update readme

Author: rejojer

README.md

@@ -280,9 +280,9 @@ PageIndex Blog, Sep 2025.
 </details>
 
 
-### 🌐 Ecosystem
+### 🌐 Open-Source Ecosystem
 
-Other [open-source projects](https://docs.pageindex.ai/open-source) from the PageIndex ecosystem: [OpenKB](https://github.com/VectifyAI/OpenKB) is an LLM knowledge base that compiles documents into an interlinked wiki. [ChatIndex](https://github.com/VectifyAI/ChatIndex) brings tree indexing and retrieval to long conversational histories. [ConDB](https://github.com/VectifyAI/ConDB) is a KV-cache native context database for tree-based retrieval. [PageIndex MCP](https://github.com/VectifyAI/pageindex-mcp) is PageIndex's MCP server.
+PageIndex anchors a growing open-source [ecosystem](https://docs.pageindex.ai/open-source) of **long-context AI infra** — [OpenKB](https://github.com/VectifyAI/OpenKB) is an LLM knowledge base that compiles documents into an interlinked wiki. [ChatIndex](https://github.com/VectifyAI/ChatIndex) provides tree indexing and retrieval for long conversational histories and memory. [ConDB](https://github.com/VectifyAI/ConDB) is a KV-cache native context database for tree-based retrieval at scale. [PageIndex MCP](https://github.com/VectifyAI/pageindex-mcp) is PageIndex's MCP server.
 
 ### Connect with Us