Add helius to marketplace

.claude-plugin/marketplace.json

@@ -1040,14 +1040,16 @@
       "homepage": "https://github.com/intercom/claude-plugin-external"
     },
     {
-      "name": "postiz",
-      "description": "Social media automation CLI for scheduling posts, managing integrations, uploading media, and tracking analytics across 28+ platforms including X, LinkedIn, Reddit, YouTube, TikTok, Instagram, and more",
+      "name": "helius",
+      "description": "Build on Solana with Helius — live blockchain tools, expert coding patterns, and autonomous account signup",
       "source": {
-        "source": "url",
-        "url": "https://github.com/gitroomhq/postiz-agent.git",
-        "sha": "c5d1bf5f7e95a71e230fc19ae2150ddd9c549854"
+        "source": "git-subdir",
+        "url": "helius-labs/core-ai",
+        "path": "helius-plugin",
+        "ref": "main",
+        "sha": "05ea4d1128d46618266bbcc23a5e7019c57be0d6"
       },
-      "homepage": "https://postiz.com/agent"
+      "homepage": "https://www.helius.dev/docs"
     }
   ]
 }