In the interest of getting off our first-party JSON parsing implementation in fromjson, we should change the numerous places in our code where we define a JSON-like string literal (or construct a JSON-like string using inputs that are readily expressible in JSON-friendly ways) and pass it into fromjson. In these cases, we often leverage features of the JSON-like spec supported by fromjson. We should convert these to standard JSON so that they can be parsed by a third-party JSON parser.

Either find a way to automate this process, or fan out and schedule work for each team to apply this change to the code they own.