# Black Meridian: The Infinite AI-Powered Board > Visualize logic, parallel thinking, and break free from linear constraints. Black Meridian is an infinite board designed for advanced users who demand more than a linear chat interface. It is a spatial environment that allows you to map out complex logic, run parallel thought processes, and synthesize ideas in a completely non-linear way. ## Key Concepts & Functionality * **Infinite Board**: A boundless board to visualize your workflows, brainstorms, and logic maps. * **Visual Logic Mapping**: Connect ideas, AI responses, and notes with lines and labels to build a tangible map of your thought process. * **Parallel Thinking**: Run multiple AI queries side-by-side, split chats into branches to explore alternative ideas, and visually compare results. * **Spatial Organization**: Group ideas into visual zones, collapse long threads into sticky notes, and keep complex projects perfectly tidy. ## Node Types Explained Black Meridian utilizes different modular "Nodes" that you can place, connect, and interact with anywhere on the board: * **Chat Nodes**: The core conversational building blocks. Query state-of-the-art AI models, follow up on thoughts, and use infinite branching to split conversations into parallel realities. When a chat gets too long, minimize it into a compact, color-coded sticky note. * **System Prompt Nodes**: Command modules that define the AI's behavior. Connect a System Prompt to any number of Chat Nodes to give them a specific persona, strict formatting rules, or specialized instructions. * **File Nodes**: Your context injectors. Upload reference materials directly to the board. Depending on your plan, you can drop in text files, PDFs, or images, and link them to your chats so the AI has exactly the context it needs. * **Sticky Note Nodes**: Your personal thoughts and highlights. Extract key insights directly from AI chats with a single click, or create blank notes to outline your own structural plans and keep your visual map organized. ## Pricing Plans & Features ### Free Plan Experience the paradigm shift of spatial AI organization. Perfect for exploring visual logic mapping and experiencing non-linear brainstorming. * **Includes**: 1 Active Board, up to 30 nodes per board. * **AI Access**: Fast and efficient models like Gemini 3.5 Flash and Gemini 3.1 Flash-Lite. * **Capabilities**: Text file uploads (up to 2MB), 2 branches per node, and standard history retention. ### Pro Plan - $20/month The definitive single-player research and brainstorming environment. Remove all limits and gain the tools you need for deep, complex workflows. * **Includes**: Unlimited Boards and Unlimited Nodes. * **Premium AI**: Unfettered access to state-of-the-art models like Gemini 3.1 Pro and Gemini 2.5 Pro. * **Advanced Context**: Upload large PDFs and high-resolution images (up to 40MB per file). * **Power Tools**: Infinite branching & merging ("Fan Opening/Closing"), Visual Zones for grouping concepts, Edge Labels for mapping logical relationships (e.g., "Contradicts", "Supports"), and Board Snapshots to safely experiment and revert changes. * **Auto-Tidy**: Instantly align messy boards into neat grid or tree structures with a single click. ### Max Plan - $45/month (Coming Soon) For enterprise visionaries and hardcore power users. * **Future Features**: Bring Your Own Key (BYOK) for local/custom models, Real-time Multiplayer Collaboration, API Access & Custom Node Scripting, Massive Context Windows (1M+ Tokens), and Automated Board Workflows. ## Application Architecture & Pages Black Meridian is structured across several key routes. Below is the complete sitemap mapping the application's available pages: - **[Landing Page](https://meridian-black.com/)**: The primary public-facing introduction to Black Meridian, featuring our product vision and access points. - **[App Workspace](https://meridian-black.com/app)**: The core infinite board workspace where logged-in users interact with AI nodes, visualize logic, and run parallel reasoning tasks. - **[Login](https://meridian-black.com/login)**: Secure user authentication portal. - **[Register](https://meridian-black.com/register)**: Portal for new users to create their Black Meridian account. - **[User Profile](https://meridian-black.com/user)**: User dashboard to manage account settings and personal details. - **[Billing & Pricing](https://meridian-black.com/billing)**: Secure management of subscription tiers, payment methods, and an overview of Pro and Max plan upgrades. - **[Instructions](https://meridian-black.com/instructions)**: Detailed user guides and documentation on how to master the infinite board interface, spatial logic, and branching features. - **[Articles Directory](https://meridian-black.com/articles)**: Index of educational resources and deep-dives about spatial computing and prompt architectures. - **[Unlocking Parallel Thinking](https://meridian-black.com/articles/unlocking-parallel-thinking-in-ai)**: Article explaining how infinite board reasoning models outperform linear chats. - **[Visual Logic Mapping](https://meridian-black.com/articles/visual-logic-mapping)**: Guide detailing agent orchestration and edge labels. - **[Spatial Context Management](https://meridian-black.com/articles/spatial-context-management)**: Deep-dive into spatial memory, note extraction, and cognitive load. - **[Terms of Service](https://meridian-black.com/terms)**: Official user agreement and terms. - **[Privacy Policy](https://meridian-black.com/privacy)**: Details on data handling, security, and user privacy protections. - **[Refund Policy](https://meridian-black.com/refund)**: Guidelines and policies regarding subscription cancellations and refunds.