# IDE

- [Cursor 3: Agent-First Branding, IDE-Last Architecture](https://sdd.sh/2026/04/cursor-3-agent-first-branding-ide-last-architecture.md): Cursor 3 shipped a genuinely redesigned interface built around parallel agents. The Agents Window, Design Mode, /worktree, and /best-of-n are real features with real uses. But 'agent-first' describes the UI layer, not the architecture — and the distinction matters more than Cursor's marketing suggests.
- [GitHub Copilot Finally Got Autopilot Mode. It's Still Not an Agent.](https://sdd.sh/2026/04/github-copilot-finally-got-autopilot-mode.-its-still-not-an-agent..md): GitHub Copilot's April 8 VS Code update ships Autopilot Mode, nested subagents, and MCP sandboxing. These are real improvements. They're also a demonstration of why bolting autonomy onto an IDE produces something fundamentally different from a real agent.
- [Windsurf After Cognition: GPT-5.4, One Million Users, and an Identity Crisis](https://sdd.sh/2026/04/windsurf-after-cognition-gpt-5.4-one-million-users-and-an-identity-crisis.md): Windsurf has crossed one million active users, added GPT-5.4 with five reasoning effort levels, and is now fully under Cognition AI's ownership. The product is better. The question is whether it has found an identity that justifies its place in the market.