Conciseness

The body is a lean ~15-line workflow with zero padding: it never explains what WxJava or WeChat APIs are, and each line adds non-obvious direction (e.g., '按最低成本、最可验证的顺序', '遮蔽 secret、token、私钥'). Every token earns its place, matching the 5 anchor rather than the 4's 'minor instances of over-explanation'.

Actionability

Guidance is concrete — named artifacts to collect ('依赖树、异常堆栈、请求 ID 与脱敏后的配置形状'), a fault taxonomy, and exact check items ('编码、字段排序、金额精度、时间戳、证书链和重放保护') — but the actual executable commands (e.g., 'mvn dependency:tree') live only in the reference file, leaving minor gaps versus the fully executable 5. It is clearly above the 3 anchor's pseudocode/incomplete level; per the rubric's code-vs-instruction note, the absence of code is not itself penalized.

Workflow Clarity

A clear 5-step sequence with an explicit feedback loop: step 4 requires one verifiable root cause with '最小修复、预期现象和回归验证动作', and the closing paragraph mandates '区分已证实结论与待验证假设' plus re-checking current implementations before applying historical fixes. Not a destructive/batch operation, so no cap applies; this matches the 5 anchor's validation steps and error-recovery loop.

Progressive Disclosure

The SKILL.md is a concise overview whose only deep content is correctly split into a single, clearly signaled, one-level reference — '[诊断清单](references/diagnostics.md)' — which exists on disk and does not itself nest further skill files. This matches the 5 anchor (and the under-50-lines simple-skill allowance) rather than the 4's minor organization gaps.

Specificity

The description enumerates many concrete problem areas — '配置初始化、access token、签名验签、支付证书、回调通知、序列化、网络请求和多账号隔离' — but every one is covered by a single verb ('排查'), so it lists several specific capabilities with a minor coverage gap rather than the multiple distinct actions of a 5 ('排查…问题' is one action applied across topics). It is well above a 3, which would name the domain with only 1–2 concrete actions.

Completeness

Both what and when are explicit: '排查 WxJava 在…方面的问题' answers what, and '适用于用户提供异常、日志、请求响应或“WxJava 为什么不能调用”的场景' is an explicit use-when clause with concrete trigger phrases. It clearly matches the 5 anchor; a 4 would have a weaker or less specific 'when'.

Trigger Term Quality

Natural user phrasings are present: '异常', '日志', '请求响应', and especially the quoted "WxJava 为什么不能调用", plus technical keywords like 'access token'. A few natural terms are missing (e.g., '微信', 'wx-java', 'weixin-java-sdk', 'Spring Boot 集成'), so it matches 'good keyword coverage; a few natural terms missing' rather than the comprehensive synonym/extension coverage of a 5.

Distinctiveness Conflict Risk

It is anchored to a named niche library (WxJava) with distinctive failure-mode triggers (pay certs, callback sign verification, multi-account isolation), giving a clear niche with minimal conflict risk — matching the 5 anchor rather than the 4's 'minor overlap risk with closely related skills'.