Generate Archify cards from registry descriptions for model diagrams

An architecture diagram inside a model that defines no cards gets one card
per drawn shared element with a description, as the extension does. Test
covers the resolved JSON; formats.md and SKILL.md describe the rule.

scripts/src/services/model.mjs

@@ -28,6 +28,18 @@ const COPY = {
 };
 // What a diagram may override on a shared element. Everything else in COPY is fixed.
 export const OVERRIDE = ['label', 'sublabel', 'tag'];
+// Archify card dot colour per component type (the colour Archify gives the node).
+const DOT_BY_TYPE = { frontend: 'cyan', backend: 'emerald', database: 'violet', cloud: 'amber', security: 'rose', messagebus: 'orange', external: 'slate' };
+export const dotForType = (type) => DOT_BY_TYPE[type ?? ''] ?? 'slate';
+
+// Archify info cards for shared elements: one per element with a description,
+// titled by its label. An architecture diagram without cards of its own gets
+// these for the elements it draws, as the extension does.
+export function cardsFromElements(elements) {
+  return elements
+    .filter((element) => typeof element.description === 'string' && element.description.trim())
+    .map((element) => ({ dot: dotForType(element.type), title: element.label ?? element.id, items: [element.description.trim()] }));
+}
 // Registry-only fields, never sent to Archify.
 const REGISTRY_ONLY = ['description', 'diagram'];
 const SKIP_DIRS = new Set(['node_modules', '.git']);
@@ -241,6 +253,11 @@ export function resolveDiagram(file, { root, elements } = {}) {
     }
     return merged;
   });
+  if (type === 'architecture' && diagram.cards === undefined && refs.length) {
+    const drawn = [...new Set(refs)].map((ref) => elements?.[ref]).filter(Boolean);
+    const cards = cardsFromElements(drawn);
+    if (cards.length) diagram.cards = cards;
+  }
   result.resolved = diagram;
   return result;
 }