Mary Rose Cook is a programmer with.. just.. so many side projects, oh my — and, she works at Airtable. Mary created Gitlet, a version of Git in 1000 lines of JavaScript with extensive annotation. That might be her most well-known project, but of particular interest to our community are her programming environments Isla and Code Lauren. These projects explore syntax, learnability, execution visualization, and other surfaces of the development experience that I think we all would love to see reinvented. Mary and I talk about the design decisions behind these projects, naturally. But more importantly, we look at the ways they failed to achieve the goals Mary had for them, and what we should all be mindful of on our investigations into the future of computing. The discussion also touches on the theme of "escape hatches", picks up a few lessons in UI design from the video games Into The Breach and The Witness, and reflects on what people think programming is like before they actually learn what it really is. Lighthearted but full of wisdom.

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