BREAKING CHANGE(vercel-ai-sdk): migrate to Vercel AI SDK v6 and introduce provider registry (getModel) returning LanguageModelV3

ts/smartai.classes.smartai.ts

@@ -0,0 +1,51 @@
+import * as plugins from './plugins.js';
+import type { ISmartAiOptions, LanguageModelV3 } from './smartai.interfaces.js';
+import { createOllamaModel } from './smartai.provider.ollama.js';
+import { createAnthropicCachingMiddleware } from './smartai.middleware.anthropic.js';
+
+/**
+ * Returns a LanguageModelV3 for the given provider and model.
+ * This is the primary API — consumers use the returned model with AI SDK's
+ * generateText(), streamText(), etc.
+ */
+export function getModel(options: ISmartAiOptions): LanguageModelV3 {
+  switch (options.provider) {
+    case 'anthropic': {
+      const p = plugins.createAnthropic({ apiKey: options.apiKey });
+      const base = p(options.model) as LanguageModelV3;
+      if (options.promptCaching === false) return base;
+      return plugins.wrapLanguageModel({
+        model: base,
+        middleware: createAnthropicCachingMiddleware(),
+      }) as unknown as LanguageModelV3;
+    }
+    case 'openai': {
+      const p = plugins.createOpenAI({ apiKey: options.apiKey });
+      return p(options.model) as LanguageModelV3;
+    }
+    case 'google': {
+      const p = plugins.createGoogleGenerativeAI({ apiKey: options.apiKey });
+      return p(options.model) as LanguageModelV3;
+    }
+    case 'groq': {
+      const p = plugins.createGroq({ apiKey: options.apiKey });
+      return p(options.model) as LanguageModelV3;
+    }
+    case 'mistral': {
+      const p = plugins.createMistral({ apiKey: options.apiKey });
+      return p(options.model) as LanguageModelV3;
+    }
+    case 'xai': {
+      const p = plugins.createXai({ apiKey: options.apiKey });
+      return p(options.model) as LanguageModelV3;
+    }
+    case 'perplexity': {
+      const p = plugins.createPerplexity({ apiKey: options.apiKey });
+      return p(options.model) as LanguageModelV3;
+    }
+    case 'ollama':
+      return createOllamaModel(options);
+    default:
+      throw new Error(`Unknown provider: ${(options as ISmartAiOptions).provider}`);
+  }
+}