Would you be willing to expand on what you mean by disclosure being a big part of open source?
I ask because it has not been my experience that OSS developers have ever had a habit of disclosing what tools they use. If you are lucky then a repo has instructions for contributors, that may describe tools being used, or CI configuration for running tests and linters, but most projects have neither. Mostly you just get instructions for building the project, but sometimes not even that

