Skills

Discipline-enforcing workflows tested with "red/green/refactor" methodology to prevent common mistakes under pressure.

UI & Design

Skill	When to Use
hig	Quick design decisions, HIG compliance checklists, defending design choices
hig-ref	Comprehensive HIG reference with code examples and best practices
liquid-glass	Implementing Liquid Glass effects, debugging visual artifacts, design review pressure
liquid-glass-ref	Complete Liquid Glass adoption guide (icons, controls, navigation, windows)
swiftui-architecture	Separating logic from views, choosing architecture patterns (MVVM, TCA, Coordinator)
swiftui-performance	App feels sluggish, animations stutter, SwiftUI Instrument profiling
swiftui-debugging	View doesn't update, preview crashes, layout issues
swiftui-debugging-diag	Systematic SwiftUI debugging, intermittent issues, complex state dependencies
swiftui-gestures	Implementing tap, drag, long press, magnification, rotation gestures
swiftui-layout	Adaptive layouts, iPad multitasking, iOS 26 free-form windows
swiftui-layout-ref	ViewThatFits, AnyLayout, Layout protocol, iOS 26 window APIs
swiftui-nav	NavigationStack vs NavigationSplitView, deep links, coordinator patterns
swiftui-nav-diag	Navigation not responding, unexpected pops, deep link failures
swiftui-nav-ref	Comprehensive SwiftUI navigation API reference (iOS 16-26)
swiftui-26-ref	iOS 26 SwiftUI: Liquid Glass, WebView, AttributedString rich text, 3D charts
textkit-ref	TextKit 2 architecture, migration, Writing Tools support
typography-ref	San Francisco fonts, text styles, Dynamic Type, tracking, leading
uikit-animation-debugging	CAAnimation issues, completion handlers, spring physics

Computer Vision

Skill	When to Use
vision	Subject segmentation, hand/body pose, text recognition (OCR), barcode/QR scanning, document scanning
vision-ref	Complete Vision framework API reference with code examples
vision-diag	Subject not detected, text not recognized, barcode issues, performance problems

Machine Learning

Skill	When to Use
coreml	Deploy custom ML models, model conversion, compression, LLM inference with KV-cache
coreml-ref	CoreML API reference, MLTensor, coremltools, state management
coreml-diag	Model load failures, slow inference, compression accuracy loss
speech	Speech-to-text with SpeechAnalyzer (iOS 26+), live transcription, file transcription

Debugging

Skill	When to Use
accessibility-diag	VoiceOver issues, Dynamic Type violations, WCAG compliance, App Store Review prep
auto-layout-debugging	Constraint conflicts, ambiguous layout warnings, Auto Layout errors
build-performance	Slow builds, type checking bottlenecks, analyzing Build Timeline
build-debugging	Dependency conflicts, CocoaPods/SPM failures
core-data-diag	Schema migration crashes, thread-confinement errors, N+1 query performance
deep-link-debugging	Debug-only deep links for testing, simulator navigation, automated testing
memory-debugging	Memory leaks, retain cycles, progressive memory growth
objc-block-retain-cycles	Block memory leaks, weak-strong patterns
performance-profiling	App feels slow, profiling with Instruments
xcode-debugging	BUILD FAILED, simulator hangs, zombie processes

Concurrency

Skill	When to Use
swift-concurrency	Swift 6 actor isolation, Sendable errors, data races

Persistence & Storage

Skill	When to Use
cloud-sync	CloudKit vs iCloud Drive, offline-first sync, conflict resolution
cloudkit-ref	CloudKit sync, CKSyncEngine, CKRecord, shared database, conflict resolution
cloud-sync-diag	File not syncing, CloudKit errors, sync conflicts, iCloud upload failures
codable	JSON encoding/decoding, Codable conformance, handling decode errors, date strategies
core-data	Core Data stack, concurrency patterns, relationship modeling, iOS 16 support
database-migration	Adding database columns, schema changes, migration errors
file-protection-ref	FileProtectionType, file encryption, data protection, secure storage
grdb	Raw SQL queries, complex joins, ValueObservation
icloud-drive-ref	iCloud Drive, ubiquitous containers, NSFileCoordinator, file sync
realm-migration-ref	Migrating from Realm to SwiftData (Device Sync sunset Sept 2025)
sqlitedata	SQLiteData patterns, batch imports, CloudKit sync
storage-diag	Files disappeared, data missing, backup too large, file not found
storage-management-ref	Purge files, storage pressure, isExcludedFromBackup, cache management
storage	Where to store data, SwiftData vs files, CloudKit vs iCloud Drive
swiftdata	@Model, @Query, CloudKit integration
swiftdata-migration	SwiftData custom schema migrations, relationship preservation
swiftdata-migration-diag	Migration crashes, relationship errors, device vs simulator failures
sqlitedata-migration	Migrating from SwiftData to SQLiteData

