Charles Wiltgen
8488cc998b
Per-beta probe on Xcode 27.1 beta (27A9269, swiftlang-6.4.0.34.1), macOS and iOS: every documented Swift 6.4 feature still holds, Continuation escaping-resume is still rejected at SIL (limitation restamped through 27.1), and mapKeyedValues and stdlib FilePath remain absent. One arrival: withTemporaryAllocation (OutputSpan form) probes present, documented in the performance skill with a compile-verified snippet. The resize auditor's window-request check now says why a value-based gate is insufficient: supportsMultipleWindows is true on both displays once the scene manifest opts in — measured on the 27.1 Duo simulator — so it cannot tell you which display you are on. Verified: probe tables in the research notes; the new snippet compiles at the 27.0 floor.
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.
- 276 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
- 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.
Installation
Claude Code (native plugin)
/plugin marketplace add CharlesWiltgen/Axiom
Then search for "axiom" in the /plugin menu and install.
Cursor (native plugin)
Axiom's generated Cursor plugin includes 27 skill routers, 42 agents, 17 /axiom-* commands, advisory hooks, and automatic discovery of its MCP server configuration. See the Cursor install and support guide for the macOS support boundary and local installation steps.
MCP (VS Code, Cursor MCP-only, 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