Pause and critically reflect on the direction of the current conversation. Use this whenever the user says 'take a step back,' 'let's zoom out,' 'are we sure about this,' 'wait — am I missing something,' 'sanity check this,' 'pressure test this,' 'are we going down the wrong path,' or expresses doubt about where the discussion has gone. Also use proactively if you notice the conversation has accumulated assumptions that haven't been examined, or has drifted from the user's original goal. Output is a structured reflection — original goal, path taken, assumptions made, what might be wrong, and a recommendation.