WooYun Legacy is a Claude Code security plugin that enriches defensive security analysis with historical vulnerability data from the WooYun platform. Its knowledge base is derived from 22,132 publicly documented business-logic vulnerability cases collected between 2010 and 2016. Rather than teaching new exploitation techniques, it adds real cases, statistics, recurring patterns, and data-driven priorities to security reports. The repository organizes information into methodology references, technical knowledge, vulnerability categories, examples, and evaluation data. ...