Jotty (formerly rwMarkable) is a full-stack, self-hosted productivity application for managing notes, checklists, and Kanban boards. It uses Next.js 16 (App Router), React 19, and TypeScript with a file-based storage system (Markdown files with YAML frontmatter). Key features include rich text editing (TipTap with custom extensions for diagrams, callouts, mentions), drag-and-drop (custom DnD engine for Kanban, @dnd-kit for checklists), user management with multiple authentication methods (local, LDAP, OIDC), MFA (TOTP), encryption (PGP, XChaCha20), granular sharing with permission inheritance, version history via Git, full-text search using grep, audit logging, and a PWA with offline support. The architecture is server-first with Next.js server actions for all mutations and a WebSocket broadcast for real-time updates. The codebase is well-organized with a clear separation of concerns: global UI components, feature-specific components, server actions, types, utilities, and hooks. It has extensive test coverage (Vitest) across server actions, API routes, utilities, and security. While file-based storage imposes scalability limitations, the application demonstrates high craftsmanship in its modular design, custom drag-and-drop implementation, encryption handling, and sharing system. It is actively maintained with regular releases and community contributions.