Conciseness

The body is prescriptive rather than tutorial — it teaches preferences ("prefer actor isolation", "Avoid class inheritance for shared behavior") instead of re-explaining Swift basics, and the DO/DON'T contrast adds decision value. Not a 5 because the full DON'T code blocks (e.g. a complete UnsafeImageCache class and a LegacyViewModel just to say "prefer @Observable") could be trimmed to one-line notes, and the DO fetchUser example even embeds a force-unwrap that contradicts the MUST NOT list.

Actionability

Four concrete, largely executable Swift patterns plus exact validation commands (`swift build`, `swift build -warnings-as-errors`, `swift test`) give copy-paste-ready guidance for the common cases. Not a 5 because the UserRepository example uses `{ /* … */ }` placeholder bodies rather than complete implementations — exactly the 'concrete code with minor gaps' anchor-4 case; not a 3 because three of four patterns are fully executable and commands are specific.

Workflow Clarity

The five-step Core Workflow has explicit validation checkpoints with commands ("After step 3, run `swift build`... After step 4, run `swift build -warnings-as-errors`... After step 5, run `swift test`"), which is stronger than the anchor-4 example's vague 'verify output'. Not a 5 because anchor 5 also expects feedback loops for error recovery — there is no guidance on what to do when a checkpoint fails — so it sits between 4 and 5; this is not a destructive/batch skill so no cap applies.

Progressive Disclosure

The Reference Guide table maps each topic to an existing one-level-deep file (all five of references/swiftui-patterns.md, async-concurrency.md, protocol-oriented.md, memory-performance.md, testing-patterns.md are present) with an explicit "Load When" column signaling when to pull each. Not a 4 because navigation, splitting, and signaling all match the anchor-5 structure with no nested references.

Specificity

The description lists six concrete actions in third person — "Builds iOS/macOS/watchOS/tvOS applications, implements SwiftUI views and state management, designs protocol-oriented architectures, handles async/await concurrency, implements actors for thread safety, and debugs Swift-specific issues" — matching the comprehensive-coverage anchor. Not a 4 because the action list covers building, state management, architecture, concurrency, thread safety, and debugging with no noticeable gaps.

Completeness

Both questions are explicitly answered: the "what" via the action list and the "when" via "Use when building iOS/macOS applications with Swift 5.9+, SwiftUI, or async/await concurrency. Invoke for protocol-oriented programming, ... UIKit integration, Combine, or Vapor" — concrete trigger phrases matching the anchor-5 example. Not a 4 because the 'when' clauses are already explicit and specific.

Trigger Term Quality

Strong natural coverage — "SwiftUI", "async/await", "UIKit", "Combine", "Vapor", "actors", "server-side Swift" — but a few common terms users would say are missing, e.g. ".swift" file extension, "Xcode", or plain "Swift code". Not a 5 because the comprehensive anchor explicitly expects synonyms and file extensions; not a 3 because keyword coverage is broad and clearly natural rather than jargon-only.

Distinctiveness Conflict Risk

It carves out a clear niche (Apple-platform Swift development) with distinct triggers like SwiftUI, Combine, Vapor, and actors, so it is unlikely to fire for unrelated skills. Not a 4 because the only conceivable overlap is with a hypothetical general mobile-development skill, which is minor.