docs: add Capacitor 9 app upgrade guide - #589
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Covers app-level changes only (Cordova-optional, CLI, Android/iOS breaking changes, upgrade steps, plugin summary). Deprecated-API removal tables and the plugin-author guide are tracked separately (RMET-4728, RMET-5321). RMET-5320
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andredestro
marked this pull request as ready for review
August 11, 2026 15:54
andredestro
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ItsChaceD,
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theproducer
August 11, 2026 16:07
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Description
Adds
docs/main/updating/9-0.md, the "Updating to 9.0" app upgrade guide, and registers it in the Upgrade Guides sidebar (sidebars.js).Covers app-level changes only:
@capacitor/cli(--urlreplacing the separate live-reload flags)@capacitor/android(minSdk 26, compileSdk/targetSdk 37, AGP 9.2.1 / Gradle 9.5.1, theproguard-android.txtrename,androidx.core1.19 /core-ktx, removing standalone Kotlin plugin references,jcenter()removal)@capacitor/ios(deployment target 16.0,@mainreplacing@UIApplicationMain, a pointer to the 8.5 guide for UIScene if updating from 8.4 or earlier)Using the CLI to Migrate, and the manual iOS/Android upgrade steps (Xcode, Android Studio,variables.gradle, Gradle wrapper, google-services)Change Type
Rationale / Problems Fixed
Capacitor 9 needs an "Updating to 9.0" guide before GA so app developers upgrading from 8.x have a single place documenting breaking changes and migration steps, and so Capacitor CLI and other components can link to it.
Internal Jira reference: https://outsystemsrd.atlassian.net/browse/RMET-5320
Tests or Reproductions
Content was cross-checked against the actual merged PRs in
ionic-team/capacitorandionic-team/capacitor-plugins(and sibling plugin repos) that introduce each breaking change, plus the currentnextbranch state of the Android/iOS templates (variables.gradle,app/build.gradle,Podfile, etc.) to confirm the exact version numbers. Verifiednpm run build(Docusaurus) succeeds and the new page renders at/next/updating/9-0/with no broken links.Note: Capacitor 9 hasn't reached GA yet, so the guide's install instructions point at the
nextdist-tag (@capacitor/cli@next) rather than@latest.Screenshots / Media
N/A
Platforms Affected