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.

Quality

92%

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Quality

Content

85%Weight 40%Scale 1-5

Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.

The body is well-structured and highly actionable: a sequenced workflow with real validation checkpoints, copy-paste-ready DO/DON'T patterns, and a clean one-level reference table pointing to existing bundle files. The only soft spot is minor over-explanation and a few elided code bodies, which hold conciseness and actionability just below the top anchor.

Dimension	Reasoning	Score
Conciseness	The body is lean — no padding about what Swift/PDFs/libraries are — and the DO/DON'T comments earn their tokens by explaining the non-obvious 'why'. A few generic bullets ('Use type hints and inference appropriately', 'Profile with Instruments before optimizing') could be tightened, keeping it just below the top anchor.	4 / 5
Actionability	Provides concrete, executable Swift in DO/DON'T pairs (async/await, @Observable, Repository protocol, actor ImageCache) plus runnable validation commands (swift build, swift build -warnings-as-errors, swift test). Minor gaps — some implementation bodies are elided with `/* … */` — keep it from being fully copy-paste ready.	4 / 5
Workflow Clarity	The five-step Core Workflow is clearly sequenced with explicit validation checkpoints after steps 3, 4, and 5 (swift build, -warnings-as-errors, swift test), matching the anchor for explicit validation steps and feedback loops.	5 / 5
Progressive Disclosure	SKILL.md is a concise overview with a Reference Guide table linking to five one-level-deep reference files (all present in ./references/), each with a clear 'Load When' condition; detailed guidance is appropriately split out rather than inlined.	5 / 5
	Total	18 / 20 Passed

Description

100%Weight 40%Scale 1-5

Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.

The description is exemplary: third-person voice, concrete capabilities, explicit 'Use when'/'Invoke for' trigger guidance, and a well-scoped niche that distinguishes it from generic coding skills. Every dimension lands at the top anchor.

Dimension	Reasoning	Score
Specificity	Lists multiple 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', 'debugs Swift-specific issues' — giving comprehensive coverage rather than vague language.	5 / 5
Completeness	Explicitly answers both 'what' (builds apps, implements SwiftUI, designs protocols, handles concurrency, implements actors, debugs) and 'when' via 'Use when building iOS/macOS applications with Swift 5.9+, SwiftUI, or async/await concurrency. Invoke for protocol-oriented programming...'.	5 / 5
Trigger Term Quality	Covers natural terms and synonyms users would say — Swift, SwiftUI, iOS/macOS/watchOS/tvOS development, async/await, Combine, UIKit, Vapor, server-side Swift, protocol-oriented programming — comprehensively across frameworks and platforms.	5 / 5
Distinctiveness Conflict Risk	Targets a clear niche (Swift 5.9+ language specialist with named frameworks SwiftUI/Combine/Vapor/UIKit/actors) with distinct triggers and minimal overlap risk with other language skills.	5 / 5
	Total	20 / 20 Passed

Validation

93%

Warnings & errors only

Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.

Validation — 15 / 16 Passed

Validation for skill structure

Criteria	Description	Result
metadata_field	'metadata' should map string keys to string values	Warning

	Total	15 / 16 Passed

Repository: Jeffallan/claude-skills
Path: skills/swift-expert/SKILL.md
Commit: 882ef55

Reviewed: 3 days ago

Table of Contents

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