This sounds like what would happen if I built a new javascript library, but instead of publishing source code, I just wrote blog post describing how to build it

This sounds like what would happen if I built a new javascript library, but instead of publishing source code, I just wrote blog post describing how to build it again in natural language. I've never been in a lab or witnessed one of these experiments, but wouldn't it be great if you could write up a set of instructions and feed that into a machine anywhere in the world.