What problem does it solve? Keeping a locally installed Claude Code plugin current requires manually pulling the marketplace repository, copying files into the versioned plugin cache, and editing installed_plugins.json by hand, which is error-prone and easy to forget. ## Core Features & Use Cases - Automated version upgrade: Fetches the latest marketplace repo, installs the new version into the plugin cache, and updates installed_plugins.json with the new version and git commit SHA. - Dev symlink protection: Detects a development symlink install and stops the upgrade so local source work is never overwritten. - Inline upgrade prompts: Handles UPGRADE_AVAILABLE signals emitted by other skills at startup and continues the original task afterward. - Use Case: When a user types "upgrade notfair", the skill saves the old version, installs the new one, cleans up old cache directories, and shows a What's New summary from the CHANGELOG. ## Quick Start Ask the assistant to upgrade notfair to the latest version and show what changed.