Simon Willison’s Weblog

How should I evaluate a potential technical co-founder? What qualities matter most to the business, to investors, to future employees?

My answer to How should I evaluate a potential technical co-founder? What qualities matter most to the business, to investors, to future employees? on Quora

Build a small weekend project with them. If they can’t build and (more importantly) ship something simple in a couple of days, with you collaborating with them effectively on what it is, how it should work and so on, they aren’t a good fit.