also: りどめ
noun
readme; README file
Computing slang for a README file, typically a text file containing important information about software. Used in developer and online communities.
このソフトの使い方はれどめを読めばわかるよ。
You'll understand how to use this software if you read the readme.
れどめに必要なライブラリが書いてある。
The required libraries are listed in the readme.