Bug: OpenCode Desktop does not execute valid OpenAI tool calls from qwen3-coder:30b (Ollama) #33959

Description

Summary

OpenCode Desktop displays raw function call output instead of executing the tool call when using qwen3-coder:30b through Ollama.

Manual API tests show that Ollama returns valid OpenAI tool_calls, therefore the issue appears to be inside OpenCode Desktop rather than the model or Ollama.

OpenCode configuration
{
"provider": {
"ollama": {
"name": "ollama",
"npm": "@ai-sdk/openai-compatible",
"options": {
"baseURL": "http://localhost:11434/v1"
},
"models": {
"qwen3-coder:30b": {
"name": "qwen3-coder:30b"
}
}
}
}
}

The same Ollama instance successfully returns valid OpenAI tool calls when tested manually outside OpenCode.

This suggests the problem is likely inside OpenCode Desktop's handling of tool calls for qwen3-coder rather than in Ollama or the model itself.

Plugins

No response

OpenCode version

1.17.11

Steps to reproduce

Ask:

Is there a DbContext in the solution?

or

Use grep directly. Do not use task.
Search all C# files for DbContext.

OpenCode responds with:

I'll search for DbContext...

<function=task>
<parameter=description> ...
<parameter=prompt> ...

instead of executing the tool.

Manual API verification

Calling Ollama directly:

POST /v1/chat/completions

with:

{
"model": "qwen3-coder:30b",
"messages": [
{
"role": "user",
"content": "Check if there is a DbContext in the solution."
}
],
"tools": [
{
"type": "function",
"function": {
"name": "task",
"description": "Launch a new agent",
"parameters": {
"type": "object",
"properties": {
"description": { "type": "string" },
"prompt": { "type": "string" },
"subagent_type": { "type": "string" }
},
"required": [
"description",
"prompt",
"subagent_type"
]
}
}
}
],
"tool_choice": "auto",
"stream": false
}

returns:

{
"choices": [
{
"message": {
"content": "None of the provided functions can be used...",
"tool_calls": [
{
"type": "function",
"function": {
"name": "task",
"arguments": "{"description":"Check for DbContext in the solution","prompt":"Check if there is a DbContext in the solution.","subagent_type":"file_explorer"}"
}
}
]
},
"finish_reason": "tool_calls"
}
]
}
The returned tool call follows the OpenAI format and should be executable.

Screenshot and/or share link

No response

Operating System

Windows 11

Terminal

Windows Terminal