additional.php is maintained in Git now (taken over from DDEV's generated file): DDEV settings apply inside DDEV only, and secrets.php (gitignored, template secrets.example.php) is merged in everywhere, ignoring empty values. The web container reaches the local MyE&P project as myep-next.ddev.site, as in EP/website. Co-Authored-By: Claude Opus 5.5 <[email protected]>