Currently, Codespaces users in organizations in Team and Enterprise Cloud plans can use any machine type, from 2-core to 16-core (or even 32-core). We've heard from many organization administrators that they want the ability to restrict which machine sizes repositories in their organization should have access to as a means of cost control, and have implemented a new Codespaces policy feature to allow admins this level of control.
Organization admins can now visit their organization's settings page and create Codespaces policies to restrict which machine types repositories in their organization can use. For instance, an admin can restrict certain repositories to only access 2-core and 4-core machines, while granting other, more compute intensive repositories, access to 16-core machines.
In the future, the Codespaces policy feature will be expanded to include additional constraints, including setting a maximum idle timeout, restricting which port forwarding settings are allowed, and more. We'd love your feedback on other constraints you're interested in.
For more information, see "Restricting access to machine types".