January 2025 monthly summary for tensorflow/tflite-micro: Key feature delivered - Cortex-M Build: Signed Char Support Flag. Introduced SIGNED_CHAR variable and conditional application of -fsigned-char or -funsigned-char for Cortex-M builds, enabling signed char support and build-time flexibility. This change improves portability and reduces runtime and build-time char-sign issues across Cortex-M targets. In addition, there were no major bugs fixed this month. Overall impact: enhances embedded portability, stabilizes cross-compiler behavior, and supports more robust codebases that rely on explicit char signedness. Technologies/skills demonstrated: C/C++ build configuration, conditional compilation, compiler flag management, embedded development, cross-target build pipelines, contribution to TF Lite Micro repository, code review and collaboration.