Conciseness

The body is code-first and dense, explaining nothing Claude already knows; every section carries domain-specific rules (bidirectional pairs, block-not-pass on missing weight, non-dismissable critical alerts). It is not 5 because the 'When to Use' section duplicates the description's trigger list and ~60-line full function bodies are inlined where tighter signatures plus behavioral rules would suffice. It is well above 3 because there is no concept re-teaching or filler prose.

Actionability

Concrete TypeScript interfaces, implementations, a testing scaffold, and examples with expected outputs ('{ total: 13, risk: "high", … }') make the guidance mostly executable. It is not 5 because the functions depend on undefined helpers and data sources (getDoseRules, findInteraction, severityOrder, INTERACTION_PAIRS) and the NEWS2 scoring tables are pointed at ('must match the Royal College of Physicians specification exactly') rather than provided — key details for a copy-paste implementation. It is not 3 because the code is concrete and near-complete rather than pseudocode.

Workflow Clarity

The architecture diagram plus the three-module breakdown plus the testing section give a clear sequence with an explicit validation checkpoint ('Pass criteria: 100%. A single missed interaction is a patient safety event') and bidirectional test cases. It is not 5 because there is no error-recovery or fix-and-revalidate loop described for when tests fail, and no step-by-step build order for the data layer the code assumes.

Progressive Disclosure

No bundle files exist (references/, scripts/, assets/ are absent), and the ~240-line SKILL.md inlines full function implementations, interaction-pair data-model spec, and alert tables that would more naturally live in reference files. Sections are clearly organized, placing it above anchor 2, but there are no one-level-deep references or navigation pointers to separate detail, so it does not reach anchor 4.

Specificity

The description lists multiple concrete actions — 'Drug interaction checking, dose validation, clinical scoring (NEWS2, qSOFA), alert severity classification, and integration into EMR workflows' — in third person, with comprehensive coverage of the skill's scope. It is not score 4 because there are no meaningful gaps in coverage relative to what the skill does.

Completeness

Both questions are explicitly answered: the 'what' is the five concrete capability areas, and the 'when' is the explicit 'Use when building clinical decision support — drug interaction checks, dose validation, clinical scoring, or alert severity' clause with concrete trigger phrases. This matches the anchor-5 pattern exactly; not 4 because the 'when' is fully explicit rather than merely present.

Trigger Term Quality

'Use when building clinical decision support — drug interaction checks, dose validation, clinical scoring, or alert severity' provides good natural trigger phrases a clinical developer would say. It falls short of 5 because coverage lacks common synonyms such as 'prescription', 'medication order', 'drug safety', or 'early warning score'; the when-clause mostly restates the what-list rather than broadening it.

Distinctiveness Conflict Risk

The clinical decision support / EMR domain with named systems (NEWS2, qSOFA, CDSS) is a clear niche with distinct triggers and minimal overlap risk with generic healthcare or general coding skills. Not 4 because no closely related skill's triggers are likely to collide with these terms.