OpenCode Setup

OpenCode is an open-source coding agent that works with many LLM providers. It communicates via ACP through the opencode acp command.

Install and Configure

Open a terminal (Terminal on macOS/Linux, PowerShell on Windows) and run the following commands.

1. Install OpenCode:

macOS/Linux

curl -fsSL https://opencode.ai/install | bash

Windows

npm install -g opencode-ai

Other installers (Homebrew, Scoop, Chocolatey) are listed in the OpenCode docs.

2. Find the installation path:

macOS/Linux

which opencode
# Example output: /Users/username/.opencode/bin/opencode

Windows

where.exe opencode

3. Open Settings → Agent Client. The default command (opencode) works in many cases. If the agent is not found automatically, set the OpenCode path to the path found above, or click Auto-detect.

Authentication

OpenCode manages provider credentials itself, so there is no API key field for it in Agent Client.

1. Run OpenCode in your terminal:

opencode

2. Run the /connect command in the TUI, select a provider, and paste its API key.

Credentials are stored in ~/.local/share/opencode/auth.json and are picked up by the opencode acp process that Agent Client starts. You can also configure providers from the command line with opencode auth login.

Migrating from a custom agent

If you previously set up OpenCode as a custom agent with the id opencode (as these docs once described), your settings are migrated to the preset automatically — saved sessions keep working.

Verify Setup

1. Click the robot icon in the ribbon or use the command palette: "Open chat view"
2. Switch to OpenCode from the agent dropdown in the chat header
3. Try sending a message to verify the connection

Having issues? See Troubleshooting.