Worked on the openclaw/openclaw repository to deliver security hardening and reliability improvements focused on safer command execution and secure temporary file handling. Addressed command injection risks by replacing execSync with execFileSync, ensuring binaries are invoked directly with arguments rather than through shell commands. Enhanced temporary file security by switching from Math.random() to crypto.randomBytes() for file naming and setting file permissions to 0o600, reducing the risk of TOCTOU vulnerabilities. Utilized JavaScript and TypeScript alongside Node.js to implement these changes, resulting in a more secure system programming environment without disrupting existing workflows or introducing breaking changes.