Add exa plugin

.claude-plugin/marketplace.json

@@ -510,6 +510,20 @@
       },
       "homepage": "https://elixir-lsp.github.io/elixir-ls/"
     },
+    {
+      "name": "exa",
+      "description": "Exa AI web search, deep research, and content extraction. Provides MCP tools and research skills for comprehensive web search, people discovery, company research, academic papers, and more.",
+      "author": {
+        "name": "Exa"
+      },
+      "category": "productivity",
+      "source": {
+        "source": "url",
+        "url": "https://github.com/exa-labs/exa-mcp-server.git",
+        "sha": "bd2ccdd52ca7a35fbc2207ad266bb2a961c0e793"
+      },
+      "homepage": "https://exa.ai/docs/reference/exa-mcp"
+    },
     {
       "name": "explanatory-output-style",
       "description": "Adds educational insights about implementation choices and codebase patterns (mimics the deprecated Explanatory output style)",