You are using Claude Code to accelerate software development. Your team uses it for code generation, refactoring, debugging, and documentation. You need to integrate it into your development workflow with custom slash commands, CLAUDE.md configurations, and understand when to use plan mode vs direct execution. A security audit requires updating your authentication library from v2 to v3. The migration guide documents breaking changes: `authenticate()` now returns a Promise instead of accepting a callback, the `User` type has restructured fields, and three deprecated methods were removed. Grep shows the library is imported in 45 files across several modules. What's the most effective approach?
Select one answer.
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