Bug with array square brackets for Roo + gemini-2.5-pro

App Version

3.26.3

API Provider

Google Gemini

Model Used

gemini-2.5-pro

Roo Code Task Links (Optional)

No response

🔁 Steps to Reproduce

Windows 11.
Open VS Code.

Ensure you are using a Google Gemini API provider and model as shown in the image. Gemini-2.5-pro:

Switch to code mode and issue the instruction:
"Create a new test file named RooTestGemini.cs with a method in it that creates a string array with 5 elements and then sets the third element to contain the word 'hello'."

Be saddened to see that the generated code is incorrect and missing the array brackets and indices as shown in the image:

Be intrigued to find that the exact same instruction and same LLM model and api provider succeeds in the competitor product Cline. See image:

Try similar instructions and be saddened to see that Roo + Gemini-2.5-pro fails to write c# content with arrays with square brackets and indices. And be baffled that no such problem exists with Cline + Gemini-2.5-pro, or with Roo + GPT-4.1 or Roo + Claude.

💥 Outcome Summary

Expected arrays with square brackets and indices but got missing brackets and indices.

📄 Relevant Logs or Errors (Optional)

[roomote]

I'm exploring a potential fix for the issue with square brackets and array indices being stripped from C# code when using Google Gemini models. I'll investigate the Gemini API integration and response processing to identify where these characters might be getting lost.

[roomote]

I've opened PR #7577 with a fix for this issue: #7577

The fix adds support for unescaping square bracket HTML entities ([, ], [, ]) that Gemini was using in its responses. This should resolve the issue where array syntax was being corrupted in C# code generation.

All tests are passing and the CI checks have completed successfully. The fix is ready for review!

[64MM4-KN1F3]

+1 - thanks for raising + working on a fix.

This has been doing my head in. 🫠 Gemini + roo just can't index arrays or tuples (possibly lists too). Sill happening as of Version: 3.28.1 (5c76c18)