I Turned Claude Code Into a Data Lineage Tool for BigQuery. Zero Infrastructure, One Command.

The incident that pushed me to build this It was a Monday morning. A dashboard used by the clinical team was showing wrong numbers. The first Slack message came in at AM: “Something’s off with the membership report.” The next 25 minutes looked like this: open the dashboard, find the underlying table, search the codebase for anything that writes to it, check Airflow for recent DAG runs, ask a teammate if they know which pipeline owns it, find a second pipeline that also writes to the same table, realize there’s also a BigQuery scheduled query doing something to it that nobody documented.