Use this skill when a Prefect flow contains data quality or testing logic: @task functions that run SQL assertions, Great Expectations checkpoints called from a @task, Soda check tasks, or threshold checks that raise exceptions on failure. Triggers: any Prefect @task that queries a database to validate data, any use of great-expectations or soda-core inside a Prefect flow, any task that checks row counts, null counts, or data bounds.