Capacitor App Development

Guides the agent through general Capacitor app development topics. Covers core concepts (native bridge, plugins, web layer), Capacitor CLI usage, app configuration (capacitor.config.ts, splash screens, app icons, deep links), platform management (Android, iOS, Electron, PWA), edge-to-edge and safe area handling on Android, live reload setup, storage solutions, file handling, security best practices, CI/CD references, iOS package managers (SPM, CocoaPods), and troubleshooting for Android and iOS. Do not use for creating new Capacitor apps, Capacitor plugin APIs, creating Capacitor plugins, in-app purchases, upgrading Capacitor versions, Cordova or PhoneGap migration, or framework-specific patterns (Angular, React, Vue).

General guidance for developing cross-platform apps with Capacitor, covering core concepts, CLI usage, app configuration, platform management, and troubleshooting.

Prerequisites

1. Capacitor 6, 7, or 8 app already created and initialized.
2. Node.js and npm installed (Node 18+ for Cap 6, Node 20+ for Cap 7, Node 22+ for Cap 8).
3. For Android: Android Studio installed.
4. For iOS: Xcode installed on macOS.

Agent Behavior

• Auto-detect before asking. Inspect the project for platforms (android/, ios/), framework (vite.config.ts, angular.json, webpack.config.js, next.config.js), Capacitor version (@capacitor/core in package.json), and iOS dependency manager (ios/App/Podfile for CocoaPods vs. SPM).
• Route to the right reference file. Use the topic index below to identify the correct reference file and read it before providing guidance.
• One topic at a time. Address the user's specific question. Do not provide a general overview unless explicitly requested.
• Prefer actionable instructions. Provide exact file paths, commands, and diff blocks rather than conceptual explanations.

Procedures

Step 1: Identify the Topic

Match the user's request to a topic from the index below. If the request spans multiple topics, address them sequentially.

If the request matches a topic covered by a different skill, redirect the user to that skill (see Related Skills at the bottom).

Step 2: Analyze the Project

Auto-detect the following by reading project files:

1. Capacitor version: Read @capacitor/core version from package.json.
2. Platforms: Check which directories exist (android/, ios/).
3. Framework: Check for build tool config files.
4. Capacitor config format: Check for capacitor.config.ts or capacitor.config.json.
5. iOS dependency manager: Check for ios/App/Podfile (CocoaPods) or SPM usage.

Step 3: Read the Reference File and Apply Guidance

Read the reference file for the matched topic and apply the instructions to the user's project.

Topic Index

Topic	Reference
Core concepts (native bridge, how Capacitor works)	references/core-concepts.md
Capacitor platforms (Android, iOS, Electron, PWA)	references/platforms.md
Capacitor CLI commands	references/cli.md
App configuration (capacitor.config.ts)	references/app-configuration.md
Splash screens and app icons	references/splash-screens-and-icons.md
Deep links and universal links	references/deep-links.md
Android edge-to-edge support	references/edge-to-edge.md
Android safe area handling	references/safe-area.md
Live reload setup	references/live-reload.md
Storage solutions	references/storage.md
File handling best practices	references/file-handling.md
Security best practices	references/security.md
iOS package managers (SPM, CocoaPods)	references/ios-package-managers.md
CI/CD for Capacitor apps	references/ci-cd.md
Testing (unit and E2E)	references/testing.md
Cross-platform best practices	references/cross-platform-best-practices.md
Android troubleshooting	references/troubleshooting-android.md
iOS troubleshooting	references/troubleshooting-ios.md

Error Handling

• npx cap sync fails: Verify @capacitor/core and @capacitor/cli versions match. On iOS with CocoaPods, run cd ios/App && pod install. On Android, sync Gradle files in Android Studio.
• Android build fails after configuration changes: Clean the build with cd android && ./gradlew clean, then rebuild.
• iOS build fails after configuration changes: Clean the build folder in Xcode (Product > Clean Build Folder) or delete ios/App/Pods and run cd ios/App && pod install.
• Plugin not found at runtime: Run npx cap sync after any plugin installation. Verify the plugin appears in capacitor.config or the native project.
• Live reload not connecting: Verify the device and development machine are on the same network. Check that the server URL in capacitor.config uses the correct LAN IP address.
• Deep links not working: Verify the site association file is accessible at https://<domain>/.well-known/apple-app-site-association (iOS) or https://<domain>/.well-known/assetlinks.json (Android). Verify the app is signed with the correct certificate.

Related Skills

• capacitor-app-creation — Create a new Capacitor app.
• capacitor-angular — Angular-specific Capacitor development.
• capacitor-react — React-specific Capacitor development.
• capacitor-vue — Vue-specific Capacitor development.
• capacitor-plugins — Install and configure Capacitor plugins.
• capacitor-plugin-development — Create custom Capacitor plugins.
• capacitor-app-upgrades — Upgrade Capacitor to a newer major version.
• capacitor-in-app-purchases — Set up in-app purchases.
• capawesome-cloud — Cloud builds, live updates, and app store publishing.