It appears that VSCode always opens a folder in with the last UI state it had.
I'm looking for something like Sublime's remember_open_files: false, or in other words, I would like VSCode to open up with a clean UI state regardless of what state the UI was in the last time the folder was open.
What's happening now:
cd my-project-folder/
code .
# VSCode opens folder with saved UI state
What I want:
cd my-project-folder/
code .
# VSCode opens folder with fresh UI state