---
title: 'Warning & error catalog'
part: 'Appendices'
partNumber: 11
order: 4
subtitle: 'Every message verbatim → cause → fix → chapter'
---

_Content coming soon._

<Run>{`// A clean design — no warnings
repeat 4 [ fd 20 rt 90 ]`}</Run>

<Checkpoint chapterId="appendix-d">Appendix content coming soon.</Checkpoint>