Redacted excerpt; full evidence withheld.

$ cd <host-path> && git log -1 --format=%H 2>/dev/null; ls -la; cat README.md 2>/dev/null | head -200
exit: 0
nf` instead of `#NUM!`.
- **Speed:** regions cover columns that repeat one formula over the same rows. Lookups in every row (VLOOKUP, INDEX/MATCH)
  still run cell by cell and are slower (about 6 s per 1,000 lookups). Running totals other than plain sums
  (`=C1*1.05+B2`, `=MAX(C1,B2)`) also run cell by cell.
- **The answer key:** a workbook must have been saved by Excel; `formulas` (the `compute` extra) is a weaker fallback
  and is known to disagree with Excel in places.
- **dbt:** the generated project targets DuckDB (`dbt-duckdb`). Other warehouses are not generated yet.

## Security and privacy

[excerpt truncated]