Carview!

Filters whether to enable automatic core updates for development versions.

Parameters

$upgrade_devbool: Whether to enable automatic updates for development versions.

if ( ! apply_filters( 'allow_dev_auto_core_updates', $upgrade_dev ) ) {

Used by	Description
core_auto_updates_settings()`wp-admin/update-core.php`	Display WordPress auto-updates settings.
WP_Site_Health_Auto_Updates::test_accepts_dev_updates()`wp-admin/includes/class-wp-site-health-auto-updates.php`	Checks if the install is using a development branch and can use nightly packages.
Core_Upgrader::should_update_to_version()`wp-admin/includes/class-core-upgrader.php`	Determines if this WordPress Core version should update to an offered version or not.

Version	Description
3.7.0	Introduced.