the author of the site makes no secret that the website is vibecoded. You're unfairly extrapolating that the product itself is vibe-coded (hard to do unless he is a time-traveller). And you're missing the point of the unique advantages that L offers wrt computation on compressed data.
Fair enough. Without seeing the code itself, one can only judge the book by its cover. I'm interested, but maybe not quite the target audience.
yup website is Claude Design for prototype. For the core ... AI has been less helpful than I hoped - I believe largely because array style languages have so little source in training? But where Claude was especially helpful (other than the web design w/ Claude Design for the prototype) was analyzing ASM output of functions and optimizing those (although it was hard to go ASM>C or ASM>rust). E.g. lots of small mistakes would have been missed by not having restrict/const in places. Claude was great at compile all functions, analyze ASM, suggest optimized ASM (and ASM2vec was helpful as well for finding any "similar" code paths that could be combined (e.g. var/dev/cov are just moments)