I'd like to have code coloration (& in extension code folding, etc.) for JSON5, which is not backwards-compatible with standard JSON.
Hi, as long as nobody contributes a highlighting, nothing will happen. We have good documentation on https://invent.kde.org/frameworks/syntax-highlighting/-/blob/master/README.md to get somebody started. Beside this, one can always reach out on the channels described on https://kate-editor.org/support/