Axiom

Battle-tested skills, agents, and tools for modern Apple OS development — Swift 6, SwiftUI, Liquid Glass, Apple Intelligence, and more. Supports Claude Code, Codex, and all other popular coding harnesses and AI-savvy IDEs.

What is Axiom?

Axiom gives AI coding assistants deep Apple OS development expertise — the kind that prevents data loss from bad migrations, catches memory leaks before users complain, and stops you from spending 30 minutes debugging a zombie xcodebuild process.

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• 273 skills covering UI, data, concurrency, performance, networking, accessibility, and more
• 42 agents that autonomously scan for issues (memory leaks, concurrency violations, build problems)
• 17 commands for quick audits and diagnostics

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• xclog — a built-in console capture tool that gives AI assistants access to simulator and device logs
• xcsym — a built-in crash symbolication tool for .ips, MetricKit, and Apple's legacy .crash text crashes, with automatic dSYM discovery and pattern categorization
• xcui — a built-in tool to drive and validate the simulator UI and accessibility (tap by accessibility ID, dump the accessibility tree, check VoiceOver and Dynamic Type)
• xcprof — a built-in tool to record and analyze CPU/performance traces (xctrace) without opening Instruments

Every discipline skill is TDD-tested against real developer pressure scenarios. Learn more about quality.

OS 27 in progress. Axiom is on a 27.x beta that tracks Apple's OS 27 developer betas — OS-27 coverage lands continuously through the beta season. Guidance for OS 26 and earlier stays stable.

Installation

Claude Code (native plugin)

/plugin marketplace add CharlesWiltgen/Axiom

Then search for "axiom" in the /plugin menu and install.

MCP (VS Code, Cursor, Gemini CLI, and more)

See the MCP setup guide.

Pi (terminal coding agent)

pi install git:github.com/CharlesWiltgen/Axiom

One command installs the skills plus the /axiom-* commands and hooks. See the Pi setup guide.

Xcode (Claude Agent / Codex)

See the Xcode integration guide.

Getting Started

Skills activate automatically based on your questions. Just ask:

"I'm getting BUILD FAILED in Xcode"
"How do I fix Swift 6 concurrency errors?"
"My app has memory leaks"
"I need to add a database column safely"
"Show me what my app is logging"
"Symbolicate this crash file"

You can also use commands directly:

/axiom:console          # Capture simulator console output
/axiom:analyze-crash    # Parse and triage .ips, MetricKit, or .crash reports
/axiom:fix-build        # Diagnose build failures
/axiom:audit memory     # Scan for memory leaks
/axiom:audit concurrency # Check for data races
/axiom:health-check     # Run all relevant auditors

Documentation

Full documentation, skill catalog, and guides at charleswiltgen.github.io/Axiom.

Community

• r/axiomdev — Version announcements with changelogs
• Report issues or request features
• Share usage patterns and questions