Worked on enhancing the sandboxed filesystem bridge for the openclaw/openclaw repository, focusing on secure and reliable directory creation within isolated workspaces. Developed a validation mechanism for directory creation that leverages an allowedTypes option to assert path safety, ensuring that mkdirp operations remain confined within designated boundaries. Applied explicit checks to prevent unsafe directory traversal, thereby strengthening sandbox security and maintaining operational robustness. Utilized JavaScript and TypeScript to implement these features, emphasizing file system operations and sandbox security. The work improved the reliability of directory management in sandboxed environments, supporting safer and more predictable file system interactions during testing and development.