claude-code/plugins/claude-opus-4-5-migration/README.md

Claude Opus 4.5 Migration Plugin

Migrate your code and prompts from Sonnet 4.x and Opus 4.1 to Opus 4.5.

Overview

This skill updates your code and prompts to be compatible with Opus 4.5. It automates the migration process, handling model strings, beta headers, and other configuration details. If you run into any issues with Opus 4.5 after migration, you can continue using this skill to adjust your prompts.

Usage

"Migrate my codebase to Opus 4.5"

Learn More

Refer to our prompting guide for best practices on prompting Claude models.

Authors

William Hu (whu@anthropic.com)