What is the problem?
面向新手整理 LangChain 做 RAG 的入门流程，覆盖文档加载、切分、embedding、向量库、retriever、回答链、评测和上线边界。
Quick solution
Treat this as a AI tools tutorial issue. First confirm the environment, inputs, permissions, logs, and delivery boundary. Then use the linked deep guide for the full checklist before changing production code or promising a result.
Read the deep guideDetailed steps
- Confirm the scenario, tool version, account permissions, inputs, and expected output before changing anything.
- Check configuration, logs, command output, and human review boundaries against the linked deep guide.
- Record the before and after result, then verify that the fix did not introduce platform, privacy, or delivery risk.
Commands or code
The source article does not include a copyable command block. Do not invent commands here; follow the diagnostic steps in the deep guide and validate changes in the real project environment.
Risk notes
Confirm the real project environment, account permissions, platform rules, and output quality before delivery. Do not ship AI-generated changes without human review, and do not claim indexing, income, deployment success, or ranking improvements without measured evidence.