Why Vercel throws invalid vercel.json error when using JSONC comments

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Of my experience with VSCode, most applications that use JSON for configurations have support for JSONC (JSON with Comments).

Attempting to use comments in vercel.json throws an error on build:

Error: Invalid vercel.json file provided

I’d like support for comments in vercel.json so that something like this is valid:

{
  "$schema": "https://openapi.vercel.sh/vercel.json",

  // commands
  "buildCommand": "npm run build",
  "installCommand": "npm ci", // NOT "npm install"

  // server
  "framework": "express",
  "trailingSlash": false
}

It’d also be a nice bonus to allow for trailing commas!

While I could use a TypeScript file to include these syntax features, I prefer JSON for any top-level configuration files, and support for this syntax would be an appreciable addition.

If there is something I’m missing regarding this feature request—if JSONC is supported to an extent—I’d appreciate a heads-up.