data-04 reproduction
Public source retained with the related article. Generated results, dependency directories, runtime storage, secrets, and oversized binary artifacts are intentionally excluded.
README
# DATA-04 nullable-shape reproduction
This deterministic fixture enumerates every presence combination across four
related values. It accepts only a complete snapshot or a named legacy absence,
keeps zero distinct from null, and rejects partial snapshots.
Run:
```sh
./run.sh
```
It does not run a database, migration, framework validator, invoice, or private
implementation. All fields, values, records, and consumer policies are
synthetic.