Docs and Context

The model was trained on a slice of the past. Fast-moving libraries — Next.js, Tailwind, Anthropic's own API — change APIs, rename flags, and deprecate patterns after that slice. The agent, confidently, writes the code against the version it learned, and you only find out when it breaks. The fix isn't hoping the model guesses better: it's putting the current documentation for the version you actually use within its reach.