feat(tools-registry): add You.com search, research, and extraction tools

[EdwardIrby]

Summary

This PR adds the You.com AI SDK plugin to the tools registry, providing real-time web search, deep research with cited sources, and webpage content extraction capabilities.

Tool Details

Package: @youdotcom-oss/ai-sdk-plugin
Tools: youSearch(), youResearch(), and youContents()
NPM: https://www.npmjs.com/package/@youdotcom-oss/ai-sdk-plugin
Docs: https://github.com/youdotcom-oss/dx-toolkit/tree/main/packages/ai-sdk-plugin#readme
API Keys: https://you.com/platform/api-keys

Features

• Real-time web search with advanced filtering (dates, sites, file types)
• Deep research with comprehensive answers and cited sources, configurable effort (lite to exhaustive)
• Webpage content extraction in markdown or HTML format
• Zero server setup - built on You.com's enterprise search API
• Type-safe with full TypeScript and Zod schema validation

Code Example

The tool is ready to use with any AI SDK model provider (Anthropic, OpenAI, Google, etc.):

import { generateText, stepCountIs } from 'ai';
import { anthropic } from '@ai-sdk/anthropic';
import { youSearch, youResearch, youContents } from '@youdotcom-oss/ai-sdk-plugin';

const { text } = await generateText({
  model: anthropic('claude-sonnet-4-5-20250929'),
  prompt: 'Research the latest developments in quantum computing',
  tools: {
    search: youSearch(),
    research: youResearch(),
    extract: youContents(),
  },
  stopWhen: stepCountIs(5),
});

console.log(text);

Checklist

• Published to npm
• Documented with clear usage instructions
• Tested with AI SDK
• Added to tools registry with all required fields
• Provided working code example
• Follows contributing guide