Why does Claude Project Knowledge automatically switch to RAG? This is not a mistake, but a normal design of Anthropic. The official note makes it clear: when project knowledge approaches the upper limit of the context window, Claude automatically enables RAG, expanding the project capacity up to 10x while maintaining response quality. That is, the larger the project, the less it will stuff everything into context at once. Official help is here: RAG for Projects.
What does this mean?
It means that your project knowledge is so large that you can no longer rely on "full memory". Claude will change to a retrieval method and find relevant content from the project when needed. For large projects, this is more stable; But if your files are messy, the names are messy, and the topics are messy, the search quality will also be messy.
The official recommends how to organize it
- Break down projects by topic, don't cram everything into a big warehouse.
- The file name should be as clear as possible to facilitate retrieval hits.
- Delete outdated materials and keep the content that is really in use at present.
Many people think that the bigger the project, the stronger it is, but in fact, Claude is more "structured". You give it a sorted project, and it tends to work better than a hodgepodge full of files.
