Add sanity-plugin to marketplace

.claude-plugin/marketplace.json

@@ -686,17 +686,18 @@
       "homepage": "https://github.com/semgrep/mcp-marketplace.git"
     },
     {
-      "name": "railway",
+      "name": "sanity-plugin",
-      "description": "Deploy and manage apps, databases, and infrastructure on Railway. Covers project setup, deploys, environment configuration, networking, troubleshooting, and monitoring.",
+      "description": "Sanity content platform integration with MCP server, agent skills, and slash commands. Query and author content, build and optimize GROQ queries, design schemas, and set up Visual Editing.",
-      "category": "deployment",
+      "category": "development",
-      "source": {
+      "author": {
-        "source": "git-subdir",
+        "name": "Sanity"
-        "url": "railwayapp/railway-skills",
-        "path": "plugins/railway",
-        "ref": "main",
-        "sha": "d52f3741a6a33a3191d6138eb3d6c3355cb970d1"
       },
-      "homepage": "https://docs.railway.com/ai/claude-code-plugin"
+      "source": {
+        "source": "url",
+        "url": "https://github.com/sanity-io/agent-toolkit.git",
+        "sha": "4b1fb10bd707a22cf0cdfad5374ffc885f2ffa8d"
+      },
+      "homepage": "https://www.sanity.io"
     }
   ]
 }