This paper presents a conceptual model for enabling incremental compilation in Hylo, a modern memory-safe systems programming language currently under development. Drawing from a comparative study of existing incremental compilation techniques, an in-depth analysis of Hylo's front-end architecture, and exploratory experiments, the model categorizes common types of program changes, introduces a scope-aware AST diffing algorithm, and proposes a lightweight dependency tracking mechanism tailored to Hylo's needs.