diff --git a/.changeset/codex-installer-settings.md b/.changeset/codex-installer-settings.md
new file mode 100644
index 0000000..6d28f32
--- /dev/null
+++ b/.changeset/codex-installer-settings.md
@@ -0,0 +1,5 @@
+---
+"grok-bot-cli": patch
+---
+
+Preserve nested Codex MCP overrides when the generated installer replaces an enabled plugin. Refuse replacement when plugin-level enablement is disabled or unknown.
diff --git a/package-lock.json b/package-lock.json
index faa3a90..51e9770 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -14,12 +14,12 @@
         "grok-bot": "dist/bin/gbot.mjs"
       },
       "devDependencies": {
-        "@agent-bundle/runtime": "https://pkg.pr.new/ScriptedAlchemy/agent-bundle/@agent-bundle/runtime@57a9196caf2590ece001799eaeed92613352bc21",
+        "@agent-bundle/runtime": "https://pkg.pr.new/ScriptedAlchemy/agent-bundle/@agent-bundle/runtime@ab5ae66e1d9c2829a092640c586e2b3eacc4be88",
         "@changesets/cli": "3.0.3",
         "@rstest/core": "0.11.12",
         "@types/node": "^24.0.0",
         "@types/react": "^19.2.18",
-        "agent-bundle": "https://pkg.pr.new/ScriptedAlchemy/agent-bundle/agent-bundle@57a9196caf2590ece001799eaeed92613352bc21",
+        "agent-bundle": "https://pkg.pr.new/ScriptedAlchemy/agent-bundle/agent-bundle@ab5ae66e1d9c2829a092640c586e2b3eacc4be88",
         "react": "19.3.0",
         "react-dom": "19.3.0",
         "typescript": "7.0.2",
@@ -30,9 +30,9 @@
       }
     },
     "node_modules/@agent-bundle/runtime": {
-      "version": "0.0.0-preview-57a9196",
-      "resolved": "https://pkg.pr.new/ScriptedAlchemy/agent-bundle/@agent-bundle/runtime@57a9196caf2590ece001799eaeed92613352bc21",
-      "integrity": "sha512-EVjPcJ1hqH5r4BMQpviqF0DOpG+P2VUvO2eqiWt8Cs86cEEE/RbrTt1ZbQcvcQoStUqBlX99VCnCBTcuckfFug==",
+      "version": "0.0.0-preview-ab5ae66",
+      "resolved": "https://pkg.pr.new/ScriptedAlchemy/agent-bundle/@agent-bundle/runtime@ab5ae66e1d9c2829a092640c586e2b3eacc4be88",
+      "integrity": "sha512-BNT0lK1HC1AfatcFZWM9jaXSjHtD3MHWRYZkPv1alh1FjRftPzipQIE+u/YcB02G/604CDwN/UK5XvZaFMsoAw==",
       "dev": true,
       "license": "Apache-2.0",
       "dependencies": {
@@ -40,7 +40,7 @@
         "effect": "4.0.0-rc.112",
         "flare-redact": "1.6.1",
         "react-server-dom-rspack": "0.1.0",
-        "rsc-markdown-stream": "https://pkg.pr.new/ScriptedAlchemy/agent-bundle/rsc-markdown-stream@57a9196caf2590ece001799eaeed92613352bc21"
+        "rsc-markdown-stream": "https://pkg.pr.new/ScriptedAlchemy/agent-bundle/rsc-markdown-stream@ab5ae66e1d9c2829a092640c586e2b3eacc4be88"
       },
       "engines": {
         "node": ">=22.19.0"
@@ -1825,9 +1825,9 @@
       }
     },
     "node_modules/agent-bundle": {
-      "version": "0.0.0-preview-57a9196",
-      "resolved": "https://pkg.pr.new/ScriptedAlchemy/agent-bundle/agent-bundle@57a9196caf2590ece001799eaeed92613352bc21",
-      "integrity": "sha512-pQqVWXS0lO6jBAScZ5nfEix+MnHG73Twp75MUEym+QuRHv9TPsf3y7A+pyfcMAohlu65YMBflRz3EK36ISgGPA==",
+      "version": "0.0.0-preview-ab5ae66",
+      "resolved": "https://pkg.pr.new/ScriptedAlchemy/agent-bundle/agent-bundle@ab5ae66e1d9c2829a092640c586e2b3eacc4be88",
+      "integrity": "sha512-KKcOxQcR8f52AkOrSUPyOgI27uR1ED+XDLcNDql0ZpyMiAtHA8UJ8h3SvxqTOOLr9sA4owHXx81dvxGQGI5gKQ==",
       "dev": true,
       "license": "Apache-2.0",
       "dependencies": {
@@ -1861,7 +1861,7 @@
         "node": ">=22.19.0"
       },
       "peerDependencies": {
-        "@agent-bundle/runtime": "0.0.0-preview-57a9196",
+        "@agent-bundle/runtime": "0.0.0-preview-ab5ae66",
         "@rstest/core": "^0.11.10",
         "react": "^19.2.0"
       },
@@ -2693,9 +2693,9 @@
       }
     },
     "node_modules/rsc-markdown-stream": {
-      "version": "0.0.0-preview-57a9196",
-      "resolved": "https://pkg.pr.new/ScriptedAlchemy/agent-bundle/rsc-markdown-stream@57a9196caf2590ece001799eaeed92613352bc21",
-      "integrity": "sha512-u8HjqN3YTJl+llLhp/flEXoJ+HITVkXpszyPqRnNSu9mfKFjTF93Oc3F2Sdzw+d4J33xfh5zwNsMBepioA5L1A==",
+      "version": "0.0.0-preview-ab5ae66",
+      "resolved": "https://pkg.pr.new/ScriptedAlchemy/agent-bundle/rsc-markdown-stream@ab5ae66e1d9c2829a092640c586e2b3eacc4be88",
+      "integrity": "sha512-82OHHV7u2ULF6Wh53b7LDUqXRbT0Iu8FyPUJjpPYMKZ0MQQJvvXA8dXV7E6uH1WgQRGPkqH4bdELc1q7EfHFrA==",
       "dev": true,
       "license": "Apache-2.0",
       "engines": {
diff --git a/package.json b/package.json
index 38686d1..bef1755 100644
--- a/package.json
+++ b/package.json
@@ -54,12 +54,12 @@
     "LICENSE"
   ],
   "devDependencies": {
-    "@agent-bundle/runtime": "https://pkg.pr.new/ScriptedAlchemy/agent-bundle/@agent-bundle/runtime@57a9196caf2590ece001799eaeed92613352bc21",
+    "@agent-bundle/runtime": "https://pkg.pr.new/ScriptedAlchemy/agent-bundle/@agent-bundle/runtime@ab5ae66e1d9c2829a092640c586e2b3eacc4be88",
     "@changesets/cli": "3.0.3",
     "@rstest/core": "0.11.12",
     "@types/node": "^24.0.0",
     "@types/react": "^19.2.18",
-    "agent-bundle": "https://pkg.pr.new/ScriptedAlchemy/agent-bundle/agent-bundle@57a9196caf2590ece001799eaeed92613352bc21",
+    "agent-bundle": "https://pkg.pr.new/ScriptedAlchemy/agent-bundle/agent-bundle@ab5ae66e1d9c2829a092640c586e2b3eacc4be88",
     "react": "19.3.0",
     "react-dom": "19.3.0",
     "typescript": "7.0.2",