---
title: "engineering — Blog | Once Books"
description: "Every Once Books post tagged “engineering”."
source: "https://www.oncebooks.com/blog/tag/engineering/"
---

Topic

# Engineering

1 post on this topic.

- [18 August 2026 · 5 min read](https://www.oncebooks.com/blog/how-the-consistency-engine-works/) — The four locks behind a consistent AI picture book Character consistency across a whole book isn’t a prompt trick. It takes four specific locks — here is each one and why it’s necessary.

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