On a very basic level, it is indeed a description/definition of what your resulting code is supposed to do. The chap’s proposal is basically let ai read the spec and build the software. Tomorrow you find out it’s missing something so you only adapt the spec and let the ai build it from scratch. Now, it doesn’t take too much imagination to see where this can and absolutely will go wrong, and especially in what unknown and very interesting ways especially.
On a very basic level, it is indeed a description/definition of what your resulting code is supposed to do. The chap’s proposal is basically let ai read the spec and build the software. Tomorrow you find out it’s missing something so you only adapt the spec and let the ai build it from scratch. Now, it doesn’t take too much imagination to see where this can and absolutely will go wrong, and especially in what unknown and very interesting ways especially.