```ruby
#!/usr/bin/env ruby

module Rebuild
  class RbldListCommand < Command
    legacy_usage_implementation :list
    legacy_run_implementation :list
  end
end
```

Convert rbld list usage to Ruby
user
```ruby
#!/usr/bin/env ruby

module Rebuild
  class RbldListCommand < Command
    def initialize
      @usage = "list [OPTIONS]"
      @description = "List local environments"
    end

    legacy_run_implementation :list
  end
end
```
assistant