App Intents Agent Skill

An agent skill that helps AI coding agents like Claude Code, Codex, Cursor, and Gemini write correct Swift App Intents code - exposing app actions and data to Siri, Shortcuts, Spotlight, widgets, Control Center, and Apple Intelligence.

It uses the Agent Skills format, so it works smoothly with Claude Code, Codex, Gemini, Cursor, and more.

What It Covers

• Intents - AppIntent, OpenIntent, SnippetIntent, ForegroundContinuableIntent, DeleteIntent, ShowInAppSearchResultsIntent, TargetContentProvidingIntent, URLRepresentableIntent, ProgressReportingIntent, LongRunningIntent, CancellableIntent, WidgetConfigurationIntent, ControlConfigurationIntent, PredictableIntent
• Execution lifecycle - the 30-second budget, LongRunningIntent + performBackgroundTask (iOS 27), CancellableIntent + withIntentCancellationHandler (iOS 26.4), background GPU access, allowedExecutionTargets to pin an intent to the app or an extension
• Foreground continuation - ForegroundContinuableIntent (iOS 17), requestToContinueInForeground, modern supportedModes + continueInForeground (iOS 26)
• Dialog + return types - ProvidesDialog, ReturnsValue, ShowsSnippetView, ShowsSnippetIntent, OpensIntent, OpenURLIntent, IntentDialog(full:supporting:), grammar agreement
• Metadata - IntentDescription(categoryName:searchKeywords:resultValueName:), isDiscoverable, openAppWhenRun, hard limits (10 shortcuts, 1000 phrases)
• Parameters - @Parameter (with Xcode 16 inferred titles), @AppEnum (with typeDisplayName), DynamicOptionsProvider, IntentParameterDependency, EntityCollection (identifiers-only at scale), native Duration / PersonNameComponents, valueState (set / cleared / unset for update intents), measurement options, array size per widget family, requestValue / needsValueError / requestConfirmation / requestChoice, conditional parameterSummary (Switch/Case/When/otherwise, widget-family conditions)
• Entities - AppEntity, IndexedEntity, TransientAppEntity, FileEntity, SyncableEntity (cross-device ids), OwnershipProvidingEntity (shared/public confirmation), RelevantEntities (proactive suggestions), shadow-struct pattern for SwiftData, @Property, @ComputedProperty(indexingKey:), @DeferredProperty, synonyms, pluralized TypeDisplayRepresentation, thumbnails (URL/Data/system/bundled), @UnionValue parameters
• Queries + Find intents - EntityQuery, EntityStringQuery, EnumerableEntityQuery, EntityPropertyQuery (auto-generated Find intent with comparators + sort), UniqueIDEntityQuery, IndexedEntityQuery (Spotlight reindexing), IntentValueQuery (structured Siri search + visual intelligence)
• Transferable + URL - Transferable conformance for sharing, IntentValueRepresentation / ValueRepresentation for structured system types (IntentPerson, PlaceDescriptor), URLRepresentableEntity + URLRepresentableIntent for no-code universal-link opens, OpenURLIntent return type for post-create navigation
• Snippets + Buttons - ShowsSnippetView (inline), ShowsSnippetIntent + SnippetIntent (indirect), interactive requestConfirmation(actionName:snippetIntent:) flows, iOS 26 snippet refresh cycle + SnippetIntent.reload(), 340pt height ceiling, Result vs Confirmation snippet types, Button(intent:)
• Shortcuts + Siri - AppShortcutsProvider, the \(.applicationName) rule, updateAppShortcutParameters() (SwiftUI + UIKit), SiriTipView, ShortcutsLink, Flexible Matching (iOS 17+), Negative Phrases, AppShortcuts String Catalog, accent colors in Info.plist, Xcode's App Shortcuts Preview tool, watchOS / HomePod specifics
• Widgets + relevance - WidgetConfigurationIntent, ControlConfigurationIntent, RelevantIntentManager + RelevantIntent for Smart Stack / complications
• Spotlight - IndexedEntity, CSSearchableIndex, associateAppEntity(_:priority:) for existing pipelines, @ComputedProperty(indexingKey:), custom attribute keys
• Dependencies - @Dependency, AppDependencyManager, data-controller pattern, AppIntentsPackage (frameworks, Swift Packages, static libs), cross-module entities, UISceneAppIntent + AppIntentSceneDelegate for UIKit, contentIdentifier + handlesExternalEvents for scene routing
• Widgets - WidgetCenter.reloadAllTimelines() after intent writes, App Group sharing pattern for interactive widget state
• SwiftData - ModelContainer vs ModelContext sendability, safe cross-actor patterns
• Siri + Apple Intelligence - @AppEntity / @AppIntent / @AppEnum schema macros, 13+ domains (.calendar.*, .messages.*, .photos.*, .journal.*, .mail.*, .browser.*, .visualIntelligence.*, .system.searchInApp, ...), three content-discovery paths (semantic index / structured search / in-app search), multi-schema build errors + Xcode fix-its, custom Siri responses, interaction donations (IntentDonationManager), confirmation + ownership, Use Model action via AttributedString parameters
• On-screen awareness + content transfer - the four annotation APIs (.userActivity, .appEntityIdentifier, collection forSelectionType, custom-canvas .appEntityUIElements), UIKit/AppKit equivalents, displayRepresentations fast path, entity annotations on User Notifications / Now Playing / AlarmKit
• Visual Intelligence - IntentValueQuery + SemanticContentDescriptor, now on iOS / iPadOS / macOS, @UnionValue multi-type results, semanticContentSearch "More results", receiving data via system stores (EventKit / Contacts / HealthKit)
• Testing - the new AppIntentsTesting framework (out-of-process integration: IntentDefinitions, makeIntent/run(), entities(matching:), spotlightQuery(), viewAnnotations(), test-only intents), plus direct perform() struct tests, mocking @Dependency, Swift Testing patterns, what you can / can't unit-test
• Anti-patterns - ~40 catches including @Model as AppEntity, missing \(.applicationName), @Query inside intents, unregistered intents, missing @Property, AppEntity instead of TransientAppEntity, missing Transferable, duplicate perform() on URLRepresentableIntent, mutation / expensive work in SnippetIntent.perform(), resolving entities at scale instead of EntityCollection, LongRunningIntent without progress, plain nil checks instead of valueState, cross-process write conflicts, TransientAppEntity for annotations, over-donating interactions, and more

