Structured outputs in the SDK

import { query } from '@anthropic-ai/claude-agent-sdk'

// Define structure for TODO extraction
const todoSchema = {
  type: 'object',
  properties: {
    todos: {
      type: 'array',
      items: {
        type: 'object',
        properties: {
          text: { type: 'string' },
          file: { type: 'string' },
          line: { type: 'number' },
          author: { type: 'string' },
          date: { type: 'string' }
        },
        required: ['text', 'file', 'line']
      }
    },
    total_count: { type: 'number' }
  },
  required: ['todos', 'total_count']
}

// Agent uses Grep to find TODOs, Bash to get git blame info
for await (const message of query({
  prompt: 'Find all TODO comments in src/ and identify who added them',
  options: {
    outputFormat: {
      type: 'json_schema',
      schema: todoSchema
    }
  }
})) {
  if (message.type === 'result' && message.structured_output) {
    const data = message.structured_output
    console.log(`Found ${data.total_count} TODOs`)
    data.todos.forEach(todo => {
      console.log(`${todo.file}:${todo.line} - ${todo.text}`)
      if (todo.author) {
        console.log(`  Added by ${todo.author} on ${todo.date}`)
      }
    })
  }
}