I made a deliberate point of finalizing the instrumentation plan before the visual design was fully locked, specifically so the definition of success could not quietly drift into something easier to hit, like counting button clicks, once the pressure to show progress arrived. The primary success metric for this feature is not the click rate on the call to action button. It is the time between a client opening the report and the client actually sharing their Brain link. A client can click a call to action and still stall afterward, so a click alone tells you very little about whether the underlying anxiety was actually resolved. Everything else we planned to track, whether the report was opened at all, how long a client spent before clicking anything, and which branch of the flow a given client ended up on, is diagnostic information that helps explain the outcome, not a substitute for the outcome itself.