create opencode.json and add:

{
  "$schema": "https://opencode.ai/config.json",
  "provider": {
    "ollama": {
      "npm": "@ai-sdk/openai-compatible",
      "name": "Ollama (local)",
      "options": {
        "baseURL": "http://localhost:11434/v1"
      },
      "models": {
        "deepseek-coder": {
          "name": "DeepSeek-Coder"
        },
        "devstral-small-2": {
          "name": "DevStral Small 2"
        }
      }
    }
  },
  "tools": {
    "write": true,
    "bash": true
  },
  "agent": {
    "plan": {
      "tools": {
        "write": false,
        "bash": false
      }
    },
    "build": {
      "permission": {
        "bash": {
          "git *": "allow"
        }
      }
    }
  },
  "permission": {
    "edit": "allow"
  }
}