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Hello! This is Weekend Coding.

There has been a major change in Cursor AI.

Since the leak of the entire Claude source code,

I feel that all coding agents around the world are evolving significantly.

Since the v3.0 update, my lectures are also scheduled to be rewritten and updated to the level of a complete overhaul, so

Please look forward to it and give us your support!

Below is the summarized content.

Go see Cursor v3.0 changes for yourself >> Link

< 🚀 Summary of Cursor v3.0 Key Updates >

With this Cursor 3.0 announcement, the entire user interface has been changed.

The following is a summary of the content.

🧠 New Cursor Interface (Agent-Centric Structure)

In Cursor 3.0, the entire interface has been redesigned to be agent-centric.

Through the new Agents Window, you can simultaneously run multiple agents across various environments, including local, worktree, cloud, and remote SSH.

Instead of focusing on a single workflow as before, the structure has been changed to allow multiple tasks to be performed and managed in parallel.

Additionally, you can switch back to the traditional IDE screen at any time or use both environments simultaneously.

🎯 Design Mode: A way to specify the UI directly

In Cursor 3.0, the Design Mode feature has been added, allowing you to request tasks from the agent by directly selecting UI elements in the browser.

You can specify precise targets by dragging specific areas or clicking on elements, allowing the agent to clearly understand which parts need to be modified.

This feature plays a crucial role in increasing feedback accuracy and improving the speed of repetitive tasks.

🧩 Support for Agent Tabs within the Editor

In Cursor 3.0, an Agent tab has been added inside the editor, allowing you to view multiple chats simultaneously.

You can compare or manage each agent's tasks by arranging them side-by-side or in a grid format,

An environment is provided where multiple workflows can be tracked simultaneously.

⚙ Editor Feature Changes (Worktree & Execution Method Improvements)

In Cursor 3.0, major features related to the way tasks are executed have been changed.

With the new /worktree command, you can apply changes in an isolated state, and

You can execute and compare results from multiple models in parallel using the /best-of-n command.

The existing worktree and best-of-n selection features have been removed, and the cloud agent within the editor is no longer provided.

🔌 Plugin & MCP Feature Improvements

In Cursor 3.0, MCP-based features have been enhanced.

MCP apps now support structured content, enabling richer forms of tool output.

Additionally, in enterprise environments, importing third-party plugins is now disabled by default and has been changed so that they can only be used if an administrator explicitly enables them.

🏢 Enterprise & Teams Enhancements

In Cursor 3.0, features for enterprises and teams have also been strengthened.

Directory group names have been added to the audit logs, improving them into a human-readable format, and

A setting has been added to restrict team secret management permissions to Admins only.

Additionally, a feature is provided to disable the "Made with Cursor" code contribution badge at the team level.

🧩 Summary

Cursor 0.43 is not just a simple addition of features;

👉This is an update that reconfigures the entire development environment around the agent.