CharlesWiltgen/Axiom

Battle-tested Claude Code skills for modern xOS (iOS, iPadOS, watchOS, tvOS) development

About the project

Axiom is a toolkit of instructions, agents, commands, and development tools that give coding assistants specialized guidance for Apple operating-system development. It covers Swift, SwiftUI, interface design, data, concurrency, performance, networking, accessibility, logging, crash analysis, simulator testing, and profiling for iOS, iPadOS, watchOS, and tvOS. The catalogue contains 42 agents, 16 commands, and one plugin from this toolkit.

This repository also configures its own agents. See what Axiom tells them →

1.2kStars on the repository
154Mods indexed here, across every type
todayLast push, which is what freshness is scored on
MITLicence, which decides whether bodies are shown

axiom-analyze-crash

01

CharlesWiltgen/Axiom

Skill Codex

Use when the user has a crash log (.ips, MetricKit JSON, legacy .crash text, .xccrashpoint bundle, or pasted text) that needs analysis.

not rated 1.2k +5 today A SkillSpector: warn 42 tokens original MIT

CharlesWiltgen/Axiom

Skill Claude CodeCodex

Use when the user mentions Swift performance audit, code optimization, or performance review.

not rated 1.2k +5 today A SkillSpector: warn 24 tokens original MIT

CharlesWiltgen/Axiom

Skill Claude CodeCodex

Use when the user mentions SwiftUI performance, janky scrolling, slow animations, or view update issues.

not rated 1.2k +5 today A SkillSpector: pass 30 tokens original MIT

CharlesWiltgen/Axiom

Skill Claude CodeCodex

Use when the user mentions flaky tests, tests that pass locally but fail in CI, race conditions in tests, or needs to diagnose WHY a specific test fails.

not rated 1.2k +5 today A SkillSpector: pass 41 tokens original MIT

CharlesWiltgen/Axiom

Skill Codex

Use when the user wants to triage a CORPUS of production crashes/hangs from an aggregator (Sentry, App Store Connect) — grouped, counted issues — rather than a single crash file.

not rated 1.2k +5 today A SkillSpector: warn 49 tokens original MIT

CharlesWiltgen/Axiom

Skill Claude CodeCodex

Use when the user mentions accessibility checking, App Store submission, code review, or WCAG compliance.

not rated 1.2k +5 today A SkillSpector: pass 27 tokens original MIT

axiom-audit-camera

07

CharlesWiltgen/Axiom

Skill Claude CodeCodex

Use this agent to scan Swift code for camera, video, and audio capture issues including deprecated APIs, missing interruption handlers, threading violations, and permission anti-patterns.

not rated 1.2k +5 today A SkillSpector: warn 39 tokens original MIT

axiom-audit-codable

08

CharlesWiltgen/Axiom

Skill Claude CodeCodex

Use when the user mentions Codable review, JSON encoding/decoding issues, data serialization audit, or modernizing legacy code.

not rated 1.2k +5 today A SkillSpector: warn 32 tokens original MIT

CharlesWiltgen/Axiom

Skill Claude CodeCodex

Use when the user mentions concurrency checking, Swift 6 compliance, data race prevention, or async code review.

not rated 1.2k +5 today A SkillSpector: pass 29 tokens original MIT

CharlesWiltgen/Axiom

Skill Claude CodeCodex

Use when the user mentions Core Data review, schema migration, production crashes, or data safety checking.

not rated 1.2k +5 today A SkillSpector: pass 27 tokens original MIT

CharlesWiltgen/Axiom

Skill Claude CodeCodex

Use when the user mentions database schema review, migration safety, GRDB migration audit, or SQLite schema checking.

not rated 1.2k +5 today A SkillSpector: pass 30 tokens original MIT

axiom-audit-energy

12

CharlesWiltgen/Axiom

Skill Claude CodeCodex

Use when the user mentions battery drain, energy optimization, power consumption audit, or pre-release energy check.

not rated 1.2k +5 today A SkillSpector: warn 27 tokens original MIT

CharlesWiltgen/Axiom

Skill Claude CodeCodex

Use when the user mentions Foundation Models review, on-device AI audit, LanguageModelSession issues, @Generable checking, or Apple Intelligence integration review.

not rated 1.2k +5 today B SkillSpector: warn 39 tokens original MIT

CharlesWiltgen/Axiom

Skill Claude CodeCodex

Use when the user mentions GRDB performance review, slow GRDB queries, app-group database setup audit, a ValueObservation that stopped updating, or pre-release GRDB scan.

not rated 1.2k +5 changed today A SkillSpector: warn 43 tokens original MIT

axiom-audit-iap

15

CharlesWiltgen/Axiom

Skill Claude CodeCodex

Use when the user mentions in-app purchase review, IAP audit, StoreKit issues, purchase bugs, transaction problems, or subscription management.

not rated 1.2k +5 today A SkillSpector: warn 35 tokens original MIT

axiom-audit-icloud

16

CharlesWiltgen/Axiom

Skill Claude CodeCodex

Use when the user mentions iCloud sync issues, CloudKit errors, ubiquitous container problems, or asks to audit cloud sync.

not rated 1.2k +5 today A SkillSpector: warn 32 tokens original MIT

CharlesWiltgen/Axiom

Skill Claude CodeCodex

Use when the user mentions Liquid Glass review, iOS 26 UI updates, toolbar improvements, or visual effect migration.

not rated 1.2k +5 today A SkillSpector: warn 32 tokens original MIT

axiom-audit-memory

18

CharlesWiltgen/Axiom

Skill Claude CodeCodex

Use when the user mentions memory leak prevention, code review for memory issues, or proactive leak checking.

not rated 1.2k +5 today A SkillSpector: pass 26 tokens original MIT

CharlesWiltgen/Axiom

Skill Claude CodeCodex

Use when the user mentions networking review, deprecated APIs, connection issues, or App Store submission prep.

not rated 1.2k +5 today A SkillSpector: pass 27 tokens original MIT

axiom-audit-resize

20

CharlesWiltgen/Axiom

Skill Claude CodeCodex

Use when the user mentions window resizing support, resizable-window readiness, iPhone Mirroring compatibility, scene-lifecycle migration checking, or preparing an app for the 27-cycle resizing model.

not rated 1.2k +5 today A SkillSpector: warn 45 tokens original MIT

CharlesWiltgen/Axiom

Skill Claude CodeCodex

Use when the user wants to audit SpriteKit game code for common issues.

not rated 1.2k +5 today A SkillSpector: pass 23 tokens original MIT

axiom-audit-storage

22

CharlesWiltgen/Axiom

Skill Claude CodeCodex

Use when the user mentions file storage issues, data loss, backup bloat, or asks to audit storage usage.

not rated 1.2k +5 today A SkillSpector: warn 29 tokens original MIT

CharlesWiltgen/Axiom

Skill Claude CodeCodex

Use when the user mentions SwiftData review, @Model issues, SwiftData migration safety, or SwiftData performance checking.

not rated 1.2k +5 today A SkillSpector: pass 32 tokens original MIT

CharlesWiltgen/Axiom

Skill Claude CodeCodex

Use when the user mentions SwiftUI architecture review, separation of concerns, testability issues, or "logic in view" problems.

not rated 1.2k +5 today A SkillSpector: pass 36 tokens original MIT

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