Add external plugin chat-fork-map (#3145)

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

.github/plugin/marketplace.json

@@ -392,6 +392,31 @@
       "description": "Interactive card deck in a GHCP canvas: tab cards, tables, SVG charts, show/hide sections, numbered outlines, rendered markdown documents, video clips, and forms whose submissions come back to the conversation as prompts.",
       "version": "0.1.0"
     },
+    {
+      "name": "chat-fork-map",
+      "description": "Maps branching Copilot conversations so parallel follow-up questions and exploration paths from complex tasks or learning can be navigated without losing context. Its visual layout makes breadth-first exploration easier than managing multiple active threads in a traditional conversation list.",
+      "version": "0.0.5",
+      "author": {
+        "name": "jdneo",
+        "url": "https://github.com/jdneo"
+      },
+      "repository": "https://github.com/jdneo/copilot-chat-map",
+      "license": "MIT",
+      "keywords": [
+        "canvas",
+        "conversation-history",
+        "copilot-cli",
+        "developer-productivity",
+        "session-branching",
+        "visualization"
+      ],
+      "source": {
+        "source": "github",
+        "repo": "jdneo/copilot-chat-map",
+        "ref": "0.0.5",
+        "sha": "c35ecbc860fa9a108faebc95218435a01c88160d"
+      }
+    },
     {
       "name": "chrome-devtools-plugin",
       "description": "Reliable automation, in-depth debugging, and performance analysis in Chrome using Chrome DevTools and Puppeteer.",

plugins/external.json

@@ -292,6 +292,31 @@
       "sha": "0c2716ca4f28df375529c67b4504b41f7bd29a66"
     }
   },
+  {
+    "name": "chat-fork-map",
+    "description": "Maps branching Copilot conversations so parallel follow-up questions and exploration paths from complex tasks or learning can be navigated without losing context. Its visual layout makes breadth-first exploration easier than managing multiple active threads in a traditional conversation list.",
+    "version": "0.0.5",
+    "author": {
+      "name": "jdneo",
+      "url": "https://github.com/jdneo"
+    },
+    "repository": "https://github.com/jdneo/copilot-chat-map",
+    "license": "MIT",
+    "keywords": [
+      "canvas",
+      "conversation-history",
+      "copilot-cli",
+      "developer-productivity",
+      "session-branching",
+      "visualization"
+    ],
+    "source": {
+      "source": "github",
+      "repo": "jdneo/copilot-chat-map",
+      "ref": "0.0.5",
+      "sha": "c35ecbc860fa9a108faebc95218435a01c88160d"
+    }
+  },
   {
     "name": "chrome-devtools-plugin",
     "description": "Reliable automation, in-depth debugging, and performance analysis in Chrome using Chrome DevTools and Puppeteer.",