Treat DSLs as a boundary: load/validate/compile DSL data, then run it in a controlled runtime context.
In real systems, a DSL is rarely “just syntax.” It becomes part of deployment: config files, rule packs, versioned behaviors, and runtime safety concerns.
This section focuses on integration discipline: how to load DSL data, validate it, compile it to a stable internal representation, cache it, and run it safely—without turning your whole application into a dynamic eval machine.