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Tagging pulls files you’ve already saved to Mesa directly into a conversation. Unlike one-off attachments, tagged files live in your Mesa library, so you can reuse the same documents across as many conversations as you like without re-uploading them.

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Tag a file in a conversation

1

Open the chat box

Go to the Home page or New Conversation page.
2

Open the file picker

Click the @ symbol at the bottom-left of the chat box, or type @ directly and select Select from my files.
3

Choose your file

Select the file you want Mesa to reference.
4

Finish your prompt

Continue typing and send your message. Mesa uses the tagged file in its response.
Working with a document you won’t need again? Use an attachment instead. To organize the files you can tag, see Files.
The @ picker isn’t the only way to reference something. Almost anything in Mesa with its own page (a file, a conversation, a report, a dataset, or a piece of Library content) has a copy link button next to its title. This is the quickest way to pull the exact thing you’re looking at into a new conversation.
1

Copy the link

Open the item you want to reference and click the link icon next to its title.
2

Paste it into a conversation

Go to a chat box and paste. Mesa recognizes the link and turns it into a reference to that item, the same as if you’d tagged it with @.
3

Finish your prompt

Keep typing and send. Mesa uses the referenced item when it responds.
A link always points at the item’s current version, so a reference you paste today stays accurate even after the underlying file or report changes. See Version history.

Files

Manage the saved documents that you can tag in conversations.

Attachments

Upload temporary documents for a single conversation.

Exhaustive search

Tag files to define the corpus for a comprehensive search.
Last modified on July 17, 2026