chore: throw exception in the case where a model can't be determined

Author: abarker-launchdarkly

packages/sdk/server-ai/src/LDAIConfigMapper.ts

@@ -37,6 +37,11 @@ export class LDAIConfigMapper {
     } else {
       model = provider[this._provider?.name ?? '']?.(this._model?.name ?? '');
     }
+    if (!model) {
+      throw new Error(
+        'Vercel AI SDK model cannot be determined from the supplied provider parameter.',
+      );
+    }
 
     let messages: LDMessage[] | undefined;
     if (this._messages || options?.nonInterpolatedMessages) {

packages/sdk/server-ai/src/api/config/LDAIConfig.ts

@@ -74,9 +74,12 @@ export interface LDAIConfig {
    * Maps this AI config to a format usable direcly in Vercel AI SDK generateText()
    * and streamText() methods.
    *
+   * WARNING: this method can throw an exception if a Vercel AI SDK model cannot be determined.
+   *
    * @param provider A Vercel AI SDK Provider or a map of provider names to Vercel AI SDK Providers.
    * @param options Optional mapping options.
    * @returns A configuration directly usable in Vercel AI SDK generateText() and streamText()
+   * @throws {Error} if a Vercel AI SDK model cannot be determined from the given provider parameter.
    */
   toVercelAISDK: <TMod>(
     provider: VercelAISDKProvider<TMod> | Record<string, VercelAISDKProvider<TMod>>,