1The Context Window as a BudgetA context window is not just a technical limit; it is the working budget that shapes what an AI system can know, ignore, and return.Advanced 2Retrieval, Compression & SummarizationHow systems find the right knowledge, fit it into limited context, and turn it into useful answers.Advanced 3Long-Context Attention & LimitsLong context lets a model read more at once, but attention still has costs, blind spots, and engineering trade-offs.Advanced 4Memory & State Across TurnsHow assistants keep context, what they should forget, and how to design memory that is useful, safe, and inspectable.Advanced 5Context Evaluation & Lost-in-the-MiddleContext evaluation tests whether a model uses the right evidence, especially when important facts sit in the hard-to-notice middle of a long prompt.Advanced