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Migrate Claude model strings and prompts from Sonnet 4.0, Sonnet 4.5, or Opus 4.1 to Opus 4.5. Updates model strings across Anthropic API, AWS Bedrock, Google Vertex AI, and Azure AI Foundry platforms Removes unsupported beta headers (e.g., context-1m-2025-08-07 ) and adds effort parameter set to "high" Provides optional prompt adjustments for known Opus 4.5 behavioral differences: tool overtriggering, over-engineering, code exploration conservatism, frontend design, and thinking sensitivity...

Inspect the full instructions your agent will receiveExpand

This is the exact playbook injected into your agent when the skill activates — shown here so you can audit it before installing. You don't need to read it to use the skill.

by anthropic

Migrate Claude model strings and prompts from Sonnet 4.0, Sonnet 4.5, or Opus 4.1 to Opus 4.5. Updates model strings across Anthropic API, AWS Bedrock, Google Vertex AI, and Azure AI Foundry platforms Removes unsupported beta headers (e.g., context-1m-2025-08-07 ) and adds effort parameter set to "high" Provides optional prompt adjustments for known Opus 4.5 behavioral differences: tool overtriggering, over-engineering, code exploration conservatism, frontend design, and thinking sensitivity... npx skills add https://github.com/anthropics/claude-code --skill claude-opus-4-5-migration Download ZIP GitHub136k

Copy & paste — that's it

npx skills add https://github.com/anthropics/claude-code --skill claude-opus-4-5-migration

Run this in your project — your agent picks the skill up automatically.

No common issues documented yet. If you hit a problem, the repository's GitHub Issues page is the best place to look.