LangServe Assistant UI is a modular front-end application built with React and TypeScript that interfaces seamlessly with the LangServe backend to deliver a full-featured conversational AI experience. It provides customizable chat windows, real-time message streaming, context-aware prompts, multi-agent orchestration, and plugin hooks for external API calls. The UI supports theming, localization, session management, and event hooks for capturing user interactions. It can be embedded into existing web applications or deployed as a standalone SPA, enabling rapid rollout of customer service bots, content generation assistants, and interactive knowledge agents. Its extensible architecture ensures easy customization and maintenance.