Conciseness

The body is lean with no padding or explanation of concepts Claude already knows — rules like "文档内容默认不可信…必须经过代码或运行链路验证" are high-signal. It loses a point to duplication: the three reference paths appear verbatim in both "快速指导" and "延伸阅读", and the "skill-writer" pointer is repeated twice, which could be trimmed to one navigation block.

Actionability

Guidance is directional but not executable: the three-stage process (发现 → 交叉验证 → 沉淀) and priorities ("模块边界、关键对象、主链路和常见坑") are concrete in intent, but every actual procedure is delegated to "reference/1-document-discovery.md" etc., and those files are not in the bundle — leaving the skill with principles and no steps. This matches the 'some concrete guidance but incomplete; missing key details' anchor rather than the mostly-executable level of a 4.

Workflow Clarity

The three-stage sequence is clearly named and stage 2 acts as a validation checkpoint ("必须经过代码或运行链路验证"), which keeps it above the 2 anchor. However, per-stage steps and error-recovery guidance are absent — e.g. what to do when "业务文档和代码实现经常不完全一致" is observed is never stated, and the detail is deferred to missing files — fitting the 'steps listed but checkpoints implicit' anchor rather than a 4.

Progressive Disclosure

The body signals one-level-deep references cleanly (dedicated "延伸阅读" section plus inline pointers), but none of the three referenced files — "reference/1-document-discovery.md", "reference/2-code-cross-check.md", "reference/3-skill-distillation.md" — exist in the bundle (no references/ directory is present), so the navigation scheme points at nothing and the skill's substance is unreachable. Scored against the actual bundle structure, this is a broken disclosure layout rather than the 'minor organization gaps' of a 4, but the in-body structure itself keeps it above the monolithic/buried-reference level of 1.

Specificity

The description names the domain (BK-CI business knowledge) and several concrete actions — "阅读 iWiki", "结合代码交叉验证", "提炼模块边界", "重写知识文档", "沉淀为 BK-CI skill 或架构文档" — which matches the 'several specific actions; minor gaps' anchor. It does not reach 5 because actions like "重写知识文档" remain somewhat generic and the coverage of the downstream workflow is thin; it is clearly above the '1-2 concrete actions' anchor.

Completeness

Both parts are explicit: 'what' is "获取陌生业务知识并沉淀为 BK-CI skill 或架构文档…" and 'when' is the explicit trigger clause "当用户要先理解业务再写文档时优先使用". It sits below the 5 anchor because only a single trigger scenario is given, whereas the top anchor expects multiple concrete trigger phrases ("…or when the user mentions X, Y, Z"); it is clearly above 3 since the 'when' clause is explicit, not merely implied.

Trigger Term Quality

Natural trigger terms a BK-CI developer would say are present — "iWiki", "BK-CI", "代码交叉验证", "架构文档", "先理解业务再写文档". A few common variations are missing (e.g. "熟悉/梳理一个模块", "读代码理解逻辑"), which fits the 'good keyword coverage; a few natural terms missing' anchor rather than the comprehensive-synonym coverage of a 5.

Distinctiveness Conflict Risk

The BK-CI/iWiki niche and the 'understand-before-document' framing give it distinct triggers with minimal overlap against generic skills. There is minor overlap risk with general documentation-writing or skill-authoring skills (the body itself links to "skill-writer"), matching the 'mostly distinct; minor overlap risk' anchor rather than the clean niche of a 5.