fix(sdk): sync default agent nullability

Follow-up for #7835 bot review

packages/kilo-vscode/src/KiloProvider.ts

@@ -87,10 +87,6 @@ type KiloProviderOptions = {
   slimEditMetadata?: boolean
 }
 
-type ConfigPatch = Partial<Config> & {
-  default_agent?: string | null
-}
-
 export class KiloProvider implements vscode.WebviewViewProvider, TelemetryPropertiesProvider {
   public static readonly viewType = "kilo-code.SidebarProvider"
 
@@ -1898,7 +1894,7 @@ export class KiloProvider implements vscode.WebviewViewProvider, TelemetryProper
    * Applies a partial config update via the global config endpoint, then pushes
    * the full merged config back to the webview.
    */
-  private async handleUpdateConfig(partial: ConfigPatch): Promise<void> {
+  private async handleUpdateConfig(partial: Partial<Config>): Promise<void> {
     if (!this.client || this.connectionState !== "connected") {
       this.postMessage({ type: "error", message: "Not connected to CLI backend" })
       return
@@ -1914,7 +1910,7 @@ export class KiloProvider implements vscode.WebviewViewProvider, TelemetryProper
     // races with the async config.update() write on the CLI backend).
     this.pending++
     try {
-      await this.client.global.config.update({ config: partial as Config }, { throwOnError: true })
+      await this.client.global.config.update({ config: partial }, { throwOnError: true })
 
       // Re-fetch the full merged config (global + project + all layers) so the
       // webview receives the complete resolved config, not just global-only data.

packages/sdk/js/src/v2/gen/types.gen.ts

@@ -1412,7 +1412,7 @@ export type Config = {
   /**
    * Default agent to use when none is specified. Must be a primary agent. Falls back to 'code' if not set or if the specified agent is invalid.
    */
-  default_agent?: string
+  default_agent?: string | null
   /**
    * Custom username to display in conversations instead of system username
    */

packages/sdk/openapi.json

@@ -13033,7 +13033,14 @@
           },
           "default_agent": {
             "description": "Default agent to use when none is specified. Must be a primary agent. Falls back to 'code' if not set or if the specified agent is invalid.",
-            "type": "string"
+            "anyOf": [
+              {
+                "type": "string"
+              },
+              {
+                "type": "null"
+              }
+            ]
           },
           "username": {
             "description": "Custom username to display in conversations instead of system username",
@@ -14882,4 +14889,4 @@
       }
     }
   }
-}
+}