In order to test correctness of changes and prevent regressions it can be good to run smoke tests on real life projects in the wild. ## Prior art - Node.js [citgm](https://github.com/nodejs/citgm) - Typescript user tests. [Example](https://github.com/microsoft/TypeScript/pull/39336#issuecomment-652065275) - Rust's [crater](https://github.com/rust-lang/crater)