Installation

Install with CLI Recommended 
gh skills-hub install javax-to-jakarta-migration

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Download and extract to your repository:

.github/skills/javax-to-jakarta-migration/

Extract the ZIP to .github/skills/ in your repo. The folder name must match javax-to-jakarta-migration for Copilot to auto-discover it.

Skill Files (1)

SKILL.md 2.4 KB 
---
name: javax-to-jakarta-migration
description: "Migrate Java code from javax.* to jakarta.* namespace. Use when upgrading to Tomcat 11, Jakarta EE 10, or when javax imports are detected in the codebase."
argument-hint: "File, package, or module to migrate"
---

# javax → jakarta Migration Skill

## When to Use
- Upgrading to Tomcat 11 / Jakarta EE 10+
- Code review detects `javax.*` imports
- Migrating an existing project to the jakarta namespace

## Procedure

### Step 1 — Scan for javax Usage
Search the codebase for all `javax.*` imports that need migration:
```
javax.servlet.*      → jakarta.servlet.*
javax.persistence.*  → jakarta.persistence.*
javax.validation.*   → jakarta.validation.*
javax.annotation.*   → jakarta.annotation.*
javax.inject.*       → jakarta.inject.*
javax.enterprise.*   → jakarta.enterprise.*
javax.faces.*        → jakarta.faces.*
javax.ws.rs.*        → jakarta.ws.rs.*
javax.el.*           → jakarta.el.*
javax.json.*         → jakarta.json.*
javax.mail.*         → jakarta.mail.*
javax.websocket.*    → jakarta.websocket.*
```

**Do NOT migrate** these (they remain in `javax.*`):
- `javax.sql.*` — part of JDK
- `javax.naming.*` — part of JDK (JNDI)
- `javax.crypto.*` — part of JDK
- `javax.net.*` — part of JDK
- `javax.security.auth.*` — part of JDK
- `javax.swing.*`, `javax.xml.parsers.*` — JDK packages

### Step 2 — Update pom.xml
Replace dependency coordinates:

| Old | New |
|-----|-----|
| `javax.servlet:javax.servlet-api` | `jakarta.servlet:jakarta.servlet-api:6.0.0` |
| `javax.persistence:javax.persistence-api` | `jakarta.persistence:jakarta.persistence-api:3.1.0` |
| `javax.validation:validation-api` | `jakarta.validation:jakarta.validation-api:3.0.2` |
| `javax.annotation:javax.annotation-api` | `jakarta.annotation:jakarta.annotation-api:2.1.1` |

### Step 3 — Update web.xml (if present)
```xml
<!-- Old namespace -->
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee" version="4.0">

<!-- New namespace -->
<web-app xmlns="https://jakarta.ee/xml/ns/jakartaee" version="6.0">
```

### Step 4 — Update Java Source Files
Replace all `javax.` imports with `jakarta.` equivalents in `.java` files.

### Step 5 — Verify
1. Run `mvn clean compile` or `gradlew build` — fix any compilation errors
2. Run `mvn test` or `gradlew test` — ensure all tests pass
3. Search for any remaining `javax.*` imports (excluding JDK packages)

### Output
Provide a migration summary listing all files changed, imports replaced, and any manual steps required.

License (MIT)

MIT Source: github/awesome-copilot
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MIT License

Copyright GitHub, Inc.

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.