Worked across unclecode/crawl4ai, knownsec/aipyapp, and projectdiscovery/nuclei-templates to deliver targeted improvements in observability, user experience, and security. Enhanced crawl4ai by implementing verbosity-controlled logging and refining output formatting, using Python and robust error handling to improve code quality and downstream processing. In aipyapp, improved user guidance for LLM switching and resolved multi-line JSON parsing issues, leveraging API integration and localization skills to reduce user confusion and parsing errors. For nuclei-templates, externalized MySQL credential wordlists and expanded reflected XSS detection to POST requests, applying JavaScript, YAML, and vulnerability assessment expertise to increase maintainability and detection coverage.