Bevy and rust in general uses semver with a special case for 0.x releases. See https://doc.rust-lang.org/cargo/reference/semver.html https://doc.rust-lang.org/c

Bevy and rust in general uses semver with a special case for 0.x releases. See https://doc.rust-lang.org/cargo/reference/semver.html https://doc.rust-lang.org/cargo/reference/semver.html > Initial development releases starting with "0.y.z" can treat changes in "y" as a major release, and "z" as a minor release. "0.0.z" releases are always major changes. This is because Cargo uses the convention that only changes in the left-most non-zero component are considered incompatible. The 0.x is essentially used as way to tell people to use at their own risk since it isn't considered stable yet. Using a library like this isn't asking for trouble if you know what you are dealing with and in the context of bevy it currently means a breaking change every 3 months with a blog post and migration guide.