# legacy-modernizer

> Designs incremental migration strategies, identifies service boundaries, produces dependency maps and migration roadmap…

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.

- Type: Skill
- Made by: Jeffallan
- Category: Developer tools
- Formats: Skills
- Version: 1.1.0
- Source: https://github.com/jeffallan/claude-skills/tree/HEAD/skills/legacy-modernizer
- Page: https://pluginboard.ai/skills/legacy-modernizer

## Works with

- ChatGPT
- Claude
- Gemini
- GitHub Copilot
- Cursor
- Claude Code
- Codex
- Antigravity
- Gemini CLI
- Replit
- OpenClaw
- OpenCode
- Hermes Agent

## Install

### ChatGPT

In ChatGPT: Download the legacy-modernizer folder and zip it, then Plugins → Skills → Create → Upload from your computer. Business and Enterprise plans.

View the folder on GitHub: https://github.com/Jeffallan/claude-skills/tree/HEAD/skills/legacy-modernizer

### Claude

In Claude (web or desktop): Download the legacy-modernizer folder and zip the folder itself, then upload it in Customize → Skills.

View the folder on GitHub: https://github.com/Jeffallan/claude-skills/tree/HEAD/skills/legacy-modernizer

### Gemini

In Gemini: Download the legacy-modernizer folder, then at gemini.google.com click Customize → Skills → Create → Upload and pick the folder (or a .zip of it).

View the folder on GitHub: https://github.com/Jeffallan/claude-skills/tree/HEAD/skills/legacy-modernizer

### GitHub Copilot

Run in your terminal:

```shell
npx -y degit Jeffallan/claude-skills/skills/legacy-modernizer ~/.copilot/skills/legacy-modernizer
```

View the folder on GitHub: https://github.com/Jeffallan/claude-skills/tree/HEAD/skills/legacy-modernizer

### Cursor

Run in your terminal:

```shell
npx -y degit Jeffallan/claude-skills/skills/legacy-modernizer ~/.cursor/skills/legacy-modernizer
```

View the folder on GitHub: https://github.com/Jeffallan/claude-skills/tree/HEAD/skills/legacy-modernizer

### Claude Code

Run in your terminal:

```shell
npx -y degit Jeffallan/claude-skills/skills/legacy-modernizer ~/.claude/skills/legacy-modernizer
```

View the folder on GitHub: https://github.com/Jeffallan/claude-skills/tree/HEAD/skills/legacy-modernizer

Or all of Fullstack Dev Skills, in Claude Code:

```text
/plugin marketplace add Jeffallan/claude-skills
/plugin install fullstack-dev-skills@fullstack-dev-skills
```

### Codex

Run in your terminal:

```shell
npx -y degit Jeffallan/claude-skills/skills/legacy-modernizer ~/.agents/skills/legacy-modernizer
```

View the folder on GitHub: https://github.com/Jeffallan/claude-skills/tree/HEAD/skills/legacy-modernizer

### Antigravity

In Antigravity: Copy the legacy-modernizer folder into ~/.gemini/config/skills (Antigravity app and IDE) or ~/.gemini/antigravity-cli/skills (Antigravity CLI).

View the folder on GitHub: https://github.com/Jeffallan/claude-skills/tree/HEAD/skills/legacy-modernizer

### Gemini CLI

Run in your terminal:

```shell
npx -y degit Jeffallan/claude-skills/skills/legacy-modernizer ~/.gemini/skills/legacy-modernizer
```

View the folder on GitHub: https://github.com/Jeffallan/claude-skills/tree/HEAD/skills/legacy-modernizer

### Replit

Run in your terminal:

```shell
npx -y degit Jeffallan/claude-skills/skills/legacy-modernizer .agents/skills/legacy-modernizer
```

View the folder on GitHub: https://github.com/Jeffallan/claude-skills/tree/HEAD/skills/legacy-modernizer

### OpenClaw

Run in your terminal:

```shell
npx -y degit Jeffallan/claude-skills/skills/legacy-modernizer ~/.openclaw/skills/legacy-modernizer
```

View the folder on GitHub: https://github.com/Jeffallan/claude-skills/tree/HEAD/skills/legacy-modernizer

### OpenCode

Run in your terminal:

```shell
npx -y degit Jeffallan/claude-skills/skills/legacy-modernizer ~/.config/opencode/skills/legacy-modernizer
```

View the folder on GitHub: https://github.com/Jeffallan/claude-skills/tree/HEAD/skills/legacy-modernizer

### Hermes Agent

Run in your terminal:

```shell
npx -y degit Jeffallan/claude-skills/skills/legacy-modernizer ~/.hermes/skills/legacy-modernizer
```

View the folder on GitHub: https://github.com/Jeffallan/claude-skills/tree/HEAD/skills/legacy-modernizer

---
From Pluginboard (https://pluginboard.ai).