github-readme

$ gem install github-readme --pre

$ github-readme dkhamsing/awesome_bot
Gettin README for dkhamsing/awesome_bot ...
Writing dkhamsing-awesome_bot-readme.md

$ irb
irb(main):001:0> require 'github-readme'
=> true
irb(main):002:0> GitHubReadme::get 'postmates/PMJSON'
=> {=> {"name"=>"README.md", "readme"=>"# PMJSON\n\n[![Version](https://...", "summary"=>"PMJSON provides a pure-Swift strongly-typed JSON encoder/decoder as well as a set of convenience methods for converting to/from Foundation objects and for decoding JSON structures.", "error"=>nil}