No core modification architecture: plugin layer loads before Sngine and keeps custom logic outside core files. Update-safe deployment: core upgrades do not remove plugin folders or plugin registry state. Central lifecycle management: install, enable, disable, and uninstall from one admin screen. Manifest-driven validation: each plugin is discovered and verified through plugin.json metadata. Hook and filter API: plugins can subscribe to request, AJAX, and output-buffer events without template edits. Fail-safe loading: plugin runtime is designed to avoid full-site crash from one plugin failure. Admin integration path: plugin settings pages are accessible directly from /admincp/helptor. Multi-environment support: works on shared hosting and VPS with correct auto_prepend_file setup. Documentation: https://helptor.in/doc