Context Engineering
Deciding what information goes into the context window, in what order, and what gets left out.
Context engineering is the discipline that grew up around prompting once context windows got large: with room for hundreds of pages, the question stops being ‘what do I say’ and becomes ‘what does the model actually need’. Irrelevant context measurably degrades output, so curation beats stuffing.
In practice: Retrieving three relevant sections instead of pasting the whole 200-page manual.