From BLT 12.x, ACSF capabilities are separated out into a BLT Plugin. Therefore, you must first add this plugin to your codebase by running the following command:

composer require acquia/blt-acsf

To configure a project to run on Site Factory, complete the following steps after initially configuring BLT, but before creating any websites in Site Factory:

1. From the project root, run the following command and commit any changes:

   blt recipes:acsf:init:all
   

2. (Optional) Create one or more custom profiles using the Drupal Console.
3. Ensure the acsf module will be enabled when you install websites on Site Factory, either by adding it as a dependency to your custom profile or by adding it to your remote environment configuration splits.
4. Deploy to Cloud Platform using blt artifact:deploy. You can also deploy code by using a continuous integration configuration.
5. Use the Site Factory update code feature to deploy the artifact.
6. When creating a new website, select your custom profile as the profile.

In all other respects, BLT treats Site Factory installations as multisite installations. To finish setup, including to set up a local development environment for your Site Factory project, see Multisite.