Initial commit: Text Adventure Game

Features:
- Combat system with AP/EP hit calculation and three-layer defense
- Auto-combat/farming mode
- Item system with stacking support
- Skill system with levels, milestones, and parent skill sync
- Shop system with dynamic pricing
- Inventory management with bulk selling
- Event system
- Game loop with offline earnings
- Save/Load system

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.claude/agents/loop-back.md

@@ -0,0 +1,6 @@
+---
+name: loop-back
+description: 返回开发阶段
+model: sonnet
+---
+返回开发阶段以继续修复当前步骤。循环返回直到验证通过。