The new mental model actually is (1) skills based model, i.e. https://agentskills.io/home, and (2) where the LLM agents "see all problems as coding problems". Skills are a bunch of detailed Markdowns and corresponding code libraries and snippets. The mental model thereby loops as follows: read only the top level descriptions in each SKILL.md, use those in-context to decide which skill to pick, after picking the relevant skill read the skill in-depth to choose which code/lib to use, based on the <problem, code/lib> generate new code, execute the code, evaluate, repeat. The problem-as-a-code mental model is also a great way of evaluating, and creating rewards and guarantees.