Cursor Router, Plugins & Side Chats
What Shipped After Cursor Agent updates
Cursor keeps shipping between numbered releases. Three verified additions since July 2026: an intelligent request router behind Auto, parallel "side chat" conversations with full transcript search, and a new wave of first-party plugins.
Cursor Router: A Smarter Auto
Cursor Router is the model-routing system behind Auto. Not every request needs frontier-level intelligence, so the router runs a classifier on each agent request and sends it to the model that fits the task - fast, efficient models for simple work, the most capable models for the hard stuff. Open the model picker, select Auto, and choose an Optimize For mode:
| Mode | What It Does | Billing |
|---|---|---|
| Cost | The original Auto routing logic - optimizes token spend | Bundled Auto pricing |
| Balance | Optimizes for intelligence, speed, and cost together | Routed model's rate (~2x Cost) |
| Intelligence | Routes to the most capable models for harder tasks | Routed model's rate (~2-4x Cost) |
Admins configure Router from the team dashboard: turn it on or off (per organization group on Enterprise), restrict which modes members can pick, choose whether the routed model's name is shown, and optionally lock everyone to Auto. The TypeScript and Python SDKs expose it as model id auto-smart with an optimize_for parameter.
Side Chats & Conversation Search
Type /side, /btw, or click the + button at the top of the chat panel to open a side chat - a full, durable agent conversation that runs alongside your main thread without interrupting it. Side chats inherit context from the main chat, default to reading/searching/answering (not editing), and can be @-mentioned to pull findings back into the main conversation.
Inside the Agents Window, the command palette (Ctrl+K, distinct from the editor's Inline Edit shortcut) now searches agent transcripts across thousands of past conversations; Ctrl+F searches within the conversation you're currently viewing.
New Plugins: Google Workspace
The Cursor Marketplace added first-party plugins connecting agents directly to Google Drive (search, open, download, and organize files), Gmail (search/read mail, draft and send messages, manage labels and threads), and Google Calendar (read schedules, create/update events, find free time) - install them from the Marketplace or the Customize page.