Read the specified design doc section.

Identify:
1. The 3 weakest assumptions in this design
2. What breaks first in production under load?
3. Most likely edge case discovered during implementation?
4. What dependency change would invalidate this design?
5. Strongest argument AGAINST implementing this?

Rate each finding:
- Likelihood: high / medium / low
- Impact if it occurs: high / medium / low
- Mitigation cost: trivial / moderate / expensive

Output as a structured risk assessment.
