Require rainbow README section divider

manifest.json

@@ -2,6 +2,11 @@
   "name": "codex-agent-repository-kit",
   "version": "1.0.0",
   "description": "Universal repository baseline for Codex-assisted projects.",
+  "readmeDivider": {
+    "templateName": "section-line",
+    "source": "https://raw.githubusercontent.com/andreasbm/readme/master/assets/lines/rainbow.png",
+    "usage": "Keep {{ template:section-line }} between major sections in generated README files."
+  },
   "workflows": {
     "newRepository": "new-repository.md",
     "existingProject": "existing-project.md",
@@ -76,4 +81,3 @@
     "PROJECT_VERSION"
   ]
 }
-