dsh-index-live: Live Online Broad Market Index Quotes

The DSH plugin `dsh-index-live` is designed to provide real-time overall market index data support for agents. It retrieves the latest market data over the network, is implemented in pure Node.js, and requires no additional network-related dependencies. It must be installed using the official command; after installation, the tool can be invoked directly within a session to assist agents with analysis and decision-making. Before use, ensure the required environment dependencies are satisfied, and review the source code to verify its security.