Add dsh-plugin topic

Author: liyangbing

topics/dsh-plugin/index.md

@@ -0,0 +1,11 @@
+---
+created_by: DeepSeek
+display_name: DeepSeek Harness Plugin
+github_url: https://github.com/deepseek-ai/deepseek-harness
+aliases: dsh-plugins
+related: deepseek, deepseek-harness, mcp, ai-agent, agent-harness, plugin-system
+short_description: DSH plugins extend DeepSeek Harness with tools, skills, interfaces, integrations, and runtime capabilities.
+topic: dsh-plugin
+---
+
+A DeepSeek Harness (DSH) plugin is an extension that participates in the Harness plugin-based composition. Plugins can add tools, model providers, skills, user interfaces, transports, storage, policies, and integrations without changing the core runtime. Repositories use the `dsh-plugin` topic to identify extensions and compatible projects for the DeepSeek Harness ecosystem.