Structured understanding and precise Q&A for long PDFs (annual reports, contracts, papers, manuals). Build documents into a hierarchical tree index via PageIndex MCP to achieve chapter-level localization and reasoning-based retrieval.
Use Cases
- User says "Help me analyze the Q3 revenue data in this annual report"
- User says "Where is the breach clause in this contract? What exactly does it say?"
- User says "What does the experimental methods section of this 80-page paper say?"
- User says "Help me find the section about installation steps in this manual"
- User needs to repeatedly ask about different content in the same long document
When to Use This Skill (Instead of Other Tools)
判断逻辑：
Document-related requests ├── Where is the file? Find a certain file → use local-search ├── Simple summary/overview → use summarize ├── Edit PDF content → use PDF reading-type Skill ├── Create Word/Excel → use word-processor / excel-analyzer └── Long-document deep Q&A (the following scenarios) → use deep-doc-reader ✅ ├── PDF exceeds 20 pages ├── Need to precisely locate a specific chapter/page number ├── Need to repeatedly query different parts of the same document └── Need to understand the document's hierarchical structure
## 工作流程
### 第一步：上传文档建立索引
用户提供 PDF 文件后，通过 PageIndex MCP 工具上传并建立树索引：
User provides a PDF path or URL ↓ Call PageIndex MCP to upload the document ↓ PageIndex automatically builds a hierarchical tree index (table of contents → chapters → subsections) ↓ Return a document ID; subsequent queries use this ID
**注意**：
- 首次上传需要等待索引构建（大文档约 1-3 分钟）
- 索引构建完成后，后续查询都是即时的
- 免费额度：1000 页
### 第二步：基于树索引进行问答
User asks: "What is the Q3 revenue data?" ↓ PageIndex navigates via tree-structure reasoning: Document root node → Financial data chapter → Q3 quarterly report → Revenue data ↓ Return precise content + page number citation ↓ Organize the answer, attaching the source page number
### 第三步：多轮追问
同一文档支持多轮追问，无需重新上传：
User: "What is Q3 revenue?" → Answer + page number User: "How does it compare with Q2?" → Automatically navigate to the Q2 section User: "How does management explain this change?" → Locate the MD&A chapter
## 输出格式
### 标准回答格式
```markdown
## 回答
[具体回答内容]
### 来源
- 📄 第 87 页 - 第三季度财务摘要
- 📄 第 92-93 页 - 营收明细表
Structure Overview Format (when the user requests to understand the document structure)
## 文档结构
📑 XXX 年度报告（共 156 页）
├── 第一章：公司概况（p.1-15）
├── 第二章：经营情况讨论（p.16-45）
│ ├── 2.1 行业形势（p.16-22）
│ ├── 2.2 经营成果（p.23-38）
│ └── 2.3 现金流分析（p.39-45）
├── 第三章：财务报表（p.46-120）
│ ├── 3.1 资产负债表（p.46-52）
│ ├── 3.2 利润表（p.53-60）
│ └── ...
└── 附录（p.121-156）
Output Specifications
- Answers must include page number citations (so the user can verify)
- For data-type answers, directly quote the original numbers; do not make calculations
- Divide long answers into paragraphs, labeling the source chapter for each paragraph
- If the relevant content cannot be found in the document, clearly inform the user