Optimistic UI needs a rollback plan
An instant interface is only trustworthy when pending, rejected, and retried work all have a clear path.
Notes
Engineering notes from
work in progress.
Short notes about frontend behavior, data models, and running web applications at the edge.
What belongs at the edge?
The right execution point follows the whole data path, not the word “edge” on an architecture diagram.
Shape a D1 model around its query paths
A small schema stays adaptable when its constraints, indexes, and migrations describe work the product already performs.