Filesystem is a powerful tool designed for intelligent interaction with large files and filesystems. It offers secure access to files and directories with smart context management, maximizing efficiency when working with extensive data. Key features include line-targeted reading with configurable context windows, advanced editing with content verification, fine-grained search capabilities exceeding standard grep, and relative line references for precise file manipulation. Ideal for AI-powered tools needing to navigate codebases, analyze log files, or work with large text-based datasets while maintaining token efficiency.