Add external plugin keep-the-why (#2776)

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

.github/plugin/marketplace.json

@@ -858,6 +858,31 @@
       "description": "Drive the GitHub Copilot App Modernization for Java workflow from an interactive canvas: environment readiness, repo assessment, prioritized plan and progress, validation gates, and one-click predefined-task runs grounded in the repo's real artifacts.",
       "version": "1.0.2"
     },
+    {
+      "name": "keep-the-why",
+      "description": "Preserves or recovers the reasoning behind a codebase — architectural decisions, rejected alternatives, workarounds, incident learnings, operational constraints, and historical context the code itself cannot explain.",
+      "version": "0.5.2",
+      "author": {
+        "name": "Oliver Zehentleitner",
+        "url": "https://github.com/oliver-zehentleitner"
+      },
+      "repository": "https://github.com/oliver-zehentleitner/keep-the-why",
+      "homepage": "https://keepthewhy.com",
+      "license": "MIT",
+      "keywords": [
+        "documentation",
+        "context",
+        "decision-log",
+        "knowledge-management",
+        "onboarding",
+        "agents"
+      ],
+      "source": {
+        "source": "github",
+        "repo": "oliver-zehentleitner/keep-the-why",
+        "ref": "v0.5.2"
+      }
+    },
     {
       "name": "kotlin-mcp-development",
       "source": "plugins/kotlin-mcp-development",

plugins/external.json

@@ -584,6 +584,31 @@
       "sha": "8b644bebc7e1f929c01d80788293a37872f480f8"
     }
   },
+  {
+    "name": "keep-the-why",
+    "description": "Preserves or recovers the reasoning behind a codebase — architectural decisions, rejected alternatives, workarounds, incident learnings, operational constraints, and historical context the code itself cannot explain.",
+    "version": "0.5.2",
+    "author": {
+      "name": "Oliver Zehentleitner",
+      "url": "https://github.com/oliver-zehentleitner"
+    },
+    "repository": "https://github.com/oliver-zehentleitner/keep-the-why",
+    "homepage": "https://keepthewhy.com",
+    "license": "MIT",
+    "keywords": [
+      "documentation",
+      "context",
+      "decision-log",
+      "knowledge-management",
+      "onboarding",
+      "agents"
+    ],
+    "source": {
+      "source": "github",
+      "repo": "oliver-zehentleitner/keep-the-why",
+      "ref": "v0.5.2"
+    }
+  },
   {
     "name": "microsoft-docs",
     "description": "Access official Microsoft documentation, API references, and code samples for Azure, .NET, Windows, and more.",