It’s an implementation of ODK[1] extensions to the XForms specification[2]. The specific implementation is Enketo[3], which I was brought on to ODK to help maintain. Not exactly the spec I’d go with greenfield, but it’s been successfully in use for a decade with great impact. 1: https://getodk.org/ 2: https://getodk.github.io/xforms-spec/ 3: https://enketo.org/. - Source: Hacker News / about 2 years ago

Start with the playbook: https://playbook.samaltman.com/ HN0 will discourage you but eh, running my own business is the most fun (and work) I've ever had in my life. Some people have to do that Eurotrip. Some have to get into Harvard. Some want kids. And some just need to start a business. - Source: Hacker News / 11 months ago

Sam Altman - The idea can seem stupid to virtually everyone as long as it excites a few people. Source: about 1 year ago

Early-stage Startup Playbook by Sam Altman - provides a guide for new startups on how to create a product that users will love. The playbook emphasizes the importance of focusing on user satisfaction and offers advice on building a product that early users will enjoy enough to recommend to others. Source: about 1 year ago

Prefer Podcasts? Sam Altman, one of the most famous people in Silicon Valley and former head of Y Combinator, created an amazing podacst series called [Startup Playbook](https://playbook.samaltman.com/). Source: over 1 year ago

Here's a place to start: https://playbook.samaltman.com/. Source: over 1 year ago