Worked on improving the reliability of the mermaid-js/mermaid-cli repository by addressing a critical issue in the rendering pipeline related to Puppeteer’s scale factor handling. Focused on CLI development using JavaScript, the work involved implementing a float parser to ensure the --scale argument is correctly interpreted, thereby enhancing input validation and error handling. This fix reduced the risk of mis-scaled diagrams and runtime errors during automated rendering processes. By strengthening the robustness of argument parsing, the update contributed to more stable CLI renders and smoother integration in automated pipelines, reflecting a careful approach to error prevention and input management.