Does this skill support Claude Haiku 4.5?

No, this migration skill specifically targets Opus 4.5 and excludes Haiku models.

How does it handle the 1M context beta header?

It removes the context-1m-2025-08-07 beta header as it is not yet supported in Opus 4.5 and adds a explanatory comment to your code.

Which models can I migrate from using this skill?

The skill is designed to migrate projects currently using Claude Sonnet 4.0, Sonnet 4.5, or Opus 4.1.

Will it automatically change my prompt logic?

Model strings are updated automatically, but prompt behavioral adjustments (like tool softening) are only applied if you report specific issues or explicitly request them.

Claude Opus 4.5 Migration Guide

Name: Claude Opus 4.5 Migration Guide
Author: Activer007

byActiver007

0•

Data Science & ML

Migrates codebases and prompts from Claude Sonnet 4.0, 4.5, or Opus 4.1 to the Opus 4.5 model across multiple platforms.

This skill provides a comprehensive workflow for transitioning existing AI integrations to Claude Opus 4.5. It automates the identification and replacement of model strings for the Anthropic API, AWS Bedrock, Google Vertex AI, and Azure AI Foundry, while also handling the removal of deprecated beta headers. Beyond simple string replacement, it offers intelligent prompt adjustments to mitigate behavioral differences in Opus 4.5, such as tool overtriggering, over-engineering, and sensitivity to 'thinking' keywords, ensuring a smooth and optimized upgrade process.

Key Features

01Removal of unsupported context-1m-2025-08-07 beta headers

02Specific optimizations for frontend design and code exploration

03Configuration of the high effort parameter for complex tasks

04Automated model string updates for 1P API, Bedrock, Vertex AI, and Azure

05Behavioral prompt tuning for tool usage and over-engineering prevention

060 GitHub stars

Use Cases

01Refining system prompts to prevent tool overtriggering in Opus 4.5

02Standardizing model identifiers across multi-cloud environments like AWS and GCP

03Upgrading production AI applications to the latest Opus 4.5 reasoning model

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add activer007/ordinary-claude-skills claude-opus-4-5-migration

For use in Claude.ai and ChatGPT

Download Skill