Skills write-swift
📦

write-swift

Content revision r1 Safe ⚡ Contains scripts⚙️ External commands

Write Modern Swift with Confidence

Outdated Swift patterns can create concurrency errors, unclear APIs, and avoidable performance costs. This skill provides current Swift 6 guidance for implementation, review, and migration.

Supports: Claude Codex Code(CC)
🥉 77 Bronze

Install with my Agent

Copy this request to your Agent. It includes the canonical Skill page and manifest.

Agent request
Review the Skillstore skill "write-swift" from https://skillstore.io/skills/emilkowalski-write-swift.md and its manifest at https://skillstore.io/api/skills/emilkowalski-write-swift/manifest. Verify the artifact. You may proceed after verification, subject to the environment's own policy.

Your Agent should still show its plan and request any confirmation required by the security policy.

Agent-readable resources

Use these links when an AI agent, crawler, or script needs clean context instead of reading the full page.

Markdown detail GET /skills/emilkowalski-write-swift.md Signed manifest GET /api/skills/emilkowalski-write-swift/manifest Signed lockfile GET /api/skills/emilkowalski-write-swift/lockfile

Test it

Using "write-swift". Should this shared cache be a class, actor, or value type?

Expected outcome:

  • Use an actor when multiple tasks must mutate the same cache.
  • Keep values crossing the actor boundary Sendable.
  • Recheck cached state after suspension points to handle actor reentrancy.

Using "write-swift". Review a function that starts one detached task for every image.

Expected outcome:

  • Replace detached tasks with a bounded task group.
  • Preserve cancellation and priority through structured concurrency.
  • Measure image processing before adding parallel work.

Using "write-swift". How should an XCTest suite move to Swift Testing?

Expected outcome:

  • Keep required UI and performance tests in XCTest.
  • Write new unit tests with Test, expect, and require.
  • Migrate existing tests incrementally and preserve independent execution.

Security Audit

Safe
v1 • 8/22/2026 Open versioned report

The skill is a documentation-only Swift programming guide with no executable scripts or runtime integrations. All static findings are false positives caused by Markdown backticks, Swift macros, or ordinary technical prose, and no prompt injection or malicious intent was found.

1
Files scanned
389
Lines analyzed
0
Review items
0
False positives ignored

Risk Factors

⚡ Contains scripts (1)
SKILL.md:269
⚙️ External commands (50)
SKILL.md:10 SKILL.md:18 SKILL.md:20 SKILL.md:21 SKILL.md:22 SKILL.md:23 SKILL.md:31 SKILL.md:32 SKILL.md:33 SKILL.md:34 SKILL.md:35 SKILL.md:38-51 SKILL.md:51-53 SKILL.md:53 SKILL.md:61 SKILL.md:62 SKILL.md:63 SKILL.md:64 SKILL.md:65 SKILL.md:78 SKILL.md:79-80 SKILL.md:80-82 SKILL.md:82 SKILL.md:86-88 SKILL.md:88-89 SKILL.md:89 SKILL.md:92-101 SKILL.md:101-104 SKILL.md:104-106 SKILL.md:106 SKILL.md:110-113 SKILL.md:113-114 SKILL.md:114 SKILL.md:115-121 SKILL.md:121-123 SKILL.md:123 SKILL.md:124 SKILL.md:125 SKILL.md:126-127 SKILL.md:127-128 SKILL.md:128 SKILL.md:133-135 SKILL.md:135 SKILL.md:137 SKILL.md:139 SKILL.md:147 SKILL.md:149-150 SKILL.md:150 SKILL.md:151-152 SKILL.md:152-154
No confirmed security findings were detected by the latest completed static and semantic audit. This does not prove the skill has no side effects.
Audited by: codex
Share & cite this report

Share the versioned assessment report, neutral badge, embed card, and citations. Skillstore reports evidence without deciding whether this Skill is safe.

