This is a plugin that requires a set of other plugins that are (almost) always used in 26B projects.
The plugins are provided in this bundle, but they may also be used standalone, by downloading any of the files in the plugins/ folder.
Use composer to install, as it is required to extract the existing plugins into the base of the mu-plugins folder.
First configure the extra setting in composer.json so as to include the wordpress-muplugin composer package type as a target for the mu-plugins/ folder.
{
"extra": {
"installer-paths": {
"mu-plugins/{$name}/": [
"type:wordpress-muplugin"
]
}
},
}
Then require the dependency.
composer required 26b/wp-must-use