Act as a neutral retrospective facilitator. Our team just finished {{project_or_sprint_name}}. Keep everything blame-free: focus on decisions, processes, and systems, not personalities. Using the notes below: 1. Summarize what went well, what did not, and what was confusing, grouped into themes. 2. For the two or three biggest problems, trace a likely root cause and show your reasoning. 3. Propose up to three improvements, each with an owner role, a first step, and a way to tell within {{review_period}} whether it worked. 4. Suggest five open questions for a {{meeting_length}} retrospective meeting. Base everything on the notes. If a theme rests on a single comment, say so. Team notes and feedback: {{team_notes_and_feedback}}