V1 proved the idea. V2 makes it dependable. The gap between a working prototype and a foundation you'd stack ten systems on is exactly the work this week closed.
The first version of the Cathedral Framework was a sketch that ran — enough to validate the pattern, not enough to build on with confidence. V2 is the version that turns the sketch into structure: typed end to end, with the sharp edges filed off.
TypeScript throughout is the headline change. The types aren't decoration; they're the contract that lets a solo operator refactor aggressively without holding the whole system in their head. The compiler remembers what the human can't.