Install with the bash script from the opencode website:

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

reload your shell (or login again) exec zsh

verify with:

opencode --version

The install script from the opencode repository has a fixed location for the binary located in the users homedirectory together with the user settings. changing this would involve ajusting the script at:

...

INSTALL_DIR=$HOME/.opencode/bin
mkdir -p "$INSTALL_DIR"

...

as a TUI: /home/abel/.opencode/bin/opencode --port 4096 --hostname 0.0.0.0

as a webinterface: /home/abel/.opencode/bin/opencode web --port 4096 --hostname 0.0.0.0

Create a systemd Service File sudo vi /etc/systemd/system/opencode.service
add:

[Unit]
Description=OpenCode AI Assistant
After=network.target

[Service]
Type=simple
User=abel
ProtectHome=false
WorkingDirectory=/home/abel/opencode/projects
ExecStart=/home/abel/.opencode/bin/opencode web --port 4096 --hostname 0.0.0.0
Restart=always
RestartSec=10

[Install]
WantedBy=multi-user.target

User=abel seems unsafe but that is how it works, and seeing as it is on the personal workstation any sequrity risk is minimal.

Start and enable opencode by:

sudo systemctl enable opencode --now

This systemd unit started a web interface on http://localhost:4096/

edit the configuration file: vi ~/.config/opencode/opencode.json

and fill it with:

{
  "$schema": "https://opencode.ai/config.json",
  "provider": {
    "ollama": {
      "npm": "@ai-sdk/openai-compatible",
      "name": "Ollama (local)",
      "options": {
        "baseURL": "http://10.100.10.50:11434/v1"
      },
      "models": {
        "gurubot/GLM-4.6V-Flash-GGUF:Q4_K_M": {
          "name": "GLM-4.6V Flash"
        }
      }
    }
  }
}

there is also a VSCodium plugin. how to set this up you can find here.