WP Block Development

When to use

Use this skill for block work such as:

• creating a new block or updating an existing one
• changing block.json (scripts/styles/supports/attributes/render)
• fixing "block invalid / not saving / attributes not persisting"
• adding dynamic rendering (render.php / render_callback)
• block deprecations and migrations (deprecated versions)
• build tooling (@wordpress/scripts, @wordpress/create-block)
• block patterns and variations

Inputs required

• Repo root and target (plugin vs theme vs full site).
• The block name/namespace and where it lives (path to block.json if known).
• Target WordPress version range (especially for viewScriptModule / apiVersion 3).