feat(index.json): add new guide

cookbook/ai_coding_tool_guides/index.json

@@ -95,4 +95,17 @@
         "LiteLLM",
         "Quickstart"
     ]
+},
+{
+    "title": "AI Coding Tool Usage Tracking",
+    "description": "This is a guide to tracking usage for AI coding tools monitor the use of Claude Code , Google Antigravity, OpenAI Codex, Roo Code etc. through LiteLLM.",
+    "url": "https://docs.litellm.ai/docs/tutorials/cost_tracking_coding",
+    "date": "2026-01-17",
+    "version": "1.0.0",
+    "tags": [
+        "Claude Code",
+        "Gemini CLI",
+        "OpenAI Codex",
+        "LiteLLM"
+    ]
 }]

ui/litellm-dashboard/src/components/leftnav.tsx

@@ -7,6 +7,7 @@ import {
   BarChartOutlined,
   BgColorsOutlined,
   BlockOutlined,
+  BookOutlined,
   CreditCardOutlined,
   DatabaseOutlined,
   ExperimentOutlined,
@@ -253,6 +254,12 @@ const Sidebar: React.FC<SidebarProps> = ({ setPage, defaultSelectedKey, collapse
               label: "Old Usage",
               icon: <BarChartOutlined />,
             },
+            {
+              key: "learning-resources",
+              page: "learning-resources",
+              label: "Learning Resources",
+              icon: <BookOutlined />,
+            },
           ],
         },
       ],