Keeps a private record of what the developer and Claude have agreed in this session (requirements in the developer's own words, assumptions, open questions, suggestions and what-ifs that weren't agreed, and what has been built) and reads every new message against it, so a question doesn't become an instruction and a correction doesn't erase other requirements. Knackpack's session-start hook loads it automatically; run it yourself only where hooks are blocked, or to see the agreement, continue earlier work, or stop tracking.