What is the 'effort' parameter used for?

The skill sets the effort parameter to 'high' for Opus 4.5 requests, ensuring the model utilizes its maximum reasoning capability for the migrated tasks.

What happens to my existing beta headers?

The skill identifies unsupported beta headers, such as the 1M context window (context-1m-2025-08-07), and removes them while leaving a developer comment for tracking.

Which cloud platforms are supported for model string updates?

The skill handles model string transformations for the native Anthropic API (1P), AWS Bedrock, Google Vertex AI, and Azure AI Foundry.

Does this skill support Haiku migration?

No, this specific skill is designed for migrating from Sonnet 4.0, Sonnet 4.5, or Opus 4.1 to Opus 4.5. It explicitly does not support Haiku 4.5 migrations.

How does it handle behavioral differences in Opus 4.5?

It provides optional prompt adjustments to soften tool triggering, prevent over-engineering, and replace sensitive keywords like 'think' when extended thinking is not enabled.

Claude Opus 4.5 Migration Helper

Name: Claude Opus 4.5 Migration Helper
Author: akiojin

byakiojin

•

Cloud Infrastructure

Automates the migration of codebases and prompts to the Claude 3 Opus 4.5 model across multiple cloud platforms.

This skill streamlines the transition from Claude Sonnet 4.0, 4.5, or Opus 4.1 to the latest Opus 4.5 model. It automatically identifies and updates model identifiers for Anthropic API, AWS Bedrock, Google Vertex AI, and Azure AI Foundry while managing platform-specific parameters like the high-effort reasoning field. Beyond simple string replacement, it provides intelligent prompt adjustments to mitigate known behavioral shifts in Opus 4.5, such as tool overtriggering, over-engineering, and sensitivity to 'thinking' keywords, ensuring your AI-powered applications maintain peak performance and reliability throughout the upgrade process.

Key Features

01Contextual prompt adjustments to prevent over-engineering and tool overtriggering

02Smart removal of unsupported beta headers like 1M context

03Targeted behavioral fixes for frontend design and code exploration tasks

04Automatic configuration of the high-reasoning 'effort' parameter

052 GitHub stars

06Automated model string updates for Anthropic, Bedrock, Vertex, and Azure

Use Cases

01Refactoring multi-cloud LLM integrations to use the latest model versioning standards

02Tuning system prompts to align with Opus 4.5's unique sensitivity and reasoning patterns

03Upgrading a production application from Claude 3.5 Sonnet to Claude 3 Opus 4.5

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add akiojin/llmlb claude-opus-4-5-migration

For use in Claude.ai and ChatGPT

Download Skill