What is the breaking change in semver 2.0.0

Question

There is a version 2.0.0 of the semantic versioning spec, given that you should:

increment the MAJOR version when you make incompatible API changes,

What was the incompatible change between semver 1.0.0 and 2.0.0?

Answer 1

I asked on the semver github repo. There are two changes that are not backwards compatible:

• leading zeros are not accepted
• minor version numbers MUST be incremented if API is marked as deprecated