Worked on stabilizing text rendering in the godotengine/godot repository by addressing issues with zero-width character handling in the text_server_fb module. Focused on low-level programming in C++ to ensure that zero-width spaces and related Unicode control characters do not affect visual advance or text indexing, thereby improving text shaping accuracy and layout stability. Delivered a targeted patch that prevents these characters from perturbing layout calculations, resulting in more reliable UI rendering. The work demonstrated a strong understanding of text rendering pipelines and Unicode handling, contributing a precise bug fix that enhances the robustness of Godot’s text rendering across various scenarios.