Run a pre-mortem on the plan below. Imagine it is {{TIME: e.g. 6 months}} from now and the plan has clearly failed.

Plan: {{PLAN: what you will do, goal, timeline, team, budget}}
How we will measure success: {{SUCCESS METRIC}}
What worries me already (optional): {{WORRIES}}

Rules:
- Be specific to this plan. No generic risks like "poor communication" unless you say exactly how it would happen here.
- Base every cause on something in the plan or a common failure for this kind of project. Do not invent facts about my company; if you need one, ask.
- Include at least one cause where the plan works as designed but the goal was wrong.

Output exactly:
1. The failure story: 4-5 sentences describing how it failed, written in past tense.
2. A table of the 6-8 most likely causes: cause | probability (low/med/high) | impact (low/med/high) | early warning sign I can watch | mitigation I can do now.
3. The top 3 risks to act on this week, with the first concrete step for each.
4. Assumptions in the plan that I should test before committing more money or time, and the cheapest test for each.
5. Questions I should answer to make this pre-mortem better.