The body is lean ('优先结合候选人简历和项目经历提问', '避免一次性给提示词') with no explanations of concepts Claude already knows; every line is actionable instruction. It is not a 2 because there is no padding or unnecessary explanation to tighten.

Concrete sequencing ('使用经验 -> 原理机制 -> 边界条件 -> 优化与故障') and specific追问 targets ('实现细节、失败场景、回滚方案') give precise, executable guidance. As a code-free instruction skill this matches the score-3 anchor for concrete, specific guidance; it is not a 2 because the directions are complete rather than vague or pseudocode-like.

The questioning workflow is clearly sequenced with an explicit order and per-question追问 requirements; this non-destructive, instruction-only task does not require a validate/retry feedback loop. It is not a 2 because the sequence and checkpoints (each主问题 must be追问able, must probe细节/失败/回滚) are explicit rather than implicit.

References are organized one-level-deep and clearly signaled by category ('JAVA -> java.md', 'MYSQL -> mysql.md', etc.), but the referenced bundle files (java.md, mysql.md, redis.md, spring.md, system-design-scenarios.md) are not present in any references/ directory. It is not a 3 because the referenced materials cannot be verified to exist and navigated, and not a 1 because the inline structure and signaling are reasonable.

Quotes 'Java 后端面试出题', 'Java 核心、MySQL、Redis、Spring', and '追问设计取舍、故障处理和性能优化' name multiple concrete actions and a specific domain, matching the score-3 anchor for listing several specific actions. It is not a 2 because it goes beyond naming only a domain and a few actions into enumerating concrete questioning activities.

The 'what' is clearly stated ('面试出题...追问设计取舍、故障处理和性能优化'), but the 'when' is only implied with no explicit 'Use when...' trigger clause, which per the judging guidelines caps completeness at 2. It is not a 3 because there is no explicit trigger guidance, and not a 1 because the capability description is concrete.

Natural terms like 'Java 后端面试', 'MySQL', 'Redis', and 'Spring' appear, but coverage of phrasings a user would actually say is incomplete (no '面试题'/'模拟面试'/'后端八股' variants) and there is no explicit 'Use when' framing. It is not a 3 because common natural variations are missing, and not a 1 because several genuinely user-utterable keywords are present.

The combination 'Java 后端面试' scoped to Java core/MySQL/Redis/Spring is a clear niche with distinct triggers unlikely to conflict with other skills. It is not a 2 because the domain and scope are specific enough to avoid meaningful overlap.