feat: add developer growth analysis skill to marketplace for personalized coding insights

.claude-plugin/marketplace.json

@@ -169,6 +169,12 @@
       "description": "Skills for working with Excel spreadsheets including creation, editing, formulas, and data manipulation.",
       "source": "./document-skills/xlsx",
       "category": "productivity-organization"
+    },
+    {
+      "name": "developer-growth-analysis",
+      "description": "Analyzes your recent Claude Code chat history to identify coding patterns, development gaps, and areas for improvement, curates relevant learning resources from HackerNews, and automatically sends a personalized growth report to your Slack DMs.",
+      "source": "./developer-growth-analysis",
+      "category": "development"
     }
   ]
 }