Legacy Modernization

Purpose

Replace a legacy system incrementally, keeping it in production the entire time. The failure mode this skill exists to prevent is the two-year rewrite that ships nothing and is cancelled.

When to Use

• A system that works but resists change.
• Migrating off an unsupported framework, runtime, or vendor.
• Extracting a service from a monolith.
• Any proposal that starts with "we should just rewrite it".

Capabilities