The tutor is intelligent!

I ran across an idea for my proposed curriculum. It involves the use of an "intelligent tutor" concept in the programming of the curriculum. Basically, it uses a computer program to perform the processes and steps of an individually prescribed, self-paced programmed text environment. It begins by assessing the learner's current knowledge on the target subject, which is built around a frontend analysis of the system being taught. The learner's current knowledge is compared against the expected final outcomes of the training and then an instructional prescription is formulated by the program to guide the learner through the branches. Gaps can be filled first and then the learner can be sequenced from the lowest point of continuous need. My question at this point is "Are there any authoring tools out there that can build this type of system, or must this be done from scratch in a programming language?" I'll find out.