super_editor is a Flutter framework for building configurable rich text editors, read-only document viewers, and chat/messaging UIs. It provides a document model based on nodes and attributed spans, a single-column layout engine, platform-specific selection/caret/toolbar controls, IME integration, and serialization to/from Markdown, HTML, and Quill Delta. The repository is a monorepo containing the core super_editor package plus supporting packages: attributed_text, super_text_layout, super_keyboard, super_editor_clipboard, and super_editor_spellcheck. It is used in production by apps such as Superlist and ClickUp, and includes example clones of Google Docs, Slack, Quill, Bear, Obsidian, Medium, and iOS Messenger.