axiom-apple-docs

Use when you need Apple's own documentation or a Swift compiler diagnostic explained rather than recalled.

1,503
installs: 0 up / 0 down, score 0.00
votes: 1,226
repo stars
Updated: less than a month ago
In the catalog since: 1 Oct 2026
From: charleswiltgen/axiom

Get it through your agent npx skills add charleswiltgen/axiom@axiom-apple-docs

Skill instructions

Rendered from the published SKILL.md, 216 lines.

Apple Documentation Router

Apple bundles for-LLM markdown documentation inside Xcode. These are authoritative, up-to-date guides and diagnostics written by Apple engineers. Read them directly as files (in Claude Code, with the Read tool) — no MCP server or special tool required.

When to Use

You need the exact API signature or behavior from Apple
An Axiom skill references an Apple framework and you want the official source
A Swift compiler diagnostic needs explanation
The user asks about a specific Apple framework feature

Priority: Axiom skills provide opinionated guidance (decision trees, anti-patterns, pressure scenarios). Apple docs provide authoritative API details. Use both together.

How to Read These Docs

Axiom's session context names the Xcode the user has switched to. In Claude Code it lists the literal base directories ("Apple for-LLM Documentation: Xcode detected at <path>"); other harnesses name the app ("Installed on this machine: Xcode … (<path>)") — substitute that .app for /Applications/Xcode.app in the table below. Read <base>/<filename> as a file (the Read tool in Claude Code).

Default Xcode location (/Applications/Xcode.app) base directories:

Content	Base directory
AdditionalDocumentation guides	`/Applications/Xcode.app/Contents/PlugIns/IDEIntelligenceChat.framework/Versions/A/Resources/AdditionalDocumentation/`
Swift compiler diagnostics	`/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/share/doc/swift/diagnostics/`

Example invocation Claude should produce:

Read /Applications/Xcode.app/Contents/PlugIns/IDEIntelligenceChat.framework/Versions/A/Resources/AdditionalDocumentation/SwiftUI-Implementing-Liquid-Glass-Design.md

These paths assume the default install; use the path from session context instead. Without session context: use AXIOM_XCODE_PATH if it is set; otherwise run xcode-select -p (it honors DEVELOPER_DIR), which prints <Xcode>.app/Contents/Developer — drop /Contents/Developer and put that .app in place of /Applications/Xcode.app above. If it prints /Library/Developer/CommandLineTools, no Xcode is selected; try /Applications/Xcode.app.

Guide Files (AdditionalDocumentation)

20 files. Read with the path pattern {guides base}/{filename}.

UI & Design

Topic	Filename
Liquid Glass in SwiftUI	`SwiftUI-Implementing-Liquid-Glass-Design.md`
Liquid Glass in UIKit	`UIKit-Implementing-Liquid-Glass-Design.md`
Liquid Glass in AppKit	`AppKit-Implementing-Liquid-Glass-Design.md`
Liquid Glass in WidgetKit	`WidgetKit-Implementing-Liquid-Glass-Design.md`
SwiftUI new toolbar features	`SwiftUI-New-Toolbar-Features.md`
SwiftUI styled text editing	`SwiftUI-Styled-Text-Editing.md`
SwiftUI WebKit integration	`SwiftUI-WebKit-Integration.md`
SwiftUI AlarmKit integration	`SwiftUI-AlarmKit-Integration.md`
Swift Charts 3D visualization	`Swift-Charts-3D-Visualization.md`
Foundation AttributedString updates	`Foundation-AttributedString-Updates.md`

Data & Persistence

Topic	Filename
SwiftData class inheritance	`SwiftData-Class-Inheritance.md`

Concurrency & Performance

Topic	Filename
Swift concurrency updates	`Swift-Concurrency-Updates.md`
InlineArray and Span	`Swift-InlineArray-Span.md`

Apple Intelligence

Topic	Filename
Foundation Models (on-device LLM)	`FoundationModels-Using-on-device-LLM-in-your-app.md`

System Integration

Topic	Filename
App Intents updates	`AppIntents-Updates.md`
StoreKit updates	`StoreKit-Updates.md`
MapKit GeoToolbox PlaceDescriptors	`MapKit-GeoToolbox-PlaceDescriptors.md`
Widgets for visionOS	`Widgets-for-visionOS.md`

Accessibility

Topic	Filename
Assistive Access in iOS	`Implementing-Assistive-Access-in-iOS.md`

Computer Vision

Topic	Filename
Visual Intelligence in iOS	`Implementing-Visual-Intelligence-in-iOS.md`

Swift Compiler Diagnostics

46 files in the diagnostics directory. Read with the path pattern {diagnostics base}/{filename}.

