capacitor-plugin-upgrade-v7-to-v8
Upgrades a Capacitor plugin library from v7 to v8 using npx @capacitor/plugin-migration-v7-to-v8@latest, then the manual checklist - dev deps ^8.0.0 and peer @capacitor/core =8.0.0, minSdk 24 and compile/target SDK 36 defaults, AndroidX dependency defaults, AGP 8.13.0, Gradle 8.14.3, Gradle = property assignment syntax, Java 21, Kotlin 2.2.20 (kotlinOptions to compilerOptions, no kotlin-android-extensions), google-services 4.4.4, iOS 15 in podspec and Package.swift, capacitor-swift-pm from: "8.0.0", and the renamed capacitorbridgelayoutmain resource. Use when a plugin targets Capacitor 7 and must support 8, or on Kotlin 2 / Gradle space-assignment errors. Points to the v8-to-v9 next step. Do not use for app upgrades, other major versions, or non-Capacitor libraries.
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Install
Works with every agent the skills CLI supports.
npx skills add https://github.com/cap-go/capgo-skills --skill capacitor-plugin-upgrade-v7-to-v8- 01
Install
Run the command in your project. The CLI asks which agents to install for.
- 02
Describe the task
Ask your agent for something this skill covers. It loads capacitor-plugin-upgrade-v7-to-v8 automatically when relevant.
- 03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.
SKILL.md
The instructions your agent reads when the skill is triggered.
Capacitor Plugin Upgrade v7 to v8
Move a plugin library to Capacitor 8. Source of truth: https://capacitorjs.com/docs/updating/plugins/8-0
When to Use
- Snapshot shows
@capacitor/core7.x and the plugin must work in Capacitor 8 apps. - Building the plugin against Kotlin 2.2 fails on
kotlinOptionsorkotlin-android-extensions. - Gradle warns
Properties should be assigned using the 'propName = value' syntax.
Do not use:
- Upgrading an app ->
capacitor-app-upgrade-v7-to-v8. - Plugin on 6.x ->
capacitor-plugin-upgrade-v6-to-v7first. Multi-hop ->capacitor-plugin-upgrades. - Plugin already on 8.x ->
capacitor-plugin-upgrade-v8-to-v9. - Adding SPM ->
capacitor-plugin-spm-support.
Live Project Snapshot
Plugin and Capacitor package snapshot:
!node -e "const fs=require('fs');if(!fs.existsSync('package.json'))process.exit(0);const pkg=JSON.parse(fs.readFileSync('package.json','utf8'));const out=['package.name='+(pkg.name||''),'package.version='+(pkg.version||'')];for(const section of ['peerDependencies','dependencies','devDependencies']){for(const [name,version] of Object.entries(pkg[section]||{})){if(name.startsWith('@capacitor/'))out.push(section+'.'+name+'='+version)}}console.log(out.join('\n'))"
Example and native project paths:
!find . -maxdepth 3 \( -path './example-app' -o -path './ios' -o -path './android' \)
References
| File | Load when |
|---|---|
references/android.md | Dependency defaults, SDK, AGP/Gradle, = syntax, Java 21, Kotlin 2.2 changes |
references/ios.md | iOS 15 in podspec / Package.swift / old-structure project, capacitor-swift-pm 8 |
Preflight
| Tool | Minimum |
|---|---|
| Node.js | 22+ |
| Xcode | 26.0+ |
| iOS deployment target | 15.0 |
| Java | 21 recommended (17+ supported by AGP 8.13) |
| AGP / Gradle | 8.13.0 / 8.14.3 |
| Android SDK defaults | minSdk 24, compileSdk 36, targetSdk 36 |
| Kotlin (if used) | 2.2.20 |
Procedure
-
Confirm 7.x and a clean tree.
-
From the plugin root:
npx @capacitor/plugin-migration-v7-to-v8@latestReview
git diff. -
package.json: dev deps
@capacitor/cli,core,android,iosto^8.0.0; peer@capacitor/coreto>=8.0.0. -
Android per
references/android.md:- Only add/update the
ext {}dependency defaults the plugin actually uses. - SDK defaults 24/36/36, AGP 8.13.0, Gradle 8.14.3, google-services 4.4.4 (if used).
- Convert every property assignment to
=(namespace = ...,compileSdk = ...,url = ...,abortOnError = ...). Method calls such asmavenCentral()stay unchanged. - Java 21
compileOptions. - Kotlin plugins:
kotlin_version2.2.20, replacekotlinOptions {}withkotlin { compilerOptions { jvmTarget = JvmTarget.JVM_21 } }, dropkotlin-android-extensions(usekotlin-parcelize/ view binding). - Code referencing
R.layout.bridge_layout_mainmust usecapacitor_bridge_layout_main.
