Axiom

Battle-tested skills, agents, and tools for modern Apple platform development with AI coding assistants. Native for Claude Code, MCP for everything else.

What is Axiom?

Axiom gives AI coding assistants deep Apple platform 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.

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

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

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.

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

Name	axiom-foundation-models-ref
Description	Reference — Complete Foundation Models framework guide covering LanguageModelSession, @Generable, @Guide, Tool protocol, streaming, dynamic schemas, built-in use cases, and all WWDC 2025 code examples

axiom-foundation-models-ref

SKILL.md