gistfile1.txt

{
  "$schema": "https://opencode.ai/config.json",

  // 3-a.  Register WebUI as a provider
  "provider": {
    "openwebui": {
      "npm": "@ai-sdk/openai-compatible",   // tells OpenCode the wire protocol
      "name": "Open WebUI (local)",         // label shown in the /models list
      "options": {
        "baseURL": "http://localhost:3000/api"   /* <-- your URL here */
      },

      // 3-b.  Expose whichever model(s) WebUI advertises
      "models": {
        "llama3:instruct": { "name": "Llama-3-Instruct" }
      }
    }
  },

  // 3-c.  Pick a default model so OpenCode boots without asking
  "model": "openwebui/llama3:instruct"
}