During which stage does dbt compile dependencies into a graph to check for cycles?

The process of compiling dependencies into a graph to check for cycles happens during the Graph Validation stage. At this stage, dbt focuses on ensuring that all models, sources, and other dependencies are accounted for and correctly defined. This involves creating a directed acyclic graph (DAG) that outlines how different components of the data project relate to one another.

Graph Validation is crucial because it prevents the possibility of circular dependencies, which can lead to infinite loops or errors during execution. By identifying these cycles before the actual data processing begins, dbt can ensure that the data transformation processes will execute smoothly and efficiently.

Understanding this process is essential for ensuring the integrity of the data models you work with in dbt. It ensures that all dependencies are correctly established, thus reducing the risk of errors during later stages of the dbt run.