I'm convinced context windows are a marketing lie. Spent 3 hours begging Cursor to follow ONE simple instruction. Had to ask it 5 times and see how it says 'I understand' and makes EXACTLY WHAT I ASKED NOT TO DO.

I was working on a .NET task (relying on the agent heavily). I gave Cursor a dead-simple negative constraint in the **same prompt: "**Use ONLY git commit -m 'message'. DO NOT add trailers, Co-authored-by, or metadata."  
  
All I wanted was one thing: **Clean git commits.** I had to repeat myself 5 times. It wasn't even about the model "forgetting" over time actually—agent just straight up ignored the rule **IN THE VERY TURN** it was executing. It literally looked at my command, said "I understand," and then proceeded to ship a commit message with 5 lines of trailers I asked not to add.

Why is this happening? It feels like the more instructions you give (I had about 30 lines of project logic), the more the model's attention drifts toward its training data. It defaults to "standard" GitHub patterns because it’s more "comfortable" for the weights of the model than actually listening to the user.  
  
I had to manually fix the commits.  
  
Bruh.