wp-includes/blocks/paragraph.php:45Registers the core/paragraph block on server.
function register_block_core_paragraph() { register_block_type_from_metadata( __DIR__ . '/paragraph' );}Introduced in 7.0.0. Unchanged from 7.0.4 through 7.1.0.
Signature, return type and hooks compared across 2 parsed releases.
src/wp-includes/blocks/paragraph.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.