Knife is a feature-rich Burp Suite extension written in Java that enhances Burp's functionality through right-click context menus, automatic request modification, and additional message editor tabs. It provides tools for cookie management (update/set from history), header manipulation, host/scope additions, running external commands (SQLMap, Nmap) with request data as variables, chunked transfer encoding, URL discovery and fuzzing, Unicode-to-Chinese decoding, and information extraction (URLs, emails, IPs) from responses. The plugin uses a configurable rules engine stored as JSON to automatically add/replace/remove headers, drop or forward requests based on host/URL/keyword matches, and control scope via tool flag and URL pattern matching. Configuration is managed through a comprehensive GUI table. The codebase is well-organized with clear separation of concerns, though some deprecated classes remain. It relies on the Burp Extender API and several Apache and Google libraries.