Claude Opus 4 5 Migration

When Anthropic releases a new model, updating your codebase means hunting through API calls, adjusting model strings across different platforms, and dealing with behavioral quirks. This migration tool does the grunt work: it scans for old Sonnet 4.0/4.5 and Opus 4.1 references, updates them to proper Opus 4.5 strings for your platform (Anthropic API, Bedrock, Vertex, Azure), removes unsupported beta headers, and adds the effort parameter. It also knows about Opus 4.5's tendency to overtrigger tools and over-engineer solutions, so it can adjust prompts when those issues surface. Beats manually tracking down every model reference and debugging prompt regressions.

Install to Claude Code

npx -y skills add anthropics/claude-code --skill claude-opus-4-5-migration --agent claude-code