Type Systems as Product Strategy

A type system is not a developer convenience. Used well, it is a product decision about which mistakes your users are allowed to experience.

Haskell taught us to make invalid states unrepresentable, then we carried the habit into TypeScript and Rust. The payoff shows up where you least expect it: in support tickets that never get filed.

Ship trust, not just features#

When the compiler enforces the rules of the domain, a whole category of bugs cannot reach production, which means a whole category of incidents cannot reach the customer.

Every invariant you encode is a QA engineer you didn't have to hire.

That is the strategy: spend modeling effort up front so the expensive failures are impossible by construction, not merely unlikely.