Niels den Breeje developed a robust temporary directory management feature for the projectdiscovery/nuclei repository, focusing on the Nuclei SDK and engine. Using Go and leveraging backend and SDK development skills, he introduced a configurable tmpDir field with safe default initialization, allowing users to specify custom temporary directories. He refined the directory creation logic to handle parent and temporary directories efficiently, improving test isolation and deployment flexibility for multi-tenant environments. Niels also updated documentation and refactored code to enhance readability and maintainability. His work addressed environment-specific errors, resulting in more reliable CI processes and standardized temporary storage handling.