Xcode 27 Skills

A collection of Agent Skills exported from Xcode 27. These skills give AI coding agents (Claude Code, etc.) authoritative, up-to-date guidance for building Apple platform apps — covering SwiftUI, UIKit modernization, Swift Testing, C bounds-safety, Xcode security hardening, and on-device verification.

Attribution The content of these skills was authored and published by Apple and exported from Xcode 27. This repository is a redistribution for convenience and reference only. All rights to the underlying guidance belong to Apple. No license is granted by this repository over Apple's content.

Skills

Skill	Purpose
swiftui-specialist	Best practices and idiomatic patterns for SwiftUI — structure, data flow, environment, modifiers, localization, animations, ForEach, and soft-deprecated APIs.
swiftui-whats-new-27	New SwiftUI APIs, behaviors, and deprecations in the 2027 OS releases (iOS/macOS/watchOS/tvOS/visionOS 27) — @State macro, reorderable, swipe actions, toolbar overflow, AsyncImage, item bindings, document-based apps.
uikit-app-modernization	Modernize UIKit apps for multi-window environments — replace legacy shared-state APIs, migrate to scene lifecycle, support dynamic scene sizing.
test-modernizer	Modernize test suites to use modern Swift Testing features or migrate from XCTest.
c-bounds-safety	Guide for the C -fbounds-safety language extension — language model, pointer annotations, adoption, build settings, and runtime debugging.
audit-xcode-security-settings	Audit and progressively enable security-oriented Xcode build settings — compiler warnings, static analyzer checkers, and Enhanced Security hardening.
device-interaction	Verify iOS app behavior on device or simulator via screenshots, UI hierarchy, and touch interactions.

Installation

Each top-level directory in this repo is a self-contained skill. Pick whichever method fits your agent.

Option 1 — npx skills (universal, recommended)

The skills CLI auto-detects your agent (Claude Code, Codex, etc.) and installs into it. Point it at this repo with the owner/repo shorthand:

# Pick interactively from the list of skills:
npx skills add superagents-lab/xcode27-skills

# Install one specific skill:
npx skills add superagents-lab/xcode27-skills --skill swiftui-specialist

# Install all seven:
npx skills add superagents-lab/xcode27-skills --skill '*'

Useful flags: --list to preview the skills without installing, -g/--global to install at the user level instead of the current project, and --copy to copy files instead of symlinking. Swap in any skill name from the table above.

Requires Node. If npx is missing, install it first: brew install node.

Option 2 — Manual install (any agent)

A skill is just a directory containing a SKILL.md, so any agent that supports the Agent Skills format can use it — clone the repo and copy the skill directories into wherever your agent looks for skills.

git clone https://github.com/superagents-lab/xcode27-skills.git

# Copy all seven skills, or just the ones you want, into your agent's skills directory:
cp -R xcode27-skills/*/ <your-skills-directory>/
cp -R xcode27-skills/swiftui-specialist <your-skills-directory>/

The agent auto-discovers any directory containing a SKILL.md and surfaces it when a task matches the skill's description.

Structure

Each skill is a directory containing a SKILL.md (with YAML frontmatter — name, description, etc.) and optional references/ and scripts/ subdirectories that the agent loads on demand.

<skill-name>/
├── SKILL.md          # entry point + metadata
├── references/       # detailed docs loaded as needed
└── scripts/          # helper scripts (where present)

Usage

Once installed, the agent surfaces a skill automatically when your request matches its description — you don't need to invoke it explicitly. In Claude Code you can also trigger one directly by name, e.g. /swiftui-specialist, and add focus hints like "check for soft-deprecated APIs" or "modernize these XCTest cases".