Since we all spend more time writing code than reading, my current tech screen is a small program in the tech for the role we're interviewing for that has a mix

Since we all spend more time writing code than reading, my current tech screen is a small program in the tech for the role we're interviewing for that has a mix of obvious and subtle bugs, some poor data modeling, etc. First step is to get it working to spec, then refactor. I find it very engaging for interviewer and interviewee, is hard to game and gives me a sense of what the person will be like to work with.