> ## Documentation Index > Fetch the complete documentation index at: https://docs.cogniagent.ai/llms.txt > Use this file to discover all available pages before exploring further. # Workspace files and the Concierge > Ask the Concierge about a file in Workspace files, let it save what it writes with your approval, and attach files that land in Cogni uploads. Point the Concierge at a file and ask what's in it; when it writes something worth keeping, it saves it to Workspace files after you say yes. A Concierge chat: the question names @files/Reports/2026/Q3 summary.md, a step reads the file in Workspace files, and the answer gives the new EMEA figure and two follow-ups The Concierge is your workspace's assistant, the one you open from **Concierge** at the top of the app. It works with [Workspace files](/cowork/files/workspace-files) as you do, and every change it makes shows up in a file's history. ## Ask about a file On the Files page, choose **Mention in chat…** on a file, then **Ask the Concierge**. The Concierge opens with the file already named in your message, as `@files/` and its path. Finish the question and send it; nothing is sent until you do. The Mention dialog for Q3 summary.md with the mention @files/Reports/2026/Q3 summary.md, a task under Your tasks, Nora, Sam and Ivy under New task with…, and Ask the Concierge You can also type the mention yourself in any Concierge message: `@files/Reports/2026/Q3 summary.md`. ### What it can read The Concierge lists folders, finds files by name and reads **text** files: Markdown, plain text, CSV, data files and the like, up to 5 MB each. A PDF, an image or an Office file it can find but not read; ask a coworker with **Code and files** to work on those. ## Let it save a file When the Concierge writes something you might keep, such as a summary, a list or a draft, it can save it as a text file in Workspace files, up to 1 MB. It asks first, on a card that says exactly what it will do: An approval card titled Save Reports/2026/Q3 follow-ups.md to Workspace files, explaining that a file already there with that name is kept, with Save it, No and Always do this The card says one of two things: > Save "Reports/2026/Q3 follow-ups.md" to Workspace files > > A file already there with that name is kept, and this one is saved beside it. > Replace "Reports/2026/Q3 follow-ups.md" in Workspace files > > It becomes the file's new version. Earlier versions stay in its history. **Save it** saves the file. **No** saves nothing, and the conversation carries on. **Always do this** saves it and stops asking: > "Always" means we stop asking anyone in this workspace about changes like this. ## Attach a file Drop a file into a Concierge message, or use its paperclip. Images go along with the message as they are. Any other file is uploaded into Workspace files first, into a folder called **Cogni uploads**, and the message names it there, so the Concierge and everyone else can open it later. The Concierge message box with meeting-notes.txt attached, reading In Workspace files › Cogni uploads, and the paperclip's tooltip saying files go to Workspace files › Cogni uploads ## Start a coworker task with a file The same **Mention in chat…** dialog offers **New task with…** for every coworker with **Code and files** on. Pick one and a new task starts with the file in its message. Or pick one of **Your tasks** to put the file into a conversation you already have. See [Attaching and mentioning](/cowork/files/attaching-and-mentioning). ## In the file's history A file the Concierge saves shows **Concierge** in **Modified by** on the Files page. Its Activity line reads **In your Concierge chat**, or names whose chat it was, so you know where it came from. ## Good to know **Ask for a file, not just an answer.** "Save the follow-ups next to the summary" gets you something your team can open tomorrow, not a reply that scrolls away. The Concierge reads text only. For a PDF, a spreadsheet or an image, start a task with a coworker that has **Code and files** on. ## Common questions It can find it, but it reads text files only. Start a task with a coworker that has **Code and files** on, from **Mention in chat… → New task with…**, and it can open the PDF. It asks before every save, on a card naming the file, until someone chooses **Always do this**. That choice stops the asking for everyone in the workspace. Images go along with your message. Other files are uploaded into Workspace files, in **Cogni uploads**, and stay there like any other file. No. A replace becomes the file's new version, and earlier versions stay in its history. See [Editing and file history](/cowork/files/editing-and-history). ## Next steps Point a coworker at a file. The shared folder at a glance. Versions and who changed what. Browse, upload and organise. This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.