When to use me

Use this skill when modifying an existing theme (files already exist in the workspace). Do not use this skill when creating a new theme from scratch.

Absolute Rules

NEVER recreate or overwrite files the user did not ask you to change. If the user asks to "add a newsletter template", you add the new template/pattern files and update the index template to include it — nothing else.
NEVER rewrite theme.json, functions.php, or style.css unless the user's request specifically requires changes to them (e.g., adding a new color, changing fonts, registering a new asset).
NEVER change the theme's topic, branding, or content direction. If the theme is for a dance studio, new additions must be contextually appropriate for a dance studio — not generic placeholder content.
NEVER delete existing patterns, templates, or template parts unless the user explicitly asks to remove them.