longbridge-options-advanced Prompt-only analysis skill. Covers advanced options and volatility strategies for experienced traders — calendar/diagonal spreads, dynamic delta hedging, vol arbitrage, and skew trading — grounded in live Longbridge data. Response language : match the user's input language — Simplified Chinese / Traditional Chinese / English. When to use - "我想做日历价差，近月和远月 IV 哪个贵？" / "Calendar spread — near vs far month IV?" - "TSLA 偏斜很陡，怎么交易 skew？" / "TSLA skew is steep, how to trade it?" - "如何做动态 Delta 对冲？" / "How do I dynamically delta-hedge?" - "什么情况下做 Long Vol vs Short Vol？" / "…