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OpenCode CLI requires Node.js and npm. After installation, run opencode at least once to confirm OpenCode starts correctly.

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1. Check Node.js

node --version
npm --version
If version numbers appear, Node.js and npm are installed. If Node.js is not installed, refer to the Node.js installation guide, then run the checks again.

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2. Install OpenCode CLI

npm install -g opencode-ai@latest
Check the installed version: 
opencode --version

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3. Initialize OpenCode

opencode
If the OpenCode chat UI, model information, or command hints appear, the installation succeeded. OpenCode started successfully