AI workflows · Keep each user's sources in scope
LLM Chatbot Files VPN: design document access for every conversation
A chatbot that answers questions about files needs a clear answer to a prior question: which files may this person read? LLM Chatbot Files VPN explores that application boundary. Start with user identity and source permissions, then design retrieval, answers, and any follow-up actions around the same approved scope.
Build a permission matrix before the chat box
Create harmless sample collections for two teams and one shared project. Define who may read each collection, upload new material, and change sharing. Use those rules to design your retrieval process before adding a conversational interface that makes all documents appear equally available.
Include account changes in the design. Decide what happens when a colleague moves teams, a document becomes restricted, or a shared project closes. Existing conversations and saved answers deserve attention alongside future retrieval requests.
Separate answers from actions
A chatbot may summarize a file without needing permission to send it, delete it, or change access. List those capabilities individually. Give consequential actions a clear review point showing the destination, file version, and requested change before anything happens.
OWASP discusses prompt injection through untrusted input in LLM applications. Use that risk as a reason to test the surrounding controls with source documents that contain misleading instructions. A paragraph in a retrieved file should not become authorization to act on unrelated material.
Make a wrong answer diagnosable
Ask the interface to identify the source version and relevant passage when possible. Design distinct messages for no supporting source, insufficient permission, and a temporary service problem. These situations call for different next steps and should not all become an empty or confident answer.
Run a short test set after permission or retrieval changes. Include a shared document, a restricted document, an obsolete version, and a question with no answer in the collection. Keep the test documents fictional so failures can be discussed openly while you improve the workflow.
Questions about LLM Chatbot Files VPN
Can the system prompt enforce every document permission?
Design access control in the application and retrieval layer. Instructions can describe behavior, but they should not be the only permission mechanism.
What should a source reference tell the user?
Identify the document, its relevant version, and the passage supporting the answer, within the permissions of the person reading it.