The governing requirements outline โ anchored by bookends.
Before a novelist writes Chapter 1, they know two things: the premise (why this story matters) and the ending (how it must resolve). Many skilled authors go further โ they write the first chapter and the last chapter before filling in anything between. This gives them clear bookends. The story cannot drift because the author always knows where it started and where it must arrive.
The Snap AI Author applies this same discipline to AI development. Before a line of code is written, you define the beginning state โ what problem exists today, what data is available, what the user currently lacks โ and the desired result โ what success looks like when the story ends, the behavior, the output, the experience that defines the application as complete.
Everything built between these two fixed points must advance the story from one bookend to the other. Features that don't do this are not missing functionality โ they are narrative drift. The requirements outline is the map of that journey: the plot arc, the pacing, the sequence logic, the consistency checks. And like a great outline, it is never finished โ it evolves with every iteration, consulted before every chapter.
A requirements outline is not a one-time artifact. Like a story outline under revision, it evolves with each development iteration. Each pass snaps a new point of clarity into focus.