Subagents and Models that
Improve Coding Agents

import { generateText, stepCountIs } from 'ai';
import { anthropic } from '@ai-sdk/anthropic';
import { MorphClient } from '@morphllm/morphsdk';

const morph = new MorphClient({ apiKey: process.env.MORPH_API_KEY });
const grepTool = morph.vercel.createWarpGrepTool({ repoRoot: '.' });

const result = await generateText({
  model: anthropic('claude-sonnet-4-5-20250929'),
  tools: { grep: grepTool },
  prompt: 'Find where user authentication is handled',
  stopWhen: stepCountIs(5)
});

console.log(result.text);