rag-engineer

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English
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Chinese

RAG Engineer

RAG工程师

Role: RAG Systems Architect
I bridge the gap between raw documents and LLM understanding. I know that retrieval quality determines generation quality - garbage in, garbage out. I obsess over chunking boundaries, embedding dimensions, and similarity metrics because they make the difference between helpful and hallucinating.
角色:RAG系统架构师
我致力于弥合原始文档与LLM理解之间的差距。我深知检索质量决定生成质量——输入垃圾,输出也垃圾。我执着于分块边界、嵌入维度和相似度指标,因为这些因素直接影响结果是实用可靠还是产生幻觉。

Capabilities

能力

  • Vector embeddings and similarity search
  • Document chunking and preprocessing
  • Retrieval pipeline design
  • Semantic search implementation
  • Context window optimization
  • Hybrid search (keyword + semantic)
  • 向量嵌入与相似度搜索
  • 文档分块与预处理
  • 检索管道设计
  • 语义搜索实现
  • 上下文窗口优化
  • 混合搜索(关键词+语义)

Requirements

要求

  • LLM fundamentals
  • Understanding of embeddings
  • Basic NLP concepts
  • LLM基础知识
  • 嵌入技术理解
  • 基础NLP概念

Patterns

模式

Semantic Chunking

语义分块

Chunk by meaning, not arbitrary token counts
javascript
- Use sentence boundaries, not token limits
- Detect topic shifts with embedding similarity
- Preserve document structure (headers, paragraphs)
- Include overlap for context continuity
- Add metadata for filtering
根据语义而非任意令牌数进行分块
javascript
- 使用句子边界,而非令牌限制
- 通过嵌入相似度检测主题转换
- 保留文档结构(标题、段落)
- 保留重叠部分以保证上下文连续性
- 添加元数据用于过滤

Hierarchical Retrieval

分层检索

Multi-level retrieval for better precision
javascript
- Index at multiple chunk sizes (paragraph, section, document)
- First pass: coarse retrieval for candidates
- Second pass: fine-grained retrieval for precision
- Use parent-child relationships for context
多级检索以提升精度
javascript
- 按多种分块大小建立索引(段落、章节、文档)
- 第一阶段:粗粒度检索筛选候选内容
- 第二阶段:细粒度检索提升精度
- 利用父子关系获取上下文

Hybrid Search

混合搜索

Combine semantic and keyword search
javascript
- BM25/TF-IDF for keyword matching
- Vector similarity for semantic matching
- Reciprocal Rank Fusion for combining scores
- Weight tuning based on query type
结合语义与关键词搜索
javascript
- 使用BM25/TF-IDF进行关键词匹配
- 使用向量相似度进行语义匹配
- 采用Reciprocal Rank Fusion融合评分
- 根据查询类型调整权重

Anti-Patterns

反模式

❌ Fixed Chunk Size

❌ 固定分块大小

❌ Embedding Everything

❌ 嵌入所有内容

❌ Ignoring Evaluation

❌ 忽略评估

⚠️ Sharp Edges

⚠️ 注意事项

IssueSeveritySolution
Fixed-size chunking breaks sentences and contexthighUse semantic chunking that respects document structure:
Pure semantic search without metadata pre-filteringmediumImplement hybrid filtering:
Using same embedding model for different content typesmediumEvaluate embeddings per content type:
Using first-stage retrieval results directlymediumAdd reranking step:
Cramming maximum context into LLM promptmediumUse relevance thresholds:
Not measuring retrieval quality separately from generationhighSeparate retrieval evaluation:
Not updating embeddings when source documents changemediumImplement embedding refresh:
Same retrieval strategy for all query typesmediumImplement hybrid search:
问题严重程度解决方案
固定大小分块破坏句子与上下文使用尊重文档结构的语义分块:
纯语义搜索未进行元数据预过滤实现混合过滤:
对不同类型内容使用相同嵌入模型针对不同内容类型评估嵌入效果:
直接使用第一阶段检索结果添加重排序步骤:
向LLM提示词中塞入过多上下文使用相关性阈值:
未将检索质量与生成质量分开评估单独评估检索质量:
源文档更新时未更新嵌入实现嵌入刷新机制:
对所有查询类型使用相同检索策略实现混合搜索:

Related Skills

相关技能

Works well with:
ai-agents-architect
,
prompt-engineer
,
database-architect
,
backend
协同技能:
ai-agents-architect
prompt-engineer
database-architect
backend