LobeHub/LobeChat is an open-source AI agent orchestration platform delivered as a full-stack monorepo. It provides a web SPA (Next.js), an Electron desktop application, a CLI tool, and a server backend. The system enables multi-model AI chat, agent definitions with built-in and MCP tool integration, user memory and knowledge bases, evaluation workflows, and acceptance testing. The architecture is modular with packages for model runtime, built-in tools, database (Drizzle ORM + PostgreSQL), prompts, and state management (Zustand). Key entry points include the Next.js app routes, tRPC routers for server-side logic, Hono API for agent execution and workflows, and the Electron main process for desktop features. Data flows involve user messages routed through an agent runtime that coordinates LLM providers, tool execution, and response streaming. External dependencies include PostgreSQL, Redis, S3-compatible storage, various LLM APIs, Upstash QStash for background workflows, and optional Elasticsearch for full-text search.

Lobe Midjourney Web UI is a Next.js application that provides a web interface for generating images using Midjourney via a proxy service. The application allows users to input prompts, generate images, view results, and perform variations/upscales. It can be used standalone or as a plugin within LobeChat. The architecture follows Next.js 14 app router conventions with Zustand for state management, API routes for proxying requests to midjourney-proxy, and a modular component structure using Ant Design. Key features include prompt input, image preview, task management, and settings configuration for the Midjourney proxy service.