Actually no, it manages the versions of the languages themselves, but doesn't interact with their package managers at all. The .tool-versions file it uses to ma

Actually no, it manages the versions of the languages themselves, but doesn't interact with their package managers at all. The .tool-versions file it uses to mark the current version could be thought of as a lock file as well. It replaces (for Ruby) rbenv/rvm, not rubygems. Rustup, not Cargo, etc.