feat(coding-agent): expose dynamic provider refresh

packages/coding-agent/src/core/extensions/types.ts

@@ -25,6 +25,7 @@ import type {
 	OAuthCredentials,
 	OAuthLoginCallbacks,
 	ProviderHeaders,
+	RefreshModelsContext,
 	SimpleStreamOptions,
 	TextContent,
 	ToolResultMessage,
@@ -1420,6 +1421,11 @@ export interface ProviderConfig {
 	authHeader?: boolean;
 	/** Models to register. If provided, replaces all existing models for this provider. */
 	models?: ProviderModelConfig[];
+	/**
+	 * Refresh this provider's model list. The returned list replaces extension-provided models.
+	 * Use context.store explicitly when the catalog should persist across sessions.
+	 */
+	refreshModels?(context: RefreshModelsContext): Promise<ProviderModelConfig[]>;
 	/** OAuth provider for /login support. The `id` is set automatically from the provider name. */
 	oauth?: {
 		/** Display name for the provider in login UI. */