The Code Editor Is Dead. Three Platforms Buried It in the Same Week.

Cursor 3 launched on April 2. Not an update. A full rebuild. The editor is now secondary to what they're calling an agent orchestration workspace. You can run unlimited parallel agents, locally or in the cloud, launch them from your phone or Slack or Linear, and manage them in a fleet view. There's a Design Mode for annotating UI elements in the browser. There's /worktree for isolated agent execution in git worktrees. There's /best-of-n for running the same prompt against multiple models side by side.

The same day, GitHub shipped custom .agent.md files for Copilot in Visual Studio. You define an agent in markdown, drop it in your repo, and it gets full workspace awareness, tool access, and MCP connections. A new find_symbol tool gives agents language-aware navigation across C++, C#, TypeScript, and anything with an LSP extension. They also shipped the Copilot SDK in public preview across five languages, exposing the same agent runtime that powers their cloud agent.

And Claude Code pushed two releases in a single day. v2.1.90 added /powerup (an in-terminal learning system), auto mode boundary enforcement, and .husky directory protection. v2.1.91 followed hours later with TaskCreated hooks, worktree HTTP hooks, deep links via claude-cli:// protocol, and YAML glob rules for skills.

I've been using Claude Code daily for months. The shift I'm seeing isn't incremental. The file tree is becoming an implementation detail. The agent control plane is becoming the primary interface. Cursor explicitly framed their 3.0 as a response to Claude Code's reported 54% market share, positioning themselves as a fleet manager rather than a file editor. GitHub is making every repo an agent workspace. Claude Code is building the hooks and lifecycle events that let you wire agents into CI/CD pipelines.

If you're still thinking about AI coding tools as "autocomplete with extra steps," you're working with a mental model from 2024. The pattern is clear: design your workflows around agent coordination. Task queues, verification loops, merge strategies. The editor is where agents happen to write code. It's not where you spend your time anymore.