Makes the MCC choice-filling list match your planner in one click, or brings MCC's list into the planner. You sign in to MCC yourself, save with the OTP yourself, and it never locks.
Unzip the download into a folder. manifest.json sits directly inside it.
Open chrome://extensions in a new tab and turn on Developer mode.
Press Load unpacked and pick that folder, the one holding manifest.json.
Reload the planner. Your plan now syncs to the extension by itself.
Sign in to MCC and open Choice Filling. The panel in the bottom-right corner shows In sync or the differences, with Plan → MCC and MCC → Plan whenever they differ. Each makes one side an exact copy of the other.