Collaborate on files
Leave comments on files, reply to teammates, and browse or restore previous versions of any file.
You and your team can discuss any file directly in Contextium using comments, and every save is automatically preserved so you can go back to any earlier version whenever you need to.
Leave a comment
To start a discussion on a file, open the file and click Comments in the sidebar. Type your comment in the text box — Markdown formatting is supported for bold, italic, inline code, and links — then click Post or press Cmd/Ctrl + Enter to publish it.
Leave a comment on a specific version
If you want to discuss what changed at a particular point in time, open Version History in the sidebar, select the version you care about, and click Comment on This Version. That comment stays attached to that version so it's easy to find later.
Reply and mention
To reply to an existing comment, click Reply underneath it, write your response, and click Post. Replies appear indented below the original so conversations stay threaded and easy to follow.
You can also edit or delete your own comments at any time using the ... menu on the comment.
To notify a teammate, type @ followed by their name in any comment. They'll receive a notification in their bell icon and can click it to jump directly to the comment.
Notify teammates from Claude
If you're working in Claude with the Contextium MCP connected, you can notify teammates without switching to the web UI.
Examples:
"Notify the team about this new spec I just created""Notify Sarah about this workflow""Notify Tom and Alice about this file"
Claude uses the notify_team_members tool, which sends a notification to each recipient's bell icon. It respects each member's notification preferences and Do Not Disturb settings. You can target everyone in the workspace, or specific members by name, email, or ID. If a name is ambiguous (e.g. two people named Sarah), Claude will ask you to clarify before sending.
How version history works
Every time you save a file, Contextium automatically creates a new version. You don't need to do anything — saving is enough. Each version records the complete content of the file, who made the change, and when.
How far back you can look depends on your plan:
- Free — None
- Pro — 30 days
- Team — 90 days
- Enterprise — Unlimited
View and restore a version
To open the history of a file, click History in the sidebar. You'll see every version listed in order, with the author and timestamp for each.
Click any version to preview the full content as it was at that point, including a line-by-line comparison with the previous version — green lines were added, red lines were removed.
To restore a version:
- Find the version you want in the history panel
- Click Restore This Version
- Confirm the restoration
Restoring creates a new version at the top of the history, so your full change record is always preserved. If you change your mind, you can restore any other version the same way.