Conciseness

The body is largely lean pattern and version-gated API guidance (PresentationSizing values, iOS 26 Tab additions) that Claude cannot know reliably, but a few widely-known explanations could be trimmed, e.g. 'Universal links let iOS open your app for standard HTTPS URLs' and 'Falls back to stack navigation on iPhone'. This matches anchor 4 (efficient, minor instances of over-explanation) rather than 5, where every token would earn its place.

Actionability

Every major pattern ships complete, copy-paste-ready Swift code: typed Route enum with NavigationStack(path:), programmatic path manipulation, NavigationSplitView, manual HStack split with horizontalSizeClass, .sheet(item:) with .presentationSizing, TabView with the Tab(value:) API, and .onOpenURL app entry. Examples cover the common cases, matching anchor 5; not 4 because there are no meaningful gaps in executability.

Workflow Clarity

The deep-link section gives an explicit parse -> validate -> commit sequence with failure behavior ('Invalid links must leave the current navigation unchanged') and a Review Checklist is provided, but the body is primarily a pattern catalog: the router adoption workflow is deferred entirely to references/navigationstack.md with no inline steps. This fits anchor 4 (clear sequence, most checkpoints present, minor gaps) rather than 5, which would require fully explicit workflows with feedback loops throughout.

Progressive Disclosure

A clear overview with a table of contents, inline core patterns per topic, and well-signaled one-level-deep references ('See references/navigationstack.md for full router examples including per-tab stacks...'), plus a References section with descriptive labels. All five referenced files exist in references/ and none nest further references, matching anchor 5 exactly.

Specificity

'Implement SwiftUI navigation patterns including NavigationStack, NavigationSplitView, sheet presentation, tab-based navigation, and deep linking' names five concrete capabilities that comprehensively cover the navigation domain. This matches anchor 5 (multiple specific concrete actions, comprehensive coverage) rather than 4, since no meaningful capability area is missing.

Completeness

It explicitly answers both questions: what ('Implement SwiftUI navigation patterns including...') and when ('Use when building push navigation, programmatic routing, ... universal links, or custom URL scheme handling') with concrete trigger phrases. This is a direct match to the anchor 5 exemplar structure.

Trigger Term Quality

The when-clause lists seven natural trigger phrases ('push navigation, programmatic routing, multi-column layouts, modal sheets, tab bars, universal links, or custom URL scheme handling') and the what-clause adds the API names users actually type (NavigationStack, NavigationSplitView), with synonyms covered (sheet presentation/modal sheets, tab-based navigation/tab bars, deep linking/universal links/URL scheme). This matches anchor 5's comprehensive synonym coverage; anchor 4 ('a few natural terms missing') would apply only if common phrasings like these were absent.

Distinctiveness Conflict Risk

The description is tightly scoped to SwiftUI navigation, and its triggers (NavigationStack, universal links, custom URL schemes, tab bars, modal sheets) are unambiguous navigation requests no sibling skill would claim. Clear niche with distinct triggers and minimal conflict risk matches anchor 5; anchor 4's 'minor overlap risk' would require shared trigger territory, which at most 'multi-column layouts' brushes against.