Conciseness

The body is a lean router with no explanations of concepts Claude already knows, but the dot Decision Tree duplicates the Quick Reference table's task-to-file mapping almost entirely, and the bolded 'You MUST use this skill for ANY...' line restates the frontmatter description. Mostly efficient but could be tightened by cutting one of the duplicated mappings.

Actionability

Concrete, specific pointers throughout: per-symptom file references ('See skills/queries.md'), exact WWDC session IDs, and doc paths. Minor gap: no guidance on how to resolve the relative 'skills/' paths to the actual suite location.

Workflow Clarity

The decision tree gives a clear task-to-reference sequence, and conflict-resolution sections specify explicit ordering ('start with axiom-health for session lifecycle, then axiom-watchos for presentation'). No validation checkpoints are needed since the skill routes rather than mutates anything; minor gap in that lookup paths for the routed files are unstated.

Progressive Disclosure

Anchor-5 structure — a concise overview with well-signaled, one-level-deep references organized by symptom — but the eight referenced 'skills/*.md' files are not present in the provided bundle (no references/, scripts/, or assets/ directories exist), so the navigation cannot be verified as real. Structure is clearly above anchor 3; unverifiable reference targets keep it below 5.

Specificity

Names the domain plus several specific areas ('permissions, queries, background delivery, custom workouts, multidevice coordination'), but these are topics introduced by 'Covers' rather than concrete actions like authorizing access or building workout sessions, matching anchor 3 better than anchor 4.

Completeness

The 'when' is explicit with concrete triggers ('Use when working with HealthKit, WorkoutKit, health data, workouts, or fitness features on iOS or watchOS') and the 'what' is present ('Covers permissions, queries, background delivery, custom workouts, multidevice coordination'), but the what is a topic list rather than a clear capability statement. Anchor 5 would require both to be concretely explicit.

Trigger Term Quality

'HealthKit, WorkoutKit, health data, workouts, or fitness features on iOS or watchOS' gives good natural keyword coverage a user would actually say, though common synonyms like 'Apple Watch', 'Apple Health', or 'heart rate' are missing. Not 5 because synonym coverage is incomplete; not 3 because far more than some relevant keywords are present.

Distinctiveness Conflict Risk

Framework names (HealthKit, WorkoutKit) carve a clear niche with distinct triggers, but 'health data, workouts, or fitness features' leaves minor overlap risk with watchOS or general fitness skills. Not 5 because of that residual overlap; well above anchor 3's 'could still overlap with similar skills'.