Can we have CSS for Cursor?

What I really want is CSS for my copilot-powered IDE. Cascading rulesets that target files based on globs, or scenarios (ie. before an npm install, after a failed test, when working in legacy-code/**/*.xml ).

Cursor has adopted an mdc file as a format to help address this. While I don't see much in the docs, there are forum posts which aim to clarify what it is and how it works.

The format is a markdown file with front-matter that defines when the ruleset should be considered.

However, the conventions and behavior seem unpredictable currently.

Getting this right is going to unlock a lot of power.

I just between multiple client's legacy code bases, and help onboard developers to them as well.

If the ruleset for working with the codebase lived as both human and AI readable documentation, this would breathe new life into legacy codebases and the [[devex]] of working within them.