[x] Access to built-in libraries that are installed along with OPAM
[x] Locally redirection or vendoring of arbitrary dependencies
[x] Allow different branches of the same remote git repository (though not at the same time)
[x] Support of a public index from the web
[x] Support of a public index from a file
[x] Support of a public index from files installed along with OPAM
[x] Local building environments by default, and co-development of two or more local libraries as an option (e.g., changing both Yuujinchou and algaett at the same time)
[x] Options to work offline (which would turn off git auto-fetch)
[x] Thread/domain-safety
features for consideration
Quick checking of dependencies
Version constraint solving
Generic namespace specification (inspired by MLton)
clean-ups
features
features for consideration