# Module View Contract demo

This demo shows producer-checked module export Views flowing into a consumer
check as trusted View Contract evidence.

```sh
tricu check demos/viewContracts/modules/success.tri
# ok

tricu check demos/viewContracts/modules/failure.tri
# symbol 3 (Util.toString application result) expected Bool but got String
```

`util.tri` is a local workspace module. During auto-build, its annotated exports
are checked before the module manifest alias is published. The consumer then
uses the manifest's View Contract metadata and View Tree export artifacts as
module-boundary assumptions; compatibility is still judged by `lib/view.tri`.