Namcap is a command line tool used in Arch Linux to perform static analysis of package build files and binary packages. It scans the packages and provides a report highlighting potential issues or errors. Namcap checks various aspects of the package including its structural integrity, commonly overlooked files or directories, dependencies, permissions, and other metadata. It helps package maintainers in detecting packaging mistakes or oversights before the packages are distributed. Namcap leverages a set of predefined checks and rules to perform the analysis, and it can also be extended with custom scripts. The tool is lightweight, efficient, and designed specifically for Arch Linux, making it an essential part of the package maintenance process. It aids in ensuring the quality and reliability of packages in the Arch Linux ecosystem.