Classic Duo Chat - Code Refactoring Output Truncated

Summary

GitLab Duo truncates refactoring output when working with large code files, cutting off mid-function without completing the refactored code or providing a summary message.

This issue is similar to #575987 (closed) but occurs specifically when using the /refactor command in GitLab Duo, rather than during code explanation/chat interactions.

Steps to Reproduce

1. Open a large Python file in your (Web) IDE (see attached example.py)
2. Highlight the entire code
3. Type /refactor in the IDE GitLab Duo side panel
4. Observe the truncated output

Expected Behavior

• GitLab Duo should complete the full refactored code
• A summary message should appear at the end recapping the changes made
• All functions should be fully refactored and complete

Actual Behavior

• Output is cut off mid-function (stops at function definition with no body)
  • No summary message is provided
• Refactored code is incomplete and unusable

Additional Context

This truncation issue also occurs when:

• Asking Duo to create large Python scripts (e.g., single functions ≥260 lines)
• Working with highly complex code that would generate lengthy responses

This suggests a general output length restriction/limit in GitLab Duo's response handling.

Attachments

• example.py - Original file used for reproduction
• output.md - Truncated output received from GitLab Duo

Impact

All of our Duo Classic Chat users (regardless self managed, gitlab.com + regardless which version, because it seems again AI Gateway limit related) cannot effectively refactor large or complex code files using GitLab Duo, limiting its usefulness for real-world codebases.