fix: address self-review findings

.codex-plugin/plugin.json

@@ -1,7 +1,7 @@
 {
   "name": "diagram-design",
-  "description": "Editorial-quality technical and product diagrams - 27 types rendered as standalone HTML with inline SVG, skinnable to match your brand, plus draw.io import that redraws existing .drawio files at a chosen format, size, and level of detail",
-  "version": "2.1.0",
+  "description": "Editorial-quality technical and product diagrams - 27 types rendered as standalone HTML with inline SVG, skinnable to match your brand, plus draw.io and Mermaid import at a chosen format, size, and level of detail",
+  "version": "2.2.0",
   "author": {
     "name": "Cathryn Lavery",
     "url": "https://github.com/cathrynlavery"
@@ -17,6 +17,7 @@
     "visualization",
     "editorial",
     "drawio",
+    "mermaid",
     "import"
   ],
   "skills": "./skills/",
@@ -34,7 +35,8 @@
     "defaultPrompt": [
       "Make an architecture diagram of my app.",
       "Create a flowchart for this decision process.",
-      "Build a sequence diagram for this workflow."
+      "Build a sequence diagram for this workflow.",
+      "Redraw this Mermaid diagram at the right size and detail level."
     ],
     "brandColor": "#b5523a"
   }