The point is that the model has the source code in its weights. Therefore it's misleading to focus on being "only given the documentation", when it could produce a SQLite implementation in rust with no documentation at all. The wording is designed to create a marketing impression that it can do spec-driven development for a novel project, but this example doesn't actually support that.

It's like a diet system advertising how much weight a spokesperson lost on their system, without disclosing that they also went on Ozempic at the same time.