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

test/test.vision.ts

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+import { tap, expect } from '@git.zone/tstest/tapbundle';
+import * as qenv from '@push.rocks/qenv';
+import * as fs from 'fs';
+import * as path from 'path';
+import { getModel } from '../ts/index.js';
+import { analyzeImage } from '../ts_vision/index.js';
+
+const testQenv = new qenv.Qenv('./', './.nogit/');
+
+tap.test('analyzeImage should describe a test image', async () => {
+  const apiKey = await testQenv.getEnvVarOnDemand('ANTHROPIC_TOKEN');
+  if (!apiKey) {
+    console.log('ANTHROPIC_TOKEN not set, skipping test');
+    return;
+  }
+
+  // Find an image file recursively in testimages/
+  const testImageDir = path.join(process.cwd(), 'test', 'testimages');
+  if (!fs.existsSync(testImageDir)) {
+    console.log('No test images directory found, skipping test');
+    return;
+  }
+
+  const findImage = (dir: string): string | null => {
+    for (const entry of fs.readdirSync(dir, { withFileTypes: true })) {
+      const fullPath = path.join(dir, entry.name);
+      if (entry.isDirectory()) {
+        const found = findImage(fullPath);
+        if (found) return found;
+      } else if (/\.(jpg|jpeg|png)$/i.test(entry.name)) {
+        return fullPath;
+      }
+    }
+    return null;
+  };
+
+  const imagePath = findImage(testImageDir);
+  if (!imagePath) {
+    console.log('No test images found, skipping test');
+    return;
+  }
+
+  const imageBuffer = fs.readFileSync(imagePath);
+  const ext = path.extname(imagePath).toLowerCase();
+  const mediaType = ext === '.png' ? 'image/png' : 'image/jpeg';
+
+  const model = getModel({
+    provider: 'anthropic',
+    model: 'claude-sonnet-4-5-20250929',
+    apiKey,
+    promptCaching: false,
+  });
+
+  const result = await analyzeImage({
+    model,
+    image: imageBuffer,
+    prompt: 'Describe this image briefly.',
+    mediaType: mediaType as 'image/jpeg' | 'image/png',
+  });
+
+  console.log('Vision result:', result);
+  expect(result).toBeTruthy();
+  expect(result.length).toBeGreaterThan(10);
+});
+
+export default tap.start();