Legacy Code with AI: Understand, Modernize, Migrate

practitioner

en

• - Turn a system nobody fully understands into a verified map you can defend in a design review.
• - Pin the current behavior of untested code with agent-generated golden-master tests, so refactoring finally has a tripwire.
• - Carve one already-tested seam out of the monolith with agent help, then run it safely behind the code it replaces.
• - Run the deterministic recipe first, then let an agent clean up only what it leaves behind.
• - Translate one already-migrated module into a second language, then ship it with the same proof that showed the original worked.
• - Generate the README, the ADRs, and the CI check the codebase never had, then prove they stay honest as the code keeps moving.

• Url: https://aiacademy.anthropos.work/chapters/legacy-code-ai-intro/ · Legacy Code with AI: Start Here · Position: 1 · A 10-minute orientation to the Legacy Code with AI path: why brownfield engineering finally has a safe agent loop, how the seven chapters build on each other, and where to start.
• Url: https://aiacademy.anthropos.work/chapters/legacy-map-codebase/ · Map an Unknown Codebase · Position: 2 · Turn a system nobody fully understands into a verified map you can defend in a design review.
• Url: https://aiacademy.anthropos.work/chapters/legacy-characterization-tests/ · Characterization Tests · Position: 3 · Pin the current behavior of untested code with agent-generated golden-master tests, so refactoring finally has a tripwire.
• Url: https://aiacademy.anthropos.work/chapters/legacy-strangler-pattern/ · The Strangler Pattern · Position: 4 · Carve one already-tested seam out of the monolith with agent help, then run it safely behind the code it replaces.
• Url: https://aiacademy.anthropos.work/chapters/legacy-framework-migration/ · Migrating to Java 21 · Position: 5 · Run the deterministic recipe first, then let an agent clean up only what it leaves behind.
• Url: https://aiacademy.anthropos.work/chapters/legacy-language-translation/ · Language Ports, Verified · Position: 6 · Translate one already-migrated module into a second language, then ship it with the same proof that showed the original worked.
• Url: https://aiacademy.anthropos.work/chapters/legacy-doc-recovery/ · Documentation, Recovered · Position: 7 · Generate the README, the ADRs, and the CI check the codebase never had, then prove they stay honest as the code keeps moving.
• Url: https://aiacademy.anthropos.work/chapters/legacy-rewrite-refactor-memo/ · Rewrite or Refactor · Position: 8 · Turn agent-gathered evidence about cost, risk, and reversibility into a decision memo executives can actually hold you to.

Course Mode: online · Course Workload: PT160M · Mode: online