Bug: Edit tool generates invalid JSON payload

[ToByDaNy]

Hi, I’m using qwen3-coder-30b-a3b-instruct with the Pi.dev AI agent tools and I encountered an issue where the model generates invalid tool calls when trying to edit files.

The agent attempts to call the edit tool, but the payload is malformed. Example error:

Validation failed for tool "edit": edits.0: must be object

The generated arguments look like this:

{
"path": "backend/services/auth.py",
"edits": "[{"oldText":"...","newText":"..."}]"
}

The problem seems to be that edits is being passed as a string instead of an array/object:

"edits": "[{...}]"

instead of:

"edits": [
{
"oldText": "...",
"newText": "..."
}
]

So the model/tool wrapper appears to serialize the edits array incorrectly.

I’m not sure whether this is:

a model formatting issue,
an agent parser issue,
or a tool schema issue.

Has anyone encountered this before or knows where this should be reported? Thank you for your time !