2. Fix Unity MCP and Claude Code

Install/Repair Claude Code

You need the Claude Code CLI (claude) available on your system.

Recommended (native installers)

macOS/Linux/WSL:

curl -fsSL https://claude.ai/install.sh | bash
claude doctor

Windows PowerShell:

irm https://claude.ai/install.ps1 | iex
claude doctor

Alternative: npm via NVM (installs under ~/.nvm)

# Install/select a Node version
nvm install v21.7.1
nvm use v21.7.1

# Install Claude Code CLI into this Node's global prefix
npm install -g @anthropic-ai/claude-code

# Verify it's under NVM
which claude
claude --version

Alternative: npm with system/Homebrew Node

# If you don't have Node yet (macOS):
brew install node

# Install Claude Code CLI globally
npm install -g @anthropic-ai/claude-code

# Verify it's on PATH (typical: /opt/homebrew/bin/claude or /usr/local/bin/claude)
which claude
claude --version

Note: On macOS, Unity launched from Finder/Hub may not inherit your shell PATH. If claude isn’t found, either launch Hub from Terminal (so PATH propagates) or use the Unity MCP window’s “Choose Claude Install Location” to set the absolute path.