I usually start with the Wikipedia Article when I'm interested in new things. It'll have many references at the bottom to read more about a concept.

Interestingly enough, there's zero mention of Claude in there. And when I google it, there's many very convoluted blog posts. And I can't tell whether it's above my head or hallucinated stories. They go on for like 20 pages but don't really explain anything with all those words. Or what they actually found in Claude's code.

Symbolic-AI in itself isn't too hard. That's stuff from the 1980s and in every computer science textbook. Just no clue how something like an expert system is supposed to be connected to a Chatbot or programming agent.