asdf plugin add semtag
# or
asdf plugin add semtag https://github.com/junminahn/asdf-semtag.git

# List all versions of a package
asdf list all semtag

# Install a specific version of a package
asdf install semtag <version>

# Install the latest stable version
asdf install semtag latest

# Set the package global version
asdf global semtag <version>

# Check the version
semtag --version