Agree, but it would be nice to have access to the entire composer community without setting up a composer environment, so not to toot my own horn, but I wrote proof of concept script to download PHP composer dependencies by parsing comments from the PHP script itself.

https://gist.github.com/tored/b500eb7c10fbabbe2043126e51caf2...

It would be nice to have something like this more integrated within the shell or maybe composer itself.