Open versioned report
Security Assessment

Copy report link

https://skillstore.io/skills/emilkowalski-write-swift/audits/1?utm_source=security_passport&utm_medium=share&utm_campaign=versioned_report

Markdown badge

[![Skillstore security assessment](https://skillstore.io/badges/skills/emilkowalski-write-swift/security.svg)](https://skillstore.io/skills/emilkowalski-write-swift?utm_source=security_passport_badge)

HTML badge

<a href="https://skillstore.io/skills/emilkowalski-write-swift?utm_source=security_passport_badge"><img src="https://skillstore.io/badges/skills/emilkowalski-write-swift/security.svg" alt="Skillstore security assessment" loading="lazy"></a>

Embed card

<iframe src="https://skillstore.io/embed/skills/emilkowalski-write-swift.html" title="Skillstore Security Assessment" sandbox="allow-popups allow-popups-to-escape-sandbox" loading="lazy" referrerpolicy="no-referrer" width="420" height="180"></iframe>
Academic citations (APA · BibTeX · CFF)

APA citation

emilkowalski. (2026). write-swift security audit report (audit version 1) [Author version unspecified]. Skillstore. https://skillstore.io/skills/emilkowalski-write-swift/audits/1

BibTeX citation

@techreport{emilkowalski-emilkowalski-write-swift-2026, author = {emilkowalski}, title = {write-swift security audit report (audit version 1)}, institution = {Skillstore}, year = {2026}, number = {1}, url = {https://skillstore.io/skills/emilkowalski-write-swift/audits/1}, note = {Author version unspecified} }

CITATION.cff

cff-version: 1.2.0 message: "If you use this Skill, cite its author and this versioned security audit report." title: "write-swift security audit report (audit version 1)" version: "unspecified" type: report authors: - name: "emilkowalski" date-released: "2026-08-22" url: "https://skillstore.io/skills/emilkowalski-write-swift/audits/1" identifiers: - type: other value: "skillstore:emilkowalski-write-swift:audit:1" description: "Skillstore immutable audit report identifier"

Skillstore Score

Why this score Evidence Confidence: Medium
55
Architecture
85
Maintainability
87
Content
65
Community
83
Spec Compliance

What You Can Build

Build a New Swift Feature

Choose clear data models, error handling, isolation, and tests before implementing a feature.

Review a Swift Codebase

Identify outdated concurrency, abstraction, memory, testing, and performance patterns during code review.

Migrate to Swift 6

Sequence compiler upgrades, concurrency checks, warning fixes, and language mode changes across targets.

Try These Prompts

Choose a Swift Model 
Design a Swift model for [domain]. Explain whether each type should be a struct, enum, actor, or class, and state why.
Review a Swift Function 
Review this Swift function for clarity, error handling, ownership, and modern syntax. Explain each recommended change and respect Swift [version].
Fix a Concurrency Problem 
Analyze this Swift concurrency error or hang. Trace actor isolation and Sendable boundaries, then propose the smallest data-race-safe correction.
Plan a Swift 6 Migration 
Create a target-by-target Swift 6 migration plan for [project]. Prioritize concurrency warnings, preserve behavior, define verification steps, and separate later refactoring.

Best Practices

  • Provide the Swift version, platform targets, and relevant build settings.
  • Include compiler diagnostics, surrounding types, and isolation annotations when debugging concurrency.
  • Profile representative tests before requesting performance-specific changes.

Avoid

  • Do not adopt unreleased Swift features without checking the active toolchain.
  • Do not silence Sendable errors with unchecked annotations before fixing ownership or isolation.
  • Do not combine a Swift 6 migration with unrelated architectural refactoring.

Frequently Asked Questions

Which Swift version does this skill target?
It targets Swift 6.3 and clearly identifies Swift 6.4 features that remain unreleased.
Can it help fix data-race diagnostics?
Yes. It analyzes sharing, Sendable conformance, actor isolation, task structure, and suspension points.
Does it replace compiler and runtime testing?
No. Compile the result and run tests with the project's actual toolchain and deployment targets.
Can it review SwiftUI concurrency?
Yes. It covers main actor isolation, Sendable closures, state capture, and task placement in UI workflows.
Does it cover performance optimization?
Yes. It explains likely costs and measurement methods, but recommendations require profiling evidence.
Can XCTest and Swift Testing coexist?
Yes. The skill recommends incremental migration while retaining XCTest for UI automation, performance metrics, and Objective-C requirements.

Developer Details

License

MIT

Skillstore revision

r1

Version notice

The author did not declare a version.

Repository

https://github.com/emilkowalski/skills/tree/d23d7f88a2e21c9e4b1418c7abe420f5c1052ba7/skills/write-swift

Ref

3adcd1428e73b613104c9b79f577e875669f01c5

Maintenance freshness

8/22/2026

Usage

0 downloads · 0 views

File structure

📄 SKILL.md