gsd-update

<objective> Check for GSD updates, install if available, and display what changed. Routes to the update workflow which handles: - Version detection (local vs global installation) - npm version checking - Changelog fetching and display - User confirmation with clean install warning - Update execution and cache clearing - Restart reminder </objective> <execution_context> @${CLAUDE_PLUGIN_ROOT}/workflows/update.md </execution_context> <process> **Follow the update workflow** from `@${CLAUDE_PLUGIN_ROOT}/workflows/update.md`. The workflow handles all logic including: 1. Installed version detection (local/global) 2. Latest version checking via npm 3. Version comparison 4. Changelog fetching and extraction 5. Clean install warning display 6. User confirmation 7. Update execution 8. Cache clearing </process>