Letting the workflow do all the maths and only handing finished figures to the AI for the summary is exactly the right order, and I wish more teams did that. Your story about the report showing 0 positives because of one mismatched column name is such a useful reminder to check totals against the raw data. Coming from public health, I'd love to see a rule for zero tests reported on days when clients were seen, since silent gaps can hide outbreaks as easily as typos do.