Cursor 3.7: Canvas Design Mode, Context Usage Reports, and SDK Nested Subagents
Cursor
Cursor 3.7 (June 4–5, 2026) introduces Design Mode in canvases: developers click, draw, or describe UI changes by voice directly over rendered components to guide edits without writing descriptions. Multi-select and voice input work while an agent is mid-run. A new interactive context usage report in canvases shows token distribution across system prompt, tool definitions, rules, skills, and more. The SDK update adds custom tools via `local.customTools`, auto-review routing for tool calls, JSONL and custom store persistence options, and nested subagents that can spawn their own subagents at any depth. Enterprise customers gained multi-team organization management with separate security, governance, and budget controls (GA as of June 3).
Why it matters
Design Mode addresses a core friction point in UI-heavy development by letting users point-and-annotate directly in the canvas rather than writing descriptions. Nested subagents unlock more complex multi-stage workflows natively in Cursor's SDK.
Importance: 3/5
Major feature release for Cursor IDE; canvas Design Mode and SDK subagent nesting represent significant capability additions.