Integration with Ollama Local

[TheTwinEsper]

Description

Bug Report: Ollama local model not working in OpenCode Desktop

Description

When using OpenCode Desktop application (Windows), after configuring a local Ollama model, the model appears in the list but returns invalid JSON responses ({ "name": "skill", "arguments": { "name": "build" } }) instead of actual text responses.

Environment

• OpenCode version: 1.2.27
• Operating System: Windows
• Ollama version: Running locally on port 11434
• Model: DanyaVoredom/DanyAI-qwen2.5-coder-3b-instruct:latest

Steps to Reproduce

1. Install OpenCode Desktop for Windows
2. Download a model in Ollama (e.g., ollama run DanyaVoredom/DanyAI-qwen2.5-coder-3b-instruct)
3. Configure opencode.json with Ollama provider:

   {
     "provider": {
       "ollama": {
         "npm": "@ai-sdk/openai-compatible",
         "name": "Ollama (local)",
         "options": {
           "baseURL": "http://localhost:11434/v1"
         },
         "models": {
           "DanyaVoredom/DanyAI-qwen2.5-coder-3b-instruct:latest": {
             "name": "DanyAI Coder 3B",
             "_launch": true
           }
         }
       }
     }
   }

4. Open OpenCode Desktop
5. Select the Ollama model from the model list
6. Send a prompt

Expected Behavior

The model should return a normal text response.

Actual Behavior

The model returns invalid JSON: { "name": "skill", "arguments": { "name": "build" } }

Verification

• Ollama API works correctly (tested via curl)
• The same configuration works with OpenCode CLI (terminal version)
• This appears to be a bug specific to the OpenCode Desktop application

Additional Information

• Similar issue reported in GitHub: Ollama local provider is not appearing #19326 (Ollama local provider is not appearing)
• Issue Unable to connect local Ollama #10961 (Unable to connect local Ollama)
• The CLI version works correctly, only Desktop app has this issue

Screenshots

N/A

Plugins

No response

OpenCode version

No response

Steps to reproduce

No response

Screenshot and/or share link

No response

Operating System

No response

Terminal

No response

[github-actions]

This issue might be a duplicate of existing issues. Please check:

• Local Ollama model returns non-human message #12812: Local Ollama model returns non-human message (similar symptom: unexpected/invalid responses from a local Ollama model)
• Ollama subagent executes tool calls correctly but always returns empty text to orchestrator #18423: Ollama subagent executes tool calls correctly but always returns empty text to orchestrator (related unexpected response behavior)

If your issue is distinct from the above, please clarify how it differs. Otherwise, consider adding your details there instead.