Bacon is a Rust code checker designed for minimal interaction, allowing users to run it alongside their editor to receive real-time notifications about warnings, errors, or test failures (I like having it show clippy's hints).
It prioritizes displaying errors before warnings, making it easier to identify critical issues without excessive scrolling.
Screenshot (from an old version I think):
v3 adds support for cargo-nextest, plus some QoL improvements.
You can set it to show what you want; if I'm doing TDD I'll set it to show the test output, and then it'll show the warnings beneath it.
You can switch between the views with a key (T for tests (or N for nextest), C for clippy, etc
But yes, it's pretty similar to using watch.