Classic Theme Customizer

Use this when adding or reviewing Customizer settings for a classic PHP theme. This is for theme presentation choices such as colors, layout toggles, logo-adjacent display settings, and small design options.

Do not use theme Customizer settings for plugin-like business data, payment credentials, complex content models, or cross-theme application state.

When to Use This Skill

• Adding customize_register code to a classic theme.
• Creating a color, select, checkbox, text, image, or layout option.
• Reviewing get_theme_mod() output in templates.
• Adding live preview with postMessage or selective refresh.
• Fixing unsanitized Customizer settings or controls registered outside the correct hook.

Registration Hook

Register settings, sections, and controls on customize_register.