#What is Manifest UI?

Manifest UI is a specialized, open-source collection of React components crafted for developers creating custom ChatGPT apps, agentic workflows, or any LLM-powered conversational interfaces who want high-quality, chat-optimized UI without designing from scratch. Its core value is delivering refined, shadcn/ui-compatible blocks and components that slot perfectly into modern stacks, enabling rapid prototyping and polished deployments of interactive chat experiences. Built on React with Tailwind CSS and Radix primitives via shadcn/ui, it's ideal for use-cases like building AI assistants, chatbot dashboards, multi-turn agent tools, or hybrid human-AI collaboration apps—anywhere elegant, responsive chat UIs can enhance engagement and usability.

#Features ⚡

• Official shadcn/ui Registry: Install components directly via the shadcn CLI for automatic setup and dependency alignment.

• Chat-Optimized Blocks: Pre-built sections for message threads, user/AI bubbles, tool calls, and streaming responses tailored to agentic flows.

• Customizable Primitives: Extend or override with Tailwind classes and variants for seamless branding integration.

• Conversational Patterns: Ready elements for inputs, attachments, markdown rendering, and dynamic content in chat contexts.

• Responsive & Accessible: Mobile-friendly layouts with ARIA support baked in via shadcn foundations.

• Open Contribution Model: GitHub-hosted for suggestions, bug reports, and new block submissions.

#Pros ✅

• Accelerates chat app development with purpose-built components that feel native to ChatGPT-style interfaces

• Perfect shadcn/ui compatibility means zero friction in existing projects

• Stunning, refined designs out of the box reduce styling time dramatically

• Completely free and open-source fosters community growth and custom extensions

• Focused scope ensures high-quality, non-bloated additions for LLM UIs

#Cons ⚠️

• Specialized for chat/agentic apps; less suited for general-purpose non-conversational UIs

• Requires shadcn/ui setup as a prerequisite for full registry benefits

• Smaller, curated collection compared to massive libraries—best as a targeted enhancer

#Included Components - Templates

Manifest UI provides a refined set of chat-focused building blocks and components via its registry: message display templates with user/assistant bubbles, timestamps, and markdown support; input bars with attachments and send controls; dynamic blocks for tool calls, streaming text, and multi-turn threads; conversational layouts like chat windows and sidebars; plus utility elements for avatars, status indicators, and error states—all optimized for agentic interactions and ready for shadcn CLI import.

#Pricing 💸

Manifest UI is entirely free and open-source, with no tiers, subscriptions, or costs—all components, blocks, and registry access are available unlimited for personal or commercial use. As a community-driven project, it relies on contributions rather than paid models.

#Integrations 🧰

Manifest UI integrates natively with shadcn/ui for primitives and CLI installation; React and Tailwind CSS for core development; Next.js or any React framework via the official registry—perfect for LLM backends like OpenAI, Vercel AI SDK, or custom agents.