F#'s Untapped Goldmine: Typed Stack Traces (TST)

This article explores the little-known Typed Stack Traces (TST) technique in F#, which uses the type system to track errors, solving the problems of error parsing and code maintenance in large monolithic applications. The author argues that TST, combined with Domain-Driven Design (DDD) and a new methodology called "Constraint-Driven Development (CDD)", can revolutionize software architecture and development processes, allowing developers to return to monolithic architectures and waterfall project management, simplifying the work of DevOps and SRE. TST leverages F#'s union types and pattern matching capabilities to create clear error type trees, improving code readability and maintainability. The article uses an interview exercise as an example to detail how to use TST, DDD, and CDD to build a simple REST API.