This discussion outlines a sophisticated future for software engineering—moving from manual coding to Formal Architectural Design. In this world, you are no longer a "writer of Rust," but a "Validator of Intent."
Here are the key pillars of that transition:
- The Multi-Layer Verification Stack
The future of high-integrity systems (like a browser engine) isn't one language, but a chain of mathematical evidence:
TLA+ (The Blueprint): Used for Systemic Design. You model high-level concurrency and protocols (like the WebNN "Grocery Checkout" timeline) to ensure the logic doesn't deadlock or race.
Lean (The Bridge): Used for Formal Implementation. It acts as the literal source-of-truth "code" that the AI writes. It proves that the algorithms are correct and, more importantly, that they strictly follow the TLA+ design through Refinement Mapping.