capacitor-plugin-upgrades
Routes and drives a Capacitor plugin library upgrade across one or more major versions (4 to 9), including the iOS UIScene lifecycle audit that Capacitor 8.5 and 9 require. Detects the supported Capacitor range, plans hops (e.g. 7 to 8 to 9), runs each official plugin migrator, delegates to the per-version skill, and verifies TypeScript, Android, iOS (podspec and Package.swift) and the example app. Use for "upgrade my plugin to the latest Capacitor", "support Capacitor 9 in my plugin", bumping peerDependencies, or multi-version plugin jumps. Do not use for app projects (use capacitor-app-upgrades) or non-Capacitor plugin frameworks.
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- 732
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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-upgrades- 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-upgrades 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 (router)
Plan and run a plugin upgrade one major at a time, using the version-specific skill for each hop.
When to Use
TRIGGER when:
- Plugin maintainer wants support for a newer Capacitor major and the hop count is unclear
peerDependencies["@capacitor/core"]lags the app's Capacitor version- Users of the plugin report it breaks on Capacitor 8.5 scene-based apps or on Capacitor 9
Do not use:
- App projects ->
capacitor-app-upgrades - Adding SPM to a plugin ->
capacitor-plugin-spm-support - Cordova plugin to Capacitor plugin conversion ->
cordova-to-capacitor
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 \( -path './example-app' -o -path './ios' -o -path './android' -o -name 'capacitor.config.json' -o -name 'capacitor.config.ts' -o -name 'capacitor.config.js' \)
Version Map (October 2026)
| Hop | Skill | Notes |
|---|---|---|
| 4 -> 5 | capacitor-plugin-upgrade-v4-to-v5 | |
| 5 -> 6 | capacitor-plugin-upgrade-v5-to-v6 | |
| 6 -> 7 | capacitor-plugin-upgrade-v6-to-v7 | |
| 7 -> 8 | capacitor-plugin-upgrade-v7-to-v8 | iOS 15, SDK 36, AGP 8.13 |
| 8.5 lifecycle | capacitor-uiscene-migration (references/plugin-audit.md) | Audit only; no version bump needed if the plugin follows the one-release rules |
| 8 -> 9 | capacitor-plugin-upgrade-v8-to-v9 | npx @capacitor/plugin-migration-v8-to-v9@latest, iOS 16, SDK 37, AGP 9.2.1, API removals |
Capacitor 9 is a prerelease (next tag, 9.0.0-alpha.x). Use next / >=9.0.0-alpha.6 ranges until GA; consider publishing the plugin's v9 release under the npm next tag too. Ask the user before dropping support for the current stable major.
Procedure
- Detect the supported range (peer dependency,
Package.swiftcapacitor-swift-pmrequirement, podspecCapacitordependency,android/build.gradledefaults). Confirm the target major with the user. - Plan hops, one major at a time. When crossing 8 -> 9, run the UIScene plugin audit as part of the hop. Example: 7 -> 9 = 7->8, UIScene audit, 8->9.
- Per hop: clean git tree, load the hop skill, run its official migrator first (
npx @capacitor/plugin-migration-v<from>-to-v<to>@latestwhere the skill names one), review the diff, finish the manual checklist, then verify (step 5) before the next hop. - Surface area to re-check every hop: TypeScript definitions and exported names, native method signatures and payloads, Android namespace and Java/Kotlin toolchain, iOS deployment target in podspec and
Package.swift(keep both), README install and compatibility table. - Verify in the plugin root and in the example app.
Verification
If npm run verify exists, run it. Otherwise:
npm run build
npm test --if-present
cd android && ./gradlew clean build && cd ..
xcodebuild -scheme <PluginScheme> -destination 'generic/platform=iOS Simulator' build # find it with xcodebuild -list
cd example-app && npm install && npx cap sync && npx cap run ios && npx cap run android
Run npx cap sync and native runs from the example/test app, not the plugin root. Exercise each public method on every shipped platform.
Error Handling
- Migrator for the hop fails or misses files -> finish manually from the hop skill before the next major.
- Example app breaks -> fix plugin API or native wiring before publishing.
- Consumers on CocoaPods and SPM both report issues -> check podspec and
Package.swiftdeclare the same platform and Capacitor range. - Plugin breaks only in scene-based apps -> AppDelegate-method or
tmpWindowassumptions; seecapacitor-uiscene-migration.
FAQ
What does the capacitor-plugin-upgrades skill do?
Routes and drives a Capacitor plugin library upgrade across one or more major versions (4 to 9), including the iOS UIScene lifecycle audit that Capacitor 8.5 and 9 require. Detects the supported Capacitor range, plans hops (e.g. 7 to 8 to 9), runs each official plugin migrator, delegates to the per-version skill, and verifies TypeScript, Android, iOS (podspec and Package.swift) and the example app. Use for "upgrade my plugin to the latest Capacitor", "support Capacitor 9 in my plugin", bumping peerDependencies, or multi-version plugin jumps. Do not use for app projects (use capacitor-app-upgrades) or non-Capacitor plugin frameworks.
How do I install capacitor-plugin-upgrades?
Run npx skills add https://github.com/cap-go/capgo-skills --skill capacitor-plugin-upgrades 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-upgrades/ (personal) or .claude/skills/capacitor-plugin-upgrades/ (project).
Which AI agents can use capacitor-plugin-upgrades?
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-upgrades 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-upgrades?
It is published by cap-go in cap-go/capgo-skills. It has 732 recorded installs.
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