WordPress File wp-includes/theme-templates.php

the_block_template_skip_link()

Prints the skip-link script & styles.

wp_enable_block_templates()

Enables the block templates (editor mode) for themes with theme.json by default.

wp_filter_wp_template_unique_post_slug()

Generates a unique slug for templates.

wp_set_unique_slug_on_create_template_part()

Sets a custom slug when creating auto-draft template parts.