Comprehensive plan covering:
- Directory structure: /plugins/{platform}/source/ and /dist/
- Database models: Plugin, PluginVersion, PluginInstallation
- API endpoints for download, check-update, register, health-check
- WordPress auto-update mechanism via pre_set_site_transient_update_plugins hook
- Build scripts for ZIP generation with versioning
- Security: signed URLs, checksums, rate limiting
- Future-ready for Shopify and custom site integrations
- Monitoring and analytics dashboard widgets
- 5-phase implementation roadmap
