Add external plugin copilot-goal-skill (#1950)

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

plugins/external.json

@@ -76,6 +76,31 @@
       "ref": "chrome-devtools-mcp-v1.0.1"
     }
   },
+  {
+    "name": "copilot-goal-skill",
+    "description": "Goal-driven task orchestration with independent verification. Interviews the user to define a clear goal, then loops between a Builder subagent (does the work) and an Inspector subagent (judges the result with fresh context). The Inspector never trusts the Builder. Output is auditable in git commits from each subagent actions. Use when the user says \"achieve this goal\", \"make this work\", \"implement until done\", or wants verified autonomous task completion with independent quality review.",
+    "version": "1.0.1",
+    "author": {
+      "name": "Gaetan Semet",
+      "url": "https://github.com/gsemet"
+    },
+    "repository": "https://github.com/gsemet/copilot-goal-skill",
+    "license": "MIT",
+    "keywords": [
+      "goal",
+      "autonomous",
+      "inspector",
+      "builder",
+      "loop"
+    ],
+    "source": {
+      "source": "github",
+      "repo": "gsemet/copilot-goal-skill",
+      "path": "plugins/copilot-goal-skill",
+      "ref": "1.0.1",
+      "sha": "b186d0b0d59da1ea051283a7d99185979ede998a"
+    }
+  },
   {
     "name": "dataverse",
     "description": "Build and manage Microsoft Dataverse solutions using natural language. Includes table/column creation, solution lifecycle, data operations, and MCP server configuration.",
@@ -193,7 +218,13 @@
       "url": "https://www.figma.com"
     },
     "homepage": "https://github.com/figma/mcp-server-guide",
-    "keywords": ["figma", "design", "mcp", "ui", "code-connect"],
+    "keywords": [
+      "figma",
+      "design",
+      "mcp",
+      "ui",
+      "code-connect"
+    ],
     "repository": "https://github.com/figma/mcp-server-guide",
     "source": {
       "source": "github",
@@ -265,7 +296,14 @@
       "url": "https://www.microsoft.com"
     },
     "homepage": "https://github.com/microsoft/Build-CLI",
-    "keywords": ["microsoft", "build", "ignite", "events", "sessions", "learn"],
+    "keywords": [
+      "microsoft",
+      "build",
+      "ignite",
+      "events",
+      "sessions",
+      "learn"
+    ],
     "license": "Apache-2.0",
     "repository": "https://github.com/microsoft/Build-CLI",
     "source": {
@@ -282,7 +320,12 @@
       "url": "https://www.microsoft.com"
     },
     "homepage": "https://github.com/dotnet/modernize-dotnet",
-    "keywords": ["modernization", "upgrade", "migration", "dotnet"],
+    "keywords": [
+      "modernization",
+      "upgrade",
+      "migration",
+      "dotnet"
+    ],
     "license": "MIT",
     "repository": "https://github.com/dotnet/modernize-dotnet",
     "source": {