The body is lean — a short persona line plus five numbered directives and a categorized resource map — with no padding or explanation of concepts Claude already knows, so every token earns its place.

Directives are concrete with specific examples ("追问实际落地细节：覆盖率数据、脚本维护成本、CI 集成方式"; "针对具体功能（如登录/支付/电商直播间）现场设计测试用例"); for an instruction-only skill this is actionable guidance, so the absence of code is not penalized.

This is a simple single-task skill under 50 lines with a clear numbered sequence; it involves no destructive or batch operations that would require validation feedback loops, so the sequence qualifies for a 3.

The Additional Resources section is well-signaled and one-level-deep with a category→file mapping, but the referenced files (test-development.md, java.md, python-basic.md) are not present in the bundle (no references/ directory), so navigation is broken, which holds this below a 3.

The description names the domain and enumerates coverage areas ("覆盖测试基础、用例设计、自动化测试、性能测试与安全测试"), but it is topic-listing under a single verb rather than concrete actions, matching the 2-anchor "Names domain and some actions" rather than the multi-verb 3-anchor.

It states what the skill covers but lacks any explicit "Use when…" trigger clause, so per the guidelines completeness is capped at 2 ("Has what, but when is missing or only implied").

It surfaces natural domain terms a user would say — 用例设计, 自动化测试, 性能测试, 安全测试 — giving good coverage of the test-development vocabulary rather than jargon.

The niche — test-development interview question-setting — is specific and unlikely to trigger for unrelated skills, matching the 3-anchor clear-niche case.