docs: rephrase mycelium instead of threefold

docs/home.md

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+
+# Project Mycelium Documentation
+
+Welcome to the official documentation for **Project Mycelium**.
+
+This site is organized around the core building blocks of the Mycelium stack:
+
+- **Network** – The Mycelium IPv6 overlay network for secure, encrypted connectivity.
+- **Cloud** – Mycelium Cloud for Kubernetes clusters on decentralized infrastructure.
+- **VDC** – Virtual Data Centers for full cloud environments you control.
+- **AI Agent Framework** – Mycelium Agents (coming 2026) for sovereign, distributed AI.
+- **Hosters** – Individuals and organizations who contribute capacity to the grid.
+
+Use the top navigation to jump directly to any of these areas.
+
+## Who This Documentation Is For
+
+- **Developers** who want to build on the Mycelium Network and Mycelium Cloud.
+- **Organizations** who need sovereign cloud, data residency, and compliance.
+- **Hosters** (formerly called "farmers" in legacy grid docs) who want to run nodes and earn rewards.
+
+## High-Level Architecture
+
+At a high level, Project Mycelium combines:
+
+1. **Mycelium Network**  
+   A cryptographic IPv6 overlay that connects devices, nodes, and clusters in a secure peer-to-peer mesh.
+
+2. **Mycelium Cloud**  
+   A platform to deploy Kubernetes clusters on Mycelium's decentralized infrastructure, using Mycelium Network for connectivity.
+
+3. **Virtual Data Centers (VDCs)**  
+   Composable environments built on top of Mycelium Cloud for applications, databases, internal services, and full personal/organizational clouds.
+
+4. **AI Agent Framework**  
+   A forthcoming framework that lets you run private, distributed AI agents inside environments you control.
+
+5. **Hosters**  
+   Node operators who provide compute, storage, and network capacity to the ecosystem and earn rewards for doing so.
+
+Each section of this documentation dives into one of these layers.
+
+## Where to Start
+
+- If you want **secure networking between devices and clusters**:
+  - Start with **[Network](/network)**.
+
+- If you want to **deploy Kubernetes clusters on decentralized infrastructure**:
+  - Start with **[Cloud](/cloud)**.
+
+- If you are a **hoster / farmer** interested in running nodes and earning SPORE:
+  - Start with **[Hosters](/hosters)**.
+
+- If you want to understand how **Virtual Data Centers** and the **AI Agent Framework** fit in:
+  - Read the overviews for **[VDC](/vdc)** and **[AI Agent Framework](/ai-agent-framework)**.
+
+## Related Resources
+
+- **Main website** – [www.projectmycelium.com](https://www.projectmycelium.com)
+- **Mycelium Cloud** – [myceliumcloud.tf](https://myceliumcloud.tf)