That's fair. Copilot Chat is surely way ahead. As a student, I built this to see if I could create a more 'focused' onboarding experience - maybe even have step by step tour of the codebase, for an organisation. Something specifically that could live outside the IDE for non-technical stakeholders or for generating documentations/summaries that Copilot doesn't prioritise.
Technically, this application is something which I would want to show to my manager at my internship so that for their future interns, they wouldn't have to take so much load and the new interns would just refer to this rapid support.
As a demo project, I think there still can be lots to change, including the managers' references and which code is editable and which is not, etc.
I'm curious: Are there things you find annoying about the Copilot integration? A lightweight, standalone tool could solve something better than the giant and costly Copilot?