Conciseness

The body is efficient — terse when-to-use guidance plus complete code per pattern, with no padding explaining concepts Claude already knows. However, the Common Mistakes list duplicates several Review Checklist items (e.g., mistakes 4/5 mirror checklist lines), and the intro boundary bullets restate checklist items 9–10, so minor trimming is possible. This lands on anchor 4 ('minor instances that could be trimmed') rather than anchor 5's 'every token earns its place'.

Actionability

Every section ships complete, copy-paste-ready, executable Swift: the LoginView @FocusState/onSubmit flow, .defaultFocus sidebar, focusedSceneValue recipe binding, .focusable(interactions: .activate) card, focusSection() layout, sheet-dismiss focus restoration, and a fully constrained UIFocusGuide. Specific examples cover the common cases, matching anchor 5.

Workflow Clarity

As a single-purpose pattern skill it needs no multi-step pipeline, and its guidance is unambiguous: each pattern states when to use it ("Use focus sections … when default left/right or up/down movement skips the intended group"), mistake 6 gives an explicit escalation order (layout grouping → focusSection() → UIFocusGuide), and the Review Checklist acts as a validation checkpoint. Under the simple-skill exception this earns 5; there are no destructive or batch operations requiring additional feedback loops.

Progressive Disclosure

The body is a clear overview: core SwiftUI/UIKit patterns inline, with three well-labeled one-level-deep references (focus-patterns.md, multi-platform-focus.md, focus-debugging.md), all verified to exist with no nested references. A Contents TOC aids navigation, and platform-specific detail is appropriately split into the references, matching anchor 5.

Specificity

The description enumerates many concrete, API-named capabilities — "managing @FocusState, defaultFocus, focused values, focusable interactions, focus sections", "custom focus routing with UIFocusGuide", "debugging focus with UIFocusDebugger" — with comprehensive platform coverage (tvOS, watchOS, visionOS, macOS). This matches the anchor for multiple specific concrete actions with comprehensive coverage; the gaps are too minor for anchor 4.

Completeness

It explicitly answers both: what ("Implements keyboard, directional, and scene-level focus behavior across SwiftUI and UIKit") and when ("Use when managing @FocusState, defaultFocus, … or debugging focus with UIFocusDebugger") with concrete trigger phrases. This is the anchor-5 pattern; anchor 4 would require a weaker or less specific 'when' clause.

Trigger Term Quality

Natural trigger terms users would actually say are covered comprehensively with synonyms: "@FocusState", "keyboard", "Siri Remote", "Digital Crown", "gaze hover", "Full Keyboard Access", "key view loop", "focus restoration". Only marginal terms like "focus engine" or "first responder" are missing, which keeps it at anchor 5 rather than signaling anchor 4's 'a few natural terms missing'.

Distinctiveness Conflict Risk

The focus niche is clear and API-specific triggers are unlikely to fire for the wrong skill, but "watchOS Digital Crown input" and generic "keyboard" phrasing could pull in crown-scroll or text-input requests, and the domain sits directly adjacent to the ios-accessibility skill (the body must explicitly draw that boundary). Mostly distinct with minor overlap risk matches anchor 4; it does not reach anchor 5's 'minimal conflict risk'.