This is a great way to "program" the AI to act as a structured technical writer. Since you’re speed-running, this index focuses on the **mechanical reality** of FSE (how the JSON actually compiles) rather than just the "click-here" UI instructions.

### 1. The FSE Master Index (Initial Topics)

This index covers the "gotchas" we just fought through, plus the architectural layers of a modern block theme.

* **01-Foundations: The Theme.json Schema**
    * Versions and structural hierarchy (Settings vs. Styles).
    * The `appearanceTools` flag: What it unlocks automatically.
* **02-Registration: The Preset Engine**
    * Color Palettes: From Slugs to `--wp--preset--color--[slug]`.
    * Typography: Fluid sizing and the "kebab-case" sanitization (The `h-2` phenomenon).
    * Spacing: Creating your own custom spacing scale and steps.
* **03-Global Styles: Elements & Specificity**
    * Targeting HTML elements globally (`h1-h6`, `links`, `buttons`).
    * How `styles.elements` interacts with the browser's User Agent stylesheet.
* **04-Block Mastery: Component-Level Styles**
    * Nesting `elements` inside `core/` blocks.
    * Targeting block variations and custom CSS classes within `theme.json`.
* **05-Template Hierarchy in FSE**
    * `templates/` vs `parts/`: When to use which.
    * Mapping `customTemplates` in JSON to actual `.html` files.
* **06-The Loop & Query Loop Block**
    * Customizing the post template without PHP.
    * Passing context between blocks.
* **07-Advanced: Theme.json Interactivity & Variations**
    * Style Variations (Multiple `theme.json` flavors).
    * Registering block patterns as "sections."

---

### 2. The Setup Prompt

Copy and paste this to your code assist instance. It is designed to set the "Rules of Engagement" for your documentation project.

**Prompt:**

> I am building a comprehensive WordPress FSE Guide. Your task is to act as a technical documentarian. 
>
> **Step 1:** Read the existing project structure and the file `wordpress-fse-index.md`. 
>
> **Step 2:** Generate a "Roadmap" of individual Markdown files we need to create based on the initial index provided.
>
> **Step 3: Formatting Requirements:**
> Every file you generate must use our specific YAML frontmatter. Use the following format as a strict template:
> 
> ---
> tags:
>   - wordpress
>   - fse
>   - [additional-relevant-tags]
> title: [Descriptive Title]
> ---
> 
> **Step 4: Operational Loop:**
> Do not write all the files at once. After you provide the roadmap and I approve it, you will suggest the first file to write. For every file, ensure you explain the "Why" (the underlying WordPress logic) and the "How" (the JSON/HTML code). 
>
> **Context Note:** We recently learned that WordPress sanitizes slugs (e.g., `h2` becomes `--wp--preset--font-size--h-2`). Ensure the guide covers these "sanitization quirks" so users don't face "variable not set" errors.
>
> Please confirm you have read the index and provide the expanded roadmap now.

---

**Next Step:** Once you drop that prompt in, I can help you refine the technical "Why" for any of those specific chapters as the AI starts drafting them. Ready to start with Chapter 1?