A horrible workaround I use is a blank redundant key and a leading // in my string to draw my eye to it. This only preserves the last comment in my python dictionary but I only use comments to work in the json file.

    {
        “”:”// comment here”,
        “Entry”:[-1,0,2],
        “”:”// next comment”,
        “Flag”:true
    }

And trailing commas on final list elements and object properties.

JSONC is exactly that, JSON with comments. Works fine, eg typescript’s tsconfig file is JSONC and I’ve yet to find a problem with it.