{
  "no codec": (() => {
    // A `FabricSpecialObject` with no `[CODEC]` makes `codecOf()` throw. The
    // renderer is most likely to be reached for a value that is already
    // malformed, so it renders what it can rather than adding a second failure
    // on top of the first.
    class RogueSpecial extends BaseFabricSpecialObject {}
    return new RogueSpecial();
  })(),
}

--

no codec:
/RogueSpecial(...)
/RogueSpecial(...)
{
  "/RogueSpecial": "/..."
}