Wrt your guild-proposal specifically, one concrete outcome I'd like to see is accreditation, something similar like certification exams administered by society

Wrt your guild-proposal specifically, one concrete outcome I'd like to see is accreditation, something similar like certification exams administered by society of actuarians. High bar standardized exam on fundamentals of CompSci, which waives every whiteboarding/leetcode interview. It sort of exists today, if you have a CompSci degree from reputable college, but this way people can get the certificate without the formal education, just pass the exam. It's ok if it's difficult.