upgrade-detect

name	upgrade-detect
description	Re-probe the local GIMP install and update the saved profile if version, binary path, or install type has changed. Use after `apt upgrade`, `flatpak update`, `snap refresh`, replacing an AppImage, or when another skill reports a stale binary.

Upgrade Detect

Refresh the profile written by onboard.

Steps

1. Read the current profile from $DATA_ROOT/config.json (resolver: ${CLAUDE_USER_DATA:-${XDG_DATA_HOME:-$HOME/.local/share}/claude-plugins}/gimp).
2. Re-run the probe sequence from onboard (native → flatpak → snap → appimage).
3. Diff the new probe against the saved profile. If anything changed (binary path, version, install type, config dir for major-version bump), write a new config.json and report the diff.
4. If GIMP went from 2.x to 3.x, warn the user that scripts/plug-ins under the old config_dir need to be migrated — GIMP 3 changed the Script-Fu interpreter and Python plug-in API.
5. If GIMP appears to have been uninstalled, mark the profile stale ("install_type": null) and tell the user.