TODO: Week 1 & Week 2

- [ ] 完成各个模块的test函数，并通过测试验证；截止时间 2026.2.3。
- [ ] Understanding
- [ ] Search
- [x] Judge
- [x] Reflect
- [ ] 完成初版Crux系统，每个模块包含完整的逻辑实现，常规测试问题效果满意度 > 70%; 截止时间 2026.2.13。
- [ ] 数据集构造
- [ ] Test代码
- [ ] 评估

Start by mapping the Week 1 and Week 2 checklist to the Understanding, Search, Judge, and Reflect modules, then inspect the repository to locate their implementations and tests. Completion means all module tests pass, dataset construction, test code, and evaluation are covered, and the initial Crux system achieves the stated satisfaction target above 70%.

Written by the indexing model from the issue text.