minor edit

Author: tvarney13

internal/dev_server/manifesto.md

@@ -8,9 +8,7 @@ First and foremost, `dev-server` is meant as a replacement for local dev and CI
 
 We implemented it this way in order to solve a problem common both internally and amongst our userbase where an environment would get created per developer on a project as well as per CI build. As you could expect, this becomes exponentially harder to maintain as the number of environments scales both technically and from a process perspective - something has to clear out those environments after all!
 
-Another intentional design decision was the choice not to allow the creation of local-only flags. A running `dev-server` can only pull from a real environment. From there, you can override the served value for your local environment.
-
-We chose to do this in order to minimize any surprises as your code moves from local / CI to a prod / prod-like environment. In our experience, the greatest source of such surprises has been drift between the configuration of a developer's LD environment and our Staging environment. Unless a developer is constantly making sure their flag state matches higher environments as closely as possible, flag state drifts until their local development environment starts to break, neccessitating a painful process of reconciling flag state.
+Another intentional restriction is that flags must first exist in the source environment. We chose to do this in order to minimize any surprises as your code moves from local / CI to a prod / prod-like environment. In our experience, the greatest source of such surprises has been drift between the configuration of a developer's LD environment and our Staging environment. Unless a developer is constantly making sure their flag state matches higher environments as closely as possible, flag state drifts until their local development environment starts to break, neccessitating a painful process of reconciling flag state.
 
 Lastly, do not use the `dev-server` for environments with prod-level traffic. As we designed this with local dev in mind, production throughput has never been tested.