Conciseness

The body is nearly all executable Swift code with terse annotations ('.interactive() — react to touch and pointer interactions'), assuming competence rather than explaining basics. Not a 5 because of redundancy: the intro paragraph restates the frontmatter, 'When to Activate' and 'When to Use' overlap, and the 'Key Design Decisions' table largely repeats 'Best Practices'.

Actionability

Mostly copy-paste-ready examples across SwiftUI ('.glassEffect(.regular.tint(.orange).interactive(), in: .rect(cornerRadius: 16.0))'), UIKit (full UIVisualEffectView with constraints), and WidgetKit. Below the 5 anchor because a few snippets are incomplete: the rendering-mode example has empty branch bodies, and 'symbolSet' in the union example is undefined.

Workflow Clarity

For a patterns/reference skill there is a clear progression per framework (basic effect → customization → containers → morphing), plus Best Practices and Anti-Patterns sections. This matches the 4 anchor; no validation checkpoints are needed since the skill involves no destructive or batch operations, but the 'Extending Horizontal Scrolling' section is thin guidance rather than concrete steps.

Progressive Disclosure

No bundle files exist, and the single-file body is well-sectioned with clear headers per framework and per concern, so navigation is easy. It sits between anchors — better organized than the 3 anchor (which expects content that clearly belongs in separate files inlined), but at ~275 lines the three framework sections could each be split into a reference file, keeping it below the 5 anchor's 'content appropriately split'.

Specificity

Quotes 'dynamic glass material with blur, reflection, and interactive morphing for SwiftUI, UIKit, and WidgetKit' — several concrete, specific capabilities named across all three frameworks. It falls short of the 5 anchor because these are feature nouns rather than concrete actions (no verbs like 'apply', 'create', 'migrate') and coverage of capabilities like buttons/toolbars/containers appears only via the framework names.

Completeness

Both halves are explicit: what — 'dynamic glass material with blur, reflection, and interactive morphing for SwiftUI, UIKit, and WidgetKit'; when — 'Use when building iOS 26 Liquid Glass UI in SwiftUI, UIKit, or WidgetKit'. This matches the 5 anchor (clearly and explicitly answers both what AND when with concrete trigger phrases); it is above the 4 anchor because the 'when' is explicit and concrete, not weakly implied.

Trigger Term Quality

Natural terms users would say are present: 'iOS 26', 'Liquid Glass', 'SwiftUI', 'UIKit', 'WidgetKit', 'glass', 'blur', 'reflection', 'morphing'. A few natural variations are missing ('glass buttons', 'toolbar styling', 'tinted mode', 'glass effect'), matching the 4 anchor ('good keyword coverage; a few natural terms missing') rather than the comprehensive 5 anchor.

Distinctiveness Conflict Risk

'iOS 26 Liquid Glass' is a narrow, well-defined niche with framework-specific triggers (SwiftUI/UIKit/WidgetKit); it would not plausibly fire for any other skill. Matches the 5 anchor ('clear niche with distinct triggers; minimal conflict risk').