Opus 4.5 Migration Guide

The skill requires the ability to 'Search codebase' to identify relevant files and patterns. This implies extensive read access to the user's entire codebase, which could be exploited for reconnaissance or unauthorized data exfiltration if the agent's behavior is manipulated.

1. Search codebase for model strings and API calls

The skill relies on internal Markdown files (`references/effort.md`, `references/prompt-snippets.md`) for critical instructions and content to be inserted into user prompts. If these internal references were sourced from an untrusted supply chain or dynamically loaded, they could be poisoned to inject malicious instructions or data.

See `references/prompt-snippets.md` for the full text of each snippet to add.
See `references/effort.md` for configuring the effort parameter (only if user requests it).