Custom post types in Playground

The scenario

The site keeps its Recipes post type in a must-use plugin — wp-content/mu-plugins/recipes.php, which loads recipes/register.php — so no one can switch it off. A Playground demo with the recipes needs that plugin: without it, there’s no Recipes post type to import into.

The steps

1. Tools → Export: check Recipes (and what the recipes need).
2. Details → Format: Playground, then Playground options → Themes and plugins:
   • Must-use plugins to install: the recipes plugin;
   • the site’s theme, and the plugins the recipes use.
3. Export, then Open in Playground on the copy in Copies.

What happens

The .zip holds mu-plugins/recipes.php and mu-plugins/recipes.zip (the folder it loads). The blueprint writes them into Playground’s wp-content/mu-plugins/ before the import, so the Recipes post type exists when the recipes come in, and the menu shows Recipes with them.

What it doesn’t

• A host’s own must-use plugins (and WordPress Studio’s SQLite loader) aren’t offered: Playground has its own.
• A must-use plugin that loads files from elsewhere (a path outside mu-plugins/) takes only what’s in mu-plugins/.
• Custom code goes inside the file: share it only where its license allows.