chore(release): bump plugin manifests to 0.6.13

.claude-plugin/marketplace.json

@@ -9,7 +9,7 @@
   "plugins": [
     {
       "name": "agent-skills",
-      "version": "0.6.12",
+      "version": "0.6.13",
       "source": {
         "source": "github",
         "repo": "addyosmani/agent-skills"

.claude-plugin/plugin.json

@@ -1,6 +1,6 @@
 {
   "name": "agent-skills",
-  "version": "0.6.12",
+  "version": "0.6.13",
   "description": "Production-grade engineering skills for AI coding agents — covering the full software development lifecycle from spec to ship.",
   "author": {
     "name": "Addy Osmani"