feat: 完成A线详细大纲

- 加入巫族首领摄司的设定（开放祖庭、贡献值制度）
- 修正人族演化路径：底层献祭品→贡献值→祖庭核心→导演终局
- 修正终局之战逻辑：人族制造假情报，坐收渔利
- 修正刑天结局：至死都是巫族，战死沙场
- 修正九黎阙设定：后期配角，主动被寄生50年后自爆
- 核心主题：人族成长=否定血脉论

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

.claude/commands/xigang.md

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+---
+description: xigang
+---
+```mermaid
+flowchart TD
+    start_node_default([Start])
+    check_outline{If/Else:<br/>Conditional Branch}
+    prompt_add_outline[请先创建小说大纲文件，然后再使用此助手。]
+    end_no_outline([End])
+    check_progress{If/Else:<br/>Conditional Branch}
+    analyze_progress[analyze-progress]
+    create_detailed_outline[create-detailed-outline]
+    review_and_refine[review-and-refine]
+    end_node_default([End])
+
+    start_node_default --> check_outline
+    check_outline -->|存在大纲| check_progress
+    check_outline -->|不存在大纲| prompt_add_outline
+    prompt_add_outline --> end_no_outline
+    check_progress -->|存在进度文件| create_detailed_outline
+    check_progress -->|不存在进度文件| analyze_progress
+    analyze_progress --> create_detailed_outline
+    create_detailed_outline --> review_and_refine
+    review_and_refine --> end_node_default
+```
+
+## Workflow Execution Guide
+
+Follow the Mermaid flowchart above to execute the workflow. Each node type has specific execution methods as described below.
+
+### Execution Methods by Node Type
+
+- **Rectangle nodes**: Execute Sub-Agents using the Task tool
+- **Diamond nodes (AskUserQuestion:...)**: Use the AskUserQuestion tool to prompt the user and branch based on their response
+- **Diamond nodes (Branch/Switch:...)**: Automatically branch based on the results of previous processing (see details section)
+- **Rectangle nodes (Prompt nodes)**: Execute the prompts described in the details section below
+
+### Prompt Node Details
+
+#### prompt_add_outline(请先创建小说大纲文件，然后再使用此助手。)
+
+```
+请先创建小说大纲文件，然后再使用此助手。
+
+大纲文件应包含：
+- 故事背景设定
+- 主要人物设定
+- 整体剧情结构
+- 主要情节节点
+
+请创建大纲后重新运行。
+```
+
+### If/Else Node Details
+
+#### check_outline(Binary Branch (True/False))
+
+**Branch conditions:**
+- **存在大纲**: 项目目录中存在大纲文件(outline.md或大纲.md或类似文件)
+- **不存在大纲**: 项目目录中不存在大纲文件
+
+**Execution method**: Evaluate the results of the previous processing and automatically select the appropriate branch based on the conditions above.
+
+#### check_progress(Binary Branch (True/False))
+
+**Branch conditions:**
+- **存在进度文件**: 项目中存在进度文档文件(progress.md或进度.md)
+- **不存在进度文件**: 项目中不存在进度文档文件
+
+**Execution method**: Evaluate the results of the previous processing and automatically select the appropriate branch based on the conditions above.