Add files as knowledge
Upload supported documents and images, monitor processing, and verify that extracted content helps the agent.
Open Sources → Content. Select Files to upload material that is not available from a public URL. An agent can have up to 50 files. Each file must be 50 MB or smaller. Supported formats are PDF, DOC, DOCX, TXT, PPTX, XLSX, XLS, PNG, JPG, and JPEG. On the Free plan, only PDF, DOC, DOCX, and TXT files can be uploaded. PPTX, XLSX, XLS, PNG, JPG, and JPEG need a paid plan. On Free, the upload of one of these types is refused before it starts, with 403 PLAN_UPGRADE_REQUIRED over the REST API.
Upload carefully
Choose files that are authoritative and readable on their own. A slide deck with sparse bullets or a scanned image can contain less useful context than a well-structured document. When you upload a batch, the system processes valid files in order. It skips invalid files. It stops the batch at the per-agent file limit. Every source shares your plan's training content limit. A TXT file that does not fit in the remaining limit is refused at upload, and any file is refused once your usage is over the limit. When an upload is refused, the message names the file and the reason.
The file list shows the status of each file: Pending, Processing, Extracting text, Creating embeddings, Completed, or Failed. A Failed file shows the reason in its row, for example when its extracted text exceeds the training content limit. Before you test a file, wait until it reaches Completed. Do not test a file while it still shows Extracting text or Creating embeddings.
Review and maintain
You can preview a completed file. You can download or delete a file in any status. When possible, preview the extracted material. Then ask a known-answer question in Playground. If a new file supersedes an older policy, remove the old file. Otherwise the agent must reconcile contradictory facts.
The system indexes files when you upload them. The retrain worker refreshes website sources and enabled Notion sources. It does not refresh uploaded files. To update a file, upload the revised version. Verify the new result. Then remove the obsolete version. See Manage knowledge sources for the full source-selection workflow.