Starter Kit Upgrade

If you've ever bootstrapped a Laravel project from one of the official starter kits and then customized it, you know the pain of pulling in upstream improvements months later. This skill does the hard part: it cherry-picks individual features from the upstream kit (like toast notifications or a 2FA fix) into your project on a dedicated branch, one commit per feature. It won't auto-merge files you've customized, won't touch your current branch until you're ready, and bails if your tests break. The safety contract is strict: clean working tree required, no silent overwrites of package manifests, and it detects whether you're on Fortify or WorkOS, with or without teams, before doing anything.