Prefect 74,615 (github.com/PrefectHQ/prefect (https://github.com/PrefectHQ/prefect 23,963 ), Apache 2.0, by Prefect Technologies) asks for the least ceremony of the three orchestrators: decorate ordinary functions, call them in ordinary Python, and the server records what ran. Prefect 3.0 shipped on 3 September 2024; this section runs Prefect 3.8.7 (27 September 2026) in Docker 514 , with the same booknest_pipeline.py functions as Writing DAGs and Dagster (demos/ch07/prefect/).