notebook-osm — the Monaco OSM + GTFS demo notebook

A pure data layer that ships ONE file: a 10-cell self-contained marimo notebook demonstrating the full marimo stack end-to-end.

The notebook self-authors its own Airflow DAGs at runtime — no DAG files are baked into the image. It writes both the OSM pipeline DAG and the GTFS transit pipeline DAG into the airflow DAGs folder, triggers them in parallel via the REST API, polls both to success, then runs analysis + visualisation cells.