Sequoia Capital, the top-tier venture firm, has just closed on a $180 million new fund called Sequoia Scout III that’s focused exclusively on seed-stage opportunities. It’s a development startup founders will be watching closely, no doubt, so we caught up yesterday with Bryan Schreier, a Sequoia partner who sits on the boards of Dropbox, Thumbtack and Qualtrics, among others, to ask how the vehicle works. Sequoia doesn’t talk often about its processes.