[FEATURE] Lightweight standalone editor/IDE purpose-built for Claude Code

Preflight Checklist

• [x] I have searched existing requests and this feature hasn't been requested yet
• [x] This is a single feature request (not multiple features)

Problem Statement

Most Claude Code users (myself included) use VS Code purely as a UI shell for Claude Code. We don't use IntelliSense, debugging, extensions, or most editor features — Claude handles all of that. VS Code is a 180MB full-featured IDE when all we need is a file tree, a Claude Code panel, and a diff viewer.

The current workflow means we're dependent on Microsoft's product for what is essentially a file browser with Claude Code bolted on. The VS Code extension, while good, is limited by VS Code's extension API and can never be as deeply integrated as a native experience.

Anthropic already proved with Cowork that the team can ship a purpose-built GUI for Claude's agent capabilities in under two weeks. The developer community is asking for the same thing — every "Cursor vs Claude Code" discussion boils down to "Claude Code has the best agent but Cursor has the better visual experience."

Proposed Solution

A lightweight, standalone editor built by Anthropic specifically for Claude Code. Think Cowork's interface but for developers:

• File tree on the left
• Claude Code panel on the right
• Inline diffs and visual plan review
• Terminal integration
• No extension marketplace, no plugin bloat

This gives Anthropic full control over the experience and eliminates the dependency on VS Code as a host. The same Agent SDK powering Cowork and Claude Code could power this.

Alternative Solutions

Currently using VS Code with the native Claude Code extension (anthropic.claude-code) as a workaround. VS Code works but is massive overkill — I use maybe 5% of its features. Claude Code does all the editing, debugging, and code generation. VS Code is essentially a file browser with a Claude Code sidebar.

Cursor is the other alternative the community uses, but it means paying for a second subscription and using a tool built around multi-model flexibility when I only need Claude. Third-party wrappers like Builder.io's visual interface exist but add another dependency layer.

Priority

Medium - Would be very helpful

Feature Category

Developer tools/SDK

Use Case Example

Example scenario:

1. I run an AI consulting firm with 30 developers using Claude Code daily across 100+ client projects
2. Every developer has VS Code open solely as a host for Claude Code — no one uses IntelliSense, debugging, or extensions
3. We need: file tree, Claude Code panel, inline diffs, terminal — that's it
4. A lightweight Anthropic-built editor would reduce setup friction for new team members, eliminate VS Code dependency, and let Anthropic control the full experience
5. Anthropic already proved this is feasible — Cowork was built in under two weeks using the same Agent SDK

Additional Context

Community signal: Every "Cursor vs Claude Code" comparison (Product Hunt, Reddit, blogs) reaches the same conclusion — Claude Code has the superior agent but lacks a native visual experience. Developers are building third-party wrappers to fill this gap. 4M+ installs on the VS Code extension confirms massive demand.

Precedent: Cowork was built by Boris's team in ~1.5 weeks using Claude Code itself, proving Anthropic can ship purpose-built GUIs fast. The Agent SDK already powers both Cowork and Claude Code — a lightweight editor would be a third surface on the same foundation.

Strategic case: Anthropic currently depends on Microsoft (VS Code) and JetBrains as hosts. Owning the