You already have the signal

Three papers this week and the same thing wrong with all of them, which is not usually how a week goes. None of them is about a better model. Every one is about a signal that already exists inside a system we built, sitting there unread, while the system spends real money re-deriving it or actively throws it away. Nobody wrote down what was still true This week's pick, and it's the one I'd act on first because it is almost embarrassingly cheap. A coding agent's context is an append-only log. I ran this, I saw that. What it is emphatically not is a description of your repository. The agent reads a file at turn 12. It patches that same file at turn 30. Those two facts now sit hundreds of lines apart in a transcript that also holds every failed command and every stack trace, and nothing anywhere marks the first one as expired. So before every single action the model has to notice the collision and draw the conclusion itself. Silently. Every turn. When it gets that wrong you get one of…