web-search-cnlisted

# Web Search (China) ## Overview Search the web when the built-in `WebSearch` won't do — its backend is US-only and covers Chinese content poorly. Drive real search engines through the Playwright MCP instead: **Baidu** for China-local content (Chinese query, as-is), **Google** for technical/international content (Chinese query auto-translated to English first). No API keys, no new deps. **Network constraints:** Bing (all domains) is blocked on the user's company network — never use Bing. If Google is unreachable (company network may block it), fall back to **Sogou** (国内可达, no key), then **Baidu** for the technical query as a last resort. Baidu is always reachable. ## When to Use - User asks to search and the content lives on the Chinese internet. - `WebSearch` gives US-centric or empty results for a China-related query. - Need domestic companies, policies, Chinese community content, local weather/events. - Technical search where English web has better coverage (libs, frameworks, papers, APIs). ## Engine Selection | Query intent | Engine | Query language | |---|---|---| | China-local (国内公司/政策/中文社区/天气/本地新闻) | Baidu | Chinese, as-is | | Technical/international (编程/库/框架/论文/国际新闻) | Google | English — translate first | | Unclear or mixed | BOTH, then merge | per-engine | When unsure, run BOTH and merge — the cost is one extra navigate + snapshot. ## Workflow 1. Classify intent (table above). If unclear → search both. 2. Build the URL (URL-encode the query): - Baidu: `http