code-modernization plugin for Claude

What am I dealing with? Inventory, complexity, debt, security and a recommended modernization pattern

Write the phased Modernization Brief — the plan a steering committee approves and the build commands execute against

Mine the business rules out of the code into testable Given/When/Then rule cards with file:line citations

Security scan of the legacy system with a reviewable remediation patch (OWASP, CWE, CVEs, secrets, injection)

Show me the structure — dependencies, data flow, entry points and business flows, as an interactive map

Run this first — checks the environment, records where the code lives, and says what to fix before anything else runs

Rebuild the system from its extracted intent on a new architecture, with two human checkpoints

Confirm or correct the business rules that need a person's judgement; the plan and the build read your answers

Where am I? Progress, what is stale, and the exact next command to run — start here when unsure

Rewrite one legacy module in the target stack, with tests that prove it behaves the same

Same-stack version uplift (e.g. .NET Framework 4.8 to .NET 8, Java 8 to 17) — keep the code, fix the version deltas, prove nothing changed

Prove the modernized code behaves like the legacy, with an independent re-check and one verdict per module