Yeah, I tried various very sane-looking instrucions file when starting to use copilot 6 months ago. Turned out it was not really useful. It mostly follows the rules anyway, but it also often forgot to. So turns out, especially with the fast turnaround with models today, it was better to just forego these instructions files.

It is kind of alright, I use mostly on VS when coding C# or C++, for code completions, error analysis, check code quality and such.

As agent, or writing everything for me, not yet.