FSE Architecture

Project architecture and structure for the Oh My Brand! WordPress FSE theme.

When to Use

Understanding the project directory structure
Locating files and understanding their purpose
Understanding how blocks are organized
Understanding the build process and asset flow
Configuring theme.json settings

Reference Files

| File | Purpose | |------|---------| | theme.json | theme.json structure and tokens |

Project Structure

oh-my-brand/
├── AGENT.md               # AI assistant guidelines
├── functions.php          # Theme setup, hooks, registration
├── style.css              # Theme metadata (required by WP)
├── theme.json             # Global styles, settings, blocks
│
├── src/                   # Source files (@wordpress/scripts)
│   └── blocks/           # Native WordPress blocks
│       ├── gallery/      # Gallery carousel block
│       ├── faq/          # FAQ accordion block
│       └── utils/        # Shared utilities
│
├── build/                 # Compiled output (generated)
│   └── blocks/           # Built block assets
│
├── blocks/                # ACF custom blocks
│   ├── acf-faq/          # FAQ ACF block
│   └── acf-gallery-block/# Gallery ACF block
│
├── assets/                # Static assets
│   ├── css/              # Global stylesheets
│   ├── js/               # Compiled JavaScript
│   └── icons/            # SVG icons
│
├── includes/              # PHP includes
│   ├── assets.php        # Asset registration
│   └── block-helpers.php # Block utilities
│
├── acf-json/              # ACF field groups (auto-sync)
├── patterns/              # Block patterns
├── tests/                 # Test files
└── docs/                  # Documentation

Theme Architecture

Parent-Child Relationship

WordPress Core
      │
      ▼
Ollie Parent Theme
  • Base FSE templates
  • Default block styles
      │
      ▼
Oh My Brand! Child Theme
  • Custom blocks (native + ACF)
  • Extended theme.json
  • Brand-specific styles

File Loading Order

WordPress Core loads first
Ollie Parent Theme functions.php
Oh My Brand! functions.php
theme.json merges (child overrides parent)
Block assets loaded per-block when rendered

Block Organization

Native Blocks (src/blocks/)

Built with @wordpress/scripts, compiled to build/blocks/:

| File | Purpose | |------|---------| | block.json | Block metadata | | index.js | Registration entry | | edit.tsx | Editor component | | render.php | Server-side render | | helpers.php | Helper functions | | style.css | Frontend styles | | view.ts | Frontend Web Component |

ACF Blocks (blocks/)

ACF PRO blocks, not compiled:

| File | Purpose | |------|---------| | block.json | ACF block metadata | | render.php | Render template | | helpers.php | Helper functions | | style.css | Block styles |

Key Differences

| Aspect | Native Block | ACF Block | |--------|--------------|-----------| | Location | src/blocks/ | blocks/ | | Name prefix | theme-oh-my-brand/ | acf/ | | Data source | $attributes | get_field() | | Editor UI | React component | ACF fields | | Build | Required | Not required |

Asset Pipeline

Build Process

Source                    Build Output
──────                    ────────────
src/blocks/gallery/
├── index.js         →    build/blocks/gallery/
├── edit.tsx              ├── index.js
├── view.ts               ├── view.js
├── style.css             ├── style-index.css
└── editor.css            └── index.css

Commands

| Command | Purpose | |---------|---------| | pnpm run build | Production build | | pnpm run start | Watch mode | | pnpm run lint | Run all linters |

Asset Loading

| Property | When Loaded | |----------|-------------| | style | Block rendered (frontend + editor) | | editorStyle | Block in editor | | viewScript | Block on frontend page |

Data Flow

Native Block Data Flow

block.json (attributes) → edit.tsx (editor state)
      ↓
$attributes (saved to post)
      ↓
render.php (server render)
      ↓
view.ts (frontend interactivity)

ACF Block Data Flow

ACF Field Group (acf-json/) → WordPress Editor (ACF forms)
      ↓
get_field() (post meta)
      ↓
render.php (server render)

theme.json Configuration

Structure

See theme.json for complete structure example.

Design Tokens

| Token Type | CSS Variable | |------------|--------------| | Colors | var(--wp--preset--color--primary) | | Spacing | var(--wp--preset--spacing--20) | | Typography | var(--wp--preset--font-family--body) | | Layout | var(--wp--style--global--content-size) |

Related Skills

native-block-development - Block creation
acf-block-registration - ACF blocks
css-standards - CSS and theme.json tokens
fse-git-workflow - Development workflow

fse-architecture