Tool calls with edits/write fail when using Qwen3 30b in 0.0.10

[ManasInd]

What happened?

When using Qwen code 0.0.10 with Qwen3 30b, I observe repeated failures with edit and write file tool calls.

In edit, the error is: params/old_string must be string
In write, the error is: params/content must be string

I have tried multiple times and the call never works.

It used to work earlier with 0.0.5.

I am using LMStudio to run Qwen3 30b using mlx in Apple device.

There is another error thrown "params/is_background must be boolean" when executing commands, but there is already an issue open for it.

What did you expect to happen?

This issue in latest version makes it difficult to update the files in repo when using qwen 30b locally. The tool calls for edits and write worked fine with Qwen3 30b in 0.0.5 so I assume some recent changes may have caused the regression.

Client information

$ qwen /about
│ About Qwen Code                                                                               │
│                                                                                               │
│ CLI Version                     0.0.10                                                        │
│ Git Commit                      5af25b26                                                      │
│ Model                           mlx-community/qwen3-coder-30b-a3b-instruct                    │
│ Sandbox                         no sandbox                                                    │
│ OS                              darwin                                                        │
│ Auth Method                     openai 

Login information

No response

Anything else we need to know?

No response

[regismesquita]

I am having the same write_file issue (content one) , with 0.0.12 using GLM-4.5

[MrMYHuang]

I have the same issue with qwen-code 0.0.14, LM Studio 0.3.30, Qwen3-Coder-30B-A3B-Instruct-MLX-4bit, on my MacBook M1 MAX.

It seems that an issue of WriteFile content. The log:

  │ x  WriteFile {"file_path":"/Users/myh/Documents/snake/package.json","content":{"name":"snake-game","version":"1.0.0","desc… │
 │    params/content must be string │

It can be seen that content is a JS object, not a string.

[MrMYHuang]

I tested qwen-code v0.1.1. Unfortunately, it still has WriteFile issue.

I am not sure whether it is a bug of LM Studio. If anyone needs a workaround, please refer to my one: #860

[vxtra1973]

I tested qwen-code v0.1.1. Unfortunately, it still has WriteFile issue.

I am not sure whether it is a bug of LM Studio. If anyone needs a workaround, please refer to my one: #860

same here and using litellm, will try with your change

[MrMYHuang]

I tested qwen-code v0.1.1. Unfortunately, it still has WriteFile issue.

I am not sure whether it is a bug of LM Studio. If anyone needs a workaround, please refer to my one: #860

I tried qwen-code 0.1.3 with llama.cpp server 6940 and LM Studio 0.3.31.

llama.cpp worked well with qwen-code WriteFile, but LM Studio didn't! So, this issue is very like a bug of LM Studio.

The following is how I use qwen-code with llama.cpp server:
llama-server --ctx-size 162144 --jinja -hf ggml-org/Qwen3-4B-Instruct-2507-Q8_0-GGUF

export OPENAI_API_KEY=api_key
export OPENAI_BASE_URL=http://localhost:8080/v1
export OPENAI_MODEL=Qwen3-4B-Instruct-2507-Q8_0-GGUF
qwen

Please try it by creating an npm project app and check if package.json is correctly generated.