Worked on enhancing the espressif/esptool repository by improving its PyInstaller packaging process to bundle pyserial URL handlers, thereby enabling support for various URL protocols and increasing build reliability across different environments. Leveraged Python, YAML, and DevOps skills to ensure that PyInstaller correctly includes all necessary pyserial components, reducing packaging-related failures and streamlining cross-platform distribution. This feature addressed a key pain point in release readiness and developer productivity by supporting URL-based serial workflows. The work demonstrated a strong understanding of continuous integration practices and build tooling, focusing on practical improvements to the packaging and deployment pipeline for esptool.