Home / cap-go / capgo-skills · GitHub

capacitor-app-upgrade-v8-to-v9 SKILL.md skillA

This file is byte-identical to the first copy the registry indexed. Same content hash, so the same checks give both the same grade.

capacitor-app-upgrade-v8-to-v9 from cap-go/capgo-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned

mdr add cap-go/capgo-skills/capacitor-app-upgrade-v8-to-v9@git:20261011.86834d4

Pins git:20261011.86834d4 in mdr.lock. Pin the fingerprint instead.

Audit grade: A, 17 of 17 checks passed
Kind: SKILL.md skill
Repository: cap-go/capgo-skills
Path: plugins/capacitor-app-upgrades/skills/capacitor-app-upgrade-v8-to-v9/SKILL.md
Versions recorded: 1
Latest version: git:20261011.86834d4, committed Oct 11, 2026
Size: 7,651 bytes
Repository stars: 74
License: MIT

Upgrades a Capacitor app from v8 to v9 (prerelease, installed with @next until GA). Covers preflight (Node 24, Xcode 27, Android Studio 2026.1.1, UIScene adoption from 8.5), `npx cap migrate`, and the manual checklist - iOS 16 target, @UIApplicationMain to @main, removed CAPBridge APIs, AGP 9.2.1, Gradle 9.5.1, SDK 37/minSdk 26, gradle.properties cleanup, built-in Kotlin, jcenter removal, core-ktx, proguard-android.txt rename, optional Cordova runtime, `cap run --url`, push `alert` removal…

Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.

What the file says

# Capacitor App Upgrade v8 to v9

Capacitor 9 is a prerelease (`next` dist-tag, 9.0.0-alpha.x as of October 2026). Install with `@next`; switch to `@latest` / `^9.0.0` once 9.0.0 is GA. Tell the user it is not GA before upgrading a production app, and work on a branch.

Canonical source: https://capacitorjs.com/docs/updating/9-0

## When to Use

TRIGGER when:
- App is on `@capacitor/core` 8.x and the user wants Capacitor 9
- Build errors after moving to Xcode 27 / Swift 6, AGP 9, or Gradle 9 in a Capacitor 8 app
- `npx cap run -l --host ...` no longer works (`--url` replaced it)
- Push notifications `presentationOptions: ['alert']` stopped showing banners on iOS
- Cordova-plugin-free app fails on `CapacitorCordova` / `com.getcapacitor.cordova` references after upgrading

Do not use:
- App still on 7 or older -> `capacitor-app-upgrades` (chain majors first)
- Only the 8.4 -> 8.5 UIScene step -> `capacitor-uiscene-migration`
- Plugin library repo -> `capacitor-plugin-upgrade-v8-to-v9`
- CocoaPods to SPM move -> `cocoapods-to-spm` (recommended, separate step)

## Live Project Snapshot
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint

mdr add cap-go/capgo-skills/capacitor-app-upgrade-v8-to-v9@sha256:0db4f9d5999521c3

The line at the top of this page pins the label git:20261011.86834d4, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.

Badge

[![mdr](https://markdownregistry.com/badge/art_xshlme6omnfnccvd.svg)](https://markdownregistry.com/a/art_xshlme6omnfnccvd)

2 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 1 version of this file, committed on Oct 11, 2026.

version	committed	commit	size	audit
git:20261011.86834d4 latest	2026-10-11	86834d4	7,651 B	A	view

Audit of the latest version

A 17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.

pass: Frontmatter block present
pass: Frontmatter declares a name
pass: Frontmatter declares a description
pass: Size between 200 bytes and 200 KB (7651 bytes)
pass: No zero-width or bidi control characters
pass: No instruction hidden inside an HTML comment
pass: No link to an exfiltration or paste host
pass: No credential-shaped string
pass: No instruction to send local credentials anywhere
pass: No text hidden with inline styles
pass: No prompt-injection phrasing
pass: No curl or wget piped into a shell
pass: No recursive delete of root, home or parent
pass: No instruction to read or print local credentials
pass: No base64 blob over 200 characters
pass: No link to a raw IP address
pass: No script tag

Source

GitHub

cap-go/capgo-skills · 74 stars · license MIT · pushed 2026-10-17 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_xshlme6omnfnccvd
GET https://markdownregistry.com/api/v1/resolve?ref=cap-go/capgo-skills/capacitor-app-upgrade-v8-to-v9
GET https://markdownregistry.com/api/v1/blob/0db4f9d5999521c3543620ed9ae6c649068024707bf44cc3c1ba306de53f708a

Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.

Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.

More from cap-go/capgo-skills

AGENTS.md AGENTS.md file

cap-go/capgo-skills · AGENTS.md

git:20260611.b65524b · audit B · 74 stars

CLAUDE.md CLAUDE.md file

cap-go/capgo-skills · CLAUDE.md