Managing documents
A brain's page lists all its documents with status and summary. This page shows how to view, correct, replace and delete documents, and how to check what the chat finds in the brain.
Last checked on 28 September 2026
On this page
The document list
For each document the list shows the columns Document, Summary, Status, Size and Added. Custodos writes the summary automatically during processing.
The newest 500 documents are shown. Search documents… filters only these shown documents by title, file name and summary. To search the content, use Test the Brain.
| Status | Meaning |
|---|---|
| Processing | Custodos is reading the text, summarising it and making it searchable. The document is not used for answers yet. |
| Ready | The document is used for answers. |
| Error | Processing failed. The reason is shown on the document, see below. |
| Replaced | A newer version applies. The document stays readable but is no longer used for answers. |
The preview
Open preview shows the source, the summary and the Extracted text of a document, which is exactly the text the chat searches. For documents from a web page or a cloud account, Open source takes you to the original.
When you click a source reference in chat, the preview opens right at the cited passage.
Actions on a document
The actions sit in the Actions menu at the end of each row. You only see it if you may edit the brain.
| Action | When available | What happens |
|---|---|---|
| Edit text | uploaded files and pasted text | You correct the stored text. The document is reprocessed and its title, summary and search update. A kept original is dropped in the process. |
| Mark as replaced | ready documents, when the brain holds others | You choose the document that is the newer version. Use for answers again reverses it. |
| Refresh from source | ready web pages and files from Google Drive or Microsoft 365 | Custodos checks the source for a new version straight away. |
| Download original | Word, Excel and PowerPoint files with a kept original | You get the original file. The download is recorded in the activity log. |
| Edit in chat | as for the original | The file opens as an attachment in a new chat. |
| Process again | documents with Error | Custodos restarts processing. |
| Delete | always | The document and its content are removed for good. |
Editing Word, Excel and PowerPoint in chat
Custodos keeps the originals of uploaded Word, Excel and PowerPoint files up to 4 MB. PDFs, pasted text and files from cloud accounts have no original in the brain. Documents from cloud accounts are edited at their source.
- 1
Open a chat
Choose Edit in chat on the document. Custodos opens a new chat with the file attached. - 2
Describe the change
Describe what should change. The model creates an edited version as a file. Details under Editing your own files. - 3
Back into the brain
Click Save to brain on the generated file. The new version carries the original's file name and replaces the old one once it is processed.
Overview and instructions
Next to the list is the Overview, an automatically generated summary of the whole brain. It appears once the first documents are processed and is rebuilt after changes. Editors can renew it at once through More actions with Rebuild overview.
Below it, editors maintain the Instructions. They apply whenever the brain is active in a chat.
Testing the brain
Test the Brain shows which passages the chat would find for a question. Enter a question and click Search. Custodos lists the most relevant passages as matches. Ask in chat takes you on to the chat.
If the test finds nothing suitable, add documents or rephrase. The search box appears once at least one document is ready.
Processing errors
For temporary faults, Custodos retries processing several times before a document shows Error. If credits or a suitable model are missing, the error shows at once. The most common reasons:
| Message | What to do |
|---|---|
| The credit balance is used up. | Tell an admin. Once credits are available again, choose Process again. |
| Your personal monthly budget is used up. | An admin can raise your budget. |
| The AI provider did not respond. | Choose Process again later. |
| No allowed model can read images. | An admin switches on a model that can read images under Models. Then process again. |
| No text could be extracted from this file. | Check the file, export it again and upload it anew. |
| Processing failed. | Choose Process again. |
Deleting documents
You delete a single document with Delete in its row. To delete several, tick their boxes and delete them together. Deleted documents cannot be restored. Source references in earlier replies remain but no longer lead to the document.
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