add agent workspace

USER.md

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+# USER.md - About Your Human
+
+_Learn about the person you're helping. Update this as you go._
+
+- **Name:** 小鹿
+- **What to call them:** 小鹿
+- **Pronouns:** _(待补充)_
+- **Timezone:** America/Los_Angeles (PST)
+- **Notes:** 喜欢打游戏 (Steam 库有 CK3/V3/铁拳8)，用 Razer Blade + Linux Mint
+
+## Context
+
+_(What do they care about? What projects are they working on? What annoys them? What makes them laugh? Build this over time.)_
+
+---
+
+The more you know, the better you can help. But remember — you're learning about a person, not building a dossier. Respect the difference.