Contentta

Contentta is a modern, open-source CMS with AI-powered editing capabilities—think Cursor, but for content creation. Built on a scalable monorepo architecture, it features an intelligent Lexical-based editor with inline completions, agentic text editing, and a chat assistant to help you write, refine, and publish content faster.

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✨ Key Features

✍️ AI-Powered Content Editor

Built on Lexical with deeply integrated AI assistance at multiple levels:

• FIM (Fill-in-the-Middle) Completions:

  • Copilot Mode: Inline ghost text suggestions as you type
  • Cursor Tab Mode: Multi-line floating panel suggestions
  • Diff Mode: Side-by-side replacement previews
  • Auto-triggers on typing pauses, cursor movement, punctuation, and newlines
  • Accept with Tab, dismiss with Escape, manual invoke with Ctrl+Space

• Inline Edit (Ctrl+K):

  • Select text and press Ctrl+K to open a floating prompt
  • Enter natural language instructions to transform selected text
  • Streaming AI responses replace the original selection
  • Full document context awareness for coherent edits

• Chat Assistant (Ctrl+L):

  • Opens a right-side chat panel for interactive content discussion
  • Send selected text as context to the AI
  • Full document and selection context tracking
  • Real-time streaming responses

📝 Rich Content Management

• Block-Based Editor:

  • Tables, code blocks, horizontal rules, links, and checklists
  • Drag-and-drop content organization
  • Markdown shortcuts with extended transformers
  • Smart paste handling for format preservation

• Content Lifecycle:

  • Draft, published, and archived states
  • Auto-save with debouncing
  • Bulk operations (delete, publish, archive)

• SEO & Metadata:

  • Title, description, slug, and keyword management
  • SEO optimization built into the workflow

🤖 AI Writers & Agents

• Writer Personas:

  • Create custom AI writing personas with profile photos
  • Define writing guidelines, audience profiles, tone, and style preferences
  • Associate writers with content for consistent voice

• Multi-Agent Orchestration (Mastra-powered):

  • Content Agents: Editor, Writer, and Reader agents
  • Specialized Agents: Researcher (Tavily web search), Strategist, Document Generator
  • Workflows: Automated article and changelog creation pipelines
  • Knowledge Base: Brand knowledge, competitor analysis, writing guidelines

📊 Dashboard & Analytics

• Home Dashboard: Content statistics, quick actions, recent content
• Content List: Data table with search, filtering, sorting, and bulk operations
• Writer Management: Statistics, analytics, and detailed writer pages

🔐 Administration & Security

• Authentication:

  • Email/password and Google OAuth via Better Auth
  • Magic link authentication
  • Two-factor authentication (2FA)
  • Session management with device tracking

• Multi-tenant Architecture:

  • Organization workspaces
  • Team management and member invitations
  • Role-based access control (Owner, Admin, Member)

• Settings:

  • Profile and security management
  • Theme switching (Light/Dark/System)
  • Language support (en-US, pt-BR)
  • API keys management
  • Notification preferences
  • Billing integration (Stripe)

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🚀 Tech Stack

Contentta is a full-stack application built within an Nx monorepo using Bun.

Category	Technology
Frontend	React, Vite, TypeScript, TanStack Router, TanStack Query, shadcn/ui, Tailwind CSS
Editor	Lexical (Rich text editor framework)
AI	Vercel AI SDK, Mastra (Agent orchestration)
Backend	ElysiaJS, Bun, tRPC, Drizzle ORM, PostgreSQL
Auth	Better Auth
Jobs	BullMQ, Redis
Storage	MinIO (S3 compatible for file/media storage)
Security	Arcjet (Rate limiting & DDoS protection)
Analytics	PostHog
Email	Resend (Transactional emails)
Landing	Astro (Static marketing site)
Tooling	Nx, Biome, Docker, Husky

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📂 Project Structure

This project is a monorepo managed by Nx.

Apps (apps/)

The deployable applications and websites.

apps/
├── dashboard/     # React/Vite SPA - main content editor interface
├── server/        # Elysia backend API server
├── worker/        # BullMQ background job processor
└── landing-page/  # Astro marketing website

• dashboard: The core CMS single-page application (SPA) built with React, featuring the AI-powered content editor with file-based routing via TanStack Router.
• server: The ElysiaJS backend server providing the tRPC API, authentication endpoints, AI integrations, and file storage.
• worker: Background job processor using BullMQ for handling async tasks like AI processing, email delivery, and content scheduling.
• landing-page: Astro-based static marketing site with i18n support (Portuguese/English).

Packages (packages/)

Shared internal libraries organized by concern. All packages use explicit exports in package.json.

Core Services

Package	Purpose
api	tRPC routers and type-safe API layer
authentication	Better Auth setup with OAuth, magic links, 2FA
database	Drizzle ORM schemas and repositories
environment	Zod-validated environment variables
logging	Structured logging with Pino and Logtail

External Integrations

Package	Purpose
arcjet	Rate limiting and DDoS protection
cache	Redis caching layer
files	MinIO S3-compatible file storage
posthog	Analytics tracking (client & server)
queue	BullMQ job queue abstractions
stripe	Stripe payments SDK wrapper
transactional	React Email templates with Resend

Feature Modules

Package	Purpose
encryption	E2E encryption with NaCl (TweetNaCl)
notifications	Push notifications and alerts
workflows	Content workflow automation

Frontend

Package	Purpose
localization	i18next with en-US/pt-BR support
ui	Radix + Tailwind component library

Utilities

Package	Purpose
utils	Shared utilities (dates, formatting, errors)

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🤝 Contributing

Contributions are what make the open-source community such an amazing place to learn, inspire, and create. Any contributions you make are greatly appreciated.

Please read our CONTRIBUTING.md for details on our code of conduct and the process for submitting pull requests.

📜 License

This project is licensed under the Apache-2.0 License. See the LICENSE.md file for details.