support plugins in external agent config migration (#17855)

codex-rs/app-server-protocol/schema/json/ClientRequest.json

@@ -605,6 +605,16 @@
         "description": {
           "type": "string"
         },
+        "details": {
+          "anyOf": [
+            {
+              "$ref": "#/definitions/MigrationDetails"
+            },
+            {
+              "type": "null"
+            }
+          ]
+        },
         "itemType": {
           "$ref": "#/definitions/ExternalAgentConfigMigrationItemType"
         }
@@ -620,6 +630,7 @@
         "AGENTS_MD",
         "CONFIG",
         "SKILLS",
+        "PLUGINS",
         "MCP_SERVER_CONFIG"
       ],
       "type": "string"
@@ -1359,6 +1370,20 @@
         }
       ]
     },
+    "MigrationDetails": {
+      "properties": {
+        "plugins": {
+          "items": {
+            "$ref": "#/definitions/PluginsMigration"
+          },
+          "type": "array"
+        }
+      },
+      "required": [
+        "plugins"
+      ],
+      "type": "object"
+    },
     "ModeKind": {
       "description": "Initial collaboration mode to use when the TUI starts.",
       "enum": [
@@ -1478,6 +1503,24 @@
       ],
       "type": "object"
     },
+    "PluginsMigration": {
+      "properties": {
+        "marketplaceName": {
+          "type": "string"
+        },
+        "pluginNames": {
+          "items": {
+            "type": "string"
+          },
+          "type": "array"
+        }
+      },
+      "required": [
+        "marketplaceName",
+        "pluginNames"
+      ],
+      "type": "object"
+    },
     "ReadOnlyAccess": {
       "oneOf": [
         {