I've been trying to get a custom system_prompt to be set when calling the open(config) command. It seems like it should work since I have gotten it to work when calling ask("my prompt", config)

Reproducible Example

require("CopilotChat").open({
	system_prompt = "You are a pirate. Speak in pirate slang.",
})

Example where it works with ask(...)

require("CopilotChat").ask(
	"Do you have any custom instructions?",
	{ system_prompt = "You are a pirate. Speak in pirate slang." }
)