Does it automatically change my system prompts?

By default, it only updates model strings and removes unsupported headers. Behavioral prompt adjustments for issues like over-engineering are only applied if you explicitly request them.

Does this skill migrate Haiku models?

No, this skill is specifically designed for migrating Sonnet 4.0/4.5 and Opus 4.1 to Opus 4.5. It explicitly excludes Haiku models to prevent incompatible transitions.

Which cloud platforms are supported for model string updates?

The migrator supports model strings for the Anthropic API (1P), AWS Bedrock, Google Vertex AI, and Azure AI Foundry.

What is the 'effort' parameter mentioned in the guide?

The skill can add a 'high' effort parameter to your API calls, which signals the model to provide more thorough reasoning for complex tasks.

How does it handle the 1M context beta header?

Since Opus 4.5 does not currently support the context-1m-2025-08-07 beta header, the skill removes it and leaves a comment for the developer's reference.

Opus 4.5 Model Migrator

Name: Opus 4.5 Model Migrator
Author: SwervoJake

bySwervoJake

0•

Data Science & ML

Migrates codebases and prompts from earlier Claude models to Opus 4.5 by automating model string updates and behavioral adjustments.

This skill provides a comprehensive one-shot migration path for developers moving from Claude Sonnet 4.0, 4.5, or Opus 4.1 to the flagship Opus 4.5 model. It handles the tedious task of updating platform-specific model strings for Anthropic API, AWS Bedrock, Google Vertex AI, and Azure AI Foundry, while also managing the removal of unsupported beta headers. Beyond simple string replacement, it offers intelligent prompt engineering adjustments to mitigate common Opus 4.5 behavioral shifts such as tool overtriggering, over-engineering, and sensitivities related to the 'thinking' parameter.

Key Features

01Tailored prompt adjustments for tool overtriggering and over-engineering prevention

02Refined frontend design and code exploration guidelines for Opus 4.5

030 GitHub stars

04Automated model string replacement for Anthropic, AWS, Google, and Azure platforms

05Removal of unsupported beta headers like the 1M context window

06Support for 'high' effort parameter configuration in API calls

Use Cases

01Upgrading production AI applications from Sonnet to the more powerful Opus 4.5 model

02Adjusting tool-calling logic for better accuracy and reduced overtriggering in Opus 4.5

03Refactoring system prompts to prevent AI over-engineering and unnecessary file creation

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add swervojake/claaaude-studio claude-opus-4-5-migration

For use in Claude.ai and ChatGPT

Key Features

01Tailored prompt adjustments for tool overtriggering and over-engineering prevention

02Refined frontend design and code exploration guidelines for Opus 4.5

030 GitHub stars

04Automated model string replacement for Anthropic, AWS, Google, and Azure platforms

05Removal of unsupported beta headers like the 1M context window

06Support for 'high' effort parameter configuration in API calls

Use Cases

01Upgrading production AI applications from Sonnet to the more powerful Opus 4.5 model

02Adjusting tool-calling logic for better accuracy and reduced overtriggering in Opus 4.5

03Refactoring system prompts to prevent AI over-engineering and unnecessary file creation

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add swervojake/claaaude-studio claude-opus-4-5-migration

For use in Claude.ai and ChatGPT