# legacy-modernizer

> Claude/Codex skill by [@jeffallan](https://omgskills.com/library/jeffallan/index.md) · 8.8k stars · Updated 2026-05-01

Designs incremental migration strategies, identifies service boundaries, produces dependency maps and migration roadmaps, and generates API facade designs for aging codebases. Use when modernizing legacy systems, implementing strangler fig pattern or branch by abstraction, decomposing monoliths, upgrading frameworks or languages, or reducing technical debt without disrupting business operations.

Tags: ai-agents, claude, claude-code, claude-marketplace, claude-skills

## Install

```sh
git clone https://github.com/Jeffallan/claude-skills /tmp/claude-skills && ln -s /tmp/claude-skills/skills/legacy-modernizer ~/.claude/skills/legacy-modernizer
```

## Links

- HTML page: https://omgskills.com/skills/jeffallan/claude-skills/legacy-modernizer/
- GitHub: https://github.com/Jeffallan/claude-skills
- Author: [@jeffallan](https://omgskills.com/library/jeffallan/index.md)

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