Opus 4.5 Migration Guide

The skill is designed to search, read, and modify the user's codebase (e.g., update model strings, remove headers, add parameters). While this is the stated purpose, it grants significant file system access and modification capabilities to the agent, which could be abused if the skill's logic is compromised or extended beyond its intended scope.

Search codebase for model strings and API calls; Update model strings to Opus 4.5; Remove unsupported beta headers; Add effort parameter set to 'high'

The skill instructs the agent to read content from local reference files (e.g., `references/prompt-snippets.md`, `references/effort.md`) and inject it into user prompts or configurations. If these local files are not securely managed or can be tampered with, an attacker could inject malicious instructions or data into the agent's context or the user's codebase.

Add the snippet from `references/prompt-snippets.md`; See `references/prompt-snippets.md` for the full text of each snippet to add; See `references/effort.md` for configuring the effort parameter