[BUG] Bug with array square brackets with Gemini (various models) - Related/same issue to 7576

[64MM4-KN1F3]

Problem (one or two sentences)

Hey roo folks, was the following fix targetted only for C#?

@mrubens @hannesrudolph, I should have mentioned in my prev reply in 7576 that I'm seeing this issue with python too (and I'm guessing the problem could be non-language specific as a result)

I just built a255c95 and using gemini 2.5 via GCP API (pro + flash) a similar (or the same) issue remains:

Example of issue 📛

Create the following file 'roo_test.py'

import os

script_path = os.path.abspath(os.path.dirname(__file__))
populated_variable = script_path

print(f"The script is run from: {populated_variable}")

I asked the following in Code mode using various gemini models via the GCP API :
Please update the script @/roo_test.py to print a second output showing only the first character of the populated_variable string

File modification:

<<<<<<< SEARCH
:start_line:6
-------
print(f"The script is run from: {populated_variable}")
=======
print(f"The script is run from: {populated_variable}")
print(f"The first character is: {populated_variable}")
>>>>>>> REPLACE

❌

Context (who is affected and when)

When user requests code modification involving square brackets

Reproduction steps

Create the following file 'roo_test.py'

import os

script_path = os.path.abspath(os.path.dirname(__file__))
populated_variable = script_path

print(f"The script is run from: {populated_variable}")

I asked the following in Code mode using various gemini models via the GCP API :
Please update the script @/roo_test.py to print a second output showing only the first character of the populated_variable string

File modification:

<<<<<<< SEARCH
:start_line:6
-------
print(f"The script is run from: {populated_variable}")
=======
print(f"The script is run from: {populated_variable}")
print(f"The first character is: {populated_variable}")
>>>>>>> REPLACE

❌

Expected result

Second print should be: print(f"The first character is: {populated_variable[0]}")

Actual result

print(f"The first character is: {populated_variable}")

Variations tried (optional)

No response

App Version

Version: 3.28.3+ (Built from a255c95)

API Provider (optional)

Google Gemini

Model Used (optional)

Gemini 2.5 pro + flash via GCP API

Roo Code Task Links (optional)

No response

Relevant logs or errors (optional)

[roomote]

I'm exploring a potential fix for the square bracket issue with Gemini models. This appears to be a broader issue affecting multiple languages beyond just C#. I'll investigate the root cause and open a PR to share progress.

[roomote]

I've opened PR #8108 with a fix for this issue: #8108

The fix applies the existing unescapeHtmlEntities function to all text yielded from the Gemini API, ensuring that square brackets and other HTML entities are properly unescaped in the streaming responses. This should resolve the issue for Python and all other languages.

All CI checks have passed successfully. Feedback welcome!

[daniel-lxs]

Hey @64MM4-KN1F3 #7576 applies to all languages, not only C#, I think in this case the model is simply not making any change, otherwise the change would look like this:

print(f"The first character is: {populated_variable0}")

Notice the "0" without the brackets.