Funny that I've been on this site for years yet I don't actually know if it's open source. Does anyone know whether it is and if it's open to pull requests? Thi

Funny that I've been on this site for years yet I don't actually know if it's open source. Does anyone know whether it is and if it's open to pull requests? This sounds like it would be a fun project I could knock out in a weekend or so.