Unity Claude Code CLI

A dockable Unity Editor window that integrates Claude Code CLI directly into the Unity Editor. Send prompts, watch Claude work with real-time streaming, and let it create and edit files in your project — all without leaving Unity.

Features

• Dockable editor window — Window > Claude Code (Ctrl+Shift+K)
• Real-time streaming — see Claude's response as it types
• Markdown rendering — headers, code blocks with copy button, lists, tables, blockquotes, inline formatting
• Tool use visibility — collapsible foldout showing which tools Claude used and on what files
• Thinking display — optional foldout to see Claude's reasoning
• Action buttons — auto-detected from Claude's response (numbered choices, yes/no questions)
• Conversation continuity — resume previous sessions with the Continue toggle
• Domain reload safe — conversation history survives Unity recompilation; auto-refresh is locked during active requests to prevent mid-task interruption
• Catppuccin Mocha theme — dark, easy-on-the-eyes color scheme

Prerequisites

• Unity 6 (6000.0+)
• Claude Code CLI installed and authenticated — installation guide

Verify the CLI is working:

claude --version

Installation

Option 1: Git URL (recommended)

1. In Unity, go to Window > Package Manager
2. Click + > Add package from git URL...
3. Paste:

   https://github.com/Exano/UnityClaudeCLI.git
   

Option 2: Local development

Clone into your project's Packages/ folder:

cd YourProject/Packages
git clone https://github.com/Exano/UnityClaudeCLI.git com.tonythedev.unity-claude-code-cli

Usage

1. Open Window > Claude Code (or press Ctrl+Shift+K)
2. Type a prompt and press Enter (Shift+Enter for newlines)
3. Claude streams its response with real-time markdown rendering
4. Tool usage (file reads, edits, creates) appears in a collapsible "Used N tools" foldout
5. When Claude asks a question, click the auto-generated action buttons or type a follow-up

Options

Toggle	Description
Continue	Resume the previous conversation instead of starting fresh
Auto-approve	Pass --dangerously-skip-permissions so Claude can freely read/write files

Tips

• Add a CLAUDE.md file to your project root with instructions about your project structure, coding conventions, and Unity version. Claude reads this automatically.
• Use Continue after domain reloads to pick up where Claude left off.
• The Clear button resets conversation history and session ID.

Architecture

File	Purpose
ClaudeProcess.cs	Spawns claude -p, parses stream-json NDJSON, thread-safe output queue
ClaudeCodeEditorWindow.cs	UI Toolkit editor window, polling loop, history persistence
MarkdownRenderer.cs	Markdown block parser and UI Toolkit element renderer
MessageGroup.cs	Visual container for one assistant turn (thinking + tools + content + actions)
ClaudeCodeStyles.uss	Catppuccin Mocha USS stylesheet

License

See LICENSE for details.