Concurrency Diagnostics

Diagnostic	Filename
Actor-isolated call from nonisolated context	`actor-isolated-call.md`
Conformance isolation	`conformance-isolation.md`
Isolated conformances	`isolated-conformances.md`
Nonisolated nonsending by default	`nonisolated-nonsending-by-default.md`
Sendable closure captures	`sendable-closure-captures.md`
Sendable metatypes	`sendable-metatypes.md`
Explicit Sendable annotations	`explicit-sendable-annotations.md`
Sending closure risks data race	`sending-closure-risks-data-race.md`
Sending risks data race	`sending-risks-data-race.md`
Mutable global variable	`mutable-global-variable.md`
Preconcurrency import	`preconcurrency-import.md`
Dynamic exclusivity	`dynamic-exclusivity.md`
Exclusivity violation	`exclusivity-violation.md`

Type System Diagnostics

Diagnostic	Filename
Existential any	`existential-any.md`
Existential member access limitations	`existential-member-access-limitations.md`
Nominal types	`nominal-types.md`

Show the whole skill (96 more lines)

Build & Migration Diagnostics

Diagnostic	Filename
Deprecated declaration	`deprecated-declaration.md`
Error in future Swift version	`error-in-future-swift-version.md`
Strict language features	`strict-language-features.md`
Strict memory safety	`strict-memory-safety.md`
Implementation only deprecated	`implementation-only-deprecated.md`
Member import visibility	`member-import-visibility.md`
Missing module on known paths	`missing-module-on-known-paths.md`
Module not testable	`module-not-testable.md`
Module version missing	`module-version-missing.md`
Clang declaration import	`clang-declaration-import.md`
Availability unrecognized name	`availability-unrecognized-name.md`
Always-available domain	`always-available-domain.md`
Upcoming language features	`upcoming-language-features.md`
Unknown warning group	`unknown-warning-group.md`
Compilation caching	`compilation-caching.md`
Embedded restrictions	`embedded-restrictions.md`

Swift Language Diagnostics

Diagnostic	Filename
Dynamic callable requirements	`dynamic-callable-requirements.md`
Property wrapper requirements	`property-wrapper-requirements.md`
Result builder methods	`result-builder-methods.md`
String interpolation conformance	`string-interpolation-conformance.md`
Trailing closure matching	`trailing-closure-matching.md`
Temporary pointers	`temporary-pointers.md`
Semantic copies	`semantic-copies.md`
Performance hints	`performance-hints.md`

Index

Diagnostic	Filename
Diagnostic groups (taxonomy)	`diagnostic-groups.md`
All diagnostics index	`diagnostics.md`

If a diagnostic you need isn't listed above, list the diagnostics directory first:

ls "<Xcode>.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/share/doc/swift/diagnostics/"

<Xcode>.app is the app session context names; without session context, derive it as above. Command Line Tools keep the same files at /Library/Developer/CommandLineTools/usr/share/doc/swift/diagnostics/.

Filenames follow the diagnostic's short name (lowercase, hyphenated).

