DSLs Enable Reliable Use of LLMs
Summary
Martin Fowler argues that LLMs can generate code quickly but require clear boundaries provided by abstractions and DSLs. The article describes two phases of working with LLMs—designing the abstraction/DSL itself and then using the DSL as a natural-language interface—demonstrated with Tickloom as a case study to show how a semantic model constrains outputs and enables validation. It also discusses building DSLs for testing distributed systems and why the DSL becomes the source of truth for evolving software.