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Automate the migration of your codebase to use Claude Opus 4.5, handling model strings, beta headers, and configuration updates.

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Overview

The Claude Opus 4.5 Migration plugin is a skill that updates your code and prompts to be compatible with Opus 4.5. It automates the migration process, handling:
  • Model version strings
  • Beta header requirements
  • Configuration file updates
  • Prompt adjustments for Opus 4.5

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Installation

This plugin is bundled with Claude Code. To enable it: 
/plugin enable claude-opus-4-5-migration

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Usage

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Migrate to Opus 4.5

Simply describe your migration needs in natural language: 
"Migrate my codebase to Opus 4.5"

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What Gets Migrated

The skill automatically handles:

Model Strings

Updates model identifiers to Opus 4.5 format

Beta Headers

Adds or updates required beta headers

Configuration

Updates configuration files and settings

Prompts

Adjusts prompts for Opus 4.5 behavior

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Examples

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Migrate API Integration

"Update my Anthropic API calls to use Opus 4.5"
The skill will:
  1. Find all API client instantiations
  2. Update model strings to Opus 4.5
  3. Add required beta headers
  4. Update configuration files

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Fix Opus 4.5 Issues

"I'm having issues with Opus 4.5 responses, can you adjust my prompts?"
The skill continues to help even after initial migration, adjusting prompts and configuration based on observed behavior.

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Configuration

No additional configuration required. The skill activates automatically when you mention Opus 4.5 migration.

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Learn More

For Opus 4.5 best practices, see:

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Details

Name: claude-opus-4-5-migrationType: SkillAuthor: William Hu ([email protected])Version: 1.0.0

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Troubleshooting

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Migration didn’t update all files

The skill focuses on main configuration and API integration files. For comprehensive updates: 
"Search the entire codebase for references to claude-sonnet-4 and update them"

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Still seeing deprecated model warnings

Ensure beta headers are properly configured: 
"Check all API clients have the correct beta headers for Opus 4.5"

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