Plan phase
Review the cover, mechanics, and art list before the long build.
What you see
The plan is the contract for the first build: a cover, the systems, the scenes, and the art list. Read it. If the camera is wrong, or the loop is not the game you named, say so before the long session starts writing files.
First-build dispatch is refused unless that plan exists. A failed plan does not fall through to some other kind of game.
Changing the plan
Type the correction in chat. "Make it first-person" or "this is a serving game, not a fighter" is enough. The next plan should reflect that, then the build follows the amended plan.
While it builds
The cover and mechanics stay on screen during codegen, with live status. That is deliberate. The preview pane is still there underneath; it should not flash "no build reported" for a second and then appear. When an export is ready, you play the Godot game in that pane.