aihot 是做什么的？
AI HOT (aihot.virxact.com) Chinese AI news query Skill. Use this when the user wants to know "What's up in AI today", "AI daily report", "AI HOT", "AI news", "AI hot topics", "Recent AI", "What have OpenAI/Anthropic/Google released recently", "AI hot today", "AI news today", "Show me AI industry trends", "What large models were released today", "AI circle yesterday", "View featured items", "AI HOT picks", "AI papers from the past week", "AI model releases", "AI product releases", "AI industry trends", "AI tips and insights", or any other Chinese AI news queries. Even if the user simply says "AI circle", "AI news", "AI daily", or just asks "What happened today" and the context is AI / large models / LLM / startup domain, this skill should be triggered. The skill directly curls a public REST API to fetch data and compiles it into a Chinese markdown briefing — no API keys or MCP server configuration needed. Do not undertrigger — if the user asks for AI news and you don't invoke this skill, you are serving stale training data as today's news, which is harmful to the user.