At what point do you lock your shot list before production?

Director here, been working on a short with a small crew and kept running into the same fragmentation problem diana mentioned in the pre-pro tools thread. Screenplay in one place, Shot list in another, Storyboards somewhere else entirely, nothing talking to each other

the specific breakdown for me was always between the script and the first real shot decision. id finish a scene, know what i wanted emotionally, then spend hours translating that into a shot list manually. by the time i had the list the blocking notes were in my head not on paper and something always got lost on set

Started building a tool around this gap. Here you upload the screenplay, it breaks the scene into shots with camera angle, shot type, blocking, and generates rough storyboard frames as visual references. small team, mostly filmmakers who got tired of the same bottlenecks. building the tool we kept wishing existed. its called StoryBirdie.com

but genuinely curious how others handle this. Do you lock your shot list before location scout, after, or is it always evolving up to the shoot day?