# T6: Mention notifications (@username)

**Status**: resolved
**Priority**: low
**Source**: meta `b82332ce-b4cb-11e7-b510-040140774501`
**Filed**: 2026-02-01

## Problem

Users want to @mention other Remarkbox users in comments and have those users receive notifications. Currently only reply notifications exist (notify when someone replies to your comment).

## Proposed Implementation

1. Parse comment body for `@username` patterns on save
2. Look up mentioned users and create notifications for them
3. Render @mentions as links to the user's profile

## Files

- `remarkbox/lib/mentions.py` — new module: parse @mentions, resolve users, replace with links
- `remarkbox/lib/render.py` — integrate mention resolution into markdown_to_html pipeline
- `remarkbox/models/node.py` — pass dbsession through set_data() for mention resolution
- `remarkbox/lib/notify.py` — add get_mentioned_user_watchers() for mention notifications
- `remarkbox/views/reply_node.py` — pass dbsession to set_data()
- `remarkbox/views/new_thread.py` — pass dbsession to set_data()
- `remarkbox/api/views.py` — pass dbsession to set_data() in API endpoints
- `remarkbox/static/css/common.css` — CSS for .mention class

## Acceptance Criteria

- [x] @username in a comment triggers a notification to that user
- [x] Mentioned usernames are rendered as links
- [x] Non-existent usernames are left as plain text