A Minimal FSE WordPress Theme Built for Developers
TL;DR
Built a minimal WordPress Full Site Editing (FSE) theme for developers who want control over their codebase. Uses theme.json design system, 10 pre-built block patterns, 3 color variations, WooCommerce support, and AI editor integration. First production deployment—an industrial product showcase site—is live.
Background
Business websites and lightweight e-commerce (product showcase focus) have clear requirements: clean code, easy customization, good performance. However, mainstream free themes tend to bundle excessive features with visual page builders and third-party dependencies, resulting in large codebases and high maintenance costs. For developers who prefer managing projects through code, these themes become a burden rather than a solution.
Solution
Adopted WordPress Full Site Editing architecture with theme.json as the single source of design tokens. Templates use pure HTML block markup—no PHP template logic—allowing content management through WP-CLI and version control.
Defined strict code constraints: functions.php serves only as an entry point loading modules; styles go to theme.json first with CSS only for edge cases; JS loads on demand with no default interactions. These constraints ensure clean structure and controlled footprint.
Pre-built 10 common block patterns (Hero, Feature, CTA, Pricing, Team, Testimonial, Contact, etc.) and 3 color schemes, enabling developers to quickly scaffold business sites. WooCommerce compatibility follows a lightweight approach—no template overrides, only CSS fixes for layout issues.
Integrated AI editor assistant using backend proxy mode: API keys stored server-side, frontend authenticates via WordPress nonce and calls REST API proxy, preventing key exposure. Supports AI-assisted generation for paragraphs, headlines, lists, CTAs, and FAQs.
Deliverables
Theme is open-sourced on GitHub, current version v1.1.1, compatible with WordPress 6.7. First production deployment—an industrial product showcase site—is live, validating real-world usability.
Technical highlights include: complete Design Token system (10-step neutral scale, responsive spacing, transition variables), SEO output (Open Graph + JSON-LD Schema), WCAG accessibility (Skip to Content link), 4 block style variations (Outline Button, Card Group, etc.).
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