My GitHub Copilot Sessions Kept Degrading -- So I Built a Skill to Fix It

You've probably experienced this. You're 30 minutes into a productive Copilot agent session, things are flowing well -- and then something shifts. The agent asks you to clarify something it already knows. It repeats a question from earlier. The quality of the output quietly drops. You didn't change anything. What happened? Context ran out. Every Copilot session has a fixed token budget. Once that budget fills up, the model starts compressing or dropping older context. The result isn't an error m