Hai TDD is a well-structured skill that guides agents through strict red-green-refactor TDD cycles. The SKILL.md is clearly written with specific triggers in both English and Chinese, a detailed workflow, and quality bar guidelines. No scripts are included — it's purely instructional. The skill references external skills (hai-goal, hai-architecture, hai-naming) and an output template that isn't bundled, which limits standalone usability.
Pure instructional skill with no scripts and no security concerns. Well-written and opinionated in a good way — clear about what TDD is and isn't. Deductions: no bundled scripts or output template, relies on external companion skills, Chinese translation reference adds bulk without value for non-Chinese users.