swift-expert
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. Use when building iOS/macOS applications with Swift 5.9+, SwiftUI, or async/await concurrency. Invoke for protocol-oriented programming, SwiftUI state management, actors, server-side Swift, UIKit integration, Combine, or Vapor.
96
100%
Does it follow best practices?
Impact
93%
1.08xAverage score across 6 eval scenarios
Passed
No known issues
Quality
Discovery
100%Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.
This is an excellent skill description that comprehensively covers the Swift/Apple development domain. It provides specific concrete actions, includes extensive natural trigger terms across the Apple ecosystem, explicitly states both what it does and when to use it, and has a clear distinctive niche that minimizes conflict with other skills.
| Dimension | Reasoning | Score |
|---|---|---|
Specificity | Lists multiple specific concrete actions: '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'. | 3 / 3 |
Completeness | Clearly answers both what (builds apps, implements views, designs architectures, handles concurrency, debugs issues) AND when with explicit 'Use when...' and 'Invoke for...' clauses listing specific trigger scenarios. | 3 / 3 |
Trigger Term Quality | Excellent coverage of natural terms users would say: 'iOS', 'macOS', 'Swift', 'SwiftUI', 'async/await', 'actors', 'protocol-oriented programming', 'UIKit', 'Combine', 'Vapor', 'server-side Swift', and version-specific 'Swift 5.9+'. | 3 / 3 |
Distinctiveness Conflict Risk | Clear niche focused on Apple platform development with Swift-specific terminology (SwiftUI, UIKit, Combine, Vapor, actors) that would not conflict with general programming or other language-specific skills. | 3 / 3 |
Total | 12 / 12 Passed |
Implementation
100%Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.
This is an exemplary skill file that demonstrates best practices across all dimensions. It provides concrete, executable code patterns with clear DO/DON'T comparisons, a well-structured workflow with validation checkpoints, and appropriate progressive disclosure through a reference table. The constraints section is actionable without being verbose.
| Dimension | Reasoning | Score |
|---|---|---|
Conciseness | The content is lean and efficient, assuming Claude's competence with Swift. No unnecessary explanations of basic concepts; every section provides actionable patterns or constraints without padding. | 3 / 3 |
Actionability | Provides fully executable, copy-paste ready code examples with clear DO/DON'T patterns. Includes specific commands for validation (`swift build`, `swift test`) and concrete implementation patterns for async/await, SwiftUI, protocols, and actors. | 3 / 3 |
Workflow Clarity | Clear 5-step workflow with explicit validation checkpoints after steps 3, 4, and 5. Includes specific commands to run and what to verify at each checkpoint, with feedback loops implied (fix warnings, confirm tests pass). | 3 / 3 |
Progressive Disclosure | Excellent structure with a reference table pointing to topic-specific files with clear 'Load When' guidance. Core patterns are inline for quick reference while detailed guidance is appropriately delegated to separate reference files. | 3 / 3 |
Total | 12 / 12 Passed |
Validation
90%Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.
Validation — 10 / 11 Passed
Validation for skill structure
| Criteria | Description | Result |
|---|---|---|
metadata_field | 'metadata' should map string keys to string values | Warning |
Total | 10 / 11 Passed | |
- Repository
- jeffallan/claude-skills
- Commit
5b76101
- Reviewed
Table of Contents
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