diff --git a/.github/plugin/marketplace.json b/.github/plugin/marketplace.json
index 7de44601e..aeca6c7cc 100644
--- a/.github/plugin/marketplace.json
+++ b/.github/plugin/marketplace.json
@@ -113,6 +113,62 @@
       "description": "A focused set of prompts, instructions, and a chat mode to help triage incidents and respond quickly with DevOps tools and Azure resources.",
       "version": "1.0.0"
     },
+    {
+      "name": "dotnet",
+      "description": "Common everyday C#/.NET coding skills. Expected to be useful to all .NET developers.",
+      "version": "0.1.0",
+      "author": {
+        "name": "Microsoft",
+        "url": "https://www.microsoft.com"
+      },
+      "homepage": "https://github.com/dotnet/skills",
+      "keywords": [
+        "dotnet",
+        "csharp",
+        "coding",
+        "skills",
+        "csharp-script",
+        "single-file",
+        "nuget-publishing",
+        "pinvoke"
+      ],
+      "license": "MIT",
+      "repository": "https://github.com/dotnet/skills",
+      "source": {
+        "source": "github",
+        "repo": "dotnet/skills",
+        "path": "plugins/dotnet"
+      }
+    },
+    {
+      "name": "dotnet-diag",
+      "description": "Skills for .NET performance investigations, debugging, and incident analysis.",
+      "version": "0.1.0",
+      "author": {
+        "name": "Microsoft",
+        "url": "https://www.microsoft.com"
+      },
+      "homepage": "https://github.com/dotnet/skills",
+      "keywords": [
+        "dotnet",
+        "diagnostics",
+        "performance",
+        "debugging",
+        "tracing",
+        "symbolicate",
+        "android-tombstone",
+        "dump-collection",
+        "microbenchmarking",
+        "clr-activation"
+      ],
+      "license": "MIT",
+      "repository": "https://github.com/dotnet/skills",
+      "source": {
+        "source": "github",
+        "repo": "dotnet/skills",
+        "path": "plugins/dotnet-diag"
+      }
+    },
     {
       "name": "doublecheck",
       "source": "doublecheck",
diff --git a/plugins/external.json b/plugins/external.json
index ec8c8073a..f8550010e 100644
--- a/plugins/external.json
+++ b/plugins/external.json
@@ -16,5 +16,41 @@
       "repo": "microsoft/azure-skills",
       "path": ".github/plugins/azure-skills"
     }
+  },
+  {
+    "name": "dotnet",
+    "description": "Common everyday C#/.NET coding skills. Expected to be useful to all .NET developers.",
+    "version": "0.1.0",
+    "author": {
+      "name": "Microsoft",
+      "url": "https://www.microsoft.com"
+    },
+    "homepage": "https://github.com/dotnet/skills",
+    "keywords": ["dotnet", "csharp", "coding", "skills", "csharp-script", "single-file", "nuget-publishing", "pinvoke"],
+    "license": "MIT",
+    "repository": "https://github.com/dotnet/skills",
+    "source": {
+      "source": "github",
+      "repo": "dotnet/skills",
+      "path": "plugins/dotnet"
+    }
+  },
+  {
+    "name": "dotnet-diag",
+    "description": "Skills for .NET performance investigations, debugging, and incident analysis.",
+    "version": "0.1.0",
+    "author": {
+      "name": "Microsoft",
+      "url": "https://www.microsoft.com"
+    },
+    "homepage": "https://github.com/dotnet/skills",
+    "keywords": ["dotnet", "diagnostics", "performance", "debugging", "tracing", "symbolicate", "android-tombstone", "dump-collection", "microbenchmarking", "clr-activation"],
+    "license": "MIT",
+    "repository": "https://github.com/dotnet/skills",
+    "source": {
+      "source": "github",
+      "repo": "dotnet/skills",
+      "path": "plugins/dotnet-diag"
+    }
   }
 ]