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.
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.
- 261 skills covering UI, data, concurrency, performance, networking, accessibility, and more
- 41 agents that autonomously scan for issues (memory leaks, concurrency violations, build problems)
- 15 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.crashtext 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.
/plugin marketplace add CharlesWiltgen/Axiom
Then search for "axiom" in the /plugin menu and install.
See the MCP setup guide.
pi install git:github.com/CharlesWiltgen/Axiom
One command installs the skills plus the /axiom-* commands and hooks. See the Pi setup guide.
See the Xcode integration guide.
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
Full documentation, skill catalog, and guides at charleswiltgen.github.io/Axiom.
- r/axiomdev — Version announcements with changelogs
- Report issues or request features
- Share usage patterns and questions