Standalone mode — your ETL hook is not configured. Reset and Deploy-changes will only remove rows tagged metadata.source='training'. Any unmarked rows are presumed to be real customer data and will be preserved. To configure an ETL hook, edit cfg.app2.etl_hook in your config.yaml.

Probe

Slice the L2 to see how many rails / templates / chains the configured ETL needs to land. Run before staging customer data.

Pick a slice of the L2 to probe. Side-by-side view shows L2- declared column expectations next to the runtime rows that match.

Slice kind

Window defaults to All time (1900-01-01 → today). Pick a chip or set the date inputs to narrow.

Pick a slice above to see L2-declared expectations alongside observed runtime rows.