### Describe the feature or problem you'd like to solve There is no way to give system level instructions to Copilot-CLI outside of repo specific instruction files. ### Proposed solution Add a `--system-prompt` parameter for copilot-cli to pass system level instruction directly on top of the repo level instruction files. ### Example prompts or workflows `copilot -p "make so cool stuff" --system-prompt "extra instruction on making cool stuff"` ### Additional context _No response_