code-modernization Claude Code Plugin

This plugin adds a guided, command-driven workflow to Claude Code for modernizing legacy codebases. According to the README, work begins with a /modernize command that captures the user's intent, then proceeds through an assessment, an interactive dependency map, extraction of testable business rules, and a phased plan that must be approved before any code is changed. Once approved, the user can choose to upgrade the existing technology stack, rewrite the code in another language, or rebuild it on a new architecture, and the outcome is checked by an independent verification step that compares old and new behavior on shared and newly generated inputs. The plugin also runs a security-hardening scan, produces a single consolidated HTML report, and delegates specialized tasks to a set of purpose-built agents, with an optional early-access live progress pane for real-time status. The README states that the legacy source itself is never modified, with all outputs written to separate analysis and modernized directories.