diff --git a/.github/plugin/marketplace.json b/.github/plugin/marketplace.json
index 529de873..5590d8de 100644
--- a/.github/plugin/marketplace.json
+++ b/.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",
diff --git a/plugins/external.json b/plugins/external.json
index 61c44c48..3fa940c6 100644
--- a/plugins/external.json
+++ b/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.",
diff --git a/skills/excalidraw-diagram-generator/SKILL.md b/skills/excalidraw-diagram-generator/SKILL.md
index e33fd902..1a290eae 100644
--- a/skills/excalidraw-diagram-generator/SKILL.md
+++ b/skills/excalidraw-diagram-generator/SKILL.md
@@ -589,9 +589,16 @@ python scripts/add-arrow.py my-aws-diagram.excalidraw 565 330 650 350 --label "S
 See bundled references for:
 - `references/excalidraw-schema.md` - Complete Excalidraw JSON schema
 - `references/element-types.md` - Detailed element type specifications
-- `templates/flowchart-template.json` - Basic flowchart starter
-- `templates/relationship-template.json` - Relationship diagram starter
-- `templates/mindmap-template.json` - Mind map starter
+- `templates/flowchart-template.excalidraw` - Basic flowchart starter
+- `templates/relationship-template.excalidraw` - Relationship diagram starter
+- `templates/mindmap-template.excalidraw` - Mind map starter
+- `templates/business-flow-swimlane-template.excalidraw` - Business flow swimlane starter
+- `templates/class-diagram-template.excalidraw` - Class diagram starter
+- `templates/data-flow-diagram-template.excalidraw` - Data flow diagram starter
+- `templates/er-diagram-template.excalidraw` - Entity-relationship diagram starter
+- `templates/sequence-diagram-template.excalidraw` - Sequence diagram starter
+- `scripts/add-icon-to-diagram.py` - Add icons from Excalidraw libraries to diagrams
+- `scripts/add-arrow.py` - Add arrows (connections) between elements in diagrams
 - `scripts/split-excalidraw-library.py` - Tool to split `.excalidrawlib` files
 - `scripts/README.md` - Documentation for library tools
 - `scripts/.gitignore` - Prevents local Python artifacts from being committed