Summary
Covers the entire testing landscape for Swift and Xcode, from unit tests with Swift Testing to UI automation with XCUITest. The quick reference table is genuinely useful for jumping to the right pattern when tests are flaky or slow. Notable for its opinionated stance on Swift Testing over XCTest for unit tests, complete with migration guidance and the "fast tests without simulator" architecture. The anti-rationalization section calling out sleep() in tests is spot on. Includes decision trees for routing to the right sub-skill and references to companion agents for automated test analysis. If you write tests in Swift, this consolidates patterns that would otherwise live in scattered Xcode documentation and Stack Overflow threads.
Install to Claude Code
npx -y skills add charleswiltgen/axiom --skill axiom-testing --agent claude-codeInstalls into .claude/skills of the current project.
Keeps your Mac awake while Claude Code, Codex or Cursor works. Lets it sleep when they are done.
Try free for 7 days →
Block distracting apps from your iPhone permanently without a 3rd party app. Free and open source.
Block now (100% free) →
Notes, actions and memory. Without a meeting bot. First month 100% off.
Download for free →
belt cli automatically finds the best tools and skills for your agent. image, video, music, tts...
one prompt install →
Free an open-source skills that make AI coding agents easier to understand, verify, and control.
Download for free →
Connect your Claude agent to live crypto prices and trading routes via 1inch
Get the MCP →Files
SKILL.md
Select a file.
Featured
Keeps your Mac awake while Claude Code, Codex or Cursor works. Lets it sleep when they are done.
Try free for 7 days →Block distracting apps from your iPhone permanently without a 3rd party app. Free and open source.
Block now (100% free) →Notes, actions and memory. Without a meeting bot. First month 100% off.
Download for free →belt cli automatically finds the best tools and skills for your agent. image, video, music, tts...
one prompt install →Free an open-source skills that make AI coding agents easier to understand, verify, and control.
Download for free →Connect your Claude agent to live crypto prices and trading routes via 1inch
Get the MCP →First SeenJun 3, 2026
