Run /insights and you see a token breakdown by category: system prompt, MCP overhead, memory files, and conversation history. You see exactly where context is going.
/statusline puts live context health in the status bar. You can customize what it shows.
I recommend opening a new session at context. At , you're paying for every message just to carry dead history. Without this visibility, you hit the context wall without warning and the session degrades silently, with no signal that responses are getting worse.