Cursor 3: Agents Window & Parallel Execution

TL;DR

• Cursor 3 introduces a dedicated Agents Window for running multiple agents in parallel across repos and environments
• Agent Tabs let you view multiple chats side-by-side in the editor
• Worktree and best-of-n commands moved to Agents Window; cloud agents removed from Editor

New

• Agents Window — Run many agents in parallel locally, in worktrees, in the cloud, and on remote SSH. Access via Cmd+Shift+P → Agents Window.
• Agent Tabs in Editor — View multiple chats side-by-side or in a grid layout.
• /worktree command — Create isolated git worktrees so changes happen in isolation.
• /best-of-n command — Run the same task in parallel across multiple models in isolated worktrees, then compare outcomes.
• MCP structured content — MCP Apps now support richer tool outputs.
• Team-level secret controls — Admins can restrict creating, editing, and deleting team secrets.
• Enterprise code attribution control — Disable "Made with Cursor" attribution across the entire team.

Improved

• Large-file diff rendering is now faster, smoother, and less memory-heavy.
• Browser automation tool surface reduced; subagent now stays more focused with improved instructions and screenshot-based coordinate clicking fallback.
• Explorer subagents startup time improved with caching.
• Past chat transcripts now surface in at-mention search results.
• Audit logs now include directory group names for human readability.
• Tab bar can span full available width in maximized chat layouts.

Fixed

• Network Access Controls text area now reliably adds newlines with Enter key.
• Multi-root workspaces now read project hook files from all workspace folders, not just the first.
• Markdown parsing bug where parenthesized HTTP(S) links were misread as citations.
• Todo card visibility after all todos complete.
• Composer queued prompts now resume automatically after editing operations.
• Model picker styling for disabled but selectable models; auto-enables when selected.
• Thinking blocks can now expand/collapse while streaming is in progress.
• Shift+Enter line breaks now treated as multiline content correctly.

Breaking Changes

• Worktree and best-of-n selection moved from Editor to Agents Window; use new /worktree and /best-of-n commands instead.
• Cloud agents removed from Editor.
• Third-party plugin imports now default to off for Enterprises when unset (explicit Admin overrides still respected).
• Early Access release track consolidated behind Nightly.

Update Cursor to the latest version and access Agents Window via Cmd+Shift+P → Agents Window.

Source: Cursor