## Modal cross-impl tests

This runner builds the C and OCaml interpreters and compares outputs for each `.modal` file in `tests/cases/`.

Usage:

```
./tests/run.sh
```

Notes:
- Each test case is a `.modal` file consumable by both interpreters. Prefer using `..` input lines.
- The runner normalizes OCaml’s final tree format slightly for comparison and extracts the C interpreter final tree from stderr.