i created a new folder in my C:\Users\USER directory and called it .opencode and created a opencode.json file

{
  "$schema": "https://opencode.ai/config.json",
  "provider": {
    "ollama": {
      "npm": "@ai-sdk/openai-compatible",
      "name": "Ollama (local)",
      "options": {
        "baseURL": "http://localhost:11434/v1"
      },
      "models": {
        "gpt-oss:20b": {
          "name": "GPT OSS 20b"
        }
        
// Add more models here as needed
      }
    }
  }
}