Integration

Skill	When to Use
app-discoverability	App Intents, App Shortcuts, Core Spotlight, NSUserActivity for Spotlight/Siri suggestions
app-intents-ref	Siri, Apple Intelligence, Shortcuts, Spotlight integration (iOS 16+)
app-shortcuts-ref	App Shortcuts, instant Siri availability, suggested phrases
apple-docs-research	Researching Apple frameworks, getting WWDC transcripts, using sosumi.ai
avfoundation-ref	AVAudioSession, AVAudioEngine, bit-perfect DAC output, iOS 26+ spatial audio capture
core-spotlight-ref	Core Spotlight search, NSUserActivity, CSSearchableItem, IndexedEntity
extensions-widgets	Implementing widgets, Live Activities, Control Center controls
extensions-widgets-ref	Complete WidgetKit/ActivityKit API reference
foundation-models	On-device AI with Apple's Foundation Models framework (iOS 26+)
foundation-models-diag	Foundation Models troubleshooting (context exceeded, guardrails, slow generation)
foundation-models-ref	Complete Foundation Models API reference with WWDC examples
in-app-purchases	StoreKit 2 implementation, subscriptions, transaction handling
network-framework-ref	Network.framework API reference (iOS 12-26+), TLV framing, Wi-Fi Aware
networking	Implementing UDP/TCP connections, migrating from sockets, debugging connection failures
networking-diag	Connection timeouts, TLS failures, data not arriving, performance issues
now-playing	Now Playing metadata, Lock Screen/Control Center integration, remote commands
storekit-ref	Complete StoreKit 2 API reference with iOS 18.4 enhancements

Testing

Skill	When to Use
ui-testing	Recording UI tests, flaky tests, race conditions

Skill Development Methodology

Skills in Axiom are developed using rigorous quality standards:

TDD-Tested Skills

Battle-tested against real-world scenarios and pressure conditions:

• axiom-xcode-debugging – Handles mysterious build failures, zombie processes, and simulator hangs
• axiom-swift-concurrency – Prevents data races and actor isolation errors in Swift 6
• axiom-database-migration – Prevents data loss during schema changes with 100k+ users
• axiom-swiftdata – Handles CloudKit corruption, many-to-many relationships, and unfollow patterns
• axiom-memory-debugging – Finds PhotoKit leaks and diagnoses non-reproducible memory issues
• axiom-ui-testing – Handles flaky tests, network conditions, and App Store review blockers
• axiom-build-debugging – Resolves dependency conflicts under production crisis pressure
• axiom-liquid-glass – Navigates design review pressure and variant decision conflicts
• axiom-swiftui-performance – Diagnoses performance issues under App Store deadline pressure
• axiom-swiftui-debugging – Solves intermittent view updates and preview crashes
• axiom-performance-profiling – Identifies CPU bottlenecks, memory growth, and N+1 queries
• axiom-sqlitedata – Handles StructuredQueries migration crashes and data-loss scenarios
• axiom-grdb – Optimizes complex join queries and ValueObservation performance

Reference Skills

All reference skills are reviewed against 4 quality criteria:

1. Accuracy – Every claim cited to official sources, code tested
2. Completeness – 80%+ coverage, edge cases documented, troubleshooting sections
3. Clarity – Examples first, scannable structure, jargon defined
4. Practical Value – Copy-paste ready, expert checklists, real-world impact

Current reference skills

• axiom-accessibility-diag – WCAG compliance, VoiceOver testing, Accessibility Inspector workflows
• axiom-app-intents-ref – Siri, Apple Intelligence, Shortcuts, Spotlight integration
• axiom-swiftui-26-ref – iOS 26 SwiftUI: Liquid Glass, WebView, rich text, 3D charts
• axiom-core-data-diag – Core Data troubleshooting and optimization
• axiom-realm-migration-ref – Migration patterns from Realm to SwiftData
• axiom-network-framework-ref – Network.framework API reference (iOS 12-26+)
• axiom-avfoundation-ref – AVFoundation audio APIs, iOS 26+ spatial audio, bit-perfect DAC
• axiom-foundation-models-ref – Apple Intelligence Foundation Models framework (iOS 26+)
• axiom-foundation-models-diag – Foundation Models troubleshooting and diagnostics
• axiom-swiftui-layout-ref – ViewThatFits, AnyLayout, Layout protocol, iOS 26 window APIs

Related Resources

• WWDC 2025 Sessions
• Claude Code Documentation
• Superpowers TDD Framework

Contributing

This is a preview release. Feedback welcome!

• Issues: Report bugs or request features
• Discussions: Share usage patterns and ask questions