Add self-update instruction to CONTEXT.md

CONTEXT.md

@@ -4,6 +4,20 @@ Paste this at the start of any new conversation to restore full context.
 
 ---
 
+## Instructions for Claude
+
+When you read this file, you are fully caught up on the bot's logic,
+strategy, and current state. Do not ask questions already answered here.
+
+**IMPORTANT — keep this file current:**
+At the end of any conversation where a major change, new feature, or
+significant decision was made, update this CONTEXT.md to reflect it.
+Provide the updated file for George to commit alongside the code changes.
+A good rule of thumb: if it would be confusing to a future Claude reading
+this cold, update it.
+
+---
+
 ## Git repository
 
 - Gitea: `http://minimax.lan:3000/george/maxbot.git`