programming-swift

programming-swift is a skill for Claude Code, Codex from kylehughes/the-unofficial-swift-programming-language-skill. It costs 54 tokens per session (1,417 once invoked), scanned A, original, MIT.

The complete Apple reference book for the Swift programming language, version 6.4 beta. Swift is a programming language used for Apple platforms and other software.

In plain words
What is it for?
Use it to verify Swift code, understand language behavior, investigate compiler errors, and look up formal language features.
Why use it?
It provides exact language documentation for checking syntax, language features, concurrency, and compiler-related questions.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to verify Swift code, understand language behavior, investigate compiler errors, and look up formal language features.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/kylehughes/the-unofficial-swift-programming-language-skill/programming-swift
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add kylehughes/the-unofficial-swift-programming-language-skill --skill programming-swift
Clone the repo
git clone --depth 1 https://github.com/kylehughes/the-unofficial-swift-programming-language-skill

Made for: Claude Code, Codex.

Its marketplace also offers this one on its own, as the plugin programming-swift-skill — /plugin install programming-swift-skill after adding the marketplace above.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for programming-swift

README.md
[![agentmods](https://agentmods.dev/badge/skills/kylehughes/the-unofficial-swift-programming-language-skill/programming-swift/github.svg)](https://agentmods.dev/skills/kylehughes/the-unofficial-swift-programming-language-skill/programming-swift)
Your own site
<a href="https://agentmods.dev/skills/kylehughes/the-unofficial-swift-programming-language-skill/programming-swift"><img src="https://agentmods.dev/badge/skills/kylehughes/the-unofficial-swift-programming-language-skill/programming-swift/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for programming-swift

Your own site · 80×15
<a href="https://agentmods.dev/skills/kylehughes/the-unofficial-swift-programming-language-skill/programming-swift"><img src="https://agentmods.dev/badge/skills/kylehughes/the-unofficial-swift-programming-language-skill/programming-swift.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 54 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,417 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00054 $0.01417
Opus 5.5 $0.00022 $0.00567
Sonnet 5.5 $0.00011 $0.00283
Haiku 4.5 $0.00005 $0.00142

Measured 1mo ago against content hash 789a90f6c769, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

programming-swift scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

programming-swift/SKILL.md · 73 lines

How it starts

The opening of the file, as written. The whole thing — 73 lines — stays where its author put it; the contents beside it link to each section on GitHub.

The Swift Programming Language

The entire content of The Swift Programming Language (6.4) book by Apple. This is a comprehensive language reference and guide to the Swift programming language.

Documentation Structure

Getting Started (GuidedTour)

Language Guide

Read the full file on GitHub · 73 lines

Files

What ships with it

42 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 1mo ago Changed · -1 tokens per session 789a90f6c769
  2. 1mo ago First seen · 73 lines · 55 tokens per session scan A dfdbb695889a

Subscribe to this mod's changes

programming-swift is a skill published in the GitHub repository kylehughes/the-unofficial-swift-programming-language-skill (46 stars, last pushed 1mo ago), licensed MIT. It adds 54 tokens to every session and 1,417 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Related

Other skills, from other repositories

swift-expert

Expert-level Swift development for iOS, macOS with SwiftUI, Combine, and modern Swift 5.9+. Use when the user mentions iOS, macOS, SwiftUI, Combine, async await, or Apple platforms, or when the task involves Modern Swift Features, Basics and Optionals, Functions and Closures, or Structs and Classes.

personamanagmentlayer/pcl · 76 tokens

swift-coding-standards

Master Swift coding standards with Apple's guidelines, protocol-oriented design, and modern concurrency patterns.

williamzujkowski/standards · 23 tokens

swiftui-max

Expert SwiftUI guidance for building UI on iOS, iPadOS, macOS, watchOS, tvOS, and visionOS. Use whenever writing, reviewing, refactoring, or debugging ANY SwiftUI code — views, view modifiers, layout, navigation (NavigationStack/SplitView, deep links), lists and scrolling, animation and transitions, state management…

Dev869/swift-tothemax · 271 tokens

swift-language

Comprehensive modern Swift (6.x) language expertise — concurrency, generics, ownership/performance, macros, API design, error handling, SwiftPM, C/C++/ObjC interop, cross-platform (Linux/Android/embedded/server), and Swift Testing. Use this skill whenever writing, reviewing, refactoring, or debugging ANY Swift code …

Dev869/swift-tothemax · 167 tokens

apple-dev-conductor

Orchestrator for the swift-tothemax plugin — routes any Apple-platform development task (building an iOS/macOS app, adding a feature, preparing a release, fixing a rejection) to the right combination of skills in the correct order. Use this skill FIRST whenever a task spans more than one facet of Apple development …

Dev869/swift-tothemax · 156 tokens

ios-expert

Expert in iOS development with SwiftUI, UIKit, Combine, and Apple ecosystem integration. Use when the user mentions mobile, Swift, SwiftUI, UIKit, Apple platforms, or Xcode, or when the task involves iOS App Architecture, SwiftUI Fundamentals, UIKit Essentials, or Combine Framework.

personamanagmentlayer/pcl · 64 tokens