This directory provides core support infrastructure for Gutenberg blocks, including block attribute validation, feature compatibility management, and backward compatibility layers for legacy theme integration.
block-features.js
Core feature registration system
attribute-validator.js
Block schema validation logic
compatibility.php
Legacy theme adapter layer
metadata-store.js
Runtime block metadata manager
registration.js
Support API interface registry
legacy-support/
Classic editor bridge components
Contains critical block compatibility systems. Modify only with valid development tools.