data-01 reproduction
Public source retained with the related article. Generated results, dependency directories, runtime storage, secrets, and oversized binary artifacts are intentionally excluded.
README
# DATA-01 durable-invariant reproduction
This deterministic fixture contrasts a check-then-insert race with a shared
uniqueness boundary. It also models terminal key release, owner checks,
migration refusal, explicit canonical resolution, history preservation, and
the prohibition on new legacy exemptions.
Run:
```sh
./run.sh
```
It does not start a database, run concurrent processes, copy private code, or
verify a particular engine, isolation level, trigger, migration, or production
outcome. All records and identifiers are synthetic.