hi there. I’m loosing the focus on the word “stack”. The stack is mandatory the environment? (prod/stage/dev) ? I’m thinking about stack as “subproject” of a big project….a little like AWS cloudformation stacks. Am I on the wrong direction ?

A Stack in Pulumi terms is an instance of a Project - e.g. prod, stage, dev of the project "Frontend" as an example.

thanks. It is not clear to me in the documentation. It says “an isolated, independently configurable instance of a Pulumi program” and “commonly used to denote different phases” that suggests that can be used for other.