Gemini-CLI Manual config worked...

[webitube]

First, many thanks! This worked perfectly!

I just tested this with Unity 6.1 and gemini-cli and it worked perfectly.
I didn't ask for any crazy (just add a cube and make it spin), but it worked. The main issue was the manual setup. (I tried another Unity MCP server and had config issues.)

For reference, to config gemini-cli, you need to update settings.json. There are two: global and project-specific.
The global settings.json is in:

• Linux/macOS: ~/.gemini/settings.json
• Windows: %USERPROFILE%.gemini\settings.json

If you want to limit it to the specific unity project, put it in the project's .gemini/settings.json.

Update

• This is a gemini issue: I just asked it to create a scroll rect with a long list of buttons and it a number of errors along the way then ran out of gemini-2.5 pro tokens. Then, said I had to resubmit with gemini-2.5-flash. When I tried to prompt it to continue and finish, it couldn't.
  In fact, there were a lot of issues with the scroll rect, its config. (It didn't even have an EventSystem.) So, gemini (or any other model I would expect) would not be good for UI layout. You will still have to do that yourself.

[Scriptwonder]

The update is a terrific use case that we need to improve in the future (I will check how the UI layout generation work), thanks for the update!
Also thank you for the manual config part, we will add it to the Readme later. May I ask what did you add to the json file? the similar mcp server structure?

[webitube]

You just need to add or update the "mcpServers" properties of settings.json with the config that is provided by MCP Editor's Manual Setup.
Manually merging the new property is pretty straightforward:

> {
>   . . . Other GeminiCLI JSON Properties if present (comma delimted)
> 
>   
>   "mcpServers": {
>     "unityMCP": {
>       "command": "uv",
>       "args": [
>         "--directory",
>         "[Path specific to your project as provided by Unity MCP Editor",
>         "run",
>         "server.py"
>       ]
>     }
>   }
> }

I suspect that Gemini probably hasn't been trained on much Unity -- esp. gameobject manipulation. Only basic stuff is available online in a variety of tutorials and wouldn't help much in making something actually work.

Gemini (and others) are better at just writing C# but they sometimes make mistakes when dealing with the Unity API.