asdf

asdf is a CLI tool that can manage multiple language runtime versions on a per-project basis.

Runs as asdf|macOS, Linux, Windows|asdf-vm.com

Open form in Otty otty.toml

Version windows

One manifest for every version

All versions

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JSON · TOML

A window holds from its version up to the next one’s. Otty picks the window from the version it finds installed, and a manifest with no window holds for all of them.