# CHG-03 compatibility-authority reproduction

This deterministic fixture demonstrates the argument in “A Characterization
Test Is Not a Product Decision.”

It contains:

- an environment-sensitive observed policy;
- a characterization suite which records that policy;
- a common-default candidate;
- an explicit-choice candidate; and
- separate contract cases for each candidate decision.

Run:

```sh
node experiment.mjs
```

All inputs, names, behavior, and values are synthetic. The fixture does not
reproduce a private application, customer setting, label format, or production
result.