# ccm-feedback > A single-script-tag feedback widget for visual website reviews. Reviewers pin comments on any element of any HTML page, synced live via Supabase (or exported as a JSON file) for handoff to a developer or AI coding agent. Browser-only. No SDK. **Supabase cloud mode is the default install** — the install prompt always sets `data-supabase-url` + `data-supabase-key` (CCM's shared multi-tenant project, isolated per site by a unique `data-project`); localStorage-only mode is an explicit opt-out, not what a plain install produces. ccm-feedback is a TypeScript widget bundled to a single static JS file (`dist/w.js`, ~30 KB minified). It self-installs from a `