Wow, thanks for digging! Looks like I haven't committed that file! It's an incomplete description of the android app that I wrote to output the jsonl in the self-logging piece going through some comparisons of existing options in 2019 and design decisions for the app. In short, it's like myfitnesspal tailored to my use case. 3 years later, the data is still a sprawl, but the logging strategy is stable.