CCA-F: Claude Certified Architect — Foundations

By Anthropic · Question Mode

QuestionQ88

Claude Code Configuration & Workflows

You are using Claude Code to speed up software development. Your team uses it for code generation, refactoring, debugging, and documentation. You need to incorporate it into your development workflow with custom slash commands, CLAUDE.md configurations, and an understanding of when to use plan mode versus direct execution.

A security audit requires upgrading your authentication library from v2 to v3. The migration guide describes breaking changes: authenticate() now returns a Promise rather than accepting a callback, the User type has reorganized fields, and three deprecated methods have been removed. Grep indicates that the library is imported in 45 files across several modules.

What is the most effective approach?

Explanation

For a broad authentication-library migration with breaking asynchronous API, type, and removed-method changes, analyze the codebase before editing to identify every usage, affected module boundary, and runtime path. A migration strategy based on that inventory supports consistent transformations and targeted validation, including paths that a test suite may not cover. Claude Code plan mode is appropriate for this analysis phase because it can inspect the codebase without modifying files or executing commands.

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