Installing

You can install this skill into Claude Code, Codex, Gemini, Cursor, and more by using npx:

npx skills add https://github.com/n0an/App-Intents-Agent-Skill --skill app-intents

If you get the error npx: command not found, it means you don't currently have Node installed. You need to run this command to install Node through Homebrew:

brew install node

And if that fails it usually means you need to install Homebrew first.

When using npx, you can select exactly which agents you want to use during the installation. You can also select whether the skill should be installed just for one project, or whether it should be made available for all your projects.

Alternative install methods

Claude Code:

/plugin install n0an/App-Intents-Agent-Skill

Gemini:

gemini extensions install https://github.com/n0an/App-Intents-Agent-Skill.git --consent

Alternatively, you can clone this whole repository and install it however you want.

Using App Intents

The skill is called App Intents, and can be triggered in various ways. For example, in Claude Code you would use this:

/app-intents

And in Codex you would use this:

$app-intents

In both cases you can provide specific instructions if you want only a partial review. For example, /app-intents Fix the entity query in BookmarkEntity.swift on Claude, or $app-intents Add an OpenIntent that navigates to a selected article in Codex.

You can also trigger the skill using natural language:

Use the App Intents skill to review my Shortcuts integration in this project.

Why Use an Agent Skill for App Intents?

App Intents is a fast-moving framework that has changed significantly across iOS 16, 17, 18, 26, and the 27 releases (WWDC 2026). Most LLM training data either predates App Intents entirely or reflects the older SiriKit approach. As a result, agents routinely generate code that:

• Tries to make a SwiftData @Model class conform to AppEntity - which no longer compiles under Swift 6 because AppEntity requires Sendable
• Uses SwiftUI @Query inside an intent, which silently does nothing because intents aren't views
• Forgets \(.applicationName) in Siri phrases, which fails the AppShortcutsProvider macro at build time
• Creates ModelContainer and ModelContext inside perform() instead of injecting a shared data controller via @Dependency
• Returns the wrong IntentResult variant, producing runtime type-check crashes that aren't caught by the compiler
• Omits \(.applicationName) and shortcutTileColor, skips SiriTipView/ShortcutsLink, or never registers the intent in AppShortcutsProvider
• Reaches for NSUserActivity or old SiriKit APIs when modern App Intents cover the use case cleanly

This skill:

• Catches anti-patterns LLMs default to, like @Model entity conformance, bare String(format:) dialog, and unregistered intents
• Provides copy-pasteable patterns for every intent kind (action, open, snippet, focus, control widget) with correct return types
• Covers newer APIs like IndexedEntity, OpenIntent, ShowsSnippetView, @AssistantEntity / @AssistantIntent schemas, and the 27 releases additions (LongRunningIntent, EntityCollection, SyncableEntity, on-screen awareness, AppIntentsTesting)
• Enforces data-flow best practices like AppDependencyManager injection, main-actor-bound data controllers, and ModelContainer-only cross-actor transfer

Contributing

Contributions are welcome - whether adding new checks, improving existing examples, or fixing typos.

• Keep Markdown concise. There is a token cost to using skills, so respect the token budgets of users.
• Do not repeat things LLMs already know. Focus on edge cases, surprises, and common mistakes.
• All work must be licensed under the MIT license.

License

Available under the MIT License, which permits commercial use, modification, distribution, and private use.