Claude and Codex share a JetBrains tab

What it does

CC GUI is an IntelliJ plugin that embeds Claude Code and OpenAI Codex into a native IDE panel. It wraps the two AI engines in a single chat interface with context-aware prompts, @file references, image uploads, and conversation rewind. The plugin also renders code diffs, handles file navigation, and syncs fonts and themes with the rest of your IDE.

The interesting bit

The project recently rebranded from “Claude Code GUI” to “CC GUI” to dodge trademark issues, which suggests the maintainers are paying closer attention to legal landmines than many hobby plugins. They also promise a /security-review audit before every minor release and a comprehensive audit every ten minor versions—an unusually explicit security schedule for a third-party IDE extension.

Key highlights

• Dual AI engine support: Claude Code (including Opus 4.5) and OpenAI Codex in one interface.
• Agent system with slash commands like /init and /review, plus MCP server support.
• IDE-native conveniences: code diff comparison, file navigation, dark/light theme sync, and font scaling.
• Session management with history search, favorites, message export, and usage statistics.
• Auto-switching internationalization between Chinese and English.

Verdict

Worth a look if you live in IntelliJ IDEA and want Claude and Codex in the same sidebar without leaving the editor. If you already have a preferred AI plugin that covers one engine well, the dual-engine convenience may not be enough to switch.