- Only add/update the
-
iOS per
references/ios.md: podspec15.0,Package.swift.iOS(.v15),capacitor-swift-pmfrom: "8.0.0". If the plugin posted.capacitorViewDidAppear/.capacitorViewWillTransitionitself, remove that code; Capacitor 8 emits them. -
Upgrade the example app via
capacitor-app-upgrade-v7-to-v8, bump the plugin major, note "Requires Capacitor 8".
After 8.x: next steps
- Capacitor 8.5 apps adopt the iOS UIScene lifecycle (required by Xcode 27). Plugins that hook AppDelegate methods (
application(_:open:options:),continue userActivity,applicationDidBecomeActive, ...) or useUIApplication.shared.windows/keyWindowmust handle scene-based apps; seecapacitor-uiscene-migration. - Then
capacitor-plugin-upgrade-v8-to-v9(Capacitor 9 is onnext, not GA).
Verification
grep -n "\"@capacitor/" package.json # ^8.0.0 / >=8.0.0
grep -nE "^\s*(namespace|compileSdk|url|abortOnError|minSdkVersion|targetSdkVersion) [^=]" android/build.gradle # expect none
grep -n "kotlinOptions\|kotlin-android-extensions" android/build.gradle # expect none
grep -n "VERSION_21\|gradle:8.13.0" android/build.gradle
grep -n "distributionUrl" android/gradle/wrapper/gradle-wrapper.properties # gradle-8.14.3
grep -rn "bridge_layout_main" android/src | grep -v capacitor_bridge # expect none
grep -n "deployment_target" *.podspec # '15.0'
grep -n "iOS(\|capacitor-swift-pm" Package.swift 2>/dev/null # .v15, from: "8.0.0"
npm run build
npm run verify # if the repo has the template verify scripts
cd android && ./gradlew build --warning-mode all
Run the example app on both platforms.
Error Handling
| Error | Fix |
|---|---|
Properties should be assigned using the 'propName = value' syntax | Add = to the property assignment. |
Kotlin: kotlinOptions deprecated / error under Kotlin 2.2 | Use kotlin { compilerOptions { jvmTarget = JvmTarget.JVM_21 } } with import org.jetbrains.kotlin.gradle.dsl.JvmTarget. |
Plugin [id: 'kotlin-android-extensions'] was not found | Remove it; use kotlin-parcelize and view binding. |
Inconsistent JVM-target compatibility detected for tasks | Make Java compileOptions and Kotlin jvmTarget the same version (21). |
cannot find symbol on R.layout.bridge_layout_main | Use capacitor_bridge_layout_main. |
| SPM resolution picks Capacitor 7 | Set capacitor-swift-pm from: "8.0.0". |
FAQ
What does the capacitor-plugin-upgrade-v7-to-v8 skill do?
Upgrades a Capacitor plugin library from v7 to v8 using npx @capacitor/plugin-migration-v7-to-v8@latest, then the manual checklist - dev deps ^8.0.0 and peer @capacitor/core =8.0.0, minSdk 24 and compile/target SDK 36 defaults, AndroidX dependency defaults, AGP 8.13.0, Gradle 8.14.3, Gradle = property assignment syntax, Java 21, Kotlin 2.2.20 (kotlinOptions to compilerOptions, no kotlin-android-extensions), google-services 4.4.4, iOS 15 in podspec and Package.swift, capacitor-swift-pm from: "8.0.0", and the renamed capacitorbridgelayoutmain resource. Use when a plugin targets Capacitor 7 and must support 8, or on Kotlin 2 / Gradle space-assignment errors. Points to the v8-to-v9 next step. Do not use for app upgrades, other major versions, or non-Capacitor libraries.
How do I install capacitor-plugin-upgrade-v7-to-v8?
Run npx skills add https://github.com/cap-go/capgo-skills --skill capacitor-plugin-upgrade-v7-to-v8 in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/capacitor-plugin-upgrade-v7-to-v8/ (personal) or .claude/skills/capacitor-plugin-upgrade-v7-to-v8/ (project).
Which AI agents can use capacitor-plugin-upgrade-v7-to-v8?
Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.
Is capacitor-plugin-upgrade-v7-to-v8 safe to install?
No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.
Who maintains capacitor-plugin-upgrade-v7-to-v8?
It is published by cap-go in cap-go/capgo-skills. It has 647 recorded installs.
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