Routing Decision Tree

User question about Apple API/framework?
├── Specific compiler error/warning → Read {diagnostics base}/<diagnostic-name>.md
├── Liquid Glass implementation     → Read {guides base}/<Framework>-Implementing-Liquid-Glass-Design.md
├── Swift concurrency patterns      → Read {guides base}/Swift-Concurrency-Updates.md
├── Foundation Models / on-device AI → Read {guides base}/FoundationModels-Using-on-device-LLM-in-your-app.md
├── SwiftData features              → Read {guides base}/SwiftData-Class-Inheritance.md
├── StoreKit / IAP                  → Read {guides base}/StoreKit-Updates.md
├── App Intents / Siri              → Read {guides base}/AppIntents-Updates.md
├── Charts / visualization          → Read {guides base}/Swift-Charts-3D-Visualization.md
├── Text editing / AttributedString → Read {guides base}/SwiftUI-Styled-Text-Editing.md or Foundation-AttributedString-Updates.md
├── WebKit in SwiftUI               → Read {guides base}/SwiftUI-WebKit-Integration.md
├── Toolbar features                → Read {guides base}/SwiftUI-New-Toolbar-Features.md
└── Other                           → ls the base directory to see what's available

Fallback When Xcode Is Unavailable

If the resolved Xcode has no IDEIntelligenceChat.framework documentation directory (older Xcode, or only Command Line Tools installed), fall back to the list below. For a Swift diagnostic, first try the Command Line Tools copy at /Library/Developer/CommandLineTools/usr/share/doc/swift/diagnostics/.

sosumi.ai (markdown mirror of developer.apple.com — see skills/apple-docs-research.md)
The SDK's own declarations – its Swift interfaces and Objective-C headers (also in skills/apple-docs-research.md); Command Line Tools includes only the macOS SDK
Suggest installing the latest Xcode for full Apple docs coverage

Do not silently fail — tell the user when Xcode docs aren't available locally and which fallback you used.

MCP Convenience Path

Clients using axiom-mcp can also invoke axiom_read_skill with the legacy ID (e.g., apple-guide-swiftui-implementing-liquid-glass-design). The MCP server reads the same Xcode files and returns the same content. Both paths are supported — the file-Read path works everywhere; the MCP path is a convenience for catalog/search workflows.

Research Methodology

When the bundled guides don't cover it — Apple's full API reference, the SDK's own declarations, or a WWDC session's transcript and code — see skills/apple-docs-research.md.

Resources

Skills: axiom-swiftui, axiom-concurrency, axiom-data, axiom-ai, axiom-integration

Get it through your agent

Call the Graph-of-Skills MCP server's retrieve_skill_bundle tool and it returns this skill's text inside your budget.

{
  "tool": "retrieve_skill_bundle",
  "arguments": {
    "query": "axiom-apple-docs"
  }
}

New to this? Set up Graph-of-Skills or get a free key. The text on this page comes from its authors: how skills are sourced and what we check. If none fits your task, your agent can write a skill for your own library. To keep a skill from your own library on a machine, see how to install one of your skills.

Share on X Share on LinkedIn Share on Bluesky Share on Hacker News

Share on Reddit

Source

Source repository charleswiltgen/axiom
Listing on skills.sh

From charleswiltgen/axiom via skills.sh

Related skills

axiom-xcode-mcp
Use when connecting to Xcode via MCP, using xcrun mcpbridge or the headless mcp-server, or working with ANY Xcode MCP tool (XcodeRead, BuildProject, RunSomeTests, RenderPreview). Covers setup, tool reference, workflows, troubleshooting.
1,413 installs
axiom-networking
Use when implementing or debugging ANY network connection, API call, or socket in an Apple app. Covers URLSession, Network.framework, NetworkConnection, connection diagnostics.
1,527 installs
sosumi
Fetches Apple documentation as Markdown via Sosumi. Use for Apple API reference, Human Interface Guidelines, WWDC transcripts, and external Swift-DocC pages.
1,995 installs
axiom-alerting
Create and manage Axiom monitors and notifiers via the v2 public API. Use when building alerting, routing notifications, validating monitor behavior, and maintaining alert configurations end-to-end.
2,466 installs
linter-docs
Deep linter reference for authoring or debugging a vigiles enforce() rule — plugin tables, AST selectors, type-aware rules, auto-fix, and edge cases for ESLint, Ruff, Pylint, RuboCop, Stylelint, and Clippy. Use when you need the exact rule name or config for a specific linter, not for running a linter. (JVM/Go linters — detekt, ktlint, Checkstyle, golangci-lint — and Cedar have no deep-dive file yet; their reference lives in docs/linter-support.md.)
2,004 installs